JPH027043Y2 - - Google Patents
Info
- Publication number
- JPH027043Y2 JPH027043Y2 JP15373684U JP15373684U JPH027043Y2 JP H027043 Y2 JPH027043 Y2 JP H027043Y2 JP 15373684 U JP15373684 U JP 15373684U JP 15373684 U JP15373684 U JP 15373684U JP H027043 Y2 JPH027043 Y2 JP H027043Y2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- lug
- sidewall
- radial direction
- tread
- 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
Links
- 238000005452 bending Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Tires In General (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、コードレス及びチユーブレスで主に
農耕に使用される低圧タイヤに関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cordless and tubeless low-pressure tire used mainly in agriculture.
（従来の技術）
砂、湿田等で使用されるタイヤは、左、泥上を
走行するために、タイヤが充分に撓み、それによ
り広い接地面積を得、低接地圧とすると共に多大
な浮力を得る必要がある。そのため、この種のタ
イヤはコードレス及びチユーブレスであり、０〜
0.4Kg／cm2の低圧で使用される。(Conventional technology) Tires used on sand, wet fields, etc., are able to flex sufficiently in order to run on left-handed, muddy surfaces, thereby obtaining a wide ground contact area, low ground pressure, and a large amount of buoyancy. need to get it. Therefore, this type of tire is cordless and tubeless, and from 0 to
Used at low pressure of 0.4Kg/cm 2 .
また、この種タイヤとして、牽引力（駆動力）
を得るため、実公昭57−5202号公報に開示されて
いるように、タイヤレツド部に高いラグを形成す
るとともに、該ラグの側端面に、タイヤの回転方
向に沿う幅挟い溝を径方向には小間隔に複数条形
成した低圧偏平タイヤがある（従来例の１）。 In addition, as this type of tire, the traction force (driving force)
In order to obtain this, as disclosed in Japanese Utility Model Publication No. 57-5202, a high lug is formed in the tire lead, and a width-spanning groove is radially formed along the rotational direction of the tire on the side end surface of the lug. There is a low-pressure flat tire in which a plurality of strips are formed at small intervals (conventional example 1).
また、タイヤの牽引力を増大する技術として
は、特開昭54−302号公報に開示されたものがあ
る（従来例の２）。 Further, as a technique for increasing the traction force of a tire, there is a technique disclosed in Japanese Patent Application Laid-Open No. 54-302 (Conventional Example 2).
この従来例の２は、第５図に示す如く、タイヤ
Ｔの左右サイドウオール部Ｓにのみ他部に比して
高いラグＬを形成し、接地底部を内側に凹曲し易
い形態としたものである。 In this conventional example 2, as shown in Fig. 5, lugs L are formed only on the left and right sidewall portions S of the tire T, which are higher than the other portions, and the bottom portion of the tire T is shaped to be easily concavely bent inward. It is.
（考案が解決しようとする課題）
しかしながら、従来例の１では、次の問題点が
ある。(Problems to be solved by the invention) However, the conventional example 1 has the following problems.
すなわち、タイヤは硬質路面すなわち、舗装路
を走行するときは路面上を走行するが、砂、泥等
を走行するときは砂、泥等の表土上を走行するの
ではなく、タイヤ接地圧（本機重量÷タイヤ本数
÷接地面積）と泥等の抵抗とが釣り合う泥中を走
行し、このとき、タイヤはそのサイドウオール部
まで泥中に入つており、トレツド部にのみラグを
形成するだけでは、牽引力を充分に発揮し得ると
は言い難いものであつた。 In other words, when driving on a hard road surface, i.e., a paved road, tires run on the road surface, but when driving on sand, mud, etc., they do not run on the surface soil of sand, mud, etc. When running in mud, where the machine weight ÷ number of tires ÷ ground contact area) and the resistance of mud etc. are balanced, the tires are immersed in the mud up to their sidewalls, so it is difficult to just form lugs on the tread area. However, it was difficult to say that the traction force could be sufficiently exerted.
また、従来の２はサイドウオール部Ｓのラグ、
即ちラグ側部Ｌを設けることによつて湿田等では
牽引力を得ると同時に、そのラグ側部Ｌを他部よ
り高くすることによりトレツド部の接地底部を凹
曲し、それにより接地面の土壌を掻き乱さないよ
うにしている。従つて、接地底部（トレツド部）
での牽引力の発生が無視され、且つ接地底部のラ
グによる牽引力の発生に多大なロスが生じるよう
になつている。また、ラグ側部が強固な支持部と
なつてタイヤのサイドウオール部Ｓの剛性を高め
るため、サイドウオール部の撓みは極めて少なく
なり、そのため接地面積の増大は望み難く、接地
圧の低下及び浮力の増大は期待し難い。 In addition, the conventional 2 is the lug of the sidewall part S,
That is, by providing the lug side part L, traction force is obtained in wet fields, etc., and at the same time, by making the lug side part L higher than other parts, the ground contact bottom of the tread part is concavely curved, thereby reducing the soil on the ground surface. I try not to disturb it. Therefore, the grounding bottom part (tread part)
The generation of traction force by the bottom lugs is ignored, and a large amount of traction force is generated by the lugs at the bottom of the ground. In addition, since the lug side portions serve as strong supports and increase the rigidity of the sidewall portion S of the tire, the deflection of the sidewall portion is extremely small, so it is difficult to expect an increase in the ground contact area, resulting in a decrease in ground pressure and buoyancy. It is difficult to expect an increase in
本考案は、かかる従来例の課題に鑑み、トレツ
ド部をサイドウオール部とにそれぞれラグを設け
て牽引力の増大を確保しつつサイドウオール部の
撓みを許容することで接地圧の低下及び浮力の増
大をともに約束した低圧タイヤを提供するのが目
的である。 In view of the problems of the conventional example, the present invention provides lugs on the tread portion and the sidewall portion, respectively, to ensure an increase in traction force while allowing the sidewall portion to flex, thereby reducing ground pressure and increasing buoyancy. The purpose is to provide low-pressure tires that promise the following.
（課題を解決するための手段）
本考案は、トレツド部３とサイドウオール部５
とにラグ７が形成された低圧タイヤにおいて、前
述の目的を達成するために、次の技術的手段を講
じている。(Means for solving the problem) The present invention has a tread portion 3 and a sidewall portion 5.
In order to achieve the above-mentioned object in the low-pressure tire in which the lugs 7 are formed, the following technical measures are taken.
すなわち、本考案は、前記ラグ７は、トレツド
部３上のラグ周部７Ａとサイドウオール部５上の
ラグ側部７Ｂとを、タイヤ断面視で略Ｌ形になる
ように一体に連設して成り、前記ラグ側部７Ｂに
は、タイヤ径方向の撓みを許容する撓み部１２形
成してあり、該撓み部１２は、タイヤ側面視で径
内側に屈曲部１１Ａを有するＶ形溝１１の複数を
径方向に間隔をもつて形成してなり、該Ｖ形溝１
１は径外側の溝幅よりも径内側の溝幅が広く形成
されていることを特徴とするものである。 That is, in the present invention, the lug 7 has a lug peripheral portion 7A on the tread portion 3 and a lug side portion 7B on the sidewall portion 5 that are integrally connected so as to form a substantially L-shape in cross-sectional view of the tire. The lug side portion 7B is formed with a bending portion 12 that allows bending in the tire radial direction. A plurality of V-shaped grooves 1 are formed at intervals in the radial direction.
1 is characterized in that the groove width on the radially inner side is wider than the groove width on the radially outer side.
（実施例と作用）
以下、図面を参照して本考案の実施例を詳述す
る。(Embodiments and Operations) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図から第３図に示す第１実施例において、
リム２に組込まれた扁平状低圧タイヤ１は、中央
のトレツド部３から左右にシヨルダ部４、サイド
ウオール部５及びビード部６ゴム等で一体成形さ
れており、その外周面にはラグ７が突設されてお
り、０〜0.4Kg／cm2の内圧で使用される。８はリ
ム２に設けられたバルブ、９はビード部６に巻か
れたビード補強体を夫々示している。 In the first embodiment shown in FIGS. 1 to 3,
A flat low-pressure tire 1 incorporated into a rim 2 is integrally molded with a shoulder part 4, a sidewall part 5, a bead part 6, rubber, etc. on the left and right from a central tread part 3, and has lugs 7 on its outer peripheral surface. It has a protruding structure and is used at an internal pressure of 0 to 0.4 Kg/cm 2 . Reference numeral 8 indicates a valve provided on the rim 2, and reference numeral 9 indicates a bead reinforcement body wound around the bead portion 6.
ラグ７はチ鳥状に配列された細長状ラグで、ト
レツド中心線１０からシヨルダ部４を通つてサイ
ドウオール部５の端部、ビード部６の近傍まで形
成されており、トレツド部３に対応したラグ周部
７Ａとサイドウオール部５に対応したラグ側部７
Ｂとを有していて、ラグ周部７Ａとラグ側部７Ｂ
とはタイヤ断面視で略Ｌ形となるように一体に連
接してなる。 The lugs 7 are elongated lugs arranged in a zigzag pattern, and are formed from the tread center line 10 through the shoulder portion 4 to the end of the sidewall portion 5 and near the bead portion 6, and correspond to the tread portion 3. The lug peripheral portion 7A and the lug side portion 7 corresponding to the sidewall portion 5
B, and has a lug peripheral portion 7A and a lug side portion 7B.
are integrally connected to form a substantially L-shape in cross-sectional view of the tire.
ラグ周部７Ａはトレツド部３の肉厚の２倍以上
の高さを有しているのに対し、ラグ側部７Ｂはサ
イドウオール部５の肉厚と同程度の高さであり、
このラグ側部７Ｂはビード部６側へいくに従つて
低くなつていて、外面７Ｃはトレツド中心線１０
側へ傾斜している。 The lug peripheral portion 7A has a height that is more than twice the wall thickness of the tread portion 3, whereas the lug side portion 7B has a height that is approximately the same as the wall thickness of the sidewall portion 5.
This lug side part 7B becomes lower as it goes toward the bead part 6 side, and the outer surface 7C is at the tread center line 10.
tilted to the side.
ラグ側部７Ｂの外面７Ｃには、タイヤ径方向の
撓みを許容する撓み部１２が形成してあり、該撓
み部１２は、タイヤ側面視で径内側に屈曲部１１
Ａを有する複数のＶ形溝１１を径方向に間隔をも
つて本実施例では３個形成してなり、Ｖ形溝１１
は径外側の溝幅よりも径内側の溝幅が広く形成さ
れている。 A bending part 12 that allows bending in the tire radial direction is formed on the outer surface 7C of the lug side part 7B.
In this embodiment, a plurality of V-shaped grooves 11 having A are formed at intervals in the radial direction, three in number.
The groove width on the radially inner side is wider than the groove width on the radially outer side.
Ｖ形溝１１はタイヤ１が第３図に示す如くサイ
ドウオール部５まで泥中に入つて回転しても、
砂、泥等の通過をできるだけ阻止し、ラグ側部７
Ｂによる牽引力を充分を確保する。 The V-shaped groove 11 allows the tire 1 to rotate even if it gets into the mud up to the sidewall part 5 as shown in FIG.
Prevent the passage of sand, mud, etc. as much as possible, and
Ensure sufficient traction force by B.
また、複数条のＶ形溝１１を形成し、その溝幅
を径外側より径内側が広くされ、かつ、屈曲部１
１Ａがタイヤ側面視で径内側にあることから、ラ
グ側部７Ｂはサイドウオール部５の剛性を高める
こなく、タイヤ１が径方向及び幅方向に変形して
も、Ｖ形溝１１拡縮してその変形に従う。即ち、
複数条のＶ形溝１１はラグ側部７Ｂのタイヤ径方
向の撓みを許容する撓み部１２となつてお、タイ
ヤ１はラグ側部７Ｂを形成しても、ラグ側部７Ｂ
がないものと同様な撓みを生じることができ、ラ
グ側部７Ｂはタイヤの変形に悪影響を与えること
なく、牽引力を発揮することできる。また、路上
走行時においても、タイヤが充分に撓むので、振
動は少ない。 In addition, a plurality of V-shaped grooves 11 are formed, and the groove width is wider on the radially inner side than on the radially outer side, and the bent portion 1
1A is on the radially inner side when viewed from the side of the tire, the lug side portions 7B do not increase the rigidity of the sidewall portion 5, and even if the tire 1 is deformed in the radial and width directions, the V-shaped groove 11 expands and contracts. Follow that transformation. That is,
The plurality of V-shaped grooves 11 serve as flexible portions 12 that allow the lug side portions 7B to deflect in the tire radial direction.
The lug side portion 7B can exert traction force without adversely affecting the deformation of the tire. Furthermore, even when driving on the road, the tires are sufficiently deflected, so there is little vibration.
なお、Ｖ形溝１１は第１図および第３図で示す
如く、溝深さは径外側より径内側につれて浅くさ
れている。 Note that, as shown in FIGS. 1 and 3, the V-shaped groove 11 has a groove depth that becomes shallower from the radially outer side toward the radially inner side.
第４図は本考案の第２実施例を示しており、ラ
グ側部７Ｂの外面７Ｃは、トレツド中心線１０を
略平行とされていて、その他は前述した第１実施
例と同じである。 FIG. 4 shows a second embodiment of the present invention, in which the outer surface 7C of the lug side 7B is substantially parallel to the tread centerline 10, and other aspects are the same as in the first embodiment described above.
（考案の効果）
本考案は以上の通りであり、本考案によれば、
ラグ７は、トレツド部３上のラグ周部７Ａとサイ
ドウオール部５上のラグ側部７Ｂとを、タイヤ断
面視で略Ｌ形になるように一体に連設しているの
で、ラグ周部７Ａとラグ側部７Ｂとが相互に協働
して補強しあうこととなつて、ラグ７そのものの
変形は少なく、従つて、タイヤ１がサイドウオー
ル部５までも泥中に侵入して走行しているときで
も、充分な牽引力を確保することができる。(Effects of the invention) The invention is as described above, and according to the invention,
In the lug 7, the lug peripheral part 7A on the tread part 3 and the lug side part 7B on the sidewall part 5 are integrally connected in a substantially L-shape when viewed in cross section of the tire. Since the lug side parts 7A and the lug side parts 7B cooperate with each other to reinforce each other, the deformation of the lug 7 itself is small, and therefore, the tire 1 can penetrate into the mud even to the sidewall parts 5 when running. Sufficient traction force can be ensured even when
また、前記ラグ部７Ｂには、タイヤ径方向の撓
みを許容する撓み部１２が形成してあり、該撓み
部１２は、タイヤ側面視で径内側に屈曲部１１Ａ
を有するＶ形溝１１の複数を径方向に間隔をもつ
て形成してあるので、サイドウオール部５にラグ
側部７Ｂを形成して牽引力の増強を図つたにも拘
わらず、サイドウオール部５の剛性を極度に高め
ることがなく、該サイドウオール部５の径方向撓
みを許して広い接地面積を得ることとなり、充分
な浮力を確保して湿田性能が向上する。 Further, the lug portion 7B is formed with a bending portion 12 that allows bending in the tire radial direction, and the bending portion 12 is formed with a bent portion 11A on the radially inner side when viewed from the side of the tire.
Since a plurality of V-shaped grooves 11 are formed at intervals in the radial direction, the sidewall portion 5 The sidewall portion 5 is allowed to bend in the radial direction without increasing the rigidity of the sidewall to an extreme extent, thereby obtaining a wide ground contact area, ensuring sufficient buoyancy and improving wet field performance.
複数のＶ形溝１１よりなる撓み部１２は、タイ
ヤ側面視で径内側に屈曲部１１Ａを有するＶ形溝
１１で構成したことにより、径方向の撓みが良好
となるし、また、Ｖ形溝１１の溝幅が径内側の方
が径外側より広くしてあるから、撓み部１２は径
方向によく撓みより一層良好となる。 The flexible portion 12 made up of a plurality of V-shaped grooves 11 is configured with the V-shaped groove 11 having the bent portion 11A on the radially inner side when viewed from the side of the tire, so that the deflection in the radial direction is good. Since the groove width of the groove 11 is wider on the radially inner side than on the radially outer side, the flexible portion 12 is even more flexible in the radial direction.
第１図は本考案の第１実施例を示すタイヤ径方
向の断面図、第２図は一部展開平面図、第３図は
使用状態の断面図、第４図は第２実施例の断面
図、第５図は従来例の使用状態断面図である。
１……低圧タイヤ、３……トレツド部、５……
サイドウオール部、７……ラグ、７Ａ……ラグ周
部、７Ｂ……ラグ側部、１１……Ｖ形溝、１１Ａ
……屈曲部、１２……撓み部。
Fig. 1 is a radial cross-sectional view of the tire showing the first embodiment of the present invention, Fig. 2 is a partially developed plan view, Fig. 3 is a cross-sectional view of the used state, and Fig. 4 is a cross-section of the second embodiment. 5 are sectional views of the conventional example in use. 1...Low pressure tire, 3...Tread section, 5...
Sidewall part, 7... Lug, 7A... Lug circumference, 7B... Lug side part, 11... V-shaped groove, 11A
...Bending part, 12...Bending part.
Claims (1)
が形成された低圧タイヤにおいて、 前記ラグ７は、トレツド部３上のラグ周部７Ａ
とサイドウオール部５上のラグ側部７Ｂとを、タ
イヤ断面視で略Ｌ形になるように一体に連設して
成り、前記ラグ側部７Ｂには、タイヤ径方向の撓
みを許容する撓み部１２が形成してあり、該撓み
部１２は、タイヤ側面視で径内側に屈曲部１１Ａ
を有するＶ形溝１１の複数を径方向に間隔をもつ
て形成してなり、該Ｖ形溝１１は径外側の溝幅よ
りも径内側の溝幅が広く形成されていることを特
徴とする低圧タイヤ。[Claims for Utility Model Registration] Lug 7 on tread portion 3 and sidewall portion 5
In a low-pressure tire formed with
and a lug side part 7B on the sidewall part 5 are integrally arranged so as to form a substantially L shape in cross-sectional view of the tire, and the lug side part 7B has a flexure that allows for flexure in the tire radial direction. The flexible portion 12 has a bent portion 11A on the radially inner side when viewed from the side of the tire.
A plurality of V-shaped grooves 11 are formed at intervals in the radial direction, and the V-shaped grooves 11 are characterized in that the groove width on the radially inner side is wider than the groove width on the radially outer side. low pressure tires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15373684U JPH027043Y2 (en) | 1984-10-11 | 1984-10-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15373684U JPH027043Y2 (en) | 1984-10-11 | 1984-10-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168906U JPS6168906U (en) | 1986-05-12 |
| JPH027043Y2 true JPH027043Y2 (en) | 1990-02-20 |
Family
ID=30711748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15373684U Expired JPH027043Y2 (en) | 1984-10-11 | 1984-10-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027043Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2918241B2 (en) * | 1989-06-27 | 1999-07-12 | オーツタイヤ株式会社 | Multipurpose lug tires |
-
1984
- 1984-10-11 JP JP15373684U patent/JPH027043Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168906U (en) | 1986-05-12 |
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