JP2004347060A - Fastening band - Google Patents

Fastening band Download PDF

Info

Publication number
JP2004347060A
JP2004347060A JP2003146456A JP2003146456A JP2004347060A JP 2004347060 A JP2004347060 A JP 2004347060A JP 2003146456 A JP2003146456 A JP 2003146456A JP 2003146456 A JP2003146456 A JP 2003146456A JP 2004347060 A JP2004347060 A JP 2004347060A
Authority
JP
Japan
Prior art keywords
band
tightening
claws
tightened
force
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.)
Withdrawn
Application number
JP2003146456A
Other languages
Japanese (ja)
Inventor
Motohiko Okada
元彦 岡田
Minoru Ishijima
実 石島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2003146456A priority Critical patent/JP2004347060A/en
Publication of JP2004347060A publication Critical patent/JP2004347060A/en
Withdrawn legal-status Critical Current

Links

Images

Landscapes

  • Clamps And Clips (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening band capable of obtaining large fastening force in addition to a sufficient function for restricting unevenness of fastening force due to a manufacture error of a member to be fastened and the fastening member, and facilitate practical use thereof by improving fixing strength and sealing ability of the body to be fastened. <P>SOLUTION: In this fastening band 11, one end 12a of a metal band body 12 is formed with claws 13a and 13b, and the other end thereof is formed with holes 14a and 14 or claws 19a and 19b. The band body 12 is shrunken into a ring shape by giving fastening force to overlap both ends 12a and 12b with each other. In this condition, the claws 13a and 13b and the holes 14a and 14b or the claws 19a and 19b are engaged with each other to fasten the member to be fastened to a counter member for fixation. An elastic deforming part 16a and a plastic deforming part 17a to be deformed by the force to be applied in the circumferential direction of the band body 12 are arranged in parallel with each other in the cross direction of the band body 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、例えば自動車や各種産業機械などの構成部品である被締付け部材を相手部材に円環状の帯状体で締付け固定する締付けバンドに関する。
【0002】
【従来の技術】
例えばゴムや合成樹脂などの可撓性弾性体からなる防塵用ベローズ、軸継手用ブーツ等の被覆体や流体給送用ホースなどの被締付け部材を、それに対応する軸、継手、管などの相手部材に固定するため、その相手部材に装着された被締付け部材を円環状の帯状体で抱持してその締付け力の作用により固定する締付けバンドが使用されている。
【0003】
一般的に、前述の締付けバンド1は、図6(a)(b)に示すように金属製の帯状体2の一端部2aに爪3a,3bを形成すると共にその他端部2bに孔4a,4bを形成し、前記帯状体2を円環状に縮径させてその両端部2a,2bを重合させた状態で前記爪3a,3bと孔4a,4bを係合させることより、被締付け部材を相手部材に締付け状態で保持している。また、孔4a,4b以外に、図7(a)に示すような形態の爪9a,9bを形成し、爪3a,3bと係合させてもよい。
【0004】
前述の帯状体2の両端部2a,2bに形成された爪3a,3bと孔4a,4bは、円周方向二箇所に設けられている。また、重ね合わされた両端部2a,2bにそれぞれ突起5a,5bを設け、周方向に位置ずれした二つの突起5a,5bを工具などを利用することにより周方向に相互に近接させるように締付け操作力を付与することで、孔4a,4bまたは爪9a,9bに爪3a,3bを係合させるようにしている。
【0005】
なお、帯状体2の両端部2a,2bを重合させた状態で、内側に位置する一端部2aの幅方向中央部分に突起5aを形成し、外側に位置する他端部2bに形成された長孔状の孔4bから前述の一端部2aの突起5aを露呈させることにより、両端部2a,2bに形成された突起5a,5bを操作可能な状態に配置している。
【0006】
この締付けバンド1において、爪3a,3bと孔4a,4bまたは爪9a,9bとの係合状態が容易に解除されないような構造とするためには、図6(c)に示すように爪3a,3bと孔4a,4bまたは爪9a,9bとの周方向の係合代tが必要となる。このような構造とすることにより、帯状体2の締付け時には、一時的に、最終的な締付け保持状態よりも帯状体2をさらに縮径させた状態で、爪3a,3bを孔4a,4bまたは爪9a,9bに挿入して両者を係合させている。
【0007】
ここで、締付けバンド1の最終的な締付け保持状態で発生する締付け力が、被締付け部材の固定強度および密閉性を左右する要因となっている。この締付け保持状態において大きな締付け力を安定して得るためには、以下に示す▲1▼〜▲3▼の要件が必要である。
▲1▼被締付け部材における締付け部の外径寸法、および締付けバンドにおける締付け時内径寸法に関わる部位の製造誤差が小さいこと(締付け保持状態における締付けバンドによる被締付け部材への締め代が一定であること)
▲2▼締付けバンドを締め付けるための工具などにより締付け操作力が作用する突起の強度が十分であること(大きな操作力を加えても破損しないこと)
▲3▼帯状体の両端部が係合する爪と孔または爪と爪、およびその周辺部位で、円周方向に作用する力に対する剛性が十分であること
【0008】
前述した▲1▼については、実用上、締付けバンドおよび被締付け部材の製造上の容易性または安定性を確保するために必要な製造誤差により、締め代にばらつきが生じる。その場合、各部品の製造誤差による締め代が最小のものに対して、所望の固定強度および密閉性を得るように寸法設定されている締付けバンドにおいては、製造誤差による締め代が最大のものを締め付けようとした場合、被締付け部材をさらに縮径させるか、あるいは締付けバンド自体を円周方向に伸ばして帯状体の長さを調整する必要がある。
【0009】
この問題を解消するため、特許文献1に開示されるような構造のものがある。この特許文献1では、クランプバンド構造体において、ホースとニップルの全公差範囲のための公差保証手段として、クランプバンドから打ち抜かれたスロット状開口を形成し、スロット状開口の両側に残された側方バンド部分が特定されたクランプ力で公差保証を与えるような幅と長さを有するものが開示されている。
【0010】
すなわち、この特許文献1では、締付けバンドの帯状体の一部に抜き穴加工を施して締付け力により伸びる(塑性変形する)ようにし、被締付け部材における締付け部の外径寸法にばらつきがある場合でも、締付け力のばらつきを抑制することができるようにしている。
【0011】
【特許文献1】
特開平8−170773号公報
【0012】
【発明が解決しようとする課題】
ところで、前述した特許文献1に開示されたような締付けバンドの場合、抜き穴加工を施した部分の引張り強度が低下するため、所要の締付け力を得る以前に抜き穴加工部分が過度に伸びたり、その最弱部に伸びが集中して破断に至る場合があったり、あるいは引張り強度の高い高価な材料を必要とするなど、締付けバンドを実用化する上で問題があった。
【0013】
前述した特許文献1以外の他の手段として、締付けバンドの帯状体に、その円周方向の力に対して伸縮するばね作用部を設けた構造のものがある(例えば、特開平8−170774号公報、特開平9−310792号公報、特開平7−119720号公報、実開平6−43481号公報、実開平6−28478号公報)。このようにばね作用部を設けたことにより締付けバンドが円周方向に伸縮することで前述した締付け力のばらつきを抑制するようにしている。
【0014】
しかしながら、このようにばね作用部を設けた締付けバンドの場合、そのばね作用部による締付け力は、周方向の力に対するばね作用部のばね定数によって決まる。このばね作用部を素材から一体にプレス成形する構造のものでは、ばね定数を大きくすることが困難であり、大きな締付け力を得ることが難しいという問題があった。
【0015】
そこで、本発明は前記問題点に鑑みて提案されたもので、その目的とするところは、被締付け部材および締付けバンドの製造誤差による締付け力のばらつきを抑制する機能を十分に備えた上で大きな締付け力を得ることができ、被締付け部材の固定強度および密閉性を改善し、実用化を容易にし得る締め付けバンドを提供することにある。
【0016】
【課題を解決するための手段】
前記目的を達成するための技術的手段として、本発明は、金属製帯状体の一端部に爪を形成すると共にその他端部に孔または爪を形成し、前記帯状体を締付け操作力の付与により円環状に縮径させてその両端部を重合させた状態で前記爪と孔または爪と爪を係合させることにより、被締付け部材を相手部材に締付け固定する締付けバンドであって、前記帯状体の円周方向に作用する力に対する弾性変形部と塑性変形部を帯状体の幅方向に並列に配設したことを特徴とする。
【0017】
この締付けバンドでは、弾性変形部と塑性変形部を並列に配設したことにより、弾性変形部のみで構成した場合よりも、円周方向の力に対する剛性が大きくなり、被締付け部材および締付けバンドの製造誤差による締め代のばらつきを抑制する機能を発揮し、高い締付け力が得られる。また、塑性変形部のみで構成した場合よりも、その塑性変形部に引張り力が作用したときに、塑性変形部は応力が均一に分散しながら伸ばされるため、破断に至るまでの伸びを長くすることができる。
【0018】
本発明では、前記弾性変形部と塑性変形部を帯状体の円周方向に沿って列状に形成した構成とすることが可能であり、前記帯状体の幅方向に二列の弾性変形部を設け、その弾性変形部間に一列の塑性変形部を介在させた構造とするか、逆に前記帯状体の幅方向に二列の塑性変形部を設け、その塑性変形部間に一列の弾性変形部を介在させた構造が可能である。さらに、前記帯状体の幅方向に弾性変形部と塑性変形部を一列ずつ設けた構造も可能である。なお、本発明の締付けバンドは、前記相手部材が自在継手であり、かつ、被締付け部材が前記自在継手の端部に装着されるブーツである場合に適用可能である。
【0019】
【発明の実施の形態】
本発明に係る締付けバンドの実施形態を以下に詳述する。本発明は、自動車の自在継手を相手部材とし、その自在継手の端部に装着されるブーツを被締付け部材として、自在継手の端部にブーツを締付けバンドで締付け固定する実施形態や、その他の実施形態として、例えばゴムや合成樹脂などの可撓性弾性体からなる防塵用ベローズ等の被覆体や流体給送用ホースなどの被締付け部材を、それに対応する軸、管などの相手部材に固定する場合にも適用可能である。
【0020】
図1乃至図5は第一から第五の実施形態で、各図(a)は締付けバンドの正面図、(b)は(a)の側面図、(c)は(a)のA〜E部の拡大斜視図である。第一から第五の各実施形態の締付けバンド11は、金属製の帯状体12の一端部12aに爪13a,13bを形成すると共にその他端部12bに孔14a,14bを形成し、前記帯状体12を円環状に縮径させてその両端部12a,12bを重合させた状態で前記爪13a,13bと孔14a,14bを係合させることより、被締付け部材を相手部材に締付け状態で保持する。
【0021】
孔14a,14bは、図6に示す孔4a,4bと同じ形態であり、孔14a,14b以外に、図7(a)に示す爪9a,9bと同様の形態の爪19a,19bを形成し、爪13a,13bと係合させるか、図7(b)に示す爪3a,3bおよび爪9a,9bとそれぞれ同様の形態の爪13a,13bおよび爪19a,19bを形成して、互いに係合させてもよい。
【0022】
前述の帯状体12の両端部12a,12bに形成された爪13a,13bと孔14a,14bは、円周方向二箇所に設けられている。また、重ね合わされた両端部12a,12bにそれぞれ突起15a,15bを設け、周方向に位置ずれした二つの突起15a,15bを工具などを利用することにより周方向に相互に近接させるように締付け操作力を付与することで、孔14a,14bまたは爪19a,19bに爪13a,13bを係合させるようにしている。
【0023】
なお、帯状体12の両端部12a,12bを重合させた状態で、内側に位置する一端部12aの幅方向中央部分に突起15aを形成し、外側に位置する他端部12bに形成された長孔状の孔14bから前述の一端部12aの突起15bを露呈させることにより、両端部12a,12bに形成された突起15a,15bを操作可能な状態に配置している。
【0024】
突起15a,15bと同じ機能を持つ構造と、締付け操作を行なうための工具などの先端部分の形態として、図8に示す突起15c,15dと操作部18c,18d、図9に示す突起15e,15fと先端部18e,18f、図10に示す孔15g,15hと操作部18g,18hを例として示す。
【0025】
突起15bと同様に、突起15dおよび15fは内側に位置する一端部12aの幅方向中央部分に形成され、外側に位置する他端部12bに形成された長孔状の孔14bから露出する形態となっている。突起15a,15c,15eが、他端部12bの最端部に位置し、突起15b,15d,15fの外側周辺に他端部12bが存在しない構造である場合は、突起15b,15d,15fは露呈しており、長孔14bから露呈する形態は必要なくなる。
【0026】
また、孔15hは内側に位置する一端部12aの幅方向中央部分に形成され、外側に位置する他端部12bに形成された長孔状の孔14bから、工具などの先端部分を挿入し、孔15hに適合する形状の先端突起18kを係合させ、同様に先端突起18jを係合させた孔15gと共に、締付け操作を行なう形態である。孔15hが、他端部12bの最端部に位置し、孔15gの外側周辺に他端部12bが存在しない構造である場合は、孔15gは露呈しており、長孔14bから工具などの先端部分を挿入する形態は必要なくなる。
【0027】
まず、第一の実施形態の締付けバンド11では、図1(a)〜(c)に示すように帯状体12の円周方向に作用する力に対して弾性変形する二列の弾性変形部16aと塑性変形する一列の塑性変形部17aを帯状体12の幅方向に並列に配設した構造を具備する。弾性変形部16aは、帯状体12の両側を円周方向に沿ってプレス加工により波状に切り起こした形状を有する。一方、塑性変形部17aは、二列の弾性変形部16aを前述のように形成することにより、それら二列の弾性変形部16aの間に一列で残存した形状となる。
【0028】
第二の実施形態の締付けバンド11は、図2(a)〜(c)に示すように一列の弾性変形部16bと二列の塑性変形部17bを並列に配設した構造を具備する。弾性変形部16bは、帯状体12の中央部を円周方向に沿ってプレス加工により瘤状に切り起こした形状を有する。一方、塑性変形部17bは、一列の弾性変形部16bを前述のように形成することにより、その一列の弾性変形部16bの両側に二列で残存した形状となる。
【0029】
第三の実施形態の締付けバンド11は、図3(a)〜(c)に示すように一列の弾性変形部16cと一列の塑性変形部17cを並列に配設した構造を具備する。弾性変形部16cは、第二の実施形態と同一形状、つまり、帯状体12の幅方向片側を円周方向に沿ってプレス加工により瘤状に切り起こした形状を有する。一方、塑性変形部17cは、一列の弾性変形部16cを前述のように形成することにより、その一列の弾性変形部16cの片側に一列で残存した形状となる。
【0030】
第四の実施形態の締付けバンド11は、第一の実施形態の場合と同様、図4(a)〜(c)に示すように二列の弾性変形部16dと一列の塑性変形部17dを並列に配設した構造を具備する。弾性変形部16dは、帯状体12の両側を円周方向に沿ってプレス加工により鋸歯状に成形した形状を有する。一方、塑性変形部17dは、二列の弾性変形部16dを前述のように形成することにより、それら二列の弾性変形部16dの間に一列で残存した形状となる。
【0031】
第五の実施形態の締付けバンド11は、第二の実施形態の場合と同様、図5(a)〜(c)に示すように一列の弾性変形部16eと二列の塑性変形部17eを並列に配設した構造を具備する。弾性変形部16eは、帯状体12の中央部を円周方向に沿ってプレス加工により角錐状に成形した形状を有する。一方、塑性変形部17eは、一列の弾性変形部16eを前述のように形成することにより、その一列の弾性変形部16eの両側に二列で残存した形状となる。必要に応じて、図5(d)(e)に示すような、周方向に配置したスリット20を弾性変形部16eに設けてもよい。
【0032】
以上で説明した第一から第五の各実施形態の締付けバンド11では、その円周方向に沿ってほぼ半円程度の周寸法で形成されている。これは、被締付け体が必要とする締付け力を与え、且つ被締付け体の製造誤差による最大の伸び代においても、塑性変形部17eが破断することがないように、弾性変形部16eおよび塑性変形部17eを構成する周寸法を設定するものであり、締付けバンド11を適用する被締付け体の条件により異なる。
【0033】
この締付けバンド11の組み付け時、重ね合わされた帯状体12の両端部12a,12bの二つの突起15a,15bを工具などを利用することにより周方向に相互に近接させるように締付け操作力を付与することで、一時的に、最終的な締付け保持状態よりも帯状体12をさらに縮径させた状態で、爪13a,13bを孔14a,14bに挿入して両者を係合させるか、爪13a,13bを爪19a,19bと係合させている。
【0034】
締付けバンド11の組み付け時に作用する締付け操作力により塑性変形部17a〜17eは破断しない範囲で塑性変形領域まで周方向に伸ばされ、並列に配設された弾性変形部16a〜16eも同量伸ばされた状態となる。この時、弾性変形部16a〜16eに発生する収縮力は、その構造および寸法と、材料特性によって決定される。前述した実施形態のように弾性変形部16a〜16eとして構成される部分のばね定数は、塑性変形部17a〜17eの剛性に比べてかなり小さくなる。
【0035】
これにより、弾性変形部16a〜16eのみで構成した場合よりも、円周方向の力に対する剛性が大きくなり、被締付け部材および締付けバンドの製造誤差による締め代のばらつきを抑制する機能を発揮し、高い締付け力が得られる。
【0036】
また、抜き穴加工などの塑性変形部のみで構成した場合では、その塑性変形部に引張り力が作用したときに、材料欠陥や形状要因により生じた最弱部に伸びが集中し、小さい伸び代で破断に至る。しかしながら、前述の実施形態では、ある部分の塑性変形部17a〜17eが他の部分より大きく伸ばされた場合、並列に配設された弾性変形部16a〜16eも伸ばされてその部分の剛性が他の部分より増加するため、特定の最弱部に伸びが集中することはない。すなわち、塑性変形部17a〜17eは応力が均一に分散しながら伸ばされるため、塑性変形部のみを設けた構造よりも、破断に至るまでの伸びを長くすることができる。
【0037】
【発明の効果】
この締付けバンドでは、弾性変形部と塑性変形部を並列に配設したことにより、弾性変形部のみで構成した場合よりも、円周方向の力に対する剛性が大きくなり、被締付け部材および締付けバンドの製造誤差による締め代のばらつきを抑制する機能を発揮し、高い締付け力が得られる。また、塑性変形部のみで構成した場合よりも、その塑性変形部に引張り力が作用したときに、塑性変形部は応力が均一に分散しながら伸ばされるため、破断に至るまでの伸びを長くすることができる。
【0038】
その結果、被締付け部材および締付けバンドの製造誤差による締付け力のばらつきを抑制する機能を十分に備えた上で大きな締付け力を得ることができ、被締付け部材の固定強度および密閉性を改善することができ、締付けバンドの実用化が容易に図れる。
【図面の簡単な説明】
【図1】(a)は第一の実施形態における締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)のA部の拡大斜視図である。
【図2】(a)は第二の実施形態における締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)のB部の拡大斜視図である。
【図3】(a)は第三の実施形態における締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)のC部の拡大斜視図である。
【図4】(a)は第四の実施形態における締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)のD部の拡大斜視図である。
【図5】(a)は第五の実施形態における締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)のE部の拡大斜視図、(d)は(b)のスリットを設けた図、(e)は(c)のスリットを設けた図である。
【図6】(a)は一般的な締付けバンドを示す正面図、(b)は(a)の側面図、(c)は(a)の要部拡大断面図である。
【図7】(a)(b)はバンド端の重合部分の、爪と爪による係合方式を示す図である。
【図8】締付け操作用の突起と、工具などの先端形態を示す図である。
【図9】締付け操作用の突起と、工具などの先端形態を示す図である。
【図10】締付け操作用の突起と、工具などの先端形態を示す図である。
【符号の説明】
11 締付けバンド
12 帯状体
13a,13b 爪
14a,14b 孔
15a〜15h 締付け操作用突起または孔
16a〜16e 弾性変形部
17a〜17e 塑性変形部
18c〜18h 締付け操作を行なう工具などの先端部
19a,19b 爪
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tightening band for tightening and fixing a member to be tightened, which is a component of an automobile or various industrial machines, to a counterpart member with an annular band.
[0002]
[Prior art]
For example, a member to be tightened such as a dust-proof bellows made of a flexible elastic material such as rubber or synthetic resin, a boot such as a boot for a shaft coupling, or a member to be tightened such as a hose for fluid feeding is mated to a shaft, a joint or a tube corresponding thereto. In order to fix the member to the member, a tightening band is used which holds the member to be tightened attached to the mating member with an annular band and fixes the member by the action of the tightening force.
[0003]
In general, the above-described tightening band 1 has claws 3a, 3b formed at one end 2a of a metal band 2 and holes 4a, 3b formed at the other end 2b, as shown in FIGS. 6 (a) and 6 (b). 4b, the strip 2 is reduced in diameter in an annular shape, and the claws 3a, 3b are engaged with the holes 4a, 4b in a state where both ends 2a, 2b are overlapped. It is held in a tightened state on the mating member. Further, in addition to the holes 4a and 4b, claws 9a and 9b having a form as shown in FIG. 7A may be formed and engaged with the claws 3a and 3b.
[0004]
Claws 3a, 3b and holes 4a, 4b formed at both ends 2a, 2b of the above-mentioned strip 2 are provided at two locations in the circumferential direction. Also, projections 5a, 5b are provided on both end portions 2a, 2b which are overlapped with each other, and the two projections 5a, 5b which are displaced in the circumferential direction are tightened so as to be close to each other in the circumferential direction by using a tool or the like. By applying a force, the claws 3a, 3b are engaged with the holes 4a, 4b or the claws 9a, 9b.
[0005]
In a state where both ends 2a and 2b of the strip 2 are superimposed, a protrusion 5a is formed at the center in the width direction of the one end 2a located inside, and a length formed at the other end 2b located outside. By exposing the above-mentioned protrusion 5a at one end 2a from the hole 4b, the protrusions 5a and 5b formed at both ends 2a and 2b are arranged in an operable state.
[0006]
As shown in FIG. 6 (c), in order to make the structure in which the engagement between the claws 3a, 3b and the holes 4a, 4b or the claws 9a, 9b is not easily released in the tightening band 1, the claws 3a as shown in FIG. , 3b and holes 4a, 4b or claws 9a, 9b in the circumferential direction. With such a structure, when the band 2 is fastened, the claws 3a, 3b are temporarily inserted into the holes 4a, 4b or Both are inserted into the claws 9a and 9b to engage with each other.
[0007]
Here, the tightening force generated in the final tightening holding state of the tightening band 1 is a factor that affects the fixing strength and the sealing performance of the member to be tightened. In order to stably obtain a large tightening force in the tightened holding state, the following requirements (1) to (3) are required.
{Circle around (1)} The manufacturing error of a portion related to the outer diameter of the tightening portion of the member to be tightened and the inner diameter of the tightening band at the time of tightening is small (the tightening band to the member to be tightened by the tightening band in the tightened holding state is constant. thing)
(2) The strength of the projection on which the tightening operation force is applied by a tool or the like for tightening the tightening band must be sufficient (not to be damaged even if a large operation force is applied).
{Circle around (3)} The claw and hole or the claw and claw with which both ends of the band are engaged, and the surrounding area thereof, have sufficient rigidity against the force acting in the circumferential direction.
Regarding the above item (1), in practice, there is a variation in the interference due to a manufacturing error necessary for securing ease or stability in manufacturing the tightening band and the member to be tightened. In such a case, the tightening band that is dimensioned to obtain the desired fixing strength and sealing performance should be the one with the largest interference due to manufacturing errors, while the one with the least interference due to manufacturing errors in each part. In the case of tightening, it is necessary to further reduce the diameter of the member to be tightened, or to extend the tightening band itself in the circumferential direction to adjust the length of the band-shaped body.
[0009]
In order to solve this problem, there is a structure as disclosed in Patent Document 1. In this Patent Document 1, in a clamp band structure, a slot-shaped opening punched out from a clamp band is formed as a tolerance assurance means for the entire tolerance range of a hose and a nipple, and a side left on both sides of the slot-shaped opening. It is disclosed that the side band portion has a width and length to provide a tolerance guarantee with a specified clamping force.
[0010]
That is, in this Patent Document 1, a part of the band-shaped body of the tightening band is subjected to a punching process so as to be expanded (plastically deformed) by the tightening force, and there is a variation in the outer diameter of the tightened portion of the member to be tightened. However, variations in the tightening force can be suppressed.
[0011]
[Patent Document 1]
JP-A-8-170773
[Problems to be solved by the invention]
By the way, in the case of the tightening band disclosed in the above-mentioned Patent Document 1, since the tensile strength of the portion subjected to the punching decreases, the punched portion may be excessively elongated before the required tightening force is obtained. However, there is a problem in practical use of the tightening band, for example, the elongation is concentrated at the weakest portion and breakage occurs, or an expensive material having high tensile strength is required.
[0013]
As another means other than the above-mentioned Patent Document 1, there is a structure in which a spring action portion which expands and contracts with respect to a force in a circumferential direction is provided on a band-shaped body of a tightening band (for example, Japanese Patent Application Laid-Open No. 8-170774). JP-A-9-310792, JP-A-7-119720, JP-A-6-43481, JP-A-6-28478. By providing the spring acting portion in this way, the tightening band expands and contracts in the circumferential direction, thereby suppressing the above-described variation in the tightening force.
[0014]
However, in the case of such a tightening band provided with the spring action portion, the tightening force of the spring action portion is determined by the spring constant of the spring action portion with respect to the circumferential force. In the structure in which the spring action portion is integrally formed by pressing from a material, it is difficult to increase the spring constant, and it is difficult to obtain a large tightening force.
[0015]
Therefore, the present invention has been proposed in view of the above-described problems, and has as its object to provide a sufficiently large function with a function of suppressing variations in tightening force due to manufacturing errors of a member to be tightened and a tightening band. An object of the present invention is to provide a tightening band capable of obtaining a tightening force, improving the fixing strength and sealing property of a member to be tightened, and facilitating practical application.
[0016]
[Means for Solving the Problems]
As a technical means for achieving the object, the present invention forms a claw at one end of a metal band and forms a hole or a claw at the other end, and applies a tightening operation force to the band. A tightening band for tightening and fixing a member to be tightened to a counterpart member by engaging the claw with a hole or a claw and a claw in a state in which both ends are overlapped while being reduced in an annular shape, wherein the band-shaped body is provided. The elastically deformable portion and the plastically deformable portion for the force acting in the circumferential direction are arranged in parallel in the width direction of the strip.
[0017]
In this tightening band, the elastic deformation portion and the plastic deformation portion are arranged in parallel, so that the rigidity with respect to the force in the circumferential direction is greater than when the elastic deformation portion alone is used. It exerts the function of suppressing variations in the interference due to manufacturing errors, and a high tightening force can be obtained. In addition, when a tensile force is applied to the plastically deformed portion, the plastically deformed portion is stretched while the stress is uniformly dispersed, so that the elongation to break is lengthened. be able to.
[0018]
In the present invention, the elastically deformable portion and the plastically deformable portion may be formed in a row along the circumferential direction of the band, and two rows of elastically deformable portions may be formed in the width direction of the band. Or a structure in which a single row of plastically deformed parts is interposed between the elastically deformable parts, or conversely, two rows of plastically deformable parts are provided in the width direction of the band, and a single row of elastically deformable parts is formed between the plastically deformable parts. A structure in which a part is interposed is possible. Further, a structure in which an elastically deformable portion and a plastically deformable portion are provided in a row in the width direction of the band-like body is also possible. The tightening band of the present invention is applicable when the mating member is a universal joint and the member to be tightened is a boot attached to an end of the universal joint.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the tightening band according to the present invention will be described in detail below. The present invention relates to an embodiment in which a universal joint of an automobile is used as a mating member, a boot attached to an end of the universal joint is used as a member to be tightened, and the boot is fastened and fixed to an end of the universal joint with a tightening band. As an embodiment, for example, a cover such as a dustproof bellows made of a flexible elastic body such as rubber or a synthetic resin, or a member to be tightened such as a fluid supply hose is fixed to a corresponding member such as a shaft or a tube corresponding thereto. It is also applicable to the case.
[0020]
1 to 5 show the first to fifth embodiments, wherein each figure (a) is a front view of a tightening band, (b) is a side view of (a), and (c) is A to E of (a). It is an expansion perspective view of a part. The tightening band 11 of each of the first to fifth embodiments is formed by forming claws 13a and 13b on one end 12a of a metal band 12 and holes 14a and 14b on the other end 12b. By engaging the claws 13a, 13b and the holes 14a, 14b in a state where the diameter of the ring 12 is reduced to an annular shape and the both ends 12a, 12b are overlapped, the member to be tightened is held in a tightened state with the mating member. .
[0021]
The holes 14a and 14b have the same form as the holes 4a and 4b shown in FIG. 6, and other than the holes 14a and 14b, nails 19a and 19b having the same form as the nails 9a and 9b shown in FIG. 7a, 13b, or claw 13a, 13b and claw 19a, 19b having the same form as claw 3a, 3b and claw 9a, 9b shown in FIG. You may let it.
[0022]
Claws 13a, 13b and holes 14a, 14b formed at both ends 12a, 12b of the above-mentioned strip 12 are provided at two locations in the circumferential direction. Also, projections 15a, 15b are provided on the overlapped both ends 12a, 12b, respectively, and the two projections 15a, 15b which are displaced in the circumferential direction are tightened so as to be close to each other in the circumferential direction by using a tool or the like. By applying a force, the claws 13a, 13b are engaged with the holes 14a, 14b or the claws 19a, 19b.
[0023]
In a state where both ends 12a and 12b of the belt-shaped body 12 are superimposed, a protrusion 15a is formed at the center in the width direction of the one end 12a located inside, and a length formed at the other end 12b located outside. By exposing the above-mentioned projection 15b of the one end 12a from the hole 14b, the projections 15a and 15b formed on both ends 12a and 12b are arranged in an operable state.
[0024]
As a structure having the same function as the protrusions 15a and 15b and a form of a tip portion such as a tool for performing a tightening operation, the protrusions 15c and 15d shown in FIG. 8 and the operation portions 18c and 18d, and the protrusions 15e and 15f shown in FIG. And the tip portions 18e and 18f, the holes 15g and 15h and the operation portions 18g and 18h shown in FIG. 10 as examples.
[0025]
Like the projection 15b, the projections 15d and 15f are formed at the center in the width direction of the one end 12a located inside, and are exposed from the elongated hole 14b formed at the other end 12b located outside. Has become. When the protrusions 15a, 15c, and 15e are located at the extreme end of the other end 12b and the other end 12b does not exist around the outside of the protrusions 15b, 15d, and 15f, the protrusions 15b, 15d, and 15f are It is exposed, and the form exposed from the long hole 14b is not required.
[0026]
In addition, the hole 15h is formed at the center in the width direction of the one end portion 12a located on the inside, and a tip portion such as a tool is inserted from the elongated hole 14b formed on the other end portion 12b located on the outside, In this embodiment, a tip projection 18k having a shape conforming to the hole 15h is engaged, and a tightening operation is performed together with the hole 15g similarly engaged with the tip projection 18j. When the hole 15h is located at the extreme end of the other end 12b and the other end 12b does not exist around the outside of the hole 15g, the hole 15g is exposed, and a tool such as a tool is inserted from the long hole 14b. There is no need to insert the tip.
[0027]
First, in the tightening band 11 of the first embodiment, as shown in FIGS. 1A to 1C, two rows of elastically deforming portions 16a which elastically deform in response to a force acting in the circumferential direction of the band-shaped body 12. And a structure in which a row of plastically deforming portions 17a that plastically deform are arranged in parallel in the width direction of the band-shaped body 12. The elastically deforming portion 16a has a shape in which both sides of the belt-shaped body 12 are cut and raised in a circumferential direction by press working. On the other hand, by forming the two rows of elastically deforming portions 16a as described above, the plastically deforming portion 17a has a shape that remains in one line between the two rows of elastically deforming portions 16a.
[0028]
As shown in FIGS. 2A to 2C, the tightening band 11 of the second embodiment has a structure in which a single row of elastically deforming portions 16b and two rows of plastically deforming portions 17b are arranged in parallel. The elastically deforming portion 16b has a shape in which a central portion of the band-shaped body 12 is cut and raised in the form of a knob along a circumferential direction by press working. On the other hand, the plastic deformation portion 17b has a shape in which two rows are left on both sides of the one row of the elastic deformation portions 16b by forming the one row of the elastic deformation portions 16b as described above.
[0029]
As shown in FIGS. 3A to 3C, the tightening band 11 of the third embodiment has a structure in which a row of elastic deformation portions 16c and a row of plastic deformation portions 17c are arranged in parallel. The elastically deformable portion 16c has the same shape as that of the second embodiment, that is, a shape in which one side in the width direction of the band-shaped body 12 is cut and raised in the form of a knob along the circumferential direction. On the other hand, the plastic deformation portion 17c has a shape in which one line of the elastic deformation portion 16c is formed as described above, so that the plastic deformation portion 17c remains in one line on one side of the one line of elastic deformation portion 16c.
[0030]
As in the case of the first embodiment, the tightening band 11 of the fourth embodiment includes two rows of elastic deformation parts 16d and one row of plastic deformation parts 17d arranged in parallel as shown in FIGS. 4 (a) to 4 (c). Is provided. The elastically deforming portion 16d has a shape in which both sides of the belt-shaped body 12 are formed into a sawtooth shape by pressing along the circumferential direction. On the other hand, by forming the two rows of elastically deforming portions 16d as described above, the plastically deforming portion 17d has a shape that remains in one line between the two rows of elastically deforming portions 16d.
[0031]
As in the case of the second embodiment, the tightening band 11 of the fifth embodiment includes a single row of elastically deforming portions 16e and two rows of plastically deforming portions 17e arranged in parallel as shown in FIGS. 5 (a) to 5 (c). Is provided. The elastically deforming portion 16e has a shape in which a central portion of the belt-shaped body 12 is formed into a pyramid shape by pressing along a circumferential direction. On the other hand, the plastic deformation portion 17e has a shape in which two rows remain on both sides of the one row of the elastic deformation portions 16e by forming the one row of the elastic deformation portions 16e as described above. If necessary, slits 20 arranged in the circumferential direction as shown in FIGS. 5D and 5E may be provided in the elastically deforming portion 16e.
[0032]
The tightening band 11 of each of the first to fifth embodiments described above has a circumferential dimension of approximately a semicircle along the circumferential direction. This provides the tightening force required by the object to be tightened, and prevents the elastically deformable portion 16e and the plastically deformable portion 16e from breaking even at the maximum elongation allowance due to a manufacturing error of the object to be tightened. This is for setting the circumferential dimension of the portion 17e, and varies depending on the condition of the tightening member to which the tightening band 11 is applied.
[0033]
At the time of assembling the tightening band 11, a tightening operation force is applied so that the two projections 15a and 15b of the both ends 12a and 12b of the overlapped band-like body 12 are brought close to each other in a circumferential direction by using a tool or the like. By temporarily inserting the claws 13a and 13b into the holes 14a and 14b in a state where the band-shaped body 12 is further reduced in diameter from the final tightened holding state, the claws 13a and 13b are engaged with each other. 13b is engaged with the claws 19a and 19b.
[0034]
The plastic deformation portions 17a to 17e are circumferentially extended to the plastic deformation region within a range not to be broken by the tightening operation force applied at the time of assembling the tightening band 11, and the elastic deformation portions 16a to 16e arranged in parallel are also extended by the same amount. State. At this time, the contraction force generated in the elastically deforming portions 16a to 16e is determined by its structure and dimensions, and material characteristics. The spring constant of the portion configured as the elastic deformation portions 16a to 16e as in the above-described embodiment is considerably smaller than the rigidity of the plastic deformation portions 17a to 17e.
[0035]
Thereby, the rigidity with respect to the force in the circumferential direction is increased as compared with the case where only the elastic deformation portions 16a to 16e are used, and the function of suppressing the variation in the interference due to the manufacturing error of the member to be tightened and the tightening band is exhibited. High tightening force can be obtained.
[0036]
Also, in the case where only plastically deformed parts such as punched holes are formed, when tensile force acts on the plastically deformed parts, elongation concentrates on the weakest part caused by material defects and shape factors, and a small elongation allowance At break. However, in the above-described embodiment, when the plastic deformation portions 17a to 17e in a certain portion are extended more than other portions, the elastic deformation portions 16a to 16e arranged in parallel are also extended, and the rigidity of the portion is increased. , So that the growth does not concentrate on the specific weakest part. That is, since the plastically deformed portions 17a to 17e are stretched while the stress is uniformly dispersed, the elongation up to breakage can be made longer than the structure in which only the plastically deformed portions are provided.
[0037]
【The invention's effect】
In this tightening band, the elastic deformation portion and the plastic deformation portion are arranged in parallel, so that the rigidity with respect to the force in the circumferential direction is larger than that of the case where only the elastic deformation portion is used, and the tightened band of the tightened member and the tightening band. It exerts the function of suppressing variations in the interference due to manufacturing errors, and a high tightening force can be obtained. In addition, when a tensile force is applied to the plastically deformed portion, the plastically deformed portion is stretched while the stress is uniformly dispersed, so that the elongation to break is lengthened. be able to.
[0038]
As a result, it is possible to obtain a large tightening force while sufficiently providing a function of suppressing a variation in the tightening force due to a manufacturing error of the tightened member and the tightening band, and to improve a fixing strength and a sealing property of the tightened member. And the practical application of the tightening band can be easily achieved.
[Brief description of the drawings]
1A is a front view showing a tightening band according to a first embodiment, FIG. 1B is a side view of FIG. 1A, and FIG. 1C is an enlarged perspective view of a portion A of FIG.
2A is a front view showing a tightening band according to a second embodiment, FIG. 2B is a side view of FIG. 2A, and FIG. 2C is an enlarged perspective view of a portion B of FIG.
3A is a front view showing a fastening band according to a third embodiment, FIG. 3B is a side view of FIG. 3A, and FIG. 3C is an enlarged perspective view of a portion C of FIG.
4A is a front view showing a tightening band according to a fourth embodiment, FIG. 4B is a side view of FIG. 4A, and FIG. 4C is an enlarged perspective view of a portion D in FIG.
5A is a front view showing a tightening band according to the fifth embodiment, FIG. 5B is a side view of FIG. 5A, FIG. 5C is an enlarged perspective view of a portion E of FIG. FIG. 3B is a diagram in which the slit of FIG. 4B is provided, and FIG. 4E is a diagram in which the slit of FIG.
6A is a front view showing a general tightening band, FIG. 6B is a side view of FIG. 6A, and FIG. 6C is an enlarged sectional view of a main part of FIG.
FIGS. 7 (a) and 7 (b) are diagrams showing a method of engaging the overlapping portion at the end of the band with claws.
FIG. 8 is a view showing a protrusion for a tightening operation and a tip form of a tool or the like.
FIG. 9 is a diagram showing a projection for a tightening operation and a tip form of a tool or the like.
FIG. 10 is a diagram showing a protrusion for a tightening operation and a tip form of a tool or the like.
[Explanation of symbols]
11 Tightening band 12 Strips 13a, 13b Claws 14a, 14b Holes 15a to 15h Tightening operation projections or holes 16a to 16e Elastic deformation portions 17a to 17e Plastic deformation portions 18c to 18h Tips 19a, 19b such as tools for performing a tightening operation nail

Claims (6)

金属製帯状体の一端部に爪を形成すると共にその他端部に孔または爪を形成し、前記帯状体を締付け操作力の付与により円環状に縮径させてその両端部を重合させた状態で前記爪と孔または爪と爪を係合させることにより、被締付け部材を相手部材に締付け固定する締付けバンドであって、前記帯状体の円周方向に作用する力に対する弾性変形部と塑性変形部を帯状体の幅方向に並列に配設したことを特徴とする締付けバンド。In a state where a claw is formed at one end of the metal band and a hole or a claw is formed at the other end, the band is circularly reduced in diameter by applying a tightening operation force, and both ends are overlapped. A tightening band for tightening and fixing a member to be tightened to a counterpart member by engaging the claw with the hole or the claw with the claw. Are arranged in parallel in the width direction of the band-shaped body. 前記弾性変形部と塑性変形部を帯状体の円周方向に沿って列状に形成した請求項1に記載の締付けバンド。The tightening band according to claim 1, wherein the elastically deformable portion and the plastically deformable portion are formed in a row along a circumferential direction of the band. 前記帯状体の幅方向に二列の弾性変形部を設け、その弾性変形部間に一列の塑性変形部を介在させた請求項1に記載の締付けバンド。The tightening band according to claim 1, wherein two rows of elastically deformable portions are provided in the width direction of the band-shaped body, and one row of plastically deformable portions are interposed between the elastically deformable portions. 前記帯状体の幅方向に二列の塑性変形部を設け、その塑性変形部間に一列の弾性変形部を介在させた請求項1に記載の締付けバンド。The tightening band according to claim 1, wherein two rows of plastically deformed portions are provided in the width direction of the band-shaped body, and one row of elastically deformed portions is interposed between the plastically deformed portions. 前記帯状体の幅方向に弾性変形部と塑性変形部を一列ずつ設けた請求項1に記載の締付けバンド。The tightening band according to claim 1, wherein an elastically deformable portion and a plastically deformable portion are provided in a row in a width direction of the band-shaped body. 前記相手部材が自在継手であり、かつ、被締付け部材が前記自在継手の端部に装着されるブーツである請求項1乃至5のいずれかに記載の締付けバンド。The tightening band according to any one of claims 1 to 5, wherein the counterpart member is a universal joint, and the member to be tightened is a boot attached to an end of the universal joint.
JP2003146456A 2003-05-23 2003-05-23 Fastening band Withdrawn JP2004347060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003146456A JP2004347060A (en) 2003-05-23 2003-05-23 Fastening band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003146456A JP2004347060A (en) 2003-05-23 2003-05-23 Fastening band

Publications (1)

Publication Number Publication Date
JP2004347060A true JP2004347060A (en) 2004-12-09

Family

ID=33533306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003146456A Withdrawn JP2004347060A (en) 2003-05-23 2003-05-23 Fastening band

Country Status (1)

Country Link
JP (1) JP2004347060A (en)

Similar Documents

Publication Publication Date Title
US8060991B2 (en) Fixing device for hose clamp
US8314337B2 (en) Grommet for wire harness
JP2008095960A (en) Hose clamp
JP4842055B2 (en) Hose connection device
JP2687954B2 (en) Fixing device for the hose part pushed into the pipe part
KR101269686B1 (en) Hose clamp
EP1081395A1 (en) Attachment device
JP2003018727A (en) Clamp for corrugated tube for wiring harness
JPH0776596B2 (en) Tightening band
JPH0762515B2 (en) Retaining ring
JP2004347060A (en) Fastening band
JPH0882393A (en) Hose clamp
KR101300824B1 (en) Hose clamp
JP2008082396A (en) Constant velocity universal joint
CN110691913B (en) Clamp apparatus
JP2021028524A (en) Fixture
JP2004301140A (en) Tightening band
JP6660746B2 (en) Hose clamp
KR200161149Y1 (en) Hose clip
JP6398868B2 (en) In-vehicle component with clamp
WO2020031981A1 (en) Hose clamp
JPH0417895Y2 (en)
JPH10148292A (en) Hose assembly unit and hose clamp used in this hose assembly unit
JPH085377Y2 (en) Boots for constant velocity joints
JP2003212044A (en) Door mirror for vehicle and installing structure thereof

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060324

A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20070702