JP6159669B2 - Tightening band - Google Patents

Tightening band Download PDF

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JP6159669B2
JP6159669B2 JP2014037220A JP2014037220A JP6159669B2 JP 6159669 B2 JP6159669 B2 JP 6159669B2 JP 2014037220 A JP2014037220 A JP 2014037220A JP 2014037220 A JP2014037220 A JP 2014037220A JP 6159669 B2 JP6159669 B2 JP 6159669B2
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band
plate
band member
tightening
fixed
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JP2015161367A (en
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鳥海 真幸
真幸 鳥海
古田 裕二
裕二 古田
尚紀 伊藤
尚紀 伊藤
高志 南出
高志 南出
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Toyoda Gosei Co Ltd
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Description

本発明は、レバーを環状に形成されたバンド部材に沿うように傾倒させることで当該バンド部材を縮径させて被締付け物を締め付ける締付けバンドに関する。   The present invention relates to a tightening band for tightening an object to be tightened by tilting a lever along a band member formed in an annular shape to reduce the diameter of the band member.

図13に示すように、等速ジョイントには、アウタレース51の断面形状が締付けバンドの締付け形状(円形)と異なる非円形のもの、例えばアウタレース51の外周に凸部51aと凹部51bとが交互に形成されたトリポード型の等速ジョイントがある。等速ジョイントは、アウタレース51には駆動側シャフト54が連結されており、被駆動側シャフト55の周囲に3カ所に設けられたローラ(フリーリング)56(図10(A)(D)参照)がアウタレース51内に形成されたローラ溝と各々嵌合して連結される。アウタレース51と被駆動側シャフト55との連結部は、ローラ56とローラ溝間に充填されるグリースの漏れを防いだり異物の侵入を防いだりするため蛇腹状に形成されたブーツ52に覆われ、当該ブーツ外周に締付けバンド53を嵌め込んで縮径することで一体に組み付けられる。このとき、例えば内周側が凸部51aと凹部51bとに密着するように形成されるとともに外周側が円形に形成されたグロメット(図示せず)をアウタレース51の外周に嵌め込むことで、ブーツ52とアウタレース51との間の隙間をなくして締め付けを行う製品がある。   As shown in FIG. 13, the constant velocity joint includes a non-circular outer race 51 whose cross-sectional shape is different from the tightening shape (circular) of the tightening band, for example, convex portions 51 a and concave portions 51 b alternately on the outer periphery of the outer race 51. There is a tripod type constant velocity joint formed. In the constant velocity joint, a driving side shaft 54 is connected to the outer race 51, and rollers (free rings) 56 provided at three positions around the driven side shaft 55 (see FIGS. 10A and 10D). Are respectively fitted and connected to the roller grooves formed in the outer race 51. The connecting portion between the outer race 51 and the driven side shaft 55 is covered with a boot 52 formed in a bellows shape to prevent leakage of grease filled between the roller 56 and the roller groove or to prevent entry of foreign matter, The fastening band 53 is fitted on the outer periphery of the boot and is reduced in diameter so that the boot is integrated. At this time, for example, by fitting a grommet (not shown) whose inner peripheral side is formed in close contact with the convex portion 51a and the concave portion 51b and whose outer peripheral side is formed into a circle into the outer periphery of the outer race 51, There is a product that performs tightening without a gap between the outer race 51.

ブーツ52とアウタレース51との間にグロメットなどの弾性部材を用いると、締付反力の少ない比較的硬質の樹脂製ブーツ52をシールする際にもブーツ52の変形量にグロメットの弾性変形量が追従するため締付反力を確保することができる。しかしながら、締付けバンド53のレバー53aを傾倒させる際に当該レバー53aの支点側に配置されたプレート(図示せず)が変形しやすくなり、そのシール性が低下するおそれがある。この問題を解決するためシール性の低下を抑制しつつプレートがレバーの傾倒により変形しない厚みにすることで、非円形断面のアウタレースに対しても良好なシール性を保ちつつ樹脂製ブーツをシールすることが可能な締付けバンドが提案されている(特許文献1参照)。   When an elastic member such as a grommet is used between the boot 52 and the outer race 51, the amount of elastic deformation of the grommet is less than the amount of deformation of the boot 52 even when sealing the relatively hard resin boot 52 with less tightening reaction force. The tightening reaction force can be ensured to follow. However, when the lever 53a of the tightening band 53 is tilted, a plate (not shown) arranged on the fulcrum side of the lever 53a is likely to be deformed, and the sealing performance may be lowered. In order to solve this problem, the resin boot is sealed while maintaining a good sealing property against the outer race of the non-circular cross section by making the thickness of the plate not to be deformed by the tilt of the lever while suppressing the deterioration of the sealing property. A tightening band that can be used has been proposed (see Patent Document 1).

特許第4926999号公報Japanese Patent No. 4926999

近年、さらなる部品点数を削減し製造コストを削減するため、樹脂製ブーツ52の開口部にグロメットに相当する部分をブーツ52の樹脂材料により一体成形したものを直接等速ジョイントのアウタレース51の外周に嵌め込んで締付けバンド53により締め付けることが行われている。   In recent years, in order to further reduce the number of parts and reduce the manufacturing cost, a part corresponding to a grommet is integrally formed with the resin material of the boot 52 in the opening of the resin boot 52 and directly on the outer periphery of the outer race 51 of the constant velocity joint. It is inserted and tightened by the tightening band 53.

エンジン側の等速ジョイントは機構上複雑な形状となっているため、図14(A)〜(C)に示すように使用されるブーツ52Aの材料としては、クロロプレンゴム(CRゴム)が主に使用されてきた。CRゴムの場合、締付けバンド53を縮径すると、図14(C)の矢印に示すようにブーツ52Aからの締付反力の分布が比較的均一になるためシール性を良好に維持することができた。しかしながら、CRゴム製のブーツ52Aは、大気中のオゾンの影響を受けやすく、耐久性が低下しやすいことから、図14(D)〜(F)に示すように熱可塑性ポリエステル系エラストマー(TPEE)を用いて屈曲性に強くリサイクル可能な比較的硬質な樹脂製ブーツ52Bに切り替わりつつある。   Since the constant velocity joint on the engine side has a complicated structure, chloroprene rubber (CR rubber) is mainly used as the material of the boot 52A used as shown in FIGS. Have been used. In the case of CR rubber, when the diameter of the tightening band 53 is reduced, the distribution of the tightening reaction force from the boot 52A becomes relatively uniform as shown by the arrow in FIG. did it. However, since the CR rubber boot 52A is easily affected by ozone in the atmosphere and its durability is likely to be lowered, a thermoplastic polyester elastomer (TPEE) as shown in FIGS. 14 (D) to (F). Is being switched to a relatively hard resin boot 52B that is highly recyclable and highly recyclable.

この場合、被締付け物であるトリポート型の等速ジョイントのアウタレース51が円形ではなく異形状をしていること、樹脂製ブーツ52Bには締付反力がほとんど期待できないことから、締付けバンド53をブーツ52Bの外周に嵌めて縮径すると、ブーツ52の変形量に締付けバンド53の変形量が追従できないため、図14(F)の矢印に示すようにブーツ52Bからの締付反力の分布が不均一となり、アウタレース51の凸部51aと凹部51bとの境界付近でシール性が不十分となりグリースが漏れ出すおそれがある。
また、締付けバンド53の内周側に取り付けられるプレート(図5(B)参照)は、バンド部材の接合部により隙間へ被締付け物が逃げて締付け力が作用しないのを防ぐことができるが、内周側バンド端に設けられるため曲率が大きくなって、被締付け物を締め付ける有効内径が小さくなりやすく、使い勝手が低下する。
In this case, since the outer race 51 of the tripod type constant velocity joint, which is the object to be tightened, has an irregular shape instead of a circle, and the resin boot 52B can hardly be expected to have a tightening reaction force, the tightening band 53 is When the diameter of the boot 52B is reduced by fitting to the outer periphery of the boot 52B, the amount of deformation of the tightening band 53 cannot follow the amount of deformation of the boot 52. Therefore, as shown by the arrow in FIG. It becomes non-uniform, and there is a risk that grease may leak due to insufficient sealing performance near the boundary between the convex portion 51a and the concave portion 51b of the outer race 51.
Further, the plate (see FIG. 5B) attached to the inner peripheral side of the tightening band 53 can prevent the object to be tightened from escaping into the gap due to the joint portion of the band member and the tightening force not acting. Since it is provided at the inner peripheral band end, the curvature increases, the effective inner diameter for tightening the object to be tightened tends to decrease, and the usability decreases.

本願発明の目的は上記従来技術の課題を解決し、被締付け物から締付反力が得られなくても締付け可能な、シール性、装着性のよい締付けバンドを提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and provide a tightening band having a good sealing property and mountability that can be tightened even if a tightening reaction force cannot be obtained from a tightened object.

本発明は上記目的を達成するため、次の構成を備える。
即ち、金属帯状部材が環状に形成され両端の内周面が接合された接合部を有するバンド部材と、前記接合部に固定され前記バンド部材の外周面に当接する一端側を支点として他端側を傾倒させることにより当該バンド部材を縮径させる弧状のレバーと、前記バンド部材の内周面に固定されるベース部の両端から径方向外側に起立した折り曲げ部とからなり、前記バンド部材に傾倒した前記レバーを固定するバックルと、前記バンド部材の内周面に前記バックルに隣接して固定端が固定されるとともに、前記レバーの傾倒により屈曲された前記バンド部材における前記接合部の内周側の隙間を円周方向に沿って覆うように自由端が弧状に延設された弧状のプレートとを備え、前記レバーを前記バンド部材に沿うように傾倒させることで前記バンド部材を縮径させて被締付け物を締め付ける締付けバンドであって、前記プレートは、前記固定端から自由端に向かって曲率が段階的に小さくなるように形成されており、前記プレートと前記バンド部材との隙間には、前記バンド部材を縮径させた際に前記プレートと前記バンド部材との間で挟み込まれて弾性変形可能な弾性部材が前記プレート上に固定されていることを特徴とする。
In order to achieve the above object, the present invention comprises the following arrangement.
That is, a band member having a joint portion in which a metal strip member is formed in an annular shape and inner peripheral surfaces of both ends are joined, and one end side that is fixed to the joint portion and abuts on the outer peripheral surface of the band member as a fulcrum An arc-shaped lever that reduces the diameter of the band member by inclining, and a bent portion that stands up radially outward from both ends of the base portion fixed to the inner peripheral surface of the band member. A buckle for fixing the lever, and a fixed end adjacent to the buckle on the inner peripheral surface of the band member, and an inner peripheral side of the joint portion of the band member bent by tilting the lever the bar of the gap and the circumferential arc of the free end so as to cover along the extending arcuately a plate comprising, by tilting the lever along the band member The de member reduced in diameter by a tightening band clamp the object to be fastened object, the plate, the curvature toward the free end from the fixed end is formed to be stepwise small, the plate and the band An elastic member capable of being elastically deformed by being sandwiched between the plate and the band member when the diameter of the band member is reduced is fixed to the gap between the member and the plate. .

上述した締付けバンドを用いれば、プレートとバンド部材との隙間には、バンド部材を縮径させた際にプレートとバンド部材との間で挟み込まれて弾性変形可能な弾性部材がプレート上に固定されているので、被締付け物の変形量に追従して弾性部材を変形させることができ、バンド部材を縮径させた際に弾性部材を介して被締付け物に対して最適な締付け力を付与し弾性部材から締付け反力を得ることができるので、バンド部材によるシール性を維持することができる。   When the above-described tightening band is used, an elastic member that can be elastically deformed by being sandwiched between the plate and the band member when the band member is reduced in diameter is fixed on the plate in the gap between the plate and the band member. Therefore, the elastic member can be deformed following the amount of deformation of the object to be tightened, and an optimum tightening force is applied to the object to be tightened via the elastic member when the band member is reduced in diameter. Since the tightening reaction force can be obtained from the elastic member, the sealing performance by the band member can be maintained.

また、プレートは、固定端から自由端に向かって曲率が段階的に小さくなるように形成されていると、被締付け物の有効内径をできるだけ大きくすることができる。
具体的には、プレートの固定端側の第一湾曲部がバンド部材に倣った曲率R1を有し、当該第一湾曲部に連続して設けられた第二湾曲部がそれより大きい曲率R2を有し、当該第二湾曲部に連続して自由端側に設けられた第三湾曲部がそれより大きい曲率R3を有していることが好ましい。
これにより、プレートの固定端から自由端に向かって第一湾曲部の曲率R1<第二湾曲部の曲率R2<第三湾曲部の曲率R3となっているので、バンド部材の有効内径を可能な限り大きくすることができる。
Further, when the plate is formed so that the curvature decreases stepwise from the fixed end toward the free end, the effective inner diameter of the object to be tightened can be made as large as possible.
Specifically, the first curved portion on the fixed end side of the plate has a curvature R1 that follows the band member, and the second curved portion provided continuously to the first curved portion has a larger curvature R2 than that. It is preferable that the third curved portion provided on the free end side continuously with the second curved portion has a larger curvature R3.
Thereby, since the curvature R1 of the first curved portion <the curvature R2 of the second curved portion <the curvature R3 of the third curved portion from the fixed end to the free end of the plate, the effective inner diameter of the band member is possible. Can be as large as possible.

また、前記弾性部材は、前記プレート外周面に一端側が固定され、少なくとも外側バンド部材に向かって凸になるように湾曲した複数の湾曲部を備えていると、被締付け物が変形し難い材質であったり、異形状であったりしても、バンド部材を縮径させた際に湾曲部が弾性変形することで被締付け物の変形量を補う締付反力が得られるので、被締付け物に対してシール性を維持することができる。   Further, the elastic member is made of a material that is fixed to one end side of the outer peripheral surface of the plate and has a plurality of curved portions that are curved so as to be convex toward at least the outer band member. Even when the band member is deformed, the bending portion elastically deforms when the band member is reduced in diameter, so that a tightening reaction force that compensates for the amount of deformation of the object to be tightened can be obtained. On the other hand, the sealing performance can be maintained.

また、前記弾性部材に設けられた複数の湾曲部は、前記プレートの自由端から固定端に向かって高さが異なる湾曲部が設けられていると、被締付け物の変形量に応じて湾曲部が弾性変形することで、締付反力の分布を均一にして最適な締付け力で締め付けることができる。   In addition, the plurality of bending portions provided on the elastic member are provided with bending portions having different heights from the free end to the fixed end of the plate according to the deformation amount of the object to be tightened. By elastically deforming, the distribution of the tightening reaction force can be made uniform and tightening can be performed with the optimum tightening force.

また、前記弾性部材は、ばね特性を有するステンレス系金属材が用いられる事が望ましい。これにより、バンド部材及び弾性部材を同一のステンレス系金属材を用いて製造することができ、締め付けバンドを単一のばね鋼を用いて製造する場合に比べて、低コストで加工性がよい。   The elastic member is preferably made of a stainless steel metal material having spring characteristics. Thereby, a band member and an elastic member can be manufactured using the same stainless steel metal material, and workability is good at low cost compared with the case where a fastening band is manufactured using a single spring steel.

本発明に係る締付けバンドを用いれば、被締付け物から締付反力が得られなくても締付け可能な、シール性、装着性のよい締付けバンドを提供することができる。   By using the tightening band according to the present invention, it is possible to provide a tightening band having good sealability and mountability that can be tightened even if a tightening reaction force cannot be obtained from the object to be tightened.

締付けバンドの縮径前後の斜視図である。It is a perspective view before and behind diameter reduction of a fastening band. 図1の締付けバンドのバンド部材とプレートの分解斜視図である。FIG. 2 is an exploded perspective view of a band member and a plate of the tightening band of FIG. 1. プレートに対する弾性部材の組み付け構造を示す分解斜視図である。It is a disassembled perspective view which shows the assembly structure of the elastic member with respect to a plate. レバー傾倒状態における弾性部材を含むプレートの部分拡大図である。It is the elements on larger scale of the plate containing the elastic member in a lever inclination state. 曲率変化を設けた締付けバンドの説明図と、曲率変化を設けない締付けバンドの対比図である。It is explanatory drawing of the fastening band which provided the curvature change, and the contrast figure of the fastening band which does not provide a curvature change. 図3(A)〜(C)に係るプレートとバンド部材との分解斜視図、レバー傾倒前後の締付けバンドの斜視図である。FIG. 4 is an exploded perspective view of the plate and the band member according to FIGS. 3A to 3C, and a perspective view of a tightening band before and after the lever is tilted. 図3(D)〜(F)に係るプレートとバンド部材との分解斜視図、レバー傾倒前後の締付けバンドの斜視図である。FIG. 4 is an exploded perspective view of the plate and the band member according to FIGS. 3D to 3F, and a perspective view of a tightening band before and after the lever is tilted. 他例に係るプレートに対する弾性部材の固定構造を示す斜視説明図である。It is perspective explanatory drawing which shows the fixing structure of the elastic member with respect to the plate which concerns on another example. 図8のバンド部材とプレートの分解斜視図、レバー傾倒前後の締付けバンドの斜視図である。FIG. 9 is an exploded perspective view of the band member and the plate of FIG. 8, and a perspective view of a tightening band before and after the lever is tilted. プレートに対する弾性部材の位置決め構造を示す分解斜視図である。It is a disassembled perspective view which shows the positioning structure of the elastic member with respect to a plate. 他例に係るプレートに対する弾性部材の位置決め構造を示す分解斜視図である。It is a disassembled perspective view which shows the positioning structure of the elastic member with respect to the plate which concerns on another example. 他例に係る弾性部材の形態を示す斜視説明図である。It is a perspective explanatory view showing the form of the elastic member concerning other examples. 従来の等速ジョイントを覆うブーツ構成を示す斜視説明図である。It is perspective explanatory drawing which shows the boot structure which covers the conventional constant velocity joint. CRブーツと樹脂ブーツの締付反力の相違とシール性を示す対比説明図である。It is contrast explanatory drawing which shows the difference in the clamping reaction force of CR boot and a resin boot, and a sealing performance.

以下、本発明を実施するための形態に図面を参照して説明する。
先ず、図1乃至図12を参照して等速ジョイント用ブーツを締め付ける締付けバンドについて説明する。等速ジョイント用ブーツは、ジョイントケースとシャフトの連結部を覆って、当該ジョイントケース内の軸受部に封入されたグリースの漏出や異物の侵入を防ぐために設けられる。尚、以下では、被締付け物に弾性を持たないもの、例えばトリポートジョイントを構成するアウタレースにグロメットなどの弾性部材を用いずに熱可塑性ポリエステル系エラストマー(TPEE)などの樹脂製ブーツを直接嵌め込んでその外周を締付けバンドにより縮径固定することを想定している。
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
First, a tightening band for tightening a constant velocity joint boot will be described with reference to FIGS. The constant velocity joint boot is provided to cover the joint portion between the joint case and the shaft and prevent leakage of grease sealed in the bearing portion in the joint case and entry of foreign matter. In addition, in the following, a boot made of resin such as a thermoplastic polyester elastomer (TPEE) is directly fitted into an outer race constituting a tripart joint without using an elastic member such as a grommet. It is assumed that the outer periphery is fixed to a reduced diameter by a fastening band.

図1(A)(B)に示すように、締付けバンド1は、金属帯状部材(例えばSUS430)が環状に形成されたバンド部材2を備えている。バンド部材2は、両端の内周面が抵抗溶接により接合された接合部2aにより環状に形成されている。また、接合部2aには弧状に形成されたレバー3(例えばSUS430)が抵抗溶接により固定されている。レバー3はバンド部材2の外周面に当接する一端側3aを支点として他端側3bを傾倒させることによりバンド部材2を縮径させることができる。   As shown in FIGS. 1A and 1B, the fastening band 1 includes a band member 2 in which a metal strip member (for example, SUS430) is formed in an annular shape. The band member 2 is formed in an annular shape by a joint portion 2a in which inner peripheral surfaces at both ends are joined by resistance welding. A lever 3 (for example, SUS430) formed in an arc shape is fixed to the joint portion 2a by resistance welding. The lever 3 can reduce the diameter of the band member 2 by tilting the other end side 3b with the one end side 3a contacting the outer peripheral surface of the band member 2 as a fulcrum.

また、バンド部材2の内周面にはバックル4(例えばSUS430)が抵抗溶接により固定されている。バックル4は、バンド部材2の内周面に接合されるベース部4aの両端から径方向外側に起立した折り曲げ片4bと、を備えており、バンド部材2の外周面に傾倒したレバー3に折り曲げ片4bを重ね合わせるように両側から折り曲げることで、レバー3の戻りを抑えて固定する。   A buckle 4 (for example, SUS430) is fixed to the inner peripheral surface of the band member 2 by resistance welding. The buckle 4 includes a bent piece 4b that stands up radially outward from both ends of the base portion 4a that is joined to the inner peripheral surface of the band member 2, and is bent to a lever 3 that is inclined to the outer peripheral surface of the band member 2. The lever 4 is bent from both sides so that the pieces 4b are overlapped, and the return of the lever 3 is suppressed and fixed.

また、バンド部材2の内周面には、接合部2aの内周側の隙間を跨いで円周方向に沿って覆うように弧状のプレート5(例えばSUS430)が設けられている。図2に示すように、プレート5は固定端5aがバックル4に隣接して固定されるとともに、レバー3の傾倒により屈曲されたバンド部材2における接合部2aの内周側の隙間を円周方向に沿って覆うように自由端5bが弧状に延設されている。   In addition, an arc-shaped plate 5 (for example, SUS430) is provided on the inner peripheral surface of the band member 2 so as to cover the gap on the inner peripheral side of the joint portion 2a along the circumferential direction. As shown in FIG. 2, the fixed end 5a of the plate 5 is fixed adjacent to the buckle 4, and the gap on the inner peripheral side of the joint portion 2a in the band member 2 bent by the tilting of the lever 3 is circumferential. The free end 5b is extended in an arc shape so as to cover along.

図3(A)(D)に示すように、プレート5はレバー3の支点(一端側3a)から曲げ応力を受けたり、後述する弾性部材6から曲げ応力を受けたりするため、プレート5の幅方向両側に径方向外側に向かって起立する一対の起立壁5cが長手方向に連続して設けられている。これにより、プレート5が断面コ字状に形成され、全体として断面係数を上げて変形し難いように補強されている。また、プレート5の補強構造としては、一対の起立壁5cを設ける代わりにプレート5の長手方向に沿って凹溝を形成してもよく、起立壁5cと凹溝を併用してもよい。   As shown in FIGS. 3A and 3D, the plate 5 receives bending stress from the fulcrum (one end side 3a) of the lever 3, and receives bending stress from the elastic member 6 described later. A pair of upright walls 5c are provided continuously in the longitudinal direction on both sides in the direction. As a result, the plate 5 is formed in a U-shaped cross section and is reinforced so as to be difficult to be deformed by increasing the section modulus as a whole. Moreover, as a reinforcement structure of the plate 5, instead of providing a pair of standing walls 5c, a groove may be formed along the longitudinal direction of the plate 5, or the wall 5c and the groove may be used in combination.

また、図5(A)に示すように、プレート5は、固定端5aから自由端5bに向かって曲率が段階的に小さくなるように形成されている。
具体的には、プレート5の固定端5a側の第一湾曲部5Aがバンド部材2に倣った曲率R1を有し、当該第一湾曲部5Aに連続して設けられた第二湾曲部5Bがそれより大きい曲率R2を有し、当該第二湾曲部5Bに連続して自由端5b側に設けられた第三湾曲部5Cがそれより大きい曲率R3を有している。
Further, as shown in FIG. 5A, the plate 5 is formed so that the curvature decreases stepwise from the fixed end 5a toward the free end 5b.
Specifically, the first bending portion 5A on the fixed end 5a side of the plate 5 has a curvature R1 that follows the band member 2, and the second bending portion 5B provided continuously to the first bending portion 5A is provided. The third curved portion 5C that has a larger curvature R2 and is provided on the free end 5b side continuously to the second curved portion 5B has a larger curvature R3.

これにより、プレート5の固定端5aから自由端5bに向かって第一湾曲部5Aの曲率R1<第二湾曲部5Bの曲率R2<自第三湾曲部5Cの曲率R3となっているので、バンド部材2の有効内径φB(=φA−h)を可能な限り大きくすることができる。即ち、プレート5はバンド部材2より内側に配置されるため、ブーツに嵌め込まれる際に有効内径が十分広くとることが望ましい。このため、プレート5の曲率を固定端5aから自由端5bに向かって段階的に大きくすることにより、バンド部材2の外径φAより弾性部材6(湾曲部6b)の高さhだけ有効内径φBが小さくなるだけで済む。従って、より大きな外径の樹脂ブーツを締付けることができ、バンドの装着性が改善される。   Thereby, from the fixed end 5a of the plate 5 toward the free end 5b, the curvature R1 of the first curved portion 5A <the curvature R2 of the second curved portion 5B <the curvature R3 of the third curved portion 5C. The effective inner diameter φB (= φA−h) of the member 2 can be increased as much as possible. That is, since the plate 5 is disposed on the inner side of the band member 2, it is desirable that the effective inner diameter is sufficiently wide when fitted into the boot. Therefore, by increasing the curvature of the plate 5 stepwise from the fixed end 5a toward the free end 5b, the effective inner diameter φB is equal to the height h of the elastic member 6 (curved portion 6b) than the outer diameter φA of the band member 2. Only needs to be smaller. Accordingly, a resin boot having a larger outer diameter can be tightened, and the band mounting property is improved.

仮にプレート5に曲率変化を持たせない場合、図5(B)に示すようにプレート5はバンド部材2に倣った曲率R1を有するため、弾性部材6の湾曲部6bが外側バンド部材2に当接して自由端5bはバンド部材2の内側に深く入り込んで被締付け物である樹脂ブーツの有効内径φB´(<φB)は限られた大きさとなる。   If the plate 5 does not change in curvature, the plate 5 has a curvature R1 that follows the band member 2 as shown in FIG. The free end 5b comes into contact with the inside of the band member 2 so that the effective inner diameter φB ′ (<φB) of the resin boot, which is the object to be tightened, has a limited size.

図3(B)(E)に示すように、プレート5上には、弾性変形可能な弾性部材6が例えば抵抗溶接されて固定されている。弾性部材6は、ばね特性を有するステンレス系金属材(例えばSUS301)が好適に用いられる。これにより、バンド部材2及び弾性部材6を同一のステンレス系金属材(SUS)を用いて製造することができ、締め付けバンド1を単一のばね鋼を用いて製造する場合に比べて、低コストで加工性がよい。   As shown in FIGS. 3B and 3E, an elastically deformable elastic member 6 is fixed on the plate 5 by, for example, resistance welding. As the elastic member 6, a stainless steel metal material having spring characteristics (for example, SUS301) is preferably used. Thereby, the band member 2 and the elastic member 6 can be manufactured using the same stainless steel metal material (SUS), and compared with the case where the fastening band 1 is manufactured using a single spring steel, it is low-cost. Good workability.

弾性部材6は、バンド部材2を縮径させた際にプレート5とバンド部材2との間で挟み込まれて被締付け物からの締付反力を付与する。弾性部材6は、外側バンド部材2に向かって凸になるように湾曲した複数の湾曲部6bが形成されている、例えば、図3(B)(E)に示すように平坦部6aと湾曲部6bとが交互に連続して形成された形状をしている。本実施例では、平坦部6aを3カ所、湾曲部6bを2カ所に設けられているが、これより湾曲部6bの数を増やしてもよい。図4に示すようにレバー3をバンド部材2に沿うように傾倒させて縮径させた際に、被締付け物の変形量に応じて湾曲部6bの高さが変わることにより、締付反力を発生させることができる。   The elastic member 6 is sandwiched between the plate 5 and the band member 2 when the band member 2 is reduced in diameter, and applies a tightening reaction force from the object to be tightened. The elastic member 6 is formed with a plurality of curved portions 6b that are curved so as to be convex toward the outer band member 2, for example, as shown in FIGS. 3B and 3E, a flat portion 6a and a curved portion. 6b has a shape formed alternately and continuously. In the present embodiment, three flat portions 6a and two curved portions 6b are provided, but the number of curved portions 6b may be increased. As shown in FIG. 4, when the lever 3 is tilted along the band member 2 to reduce the diameter, the height of the curved portion 6 b changes according to the amount of deformation of the object to be tightened. Can be generated.

弾性部材6は、図3(C)に示すように3カ所ある平坦部6aのうち中央部の平坦部6aをプレート5に抵抗溶接されて組み付けられている。バンド部材2が縮径されると、両端側の平坦部6aは起立壁5cの間で各々スライド可能に配置されている。具体的には、弾性部材6は、第二湾曲部5Bに沿って位置決めされ抵抗溶接されて組み付けられる。弾性部材6とプレート5は、治具により保持されて固定されるため、任意の位置に組み付けることができる。   As shown in FIG. 3C, the elastic member 6 is assembled by resistance welding the flat portion 6 a at the center of the three flat portions 6 a to the plate 5. When the band member 2 is reduced in diameter, the flat portions 6a on both ends are slidably disposed between the standing walls 5c. Specifically, the elastic member 6 is positioned along the second curved portion 5B and assembled by resistance welding. Since the elastic member 6 and the plate 5 are held and fixed by a jig, they can be assembled at arbitrary positions.

また、弾性部材6は、中央部にある平坦部6aに限らず、他の平坦部6aを用いてプレート5に固定されていてもよい。例えば、図3(F)に示すように、弾性部材6のうち、プレート5の自由端5b側に形成された平坦部6aを抵抗溶接されてプレート5に固定されていてもよい。この場合には、バンド部材2が縮径されると、中央部及びプレート5の固定端側の平坦部6aは各々起立壁5cの間で各々スライド可能に配置されている。   Further, the elastic member 6 is not limited to the flat portion 6a at the central portion, and may be fixed to the plate 5 using another flat portion 6a. For example, as shown in FIG. 3F, a flat portion 6 a formed on the free end 5 b side of the plate 5 in the elastic member 6 may be resistance-welded and fixed to the plate 5. In this case, when the diameter of the band member 2 is reduced, the central portion and the flat portion 6a on the fixed end side of the plate 5 are slidably disposed between the standing walls 5c.

図4に示すように、レバー3をバンド部材2の外周面に当接する一端側3aを支点としてバンド部材2に沿うように傾倒させると、バンド部材2が縮径されるため、2カ所に設けられた平坦部6aが自由端5b側及び固定端5a側へ各々スライドしながら湾曲部6bが外側バンド部材2に押圧されて高さが変わる。このとき、弾性部材6の湾曲部6bから被締付け物に作用する押圧力の反作用として被締付け物から締付け反力として得られる。   As shown in FIG. 4, when the lever 3 is tilted along the band member 2 with the one end side 3a contacting the outer peripheral surface of the band member 2 as a fulcrum, the band member 2 is reduced in diameter. The curved portion 6b is pressed by the outer band member 2 while the flat portion 6a is slid toward the free end 5b side and the fixed end 5a side, and the height changes. At this time, the reaction force of the pressing force acting on the object to be tightened from the curved portion 6b of the elastic member 6 is obtained as a tightening reaction force from the object to be tightened.

次に、弾性部材6を固定されたプレート5のバンド部材2への組み付け動作と締付けバンドの締付け動作について図6及び図7を参照して説明する。
図6(A)に示すように、弾性部材6の中央部に形成された平坦部6aが抵抗溶接されたプレート5が、固定端5a側をバックル4に隣接するように位置合わせしてバンド部材2の内周側に重ね合わせて、抵抗溶接により固定端5aが固定される。このとき、図6(B)に示すようにプレート5の自由端5b側は、バンド部材2の接合部2aを跨いでバンド部材2の内周側に組み付けられる。プレート5が組み付けられた締付けバンド1を図示しない被締付け物(例えば樹脂製ブーツ)に嵌め込んで装着する。そして、図6(C)に示すように、レバー3が一端3aを支点としてバンド部材2に沿うように傾倒され、他端3bがバックル4の一対の折り曲げ片4bの間に配置されるまで押し倒す。このとき、弾性部材6は、バンド部材2とプレート5によって挟み込まれて2カ所ある湾曲部6bが押し潰される。そして、一対の折り曲げ片4bをレバー3に上に折り曲げることにより、レバー3が固定され締付けバンド1が縮径状態で維持される。
Next, the assembly operation of the plate 5 to which the elastic member 6 is fixed to the band member 2 and the tightening operation of the tightening band will be described with reference to FIGS. 6 and 7.
As shown in FIG. 6 (A), the band member is formed by aligning the plate 5 to which the flat portion 6a formed at the center of the elastic member 6 is resistance-welded so that the fixed end 5a side is adjacent to the buckle 4. The fixed end 5a is fixed by resistance welding so as to overlap the inner peripheral side of 2. At this time, the free end 5 b side of the plate 5 is assembled to the inner peripheral side of the band member 2 across the joint portion 2 a of the band member 2 as shown in FIG. The fastening band 1 to which the plate 5 is assembled is fitted into an object to be fastened (for example, a resin boot) that is not shown. Then, as shown in FIG. 6C, the lever 3 is tilted along the band member 2 with the one end 3a as a fulcrum, and pushed down until the other end 3b is arranged between the pair of bent pieces 4b of the buckle 4. . At this time, the elastic member 6 is sandwiched between the band member 2 and the plate 5, and the two curved portions 6b are crushed. Then, by bending the pair of bent pieces 4b upward on the lever 3, the lever 3 is fixed and the fastening band 1 is maintained in a reduced diameter state.

図7(A)〜(C)は、弾性部材6のプレート5の自由端側5b側に形成された平坦部6aが抵抗溶接されたプレート5が、固定端5a側をバックル4に隣接するように位置合わせしてバンド部材2の内周側に重ねあわせて、抵抗溶接により固定端5aが固定されている点が異なる。プレート5のバンド部材2への組み付け作業、及び締付けバンド1の締付け動作は、図6(A)〜(C)と同様である。   7A to 7C show that the plate 5 in which the flat portion 6a formed on the free end 5b side of the plate 5 of the elastic member 6 is resistance welded is adjacent to the buckle 4 on the fixed end 5a side. And the fixed end 5a is fixed by resistance welding so as to overlap the inner peripheral side of the band member 2. The assembling work of the plate 5 to the band member 2 and the tightening operation of the tightening band 1 are the same as those shown in FIGS.

上述した締付けバンド1を用いれば、プレート5とバンド部材2との隙間には、バンド部材2を縮径させた際にプレート5とバンド部材2との間で挟み込まれて弾性変形可能な弾性部材6がプレート6上に固定されているので、被締付け物の変形量に追従して弾性部材6を変形させることができ、バンド部材2を縮径させた際に弾性部材6を介して被締付け物に対して最適な締付け力を付与し弾性部材6から締付反力が得られるのでバンド部材2によるシール性を維持することができる。また、プレート5は、幅方向両側に径方向外側に向かって起立する一対の起立壁5cが長手方向に連続して設けられており、断面係数の高い補強構造を有しているので、曲げ応力に対して変形し難く、レバー3の傾倒によりプレート5が変形するおそれはない。   If the fastening band 1 described above is used, an elastic member that can be elastically deformed by being sandwiched between the plate 5 and the band member 2 when the band member 2 is reduced in diameter in the gap between the plate 5 and the band member 2. 6 is fixed on the plate 6, the elastic member 6 can be deformed following the amount of deformation of the object to be tightened, and tightened via the elastic member 6 when the band member 2 is reduced in diameter. Since an optimum tightening force is applied to the object and a tightening reaction force is obtained from the elastic member 6, the sealing performance by the band member 2 can be maintained. In addition, the plate 5 is provided with a pair of upstanding walls 5c that are erected outward in the radial direction on both sides in the width direction, and has a reinforcing structure with a high section modulus. However, the plate 5 is not likely to be deformed by the tilting of the lever 3.

また、プレート5は、固定端5aから自由端5bに向かって曲率が段階的に小さくなるように形成されているので、被締付け物の有効内径をできるだけ大きくすることができバンドの装着性が改善される。
また、弾性部材6は、プレート面に固定され、少なくとも外側バンド部材2に向かって凸になるように湾曲した複数の湾曲部6bを備えていると、被締付け物が変形し難い材質であったり、異形状であったりしても、バンド部材2を縮径させた際に湾曲部6bが弾性変形することで、締付反力の分布を均一にして最適な締付け力で締め付けることができる。
Further, since the plate 5 is formed so that the curvature gradually decreases from the fixed end 5a toward the free end 5b, the effective inner diameter of the object to be tightened can be increased as much as possible, and the band mounting property is improved. Is done.
The elastic member 6 may be made of a material that is difficult to deform when the elastic member 6 includes a plurality of curved portions 6b that are fixed to the plate surface and curved so as to be convex toward at least the outer band member 2. Even when the band member 2 is reduced in diameter, the curved portion 6b is elastically deformed when the band member 2 is reduced in diameter, so that the distribution of the tightening reaction force can be made uniform and the tightening can be performed with the optimum tightening force.

尚、プレート5に組み付けられる弾性部材6は平坦部6aが抵抗溶接されていたが、それ以外の方法で組み付けてもよい。たとえば、図8(A)に示すプレート5の第二湾曲部5Bの両側で起立する一対の起立壁5cには径方向に切り込みが形成されて一対の固定片5dが各々形成されている。プレート5の第二湾曲部5Bに弾性部材6を位置合わせして載置した状態で、図8(B)に示すように弾性部材6の湾曲部6bどうしの間に設けられた固定部6cに重なるように折り曲げて組み付けられていてもよい。   In addition, although the flat part 6a was resistance-welded the elastic member 6 assembled | attached to the plate 5, you may assemble | attach by the method of other than that. For example, the pair of standing walls 5c that stand on both sides of the second curved portion 5B of the plate 5 shown in FIG. 8A is formed with a notch in the radial direction to form a pair of fixed pieces 5d. With the elastic member 6 positioned and placed on the second curved portion 5B of the plate 5, the fixed portion 6c provided between the curved portions 6b of the elastic member 6 as shown in FIG. You may be bent and assembled so that it may overlap.

図9(A)に示すように、弾性部材6の中央部に形成された固定部6cに一対の固定片5dが折り曲げられて固定されたプレート5が、固定端5a側をバックル4に隣接するように位置合わせしてバンド部材2の内周側に重ねあわせて、抵抗溶接により固定端5aが固定される。このとき、図9(B)に示すようにプレート5の自由端5b側は、バンド部材2の接合部2aを跨いでバンド部材2の内周側に組み付けられる。プレート5が組み付けられた締付けバンド1を被締付け物(例えば樹脂製ブーツ)に嵌め込んで装着する。そして、図9(C)に示すように、レバー3を一端3aを支点としてバンド部材2に沿うように傾倒させ、他端3bがバックル4の一対の折り曲げ片4bの間に配置されるまで押し倒す。このとき、弾性部材6は、バンド部材2とプレート5によって挟み込まれて2カ所ある湾曲部6bが押し潰される。そして、一対の折り曲げ片4bをレバー3に上に折り曲げることにより、レバー3が固定され締付けバンド1が縮径状態で維持される。   As shown in FIG. 9A, the plate 5 in which the pair of fixing pieces 5d are bent and fixed to the fixing portion 6c formed at the central portion of the elastic member 6 is adjacent to the buckle 4 on the fixing end 5a side. Thus, the fixed end 5a is fixed by resistance welding after being aligned and superposed on the inner peripheral side of the band member 2. At this time, as shown in FIG. 9B, the free end 5 b side of the plate 5 is assembled to the inner peripheral side of the band member 2 across the joint portion 2 a of the band member 2. The fastening band 1 to which the plate 5 is assembled is fitted into an object to be fastened (for example, a resin boot). Then, as shown in FIG. 9C, the lever 3 is tilted along the band member 2 with the one end 3a as a fulcrum, and pushed down until the other end 3b is disposed between the pair of bent pieces 4b of the buckle 4. . At this time, the elastic member 6 is sandwiched between the band member 2 and the plate 5, and the two curved portions 6b are crushed. Then, by bending the pair of bent pieces 4b upward on the lever 3, the lever 3 is fixed and the fastening band 1 is maintained in a reduced diameter state.

尚、プレート5に対して弾性部材6は、組立治具どうしを位置合わせすれば、任意の位置に組み付けることができるが、プレート5に弾性部材6を位置決めする位置決め構造を備えていてもよい。
例えば、図10(A)に示すプレート5の第三湾曲部5Cにスリットを形成して先端が外周側に切起こされた切起し片5eが設けられていてもよい。図10(B)に示す弾性部材6を、図10(A)に示すプレート5の第二湾曲部5Bに載置する。このとき、図10(C)に示すように切起し片5eに弾性部材6の自由端5b側の平坦部6aを突き当てて弾性部材6をプレート5に対して位置決めしてから、当該平坦部6aを固定(抵抗溶接等)するようにしてもよい。
The elastic member 6 can be assembled at an arbitrary position as long as the assembly jigs are aligned with respect to the plate 5, but a positioning structure for positioning the elastic member 6 on the plate 5 may be provided.
For example, a cut-and-raised piece 5e having a slit formed in the third curved portion 5C of the plate 5 shown in FIG. The elastic member 6 shown in FIG. 10B is placed on the second curved portion 5B of the plate 5 shown in FIG. At this time, as shown in FIG. 10C, the flat portion 6a on the free end 5b side of the elastic member 6 is abutted against the cut piece 5e to position the elastic member 6 with respect to the plate 5, and then the flat portion The part 6a may be fixed (resistance welding or the like).

また、図11(A)に示すように、プレート5の第二湾曲部5Bの両側起立壁5cの起立元端部に一対の係止孔5fが設けられていてもよい。また、図11(B)に示すように弾性部材6の中央部に設けられた平坦部6aの両側縁部には、一対の係止孔5fに係止可能な一対の係止片6dが下方に向けて折り曲げ形成されていてもよい。図11(C)に示すように、プレート5の第二湾曲部5Bに、弾性部材6を一対の係止片6dが一対の係止孔5fに各々係止させて位置決めする。この状態で例えば中央部の平坦部6aにおいて抵抗熔接を行って弾性部材6がプレート5に固定されるようにしてもよい。   Moreover, as shown to FIG. 11 (A), a pair of latching hole 5f may be provided in the standing origin end part of the both-side standing wall 5c of the 2nd curved part 5B of the plate 5. FIG. Further, as shown in FIG. 11B, a pair of locking pieces 6d that can be locked in the pair of locking holes 5f are provided on both side edges of the flat portion 6a provided at the center of the elastic member 6. It may be bent toward the surface. As shown in FIG. 11C, the elastic member 6 is positioned on the second curved portion 5B of the plate 5 by the pair of locking pieces 6d being locked in the pair of locking holes 5f. In this state, the elastic member 6 may be fixed to the plate 5 by performing resistance welding in the flat portion 6a at the center, for example.

図12(A)に示すように、弾性部材6に設けられた湾曲部6bは中央の固定部6c(或いは平坦部6a)の両側に2カ所に設けられていたが、図12(B)に示すように、固定部6c(或いは平坦部6a)の一方側に1カ所の湾曲部6bを設け、他方側に2カ所の湾曲部6bを連続して設けてもよい。
また、弾性部材6は被締付け物の変形量を補う高さの湾曲部6bを備えているのが望ましく、プレート5の自由端5bから固定端5aにわたって高さが異なる複数の湾曲部6bが設けられていてもよい。これにより、被締付け物に対して変形量に応じて湾曲部6bが弾性変形することで、締付反力の分布を均一にして最適な締付け力で締め付けることができる。
As shown in FIG. 12A, the curved portion 6b provided on the elastic member 6 was provided at two locations on both sides of the central fixed portion 6c (or flat portion 6a). As shown, one bending portion 6b may be provided on one side of the fixing portion 6c (or the flat portion 6a), and two bending portions 6b may be continuously provided on the other side.
The elastic member 6 preferably includes a curved portion 6b having a height that compensates for the amount of deformation of the object to be fastened, and a plurality of curved portions 6b having different heights from the free end 5b to the fixed end 5a of the plate 5 are provided. It may be done. Accordingly, the bending portion 6b is elastically deformed according to the deformation amount with respect to the object to be tightened, so that the distribution of the tightening reaction force can be made uniform and the tightening can be performed with the optimum tightening force.

1 締付けバンド 2 バンド部材 2a 接合部 3 レバー 4 バックル 4a ベース部 4b 折り曲げ片 5 プレート 5a 固定端 5b 自由端 5c 起立壁 5d 固定片 5e 切起し片 5f 係止孔 5A 第一湾曲部 5B 第二湾曲部 5C 第三湾曲部 6 弾性部材 6a 平坦部 6b 湾曲部 6c 固定部 6d 係止片   DESCRIPTION OF SYMBOLS 1 Fastening band 2 Band member 2a Joint part 3 Lever 4 Buckle 4a Base part 4b Bending piece 5 Plate 5a Fixed end 5b Free end 5c Standing wall 5d Fixed piece 5e Cut-and-raised piece 5f Locking hole 5A First curved part 5B Second Bending portion 5C Third bending portion 6 Elastic member 6a Flat portion 6b Bending portion 6c Fixing portion 6d Locking piece

Claims (5)

金属帯状部材が環状に形成され両端の内周面が接合された接合部を有するバンド部材と、
前記接合部に固定され前記バンド部材の外周面に当接する一端側を支点として他端側を傾倒させることにより当該バンド部材を縮径させる弧状のレバーと、
前記バンド部材の内周面に固定されるベース部の両端から径方向外側に起立した折り曲げ部とからなり、前記バンド部材に傾倒した前記レバーを固定するバックルと、
前記バンド部材の内周面に前記バックルに隣接して固定端が固定されるとともに、前記レバーの傾倒により屈曲された前記バンド部材における前記接合部の内周側の隙間を円周方向に沿って覆うように自由端が弧状に延設された弧状のプレートとを備え、
前記レバーを前記バンド部材に沿うように傾倒させることで前記バンド部材を縮径させて被締付け物を締め付ける締付けバンドであって、
前記プレートは、前記固定端から自由端に向かって曲率が段階的に小さくなるように形成されており、前記プレートと前記バンド部材との隙間には、前記バンド部材を縮径させた際に前記プレートと前記バンド部材との間で挟み込まれて弾性変形可能な弾性部材が前記プレート上に固定されていることを特徴とする締付けバンド。
A band member having a joint portion in which a metal strip member is formed in an annular shape and inner peripheral surfaces of both ends are joined;
An arc-shaped lever that reduces the diameter of the band member by tilting the other end side with the one end side that is fixed to the joint portion and abutting the outer peripheral surface of the band member as a fulcrum,
A buckle that includes a bent portion that is erected radially outward from both ends of the base portion that is fixed to the inner peripheral surface of the band member, and that fixes the lever tilted to the band member;
A fixed end is fixed to the inner peripheral surface of the band member adjacent to the buckle, and a gap on the inner peripheral side of the joint portion in the band member bent by tilting the lever is along the circumferential direction. An arc plate with a free end extending in an arc shape so as to cover,
A tightening band for tightening an object to be tightened by reducing the diameter of the band member by tilting the lever along the band member,
The plate is formed such that the curvature gradually decreases from the fixed end toward the free end, and the gap between the plate and the band member is formed when the band member is reduced in diameter. A tightening band, wherein an elastic member that is sandwiched between a plate and the band member and is elastically deformable is fixed on the plate.
前記プレートの固定端側の第一湾曲部が前記バンド部材に倣った曲率R1を有し、当該第一湾曲部に連続して設けられた第二湾曲部がそれより大きい曲率R2を有し、当該第二湾曲部に連続して自由端側に設けられた第三湾曲部がそれより大きい曲率R3を有している請求項1記載の締付けバンド。   The first curved portion on the fixed end side of the plate has a curvature R1 that follows the band member, and the second curved portion provided continuously to the first curved portion has a larger curvature R2; The tightening band according to claim 1, wherein the third curved portion provided on the free end side continuously to the second curved portion has a larger curvature R3. 前記弾性部材は、前記プレート外周面に一端側が固定され、少なくとも外側バンド部材に向かって凸になるように湾曲した複数の湾曲部を備えている請求項1又は請求項2記載の締付けバンド。   The tightening band according to claim 1 or 2, wherein the elastic member includes a plurality of curved portions that are fixed at one end to the outer peripheral surface of the plate and curved so as to protrude toward at least the outer band member. 前記弾性部材に設けられた複数の湾曲部は、前記プレートの自由端から固定端に向かって高さが異なる湾曲部が設けられている請求項1乃至請求項3のいずれか1項記載の締付けバンド。   The tightening according to any one of claims 1 to 3, wherein the plurality of curved portions provided on the elastic member are provided with curved portions having different heights from a free end to a fixed end of the plate. band. 前記弾性部材は、ばね特性を有するステンレス系金属材が用いられる請求項1乃至請求項4のいずれか1項記載の締付けバンド。   The tightening band according to any one of claims 1 to 4, wherein a stainless steel metal material having spring characteristics is used for the elastic member.
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JPS595211Y2 (en) * 1978-06-07 1984-02-16 トヨタ自動車株式会社 One-touch connection band
JPS5962306U (en) * 1982-10-18 1984-04-24 キ−パ−株式会社 binding band
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US5713107A (en) * 1996-11-08 1998-02-03 Jan; I-Hwu Fastening belt
JP4127906B2 (en) * 1997-09-30 2008-07-30 Ntn株式会社 Constant velocity universal joint
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US8640815B2 (en) * 2011-02-10 2014-02-04 Honda Motor Company, Ltd. Boot assembly

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