JP7210837B2

JP7210837B2 - hose clamp

Info

Publication number: JP7210837B2
Application number: JP2019109878A
Authority: JP
Inventors: 健朗田中
Original assignee: Piolax Inc
Current assignee: Piolax Inc
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2023-01-24
Anticipated expiration: 2039-06-12
Also published as: JP2020200914A

Description

本発明は、例えば、自動車の配管どうしを、ホースを用いて接続する際に用いられるホースクランプに関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose clamp used, for example, to connect pipes of automobiles using hoses.

従来、自動車の配管どうしを、ホースを用いて接続する際には、パイプ状をなす配管の端部外周に可撓性のホースを被せ、このホース外周を更にホースクランプによって締付けることによって、配管にホースを固定する方法が広く用いられている。 Conventionally, when connecting automobile pipes using a hose, a flexible hose is placed on the outer periphery of the end of the pipe-shaped pipe, and the outer periphery of the hose is further tightened with a hose clamp to connect the pipe. Methods of securing hoses are widely used.

例えば、下記特許文献１には、略円筒状に屈曲形成されたホースバンド本体と、このホースバンド本体の両端に設けられた第１つまみ片，第２つまみ片とを有する、ホースバンドが記載されている。前記ホースバンド本体の両側には、点対称の位置に、ほぼ同じ幅で形成された幅狭部がそれぞれ設けられており、一方の幅狭部の内側に、親指状に内方へ延びる、第１係止爪が突出形成されており、他方の幅狭部の内側に、小指状に内方へ延びる、第２係止爪が突出形成されている（段落００１１参照）。そして、第１係止爪と第２係止爪とを係合させることで、ホースバンド本体が拡径状態となり、第１係止爪と第２係止爪との係合を解除することで、ホースバンド本体が縮径状態となり、ホースが締付け固定されるようになっている。 For example, Patent Literature 1 below describes a hose band having a hose band body that is bent into a substantially cylindrical shape, and first and second grip pieces provided at both ends of the hose band body. ing. On both sides of the hose band main body, narrow portions having substantially the same width are provided at point-symmetrical positions. One locking claw protrudes, and a second locking claw extending inward like a little finger is formed on the inner side of the other narrow portion (see paragraph 0011). Then, by engaging the first locking claw and the second locking claw, the hose band main body is in a diameter-expanded state, and by releasing the engagement between the first locking claw and the second locking claw, , the hose band main body is reduced in diameter, and the hose is tightened and fixed.

特開平１０－３１８４７４号公報JP-A-10-318474

上記特許文献１のホースバンドでは、ホース外周を囲むホースバンド本体の、両側に設けた各幅狭部の内側から、第１係止爪及び第２係止爪がそれぞれ突出しているため、両係止爪どうしが係合した状態では、一方の幅狭部の内側と、他方の幅狭部の内側との間に、比較的大きな隙間が形成される（特許文献１の図７参照）。この隙間の部分では、ホースバンドにより締付け圧力が作用しにくいため、配管とホースとの締付け固定力が低下して、配管とホースとのシール性が低下するおそれがあった。 In the hose band disclosed in Patent Document 1, the first locking claw and the second locking claw protrude from the inner sides of the narrow width portions provided on both sides of the hose band main body surrounding the outer periphery of the hose. When the claws are engaged with each other, a relatively large gap is formed between the inner side of one narrow portion and the inner side of the other narrow portion (see FIG. 7 of Patent Document 1). Since the hose band makes it difficult for the tightening pressure to act on this gap portion, the tightening force between the pipe and the hose may be reduced, and the sealing performance between the pipe and the hose may be reduced.

したがって、本発明の目的は、ホースクランプを縮径させた状態において、配管とホースとのシール性を向上させることができる、ホースクランプを提供することにある。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hose clamp capable of improving the sealing performance between a pipe and a hose in a state where the diameter of the hose clamp is reduced.

上記目的を達成するため、本発明のホースクランプは、環状に湾曲されてなり、ホースの外周を囲むように装着される板バネ本体と、該板バネ本体の周方向両端部に設けられた一対のツマミ部とを有し、前記板バネ本体は、前記一対のツマミ部が離反した状態で縮径し、前記一対のツマミ部を近接させたときに拡径するように構成されており、前記板バネ本体は、前記ホースの周方向に沿って所定長さで延びる基部と、該基部の周方向一端側で且つ軸方向一側から延びる第１腕部と、前記基部の周方向他端側で且つ軸方向他側から延びる第２腕部とを有しており、前記一対のツマミ部は、前記第１腕部の先端から外径方向に向けて折曲されて延びる第１ツマミ部と、前記第２腕部の先端から外径方向に向けて折曲されて延びる第２ツマミ部とからなり、前記第２ツマミ部の、前記第１腕部側の側縁部に、切欠き部が形成されており、前記第１ツマミ部には、前記切欠き部に係止して、前記板バネ本体を拡径状態にさせる係止部が形成されており、前記板バネ本体が縮径した状態で、前記板バネ本体を外径方向から見たときに、前記係止部の、前記第２腕部側の軸方向外面は、前記切欠き部の軸方向内面よりも、前記第２腕部側に位置するように設けられていることを特徴とする。 In order to achieve the above object, the hose clamp of the present invention comprises a leaf spring body which is curved in an annular shape and is mounted so as to surround the outer periphery of the hose, and a pair of spring spring bodies provided at both ends in the circumferential direction of the leaf spring body. and a knob portion, and the leaf spring main body is configured to contract in diameter when the pair of knob portions are separated from each other, and to expand in diameter when the pair of knob portions are brought close to each other, and The leaf spring main body includes a base portion extending along the circumferential direction of the hose for a predetermined length, a first arm portion extending from one end side in the circumferential direction of the base portion in the axial direction, and the other end side in the circumferential direction of the base portion. and a second arm portion extending from the other side in the axial direction, and the pair of knob portions are bent and extend radially outward from the tip of the first arm portion. , and a second knob portion that is bent and extends radially outward from the tip of the second arm portion. is formed in the first knob portion, and an engaging portion that engages with the notch portion to cause the leaf spring main body to expand in diameter is formed, and the leaf spring main body is formed in a contracted diameter In this state, when the leaf spring main body is viewed from the outer diameter direction, the axial outer surface of the locking portion on the second arm side is located closer to the second arm than the axial inner surface of the notch. It is characterized in that it is provided so as to be positioned on the arm side.

本発明のホースクランプによれば、板バネ本体が縮径した状態から一対のツマミ部を摘んで近接させて、係止部を切欠き部に係止させると、一対のツマミ部が軸方向に離反する方向に位置ずれした状態で係止して、第１腕部及び第２腕部が軸方向に離反する方向に位置ずれする構成となっているので、板バネ本体が縮径した状態での、第１腕部及び第２腕部どうしの隙間を最大限狭くすることができ、ホースクランプで締付け固定する配管とホースとのシール性を向上させることができる。 According to the hose clamp of the present invention, when the pair of knobs are pinched and brought close to each other in a state in which the diameter of the leaf spring main body is contracted, and the engaging portion is engaged with the notch, the pair of knobs are axially moved. Since the first arm portion and the second arm portion are locked in a state of being displaced in the separating direction, the positions of the first arm portion and the second arm portion are displaced in the direction of separating in the axial direction. In addition, the gap between the first arm and the second arm can be made as narrow as possible, and the sealing performance between the hose and the pipe clamped and fixed by the hose clamp can be improved.

本発明に係るホースクランプの一実施形態を示しており、縮径状態の斜視図である。1 shows an embodiment of a hose clamp according to the present invention, and is a perspective view in a diameter-reduced state; FIG. 同ホースクランプの拡径状態の斜視図である。It is a perspective view of the diameter expansion state of the same hose clamp. 図１とは異なる方向から見た場合の、ホースクランプの縮径状態での拡大斜視図である。FIG. 2 is an enlarged perspective view of the hose clamp in a diameter-reduced state when viewed from a direction different from that of FIG. 1; 同ホースクランプの展開図である。It is an expanded view of the same hose clamp. （ａ）はホースクランプの縮径状態における正面図、（ｂ）はホースクランプの縮径状態における平面図である。(a) is a front view of the hose clamp in a diameter-reduced state, and (b) is a plan view of the hose clamp in a diameter-reduced state. （ａ）はホースクランプの拡径状態における正面図、（ｂ）はホースクランプの拡径状態における平面図である。(a) is a front view of the hose clamp in a diameter-expanded state, and (b) is a plan view of the hose clamp in the diameter-expanded state. 同ホースクランプを縮径状態から拡径させる際の、要部拡大説明図である。FIG. 4 is an enlarged explanatory view of a main part when the hose clamp is expanded from a contracted state. 図７の状態から更にホースクランプを拡径させた際の、要部拡大説明図である。FIG. 8 is an enlarged explanatory view of a main part when the diameter of the hose clamp is further expanded from the state of FIG. 7; 同ホースクランプを拡径状態から縮径させる際の、第１工程を示す要部拡大説明図である。FIG. 4 is an enlarged explanatory view of a main part showing a first step when the diameter of the hose clamp is reduced from an expanded state. 同ホースクランプを拡径状態から縮径させる際の、第２工程を示す要部拡大説明図である。FIG. 5 is an enlarged explanatory view of a main part showing a second step when the diameter of the hose clamp is reduced from an expanded state. 同ホースクランプを拡径状態から縮径させる際の、第３工程を示す要部拡大説明図である。FIG. 11 is an enlarged explanatory view of a main part showing a third step when the diameter of the hose clamp is reduced from the expanded state. 同ホースクランプを拡径状態から縮径させる際の、第４工程を示す要部拡大説明図である。FIG. 11 is an enlarged explanatory view of a main part showing a fourth step when the diameter of the hose clamp is reduced from the expanded state. 本発明に係るホースクランプの他の実施形態を示しており、縮径状態の斜視図である。Fig. 10 shows another embodiment of a hose clamp according to the present invention, and is a perspective view in a diameter-reduced state; 同ホースクランプの拡径状態の斜視図である。It is a perspective view of the diameter expansion state of the same hose clamp.

以下、図１～１２を参照して、本発明に係るホースクランプの一実施形態について説明する。 An embodiment of a hose clamp according to the present invention will be described below with reference to FIGS. 1 to 12. FIG.

例えば、自動車等の内部では各種の配管が配設されているが、これらの配管どうしを連結するため、ゴム等の材質からなる可撓性のホースが採用されている。図１に示すように、本発明のホースクランプ１０（以下、単に「クランプ１０」ともいう）は、パイプやチューブ等の配管１の一端部に被せられたホース５の外周に配置されて、該ホース５の外周を締付けて、配管１にホース５を固定するために用いられるものである。 For example, various types of pipes are installed inside automobiles and the like, and flexible hoses made of a material such as rubber are used to connect these pipes. As shown in FIG. 1, a hose clamp 10 (hereinafter also simply referred to as "clamp 10") of the present invention is arranged on the outer periphery of a hose 5 covering one end of a piping 1 such as a pipe or tube to It is used to fix the hose 5 to the pipe 1 by tightening the outer circumference of the hose 5 .

図１に示すように、この実施形態におけるクランプ１０は、図４に示すような帯状の金属板を所定形状に打抜き、かつ、屈曲させることにより形成されるものであって、環状に湾曲されてなり、ホース５の外周を囲むように装着される板バネ本体２０と、この板バネ本体２０の周方向両端に設けられた、一対のツマミ部３０，５０とを有し、板バネ本体２０は、一対のツマミ部３０，５０が離反した状態で縮径し、一対のツマミ部３０，５０を近接させたときに拡径するように構成されている。この実施形態では、板バネ本体２０の周方向一端に、第１ツマミ部３０が設けられており、板バネ本体２０の周方向他端に、第２ツマミ部５０が設けられている。なお、板バネ本体２０と、一対のツマミ部３０，５０とは、ステンレスやバネ鋼材等の金属材料によって、一体形成されている。 As shown in FIG. 1, a clamp 10 in this embodiment is formed by punching a strip-shaped metal plate as shown in FIG. It has a leaf spring body 20 mounted so as to surround the outer periphery of the hose 5 and a pair of knobs 30 and 50 provided at both ends of the leaf spring body 20 in the circumferential direction. , the diameter is reduced when the pair of knob portions 30 and 50 are separated from each other, and the diameter is increased when the pair of knob portions 30 and 50 are brought closer to each other. In this embodiment, a first knob portion 30 is provided at one circumferential end of the leaf spring body 20 , and a second knob portion 50 is provided at the other circumferential end of the leaf spring body 20 . The leaf spring main body 20 and the pair of knobs 30 and 50 are integrally formed of a metal material such as stainless steel or spring steel.

図１～３に示すように、板バネ本体２０は、ホース５の周方向に沿って所定長さで延びる基部２１と、該基部２１の周方向Ｄ（図４参照）の一端側で且つ軸方向Ｅ（図４参照）の一側Ｅ１（以下、単に「軸方向Ｅ１側」ともいう）から延びる第１腕部２３と、基部２１の周方向Ｄの他端側で且つ軸方向Ｅの他側Ｅ２（以下、単に「軸方向Ｅ２側」ともいう）から延びる第２腕部２５とを有している。いわば、図４に示すように、第１腕部２３及び第２腕部２５は、基部２１の中心Ｃ１（周方向Ｄの中央で且つ軸方向Ｅの中央）に対して、点対称となる位置に設けられている。 As shown in FIGS. 1 to 3, the leaf spring main body 20 includes a base portion 21 extending along the circumferential direction of the hose 5 with a predetermined length, and an axial portion at one end side of the base portion 21 in the circumferential direction D (see FIG. 4). A first arm portion 23 extending from one side E1 (hereinafter also simply referred to as "axial direction E1 side") in the direction E (see FIG. 4), and the other end side of the base portion 21 in the circumferential direction D and other than the axial direction E. and a second arm portion 25 extending from the side E2 (hereinafter also simply referred to as the “axial direction E2 side”). In other words, as shown in FIG. 4, the first arm portion 23 and the second arm portion 25 are positioned point-symmetrically with respect to the center C1 of the base portion 21 (the center in the circumferential direction D and the center in the axial direction E). is provided in

なお、以下の説明において、「周方向」とは、配管１やホース５の周方向に沿った方向を意味するが、配管１やホース５の外周に対する接線に沿った方向も含む意味である（符号「Ｄ」として説明する）。同じく以下の説明において、「軸方向」とは、ホースクランプにより締付け固定するホース５や配管１の軸心に沿った方向と同じ方向を意味しており、幅方向ともいえる（符号「Ｅ」として説明する）。また、上記の周方向Ｄ及び軸方向Ｅは、基部２１以外の、一対のツマミ部３０，５０、更には、後述する係止部４０や、切欠き部６０等においても同様である。 In the following description, "circumferential direction" means a direction along the circumferential direction of the pipe 1 or hose 5, but also includes a direction along a tangential line to the outer periphery of the pipe 1 or hose 5 ( (referred to as code "D"). Similarly, in the following description, the "axial direction" means the same direction as the direction along the axis of the hose 5 or the pipe 1 clamped and fixed by the hose clamp, and can also be said to be the width direction (as symbol "E" explain). In addition, the circumferential direction D and the axial direction E described above are the same for the pair of knob portions 30 and 50 as well as the locking portion 40 and the notch portion 60 described later, other than the base portion 21 .

そして、上記板バネ本体２０は、図１，図３，図５に示すように、一対のツマミ部３０，５０が離反した状態で縮径した自由状態となり、図２や図６に示すように、一対のツマミ部３０，５０を近接させたときに弾性力に抗して拡径するように構成されている。 As shown in FIGS. 1, 3 and 5, the leaf spring main body 20 is in a free state in which the diameter of the leaf spring main body 20 is reduced when the pair of knob portions 30 and 50 are separated from each other, and as shown in FIGS. , the diameter is expanded against the elastic force when the pair of knob portions 30 and 50 are brought close to each other.

また、図４に示すように、第１腕部２３及び第２腕部２５は、基部２１の側縁部２１ａから中心線Ｌ（板バネ本体２０の軸方向Ｅの中央であって周方向Ｄに平行な線）までの長さよりもやや幅狭で、かつ、一定幅で延びている。更に、第１腕部２３及び第２腕部２５は、同一幅で基部２１から延出している。なお、図４に示すように、第１腕部２３の、軸方向Ｅ１側の側縁部２３ａ、及び、第２腕部２５の、軸方向Ｅ２側の側縁部２５ａは、基部２１の両側縁部２１ａ，２１ａに対して、段差や切欠き等がないように直線状に連続している（面一となっている）。 As shown in FIG. 4, the first arm portion 23 and the second arm portion 25 extend from the side edge portion 21a of the base portion 21 to the center line L (the center of the leaf spring body 20 in the axial direction E and in the circumferential direction D). It is slightly narrower than the length to the line parallel to ) and extends with a constant width. Further, the first arm portion 23 and the second arm portion 25 extend from the base portion 21 with the same width. Note that, as shown in FIG. 4 , a side edge portion 23a of the first arm portion 23 on the side of the axial direction E1 and a side edge portion 25a of the second arm portion 25 on the side of the axial direction E2 are located on both sides of the base portion 21. The edge portions 21a, 21a are linearly continuous (flush with each other) without steps or notches.

また、基部２１の、周方向Ｄの一端側で且つ軸方向Ｅ１側、及び、周方向Ｄの他端側で且つ軸方向Ｅ２側には、基部２１を次第に幅狭とするテーパ部２２，２２がそれぞれ形成されており、基部２１から第１腕部２３及び第２腕部２５に至る応力分布の急激な変化を緩和するようになっている。 Further, tapered portions 22, 22 which gradually narrow the width of the base portion 21 are provided on one end side of the circumferential direction D and on the axial direction E1 side of the base portion 21, and on the other end side of the circumferential direction D and on the axial direction E2 side of the base portion 21. are formed, respectively, to alleviate sudden changes in stress distribution from the base portion 21 to the first arm portion 23 and the second arm portion 25 .

なお、この実施形態における第１腕部２３及び第２腕部２５は同一幅で形成されているが、例えば、一方の腕部を、他方の腕部に対して幅狭又は幅広に形成してもよく、両腕部が、基部の板幅（軸方向Ｅに沿った長さ）の範囲内で設けられていればよい。 Although the first arm portion 23 and the second arm portion 25 in this embodiment are formed to have the same width, for example, one arm portion may be formed narrower or wider than the other arm portion. Alternatively, both arms may be provided within the width of the base (the length along the axial direction E).

また、第１腕部２３及び第２腕部２５は、図５（ａ）に示すように、板バネ本体２０が縮径した自由状態で、板バネ本体２０を軸方向Ｅから見たときに、板バネ本体２０の周方向Ｄに重なり合い、かつ、図５（ｂ）に示すように、板バネ本体２０を外径方向から見たときに、板バネ本体２０の軸方向Ｅに重ならないように構成されている。なお、「外径方向」とは、クランプの軸心Ｃ２から外径側に向う方向を意味する。また、「外径方向から見る」とは、クランプを、外径側から軸心Ｃ２に向かう方向に見ることを意味する。 As shown in FIG. 5A, the first arm portion 23 and the second arm portion 25 are in a free state in which the diameter of the leaf spring body 20 is reduced, and when the leaf spring body 20 is viewed from the axial direction E. , overlap in the circumferential direction D of the leaf spring body 20, and do not overlap in the axial direction E of the leaf spring body 20 when viewed from the outer diameter direction, as shown in FIG. is configured to In addition, the "outer diameter direction" means the direction from the axial center C2 of the clamp toward the outer diameter side. Moreover, "viewed from the outer diameter direction" means that the clamp is viewed from the outer diameter side toward the axis C2.

そして、第１腕部２３及び第２腕部２５は、板バネ本体２０が縮径した自由状態では、図５（ｂ）に示すように、第１腕部２３の軸方向Ｅ２側の側縁部２３ｂ（軸方向Ｅ２側に向く側縁部）と、第２腕部２５の軸方向Ｅ１側の側縁部２５ｂ（軸方向Ｅ１側に向く側縁部）とが、板バネ本体２０の軸方向Ｅに位置ずれし、かつ、軸方向Ｅに隣接して配置されるようになっている。この実施形態では、第１腕部２３及び第２腕部２５の側縁部２３ｂ，２５ｂは互いに平行に配置されることとなり、これらの側縁部２３ｂ，２５ｂの間に、一定幅の隙間Ｋが板バネ本体２０の周方向Ｄに沿って形成されるようになっている（図５（ｂ）参照）。 In the free state in which the leaf spring main body 20 is contracted in diameter, the first arm portion 23 and the second arm portion 25 extend along the side edge of the first arm portion 23 in the axial direction E2 as shown in FIG. 5(b). The portion 23b (the side edge facing the axial direction E2 side) and the side edge portion 25b (the side edge facing the axial direction E1 side) of the second arm portion 25 on the axial direction E1 side form the axis of the leaf spring main body 20. They are displaced in the direction E and arranged adjacent to each other in the axial direction E. As shown in FIG. In this embodiment, the side edge portions 23b and 25b of the first arm portion 23 and the second arm portion 25 are arranged parallel to each other, and there is a gap K of a constant width between these side edge portions 23b and 25b. is formed along the circumferential direction D of the plate spring body 20 (see FIG. 5(b)).

また、図５（ａ）に示すように、前記第２ツマミ部５０は、第２腕部２５の延出方向の先端から、外径方向に向けて折曲されて延びる形状をなしている。そして、図５（ｂ）に示すように、この第２ツマミ部５０の、第１腕部２３側の側縁部５１（軸方向Ｅ１側に向く側縁部）に、切欠き部６０が形成されている。 Further, as shown in FIG. 5A, the second knob portion 50 has a shape extending from the tip of the second arm portion 25 in the extending direction while being bent toward the outer diameter direction. Then, as shown in FIG. 5B, a notch portion 60 is formed in a side edge portion 51 (a side edge portion facing the axial direction E1 side) of the second knob portion 50 on the first arm portion 23 side. It is

図３や図５を併せて参照すると、この実施形態における第２ツマミ部５０は、第２腕部２５の延出方向の先端から、基部２１の外径方向に向けて、所定角度で折曲して延びる折曲部５３を有している。この折曲部５３は、第２腕部２５の接線Ｓ（図５（ａ）参照）に対して鈍角をなすように折曲している。更に、この折曲部５３の延出方向先端からは、第１ツマミ部３０とは離れる方向に向けて、第２腕部２５の接線Ｓに対してほぼ平行となるように（図５（ａ）参照）、延出部５５が延びている。 3 and 5, the second knob portion 50 in this embodiment is bent at a predetermined angle from the tip of the second arm portion 25 in the extending direction toward the outer diameter direction of the base portion 21. It has a bent portion 53 that extends in a straight line. The bent portion 53 is bent at an obtuse angle with respect to the tangent line S (see FIG. 5A) of the second arm portion 25 . Furthermore, from the leading end of the bending portion 53 in the extending direction, it extends in a direction away from the first knob portion 30 so as to be substantially parallel to the tangent line S of the second arm portion 25 (FIG. 5(a)). )), the extension 55 extends.

また、図３や図５（ｂ）に示すように、延出部５５の延出方向先端であって、第１腕部２３側の側縁部５１からは、軸方向Ｅ１側に突出する、操作部５７が設けられている。なお、この操作部５７は、基部２１の軸方向Ｅ１側の側縁部２１ａに至る長さで突出している。 Further, as shown in FIGS. 3 and 5(b), from the side edge portion 51 on the side of the first arm portion 23, which is the leading end of the extending portion 55 in the extending direction, protrudes in the axial direction E1. An operation unit 57 is provided. The operating portion 57 protrudes with a length reaching the side edge portion 21a of the base portion 21 on the axial direction E1 side.

また、図３に示すように、切欠き部６０は、第２ツマミ部５０の、第１腕部２３側の側縁部５１に形成されているが、第２ツマミ部５０の板厚方向Ｔ（図５（ａ）参照）の両側が開口すると共に、第２ツマミ部５０の側縁部５１側が開口するように、切欠かれた形状となっている。 Further, as shown in FIG. 3 , the notch portion 60 is formed in the side edge portion 51 of the second knob portion 50 on the first arm portion 23 side. (See FIG. 5(a)) and the side edge portion 51 side of the second knob portion 50 is opened.

図４の部分拡大図を併せて参照すると、この実施形態の切欠き部６０は、周方向Ｄの両側に互いに平行に配置された一対の周方向内面６１，６２と、これらの一対の周方向内面６１，６２の軸方向Ｅ２側の端部どうしを連結すると共に、周方向Ｄに延びる軸方向内面６３とを有しており、周方向Ｄに長く延び軸方向Ｅに短い略コ字溝状をなしている。なお、切欠き部６０の軸方向内面６３は、軸方向Ｅ１側に向く内面となっている。 4, the notch 60 of this embodiment includes a pair of circumferential inner surfaces 61 and 62 arranged parallel to each other on both sides in the circumferential direction D, and a pair of circumferential inner surfaces 61 and 62 arranged parallel to each other. It has an axial inner surface 63 extending in the circumferential direction D, which connects the ends of the inner surfaces 61 and 62 on the side of the axial direction E2, and has a substantially U-shaped groove extending long in the circumferential direction D and short in the axial direction E. is making Note that an axial inner surface 63 of the notch portion 60 is an inner surface facing in the axial direction E1.

また、上記周方向内面６１は、第２ツマミ部５０の先端側（第２ツマミ部５０の延出方向先端側）に位置し、周方向内面６２は、第２ツマミ部５０の基端側（第２ツマミ部５０の延出方向基端側、すなわち、第２腕部２５の先端寄りの箇所）に位置する。 The circumferential inner surface 61 is located on the distal end side of the second knob portion 50 (the distal end side in the extending direction of the second knob portion 50), and the circumferential inner surface 62 is positioned on the proximal end side of the second knob portion 50 ( It is positioned on the base end side of the second knob portion 50 in the extending direction, that is, on the tip side of the second arm portion 25).

なお、上記実施形態の切欠き部６０は、第２ツマミ部５０の板厚方向Ｔの両側が開口し、かつ、第２ツマミ部５０の側縁部５１側が開口しているが、切欠き部としては、例えば、第２ツマミ部５０の板厚方向Ｔの一側のみを開口した凹溝状をなしていてもよく、係止部が係止可能な形状であれば特に限定はされない。 Note that the notch 60 of the above embodiment is open on both sides of the second knob 50 in the plate thickness direction T, and is also open on the side edge 51 side of the second knob 50 . For example, the second knob portion 50 may have a concave groove shape that is open only on one side in the plate thickness direction T, and there is no particular limitation as long as the locking portion has a shape that allows locking.

また、図３や図５（ａ）に示すように、第２ツマミ部５０の、切欠き部６０の周縁には、第２ツマミ部５０の板厚方向Ｔに凹んだ凹部６５が形成されており、この凹部６５に前記切欠き部６０が設けられている。すなわち、第２ツマミ部５０の切欠き部６０の周縁であって、第２ツマミ部５０の板厚方向Ｔの外面（配管１やホース５から離反した面）側から、板厚方向Ｔの内面（配管１やホース５に近接した面）側に向けて、所定深さで凹んだ、凹部６５が形成されている。また、図３及び図５（ｂ）に示すように、この凹部６５は、軸方向Ｅに延びる軸方向内面６６と、周方向Ｄに延びる周方向内面６７とを有している。 As shown in FIGS. 3 and 5A, a recess 65 recessed in the plate thickness direction T of the second knob 50 is formed in the periphery of the notch 60 of the second knob 50. The recess 65 is provided with the notch 60 . That is, from the outer surface of the second knob 50 in the plate thickness direction T (the surface away from the pipe 1 and the hose 5) at the periphery of the notch portion 60 of the second knob 50, the inner surface in the plate thickness direction T A concave portion 65 is formed with a predetermined depth toward the side (the surface close to the pipe 1 and the hose 5). 3 and 5B, the recess 65 has an axial inner surface 66 extending in the axial direction E and a circumferential inner surface 67 extending in the circumferential direction D. As shown in FIGS.

更に図４や図５（ｂ）に示すように、第２ツマミ部５０の、第１腕部２３側の側縁部２５ｂ（第２腕部２５の軸方向Ｅ１側の側縁部２５ｂ）には、切欠き部６０に向けて、第１腕部２３に近づくように突出する、ガイド部７０が設けられている。この実施形態におけるガイド部７０は、周方向Ｄに沿って切欠き部６０に向かいつつ、第１腕部２３側に向けて軸方向Ｅ１に次第に突出するような、緩やかな曲面状をなすように形成されている。また、図５（ｂ）に示すように、板バネ本体２０が縮径して、一対のツマミ部３０，５０が離反した状態で、上記ガイド部７０は、係止部４０に対して、軸方向Ｅにおいて重なる（ラップする）位置となるように設けられている。 Furthermore, as shown in FIGS. 4 and 5B, the side edge 25b of the second knob 50 on the first arm 23 side (side edge 25b on the axial direction E1 side of the second arm 25) is provided with a guide portion 70 protruding toward the notch portion 60 so as to approach the first arm portion 23 . The guide portion 70 in this embodiment has a gently curved shape that gradually protrudes in the axial direction E1 toward the first arm portion 23 side while facing the notch portion 60 along the circumferential direction D. formed. Further, as shown in FIG. 5(b), when the leaf spring body 20 is reduced in diameter and the pair of knob portions 30 and 50 are separated from each other, the guide portion 70 is axially aligned with the locking portion 40. They are provided so as to overlap (lap) in direction E. As shown in FIG.

一方、図５（ａ）に示すように、前記第１ツマミ部３０は、第１腕部２３の延出方向の先端から、外径方向に向けて折曲されて延びる形状となっている。 On the other hand, as shown in FIG. 5(a), the first knob portion 30 has a shape extending from the leading end of the first arm portion 23 in the extending direction while being bent toward the outer diameter direction.

図３を併せて参照すると、この実施形態における第１ツマミ部３０は、第１腕部２３の延出方向先端から、基部２１の外径方向に向けて折曲し、かつ、所定長さで延びる折曲部３３を有している。図４に示すように、この折曲部３３の延出方向先端側に、切欠き３２を介して係止部４０が形成されている。この実施形態の係止部４０は、第１ツマミ部３０の、第２腕部２３側の側縁部３１から、軸方向Ｅに突出し、かつ、周方向Ｄに延びており、図６（ａ）に示すように、その先端４５が、前記切欠き部６０に係止するように構成されている。 Referring also to FIG. 3, the first knob portion 30 in this embodiment is bent from the leading end of the first arm portion 23 in the extending direction toward the outer diameter direction of the base portion 21, and has a predetermined length. It has an extending bent portion 33 . As shown in FIG. 4, a locking portion 40 is formed through a notch 32 on the leading end side of the bending portion 33 in the extending direction. The locking portion 40 of this embodiment protrudes in the axial direction E and extends in the circumferential direction D from the side edge portion 31 of the first knob portion 30 on the second arm portion 23 side. ), the tip 45 thereof is configured to engage with the notch 60 .

より具体的には、この実施形態の係止部４０は、図３、図４、及び図５に示すように、折曲部３３の延出方向先端側から、第２腕部２５側に向けて軸方向Ｅ２に所定長さで突出する突出部４１と、該突出部４１の突出方向先端から、突出部４１に対して直交するように屈曲し、かつ、第２ツマミ部５０側に向けて延びる延出部４３（ここでは図５（ａ）に示すように、第１腕部２３の接線Ｓに対してほぼ平行に延びている）と、この延出部４３の延出方向先端の下面側（第１ツマミ部３０側に近接する面側）から、板バネ本体２０の内径方向に向けて突出した先端４５とを有しており、全体としてクランプの周方向及び内径方向に突設した形状のフック状をなしている。なお、前記の「内径方向」とは、クランプの外径側から軸心Ｃ２に向かう方向を意味する。また、図６（ａ）に示すように、係止部４０の先端４５が、切欠き部６０の、第２ツマミ部５０の基端側の周方向内面６２に係止して、板バネ本体２０の縮径状態が維持されるようになっている。 More specifically, as shown in FIGS. 3, 4, and 5, the locking portion 40 of this embodiment extends from the distal end side of the bending portion 33 in the extending direction toward the second arm portion 25 side. a projecting portion 41 projecting a predetermined length in the axial direction E2, and a projecting end of the projecting portion 41 that is bent perpendicularly to the projecting portion 41 and directed toward the second knob portion 50. Extending extending portion 43 (here, as shown in FIG. 5A, extending substantially parallel to tangent line S of first arm portion 23), and the lower surface of the extending direction tip of this extending portion 43 and a tip end 45 projecting in the radial direction of the plate spring main body 20 from the side (the side close to the first knob portion 30 side), and projecting in the circumferential direction and the radial direction of the clamp as a whole. It has a hook shape. The "inner diameter direction" means the direction from the outer diameter side of the clamp toward the axis C2. Further, as shown in FIG. 6A, the distal end 45 of the engaging portion 40 is engaged with the circumferential inner surface 62 of the notch portion 60 on the base end side of the second knob portion 50, and the leaf spring main body is engaged. 20 is maintained.

更に図６（ａ）に示すように、係止部４０の先端４５であって、第２ツマミ部５０側の周方向外面（第２ツマミ部５０に近い周方向Ｄ側の面）には、テーパ面４５ａが形成されている。このテーパ面４５ａは、係止部４０の延出方向先端の下面側（第１腕部２３側に近接する面側）から、板バネ本体２０の内径方向に向けて、先端４５を次第に幅狭とする傾斜面となっている。また、図９に示すように、このテーパ面４５ａは、一対のツマミ部３０，５０を近接させるように摘んだ際に、切欠き部６０の、第２ツマミ部５０の先端側の周方向内面６１に当接可能となっている。更に、先端４５の最先端４５ｂには、円弧状をなしたＲ状面が形成されている。 Furthermore, as shown in FIG. 6(a), on the distal end 45 of the locking portion 40, on the circumferential outer surface on the side of the second knob portion 50 (the surface on the circumferential direction D side close to the second knob portion 50), A tapered surface 45a is formed. The tapered surface 45 a gradually narrows the tip 45 toward the inner diameter direction of the plate spring body 20 from the lower surface side (surface side close to the first arm portion 23 side) of the extending direction tip of the locking portion 40 . It is an inclined surface. Further, as shown in FIG. 9, the tapered surface 45a forms a circumferential inner surface of the notch 60 on the distal end side of the second knob 50 when the pair of knobs 30 and 50 are pinched so as to be close to each other. 61 can be abutted. Further, the distal end 45b of the tip 45 is formed with an arcuate R-shaped surface.

なお、係止部としては、上記のようなフック状のみならず、例えば、第１ツマミ部先端から折曲して外径方向に延びる折曲部の先端から、斜め内方に向けて帯状に延びるような形状としたり、第１ツマミ部近傍から切り起こし状に形成してもよく（これについては後述の実施形態で詳述する）、切欠き部に係止可能な形状であれば特に限定はされない。 In addition to the hook shape as described above, the locking portion may also be formed in a strip shape extending diagonally inward from the tip of the bent portion that is bent from the tip of the first knob portion and extends in the outer diameter direction. It may have a shape that extends, or it may be formed in a cut-and-raised shape from the vicinity of the first knob portion (this will be described in detail in the embodiments described later), and it is particularly limited if it has a shape that can be locked to the notch portion. is not done.

また、一対のツマミ部の形状としては、上記形状に限定されるものではなく、プライヤやペンチ等の工具などによって摘むことが可能な形状・構造であればよい。 Also, the shape of the pair of knobs is not limited to the shape described above, and may be any shape and structure that allows the user to pick it up with a tool such as pliers or pliers.

そして、このクランプ１０においては、図５（ｂ）に示すように、板バネ本体２０が縮径した状態で、板バネ本体２０を外径方向から見たときに、係止部４０の、第２腕部２５側の軸方向外面４７（軸方向Ｅ２側に向く面）は、切欠き部６０の軸方向内面６３（軸方向Ｅ１側に向く面）よりも、第２腕部２５側に位置するように設けられている。なお、図５（ｂ）に示すように、第２ツマミ部５０に形成した凹部６５の周方向内面６７は、係止部４０の、第２腕部２５側の軸方向外面４７よりも、第１腕部２３側に位置するように設けられている。 In this clamp 10, as shown in FIG. 5(b), when the leaf spring body 20 is viewed from the outer diameter direction with the leaf spring body 20 contracted in diameter, the locking portion 40 is positioned at the first position. The axial outer surface 47 (the surface facing the axial direction E2 side) on the second arm portion 25 side is located closer to the second arm portion 25 than the axial inner surface 63 (the surface facing the axial direction E1 side) of the notch portion 60 . It is designed to As shown in FIG. 5B, the circumferential inner surface 67 of the recess 65 formed in the second knob portion 50 is located further than the axial outer surface 47 of the locking portion 40 on the second arm portion 25 side. It is provided so as to be positioned on the one arm portion 23 side.

上記のように、係止部４０の、第２腕部２５側の軸方向外面４７を設けたことで、板バネ本体２０を拡径した状態に保持すべく、図５（ｂ）に示す板バネ本体２０の縮径状態から、一対のツマミ部３０，５０を板バネ本体２０の周方向Ｄに近接させて、図６（ａ）に示すように、係止部４０を切欠き部６０に係止させると（ここでは係止部４０の先端４５を、切欠き部６０の周方向内面６２に係止させる）、図６（ｂ）に示すように、一対のツマミ部３０が，５０が軸方向Ｅ１，Ｅ２側に互いに離反する方向に位置ずれした状態で係止して、板バネ本体２０が拡径状態に保持されるようになっている。 As described above, by providing the axial outer surface 47 of the locking portion 40 on the side of the second arm portion 25, the plate spring body 20 is held in a diameter-expanded state. From the diameter-reduced state of the spring body 20, the pair of knobs 30 and 50 are brought close to each other in the circumferential direction D of the leaf spring body 20, and as shown in FIG. When engaged (in this case, the tip 45 of the engaging portion 40 is engaged with the circumferential inner surface 62 of the notch 60), the pair of knobs 30 and 50 are connected to each other as shown in FIG. 6(b). The leaf spring main body 20 is held in a diameter-expanded state by being engaged in a state of being displaced in the axial directions E1 and E2 so as to separate from each other.

具体的には、図６（ｂ）の板バネ本体２０の拡径状態における第１ツマミ部３０は、図５（ｂ）の板バネ本体２０の縮径状態における第１ツマミ部３０よりも、軸方向Ｅ１側に位置ずれし、図６（ｂ）の板バネ本体２０の拡径状態における第２ツマミ部５０も、図５（ｂ）の板バネ本体２０の縮径状態における第２ツマミ部５０よりも、軸方向Ｅ２側に位置ずれする。すなわち、第１腕部２３及び第２腕部２５は、その弾性力に抗して、軸方向Ｅ１又はＥ２に強制的に撓み変形させられた状態で、一対のツマミ部３０，５０が係止して、板バネ本体２０が拡径状態に保持されている。その結果、第１腕部２３及び第２腕部２５には、軸方向Ｅに互いに近接する方向に戻ろうとする弾性復元力（すなわち、第１腕部２３には軸方向Ｅ２側への弾性復元力、第２腕部２５には軸方向Ｅ１側への弾性復元力）が作用した状態となっている。 Specifically, the first knob portion 30 in the expanded diameter state of the leaf spring body 20 in FIG. The second knob portion 50 is displaced in the axial direction E1, and the second knob portion 50 in the enlarged diameter state of the leaf spring main body 20 in FIG. 50, the position is shifted to the side in the axial direction E2. That is, the first arm portion 23 and the second arm portion 25 are forcibly bent and deformed in the axial direction E1 or E2 against their elastic force, and the pair of knob portions 30 and 50 are locked. As a result, the leaf spring main body 20 is held in a diameter-expanded state. As a result, the first arm portion 23 and the second arm portion 25 have an elastic restoring force that tends to return in the direction of approaching each other in the axial direction E (that is, the first arm portion 23 has an elastic restoring force toward the axial direction E2 side). A force (an elastic restoring force in the axial direction E1) acts on the second arm portion 25 .

次に、上記構成からなるクランプ１０を用いて、ゴム等の材質からなる可撓性のホース５を、パイプ等の配管１に締め付け固定する際の手順について説明する。 Next, a procedure for tightening and fixing the flexible hose 5 made of a material such as rubber to the piping 1 such as a pipe using the clamp 10 having the above configuration will be described.

まず、図１や図３に示すように、一対のツマミ部３０，５０が周方向Ｄに互いに離反して、板バネ本体２０が縮径した状態から、一対のツマミ部３０，５０をプライヤやペンチ等の工具を摘んで周方向Ｄに近接させていく。 First, as shown in FIGS. 1 and 3, the pair of knobs 30 and 50 are separated from each other in the circumferential direction D, and the leaf spring main body 20 is contracted in diameter. A tool such as pliers is pinched and brought closer in the circumferential direction D.

このとき、この実施形態においては、図５（ｂ）に示すように、第２ツマミ部５０の、第１腕部２３側の側縁部２５ｂには、切欠き部６０に向けて、第１腕部２３に近づくように突出する、ガイド部７０が設けられている。そのため、一対のツマミ部３０，５０を板バネ本体２０の周方向Ｄに近接させると、図７に示すように、係止部４０の先端４５のテーパ面４５ａがガイド部７０に当接し、ガイド部７０によって、テーパ面４５ａが押圧されて、第１ツマミ部３０を軸方向Ｅ１側に位置ずれさせつつ、第１腕部２３を撓み変形させていく。その後、係止部４０の先端４５が切欠き部６０に至ると、図８に示すように、軸方向Ｅ１側に撓み変形した第１腕部２３が、軸方向Ｅ２側に弾性復帰して、係止部４０の先端４５が、切欠き部６０の側方開口（側縁部５１側の開口）から入り込んで、先端４５が、切欠き部６０の周方向内面６２に係合して（図６（ａ）参照）、板バネ本体２０が拡径状態に維持される。 At this time, in this embodiment, as shown in FIG. A guide portion 70 is provided to protrude toward the arm portion 23 . Therefore, when the pair of knob portions 30 and 50 are brought close to the leaf spring main body 20 in the circumferential direction D, the tapered surface 45a of the tip 45 of the locking portion 40 comes into contact with the guide portion 70 as shown in FIG. The taper surface 45a is pressed by the portion 70, and the first arm portion 23 is bent and deformed while the position of the first knob portion 30 is shifted in the axial direction E1. After that, when the tip 45 of the engaging portion 40 reaches the notch portion 60, the first arm portion 23, which has been flexurally deformed in the axial direction E1, elastically returns in the axial direction E2, as shown in FIG. The tip 45 of the locking portion 40 enters from the side opening of the notch 60 (the opening on the side edge 51 side), and engages with the circumferential inner surface 62 of the notch 60 (see FIG. 6(a)), the leaf spring main body 20 is maintained in the expanded state.

上記のように、この実施形態においては、上記形状をなしたガイド部７０を設けたことにより、板バネ本体２０が縮径した状態から、一対のツマミ部３０，５０を摘んで近接させていくと、ガイド部７０によって係止部４０がガイドされて、一対のツマミ部３０，５０を軸方向Ｅに離反する方向に位置ずれさせることができるので、係止部４０を切欠き部６０にスムーズに係止させることができ、板バネ本体２０を縮径状態から拡径させる際の、作業性を向上させることができる。 As described above, in this embodiment, since the guide portion 70 having the shape described above is provided, the pair of knob portions 30 and 50 are pinched and brought closer together from the state in which the leaf spring body 20 is contracted in diameter. Then, the engaging portion 40 is guided by the guide portion 70, and the pair of knob portions 30 and 50 can be displaced in the axial direction E so that the engaging portion 40 is smoothly aligned with the notch portion 60. , and workability can be improved when the diameter of the leaf spring body 20 is expanded from the diameter-reduced state.

次いで、配管１の一端部外周に装着されたホース５の外周に、拡径状態のクランプ１０を配置した後、一対のツマミ部３０，５０を上記のような適当な工具で摘んで、一対のツマミ部３０，５０を周方向Ｄに更に近接させる。すると、図９に示すように、係止部４０の先端４５のテーパ面４５ａが、切欠き部６０の周方向内面６１に当接するので、図９の矢印に示すように、切欠き部６０の板厚方向Ｔの一端開口（第１腕部２３から離反する開口）から、係止部４０の先端４５を抜き出すような力が作用して、図１０に示すように、切欠き部６０から係止部４０の先端４５が徐々に抜け出る。その後、係止部４０の先端４５が切欠き部６０から完全に抜け出ると、係止部４０と切欠き部６０との係止状態が解除される。 Next, after placing the clamp 10 in a diameter-expanded state on the outer periphery of the hose 5 attached to the outer periphery of one end of the pipe 1, the pair of knobs 30 and 50 are gripped with the appropriate tool as described above, and the pair of The knob portions 30 and 50 are further brought closer in the circumferential direction D. Then, as shown in FIG. 9, the tapered surface 45a of the tip 45 of the engaging portion 40 abuts against the circumferential inner surface 61 of the notch portion 60, so that the notch portion 60 is closed as indicated by the arrow in FIG. A force is applied to extract the tip 45 of the locking portion 40 from one end opening (opening away from the first arm portion 23) in the plate thickness direction T, and as shown in FIG. The tip 45 of the stop portion 40 is gradually pulled out. After that, when the tip 45 of the locking portion 40 is completely removed from the notch portion 60, the locked state between the locking portion 40 and the notch portion 60 is released.

このとき、この実施形態においては、係止部４０が切欠き部６０に係止して、板バネ本体２０が拡径した状態から、一対のツマミ部３０，５０を摘んで近接させると、係止部４０のテーパ面４５ａが、切欠き部６０の、第２ツマミ部５０の先端側の周方向内面６１に当接して、切欠き部６０から係止部４０を徐々に抜き出させて、係止解除させることができるので、板バネ本体２０を拡径状態から縮径させる際の、作業性を向上させることができる。 At this time, in this embodiment, when the engaging portion 40 is engaged with the notch portion 60 and the leaf spring main body 20 is expanded in diameter, the pair of knob portions 30 and 50 are pinched and brought closer to each other. The tapered surface 45a of the stop portion 40 abuts against the circumferential inner surface 61 of the notch portion 60 on the distal end side of the second knob portion 50, gradually extracting the engaging portion 40 from the notch portion 60, Since the locking can be released, workability can be improved when the diameter of the leaf spring main body 20 is reduced from the diameter expanded state.

また、この実施形態においては、第２ツマミ部５０の、切欠き部６０の周縁には、板厚方向Ｔに凹んだ凹部６５が形成されており、該凹部６５には、軸方向Ｅに延びる軸方向内面６６と、周方向に延びる周方向内面６７とを有している。そのため、上述したように、係止部４０が切欠き部６０に係止して、板バネ本体２０が拡径した状態から、一対のツマミ部３０，５０を摘んで近接させる際に、一対のツマミ部３０，５０を過度に摘んでも、係止部４０の先端４５のテーパ面４５ａが凹部６５の軸方向内面６６に当接するため、一対のツマミ部３０，５０を過度に摘んでしまうことを抑制することができる。 In this embodiment, a recess 65 recessed in the plate thickness direction T is formed in the peripheral edge of the notch 60 of the second knob 50, and the recess 65 extends in the axial direction E. It has an axial inner surface 66 and a circumferentially extending inner circumferential surface 67 . Therefore, as described above, when the engaging portion 40 is engaged with the notch portion 60 and the diameter of the leaf spring main body 20 is expanded, when the pair of knob portions 30 and 50 are pinched and brought close to each other, the pair of Even if the knobs 30, 50 are excessively pinched, the tapered surface 45a of the tip 45 of the locking portion 40 contacts the axial inner surface 66 of the recess 65, so that the pair of knobs 30, 50 are prevented from being excessively pinched. can be suppressed.

上記のように、係止部４０と切欠き部６０との係止状態が解除されると、軸方向Ｅ１側に強制的に撓み変形させられた状態の第１腕部２３が弾性復帰して、軸方向Ｅ２側に位置ずれして、図１１に示すように、係止部４０の先端４５の軸方向外面４７が、切欠き部６０の周方向内面６７に当接する。その後、一対のツマミ部３０，５０が離反する方向に弾性復元力が作用し、図１２に示すように、係止部４０の先端４５の最先端４５ｂが、凹部６５の底面に摺接しながら、切欠き部６０の周方向内面６７に、係止部４０の先端４５の軸方向外面４７がガイドされていく。そして、凹部６５から係止部４０が外れて、板バネ本体２０が縮径することで、図１に示すように、クランプ１０によってホース５を締付けて配管１に固定することができる。 As described above, when the locking state between the locking portion 40 and the notch portion 60 is released, the first arm portion 23, which has been forcibly flexurally deformed in the axial direction E1, is elastically restored. , and the axial outer surface 47 of the tip 45 of the engaging portion 40 contacts the circumferential inner surface 67 of the notch 60 as shown in FIG. Thereafter, an elastic restoring force acts in the direction in which the pair of knob portions 30 and 50 move away from each other, and as shown in FIG. The axial outer surface 47 of the tip 45 of the locking portion 40 is guided by the circumferential inner surface 67 of the notch portion 60 . 1, the hose 5 can be fixed to the pipe 1 by clamping the hose 5 with the clamp 10, as shown in FIG.

また、この実施形態においては、第２ツマミ部５０の、切欠き部６０の周縁に形成した凹部６５には、軸方向Ｅに延びる周方向内面６７を有している。そのため、係止部４０が切欠き部６０に係止して、板バネ本体２０が拡径した状態から、一対のツマミ部３０，５０を摘んで近接させて、切欠き部６０から係止部４０を抜き出して、板バネ本体２０を縮径させる際に、係止部４０が再び切欠き部６０に係止することを抑制できる。更に図１１に示すように、係止部４０を凹部６５の周方向内面６７に当接させて、係止部４０が軸方向Ｅへ大きくずれることを抑制することができると共に、凹部６５の周方向内面６７で係止部４０をガイドさせつつ、板バネ本体２０を縮径させることができ、板バネ本体２０の縮径作業を確実かつ安全に行うことができる。 Further, in this embodiment, the concave portion 65 of the second knob portion 50 formed on the periphery of the notch portion 60 has a circumferential inner surface 67 extending in the axial direction E. As shown in FIG. Therefore, from the state in which the engaging portion 40 is engaged with the notch portion 60 and the diameter of the leaf spring main body 20 is expanded, the pair of knob portions 30 and 50 are pinched and brought close to each other, and the engaging portion is moved from the notch portion 60 to the engaging portion. When the leaf spring main body 20 is contracted by extracting the leaf spring 40, it is possible to prevent the engaging portion 40 from being engaged with the notch portion 60 again. Furthermore, as shown in FIG. 11 , by bringing the locking portion 40 into contact with the circumferential inner surface 67 of the recess 65 , it is possible to suppress the locking portion 40 from being greatly displaced in the axial direction E, and It is possible to reduce the diameter of the leaf spring body 20 while guiding the engaging portion 40 with the direction inner surface 67, and the diameter reduction operation of the leaf spring body 20 can be performed reliably and safely.

そして、このクランプ１０においては、図５（ｂ）に示すように、板バネ本体２０が縮径した状態で、板バネ本体２０を外径方向から見たときに、係止部４０の、第２腕部２５側の軸方向外面４７は、切欠き部６０の軸方向内面６３よりも、第２腕部２５側に位置するように設けられている。そのため、上述したように、板バネ本体２０が縮径した状態から一対のツマミ部３０，５０を摘んで近接させて、係止部４０を切欠き部６０に係止させると、図６（ｂ）に示すように、一対のツマミ部３０，５０が軸方向Ｅに離反する方向に位置ずれした状態で係止して、板バネ本体２０が拡径状態に保持されると共に、第１腕部２３及び第２腕部２５が軸方向Ｅに離反する方向に位置ずれようになっている。そのため、板バネ本体２０が縮径した状態での、第１腕部２３及び第２腕部２５どうしの隙間Ｋを最大限狭くすることができ、クランプ１０で締付け固定する配管１とホース５とのシール性を向上させることができる。なお、本発明とは逆に、板バネ本体２０を縮径状態から拡径状態にさせる際に、第１腕部２３及び第２腕部２５が軸方向Ｅに近づく構成だと、第１腕部２３及び第２腕部２５の干渉を抑制するために、板バネ本体２０の縮径状態において、第１腕部２３及び第２腕部２５の隙間をある程度確保しなければならないので、シール性に問題が生じる。 In this clamp 10, as shown in FIG. 5(b), when the leaf spring body 20 is viewed from the outer diameter direction with the leaf spring body 20 contracted in diameter, the locking portion 40 is positioned at the first position. The axial outer surface 47 on the second arm portion 25 side is provided so as to be located closer to the second arm portion 25 side than the axial inner surface 63 of the notch portion 60 . Therefore, as described above, when the pair of knob portions 30 and 50 are pinched and brought close to each other from the state in which the leaf spring main body 20 is contracted in diameter, and the locking portion 40 is locked to the notch portion 60, as shown in FIG. ), the pair of knobs 30 and 50 are engaged in a state of being displaced in the axial direction E so that the leaf spring main body 20 is held in the enlarged diameter state, and the first arm portion 23 and the second arm portion 25 are displaced in the axial direction E in a direction away from each other. Therefore, the gap K between the first arm portion 23 and the second arm portion 25 can be made as narrow as possible when the leaf spring main body 20 is contracted in diameter, and the pipe 1 and the hose 5 which are clamped and fixed by the clamp 10 can be narrowed as much as possible. can improve the sealing performance. Contrary to the present invention, if the first arm portion 23 and the second arm portion 25 approach the axial direction E when the leaf spring main body 20 is made to expand from the contracted state, the first arm In order to suppress interference between the portion 23 and the second arm portion 25, it is necessary to secure a certain amount of clearance between the first arm portion 23 and the second arm portion 25 when the leaf spring main body 20 is contracted. problems arise.

また、この実施形態においては、図３に示すように、係止部４０は、第１ツマミ部３０の、第２腕部２３側の側縁部３１から、軸方向Ｅに突出し、かつ、周方向Ｄに延びており、図６（ａ）に示すように、その先端４５が、前記切欠き部６０に係止するように構成されている。そのため、板バネ本体２０が縮径した状態での、第１腕部２３及び第２腕部２５どうしの、隙間Ｋが狭い箇所を、周方向Ｄに長く確保することができ、クランプ１０による配管１とホース５とのシール性を、より向上させることができる。 In this embodiment, as shown in FIG. 3, the locking portion 40 protrudes in the axial direction E from the side edge portion 31 of the first knob portion 30 on the side of the second arm portion 23, and extends circumferentially. It extends in the direction D, and as shown in FIG. Therefore, it is possible to ensure that the narrow gap K between the first arm portion 23 and the second arm portion 25 is long in the circumferential direction D when the leaf spring main body 20 is contracted in diameter. The sealing performance between 1 and hose 5 can be further improved.

図１３及び図１４には、本発明に係るホースクランプの、他の実施形態が示されている。なお、前記実施形態と実質的に同一部分には同符号を付してその説明を省略する。 13 and 14 show another embodiment of the hose clamp according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

この実施形態のホースクランプ１０Ａ（以下、「クランプ１０Ａ」という）は、係止部の構造が、前記実施形態と異なっている。 A hose clamp 10A (hereinafter referred to as "clamp 10A") of this embodiment differs from the above-described embodiment in the structure of the engaging portion.

すなわち、図１３に示すように、第１ツマミ部３０の側縁部３１側であって、折曲部３３に隣接した位置に、外径方向に向けて切り起こして形成された、切り起こし状の係止部４０Ａが設けられている。そして、図１４に示すように、この係止部４０Ａが、第２ツマミ部５０側の切欠き部６０に係止して、板バネ本体２０の拡径状態が保持されるようになっている。なお、このクランプ１０Ａにおいても、板バネ本体２０が縮径した状態で、板バネ本体２０を外径方向から見たときに、係止部４０の、第２腕部２５側の軸方向外面４７は、切欠き部６０の軸方向内面６３よりも、第２腕部２５側に位置するように設けられている（図１３参照）。 That is, as shown in FIG. 13, at a position adjacent to the bent portion 33 on the side edge portion 31 side of the first knob portion 30, a cut-and-raised shape is formed by cutting and raising in the outer diameter direction. is provided with a locking portion 40A. Then, as shown in FIG. 14, this engaging portion 40A is engaged with the notch portion 60 on the side of the second knob portion 50, so that the leaf spring main body 20 is maintained in the enlarged diameter state. . Also in this clamp 10A, when the leaf spring main body 20 is viewed from the outer diameter direction with the leaf spring main body 20 contracted in diameter, the axial outer surface 47 of the locking portion 40 on the second arm portion 25 side is is located closer to the second arm portion 25 than the axial inner surface 63 of the notch portion 60 (see FIG. 13).

そのため、前記実施形態と同様に、板バネ本体２０が縮径した状態での、第１腕部２３及び第２腕部２５どうしの隙間Ｋを最大限狭くすることができ、クランプ１０Ａで締付け固定する配管１とホース５とのシール性を向上させることができる。 Therefore, as in the above-described embodiment, the gap K between the first arm portion 23 and the second arm portion 25 can be made as narrow as possible when the leaf spring main body 20 is contracted in diameter, and the clamp 10A is used to tighten and fix it. The sealing property between the pipe 1 and the hose 5 can be improved.

なお、本発明は、上述した実施形態に限定されるものではなく、本発明の要旨の範囲内で、各種の変形実施形態が可能であり、そのような実施形態も本発明の範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

１０，１０Ａホースクランプ（クランプ）
２０板バネ本体
２１基部
２３第１腕部
２５第２腕部
３０第１ツマミ部
３１側縁部
４０，４０Ａ係止部
４５先端
４５ａテーパ面
４７軸方向外面
５０第２ツマミ部
５１側縁部
６０切欠き部
６１，６２周方向内面
６３軸方向内面
６５凹部
６６軸方向内面
６７周方向内面
７０ガイド部 10, 10A hose clamp (clamp)
20 leaf spring main body 21 base 23 first arm 25 second arm 30 first knob 31 side edge 40, 40A locking portion 45 tip 45a tapered surface 47 axial outer surface 50 second knob 51 side edge 60 Notch portions 61 and 62 Circumferential inner surface 63 Axial inner surface 65 Recessed portion 66 Axial inner surface 67 Circumferential inner surface 70 Guide portion

Claims

The leaf spring body is curved in an annular shape and has a leaf spring body mounted so as to surround the outer periphery of the hose, and a pair of knobs provided at both ends of the leaf spring body in the circumferential direction. The pair of knobs are configured to contract in diameter when they are separated from each other, and to expand in diameter when the pair of knobs are brought closer to each other,
The leaf spring main body includes a base portion extending along the circumferential direction of the hose for a predetermined length, a first arm portion extending from one end side in the circumferential direction of the base portion in the axial direction, and the other end in the circumferential direction of the base portion. and a second arm extending from the other side in the axial direction,
The pair of knob portions includes a first knob portion that extends radially outward by bending from the tip of the first arm portion, and a first knob portion that extends radially outwardly from the tip of the second arm portion. and a second knob portion extending,
A notch is formed in a side edge of the second knob on the side of the first arm,
The first knob portion is formed with an engagement portion that engages with the notch portion to expand the diameter of the leaf spring main body,
When the leaf spring body is viewed from the outer diameter direction with the leaf spring body contracted in diameter, the axial outer surface of the locking portion on the side of the second arm portion extends in the axial direction of the notch portion. A hose clamp, wherein the hose clamp is provided so as to be located closer to the second arm portion than the inner surface.

2. A guide portion is provided on a side edge portion of the second knob portion on the side of the first arm portion so as to protrude toward the notch portion side so as to approach the first arm portion. Hose clamp as described.

The locking portion protrudes in the axial direction and extends in the circumferential direction from a side edge portion of the first knob portion on the side of the second arm portion, and the tip thereof is locked to the notch portion. 3. A hose clamp according to claim 1 or 2, configured to:

A tapered surface is formed on a circumferential outer surface on the second knob side at the tip of the locking portion,
4. The hose clamp according to any one of claims 1 to 3, wherein the tapered surface can come into contact with a circumferential inner surface of the notch portion located on the tip side of the second knob portion.

A concave portion recessed in the plate thickness direction is formed in the peripheral edge of the notch portion of the second knob portion,
The hose clamp according to any one of claims 1 to 4, wherein the recess has a circumferentially extending inner surface and an axially extending inner surface.