JPH0388952A - Air cleaner hose coupling structure with resonator - Google Patents
Air cleaner hose coupling structure with resonatorInfo
- Publication number
- JPH0388952A JPH0388952A JP22527489A JP22527489A JPH0388952A JP H0388952 A JPH0388952 A JP H0388952A JP 22527489 A JP22527489 A JP 22527489A JP 22527489 A JP22527489 A JP 22527489A JP H0388952 A JPH0388952 A JP H0388952A
- Authority
- JP
- Japan
- Prior art keywords
- detaining
- resonator
- air cleaner
- hose
- arms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title 1
- 238000010168 coupling process Methods 0.000 title 1
- 238000005859 coupling reaction Methods 0.000 title 1
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000000071 blow moulding Methods 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、エアクリーナホース・レゾネータ締結構造に
関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an air cleaner hose resonator fastening structure.
〈従来の技術〉
昨今、エアクリーナホース（以下、単に「ホース」とい
うことがある。）は、吸気音低減の見地からレゾネータ
付きのものが多い。そして、ホース本体とレゾネータ本
体との従来における締結構造は、例えば、第７〜８図に
示す如くであった。<Prior Art> Recently, many air cleaner hoses (hereinafter simply referred to as "hose") are equipped with resonators to reduce intake noise. The conventional fastening structure between the hose body and the resonator body is as shown in FIGS. 7 and 8, for example.
前提的構成は、ホース本体１に雌筒部２が、レゾネータ
本体１１に謹筒部１２がそれぞれ、両本体１．１１が雌
筒部２と雄筒部１２との気密的嵌合により連通状態で締
結されているものである。The prerequisite configuration is that the hose body 1 and the resonator body 11 have the female cylinder part 2 and the resonator body 11 and the cylinder part 12, respectively. It has been concluded.
ここで、＠筒部２と雄筒部１２との気密的嵌合は、国側
では、雌筒部２の先端部内周に環状ガスケット４を装着
させ、該環状ガスケット４の内周に雄筒部１２を圧入し
て行なっている。上記ガスケット４の保持態様は、雌筒
部２の先端部内周に形成されたガスケット保持リブ２ａ
に、ガスケット４の外周に形成された嵌着溝４ａを嵌着
させる態様である。Here, the airtight fitting between the cylindrical part 2 and the male cylindrical part 12 is achieved by attaching an annular gasket 4 to the inner periphery of the tip of the female cylindrical part 2, and attaching the male cylinder to the inner periphery of the annular gasket 4. This is done by press-fitting the part 12. The gasket 4 is held by a gasket holding rib 2a formed on the inner periphery of the tip of the female cylinder portion 2.
In this embodiment, a fitting groove 4a formed on the outer periphery of the gasket 4 is fitted.
また、上記ホース本体１およびレゾネータ本体１１は、
通常、ポリプロピレン、ポリエチレン等の合成樹脂材料
により、前者は、主としてブロー成形により、後者は主
として上・下手割体をそれぞれ射出成形後溶融接着また
はブロー成形によりそれぞれ製造される。Further, the hose main body 1 and the resonator main body 11 are
Usually, the former is manufactured from synthetic resin materials such as polypropylene and polyethylene, and the former is mainly manufactured by blow molding, and the latter is mainly manufactured by injection molding of the upper and lower parts, respectively, followed by melt adhesion or blow molding.
そして、両本体１．１１の締結一体止は、両側フランジ
部２２を備えたＵ字状（ホース本体１の外周形状に対応
する。）の締結金具２１により行なっていた。即ち、締
結金具２１の両側フランジ部２２に形成されたねじ孔２
２ａを介して、レゾネータ本体１１に対応して形成され
たタッピングボス１３にタッピングねじ２３を螺子込む
。The two main bodies 1.11 are integrally fastened together using a U-shaped fastening fitting 21 (corresponding to the outer peripheral shape of the hose main body 1) having flanges 22 on both sides. That is, the screw holes 2 formed in both side flange portions 22 of the fastening fitting 21
A tapping screw 23 is screwed into a tapping boss 13 formed corresponding to the resonator main body 11 via 2a.
〈発明が解決しようとする課題〉
しかし、上記構成の締結構造の場合、締結具として締結
金具２１、タッピングねじ２３を使用するため、部品点
数が多くなるとともに、締結工数も嵩んだ。<Problems to be Solved by the Invention> However, in the case of the fastening structure having the above configuration, since the fastening fitting 21 and the tapping screw 23 are used as the fastening tools, the number of parts increases and the number of fastening man-hours also increases.
本発明は、上記問題点を解決することのできるエアクリ
ーナホース・レゾネータ締結構造を提供することを目的
とする。An object of the present invention is to provide an air cleaner hose/resonator fastening structure that can solve the above problems.
〈課題を解決するための手段〉
本発明のエアクリーナホース・レゾネータ締結構造は、
上記課題を下記構成により、解決するものである。<Means for solving the problems> The air cleaner hose/resonator fastening structure of the present invention has the following features:
The above problem is solved by the following configuration.
エアクリーナホース本体およびレゾネータ本体の一方に
雄筒部が、他方に雌部品が形成され、両本体が雄筒部と
雌部品との気密的な嵌合により連通状態として締結され
る構成のエアクリーナホース・レゾネータ締結構造にお
いて、
各本体にそれぞれ一体形成された係合アームと被係合凹
部とからなる締結用材が、各筒部の周辺位置で周方向に
対称的に２対以上形成され、係合アームの先端に形成さ
れた係合凸部が前記被係合凹部に係合アームのばね力で
係合することにより、前記両本体が締結一体止される、
ことを特徴とする。An air cleaner hose with a configuration in which a male cylindrical part is formed on one of the air cleaner hose main body and the resonator main body, and a female part is formed on the other, and both bodies are connected in a communicating state by airtight fitting of the male cylindrical part and the female part. In the resonator fastening structure, two or more pairs of fastening members each consisting of an engaging arm and an engaged recess integrally formed in each main body are formed symmetrically in the circumferential direction at a peripheral position of each cylindrical part, and the engaging arm The engaging convex portion formed at the tip of the engaging convex portion engages with the engaged concave portion by the spring force of the engaging arm, so that the two bodies are fastened together.
It is characterized by
〈実施例〉
本発明を実施例に基づいて、詳細に説明をするなお、従
来例と同一部分については、同−図符号を付して、それ
らの説明の全部又は一部を省略する。また従来例の変形
対応部分については同−図符号に接尾符号を付しである
。<Example> The present invention will be described in detail based on an example. Note that the same parts as in the conventional example are given the same reference numerals, and all or part of the explanation thereof will be omitted. Also, for parts corresponding to the modification of the conventional example, a suffix is added to the same reference numeral.
（１）実施例１（第１〜２図）：
従来同様、ホース本体ＩＡに雌部品２Ａが、レゾネータ
本体１１Ａに雄筒部１２がそれぞれ、両本体ＩＡ、ＩＩ
Ａが雌部品２Ａと雄筒部１２との気密的嵌合により連通
状態として締結される。(1) Example 1 (Figures 1 and 2): As in the conventional case, the female part 2A is attached to the hose body IA, and the male cylinder part 12 is attached to the resonator body 11A, and both bodies IA and II
The female part 2A and the male cylindrical part 12 are connected in a state of communication by airtight fitting.
上記構成において、ホース本体ＩＡに２個の被係合凹部
６が、レゾネータ本体１１に２個の係合アーム１６が、
それぞれ一体形成さｔ′１．、被係合凹部６と係合アー
ム１６とからなる締結用材が、各筒部２Ａ、１２の周辺
位置で線対称的に２対形成されている。具体的には、被
係合凹部６は、ホース本体成形時（ブロー成形時）＆：
インサートとして雌部品２Ａに沿って一体化されるＬ字
形ブラケット５の水平部に形成された矩形孔とされてい
る、そして、各係合アーム１６の先端に外側へ突出して
形成された係合凸１７が矩形孔６に係をアームのばね力
で係合することにより、前記両本体が締結される。係合
凸部１７の上面ｆ７ａは、矩形孔６に挿入嵌着しやすい
ように外側に向って下方への傾斜面とされている。なお
、レゾネータ本体１１Ａに形成する係合アーム１６は、
国側では上半割り部を射出成形するときに一体威形する
構成のものであるが、上記ホース本体ＩＡの成形時にに
おけるＬ字形ブラケット同様、インサートとしてレゾネ
ータ本体１１Ａに成形時一体止して構成してもよい。In the above configuration, the hose main body IA has two engaged recesses 6, the resonator main body 11 has two engaging arms 16,
each integrally formed t'1. Two pairs of fastening members each consisting of an engaged recess 6 and an engaging arm 16 are formed in a line-symmetrical manner around each cylindrical portion 2A, 12. Specifically, the engaged recess 6 is formed during hose body molding (blow molding) &:
A rectangular hole is formed in the horizontal part of the L-shaped bracket 5 that is integrated along the female part 2A as an insert, and an engagement convex is formed at the tip of each engagement arm 16 so as to protrude outward. 17 is engaged with the rectangular hole 6 by the spring force of the arm, thereby the two bodies are fastened together. The upper surface f7a of the engaging convex portion 17 is a downwardly inclined surface toward the outside so that it can be easily inserted and fitted into the rectangular hole 6. Note that the engagement arm 16 formed on the resonator main body 11A is
In the Japanese government, the upper half part is formed integrally when injection molded, but like the L-shaped bracket when molding the hose main body IA, it is constructed as an insert and integrally fixed to the resonator main body 11A during molding. You may.
次に、上記ホース本体ＩＡとレゾネータ本体１１Ａとを
締結一体止は、従来同様、ガスケット４が内周に装着さ
れたホース本体ＩＡの雌部品２Ａに、レゾネータ本体１
１Ａの雄筒部１２を圧入する際、同時的に、係合アーム
１６の係合凸部１７が被係合凹部である矩形孔６に、係
合アーム１６が内側方向に撓んだ後、ばね力で戻って係
合してワンタッチ的に行なわれる。Next, the hose main body IA and the resonator main body 11A are fastened together, as in the conventional case, by attaching the resonator main body 1 to the female part 2A of the hose main body IA with the gasket 4 attached to the inner periphery.
When press-fitting the male cylindrical portion 12 of 1A, at the same time, the engagement protrusion 17 of the engagement arm 16 is bent inward into the rectangular hole 6, which is the engaged recess, and then, The spring force returns and engages, allowing for one-touch operation.
（２）実施例２（３４３〜４図）：
本実施例は、上記実施例１において、レゾネータ本体ｔ
ｔＢに形成される係合アーム１６Ａを、係合凸部１７Ａ
を内側に向けて形成するとともに、ホース本体ＩＢに形
成される被係合凹部６Ａを直接的にホース本体ＩＢの雌
部品２Ｂの周壁に形成したものである。なお、被係合凹
部６Ａは、レゾネータ本体１１Ｂを射出成形時またはブ
ロー成形時、同時に成形する。(2) Example 2 (Figures 343-4): This example is based on the resonator body t in the above Example 1.
The engagement arm 16A formed at tB is connected to the engagement convex portion 17A.
The engagement recess 6A formed in the hose main body IB is formed directly on the peripheral wall of the female part 2B of the hose main body IB. The engaged recess 6A is formed at the same time as the resonator body 11B is injection molded or blow molded.
両本体ＩＢ、ＩＩＢの締結態様は、実施例１と同様であ
る。The manner in which the two main bodies IB and IIB are fastened is the same as in the first embodiment.
（３）実施例３（第５〜６図）：
本実施例は、上記実施例１において、係合アーム８をホ
ース本体１１Ｃ側に、係合アーム８に対応する係合凹部
１８をレゾネータ本体ｔｔＣ側に、それぞれ形成したも
のである。具体的には、先端部に係合凸部９が形成され
た係合アーム８はＬ字形ブラケット１５Ａのフランジ部
先端に形成され、被係合凹部８は、レゾネータ本体１１
Ｃの両側壁に形成されている。この被係合凹部８は、レ
ゾネータ本体１１Ｃを射出成形時またはブロー成形時、
同時に成形する。(3) Embodiment 3 (FIGS. 5 and 6): In this embodiment, in the above-mentioned Embodiment 1, the engagement arm 8 is placed on the hose body 11C side, and the engagement recess 18 corresponding to the engagement arm 8 is placed on the resonator body. They are respectively formed on the ttC side. Specifically, the engagement arm 8 having the engagement convex portion 9 formed at the tip thereof is formed at the tip of the flange portion of the L-shaped bracket 15A, and the engaged recess 8 is formed at the tip of the flange portion of the L-shaped bracket 15A.
It is formed on both side walls of C. This engaged recess 8 is formed when the resonator main body 11C is injection molded or blow molded.
mold at the same time.
両本体ＩＣ１ＩＩＣの締結態様は、実施例１と同様であ
る。The manner in which both main bodies IC1IIC are fastened is the same as in the first embodiment.
（４）上記各実施例では、雌部品２ （２Ａ）をホース
本体ＩＡ（ＩＢ、ＩＣ）側に、雄筒部１２をレゾネータ
本体１１ （ＩＩＡ、ＩＩＢ、ＩＩＣ）側に形成した
例であるが、雄筒部をホース本体側に、雌部品をレゾネ
ータ本体側に形成した例としてもよい。(4) In each of the above embodiments, the female part 2 (2A) is formed on the hose main body IA (IB, IC) side, and the male cylinder part 12 is formed on the resonator main body 11 (IIA, IIB, IIC) side. Alternatively, the male cylinder part may be formed on the hose body side, and the female part may be formed on the resonator body side.
また、締結用材は上記各実施例ではいずれも２対とした
が、要求締結強度に応じて３対以上としてもよい０例え
ば、実施例２（第３・４図）において、雌部品２Ｂを若
干長目にホース本体下方へ突出させ、該雌部品の下端部
外周壁に点対称的に３個以上の被係合凹部を形成すると
ともに、レゾネータの土壁に雄筒部の周囲で前記被係合
凹部に対応させて係合アームを形成すればよい。In addition, in each of the above embodiments, two pairs of fastening materials were used, but three or more pairs may be used depending on the required fastening strength.For example, in Example 2 (Figures 3 and 4), the female part 2B was The female component is made to protrude downwardly from the hose body, and three or more engaged recesses are formed point-symmetrically on the outer circumferential wall of the lower end of the female component, and the engaged recesses are formed on the earthen wall of the resonator around the male cylindrical section. The engagement arm may be formed to correspond to the mating recess.
〈発明の作用・効果〉
本発明のエアクリーナホース・レゾネータ締結構造は、
エアクリーナホース本体およびレゾネータ本体の一方に
雄筒部が、他方に雌部品が形成され、両本体が雄筒部と
雌部品との気密的な嵌合により連通状態として締結され
る構成のエアクリーナホース・レゾネータ締結構造にお
いて、各本体にそれぞれ一体形成された係合アームと被
係合凹部とからなる締結用材が、各筒部の周辺位置で対
称的に２対以上形成され、係合アームの先端に形成され
た係合凸部が被係合凹部へ係合アームのばね力で係合す
ることにより、両本体が締結−株化される、ことを特徴
とする構成であるので下記のよ４うな作用・効果を臭す
る。<Actions and Effects of the Invention> The air cleaner hose/resonator fastening structure of the present invention has the following features:
An air cleaner hose with a configuration in which a male cylindrical part is formed on one of the air cleaner hose main body and a resonator main body, and a female part is formed on the other, and both bodies are connected in a communicating state by airtight fitting of the male cylindrical part and the female part. In the resonator fastening structure, two or more pairs of fastening members each consisting of an engaging arm and an engaged recess integrally formed in each main body are formed symmetrically around each cylinder part, and the fastening members are formed symmetrically at the peripheral position of each cylindrical part, and are attached to the tip of the engaging arm. The structure is characterized in that the formed engaging convex portion engages with the engaged concave portion by the spring force of the engaging arm, so that the two main bodies are fastened together. Odor of action and effect.
ホース本体とレゾネータ本体との締結−株化は、一方の
本体の雌部品Ｃ１他方の本体の雄筒部を圧入する際、同
時的に、係合アームの係合凸部が被係合凹部に、係合ア
ームが撓んだ後ばね力で戻って係合して、ワンタッチ的
に行なわれる。To connect the hose body and the resonator body, when press-fitting the female part C1 of one body and the male cylindrical part of the other body, the engaging convex part of the engaging arm is simultaneously inserted into the engaged concave part. , the engagement arm is deflected and then returned to engage with the force of the spring, allowing for one-touch engagement.
従って、従来の如く、締結具としてのブラケット、タッ
ピングねじ等を使用しないため、部品点数が減少すると
ともに、タッピング締結における如く締結工数も嵩まな
い。Therefore, since brackets, tapping screws, etc. are not used as fasteners as in the past, the number of parts is reduced, and the number of man-hours required for fastening is not increased as in tapping fastening.
４１図は本発明の実施例１を示す分解斜視図、第２図は
実施例１におけるエアクリーナホース・レゾネータ締結
状態を示す断面図、
第３図は本発明の実施例２を示す分解斜視図、第４図は
実施例２におけるエアクリーナホース・レゾネータ締結
状態を示す断面図、
第５図は本発明の実施例３を示す分解斜視図、第６図は
実施例３におけるエアクリーナホース・レゾネータ締結
状態を示す断面図、
１Ｊ７図は従来例のエアクリーナホース・レゾネータ締
結構造を示す分解斜視図、
第８図は同じくエアクリーナホース・レゾネータ締結状
態を示す断面図である。
１、ＩＡ、ＩＢ、ＩＣ・・・ホース本体、２．２Ａ、２
Ｂ、２Ｃ・・・雌部品、
６．６Ａ・・・被係合凹部、
８・・・係合アーム、
９・・・係合凸部、
１１、ＩＩＡ、ＩＩＢ、ＩＩＣ・・・レゾネータ本体、
２・・・雄部部、
６．１６Ａ・・・係合アーム、
７．１７Ａ・・・係合凸部、
８・・・被係合凹部。
特
許 出 願 人
第
逸
第
図
第
５
図41 is an exploded perspective view showing Embodiment 1 of the present invention, FIG. 2 is a sectional view showing the air cleaner hose/resonator in a fastened state in Embodiment 1, and FIG. 3 is an exploded perspective view showing Embodiment 2 of the present invention. FIG. 4 is a cross-sectional view showing the air cleaner hose and resonator in the second embodiment, FIG. 5 is an exploded perspective view showing the third embodiment of the present invention, and FIG. 6 is the air cleaner hose and resonator in the third embodiment. FIG. 1J7 is an exploded perspective view showing a conventional air cleaner hose/resonator fastening structure, and FIG. 8 is a sectional view showing the air cleaner hose/resonator fastened state. 1, IA, IB, IC...hose body, 2.2A, 2
B, 2C...Female part, 6.6A...Engaged recess, 8...Engagement arm, 9...Engagement protrusion, 11, IIA, IIB, IIC...Resonator body, 2...Male portion, 6.16A...Engagement arm, 7.17A...Engagement protrusion, 8...Engaged recess. Patent Applicant Number Figure Figure 5
Claims (1)
雄筒部が、他方に雌筒部が形成され、両本体が前記雄筒
部と前記雌筒部との気密的な嵌合により連通状態として
締結される構成のエアクリーナホース・レゾネータ締結
構造において、前記各本体にそれぞれ一体形成された係
合アームと被係合凹部とからなる締結用材が、前記各筒
部の周辺位置で周方向に対称的に２対以上形成され、前
記係合アームの先端に形成された係合凸部が前記被係合
凹部へ前記係合アームのばね力で係合することにより、
前記両本体が締結一体化される、 ことを特徴とするエアクリーナホース・レゾネータ締結
構造。[Scope of Claims] A male cylindrical portion is formed in one of the air cleaner hose body and the resonator body, and a female cylindrical portion is formed in the other, and both bodies communicate with each other by airtight fitting between the male cylindrical portion and the female cylindrical portion. In the air cleaner hose/resonator fastening structure configured to be fastened as a state, a fastening material consisting of an engaging arm and an engaged recess formed integrally with each of the main bodies is arranged in a circumferential direction at a peripheral position of each of the cylindrical parts. Two or more pairs are symmetrically formed, and the engaging protrusion formed at the tip of the engaging arm engages with the engaged recess by the spring force of the engaging arm,
An air cleaner hose resonator fastening structure, characterized in that the two main bodies are fastened and integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22527489A JPH0388952A (en) | 1989-08-31 | 1989-08-31 | Air cleaner hose coupling structure with resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22527489A JPH0388952A (en) | 1989-08-31 | 1989-08-31 | Air cleaner hose coupling structure with resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0388952A true JPH0388952A (en) | 1991-04-15 |
Family
ID=16826758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22527489A Pending JPH0388952A (en) | 1989-08-31 | 1989-08-31 | Air cleaner hose coupling structure with resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0388952A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628256U (en) * | 1992-09-08 | 1994-04-15 | ダイハツ工業株式会社 | Intake duct |
| JP2003083186A (en) * | 2001-09-17 | 2003-03-19 | Inoac Corp | Noise reduced duct |
| FR2890701A1 (en) * | 2005-09-12 | 2007-03-16 | Renault Sas | ASSEMBLY COMPRISING A NOISE MITIGATION DEVICE AND AN AIR CONDUIT OF A MOTOR BLOCK CONNECTED BY CLOSURE-LOCKING |
| DE102019124980A1 (en) * | 2019-09-17 | 2021-03-18 | Mann+Hummel Gmbh | Line piece with acoustic component and acoustic component for a line piece |
-
1989
- 1989-08-31 JP JP22527489A patent/JPH0388952A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628256U (en) * | 1992-09-08 | 1994-04-15 | ダイハツ工業株式会社 | Intake duct |
| JP2003083186A (en) * | 2001-09-17 | 2003-03-19 | Inoac Corp | Noise reduced duct |
| FR2890701A1 (en) * | 2005-09-12 | 2007-03-16 | Renault Sas | ASSEMBLY COMPRISING A NOISE MITIGATION DEVICE AND AN AIR CONDUIT OF A MOTOR BLOCK CONNECTED BY CLOSURE-LOCKING |
| WO2007031680A1 (en) * | 2005-09-12 | 2007-03-22 | Renault S.A.S | Assembly comprising a noise attenuating device and an engine unit air duct sealingly connected by click-stop mechanism |
| DE102019124980A1 (en) * | 2019-09-17 | 2021-03-18 | Mann+Hummel Gmbh | Line piece with acoustic component and acoustic component for a line piece |
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