JP7633895B2

JP7633895B2 - Soundproof cover

Info

Publication number: JP7633895B2
Application number: JP2021118823A
Authority: JP
Inventors: 考一保坂; 一輝中根
Original assignee: Inoac Corp
Current assignee: Inoac Corp
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2025-02-20
Anticipated expiration: 2041-07-19
Also published as: JP2023014710A

Description

この発明は、例えばコンプレッサやモータなどの機器に取り付け可能な防音カバーに関するものである。 This invention relates to a soundproof cover that can be attached to equipment such as compressors and motors.

機械や装置の振動・騒音対策として、防音カバーを取り付けることが提案されている（例えば、特許文献１参照）。特許文献１の防音カバーは、樹脂製のカバー体の縁同士を、クリップで挟んで組み合わせている。 As a measure against vibration and noise from machines and equipment, it has been proposed to attach a soundproof cover (see, for example, Patent Document 1). The soundproof cover in Patent Document 1 is assembled by clamping the edges of a resin cover body with clips.

実用新案登録第３２２６８２０号公報Utility Model Registration No. 3226820

特許文献１の構成であると、クリップが脱落するおそれがあり、カバー体が組み付け難いという問題が指摘される。 It has been pointed out that the configuration of Patent Document 1 has the problem that the clip may fall off, making it difficult to assemble the cover body.

本発明は、従来の技術に係る前記問題に鑑み、これらを好適に解決するべく提案されたものであって、外殻体を組み付け易い防音カバーを提供することを目的とする。 The present invention has been proposed in consideration of the above problems associated with the conventional technology, and aims to provide a soundproof cover that is easy to assemble to the outer shell.

前記課題を克服し、所期の目的を達成するため、本発明に係る防音カバーは、
開閉可能な外殻体から延びるように設けられ、係合孔を有する係合部と、
閉じた前記外殻体における前記係合部に対応する位置に設けられ、前記係合孔への挿脱により前記係合部を着脱可能である係合受部と、を備え、
前記係合受部は、前記外殻体へ向けて斜めに延びるように張り出し、前記係合受部に係合した前記係合部を抜け止めする抜止部を有していることを要旨とする。 In order to overcome the above problems and achieve the intended object, the soundproof cover according to the present invention comprises:
An engagement portion extending from the openable and closable outer shell and having an engagement hole;
an engagement receiving portion provided at a position corresponding to the engagement portion in the closed outer shell body, the engagement portion being detachable by being inserted into and removed from the engagement hole;
The engaging receiving portion protrudes obliquely toward the outer shell body and has a retaining portion that prevents the engaging portion engaged with the engaging receiving portion from coming off.

本発明に係る防音カバーによれば、係合部を係合受部に引っ掛け易いので、外殻体を組み付け易い。 The soundproof cover of the present invention makes it easy to attach the outer shell because the engaging portion can be easily hooked onto the receiving portion.

本発明の実施例に係る防音カバーを閉じた状態で示す斜視図である。1 is a perspective view showing a soundproof cover according to an embodiment of the present invention in a closed state. 実施例の防音カバーを開いた状態で示す斜視図である。FIG. 2 is a perspective view showing the soundproof cover of the embodiment in an open state. 実施例の防音カバーを閉じた状態で示す正面図である。FIG. 2 is a front view showing the soundproof cover of the embodiment in a closed state. 係合部を係合受部に取り付けた状態で示す拡大斜視図である。11 is an enlarged perspective view showing a state in which an engagement portion is attached to an engagement receiving portion; FIG. 図２のＡ－Ａ線で切断した端面図である。FIG. 3 is an end view taken along line AA in FIG. 2. 係合部を係合受部に取り付けた状態で示す要部端面図である。13 is an end view of a main part showing a state in which an engagement portion is attached to an engagement receiving portion. FIG. 係合部を係合受部に取り付ける過程を示す要部端面図である。13A to 13C are end views of essential parts showing a process of attaching an engagement portion to an engagement receiving portion. 係合受部の変更例を示す要部端面図である。13 is an end view of a main portion showing a modified example of the engagement receiving portion. FIG.

次に、本発明に係る防音カバーにつき、好適な実施例を挙げて、添付図面を参照して以下に説明する。本発明の防音カバーは、例えば、コンプレッサやモータやその他の音発生源（取付対象物）に取り付け可能であり、より具体的には、車両に搭載されている車載機器などに用いることができる。 Next, the soundproof cover of the present invention will be described below with reference to the accompanying drawings, showing a preferred embodiment. The soundproof cover of the present invention can be attached to, for example, a compressor, a motor, or other sound generating source (attachment target), and more specifically, can be used for on-board equipment installed in a vehicle.

図１および図２に示すように、実施例の防音カバー１０は、ヒンジ１４で開閉可能な外殻体１２と、外殻体１２の内側に配置された吸音体１６を備えている。防音カバー１０は、外殻体１２を開いて取付対象物に着脱され（図２参照）、外殻体１２を閉じることで、取付対象物を囲うように取り付けられる（図１参照）。 As shown in Figures 1 and 2, the soundproof cover 10 of the embodiment includes an outer shell 12 that can be opened and closed with a hinge 14, and a sound absorbing body 16 arranged inside the outer shell 12. The soundproof cover 10 is attached to and detached from the object to be attached by opening the outer shell 12 (see Figure 2), and is attached to surround the object to be attached by closing the outer shell 12 (see Figure 1).

図１および図３に示すように、外殻体１２は、防音カバー１０の外殻を構成し、音の透過を遮る遮音体としても機能する。外殻体１２は、ヒンジ１４を支点として２つの壁部分２０,２０に分かれて開放可能に構成されている。また、外殻体１２は、２つの壁部分２０,２０の開放端同士を突き合わせて閉じることで、取付対象物を包囲可能な箱状になる。実施例のヒンジ１４は、半円筒形状の壁部分２０と一体的に形成されたインテグラルヒンジである。 As shown in Figures 1 and 3, the outer shell 12 constitutes the outer shell of the soundproof cover 10 and also functions as a sound insulator that blocks the transmission of sound. The outer shell 12 is configured to be able to be opened by separating into two wall portions 20, 20 with the hinge 14 as a fulcrum. In addition, the outer shell 12 becomes box-shaped and can surround an object to be attached by butting the open ends of the two wall portions 20, 20 together and closing them. The hinge 14 in the embodiment is an integral hinge formed integrally with the semi-cylindrical wall portion 20.

図６に示すように、実施例の外殻体１２は、壁部分２０、ヒンジ１４、後述の保持部１８、係合部２２および係合受部２４などの各部が一体成形された高分子化合物の成形品である。外殻体１２を構成する高分子化合物としては、オレフィン系熱可塑性エラストマー（ＴＰＯ）などの熱可塑性エラストマー（ＴＰＥ）を含むエラストマー、または、ポリエチレン（ＰＥ）やポリプロピレン（ＰＰ）などの合成樹脂等を用いることができる。なお、防音カバー１０に干渉するおそれがある周辺部材の保護などの観点において、外殻体１２として、オレフィン系熱可塑性エラストマー（ＴＰＯ）などのエラストマーが柔軟性を有することから好ましい。外殻体１２は、一方の壁部分２０に設けられた係合部２２を、他方の壁部分２０に設けられた係合受部２４に係合して、閉じた状態を保持可能になっている（図１、図４および図６参照）。 As shown in FIG. 6, the shell 12 of the embodiment is a molded product of a polymer compound in which the wall portion 20, the hinge 14, the holding portion 18 described below, the engagement portion 22, and the engagement receiving portion 24 are integrally molded. As the polymer compound constituting the shell 12, an elastomer containing a thermoplastic elastomer (TPE) such as an olefin-based thermoplastic elastomer (TPO), or a synthetic resin such as polyethylene (PE) or polypropylene (PP) can be used. From the viewpoint of protecting surrounding members that may interfere with the soundproof cover 10, an elastomer such as an olefin-based thermoplastic elastomer (TPO) is preferable as the shell 12 because of its flexibility. The shell 12 can be held in a closed state by engaging the engagement portion 22 provided on one wall portion 20 with the engagement receiving portion 24 provided on the other wall portion 20 (see FIG. 1, FIG. 4, and FIG. 6).

吸音体１６は、ポリウレタンフォームやオレフィン系フォームなどの発泡体の成形品である。吸音体１６が、壁部分２０のそれぞれに対応して配置されている。外殻体１２を閉じた際に、２つの吸音体１６,１６で取付対象物を囲うようになっている。吸音体１６は、外殻体１２と別体であり、外殻体１２に対して着脱可能である。実施例の吸音体１６は、外殻体１２に設けられた鉤状の保持部１８によって縁部が保持されている（図５参照）。 The sound absorbing body 16 is a molded product of foam such as polyurethane foam or olefin-based foam. The sound absorbing body 16 is arranged corresponding to each of the wall portions 20. When the outer shell body 12 is closed, the two sound absorbing bodies 16, 16 surround the object to which it is to be attached. The sound absorbing body 16 is separate from the outer shell body 12 and can be attached and detached from the outer shell body 12. The edge of the sound absorbing body 16 in the embodiment is held by a hook-shaped holding portion 18 provided on the outer shell body 12 (see FIG. 5).

図２に示すように、係合部２２は、壁部分２０におけるヒンジ１４が設けられた縁部と異なる縁部に設けられている。係合部２２は、壁部分２０の縁部から延びるように形成された舌片形状である。係合部２２は、基端部（外殻体１２側または根元という場合がある。）が壁部分２０の外面に繋がっており、先端部が壁部分２０の端から延出している。係合部２２の先端部は、外殻体１２を閉じた際に、係合受部２４が設けられた壁部分２０の外面に重なる。なお、実施例の係合部２２は、その厚み方向へ曲げ変形可能な可撓性を有している。係合部２２は、その厚み方向へ貫通するように形成された係合孔２２ａを有している。実施例の係合孔２２ａは、係合部２２の基端部から先端部へ向けて切り欠くように形成されている。 2, the engaging portion 22 is provided on an edge of the wall portion 20 different from the edge where the hinge 14 is provided. The engaging portion 22 is in the shape of a tongue formed to extend from the edge of the wall portion 20. The engaging portion 22 has a base end (sometimes called the shell body 12 side or root) connected to the outer surface of the wall portion 20, and a tip end extending from the end of the wall portion 20. When the shell body 12 is closed, the tip end of the engaging portion 22 overlaps with the outer surface of the wall portion 20 where the engagement receiving portion 24 is provided. Note that the engaging portion 22 of the embodiment has flexibility that allows bending deformation in its thickness direction. The engaging portion 22 has an engaging hole 22a formed to penetrate in its thickness direction. The engaging hole 22a of the embodiment is formed to be cut from the base end of the engaging portion 22 toward the tip end.

図１～図４に示すように、係合受部２４は、外殻体１２を閉じた際に係合部２２に対応する部位に設けられている。係合受部２４は、壁部分２０におけるヒンジ１４が設けられた縁部と異なる縁部に設けられている。係合受部２４は、係合部２２の係合孔２２ａへの挿脱により係合部２２を着脱可能である。図６および図７に示すように、係合受部２４は、係合孔２２ａに通して、係合孔２２ａの開口縁に引っ掛け可能な鉤形状に形成されている。より具体的には、係合受部２４は、壁部分２０の外面から外側へ突出する掛止部２６と、係合受部２４に係合した係合部２２を抜け止めする抜止部２８とを備えている。掛止部２６は、係合部２２を係合受部２４に取り付けた際に、係合孔２２ａの中に配置される部分であり、係合孔２２ａの横幅に合わせた横幅で形成されている。抜止部２８は、係合部２２を係合受部２４に取り付けた際に、係合部２２よりも外側に配置される部分である。抜止部２８は、掛止部２６よりも、係合受部２４が設けられた壁部分２０の開口縁と反対側へ延びている。換言すると、抜止部２８は、掛止部２６よりも係合部２２の基端部と反対側へ延びている。抜止部２８は、係合受部２４が設けられた壁部分２０へ向けて斜めに張り出している。係合部２２を係合受部２４に取り付けた際に、抜止部２８が、係合孔２２ａにおける係合部２２の先端側の開口縁よりも、係合部２２の先端側へ張り出して、係合部２２に重なるように配置される。 1 to 4, the engagement receiving portion 24 is provided at a position corresponding to the engagement portion 22 when the outer shell 12 is closed. The engagement receiving portion 24 is provided at an edge portion of the wall portion 20 different from the edge portion where the hinge 14 is provided. The engagement receiving portion 24 can be attached to and detached from the engagement portion 22 by inserting and detaching the engagement portion 22 into and from the engagement hole 22a of the engagement portion 22. As shown in Figs. 6 and 7, the engagement receiving portion 24 is formed in a hook shape that can be passed through the engagement hole 22a and hooked onto the opening edge of the engagement hole 22a. More specifically, the engagement receiving portion 24 includes a hook portion 26 that protrudes outward from the outer surface of the wall portion 20 and a retaining portion 28 that retains the engagement portion 22 engaged with the engagement receiving portion 24. The hook portion 26 is a portion that is disposed in the engagement hole 22a when the engagement portion 22 is attached to the engagement receiving portion 24, and is formed with a width that matches the width of the engagement hole 22a. The retaining portion 28 is a portion that is disposed outside the engaging portion 22 when the engaging portion 22 is attached to the engaging receiving portion 24. The retaining portion 28 extends further from the hook portion 26 toward the side opposite the opening edge of the wall portion 20 on which the engaging receiving portion 24 is provided. In other words, the retaining portion 28 extends further from the hook portion 26 toward the side opposite the base end of the engaging portion 22. The retaining portion 28 protrudes obliquely toward the wall portion 20 on which the engaging receiving portion 24 is provided. When the engaging portion 22 is attached to the engaging receiving portion 24, the retaining portion 28 protrudes further toward the tip side of the engaging portion 22 than the opening edge on the tip side of the engaging portion 22 in the engagement hole 22a, and is disposed so as to overlap the engaging portion 22.

図４および図６に示すように、抜止部２８は、係合受部２４の根元側に設けられた掛止部２６と間隔をあけて形成された支持部３０に連ねて設けられている。実施例の支持部３０は、掛止部２６から外側へ突出した後に、係合部２２の基端部（係合受部２４が設けられた壁部分２０の開口縁）と反対側へ折れ曲がって壁部分２０と並行するように延びる屈曲形状である。係合受部２４における抜止部２８の根元には、支持部３０によって、係合部２２の基端部（係合受部２４が設けられた壁部分２０の開口縁）と反対側へ開口する凹部２４ａが形成されている。 As shown in Figs. 4 and 6, the retaining portion 28 is connected to the support portion 30 formed at a distance from the hook portion 26 provided on the base side of the engagement receiving portion 24. The support portion 30 in the embodiment has a bent shape that protrudes outward from the hook portion 26, then bends to the opposite side to the base end of the engagement portion 22 (the opening edge of the wall portion 20 where the engagement receiving portion 24 is provided), and extends parallel to the wall portion 20. At the base of the retaining portion 28 in the engagement receiving portion 24, the support portion 30 forms a recess 24a that opens to the opposite side to the base end of the engagement portion 22 (the opening edge of the wall portion 20 where the engagement receiving portion 24 is provided).

図７に示すように、抜止部２８は、係合部２２の係合孔２２ａに通す際に、変位および／または変形するようになっている。抜止部２８の変位および／または変形は、係合受部２４の根元側に設けられた掛止部２６によって規制されるようになっている。また、変位（変形）した抜止部２８の先端が、外殻体１２の壁部分２０と間隔があくように構成されている。このように、抜止部２８は、壁部分２０に向けて変位（変形）しても、壁部分２０に接触しないように設定される。これに対して、抜止部２８は、壁部分２０に向けて変位（変形）した際に、掛止部２６に当たるように設定されている。また、抜止部２８は、掛止部２６に当たった際に、その先端（抜止部２８の突出端）が壁部分２０から係合部２２の板厚以上の間隔があくようにしてもよい。 As shown in FIG. 7, the retaining portion 28 is displaced and/or deformed when it is passed through the engagement hole 22a of the engagement portion 22. The displacement and/or deformation of the retaining portion 28 is restricted by the hook portion 26 provided on the base side of the engagement receiving portion 24. The tip of the displaced (deformed) retaining portion 28 is configured to be spaced from the wall portion 20 of the outer shell body 12. In this way, the retaining portion 28 is configured not to contact the wall portion 20 even if it is displaced (deformed) toward the wall portion 20. In contrast, the retaining portion 28 is configured to hit the hook portion 26 when it is displaced (deformed) toward the wall portion 20. The retaining portion 28 may be configured so that when it hits the hook portion 26, its tip (the protruding end of the retaining portion 28) is spaced from the wall portion 20 by a distance equal to or greater than the plate thickness of the engagement portion 22.

図２に示すように、壁部分２０における係合受部２４の内側に、該壁部分２０の内側に配置される吸音体１６を保持する保持部１８を設けるとよい。 As shown in FIG. 2, a holding portion 18 for holding the sound absorbing body 16 arranged on the inside of the wall portion 20 may be provided on the inside of the engagement receiving portion 24 of the wall portion 20.

防音カバー１０は、係合部２２が外殻体１２に設けられているので、クリップのように組み付け時に落とすおそれがなく、係合部２２を係合受部２４に適切に取り付けることができ、簡単に外殻体１２を閉じ状態に組み付けることができる。そして、車両に搭載されたコンプレッサのような既設の取付対象物であっても、防音カバー１０を簡単に取り付けることができる。また、係合部２２に形成した係合孔２２ａに通して、係合部２２を係合受部２４に引っ掛けるので、係合部２２が係合受部２４に引っ掛かったか否かが判り易く、係合部２２の取り付け不良を回避できる。 Since the engaging portion 22 of the soundproof cover 10 is provided on the outer shell 12, there is no risk of it being dropped during assembly as with clips, and the engaging portion 22 can be properly attached to the engaging receiving portion 24, allowing the outer shell 12 to be easily assembled in a closed state. Furthermore, the soundproof cover 10 can be easily attached even to an existing mounting object such as a compressor mounted on a vehicle. In addition, since the engaging portion 22 is hooked onto the engaging receiving portion 24 through the engaging hole 22a formed in the engaging portion 22, it is easy to tell whether the engaging portion 22 has been hooked onto the engaging receiving portion 24, and poor installation of the engaging portion 22 can be avoided.

係合受部２４の抜止部２８が、外殻体１２の壁部分２０へ向けて斜めに延びるように張り出しているので、係合受部２４の突出端が先細り形状となり（図６参照）、係合受部２４の外側から係合部２２の係合孔２２ａを通し易くすることができる。また、係合部２２の係合孔２２ａに係合受部２４を通すとき、抜止部２８の傾斜形状によって、抜止部２８を壁部分２０へ向けて変位（変形）し易くすることができ、抜止部２８が外側から内側へ向けて変位（変形）することによっても、係合部２２を係合受部２４に取り付け易くなる。一方、係合部２２を係合受部２４に取り付けると、抜止部２８によって係合部２２の外側への変位を阻むことができ、車両走行時の振動等により係合部２２が係合受部２４から意図せず外れることを防止できる。また、抜止部２８の傾斜形状によれば、抜止部２８が内側から外側へ向けて変位（変形）し難くなるので、係合部２２が係合受部２４から外れ難くなる。 Since the retaining portion 28 of the engagement receiving portion 24 protrudes obliquely toward the wall portion 20 of the outer shell 12, the protruding end of the engagement receiving portion 24 has a tapered shape (see FIG. 6), making it easier to pass the engagement hole 22a of the engagement portion 22 from the outside of the engagement receiving portion 24. In addition, when the engagement receiving portion 24 is passed through the engagement hole 22a of the engagement portion 22, the inclined shape of the retaining portion 28 makes it easier to displace (deform) the retaining portion 28 toward the wall portion 20, and the displacement (deformation) of the retaining portion 28 from the outside to the inside also makes it easier to attach the engagement portion 22 to the engagement receiving portion 24. On the other hand, when the engagement portion 22 is attached to the engagement receiving portion 24, the retaining portion 28 can prevent the engagement portion 22 from displacing outward, and can prevent the engagement portion 22 from unintentionally coming off the engagement receiving portion 24 due to vibrations during vehicle travel, etc. In addition, the inclined shape of the retaining portion 28 makes it difficult for the retaining portion 28 to displace (deform) from the inside to the outside, making it difficult for the engaging portion 22 to come off the engaging receiving portion 24.

防音カバー１０は、治具や道具を用いることなく係合部２２を係合受部２４に取り付け可能で、係合部２２を係合受部２４に取り付け易いので、片手であっても取り付け作業を行うことが可能となる。これにより、防音対象物に対する防音カバー１０の取り付け性が向上する。また、例えば車両内の限られたスペースにおいても、防音カバー１０を簡単に取り付けることができ、メンテナンス性を向上できる。 The soundproof cover 10 allows the engagement portion 22 to be attached to the engagement receiving portion 24 without using any jigs or tools, and since the engagement portion 22 is easy to attach to the engagement receiving portion 24, the installation work can be done even with one hand. This improves the ease of attaching the soundproof cover 10 to the object to be soundproofed. Furthermore, the soundproof cover 10 can be easily attached even in a limited space inside a vehicle, for example, improving maintainability.

係合部２２を係合受部２４に取り付ける際に、ある程度変位（変形）した抜止部２８を、係合受部２４の根元側に設けた掛止部２６によって規制することで、係合孔２２ａの開口縁に干渉している抜止部２８の乗り越えを助けることができる。これにより、抜止部２８を係合孔２２ａにより簡単に通すことが可能となる。 When the engaging portion 22 is attached to the engaging receiving portion 24, the retaining portion 28, which has been displaced (deformed) to a certain extent, is restricted by the hook portion 26 provided on the base side of the engaging receiving portion 24, which helps the retaining portion 28 to overcome the interference with the opening edge of the engaging hole 22a. This makes it easier for the retaining portion 28 to pass through the engaging hole 22a.

抜止部２８を、係合受部２４の根元側に設けられた掛止部２６と間隔をあけて形成された支持部３０に連ねて設けることで、掛止部２６との間の凹部２４ａを利用して変形する支持部３０によって、抜止部２８を、より小さい力で、より大きく変位（変形）させることができる。また、係合部２２を係合受部２４に取り付けた後、仮に係合部２２が掛止部２６から外れたとしても、係合部２２が凹部２４ａに入り込むので、係合部２２が係合受部２４から非常に外れ難い。 By providing the retaining portion 28 in connection with the support portion 30 formed at a distance from the hook portion 26 provided on the base side of the engagement receiving portion 24, the retaining portion 28 can be displaced (deformed) to a greater extent with less force by the support portion 30 which deforms by utilizing the recess 24a between the hook portion 26. Furthermore, even if the engaging portion 22 comes off the hook portion 26 after being attached to the engagement receiving portion 24, the engaging portion 22 fits into the recess 24a, making it very difficult for the engaging portion 22 to come off the engagement receiving portion 24.

係合部２２を係合受部２４に取り付ける際に抜止部２８が変位（変形）しても、抜止部２８の先端（抜止部２８の突出端）が外殻体１２の壁部分２０から離れているので、抜止部２８を乗り越えさせて、係合部２２を抜止部２８と壁部分２０との間に、より簡単に配置することができる。 Even if the retaining portion 28 is displaced (deformed) when the engaging portion 22 is attached to the engaging receiving portion 24, the tip of the retaining portion 28 (the protruding end of the retaining portion 28) is separated from the wall portion 20 of the outer shell body 12, so that the engaging portion 22 can be easily positioned between the retaining portion 28 and the wall portion 20 by overriding the retaining portion 28.

係合部２２を引っ張りつつ、係合孔２２ａに係合受部２４を通して、係合受部２４に係合部２２を引っ掛ける。この際、係合受部２４が係合部２２（係合孔２２ａ）以外の部分で押さえられることがある。特に外殻体１２がエラストマーの成形体であると、外殻体１２における係合受部２４の周辺が撓み易く、係合受部２４に係合部２２を引っ掛け難くなる。ここで、保持部１８が係合受部２４の内側に配置されていると、外殻体１２における係合受部２４の周辺が撓み難くなり、係合部２２を係合受部２４に引っ掛け易くなる。これにより、取付対象物に対する防音カバー１０の取り付け作業を行い易くすることができる。 While pulling the engaging portion 22, the engaging receiving portion 24 is passed through the engaging hole 22a and hooked onto the engaging receiving portion 24. At this time, the engaging receiving portion 24 may be held down by a portion other than the engaging portion 22 (engagement hole 22a). In particular, if the outer shell 12 is an elastomer molded body, the periphery of the engaging receiving portion 24 on the outer shell 12 is prone to bending, making it difficult to hook the engaging portion 22 onto the engaging receiving portion 24. Here, if the holding portion 18 is positioned inside the engaging receiving portion 24, the periphery of the engaging receiving portion 24 on the outer shell 12 is less likely to bend, making it easier to hook the engaging portion 22 onto the engaging receiving portion 24. This makes it easier to attach the soundproof cover 10 to the object to which it is to be attached.

（変更例）
前述した事項に限らず、例えば以下のようにしてもよい。なお、本発明は、実施例およ
び以下の変更例の具体的な記載のみに限定されるものではない。
（１）係合受部において、支持部を省略してもよい。図８に示すように、掛止部２６に連ねて、壁部分２０に向けて張り出すように抜止部２８を設けてもよい。
（２）防音カバーは、外側全体を外殻体で構成することに限らず、吸音体の一部が外側に露出していてもよい。
（３）外殻体は、２つに開く構成に限らず、３つ以上の壁部分をヒンジで接続した構成であってもよい。
（４）防音カバーは、吸音体を省略して、外殻体だけで構成してもよい。
（５）係合部自体がゴムのように伸びて、係合孔が広がる構成であってもよい。 (Example of change)
The present invention is not limited to the above, and may be, for example, as follows: It should be noted that the present invention is not limited to the specific descriptions of the examples and the following modified examples.
(1) The support portion may be omitted from the engagement receiving portion. As shown in FIG. 8, a retaining portion 28 may be provided connected to the hook portion 26 so as to protrude toward the wall portion 20.
(2) The soundproof cover does not necessarily have to be configured with an outer shell on the entire outside, and a part of the sound absorbing body may be exposed to the outside.
(3) The outer shell is not limited to a configuration that opens into two parts, but may have a configuration in which three or more wall portions are connected by hinges.
(4) The soundproof cover may be constructed only from the outer shell body, omitting the sound-absorbing body.
(5) The engaging portion itself may stretch like rubber, so that the engaging hole widens.

１０防音カバー，１２外殻体，１６吸音体，１８保持部，２２係合部，
２２ａ係合孔，２４係合受部，２６掛止部，２８抜止部，３０支持部 10 Soundproof cover, 12 Outer shell, 16 Sound absorbing body, 18 Holding portion, 22 Engagement portion,
22a engaging hole, 24 engaging receiving part, 26 latching part, 28 retaining part, 30 supporting part

Claims

An engagement portion extending from the openable and closable outer shell and having an engagement hole;
an engagement receiving portion provided at a position corresponding to the engagement portion in the closed outer shell body, the engagement portion being detachable by being inserted into and removed from the engagement hole;
The soundproof cover is characterized in that the engagement receiving portion protrudes obliquely toward the outer shell body and has a retaining portion that prevents the engagement portion engaged with the engagement receiving portion from coming off.

The retaining portion is displaced when passing through the engagement hole,
2. The soundproof cover according to claim 1, wherein the displacement of the retaining portion is restricted by a hook portion provided on a base side of the engagement receiving portion.

The soundproof cover according to claim 1 or 2, wherein the retaining portion is connected to a support portion formed at a distance from a hook portion provided on the base side of the engagement receiving portion.

The retaining portion is displaced when passing through the engagement hole,
4. The soundproof cover according to claim 1, wherein a tip of the displaced retaining portion is configured to be spaced apart from the outer shell.

The soundproof cover according to any one of claims 1 to 4, wherein a holding portion for holding a sound absorbing body arranged inside the outer shell body is provided on the inside of the engagement receiving portion of the outer shell body.