Soundproof cover

Abstract

To provide a soundproof cover for holding a sound absorber to an outer shell body.SOLUTION: A soundproof cover 10 includes an outer shell body 12 that can be opened and closed with a hinge 14, and a sound absorber 16 disposed inside the outer shell body 12. The outer shell body 12 includes a holding part 18 for holding the sound absorber 16. The holding part 18 is formed in a hook shape extending inward from an edge of the outer shell body 12. An elastomer molded product can be used for forming the outer shell body 12. Further, a foam molded product can be used for forming the sound absorber 16.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a soundproof cover that can be attached to equipment such as a compressor or a motor. [Background technology]

[0002] As a measure against vibration and noise from machines and devices, it has been proposed to attach a soundproof cover (for example, see Patent Document 1). The soundproof cover in Patent Document 1 is composed of a resin outer shell and a sound absorbing material arranged inside the shell. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-175483 Summary of the Invention [Problem to be solved by the invention]

[0004] In a configuration in which sound-absorbing material is packed between the compressor and the outer shell as in Patent Document 1, the sound-absorbing material is prone to shifting.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology, and aims to provide a soundproof cover in which a sound absorbing body is properly held. [Means for solving the problem]

[0006] In order to overcome the above problems and achieve the intended object, the soundproof cover according to the present invention comprises: An outer shell that can be opened and closed with a hinge; A sound absorbing body disposed inside the outer shell; The sound absorbing body has a holding portion provided on the outer shell and holding the sound absorbing body. Effect of the Invention

[0007] According to the soundproof cover of the present invention, the sound absorbing body can be appropriately held by the holding portion. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a soundproof cover according to a first embodiment of the present invention with an outer shell body in a closed state. [Diagram 2] 1 is a perspective view showing a soundproof cover of a first embodiment with an outer shell body in an open state. [Diagram 3] FIG. 2 is a plan view showing the soundproof cover of the first embodiment. [Figure 4] FIG. 2 is a front view showing the soundproof cover of the first embodiment. [Diagram 5] FIG. 2 is a side view showing the soundproof cover of the first embodiment. [Figure 6] FIG. 2 is a plan view showing the shell body of the first embodiment in an open state. [Figure 7] FIG. 3 is an end view taken along line AA in FIG. 2. [Figure 8] FIG. 8 is an enlarged view of part B in FIG. [Figure 9] FIG. 11 is a perspective view showing an outer shell of a second embodiment in an open state. [Figure 10] 1A is a plan view showing an outer shell according to a second embodiment in an open state, (b) is an end view taken along line CC in (a), and (c) is an end view taken along line DD in (a). [Figure 11] 11 is an end view of the soundproof cover of the second embodiment cut at a position corresponding to the line EE in FIG. [Figure 12] FIG. 12 is an enlarged view of part F in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Next, the soundproof cover according to the present invention will be described below by way of preferred embodiments with reference to the accompanying drawings. The soundproof cover according to 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 mounted on a vehicle. EXAMPLES

[0010] (First embodiment) 1 and 2, the soundproof cover 10 of the first embodiment includes an outer shell 12 that can be opened and closed by a hinge 14, and a sound absorbing body 16 disposed inside the outer shell 12. A holder 18 that holds the sound absorbing body 16 is provided on the outer shell 12 (see Figs. 2 and 6). The soundproof cover 10 is attached to and detached from an object by opening the outer shell 12 (see Fig. 2), and is attached to surround the object by closing the outer shell 12 (see Fig. 1).

[0011] As shown in Fig. 1 and Figs. 3 to 5, the outer shell body 12 constitutes the outer shell of the soundproof cover 10 and functions as a sound insulator that blocks the transmission of sound. The outer shell body 12 is configured to be opened by dividing it into two wall portions 20, 20 with a hinge 14 as a fulcrum. Moreover, the outer shell body 12 becomes a box-like shape that can surround an object to which it is to be attached by butting the open ends of the two wall portions 20, 20 together and closing them. The hinge 14 in the first embodiment is an integral hinge formed integrally with the semi-cylindrical wall portion 20.

[0012] As shown in Fig. 6, the shell body 12 of the first embodiment is a molded product of a polymer compound in which each part, such as the wall part 20, the hinge 14, the holding part 18, the engagement part 22, and the engagement receiving part 24, is integrally molded. As the polymer compound constituting the shell body 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. Note that, from the viewpoint of protecting surrounding members that may interfere with the soundproof cover 10, elastomers such as an olefin-based thermoplastic elastomer (TPO) are preferable as the shell body 12 because of their flexibility.

[0013] As shown in Figs. 1, 4 and 5, the engaging portion 22 provided on one wall portion 20 can be hooked onto the engaging receiving portion 24 provided on the other wall portion 20 to hold the outer shell 12 in a closed state. The engaging portion 22 is provided on an edge portion of the wall portion 20 different from the edge portion where the hinge 14 is provided (see Fig. 6). The engaging portion 22 has a tongue shape formed so as to protrude from the edge portion of the wall portion 20. An engaging hole 22a is formed through the engaging portion 22 (see Fig. 2). The engaging receiving portion 24 is provided at a position corresponding to the engaging portion 22 when the outer shell 12 is closed. The engaging receiving portion 24 is provided on an edge portion of the wall portion 20 different from the edge portion where the hinge 14 is provided. The engaging receiving portion 24 is formed in a hook shape that can be hooked onto the opening edge of the engaging hole 22a through the engaging hole 22a.

[0014] The sound absorbing body 16 may be a molded product of a foam such as polyurethane foam or olefin-based foam. The sound absorbing body 16 is arranged corresponding to each of the wall portions 20. In the first embodiment, when the outer shell body 12 is closed, the two sound absorbing bodies 16, 16 surround the mounting object. The sound absorbing body 16 is separate from the outer shell body 12 and can be attached to and detached from the outer shell body 12. The sound absorbing body 16 is merely held by the outer shell body 12 with the holding portion 18, and is not joined to the outer shell body 12, such as by molding the sound absorbing body 16 in a mold into which the outer shell body 12 is inserted and integrating it with the outer shell body 12, or by adhering it to the outer shell body 12 with an adhesive or the like.

[0015] As shown in FIG. 6, the holding portion 18 is provided on the edge of the wall portion 20. The holding portion 18 is formed in a hook shape extending inward from the edge of the shell body 12 (see FIGS. 7 and 8). More specifically, the holding portion 18 has an extension piece 18a extending inward from the edge of the wall portion 20, and a holding piece 18b extending from the extending end of the extension piece 18a so as to face the wall portion 20. The holding portion 18 is configured to hold the edge of the sound absorber 16 between the holding piece 18b and the wall portion 20. In the first embodiment, the tip of the holding piece 18b is open so as to be away from the inner surface of the wall portion 20, making it easy to operate the holding piece 18b when attaching or detaching the sound absorber 16. The holding portion 18 is provided at a plurality of places on the wall portion 20. For example, in the wall portion 20 having the engaging portion 22, the holding portion 18 is provided at a position on the edge portion connected to the hinge 14 corresponding to the inside of the hinge 14, or on an edge portion different from the hinge 14 (see FIG. 6). Also, in the wall portion 20 having the engagement receiving portion 24, the holding portion 18 is provided at a position on the edge portion connected to the hinge 14 corresponding to the inside of the hinge 14, or on a position on the inside of the engagement receiving portion 24, or on an edge portion different from the hinge 14 (see FIG. 6).

[0016] As shown in Fig. 2, the sound absorber 16 has an accommodating recess 26 capable of accommodating the retaining portion 18. The accommodating recess 26 in the first embodiment is formed by recessing the end face of the sound absorber 16 corresponding to the extending piece 18a and by recessing the inner face of the sound absorber 16 corresponding to the retaining piece 18b. When the outer shell body 12 is closed, the extending piece 18a is accommodated in the accommodating recess 26 and does not protrude from the end of the wall portion 20 or the end face of the sound absorber 16, making it difficult for gaps to occur between the sound absorbers 16 and improving soundproofing performance. Furthermore, by accommodating the retaining portion 18 in the accommodating recess 26, the sound absorber 16 can be positioned relative to the wall portion 20.

[0017] In the soundproof cover 10 of the first embodiment, the sound absorbing body 16 is held to the shell body 12 by the holding parts 18, and therefore the sound absorbing body 16 can be prevented from shifting position. Furthermore, by holding the sound absorbing body 16 with the holding parts 18, the sound absorbing body 16 can be easily attached to the shell body 12. In particular, by holding the edge of the sound absorbing body 16 with the holding parts 18, the sound absorbing body 16 can be effectively held with a small number of holding parts 18.

[0018] Unlike a case where the sound absorbing body 16 is bonded to the outer shell body 12 with an adhesive, the soundproof cover 10 of the first embodiment can easily attach the sound absorbing body 16 to the outer shell body 12 without the trouble of applying adhesive or causing application defects. Also, unlike a case where the sound absorbing body 16 is integrally molded with the outer shell body 12, the soundproof cover 10 of the first embodiment does not bond the sound absorbing body 16 and the outer shell body 12, so there is no need to select materials to be bonded to each other, and the degree of freedom in the materials of the outer shell body 12 and the sound absorbing body 16 can be improved.

[0019] The sound absorbing body 16 can be easily attached to the outer shell body 12 by clamping the hook-shaped retaining portion 18 extending inward from the edge of the outer shell body 12 to the sound absorbing body 16. The sound absorbing body 16 can be appropriately positioned by the retaining portion 18 having such a simple shape.

[0020] In the first embodiment, while pulling the engaging portion 22, the engaging receiving portion 24 is passed through the engaging hole 22a and hooked onto the engaging portion 22. At this time, the engaging receiving portion 24 may be held down by a portion other than the engaging portion 22 (the engaging hole 22a). In particular, when the outer shell body 12 is an elastomer molded body, the periphery of the engaging receiving portion 24 in the outer shell body 12 is easily bent, making it difficult to hook the engaging portion 22 onto the engaging receiving portion 24. Here, when the holding portion 18 is disposed inside the engaging receiving portion 24, the periphery of the engaging receiving portion 24 in the outer shell body 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.

[0021] Since the outer shell 12 is a molded product of an elastomer, it is possible to prevent adverse effects even if the outer shell 12 comes into contact with devices arranged around the soundproof cover 10. Furthermore, since the sound absorber 16 is a molded product of a foam, suitable sound absorbing performance is obtained.

[0022] Second embodiment A soundproof cover 30 having a retaining portion according to another embodiment of the present invention will be described below with reference to Fig. 9 to Fig. 12. The basic configuration of the soundproof cover 30 according to the second embodiment can be the same as that of the first embodiment.

[0023] As shown in FIG. 10(a), the outer shell 12 of the second embodiment has a first retaining portion 32 in the shape of a protrusion and a second retaining portion 34 in the shape of a hook. The first retaining portion 32 is a plate-like portion rising from the inner surface of the wall portion 20. The first retaining portion 32 is inserted into a first recessed receiving portion 36 formed in the sound absorber 16 (see FIGS. 11 and 12). The first retaining portion 32 of the second embodiment is provided near the edge of the wall portion 20 and is adapted to hold the edge of the sound absorber 16. The second retaining portion 34 is a plate-like portion rising from the inner surface of the wall portion 20. A plurality of second retaining portions 34 are provided in a line on the outer shell 12, and include a second retaining portion 34 with a hook facing in one direction (FIG. 10(b)) and a second retaining portion 34 with a hook facing in the opposite direction (FIG. 10(c)). The second holding portion 34 is adapted to be hooked onto a concave second receiving portion 38 formed in the sound absorber 16 (see FIG. 11). The second holding portion 34 of the second embodiment is provided in the center of the wall portion 20 and is adapted to hold the center of the sound absorber 16.

[0024] The second embodiment also provides the same effects as the first embodiment. If the first retaining portion 32 is disposed inside the engagement receiving portion 24, the effect of suppressing the deflection of the wall portion 20 is improved, which is even better. In the second embodiment, the sound absorber 16 can be more effectively positioned and retained by the first retaining portion 32 and the second retaining portion 34. In the first embodiment, the sound absorber 16 can be more easily attached to the shell body 12.

[0025] (Example of change) The present invention is not limited to the above-mentioned items, 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 soundproof cover is not limited to having the entire exterior formed of an outer shell, and a portion of the sound-absorbing body may be exposed to the outside. (2) The outer shell is not limited to a structure that opens into two parts, but may have three or more wall sections connected by hinges. (3) As the sound absorbing material, foam such as polyurethane foam is preferred because of its sound absorbing properties and light weight, but other sound absorbing materials such as glass wool may also be used. (4) The configuration of the holding portion in the first embodiment may be applied as the first holding portion in the second embodiment. (5) In the second embodiment, one of the first holding portion and the second holding portion may be omitted. [Explanation of symbols]

[0026] 12 outer shell, 14 hinge, 16 sound absorbing body, 18 holding portion, 22 engagement portion, 24 Engagement receiving part, 32 First holding part (holding part), 34 Second holding part (holding part)

Claims

1. An outer shell that can be opened and closed with a hinge; A sound absorbing body disposed inside the outer shell; a holding portion provided on the outer shell and holding the sound absorbing body; A soundproof cover characterized by:

2. 2. The soundproof cover according to claim 1, wherein the holding portion is formed in a hook shape extending inward from an edge of the outer shell.

3. An engagement portion provided on the outer shell; an engagement receiving portion that is provided on the outer shell and that is capable of engaging the engagement portion when the outer shell is closed; 3. The soundproof cover according to claim 1, wherein the holding portion is disposed inside the engagement receiving portion.

4. The shell is an elastomer molded article, The soundproof cover according to any one of claims 1 to 3, wherein the sound absorbing body is a molded foam product.

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