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 (see, for example, Patent Document 1). The soundproof cover in Patent Document 1 is composed of a resin outer shell and sound-absorbing material placed 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 slippage.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology in order to solve them in an appropriate manner, and aims to provide a soundproof cover that properly holds a sound absorbing body. [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: A 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. [Effects of the Invention]

[0007] According to the soundproof cover of the present invention, the sound absorbing body can be properly held by the holding portion. [Brief explanation 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. [Figure 2] 1 is a perspective view showing a soundproof cover of a first embodiment with an outer shell body opened. [Figure 3] FIG. 1 is a plan view showing a soundproof cover according to a first embodiment. [Figure 4] FIG. 2 is a front view showing the soundproof cover of the first embodiment. [Figure 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. 7. [Figure 9] FIG. 10 is a perspective view showing the shell body of the second embodiment in an open state. [Figure 10] 10A is a plan view showing the shell of the second embodiment in an open state, (b) is an end view taken along line CC of (a), and (c) is an end view taken along line DD of (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 INVENTION

[0009] Next, a 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 object), and more specifically, can be used for on-board equipment installed in a vehicle. [Example]

[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 with a hinge 14, and a sound absorbing body 16 disposed inside the outer shell 12. The outer shell 12 is also provided with a holder 18 that holds the sound absorbing body 16 (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 Figures 1 and 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 sound transmission. The outer shell body 12 is configured to be openable by being separated into two wall portions 20, 20 with a hinge 14 as a fulcrum. Furthermore, the outer shell body 12 becomes box-shaped and can enclose an object to be attached to 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 made of a polymer compound in which each of the components, such as the wall portion 20, hinge 14, retaining portion 18, engaging portion 22, and engaging receiving portion 24, is integrally molded. The polymer compound constituting the shell body 12 can be 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). Note that elastomers such as an olefin-based thermoplastic elastomer (TPO) are preferred for the shell body 12 because of their flexibility, from the viewpoint of protecting surrounding components that may interfere with the soundproof cover 10.

[0013] As shown in Figures 1, 4, and 5, an engaging portion 22 provided on one wall portion 20 can be hooked onto an engaging receiving portion 24 provided on the other wall portion 20 to maintain the closed state of the outer shell body 12. The engaging portion 22 is provided on an edge portion of the wall portion 20 different from the edge portion on which the hinge 14 is provided (see Figure 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 Figure 2). The engaging receiving portion 24 is provided at a position corresponding to the engaging portion 22 when the outer shell body 12 is closed. The engaging receiving portion 24 is provided on an edge portion of the wall portion 20 different from the edge portion on which the hinge 14 is provided. The engaging receiving portion 24 is formed in a hook shape so as to be able to pass through the engaging hole 22a and hook onto the opening edge of the engaging hole 22a.

[0014] The sound absorbers 16 can be molded foams such as polyurethane foam or olefin-based foam. The sound absorbers 16 are arranged corresponding to each wall portion 20. In the first embodiment, when the outer shell body 12 is closed, the two sound absorbers 16 surround the object to be attached. The sound absorbers 16 are separate from the outer shell body 12 and can be attached and detached to the outer shell body 12. The sound absorbers 16 are merely held to the outer shell body 12 by the holding parts 18, and are not joined to the outer shell body 12; for example, the sound absorbers 16 are molded in a mold into which the outer shell body 12 is inserted and then integrated with the outer shell body 12, or are adhered to the outer shell body 12 with an adhesive or the like.

[0015] As shown in FIG. 6, the retaining portion 18 is provided on the edge of the wall portion 20. The retaining 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 retaining portion 18 has an extending piece 18a extending inward from the edge of the wall portion 20 and a retaining piece 18b extending from the extending end of the extending piece 18a so as to face the wall portion 20. The retaining portion 18 is configured to clamp the edge of the sound absorber 16 between the retaining piece 18b and the wall portion 20. In the first embodiment, the tip of the retaining piece 18b is open so as to be away from the inner surface of the wall portion 20, making it easy to manipulate the retaining piece 18b when attaching or detaching the sound absorber 16. The retaining portions 18 are provided at multiple locations 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 corresponding to the inside of the hinge 14 on the edge portion connected to 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 corresponding to the inside of the hinge 14 on the edge portion connected to the hinge 14, or on a position corresponding to 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. In the first embodiment, the accommodating recess 26 is formed by recessing the end face of the sound absorber 16 to correspond to the extending piece 18a and recessing the inner face of the sound absorber 16 to correspond to the retaining piece 18b. When the outer shell 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. This makes it difficult for gaps to form within the sound absorber 16, thereby 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] The soundproof cover 10 of the first embodiment holds the sound absorber 16 to the shell body 12 by the holding parts 18, thereby preventing the sound absorber 16 from shifting position. Furthermore, holding the sound absorber 16 with the holding parts 18 makes it easy to attach the sound absorber 16 to the shell body 12. In particular, holding the edges of the sound absorber 16 with the holding parts 18 makes it possible to hold the sound absorber 16 effectively with a small number of holding parts 18.

[0018] Unlike when 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 hassle of applying adhesive or the risk of application errors. Also, unlike when 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 to the outer shell body 12, so there is no need to select materials to bond them together, 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 absorber 16 can be easily attached to the shell body 12 by clamping the hook-shaped retaining portion 18, which extends inward from the edge of the shell body 12, to the sound absorber 16. The sound absorber 16 can be appropriately positioned by the retaining portion 18, which has 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 pressed by a portion other than the engaging portion 22 (engagement hole 22a). In particular, if the outer shell body 12 is an elastomer molded body, the periphery of the engaging receiving portion 24 on the outer shell body 12 is likely to bend, 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 body 12 is unlikely 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 attached.

[0021] Because the outer shell 12 is a molded elastomer product, it is less likely to have an adverse effect on devices and the like placed around the soundproof cover 10 even if it comes into contact with them. Furthermore, because the sound absorber 16 is a molded foam product, it can achieve favorable sound absorption performance.

[0022] (Second embodiment) A soundproof cover 30 having a holding portion according to another embodiment different from the first embodiment will be described below with reference to Figures 9 to 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 that rises 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 designed to hold the edge of the sound absorber 16. The second retaining portion 34 is a plate-like portion that rises from the inner surface of the wall portion 20. A plurality of second retaining portions 34 are arranged side by side on the outer shell 12, and include second retaining portions 34 with hooks facing in one direction (FIG. 10(b)) and second retaining portions 34 with hooks facing in the opposite direction (FIG. 10(c)). The second holding portion 34 is adapted to be hooked onto a recessed 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 achieves the same effects as the first embodiment. If the first holding portion 32 is disposed inside the engagement receiving portion 24, the effect of suppressing deflection of the wall portion 20 is improved, which is even better. In the second embodiment, the sound absorber 16 can be positioned and held more effectively by the first holding portion 32 and the second holding portion 34. Note that in the first embodiment, the sound absorber 16 can be attached to the shell body 12 more easily.

[0025] (Example of change) The present invention is not limited to the above-mentioned items, and may be, for example, as follows: Note 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 being configured with an outer shell as the entire exterior, 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 a structure in which three or more wall portions are connected by hinges. (3) For the sound absorber, foam such as polyurethane foam is suitable 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. A 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; an engaging portion provided on the outer shell; an engagement receiving portion that is provided on the outer shell and that can hook the engagement portion when the outer shell is closed, The holding portion is disposed inside the engagement receiving portion. A soundproof cover characterized by:

2. The engaging portion is formed in a tongue shape that protrudes from one of the outer shells when the outer shells are opened and has an engaging hole, 2. The soundproof cover according to claim 1, wherein the engagement receiving portion is provided on the other outer shell when the outer shell is opened, and is formed in a hook shape that can be hooked onto an opening edge of the engagement hole.

3. The outer shell is a molded product of an elastomer, 3. The soundproof cover according to claim 1, wherein the sound absorbing body is a molded foam product.

Images