Soundproofing cover and soundproofing cover with sound-absorbing material

Abstract

To allow an engagement part to be hardly detached from an engagement reception part in a sound insulation cover.SOLUTION: A sound insulation cover 10 comprises: a cover body 12 which can be opened / closed; an engagement part 22 provided in the cover body 12; and an engagement reception part 24 which is provided in a position corresponding to the engagement part 22 in the closed cover body 12 and to / from which the engagement part 22 can be attached / detached. The sound insulation cover 10 includes a support part 18 which is provided inside the engagement part 22 in the cover body 12 and can support the closed cover body 12 from the inside.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention relates to a sound insulation cover that can be attached to devices such as motors, for example.

Background Art

[0002] As a countermeasure against vibration and noise of machines and devices, it has been proposed to attach a sound insulation cover (see, for example, Patent Document 1). The sound insulation cover of Patent Document 1 combines the edges of a resin cover body by sandwiching them with clips.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] With the configuration of Patent Document 1, there is a risk that the clip may fall off when the resin cover body is bent.

[0005] In view of the above problems in the prior art, the present invention is proposed to preferably solve these problems, and an object thereof is to provide a sound insulation cover in which the engaging portion is difficult to disengage from the engaging receiving portion.

Means for Solving the Problems

[0006] To overcome the above problems and achieve the intended purpose, the sound insulation cover according to the present invention includes a cover body that can be opened and closed, and an engaging portion provided on the cover body, and an engaging receiving portion provided at a position corresponding to the engaging portion on the closed cover body, and the engaging portion is detachable. The gist of the invention is that the cover body is provided with a support portion located inside the engaging portion, which is capable of supporting the closed cover body from the inside. [Effects of the Invention]

[0007] According to the sound-insulating cover of the present invention, the engaging portion is less likely to come off the engaging receiving portion. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing a sound-insulating cover according to an embodiment of the present invention, where (a) is the cover in a closed state and (b) is the cover in an open state. [Figure 2] This is a front view showing the sound insulation cover of the embodiment. [Figure 3] This is a plan view showing the sound insulation cover of the embodiment. [Figure 4] This is an end view taken along line AA in Figure 2. [Figure 5] This is an enlarged view of the part corresponding to section B in Figure 4, where (a) shows the cover in the open state and (b) shows the cover in the closed state. [Figure 6] This is an enlarged view of the main part of the sound-insulating cover of the embodiment, where (a) shows the cover in the open state and (b) shows the cover in the closed state. [Figure 7] This is an enlarged view of the part corresponding to section B in Figure 4, which shows an example of a modified support section; (a) shows the cover in the open state, and (b) shows the cover in the closed state. [Modes for carrying out the invention]

[0009] Next, a preferred embodiment of the sound-insulating cover according to the present invention will be described below with reference to the attached drawings. The sound-insulating cover of the present invention can be attached to, for example, a motor or other sound source (object to be attached), and more specifically, it can be used for in-vehicle equipment mounted in a vehicle. [Examples]

[0010] As shown in Figures 1 to 4, the sound insulation cover 10 of the embodiment includes a cover body 12 that can be opened and closed by a hinge 14. The sound insulation cover 10 also includes a support portion 18 provided on the cover body 12, an engaging portion 22 provided on the cover body 12, and an engaging receiving portion 24 provided on the cover body 12. The sound insulation cover 10 is attached to and detached from the object to be attached by opening the cover body 12 (see Figure 1(b)), and then attached to surround the object to be attached by closing the cover body 12 (see Figure 1(a)). As shown in Figure 4, the sound insulation cover 10 may also include a sound-absorbing material 16 that is placed on top of the inside of the cover body 12.

[0011] As shown in Figures 1 to 4, the cover body 12 of the embodiment comprises a wall portion 20 that constitutes the outer wall of the sound insulation cover 10 and functions as a sound insulation body that blocks the transmission of sound, and a hinge 14 that connects the wall portions 20. The cover body 12 is configured to be able to be opened by separating into two wall portions 20, 20 with the hinge 14 as a pivot point. Furthermore, the cover body 12 becomes a box shape that can enclose the object to be attached by butting the open ends of the two wall portions 20, 20 together and closing them. The hinge 14 of the embodiment is an integral hinge formed integrally with the semi-cylindrical wall portion 20.

[0012] As shown in Figure 1, the sound insulation cover 10 is a molded product of a polymer compound in which each part, such as the cover body 12, support part 18, engaging part 22, and engaging receiving part 24, is integrally molded. As the polymer compound constituting the sound insulation cover 10, an elastomer containing a thermoplastic elastomer (TPE) such as olefin-based thermoplastic elastomer (TPO), or a synthetic resin such as polyethylene (PE) or polypropylene (PP) can be used. In addition, from the viewpoint of protecting surrounding members that may interfere with the sound insulation cover 10, an elastomer such as olefin-based thermoplastic elastomer (TPO) is preferred as the polymer compound because it has flexibility. The sound insulation cover 10 can be kept in a closed state by engaging the engaging part 22 provided on one wall part 20 with the engaging receiving part 24 provided on the other wall part 20 (see Figures 1(a), 2 and 4).

[0013] The sound-absorbing body 16 can be made of a molded foam, such as polyurethane foam or olefin foam. The sound-absorbing bodies 16 are preferably arranged to correspond to each of the wall sections 20, so that when the cover body 12 is closed, the two sound-absorbing bodies 16, 16 surround the object to be installed. The sound-absorbing bodies 16 may be integrally molded with the cover body 12 and installed overlapping on the inside of the cover body 12. Alternatively, the sound-absorbing bodies 16 may be made separately from the cover body 12 and made detachable from the cover body 12.

[0014] As shown in Figures 1(b) and 3, the engaging portion 22 is provided on an edge of the wall portion 20 that is different from the edge of the wall portion 20 on which the hinge 14 is provided. The engaging portion 22 in this embodiment is tongue-shaped and is formed to extend from the edge of the cover body 12. The base end (sometimes called the cover body 12 side or root) of the engaging portion 22 is connected to the outer surface of the wall portion 20, and the tip extends from the end of the cover body 12. When the cover body 12 is closed, the tip of the engaging portion 22 overlaps with the outer surface of the wall portion 20 on which the engaging receiving portion 24 is provided. The engaging portion 22 in this embodiment is flexible and can be bent in the thickness direction. The engaging portion 22 has an engaging hole 22a formed to penetrate in the thickness direction. The engaging hole 22a in this embodiment is formed to cut out from the base end to the tip of the engaging portion 22.

[0015] As shown in Figures 1 and 2, the engagement receiving portion 24 is provided at the location corresponding to the engagement portion 22 when the cover body 12 is closed. The engagement receiving portion 24 is provided at a different edge of the wall portion 20 from the edge where the hinge 14 is provided. The engagement receiving portion 24 allows the engagement portion 22 to be attached to and detached by inserting and removing it from the engagement hole 22a of the engagement portion 22. As shown in Figures 4 and 5, 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.

[0016] As shown in FIGS. 4 and 5, the sound insulation cover 10 is provided inside the engaging portion 22 in the cover body 12 and includes a support portion 18 that can support the closed cover body 12 from the inside. The support portion 18 of the embodiment is formed in a plate shape that protrudes inward from the inner wall surface of the wall portion 20. Further, the support portion 18 protrudes from the edge of the wall portion 20 where the engaging portion 22 is provided. When the cover body 12 is closed, the protruding portion of the support portion 18 overlaps the inside of the wall portion 20 where the engaging receiving portion 24 is provided (see FIG. 5). The support portion 18 of the embodiment is inclined inward as it protrudes from the edge of the wall portion 20. More specifically, when the cover body 12 is closed, the support surface 18a of the support portion 18 that faces the inner surface of the wall portion 20 where the engaging receiving portion 24 is provided is inclined inward as it protrudes from the edge of the wall portion 20 where the engaging portion 22 is provided.

[0017] As shown in FIGS. 5 and 6, the support portion 18 is disposed at a position overlapping the engaging hole 22a. The support portion 18 is disposed at a position corresponding to the central portion of the engaging portion 22, and in the embodiment, it also corresponds to the central portion of the engaging hole 22a (see FIG. 6(a)). The protruding dimension Y of the support portion 18 from the edge of the wall portion 20 where the engaging portion 22 is provided is shorter than the dimension X of the engaging hole 22a. It is preferable from the viewpoint of the attachment and detachment between the engaging portion 22 and the engaging receiving portion 24 that the protruding dimension Y of the support portion 18 be set to be half or less of the dimension X of the engaging portion 22 in the extending direction in the engaging hole 22a.

[0018] As shown in FIG. 5(a), the support portion 18 has a support surface 18a that overlaps the inside of the closed cover body 12 on the opening edge side of the engaging hole 22a. The support surface 18a of the embodiment is the surface that faces outward in the support portion 18 and is continuous with the open edge of the wall portion 20 where the engaging portion 22 is provided. When the cover body 12 is closed, the open edge of the wall portion 20 where the engaging receiving portion 24 is provided is located between the support surface 18a and the engaging portion 22, and the support surface 18a can receive the inward displacement of this open edge.

[0019] The sound insulation cover 10 is equipped with a support portion 18 on the inside of the engaging portion 22 of the cover body 12, which can support the closed cover body 12 from the inside. Therefore, when the engaging receiving portion 24 or its vicinity is pushed from the outside while the cover body 12 is closed, the support portion 18 supports the cover body 12 from the inside. By limiting the displacement and deformation of the engaging receiving portion 24 with the support portion 18, it is possible to prevent the engaging portion 22 from coming off the engaging receiving portion 24 when force is applied to the cover body 12 from the outside. In addition, when attaching the engaging portion 22 to the engaging receiving portion 24, the support portion 18 prevents the engaging receiving portion 24 from being displaced inward, making it easier to attach the engaging portion 22 to the engaging receiving portion 24. This makes it easier to assemble the sound insulation cover 10 and improves the workability of installation. Furthermore, because the open ends of the cover body 12 are less likely to shift, gaps are less likely to form at the joint between the open ends, improving sound insulation performance.

[0020] By positioning the support portion 18 to overlap with the engagement hole 22a, the support portion 18 effectively prevents the engagement receiving portion 24 from moving inward when the engagement portion 22 is attached to the engagement receiving portion 24. Furthermore, by making the protrusion dimension Y of the support portion 18 from the edge of the cover body 12 shorter than the dimension X of the engagement hole 22a, the support portion 18 is less likely to get in the way when attaching or detaching the engagement portion 22 and the engagement receiving portion 24.

[0021] By forming the support portion 18 so as it protrudes from the edge of the cover body 12, it is possible to make it easier to close the cover body 12. Furthermore, since the support portion 18 has a support surface 18a on the opening edge side of the engagement hole 22a that overlaps with the inside of the closed cover body 12, the open ends fit together at the support surface 18a when the cover body 12 is closed. When the engagement receiving portion 24 or its vicinity is pushed from the outside while the cover body 12 is closed, the cover body 12 is firmly supported by the support surface 18a. This further prevents the engagement portion 22 from coming off the engagement receiving portion 24 when force is applied to the cover body 12 from the outside.

[0022] (Example of change) In addition to the matters described above, the invention may also be applied in the following ways, for example. Furthermore, the present invention is not limited to the specific descriptions of the examples and the following modifications. (1) The sound insulation cover is not limited to being configured to cover the entire outside of the object to be attached with the cover body; for example, a part of the sound-absorbing material placed inside the sound insulation cover may be exposed to the outside. (2) The cover body is not limited to a configuration that opens in two parts, but may also be configured in which three or more wall sections are connected by hinges. (3) As shown in Figure 7, the support surface 18a of the support portion 18 may be formed to extend along the inner surface of the open edge of the wall portion 20 on which the engagement receiving portion 24 is provided. In Figure 5, the support surface 18a extends inclined inward, but in Figure 7, the support surface 18a extends parallel to the inner surface of the open edge of the wall portion 20. In this way, by having a support surface 18a on the opening edge side of the engagement hole 22a of the support portion 18 that overlaps with the inside of the closed cover body 12, the inward displacement and deformation of the cover body 12 can be suppressed by the support surface 18a, making it difficult for the engagement portion 22 to come off the engagement receiving portion 24. [Explanation of Symbols]

[0023] 10 Sound insulation cover, 12 Cover body, 18 Support part, 18a Support surface, 22 Engaging part, 22a Engagement hole, 24 Engagement receiving part

Claims

1. A cover body having two wall sections that can be opened and closed, An engaging portion provided on one of the aforementioned wall portions, In the closed cover body, an engagement receiving portion is provided at a position corresponding to the engagement portion on the other wall portion, and the engagement portion is detachable from the engagement portion, The device includes a support portion provided on the inside of the engaging portion in one of the wall portions, positioned at a distance from the inner surface of the other closed wall portion, and capable of supporting the other wall portion from the inside when it is pushed from the outside. A soundproofing cover characterized by the following features.

2. A cover that can be opened and closed, The engaging portion provided on the cover body, An engagement receiving portion is provided in the closed cover body at a position corresponding to the engagement portion, and the engagement portion is detachable from the engagement portion, The cover body comprises a support portion provided on the inside of the engaging portion, which is capable of supporting the closed cover body from the inside, The support portion is formed in a plate shape that rises inward from the inner wall surface of the cover body and protrudes from the edge of the cover body in a direction along the inner wall surface of the cover body. A soundproofing cover characterized by the following features.

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