Soundproof cover

Abstract

To facilitate assembling of an outer shell body.SOLUTION: A soundproof cover 10 includes an outer shell body 12 that can be opened / closed by a hinge 14. The outer shell body 12 has an engagement part 22 provided to extend from the outer shell body 12 and having an engagement hole 22a, and an engagement receiving part 24 provided at a position corresponding to the engagement part 22 in the outer shell body 12 when closed, insertable / removable into / from the engagement hole 22a, and engageable with the engagement part 22 by passing through the engagement hole 22a. The engagement part 22 can be stretched so that the engagement hole 22a extends in the extending direction of the engagement part 22.SELECTED DRAWING: Figure 8

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 assembled by clamping the edges of a resin cover body with clips. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3226820 Summary of the Invention [Problem to be solved by the invention]

[0004] It has been pointed out that with the configuration of Patent Document 1, there is a risk that the clip may fall off, making it difficult to assemble the cover body.

[0005] The present invention has been proposed in view of the above problems associated with the conventional technology, and aims to provide a soundproof cover that is easy to assemble to an outer shell. [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; An engagement portion extending from the outer shell and having an engagement hole; The gist of the invention is that it has an engagement receiving portion that is provided at a position corresponding to the engagement portion on the closed outer shell, is insertable and detachable into the engagement hole, and hooks onto the engagement portion when passed through the engagement hole. Effect of the Invention

[0007] According to the soundproof cover of the present invention, the engaging portion can be easily hooked onto the engaging receiving portion, so that the outer shell can be easily assembled. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a soundproof cover according to an 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 according to an embodiment with an outer shell body in an open state. FIG. [Diagram 3] FIG. 2 is a plan view showing the soundproof cover of the embodiment. [Figure 4] FIG. 2 is a front view showing the soundproof cover of the embodiment. [Diagram 5] FIG. 2 is a side view showing the soundproof cover of the embodiment. [Figure 6] FIG. 2 is a plan view showing the shell of the embodiment in an open state. [Figure 7] FIG. 3 is an end view taken along line AA in FIG. 2. [Figure 8] 5A and 5B are enlarged views showing an engaging portion and an engaging receiving portion of the embodiment, in which (a) shows the engaging portion in a normal state and (b) shows the engaging portion in a pulled state. [Figure 9] 5A and 5B are enlarged cross-sectional views showing an engaging portion and an engaging receiving portion of the embodiment, in which (a) shows the engaging portion in a normal state, and (b) shows the engaging portion in a pulled state. [Figure 10] 11A and 11B are enlarged views showing an engaging portion and an engaging receiving portion of a modified example, in which (a) shows the engaging portion in a normal state and (b) shows the engaging portion in a pulled state. [Figure 11] FIG. 11 is a perspective view showing an engagement portion of a modified example. 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] 1 and 2, the soundproof cover 10 of the 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. 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 Fig. 3 to Fig. 5, the outer shell body 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 body 12 is configured to be able to be opened by being separated into two wall portions 20, 20 with the hinge 14 as a fulcrum. Moreover, the outer shell body 12 becomes a box-like shape that 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 of the embodiment is an integral hinge formed integrally with the semi-cylindrical wall portion 20.

[0012] As shown in Fig. 6, the outer shell 12 of the embodiment is a molded product of a polymer compound in which each part, such as a wall part 20, a hinge 14, a holding part 18 described later, an engagement part 22, and an engagement receiving part 24, are integrally molded. As the polymer compound constituting the outer 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 outer shell 12 because of its flexibility.

[0013] The sound absorbing body 16 is 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. 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 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.

[0014] 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 shell body 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 on which the hinge 14 is provided (see Fig. 6). The engaging portion 22 has a tongue shape formed so as to extend from the edge portion of the wall portion 20. An engaging hole 22a is formed penetrating the engaging portion 22 in the thickness direction. The engaging portion 22 is extendable so that the engaging hole 22a widens in the extending direction of the engaging portion 22 (see Fig. 8). In the description of the engaging portion 22, the extending direction of the engaging portion 22 (extending direction) is sometimes referred to as vertical, and the direction perpendicular to the thickness direction and vertical direction of the engaging portion 22 is sometimes referred to as horizontal.

[0015] As shown in Figs. 3 to 5, 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 is formed in a hook shape that can be passed through the engagement hole 22a and hooked on the opening edge of the engagement hole 22a. More specifically, the engagement receiving portion 24 includes a protruding piece 24a protruding from the outer surface of the wall portion 20 and an extending piece 24b extending from the tip of the protruding piece 24a in parallel to the wall portion 20 (see Figs. 7 and 9). The extending piece 24b extends to the opposite side to the engagement portion 22. The engagement portion 22 is attached to the engagement receiving portion 24 by passing the extending piece 24b from the outside through the engagement hole 22a and fitting the protruding piece 24a into the engagement hole 22a (see Fig. 9(b)). The opening edge of the tip side of the engaging portion 22 in the engaging hole 22a engages with the protruding piece 24a to restrict the opening of the outer shell 12, and the extending piece 24b restricts the engaging portion 22 from slipping out to the outside (see FIG. 9(a)).

[0016] As shown in FIG. 8(a), 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. The shaded portion in FIG. 8(a) is the portion where the engaging portion 22 is connected to 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 on which the engagement receiving portion 24 is provided. The engaging portion 22 of the embodiment has flexibility that allows bending deformation in its thickness direction. The base end side of the engaging portion 22 in the engaging hole 22a is formed so that the width increases from the base end side toward the tip side of the engaging portion 22. The engaging portion 22 has an expanding portion 26a that extends obliquely so that the width of the engaging portion 22 increases in response to the expanding shape of the engaging hole 22a, which expands in width from the base end side toward the tip side of the engaging portion 22. In addition, the tip side of the engagement hole 22a of the engagement part 22 is formed so that the width becomes narrower from the base end side to the tip side of the engagement part 22. The engagement part 22 has a reduced portion 26b that extends obliquely so that the width of the engagement part 22 becomes narrower in response to the reduced shape of the engagement hole 22a, which becomes narrower from the base end side to the tip side of the engagement part 22. In the embodiment, the expanded portion 26a and the reduced portion 26b are formed in a continuous manner. The engagement part 22 of the embodiment has an expandable portion 26 formed in a rhombus like a pantograph by the expanded portion 26a and the reduced portion 26b surrounding the engagement hole 22a. In the embodiment, the engagement part 22 is easily stretched in the vertical direction by the expandable portion 26, and the engagement hole 22a can be expanded in the vertical direction by the expansion of the expandable portion 26 in the vertical direction (see FIG. 8).

[0017] As shown in FIG. 8(a), the width of the engagement hole 22a is larger than the width of the engagement receiving portion 24. The vertical dimension of the engagement hole 22a is smaller than the vertical dimension of the extension piece 24b of the engagement receiving portion 24, and is formed to be approximately the same as the vertical dimension of the protruding piece 24a of the engagement receiving portion 24. The base end side of the engagement portion 22 in the engagement hole 22a has an opening edge that inclines laterally outward as it moves from the base end side to the tip side of the engagement portion 22, and the outer edge of the engagement portion 22 is formed along this opening edge, forming the above-mentioned expanded portion 26a. The tip side of the engagement portion 22 in the engagement hole 22a has an opening edge that inclines laterally inward as it moves from the base end side to the tip side of the engagement portion 22, and the outer edge of the engagement portion 22 is formed along this opening edge, forming the above-mentioned reduced portion 26b. The adjacent expanded portion 26a and reduced portion 26b form a bent shape in which the horizontal portion of the engagement hole 22a in the engagement portion 22 is bent in the horizontal direction. In this embodiment, both lateral portions of the engagement hole 22a in the engagement portion 22 are bent. Also, in this embodiment, the outer edge where the expanding portion 26a and the contracting portion 26b in the engagement portion 22 intersect is angular.

[0018] As shown in FIG. 8, the edge of the tip side of the engaging portion 22 in the engaging hole 22a has an engaging recess 28 formed to match the width of the engaging receiving portion 24. The engaging recess 28 in the embodiment is provided in the horizontal center of the engaging hole 22a. The engaging recess 28 is formed to have a width equal to or slightly larger than the width of the engaging receiving portion 24. The edge of the tip side of the engaging portion 22 in the engaging recess 28 is adapted to be hung on the protruding piece 24a. The vertical dimension of the portion of the engaging hole 22a other than the engaging recess 28 is smaller than the vertical dimension of the protruding piece 24a. This makes it easier to guide the protruding piece 24a into the engaging recess 28 when the engaging portion 22 is attached to the engaging receiving portion 24, and also makes it easier to see that the protruding piece 24a is not fitted into the engaging recess 28. The engaging portion 22 in the embodiment has a symmetrical shape with the engaging recess 28 in between.

[0019] Since the engaging portion 22 of the soundproof cover 10 is provided on the outer shell 12, there is no risk of the engaging portion 22 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. The soundproof cover 10 can be easily attached even to an existing attachment 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 is hooked onto the engaging receiving portion 24, and installation failure of the engaging portion 22 can be avoided.

[0020] As described above, the engaging portion 22 can be stretched so that the engaging hole 22a widens in the extending direction of the engaging portion 22. Therefore, when the outer shell body 12 is closed and the engaging portion 22 is hooked on the engaging receiving portion 24, pulling the tip of the engaging portion 22 stretches the expandable portion 26 in the vertical direction, widening the engaging hole 22a in the vertical direction, and the engaging hole 22a can be made larger than the vertical dimension of the extending piece 24b. This allows the engaging hole 22a to be easily passed through from the outside of the extending piece 24b, and the engaging portion 22 can be easily attached to the engaging receiving portion 24. Then, when the tension on the engaging portion 22 is released, the stretched engaging portion 22 returns to its original state, making it difficult for the engaging portion 22 to come off the engaging receiving portion 24, and the outer shell body 12 can be kept in a closed state. Furthermore, even when removing the engaging portion 22 from the engaging receiving portion 24, pulling the tip of the engaging portion 22 causes the expandable portion 26 to extend vertically, widening the engaging hole 22a vertically, making the engaging hole 22a larger than the vertical dimension of the extending piece 24b. This allows the engaging hole 22a to be easily pulled out from the inside of the extending piece 24b, and the engaging portion 22 to be easily removed from the engaging receiving portion 24. Since the engaging portion 22 can be easily attached to and detached from the engaging receiving portion 24 in this way, the soundproof cover 10 can be properly attached even if the space around the object to be attached is narrow.

[0021] The engaging portion 22 has an expanding portion 26a that extends obliquely so that the width of the engaging portion 22 expands in response to the expanding shape of the engaging hole 22a, which expands in width as it moves from the base end side to the tip end side of the engaging portion 22. As a result, when the engaging portion 22 is pulled from the tip end, the expanding portion 26a deforms, and the vertical dimension of the engaging hole 22a can be expanded. Since the engaging hole 22a is expanded by the shape of the expanding portion 26a in this way, for example, there is no need to use a material that is highly stretchable in the vertical direction as the engaging portion 22, and the degree of freedom in selecting the material of the engaging portion 22 can be improved. In addition, it is possible to prevent the engaging portion 22 itself from remaining stretched in the vertical direction due to pulling from the tip end during installation, and the engaging portion 22 can be installed more reliably by the engagement receiving portion 24.

[0022] The engaging portion 22 has a reduced portion 26b that extends obliquely so that the width of the engaging portion 22 becomes narrower in response to the reduced shape of the engaging hole 22a, which becomes narrower as it moves from the base end side to the tip end side of the engaging portion 22. As a result, when the engaging portion 22 is pulled from the tip end, the reduced portion 26b is deformed, and the vertical dimension of the engaging hole 22a can be expanded. Since the engaging hole 22a is expanded by the shape of the reduced portion 26b in this way, for example, there is no need to use a material that is highly stretchable in the vertical direction as the engaging portion 22, and the degree of freedom in selecting the material of the engaging portion 22 can be improved. In addition, it is possible to prevent the engaging portion 22 itself from remaining stretched in the vertical direction due to pulling during installation, and the engaging portion 22 can be installed more reliably in the engagement receiving portion 24.

[0023] The engaging portion 22 has a bent shape in which both lateral portions of the engaging hole 22a are bent in the horizontal direction, so that when the engaging portion 22 is pulled from the tip, the periphery of the engaging hole 22a is easily deformed, and the vertical dimension of the engaging hole 22a can be expanded. Since the engaging hole 22a is expanded by the shape of the expandable portion 26 in this way, for example, there is no need to use a material that is highly expandable in the vertical direction for the engaging portion 22, and the degree of freedom in selecting the material of the engaging portion 22 can be improved. In addition, the engaging portion 22 itself can be prevented from remaining stretched in the vertical direction due to pulling during installation, and the engaging portion 22 can be installed more reliably in the engagement receiving portion 24.

[0024] 10(a), the maximum width HH of the engagement hole 30a may be made larger than the narrowest width AH of the engagement part 30 closer to the outer shell body 12 than the engagement hole 30a. By doing so, it is possible to make the base side of the engagement part 22 in the engagement hole 30a more easily deformed when the engagement part 30 is pulled from the tip. The other configuration of the engagement part 30 can be the same as that of the engagement part 22 described above.

[0025] As shown in FIG. 10(a) of the engaging portion 30, the maximum width HH of the engaging hole 30a may be formed larger than the narrowest part BH of the engaging portion 30 on the tip side of the engaging portion 30 from the engaging hole 30a. In this way, the tip side of the engaging portion 22 in the engaging hole 30a can be more easily deformed when the engaging portion 30 is pulled from the tip side. In the example of FIG. 10(a), the narrowest part AH of the engaging portion 30 on the shell body 12 side from the engaging hole 30a is the same as the narrowest part BH of the engaging portion 30 on the tip side of the engaging portion 30 from the engaging hole 30a, but they may be different. In addition, the configuration of the engaging portion 22 described above can be applied to the other configurations of the engaging portion 30.

[0026] (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.

[0027] (1) As shown in Fig. 11, the engaging portion 40 may be provided with a deformation portion 42 that bulges out in a convex manner in the thickness direction of the engaging portion 40. In the modified example, a plurality of deformation portions 42 are provided on the side portions of the engaging hole 40a in the engaging portion 40, lined up in the extension direction of the engaging portion 40, so that the side portions of the engaging hole 40a in the engaging portion 40 can be stretched like bellows. Note that the number of deformation portions 42 may be one or three or more, and if there are multiple deformation portions, they may protrude in different directions. Also, the configuration of the deformation portion 42 may be combined with the embodiment or another example.

[0028] (2) 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. (3) 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. (4) The soundproof cover may consist of only the outer shell, omitting the sound-absorbing body. (5) The engaging portion itself may stretch like rubber, widening the engaging hole. [Explanation of symbols]

[0029] 12 outer shell, 14 hinge, 22 engagement portion, 22a engagement hole, 24 engagement receiving portion, 26a expanded part, 26b reduced part, 30 engaging part, 30a engaging hole, 40 engaging part, 40a Engagement hole

Claims

1. An outer shell that can be opened and closed with a hinge; An engagement portion extending from the outer shell and having an engagement hole; an engagement receiving portion that is provided at a position corresponding to the engagement portion in the closed outer shell, the engagement receiving portion being insertable and detachable into the engagement hole and being hooked onto the engagement portion when passed through the engagement hole; The engaging portion has an expanding portion that extends obliquely so that the width of the engaging portion increases in accordance with the expanding shape of the engaging hole, the width of which increases from the base end side to the tip end side of the engaging portion. A soundproof cover characterized by:

2. An outer shell that can be opened and closed with a hinge; An engagement portion extending from the outer shell and having an engagement hole; an engagement receiving portion that is provided at a position corresponding to the engagement portion in the closed outer shell, the engagement receiving portion being insertable and detachable into the engagement hole and being hooked onto the engagement portion when passed through the engagement hole; The engagement portion has a narrowing portion that extends obliquely so that the width of the engagement portion becomes narrower in correspondence with the narrowing shape of the engagement hole, the width of which becomes narrower from the base end side of the engagement portion toward the tip end side of the engagement portion. A soundproof cover characterized by:

3. An outer shell that can be opened and closed with a hinge; An engagement portion extending from the outer shell and having an engagement hole; an engagement receiving portion that is provided at a position corresponding to the engagement portion in the closed outer shell, the engagement receiving portion being insertable and detachable into the engagement hole and being hooked onto the engagement portion when passed through the engagement hole; The engaging portion has a bent shape in which both lateral portions of the engaging hole are bent in the lateral direction. A soundproof cover characterized by:

4. An outer shell that can be opened and closed with a hinge; An engagement portion extending from the outer shell and having an engagement hole; an engagement receiving portion that is provided at a position corresponding to the engagement portion in the closed outer shell, the engagement receiving portion being insertable and detachable into the engagement hole and being hooked onto the engagement portion when passed through the engagement hole; The width of the engagement hole is larger than the narrowest width of the engagement portion on the outer shell body side than the engagement hole. A soundproof cover characterized by:

5. An outer shell that can be opened and closed with a hinge; An engagement portion extending from the outer shell and having an engagement hole; an engagement receiving portion that is provided at a position corresponding to the engagement portion in the closed outer shell, the engagement receiving portion being insertable and detachable into the engagement hole and being hooked onto the engagement portion when passed through the engagement hole; The width of the engagement hole is larger than the narrowest width of the engagement portion located on the tip side of the engagement hole. A soundproof cover characterized by:

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