Silencer mounting structure

Abstract

To provide a silencer capable of attaching to a member to be attached without a subsidiary material even when the member to be attached has a projecting strip part projecting from an attachment surface.SOLUTION: A fitting structure is given in which a silencer 20 is fitted to a panel 10 with a projecting strip part 15. The silencer 20 includes: panel covering parts 23, 24 covering a plate surface of the panel 10; and a first projecting strip covering part 31 and a second projecting strip covering part 36 which rise up from the panel covering parts 23, 24 and turn back to cover the projecting strip part 15. A locking part 32 is arranged at an end part of the first projecting strip covering part 31 and a part 38 to be locked is arranged at an end part of the second projecting strip covering part 36, and the locking part 32 locks the part 38 to be locked to form a bag-shaped portion capable of covering the projecting strip part 15.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a silencer mounting structure. [Background technology]

[0002] Conventionally, sound-insulating mat-shaped silencers have been installed in various locations on vehicles, such as the undercover located under the engine compartment, the underside of the hood, and the dash panel separating the engine compartment from the passenger compartment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-51227 Summary of the Invention [Problem to be solved by the invention]

[0004] The location where such a mat-shaped silencer is to be attached may have a protrusion that protrudes from the attachment surface. Conventionally, when attaching a silencer to such a location, for example, the corresponding portion of the silencer is bent into a U-shape to stand it up, and both ends are fastened with secondary materials such as a stapler to prevent it from opening, forming a bag-like shape, which is then placed over the protrusion. Alternatively, the silencer has been attached using a fastening structure such as clip fastening or stud bolt fastening.

[0005] However, in the above-described configuration in which the raised part of the silencer is secured with auxiliary materials or fastened with fastening members, the number of parts and material costs increase, and parts made of different materials are mixed together, which poses problems in terms of recyclability at the time of disposal.

[0006] The technology disclosed in this specification was developed based on the above circumstances, and aims to provide a silencer that can be attached to a mounting portion without using secondary materials, even if the mounting portion has a protrusion that protrudes from the mounting surface. [Means for solving the problem]

[0007] The technology disclosed in this specification is an attachment structure for attaching a mat-shaped silencer to a panel having protrusions protruding from the panel surface, wherein the silencer has a panel covering portion that covers the panel surface of the panel, and a first protrusion covering portion that rises from the panel covering portion and is folded back to cover one side of the protrusion, and a second protrusion covering portion that covers the other side, wherein at least one end of the first protrusion covering portion in the extension direction is provided with a locking portion extending from the end, and at least one end of the second protrusion covering portion is provided with a locking portion that extends from the end and can lock onto the locking portion, and the first protrusion covering portion and the second protrusion covering portion are connected in a bag-like shape that can cover the protrusion by the locking portion locking onto the locking portion.

[0008] According to the above configuration, even if the panel to which the silencer is attached has protrusions protruding from the panel surface, a bag-like portion that rises from the panel surface can be formed in part of the silencer without using any secondary materials, and this bag-like portion can cover the protrusions. In other words, a silencer made of a single material with excellent recyclability can be provided.

[0009] The engaging portion may have a wide portion whose tip end extends beyond the base end and is widened, and the engaged portion may be narrower than the wide portion and have a hole shape that can engage the wide portion. Such a configuration makes it possible to realize a specific embodiment of the engaging portion and the engaged portion. [Effects of the Invention]

[0010] According to the technology disclosed in this specification, it is possible to provide a silencer that can be attached to a mounting portion without using any secondary materials, even if the mounting portion has a protrusion portion that protrudes from the mounting surface. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a state in which a silencer according to an embodiment is attached to a rear wheel house panel; [Figure 2] Section II of Figure 1 [Figure 3] II-II end view of Figure 1 [Figure 4] Development of the protrusion covering part [Figure 5] Enlarged partial view of Figure 4 [Figure 6] Partially enlarged development view of the protrusion covering portion of the modified example [Figure 7] Partially enlarged development view of the protrusion covering portion of the modified example [Figure 8] Partially enlarged development view of the protrusion covering portion of the modified example DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment in which the technology disclosed in this specification is applied to a silencer 20 that covers a rear wheel house panel 10 for accommodating a rear tire of a vehicle therein will be described with reference to FIGS. 1 to 5.

[0013] The rear wheelhouse panel 10 is formed to accommodate a rear tire inside the panel outside the vehicle and forms part of the body panels that make up the vehicle body. The rear wheelhouse panel 10 is formed by combining at least two panels, and the panels are integrated by overlapping and joining flange portions that rise from a portion of the edge of each panel. Hereinafter, the two panels that make up the rear wheelhouse panel 10 will be referred to as the first panel 11 and the second panel 13, and the portions that rise from a portion of the edge of the first panel 11 and the second panel 13 will be referred to as the first flange portion 12 and the second flange portion 14, respectively. Furthermore, the rib-like portions that rise from the plate surfaces of the first panel 11 and the second panel 13 when the first flange portion 12 and the second flange portion 14 are joined together will be described as protrusion portions 15.

[0014] The protrusions 15 are sized to be grippable by an assembly worker. In this embodiment, the protrusions 15 extend approximately 5 cm from the first panel 11 and the second panel 13, and approximately 15 cm in the extending direction.

[0015] The silencer 20 is a flexible mat-like member having sound insulation properties and made of glass wool, felt, etc. As shown in Fig. 2, the silencer 20 has a two-layer structure consisting of a soft layer 21 that is superimposed along the interior surface of the rear wheel house panel 10, and a hard layer 22 that is laminated on the soft layer 21 and is relatively harder than the soft layer 21.

[0016] As shown in Figure 1, the silencer 20 includes a first covering portion 23 that covers the interior surface of the first panel 11, a second covering portion 24 that covers the interior surface of the second panel 13, and a protrusion covering portion 30 that connects the first covering portion 23 and the second covering portion 24 and covers the protrusion portion 15 of the rear wheelhouse panel 10.

[0017] 4 is a plan view of the protrusion covering portion 30 of the silencer 20 of this embodiment in an unfolded state. The protrusion covering portion 30 has two portions: a first flange covering portion 31 that continues from the first covering portion 23 and covers one side of the protrusion 15 (one side of the first flange portion 12), and a second flange covering portion 36 that continues from the second covering portion 24 and covers the other side of the protrusion 15 (one side of the second flange portion 14). The first flange covering portion 31 and the second flange covering portion 36 have the same dimensions. In addition, the boundary between the first flange covering portion 31 and the second flange covering portion 36 is a folded portion 35 where the first flange covering portion 31 and the second flange covering portion 36 are folded back so that they face each other.

[0018] The first flange covering portion 31 and the second flange covering portion 36 are sized to be slightly larger than the dimensions of the protrusion 15 of the rear wheel house panel 10 as a whole.

[0019] Of these, the first flange covering portion 31 is provided with a pair of locking pieces 32 that protrude in opposite directions from both end portions in the extension direction of the first flange covering portion 31. The pair of locking pieces 32 includes a narrow base end side portion 33 that extends from a center portion in the width direction (rise direction) of the first flange covering portion 31, and a tip end side portion (an example of a wide portion) 34 that extends from a tip end portion in the protruding direction of the base end side portion 33 and protrudes outward in the width direction beyond the base end side portion 33. In this embodiment, the tip end side portion 34 has an isosceles trapezoidal shape, with its lower base continuing with the base end side portion 33 and its upper base, which is shorter than the lower base, being disposed on the tip side.

[0020] Meanwhile, the second flange covering portion 36 is provided with locking pieces 37 that extend from both ends of the second flange covering portion 36 in the extension direction, with the same width as the second flange covering portion 36. Locking holes 38 that penetrate the plate surface are provided in the locking pieces 37 at positions that face the base end portions 33 of the locking pieces 32 when the folded-back portions 35 are folded back. The locking holes 38 are shaped like an isosceles trapezoid, with their lower bases facing inward in the extension direction of the second flange covering portion 36 (the right side in FIG. 4) and their upper bases, which are longer than the lower bases, facing outward (the left side in FIG. 4).

[0021] To explain the locking piece 32 and the locking hole 38 in more detail with reference to Figure 5, let the dimension of the upper base of the locking hole 38 be c, the dimension of the hole edge excluding the upper base (the sum of the lower base and two opposite sides) be a, the dimension of one opposite side be e, the dimension of the lower base of the tip side of the locking piece 32 be b, the height dimension be d, and the plate thickness be f. Then, the dimensions are set so that the following relationship holds: a>b>c and d>e>f ... (Equation 1) By satisfying this relationship, the locking piece 32 can be inserted into the locking hole 38 and can be locked onto the edge of the locking hole 38.

[0022] When assembling such a silencer 20 so that it can be attached to the rear wheelhouse panel 10, first, the folded-back portion 35 is folded back in a mountain fold, and the boundary portion 25 between the first covering portion 23 and the first flange covering portion 31 and the boundary portion 26 between the second covering portion 24 and the second flange covering portion 36 are folded in a valley fold, so that the flange covering portions 31, 36 stand up from the respective covering portions 23, 24. Next, the tip side portion 34 of the locking piece 32 is bent and inserted into the locking hole 38, and after passing through, it is elastically restored to hook onto and lock onto the edge of the locking hole 38. This forms a bag-shaped protrusion covering portion 30 that stands up from the first covering portion 23 and the second covering portion 24 and has both ends closed.

[0023] During such assembly, it is preferable to press-form the protrusion covering portion 30 in advance to prevent the engagement of the locking piece 32 with the locking hole 38 and the bent state of the folded portion 35 and the boundary portions 25, 26 from returning to their original flat state due to the elastic restoring force of the silencer 20.

[0024] 3, the base end side portion 33 of the locking piece 32 is inclined in a direction approaching the locked piece 37 when the folded-back portion 35 is bent, and the portion of the locked piece 37 on the base end side from a position including the locking hole 38 is inclined in a direction approaching the locking piece 32, thereby making it easier to insert the locking piece 32 into the locking hole 38 and maintaining a stable locked state of the locking piece 32 inserted into the locking hole 38. Furthermore, by making the plate thickness of the tip end side of the locking piece 32 thinner so that it is easier to bend, the locking piece 32 can also be made easier to insert into the locking hole 38.

[0025] Next, the effects will be described. The mounting structure of the silencer 20 of this embodiment is a structure in which a mat-shaped silencer 20 is mounted to a rear wheel house panel 10 having protrusions 15 protruding from the plate surface, and the silencer 20 has a first covering portion 23 and a second covering portion 24 that cover the plate surfaces of the first panel 11 and the second panel 13, and a first flange covering portion 31 that rises from the first covering portion 23 and the second covering portion 24 and is folded back to cover one side of the protrusions 15 and cover the other side. The first flange covering portion 31 has a second flange covering portion 36 that covers the protrusion portion 15, and at both ends in the extension direction of the first flange covering portion 31, locking pieces 32 extending from the both ends are provided, and at both ends of the second flange covering portion 36, lockable pieces 37 and locking holes 38 extending from the both ends and capable of locking the locking pieces 32 are provided, and the first flange covering portion 31 and the second flange covering portion 36 are connected in a bag-like shape that can cover the protrusion portion 15 by locking the locking pieces 32 into the locking holes 38.

[0026] According to the above configuration, even if the rear wheel house panel 10 to which the silencer 20 is attached has the protrusions 15 protruding from the plate surface, a bag-shaped portion rising from the plate surface can be formed in part of the silencer 20 without using any secondary materials, and this bag-shaped portion can cover the protrusions 15. In other words, it is possible to provide a silencer 20 that is made of a single material and has excellent recyclability.

[0027] The locking piece 32 has a tip side 34 that extends from the base side 33 and is wider at the tip end, and the locking hole 38 is narrower than the tip side 34 so that the tip side 34 can be locked.

[0028] <Modification> The configuration of the locking pieces and locking holes is not limited to the above embodiment, and various configurations are possible, for example, as shown in Figures 6 to 8. In short, any configuration may be used as long as it satisfies the above-mentioned (Formula 1).

[0029] <Other embodiments> The technology disclosed in this specification is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included in the technical scope.

[0030] (1) In the above embodiment, the silencer 20 is configured to cover the protrusion 15 formed by joining the flange portions 12, 14 of the two panels 11, 13. However, the technology disclosed in this specification can also be applied to a rib-shaped protrusion protruding from the surface of a single panel.

[0031] (2) In the above embodiment, the locking piece 32 having the tip side portion 34 is inserted into the locking hole 38 to be locked, but the configuration of the locking portion and the locked portion is not limited to the above embodiment and can be changed as appropriate. For example, a slit can be provided instead of the locking hole.

[0032] (3) In the above embodiment, both ends of the protrusion covering portion 30 are held open by the locking portion (locking piece 32) and the locked portion (locking hole 38). However, the technical scope also includes a bag-like configuration in which only one end of the protrusion covering portion is held open and the other end is not, with two sides connected. [Explanation of symbols]

[0033] 10: rear wheel house panel (panel), 11: first panel, 12: first flange portion (protrusion portion), 13: second panel, 14: second flange portion (protrusion portion), 15: protrusion portion, 20: silencer, 23: first covering portion (panel covering portion), 24: second covering portion (panel covering portion), 30: protrusion covering portion, 31: first flange covering portion (first protrusion covering portion), 32: locking piece (locking portion), 33: base end side portion, 34: tip side portion (wide portion), 35: folded portion, 36: second flange covering portion (second protrusion covering portion), 37: locked piece, 38: locking hole (locking portion)

Claims

1. An attachment structure for attaching a mat-shaped silencer to a panel having a protrusion portion protruding from a plate surface, the silencer has a panel covering portion that covers a plate surface of the panel, and a first protrusion covering portion that rises from the panel covering portion and is folded back to cover one surface side of the protrusion, and a second protrusion covering portion that covers the other surface side of the protrusion, a locking portion extending from at least one end of the first protrusion covering portion in an extension direction of the first protrusion covering portion; a locking portion extending from at least one end of the second protrusion covering portion and capable of locking the locking portion is provided at the end, A silencer mounting structure in which the first protrusion covering portion and the second protrusion covering portion are connected in a bag-like shape that can cover the protrusion portion by the engaging portion engaging with the engaged portion.

2. 2. The silencer mounting structure according to claim 1, wherein the engaging portion has a wide portion whose tip end extends beyond the base end and is wider, and the engaging portion is narrower than the wide portion and has a hole shape that can engage the wide portion.

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