JP2011121421A - Sound insulation member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation member adequately filling up space between it and a vehicle body, and having excellent sound insulation effect. <P>SOLUTION: The sound insulation member 20 includes a shielding section 30 which is installed at an end of a cover body 22, and fills up space between the cover body 22 and a frame 14 of the vehicle body 12. The shielding section 30 includes an abutting wall part 32 which is installed consecutively to the end of the cover body 22 through an integral hinge 36, and is bendable and deformable inward and outward with the integral hinge 36 as a fulcrum; and an abutting sound absorbing part 34 which is swellingly formed in a projection shape in the abutting wall part 32, and defines space between it and the abutting wall part 32. In the shielding section 30, the upper edge of the abutting wall part 32 is abutted against the frame 14, and the abutting sound absorbing part 34 is pushed against the frame 14 by bending outward the abutting wall part 32 with the integral hinge 36 as the fulcrum. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a soundproof member disposed around a noise generation source and attached to a vehicle body.

  An engine room of a vehicle such as an automobile is provided with an engine and various auxiliary devices, and these engines and auxiliary devices are so-called noise generating sources that generate noise. For this reason, the vehicle body is provided with a soundproofing member that suppresses sound leakage radiated from a noise source on the lower surface of the hood located above the engine room and below the engine room of the vehicle body (Patent Literature). 1). Of these, the soundproofing member disposed below the engine compartment of the vehicle body is generally referred to as an “engine undercover”, and has the function of suppressing noise and the flow of air that flows into the vehicle body during traveling. It also has a rectifying function.

  As shown in FIGS. 7 to 9, most of the soundproofing member 80 is manufactured by blow molding, and the outer surface is formed by a smooth plate-like wall portion 82 and the inner surface on the engine room 16 side is formed. A plurality of hollow sound-absorbing chambers 84 bulging and formed from the plate-like wall portion 82 are defined. Each of the sound absorbing small chambers 84 is formed in a cubic shape in which the top facing the engine room 16 is a flat surface (see FIG. 8 or FIG. 9). The soundproof member 80 partitions the periphery of the engine room 16 so as to insulate the sound from the noise generation source E such as the engine from leaking outward. Further, the soundproof member 80 absorbs sound by vibrating the top of the sound absorbing chamber 84 with sound waves from the noise generating source E, and is soundproofed by both sound insulation and sound absorption.

  In the vehicle 10, the mounting position of the soundproofing member 80 and the position of the frame 14 of the vehicle body 12 may be shifted depending on the vehicle type, specifications, accuracy of members, or mounting error. Difficult to set up. For this reason, in the vehicle 10, a gap S is provided between the end of the soundproof member 80 and the frame 14, and the positional deviation of the soundproof member 80 is absorbed by this gap. However, since sound leaks from the gap S between the end portion of the soundproof member 80 and the frame 14, an elastic rubber plate piece 86 is attached to the end portion of the soundproof member 80 with fasteners such as rivets and bolts. And the gap S is closed by bringing the plate-like piece 86 into contact with the frame 14 (see FIGS. 7 to 9).

Japanese National Patent Publication No. 10-504406

  As described above, since the plate-shaped piece 86 needs to be separately attached to the soundproof member 80, the number of parts increases and there is a problem that it takes time and effort. Further, since the plate-like piece 86 is configured to maintain the contact relationship with the frame 14 only by its own elasticity, when the elasticity becomes low due to deterioration over time, a gap S is generated between the plate-like piece 86 and the frame 14. There is a risk that. Moreover, although the plate-shaped piece 86 can block the sound by closing the gap S between the soundproof member 80 and the frame 14, it does not have a sound absorbing action and has a low soundproofing effect compared to the part partitioned by the soundproof member 80 having the sound absorbing small chamber 84. There are drawbacks.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the soundproofing member according to the prior art, and can properly close the space between the vehicle body and the soundproofing effect. An object is to provide an excellent soundproofing member.

In order to overcome the above-mentioned problems and achieve the intended purpose, the soundproof member of the invention according to claim 1 of the present application,
In the soundproofing member that is placed around the noise source and attached to the car body,
A cover main body comprising a plate-like main body wall and a main body sound-absorbing portion that is convexly formed on the side of the noise generating source in the main body wall, and that defines a space between the main body wall,
Provided at an end of the main body wall in the cover main body, and having a shielding portion for closing between the cover main body and the vehicle body,
The shielding part is
It is connected to the end of the main body wall via an integral hinge, and is bent and deformed inward and outward from the inner side of the noise source and the outer side away from the noise source with the integral hinge as a fulcrum. Possible abutting walls,
A projecting and bulging shape on the noise generation source side of the contact wall portion, defining a space between the contact wall portion and an elastically deformable contact sound absorbing portion;
The shielding portion bends the abutting wall portion outward with the integral hinge as a fulcrum, and abuts the end edge of the corresponding abutting wall portion protruding from the abutting sound absorbing portion to the vehicle body. The contact sound absorbing portion is pressed against the vehicle body so as to be compressed and deformed.
According to the first aspect of the present invention, the positional deviation between the vehicle body and the soundproof member can be absorbed by the shielding portion that can be bent inward and outward, and the soundproof member can be brought into contact with the vehicle body without a gap. . Moreover, since the shielding part is integrally formed with the cover main body, it does not take time to mount and the number of parts does not increase. And since the abutting sound absorbing part has a sound absorbing action similar to the main body sound absorbing part of the cover body, coupled with the sound insulating action of the abutting wall part that abuts the vehicle body and closes the gap, it is excellent as a whole sound insulating part. Has a soundproofing effect.

According to a second aspect of the present invention, the contact sound absorbing portion is characterized in that a corner edge extending along the vehicle body is in contact with the vehicle body on a top side of the contact sound absorbing portion.
According to the invention which concerns on Claim 2, a contact sound absorption part can be made to contact | abut to a vehicle body equally.

In the invention according to claim 3, the shielding portion abuts the end edge of the abutting wall portion on the vehicle body outside a vertical line from the end portion of the main body wall portion toward the vehicle body, and the abutting portion. The gist is that the sound absorbing portion is configured to contact the vehicle body on the inner side of the vertical line.
According to the third aspect of the invention, the repulsive force of the contact sound absorbing portion that is compressed and deformed by contact with the vehicle body acts so as to press the edge of the contact wall portion toward the vehicle body. The contact state with the contact wall portion can be appropriately maintained.

In order to overcome the above-mentioned problems and achieve the intended purpose, the soundproofing member of the invention according to claim 4 of the present application,
In the soundproofing member that is placed around the noise source and attached to the car body,
A cover main body comprising a plate-like main body wall and a main body sound-absorbing portion that is convexly formed on the side of the noise generating source in the main body wall, and that defines a space between the main body wall,
Provided at an end of the main body wall in the cover main body, and having a shielding portion for closing between the cover main body and the vehicle body,
The shielding part is
It is connected to the end of the main body wall via an integral hinge, and is bent and deformed inward and outward from the inner side of the noise source and the outer side away from the noise source with the integral hinge as a fulcrum. Possible abutting walls,
A projecting and bulging shape on the noise generation source side of the contact wall portion, defining a space between the contact wall portion and an elastically deformable contact sound absorbing portion;
The shielding portion bends the abutting wall portion inward with the integral hinge as a fulcrum, and abuts the end of the corresponding abutting wall portion protruding from the abutting sound absorbing portion to the vehicle body. The contact sound absorbing portion is pressed against the receiving portion projecting on the noise generating source side of the main body wall portion with the hinge interposed therebetween so that the contact portion is compressed and deformed.
According to the fourth aspect of the present invention, the positional deviation between the vehicle body and the soundproof member can be absorbed by the shielding part that can be bent and deformed inward and outward, and the soundproof member can be brought into contact with the vehicle body without a gap. . Moreover, since the shielding part is integrally formed with the cover main body, it does not take time to mount and the number of parts does not increase. And since the abutting sound absorbing part has a sound absorbing action similar to the main body sound absorbing part of the cover body, coupled with the sound insulating action of the abutting wall part that abuts the vehicle body and closes the gap, it is excellent as a whole sound insulating part. Has a soundproofing effect.

The gist of the invention according to claim 5 is that the receiving portion is the main body sound absorbing portion provided on the main body wall portion adjacent to the contact sound absorbing portion.
According to the invention of claim 5, since the main body sound absorbing portion has a space inside and is easily bent, the repulsive force of the main body sound absorbing portion bent under contact with the contact sound absorbing portion, The edge of the abutting wall can be pressed more strongly against the vehicle body.

The gist of the invention according to claim 6 is that the contact sound-absorbing part has an angular edge extending along the receiving part on the top side of the corresponding sound-absorbing part.
According to the invention which concerns on Claim 6, a contact sound absorption part can be made to contact | abut to a receiving part equally.

  According to the soundproofing member according to the present invention, it is possible to properly close the gap between the two by adjusting the positional deviation between the vehicle body and the soundproofing effect.

It is a sectional side view which shows a part of vehicle which attached the soundproof member which concerns on suitable Example 1 of this invention. 1 is a schematic perspective view showing a soundproof member of Example 1 with a part broken away. It is the sectional view on the AA line of FIG. It is a principal part expanded sectional view which shows the state which attached the soundproof member of Example 1 to the vehicle body. It is a longitudinal cross-sectional view which shows a part of soundproof member of Example 2. FIG. It is a principal part expanded sectional view which shows the state which attached the soundproof member of Example 2 to the vehicle body. It is side sectional drawing which shows a part of vehicle which attached the conventional soundproof member. It is a schematic perspective view which shows the conventional soundproof member. It is a longitudinal cross-sectional view which shows the principal part of the conventional soundproof member.

  Next, the soundproof member according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment.

  As shown in FIG. 1, the soundproof member 20 of the first embodiment is attached to the vehicle body 12 of the vehicle 10 and is disposed so as to cover the lower side and the side of the engine room 16 in the vehicle 10. The soundproof member 20 includes a cover body 22 including a lower cover portion 22A extending below the engine room 16 where a noise generation source E such as an engine is disposed, and a side cover portion 22B extending to the side of the engine room 16. And a shield 30 provided at the upper end of the side cover 22B and extending between the side 14 of the vehicle body 12 and the side cover 22B. The soundproof member 20 has a cover body 22 and a shielding part 30 integrally formed, and an inner side where the shielding part 30 is inclined toward the noise generation source E side and an outer side where the cover body 22 is inclined toward the side away from the noise generation source E. It is connected so that it can be bent inward and outward (see FIG. 2 or FIG. 3). The soundproof member 20 is made of a synthetic resin such as polyethylene or polypropylene, and is preferably manufactured by blow molding that can mold the cover body 22 and the shielding portion 30 at a time.

  The cover body 22 has a plate-like body wall portion 24 and a projecting bulge formed on the surface of the body wall portion 24 on the noise generating source E side. A hollow sound absorbing space ( And a main body sound absorbing section 26 that defines a space) (see FIG. 2 or FIG. 3). The cover body 22 has a concave and convex shape in which the inner surface facing the engine room 16 is lined with a plurality of main body sound absorbing portions 26, while the outer surface of the main body wall portion 24 facing outwards is smoothly formed to express the air rectifying function. To get. The cover main body 22 is provided with a deformed portion 28 formed of a so-called integral hinge that extends between the main body sound absorbing portion 26 and the main body sound absorbing portion 26 and thins the main body wall portion 24, and is bent by the deformable portion 28. As a result, the side cover portions 22B and 22B rise on both sides of the lower cover portion 22B (see FIG. 3).

  As shown in FIG. 2 or FIG. 3, the main body sound absorbing portion 26 is formed in a cubic shape composed of a side wall surface 26a rising from the main body wall portion 24 and a diaphragm surface 26b closing the top of the side wall surface 26a. A hollow sound absorbing space is defined by the side wall surface 26 a, the diaphragm surface 26 b and the main body wall portion 24. The cover main body 22 may be in any form, even if the sound absorbing spaces of the adjacent main body sound absorbing portions 26, 26 communicate with each other, or each sound absorbing space is formed independently. The cover main body 22 is formed such that the side wall surface 26 a and the diaphragm surface 26 b of the main body sound absorbing portion 26 are thinner than the main body wall portion 24. In addition, the main body sound-absorbing part 26 is not limited to a cubic shape, and various shapes such as a cylindrical shape, a polygonal column shape, and a truncated polygonal pyramid shape can be selected.

  The shielding portion 30 is connected to the upper end portion of the main body wall portion 24 in the side cover portion 22B via an integral hinge 36, and inward and outward with respect to the main body wall portion 24 using the integral hinge 36 as a fulcrum. A contact wall portion 32 that can be bent and deformed is provided (see FIG. 2 or 3). Further, the shielding portion 30 is formed in a convex shape on the surface of the abutting wall portion 32 on the noise generating source E side, and forms a hollow sound absorbing space between the abutting wall portion 32 and the abutting sound absorbing portion. 34 is provided. The soundproof member 20 is configured such that at least the contact sound absorbing portion 34 is elastic in material or structure, and the contact sound absorbing portion 34 is elastically deformable. Here, the soundproofing member 20 of Example 1 is made of a relatively soft synthetic resin such as polypropylene or polyethylene, so that it has overall elasticity. The contact sound absorbing part 34 of the first embodiment is not only flexible of the material made of synthetic resin, but also thinner than the contact wall part 32 and formed hollow, so that it is more flexible than the contact wall part 32. ing. The integral hinge 36 is formed by making the connecting portion between the main body wall portion 24 and the contact wall portion 32 thinner than the main body wall portion 24, and can be bent and deformed by the flexibility of the synthetic resin material constituting the soundproof member 20. It has become.

  In the shielding portion 30, the upper edge of the contact wall portion 32 (the edge facing the frame 14 to be contacted) protrudes from the upper surface of the contact sound absorbing portion 34 (the surface facing the frame 14 to be contacted). (See FIG. 3). The shielding part 30 is formed between the integral hinge 36 and the upper edge of the abutting wall part 32 rather than the maximum dimension of the gap for adjusting the positional deviation defined between the upper end part of the side cover part 22B and the frame 14. The dimension between them is set to be large. The shielding portion 30 is farthest from the integral hinge 36 at the integral hinge 36 and the contact sound absorbing portion 34 than the maximum dimension of the gap defined between the upper end portion of the side cover portion 22B and the frame 14. The dimension between the parts is set to be large. That is, the shielding portion 30 is not affected by the positional deviation between the upper end portion of the side cover portion 22B and the frame 14, and is most from the integral hinge 36 at the upper end edge of the contact wall portion 32 and the contact sound absorbing portion 34. Two places with a distant part contact | abut to the flame | frame 14 (refer FIG. 4). Here, in the soundproof member 20 of the first embodiment, the upper corner edge at the top of the contact sound absorbing portion 34 is farthest from the integral hinge 36, and this portion is a contact portion to the frame 14.

  In the shielding part 30, the contact wall part 32 is provided so as to extend upward over the entire upper end part of the side cover part 22B (see FIG. 2). In the shielding part 30 of the first embodiment, a plurality of contact sound absorbing parts 34 are arranged in a line in the extending direction of the contact wall part 32. In addition, the shielding part 30 may be provided with one abutting sound absorbing part over the extending width of the abutting wall part or with a width smaller than the extending width, or a plurality of abutting sound absorbing parts may be provided on the abutting wall part. They may be arranged apart from each other in the extending direction, and are appropriately set according to the sound absorbing action, the repulsive force when contacting the frame 14 described later, and the like.

  As shown in FIG. 3, the contact sound absorbing portion 34 is formed in a cubic shape including a side wall surface 34a rising from the contact wall portion 32 and a diaphragm surface 34b closing the top of the side wall surface 34a. A hollow sound absorbing space is defined by the wall surface 34 a, the diaphragm surface 34 b, and the contact wall portion 32. In the shielding part 30, the side wall surface 34 a and the diaphragm surface 34 b of the contact sound absorbing part 34 are formed to be thinner than the contact wall part 32.

  The shielding portion 30 has an abutting wall portion 32 that is bent outward with the integral hinge 36 as a fulcrum so that the upper end edge of the abutting wall portion 32 abuts the lower surface of the frame 14 and the abutting portion is compressed and deformed. Thus, the contact sound absorbing portion 34 is configured to be pressed against the lower surface of the frame 14 (see FIG. 4). In addition, the shielding portion 30 has an upper end edge of the abutting wall portion 32 abutting outside a vertical line from the upper end portion of the side cover portion 22B toward the frame 14, and an abutting sound absorbing portion 34 inside the vertical line. It is comprised so that it may contact | abut. That is, the shielding part 30 is brought into contact with the frame 14 at two locations, the outer part and the inner part, with the upper end part of the side cover part 22B interposed therebetween. The contact sound-absorbing portion 34 has a cubic shape and is parallel to the contact wall portion 32 and has a corner edge extending to the frame 14 side (a corner edge formed by the upper wall surface 34a forming the upper surface and the diaphragm surface 34b). In contact with the frame 14, the corner portions of the contact sound absorbing portion 34 are compressed and deformed. In the shielding portion 30, the upper edge of the abutting wall portion 32 and the corner edge formed by the upper wall surface 34 a and the diaphragm surface 34 b in the abutting sound absorbing portion 34 are parallel or substantially to the lower surface (abutting surface) of the frame 14. It is formed to extend in a parallel relationship. Accordingly, the shielding portion 30 is configured so that the upper end edge of the abutting wall portion 32 and the abutting portion of the abutting sound absorbing portion 34 can abut against the frame 14 evenly.

  The soundproof member 20 of Example 1 is manufactured by blow molding as described above. A cylindrical parison is sandwiched between a first mold having a flat molding surface and a second mold having a concave and convex molding surface, and the parison is inflated in accordance with the concave and convex molding surface of the second mold. Thus, the main body sound absorbing portion 26 is defined on one surface of the main body wall portion 24, and the abutting sound absorbing portion 34 is defined on one surface of the abutting wall portion 32. In addition, the integral hinge 36 and the deformation | transformation part 28 can be thinned easily by providing a protrusion on the molding surface of a 1st type | mold, for example. As described above, according to blow molding, the soundproof member 20 having the hollow main body sound absorbing portion 26 and the contact sound absorbing portion 34 can be easily integrally formed in one molding step. Further, the soundproof member 20 is manufactured by blow molding, so that the corner edge of the contact sound absorbing portion 34 is thinner than the central portion of the side wall surface 34a and the diaphragm surface 34b. It is possible to easily deform the corner edge that becomes the contact portion.

[Operation of Example 1]
Next, the operation of the soundproof member 20 according to the first embodiment will be described. In the soundproof member 20 according to the first embodiment, the shielding portion 30 that contacts the frame 14 and closes the space between the frame 14 and the upper end portion of the side cover portion 22B has the integral hinge 36 as a fulcrum with respect to the side cover portion 22B. Since it can be bent and deformed, the projecting dimension from the upper end portion of the side cover portion 22B can be changed by adjusting the bending angle of the shielding portion 30 (see FIG. 3). That is, the soundproof member 20 can maintain an appropriate contact state with the frame 14 by adjusting the inclination angle of the shielding portion 30 in accordance with the gap between the frame 14 and the upper end portion of the side cover portion 22B. (See Figure 4). As described above, according to the soundproof member 20 of the first embodiment, even if the positional relationship between the frame 14 and the soundproof member 20 changes depending on the vehicle type, specifications, member accuracy, attachment error, and the like, the shielding portion 30 is tilted and displaced. Thus, since the misalignment between the two can be absorbed, there is no gap between the soundproof member 20 and the frame 14, and the engine room 16 can be appropriately soundproofed. In addition, the soundproofing member 20 of the first embodiment does not need to be retrofitted with a member that closes the gap like the plate-like piece 86 described in the conventional example because the shielding portion 30 is integrally formed with the cover body 22. Increases in the number of points and installation work can be avoided.

  The soundproof member 20 is configured to abut the sound absorbing portion 34 of the shielding portion 30 against the frame 14 so as to compressively deform, so that the contact sound absorbing portion 34 elastically deformed so as to be partially collapsed is the original. The upper end edge of the contact sound absorbing portion 34 and the contact wall portion 32 can be brought into strong contact with the frame 14 by the repulsive force to return to the shape. As a result, the soundproof member 20 closes the space between the side cover portion 22B and the frame 14 by the abutting wall portion 32 that is in contact with the frame 14, so that the engine room 16 and the outside are partitioned without any gaps. Sound generated from the noise source E can be blocked. Moreover, the sound-insulating member 20 is also provided on the shielding part 30 that closes the space between the upper end part of the side cover part 22B and the frame 14 so that the contact sound-absorbing part 34 faces the noise generation source E similarly to the cover body 22. Therefore, the sound emitted from the noise generation source E can be absorbed by changing the energy to vibrate the diaphragm surface 34b of the contact sound absorbing portion 34. That is, in the soundproofing member 20, the shielding part 30 has the same sound insulation performance and sound absorption performance as the cover main body 22, and can be soundproofed as a whole without omission.

  The soundproof member 20 is positioned in contact with the frame 14 at two locations where the shielding portion 30 is spaced in the inner and outer directions. Here, the soundproofing member 20 is configured such that both the upper end edge of the abutting wall portion 32 with the integral hinge 36 as a fulcrum and the arc locus of the abutting portion of the abutting sound absorbing portion 34 interfere with the frame 14. For this reason, the soundproofing member 20 has either the upper end edge of the contact wall 32 or the contact part of the contact sound absorbing part 34 abuts the frame 14 even if the shield 30 is displaced inward or outward. 30 can be made difficult to shift from the frame 14. Further, the soundproofing member 20 has a contact surface that is compressed and deformed while the contact sound absorbing portion 34 is in contact with the frame 14 and has a wide contact surface with the frame 14 (see FIG. 4). It is further suppressed that the portion 30 is displaced inward and outward. Therefore, the soundproof member 20 can avoid rattling of the shielding part 30 due to vibrations or the like during vehicle travel.

  The soundproof member 20 is configured to urge the abutting wall portion 32 toward the frame 14 by the repulsive force of the abutting sound absorbing portion 34 that has been compressed and deformed, so that the abutting wall portion 32 is compared with the abutting sound absorbing portion 34. Can be set hard, and deformation due to deterioration of the contact wall 32 itself can be suppressed. In the soundproof member 20, the contact wall portion 32 that covers the entire space between the frame 14 and the side cover portion 22B is difficult to loosen, so that the contact state of the contact wall portion 32 with the frame 14 is maintained for a long period of time. Thus, the sound insulation of the engine room 16 can be more reliably performed over a long period of time. The shielding portion 30 according to the first embodiment abuts the frame 14 with the upper end edge of the abutting wall portion 32 outside the vertical line from the upper end portion of the main body wall portion 24 in the side cover portion 22B toward the frame 14. The contact sound absorption part 34 is made to contact inside the vertical line. In other words, the repulsive force acting on the contact sound absorbing portion 34 works toward the direction away from the frame 14 (downward in the embodiment) with the integral hinge 36 as a fulcrum, and accordingly, the upper edge of the contact wall portion 32. In contrast, a force acts in a direction approaching the frame 14 (upward in the embodiment). As a result, the upper edge of the abutting wall portion 32 is strongly pressed against the frame 14, so that the abutting state of the abutting wall portion 32 against the frame 14 can be appropriately maintained, and sound insulation of the engine room 16 can be further suppressed. Can be implemented reliably.

  The soundproof member 20 according to the first embodiment has a configuration in which the shielding portion 30 is bent outward so that the upper end edge of the abutting wall portion 32 and the abutting sound absorbing portion 34 abut against the frame 14. As in the soundproof member 40 of Example 2 shown, the shielding portion 50 is bent inward so that the upper end edge of the abutting wall portion 52 abuts on the frame 14, while the abutting sound absorbing portion 54 is provided on the cover body 22. The structure which abuts on the receiving part 26 may be sufficient. Here, in the second embodiment, the main body sound absorbing portion 26 provided adjacent to the contact sound absorbing portion 54 with the integral hinge 36 sandwiched between the main body wall portion 24 of the cover main body 22 is used as the receiving portion. Since the basic structure of the cover body 22 and the shielding part 50 is the same as that of the soundproof member 20 of the first embodiment, the soundproof member 40 of the second embodiment is omitted by using the same reference numerals as those of the first embodiment. Only the part will be described below.

  As shown in FIG. 5 or FIG. 6, the shielding portion 50 of the second embodiment is in contact with the upper edge of the contact wall portion 52 (the edge facing the frame 14 to be contacted) as in the first embodiment. It is formed so as to protrude from the upper surface of the sound absorbing portion 54. The shielding part 50 has a dimension between the integral hinge 36 and the abutting wall part 52 rather than the maximum dimension of the gap for adjusting the misalignment defined between the upper end part of the side cover part 22B and the frame 14. Is set to be large. Further, the shielding part 50 is set so that the contact sound absorbing part 54 interferes with the adjacent receiving part 26 across the integral hinge 36 in the tilting displacement range matched to the frame 14 of the contact wall part 52. . In other words, the shielding portion 50 is not affected by the positional deviation between the upper end portion of the side cover portion 22B and the frame 14, and the upper end edge of the abutting wall portion 52 abuts the frame 14 and the top portion of the abutting sound absorbing portion 54. A corner edge on the receiving portion 26 side (lower side) is in contact with the receiving portion 26. A plurality of contact sound absorbing parts 54 are arranged in the extending direction of the frame 14 in the shielding part 50 of the second embodiment.

  In the shielding part 50 of the second embodiment, the contact wall part 52 is bent inward with the integral hinge 36 as a fulcrum, the upper end edge of the contact wall part 52 is brought into contact with the lower surface of the frame 14, and the contact part is The contact sound absorbing portion 54 is configured to be pressed against the upper surface of the receiving portion 26 so as to be compressed and deformed (see FIG. 6). Further, the shielding portion 50 is configured such that the upper end edge of the abutting wall portion 52 abuts on the inner side of the vertical line from the upper end portion of the side cover portion 22B toward the frame 14. Further, in the shielding part 50, the contact part between the contact sound absorbing part 54 and the receiving part 26 is located at the integral hinge 36 rather than the vertical line from the contact part of the contact wall part 52 to the frame 14 toward the receiving part 26. It is set to be located on the side. The contact sound-absorbing part 54 is a rectangular shape that is parallel to the contact wall part 52 in a cubic shape and extends toward the receiving part 26 (an corner edge formed by the lower wall surface 54a that forms the lower surface and the diaphragm surface 54b). ) Abuts on the receiving portion 26, and the corner portion of the corresponding sound absorbing portion 54 is compressed and deformed.

  The shielding portion 50 is formed such that the upper end edge of the abutting wall portion 52 extends in a parallel or substantially parallel relationship with the lower surface (abutting surface) of the frame 14. In the shielding part 50, the corner edge formed by the lower wall surface 54 a and the diaphragm surface 54 b in the contact sound absorbing part 54 extends in a parallel or substantially parallel relationship with the upper surface (contact surface) of the receiving part 26. It is formed as follows. Accordingly, the shielding portion 50 can be configured such that the upper end edge of the abutting wall portion 52 can abut against the frame 14 evenly, and the abutting portion of the abutting sound absorbing portion 54 can abut against the receiving portion 26 evenly. It has become.

[Operation of Example 2]
Next, the operation of the soundproof member 40 according to the second embodiment will be described. In the soundproofing member 40 of the second embodiment, the shielding portion 50 that contacts the frame 14 and closes the space between the frame 14 and the upper end portion of the side cover portion 22B has the integral hinge 36 as a fulcrum with respect to the side cover portion 22B. Since it can be bent and deformed, the projecting dimension from the upper end of the side cover 22B can be changed by adjusting the bending angle of the shield 50. That is, the soundproof member 40 can maintain an appropriate contact state with the frame 14 by adjusting the inclination of the shielding unit 50 according to the gap between the frame 14 and the upper end portion of the side cover 22B. As described above, according to the soundproofing member 40 of the second embodiment, the shielding unit 50 is tilted and displaced even if the positional relationship between the frame 14 and the soundproofing member 40 changes depending on the vehicle type, specifications, member accuracy, attachment error, or the like. Thus, since the misalignment between the two can be absorbed, there is no gap between the soundproof member 40 and the frame 14, and the engine room 16 can be appropriately soundproofed. In addition, the soundproofing member 40 of the second embodiment is not required to be retrofitted with a member that closes the gap like the plate-like piece 86 described in the conventional example because the shielding portion 50 is integrally formed with the cover body 22. An increase in the number of points and installation work can be avoided.

  Since the soundproof member 40 is configured to abut the sound absorbing portion 54 of the shielding portion 50 so as to compressively deform against the receiving portion 26, the sound absorbing member 54 elastically deformed so as to be partially collapsed is the original. The upper end edge of the abutting wall portion 52 can be strongly brought into contact with the frame 14 by the repulsive force to return to the shape. In addition, since the receiving portion is the body sound absorbing portion 26 that is hollow and elastically deformable like the contact sound absorbing portion 54, the rebound of the receiving portion 26 that is bent under contact with the contact sound absorbing portion 54. Since the abutting sound absorbing portion 54 is pushed back by the force, the upper end edge of the abutting wall portion 52 can be more abutted against the frame 14. As a result, the soundproof member 40 closes the space between the side cover 22B and the frame 14 by the abutting wall portion 52 that is in contact with the frame 14, so that the engine room 16 and the outside are partitioned without gaps. Sound generated from the noise source E can be blocked. Moreover, the sound-insulating member 40 is also provided on the shielding part 50 that closes the space between the upper end part of the side cover part 22 </ b> B and the frame 14, with the contact sound-absorbing part 54 facing the noise generation source E, like the cover body 22. Therefore, the sound generated from the noise generation source E can be absorbed by changing the energy to vibrate the diaphragm surface 54b of the contact sound absorbing portion 54. That is, in the soundproofing member 40, the shielding part 50 has the same sound insulation performance and sound absorption performance as the cover main body 22, and can be soundproofed without omission as a whole.

  In the soundproof member 40 of the second embodiment, the shielding part 50 is positioned between the frame 14 and the receiving part 26. Here, in the soundproof member 40, the arc locus of the upper edge of the abutting wall portion 52 with the integral hinge 36 as a fulcrum interferes with the frame 14, and the arc locus of the abutting portion of the abutting sound absorbing portion 54 receives the receiving portion. 26. For this reason, in the soundproof member 40, either the upper end edge of the contact wall portion 52 or the contact portion of the contact sound absorbing portion 54 hits the frame 14 or the receiving portion 26 even when the shielding portion 50 is about to be displaced inward or outward. Therefore, it is difficult for the shielding part 50 to be displaced. Further, since the contact sound absorbing part 54 is compressed and deformed while the contact sound absorbing part 54 is in contact with the receiving part 26 and the contact surface with the receiving part 26 is widened, the shielding part 50 is Shifting inward and outward is further suppressed. Therefore, the soundproofing member 40 can avoid rattling of the shielding part 50 due to vibration or the like during vehicle travel.

  The soundproof member 40 is configured to urge the abutting wall 52 toward the frame 14 by the repulsive force of the abutting sound absorbing part 54 that has been compressed and deformed, so that the abutting wall 52 is compared with the abutting sound absorbing part 54. Can be set hard, and deformation due to deterioration of the contact wall 52 itself can be suppressed. In the soundproof member 40, the contact wall portion 52 that covers the entire space between the frame 14 and the side cover portion 22B is difficult to sag, so the contact state of the contact wall portion 52 with the frame 14 is maintained for a long period of time. Thus, the sound insulation of the engine room 16 can be more reliably performed over a long period of time. The shielding part 50 according to the second embodiment abuts the frame 14 on the inner side of the vertical line from the upper end of the main body wall 24 to the frame 14 at the upper edge of the body wall 24 in the side cover 22B. The contact sound absorbing portion 54 is brought into contact with the receiving portion 26 on the outer side (integral hinge 36 side) from the vertical line from the upper end edge of the wall portion 52 toward the receiving portion 26. That is, the repulsive force acting on the contact sound absorbing portion 54 works toward the direction away from the receiving portion 26 with the integral hinge 36 as a fulcrum (upward in the embodiment), and accordingly, the upper end of the contact wall portion 52. A force is applied toward the edge toward the frame 14 (upward in the embodiment). As a result, the upper edge of the abutting wall portion 52 is strongly pressed against the frame 14, so that the abutting state of the abutting wall portion 52 against the frame 14 can be appropriately maintained, and sound insulation of the engine room 16 can be further suppressed. Can be implemented reliably.

(Example of change)
The present invention is not limited to the above-described embodiment, and can be modified as follows.
(1) In the embodiment, the soundproof member according to the present invention is applied to the engine room. However, the soundproof member may be disposed in another part such as between the passenger compartment and the cargo compartment.
(2) The soundproof member may not be configured to surround the three surfaces of the noise generation source, but may be configured to block one surface or two or more surfaces.
(3) The contact relationship between the contact target in the vehicle body and the shielding portion of the soundproof member is not limited to the configuration in which the shield portion contacts from below the contact target in the vehicle body. Even if it is the structure contacted from the side of the contact object in, the soundproof member which concerns on this invention is employable.
(4) The soundproofing member is preferably manufactured by blow molding that can mold the cover body and the shielding portion at a time, but may be configured by combining halves molded by injection molding or the like.
(5) In the embodiment, the configuration in which one corner edge of the contact sound absorbing portion is in contact with the contact object or the receiving portion in the vehicle body is described. A configuration in which the corner edge of the step is brought into contact with the contact target or receiving portion of the vehicle body can also be adopted. That is, it is possible to make the positional displacement more difficult by bringing a plurality of corner edges of the contact sound absorbing portion into contact with the contact target or receiving portion of the vehicle body.
(6) The shielding portion is formed to bulge so as to define a sound absorbing space between the contact sound absorbing portion and the contact wall portion. You may provide another convex part which does not contact | abut.
(7) The shielding portion may be in any form, even if the sound absorbing spaces of adjacent contact sound absorbing portions communicate with each other, or each sound absorbing space is formed independently. By providing a plurality of contact sound absorbing parts side by side in the shielding part, not only the contact pressure between the vehicle body and the contact sound absorbing part can be increased, but also the sound absorbing effect can be improved.
(8) The contact sound absorbing portion is not limited to a cubic shape, and various shapes such as a cylindrical shape, a polygonal column shape, and a truncated polygonal pyramid shape can be selected.
(9) The contact target of the shielding portion of the embodiment is not limited to the frame, and may be in contact with a panel and other members constituting the vehicle body.
(10) In the second embodiment, the abutting sound absorbing part is configured to abut on the adjacent main body sound absorbing part with the integral hinge interposed therebetween, but the plate shape is erected on the main body wall separately from the main body sound absorbing part. A configuration in which the contact sound absorbing portion is in contact with the receiving portion may be employed.

12 body, 22 cover body, 24 body wall part, 26 body sound absorbing part (receiving part),
30, 50 shielding part, 32, 52 contact wall part, 34, 54 contact sound absorbing part,
36 Integral hinge, E Noise source

Claims (6)

In the soundproofing member that is placed around the noise source and attached to the car body,
A cover main body comprising a plate-like main body wall and a main body sound-absorbing portion that is convexly formed on the side of the noise generating source in the main body wall, and that defines a space between the main body wall,
Provided at an end of the main body wall in the cover main body, and having a shielding portion for closing between the cover main body and the vehicle body,
The shielding part is
It is connected to the end of the main body wall via an integral hinge, and is bent and deformed inward and outward from the inner side of the noise source and the outer side away from the noise source with the integral hinge as a fulcrum. Possible abutting walls,
A projecting and bulging shape on the noise generation source side of the contact wall portion, defining a space between the contact wall portion and an elastically deformable contact sound absorbing portion;
The shielding portion bends the abutting wall portion outward with the integral hinge as a fulcrum, and abuts the end edge of the corresponding abutting wall portion protruding from the abutting sound absorbing portion to the vehicle body. A soundproofing member, wherein the contact sound absorbing part is pressed against the vehicle body so that is compressed and deformed.   2. The soundproofing member according to claim 1, wherein the abutting sound absorbing portion is in contact with the vehicle body at a corner edge extending along the vehicle body on a top side of the corresponding sound absorbing portion.   The shielding portion abuts the edge of the abutting wall portion on the vehicle body outside a vertical line from the end portion of the main body wall portion toward the vehicle body, and the abutting sound absorbing portion is located on the inner side of the vertical line. The soundproofing member according to claim 1, wherein the soundproofing member is configured to be brought into contact with the vehicle body. In the soundproofing member that is placed around the noise source and attached to the car body,
A cover main body comprising a plate-like main body wall and a main body sound-absorbing portion that is convexly formed on the side of the noise generating source in the main body wall, and that defines a space between the main body wall,
Provided at an end of the main body wall in the cover main body, and having a shielding portion for closing between the cover main body and the vehicle body,
The shielding part is
It is connected to the end of the main body wall via an integral hinge, and is bent and deformed inward and outward from the inner side of the noise source and the outer side away from the noise source with the integral hinge as a fulcrum. Possible abutting walls,
A projecting and bulging shape on the noise generation source side of the contact wall portion, defining a space between the contact wall portion and an elastically deformable contact sound absorbing portion;
The shielding portion bends the abutting wall portion inward with the integral hinge as a fulcrum, and abuts the end of the corresponding abutting wall portion protruding from the abutting sound absorbing portion to the vehicle body. A sound-insulating member, wherein a corresponding sound-absorbing part is pressed against a receiving part protruding from a noise generating source side of the main body wall part with a hinge so that a contact part is compressed and deformed.   The soundproofing member according to claim 4, wherein the receiving portion is the main body sound absorbing portion provided adjacent to the abutting sound absorbing portion on the main body wall portion.   The soundproofing member according to claim 4 or 5, wherein the abutting sound absorbing part is in contact with a corner edge extending along the receiving part on a top side of the corresponding sound absorbing part.

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