JP2009160959A - Vehicular undercover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular undercover for advantageously preventing the hang-down of an outer peripheral portion of a cover body mounted with a sound absorbing material, in a mounted state under a vehicle floor. <P>SOLUTION: An engaging hole 44 is provided in the outer peripheral portion 42 of the cover body 12 with which the sound absorbing material 14 is overlapped, corresponding to a through-hole 21 of the sound absorbing material 14. A reinforcing plate part 46 with an engaging portion 58 is hinged thereto for reinforcing the outer peripheral portion 42 in such an overlapped structure that it is bent to be overlapped with the outer peripheral portion 42 of the cover body 12 while holding the sound absorbing material 14 therebetween. By bending the reinforcing plate part 46, the engaging portion 58 is inserted through the through-hole 21 to engage with the engaging hole 44. Thus, the sound absorbing material 14 is mounted on the cover body 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicular under cover, and more particularly to an improved structure of a vehicular under cover arranged to cover the under floor of a vehicle in order to prevent leakage of engine noise and the like to the outside.

  Conventionally, in vehicles such as automobiles, it has been taken as one of noise countermeasures to prevent engine noise and the like from leaking outside by covering the under floor of the vehicle, particularly the lower surface of the engine room, etc. with an under cover. Yes. In recent years, a vehicle undercover in which a sound-absorbing material is attached to the upper surface of a plate-like cover body has been proposed in order to meet the increasingly stringent automotive noise regulations (for example, Patent Document 1). This under cover with a sound absorbing material is generally attached to a mounting portion projecting on the outer peripheral portion of the cover body by being bolted or the like under the floor of the vehicle. A sufficient noise reduction effect can be exhibited based on sound absorption or sound insulation.

  However, such a conventional undercover with a sound absorbing material has the following problems.

  That is, in the conventional undercover with a sound absorbing material, the cover main body is formed of a metal press-molded product having excellent strength or a resin molded product having excellent lightness and moldability. In general, in an undercover having a metal cover main body, a sound absorbing material arranged so as to be superimposed on the cover main body is sandwiched between a clamp fitting that is bolted to the cover main body and the cover main body, and the cover It is attached to the main body (see Patent Document 1 below). Further, in the case of an under cover having a cover body made of a resin molded product, in many cases, the outer peripheral portions of the cover body and the sound absorbing material are mutually connected in a state where the sound absorbing material is superimposed on the cover body. The sound absorbing material is attached to the cover body by inserting the resin clips into the corresponding through holes provided at a plurality of locations and fastening the resin clips.

  Thus, in the conventional undercover with a sound absorbing material, regardless of the material of the cover body, a separate independent special member different from the cover body and the sound absorbing material is used to attach the sound absorbing material to the cover body. The same number of sound absorbing materials as the number of attachments to the cover body is required. Therefore, the number of parts increases, and it is inevitable that the manufacturing cost increases accordingly.

  In particular, in an undercover with a sound absorbing material having a cover body made of a resin molded product, the strength of the cover body is inevitably smaller than that of a metal cover body. Therefore, for example, when the cover body cannot be attached to the vehicle floor under a relatively long portion of the outer periphery due to restrictions on the installation space of the under cover under the vehicle floor, the weight of the cover body Due to the weight of the sound absorbing material, the outer peripheral portion that is not attached to the vehicle may bend and hang down. In such a case, a gap is formed between the outer peripheral portion of the cover body that is curved and hangs down and the under floor of the vehicle, from which engine noise leaks and the noise reduction effect of the under cover is reduced. There was a fear. In addition, the height of the undercover from the ground is lowered in the hanging part, and there is a concern that it may be difficult to stably secure the height from the ground required for the entire undercover. There was also.

Japanese Utility Model Publication No. 63-176748

  Here, the present invention has been made in the background as described above, the first problem to be solved is in a vehicle undercover in which a sound absorbing material is attached to a cover body. An object of the present invention is to provide an improved structure so that the manufacturing cost can be advantageously reduced by reducing the number of parts. Further, in the present invention, in a vehicle under cover in which a sound absorbing material is attached to a cover body made of a resin plate, when a relatively long portion of the outer peripheral portion of the cover body cannot be attached under the floor of the vehicle However, when the cover body is attached to the under floor of the vehicle, the outer peripheral portion that is not attached to the vehicle is advantageously prevented from drooping, and the occurrence of problems due to the drooping of the outer peripheral portion can be prevented. Providing such a new structure is a second solution.

  And in this invention, in order to solve both the 1st solution subject and the 2nd solution subject mentioned above, the place made into the summary is arrange | positioned covering at least one part under the floor of a vehicle body. An undercover having a cover main body made of a resin molded product and a sound absorbing material superimposed on and attached to the cover main body, (a) at least one through-hole provided in the outer peripheral portion of the sound absorbing material And (b) at least one engagement hole provided in the outer peripheral portion of the cover main body corresponding to the through hole, and (c) positioned so as to extend along the outer peripheral portion of the cover main body. In the state, a reinforcing plate portion that is integrally hinged to the outer peripheral portion and is bent so as to overlap the outer peripheral portion of the cover main body, thereby reinforcing the outer peripheral portion of the cover main body as a superposed structure; d) the complement An engaging portion that is integrally projected on the surface of the reinforcing plate portion that faces the cover main body by bending the plate portion, is inserted into the through hole, and is engaged with the engaging hole. And the reinforcing plate portion is opposed to the outer peripheral portion of the cover body with the outer peripheral portion of the sound absorbing material interposed therebetween by bending the reinforcing plate portion, and the engagement of the reinforcing plate portion The sound absorbing material is attached to the cover main body when the joint portion is inserted through the through hole and engaged with the engagement hole.

  According to one of the preferred embodiments of the vehicle undercover according to the present invention, an engaging claw that protrudes or extends to the side is integrally formed with the protruding tip side portion of the engaging portion. The engaging claw is engaged with the opening peripheral edge of the engaging hole in the outer peripheral portion of the cover body under the state that the engaging portion is formed and inserted through the through hole and the engaging hole. By being swaged, the engagement of the engagement portion with the engagement hole is realized.

  Further, according to one of the advantageous aspects of the vehicle undercover according to the present invention, the reinforcing plate portion is positioned so as to protrude laterally from the outer peripheral portion of the cover main body and extend along the outer peripheral portion. In this state, it has an L-shaped cross section integrally including a horizontal plate portion hinged to the outer peripheral portion and a vertical plate portion that rises from the protruding tip of the horizontal plate portion and extends the entire length of the horizontal plate portion. Composed.

  Furthermore, according to another desirable aspect of the vehicle undercover according to the present invention, the reinforcing plate portion is positioned so as to extend along the entire outer periphery of the cover main body. , Hinged to the outer periphery.

  Furthermore, according to another preferred aspect of the vehicle undercover according to the present invention, the connecting portion between the outer peripheral portion of the cover main body and the reinforcing plate portion extends along the extending direction of the reinforcing plate portion. A concave groove extending in the entire length of the cover body and the connecting portion is thinned over the entire length thereof, so that the reinforcing plate portion is connected to the outer peripheral portion of the cover body at the thin connecting portion. A hinge portion is formed so as to be foldable so as to be overlapped with each other, and the reinforcing plate portion is hingedly connected to the outer peripheral portion of the cover body.

  According to another advantageous aspect of the vehicle undercover according to the present invention, the reinforcement is provided on the outer peripheral portion of the cover body including the reinforcing plate portion hinged to the outer peripheral portion of the cover main body. A through hole is provided in which the engaging portion of the plate portion has a non-undercut shape.

  In the present invention, in order to solve the first problem to be solved, the cover main body arranged to cover at least a part of the under floor of the vehicle body and the cover main body are overlapped and attached. An under cover having a sound absorbing material, wherein at least one engagement hole is provided in an outer peripheral portion of the sound absorbing material, and at least one engagement with the cover main body engageable with the engagement hole. The sound absorbing material is attached to the cover main body by integrally providing a joint portion corresponding to the through-hole, and engaging the engaging portion with the engaging hole. The feature of the vehicle undercover is also the gist thereof.

  That is, in the vehicle undercover according to the present invention having means for solving both the first and second problems to be solved, the reinforcement is hinged to the outer peripheral edge of the cover body. When the plate portion is bent, the engaging portion integrally projecting from the reinforcing plate portion is inserted into the through hole of the sound absorbing material and is engaged with the engaging hole of the cover main body. Is attached to the cover body. Therefore, unlike a conventional product in which the sound absorbing material is attached to the cover body using a plurality of resin clips etc. that are separate from the sound absorbing material or the cover body, Separate and independent special members that are different from the cover main body and the sound absorbing material are unnecessary, and thus the number of parts can be advantageously reduced.

  Further, in the vehicle undercover according to the present invention, the engaging portion inserted into the through hole of the sound absorbing material by bending the reinforcing plate portion hinged to the outer peripheral portion of the cover main body is the engagement hole of the cover main body. When the sound absorbing material is attached to the cover main body, the outer peripheral portion of the cover main body is overlapped with the reinforcing plate portion to be reinforced. Thereby, the bending strength of the outer peripheral part of the cover main body made into the overlapping structure with the reinforcing plate part can be advantageously increased.

  Therefore, in such an undercover for a vehicle according to the present invention, at the time of mounting the vehicle under the floor, the outer peripheral portion that cannot be mounted under the floor of the vehicle by bolting or the like is reinforced due to installation space restrictions or the like. If the sound absorbing material is attached to the cover body at the engaging part integrally connected to the reinforcing plate part, the plate part is hinged, the cover body that cannot be attached to the under floor of the vehicle. An increase in the strength of the outer peripheral portion can be advantageously achieved. Thus, even when a relatively long outer peripheral portion of the cover main body is not attached to the under floor of the vehicle, the outer peripheral portion of such a cover main body is covered with the cover under the mounting state of the cover main body under the vehicle floor. It can be effectively prevented that the main body is bent due to the weight of the main body or the weight of the sound absorbing material and hangs down.

  Therefore, in the vehicle under cover according to the present invention as described above, the manufacturing cost can be advantageously reduced by reducing the number of parts. In addition, in addition to being able to effectively prevent the cover body from being attached to the under floor of the vehicle with a part of the outer periphery hanging down, a sufficient noise reduction effect can be reliably exhibited, The height from the ground required for the entire undercover can be secured stably.

  And, in the vehicle undercover according to the present invention having means for solving the first problem to be solved, the engaging portion integrally projecting from the cover body overlaps the cover body. The sound absorbing material is attached to the cover main body by being engaged with the engagement hole of the sound absorbing material. Therefore, unlike a conventional product in which the sound absorbing material is attached to the cover body using a plurality of resin clips etc. that are separate from the sound absorbing material or the cover body, A separate and independent special member different from the cover main body and the sound absorbing material becomes unnecessary.

  Therefore, in the vehicle undercover according to the present invention as described above, the number of parts can be advantageously reduced, and thereby the manufacturing cost of the entire undercover can be effectively reduced.

  Hereinafter, in order to clarify the present invention more specifically, the configuration of a vehicle undercover according to the present invention will be described in detail with reference to the drawings.

  First, in FIG. 1 and FIG. 2, as an example of a vehicle under cover having a structure according to the present invention, an automobile under cover that is installed to cover the lower surface of an engine room of a vehicle body of a vehicle has a perspective view and a longitudinal section. Each of the forms is schematically shown. As is clear from these drawings, the under cover 10 of the present embodiment as a whole has a cover body 12 having a substantially L shape, and a sound absorbing material 14 that is superimposed on and attached to the cover body 12. And is configured. In the following, for convenience, the arrangement side of the cover body 12 in the under cover 10 is referred to as the lower side, and the arrangement side of the sound absorbing material 14 is referred to as the upper side.

  More specifically, as is clear from FIGS. 2 and 3, the sound absorbing material 14 includes a plate-like first sound absorbing pad 16 having an L shape substantially corresponding to the cover body 12, and the first sound absorbing pad 16. A plurality of rib-like protrusions 19 extending vertically and horizontally are integrally formed on one surface of a thin L-shaped plate that is slightly smaller than the second sound-absorbing pad 18. Then, the first sound absorbing pad 16 and the second sound absorbing pad 18 are overlapped and joined to each other such that the plurality of rib-shaped protrusions 19 of the second sound absorbing pad 18 protrude from the lower surface of the first sound absorbing pad 16. Thus, the sound absorbing material 14 is formed.

  Further, in such a sound absorbing material 14, the first sound absorbing pad 16 has a shape that is slightly larger than the second sound absorbing pad 18, so that the outer peripheral portion of the first sound absorbing pad 16 is the sound absorbing material 14. The outer flange portion 20 protrudes laterally at the upper end portion and extends continuously in the circumferential direction. Further, the outer flange portion 20 is provided with through holes 21 penetrating through the outer flange portion 20 in a thickness direction at a plurality of locations separated from each other by a predetermined distance.

  The first sound absorbing pad 16 and the second sound absorbing pad 18 are conventionally known materials having sound absorbing properties, for example, inorganic fibers such as glass wool and rock wool, metal fibers such as aluminum fibers, polystyrenes, polyethylenes, urethanes. It is composed of different materials formed in the form of a nonwoven fabric, foam, porous body, etc. using a series resin material, rubber material or the like.

  On the other hand, the cover body 12 is made of a resin molded product formed using, for example, a polyamide resin. And in this cover main body 12, as FIG. 2 which shows the state in which the sound-absorbing material 14 was attached to FIG. 2, and FIG. It has a letter-like housing shape, and is substantially the same as the height of the second sound-absorbing pad 18 of the sound-absorbing material 14 on the relatively thin, substantially L-shaped bottom plate portion 22 and the outer peripheral portion of the bottom plate portion 22. It integrally has a bottom plate portion 22 and a side plate portion 24 having substantially the same thickness and projecting upward at a height and continuously extending in the circumferential direction.

  Further, the side plate portion 24 of the cover main body 12 having such an L shape includes a first bent side plate portion 26 that is bent and extended substantially at a right angle outside the L shape, and a first bent side plate inside the L shape. The first bent side plate portion 26 and the second bent portion are respectively bent at the second bent side plate portion 28 and bent at a substantially right angle while being opposed to the portion 26, and at both ends in the length direction of the side plate portion 24. It consists of connecting side plate portions 30 and 30 that connect the side plate portion 28 to each other.

  And the outer side attachment part 32 which has an outer flange form in the lower end part (end part by the side of the baseplate part 22) of each outer surface of the 1st bending side board part 26 of this side board part 24 and the two connection side board parts 30 and 30 is provided. A plurality are integrally formed at intervals in the length direction of the side plate portion 24. Each of the plurality of outer attachment portions 32 is provided with one bolt hole 34 through which a bolt for attaching the cover body 12 to the lower surface of the engine room (not shown) is inserted.

  Furthermore, a plurality of inner mounting portions 36 having an inner flange shape or a lip shape are provided in the longitudinal direction at the upper end portion (opening side opposite to the bottom plate portion 22) of the inner surface of the first bent side plate portion 26. Are integrally formed at intervals. The plurality of inner attachment portions 36 have engagement holes 40 that are superimposed on the bottom plate portion 22 of the cover main body 12 and into which the resin clips 38 for attaching the arranged sound absorbing material 14 to the cover main body 12 are inserted. , One each. As is apparent from FIG. 2, the resin clip 38 has a disk-shaped head 39 having a larger diameter than the engagement hole 40 and a leg portion that exhibits a resin spring characteristic that extends integrally from the head. It is set as the well-known structure which has the engagement nail | claw part 41 provided in the front-end | tip.

  On the other hand, as apparent from FIGS. 2 and 4, the second bent side plate portion 28 of the side plate portion 24 is not provided with any outer and inner attachment portions 32, 36. Instead, the upper end portions (bottom plate portions 22) of the second bent side plate portions 28 are located on both sides sandwiching the bent portions and extend linearly in two directions orthogonal to each other. A flat plate-like outer flange portion 42 that protrudes outward and continuously extends in the length direction is integrally provided on the end portion on the opening side opposite to that of the opening portion. That is, the cover body 12 is attached to the lower surface of the engine room only at the outer peripheral portion where the first bent side plate portion 26 and the two connecting side plate portions 30 and 30 are formed. For each of the two straight portions of the second bent side plate portion 28 formed on the outer peripheral portion that is not attached to the lower surface of the engine room, the outer flange portion 42 is from the outer peripheral portion that is not attached to the lower surface of the engine room. It is integrally formed so as to protrude outward and to extend along the outer peripheral portion.

  Further, the outer flange portion 42 provided so as to protrude outward with respect to each of the two linear portions of the second bent side plate portion 28 penetrates the base portion side opposite to the protruding tip side. Engagement holes 44 are respectively formed at regular intervals in the length direction of each straight line portion of the second bent side plate portion 28. Note that a plurality of engagement holes 44 provided in each of the two outer flange portions 42, 42 are arranged so that the sound absorbing material 14 is overlaid on the bottom plate portion 22 of the cover body 12. The sound absorbing material 14 is provided at a position corresponding to the plurality of through holes 21 provided in the outer flange portion 20 extending to the inner portion of the L shape of the first sound absorbing pad 16 having the L shape.

  Further, as shown in FIGS. 4 to 6, reinforcing plate portions 46 are hingedly connected to the two outer flange portions 42 of the second bent side plate portion 28, respectively. Each of the reinforcing plate portions 46 is formed of an elongated rectangular flat plate having substantially the same thickness as the side plate portion 24 of the cover main body 12 and the same length as each outer flange portion 42 in the longitudinal direction at the intermediate portion in the width direction. It is made of a plate material having an L-shaped cross section such that it has a bent portion that extends continuously in an L-shape. The reinforcing plate portion 46 is connected to each outer flange portion 42 of the second bent side plate portion 28 via the hinge portion 48 over the entire length on one end side in the width direction.

  That is, the two reinforcing plate portions 46, 46 both project in the same direction as the projecting direction of the outer flange portions 42 from the projecting tip portions of the two outer flange portions 42 of the second bent side plate portion 28. A horizontal plate portion 50 connected to a protruding tip portion of each outer flange portion 42 via a hinge portion 48 in a state of being positioned so as to continuously extend in the length direction, and the horizontal plate portion 50. A vertical plate portion 52 that rises at a substantially right angle from the front end portion in the protruding direction from each outer flange portion 42 and extends the entire length of the horizontal plate portion 50 is integrally formed.

  In other words, in each of the two reinforcing plate portions 46, 46, the cover body 12 is bent without the outer attachment portion 32 for attaching the cover body 12 to the lower surface of the engine room. For each of the two straight portions (two straight portions of the second bent side plate portion 28) of the outer peripheral portion extending in the direction, that is, the outer peripheral portion that is not attached to the lower surface of the engine room, It is connected via a hinge portion 48 in a state where it protrudes laterally from the outer peripheral portion and is positioned so as to continuously extend substantially along the entire outer peripheral portion. And from the edge part on the opposite side to the connection side to each outer peripheral part of such a horizontal board part 50, the vertical board part 52 is substantially orthogonal toward the opposite side to the baseplate part 22 side of the cover main body 12. FIG. In the standing state, it is integrally formed over the entire length of the lateral wall portion 50.

  Further, here, the width of the lateral plate portion 50 of the reinforcing plate portion 46 is substantially the same as the thickness dimension of the outer flange portion 20 in the first sound absorbing pad 16 of the sound absorbing material 14 or a predetermined dimension. It has been made smaller. Further, the width (height) of the vertical wall portion 52 is larger than the distance from the engagement hole 44 to the protruding tip in the outer flange portion 42 protruding from the second bent side plate portion 28 of the cover body 12. (See FIG. 2).

  Furthermore, in the present embodiment, the lower surface (surface on the bottom plate portion 22 side) of the cover body 12 portion located between the outer flange portion 42 of the second bent side plate portion 28 and the lateral plate portion 50 of the reinforcing plate portion 46. In addition, the concave groove 54 having a rectangular shape in the longitudinal section extends continuously along the extending direction of the outer flange portion 42 and the horizontal plate portion 50 along the entire length of each of the outer flange portion 42 and the horizontal plate portion 50. Is formed. Thus, the cover main body 12 portion located between the outer flange portion 42 and the horizontal plate portion 50 is a thin hinge portion 48 having a predetermined width, which is formed by the bottom portion of the concave groove 54. The hinge portion 48 integrally connects the outer flange portion 42 of the second bent side plate portion 28 and the lateral plate portion 50 of the reinforcing plate portion 46.

  Thus, here, the vertical plate portion 52 of the reinforcing plate portion 46 is laid on the outer flange portion 42 side of the second bent side plate portion 28 and overlapped with the upper surface of the outer flange portion 42. Can be bent as a bent portion. Then, the reinforcing plate portion 46 is bent under the state in which the sound absorbing material 14 is placed on the bottom plate portion 22 of the cover main body 12, whereby the vertical plate portion 52 of the reinforcing plate portion 46 becomes the sound absorbing material 14. The first sound absorbing pad 16 is opposed to the upper surface of the outer flange portion 42 of the second bent side plate portion 28 with the outer flange portion 20 interposed therebetween (see FIG. 2).

  Further, the upper end side of the inner side surface 56 of the vertical plate portion 52 that is opposed to the upper surface of the outer flange portion 42 of the second bent side plate portion 28 by bending with the hinge portion 48 of the reinforcing plate portion 46 as a bent portion. The plurality of engaging portions 58 are integrally protruded with a certain distance from each other in the longitudinal direction of the vertical wall portion 52.

  As is apparent from FIGS. 5 and 6, each of the engaging portions 58 protrudes sideways toward the second bent side plate portion 28 side of the cover body 12 with respect to the inner side surface 56 of the vertical plate portion 52. It has the protrusion part 60 integrally formed in the state. The projecting portion 60 is formed of a thin flat plate-like piece, and is opposed to the outer flange portion 42 of the second bent side plate portion 28 on one surface.

  Further, an engaging claw 62 that protrudes sideward (downward) toward the outer flange portion 42 side is integrally formed at a protruding tip side portion of the surface of the protruding portion 60 facing the outer flange portion 42. . The engaging claw 62 has a right-angled triangular cross-sectional shape, and the surface that provides the oblique side of the right-angled triangular cross-section is an inclined surface that extends downward from the tip of the protrusion 60 toward the base side. On the other hand, the surface that is the guide surface 64 and connects the surface facing the outer flange portion 42 of the projecting portion 60 and the guide surface 64 to provide a bottom portion having a right-angled triangular section is the inner side surface of the vertical plate portion 52. The flat engagement surface 66 extends parallel to the reference numeral 56. In addition, a reinforcing rib 68 for preventing the protrusion 60 from being bent or deformed is integrally formed on the surface of the protrusion 60 opposite to the side on which the engagement claw 62 is formed.

  And here, the distance from the edge part by the side of the horizontal board part 50 side to the engaging part 58 in the width direction (the height direction used as the up-down direction of FIG. 6) of the vertical board part 52, and the 2nd bending side board part 28 of FIG. The distance from the hinge portion 48 to the engagement hole 44 in the outer flange portion 42 is substantially the same size. Further, the height dimension from the inner side surface 56 of the vertical plate portion 52 to the engaging surface 66 of the engaging claw 62 is determined by the thickness of the outer flange portion 20 of the first sound absorbing pad 16 and the second bent side plate portion 28 in the sound absorbing material 14. The total dimension of the outer flange portion 42 is substantially the same as or smaller than the total dimension by a predetermined dimension.

  Accordingly, when the reinforcing plate portion 46 is bent with the hinge portion 48 as a bent portion so that the vertical plate portion 52 is superimposed on the upper surface of the outer flange portion 42 of the second bent side plate portion 28, the engaging portion 58. Is inserted into the engagement hole 44 of the outer flange portion 42, and the engagement surface 66 is engaged with the opening peripheral edge portion of the engagement hole 44 on the lower surface of the outer flange portion 42. The bent state of the portion 46 can be maintained. In addition, the outer peripheral portion of the cover body 12 that is not attached to the lower surface of the engine room is connected to the outer flange portion 42 of the second bent side plate portion 28, and the vertical plate portion 52 of the bent reinforcing plate portion 46 is a predetermined portion. A double structure or a superposed structure that is opposed or overlapped with a gap therebetween is reinforced.

  Further, in the cover main body 12 including the reinforcing plate portion 46 having such an engaging portion 58 and the second bent side plate portion 28 having the outer flange portion 42, the reinforcing plate portion 46 is engaged with the vertical plate portion 52. A through hole 70 is provided to extend over a portion located on the lower side of the portion 58, a lateral plate portion 50 portion connected to the lower portion, and an outer flange portion 42 portion of the second bent side plate portion 28. ing. The width of the through hole 70 is larger than the width of the protrusion 60 of the engaging portion 58 by a predetermined size, and the length of the portion extending across the lateral plate portion 50 and the outer flange portion 42 is the same as that of the through hole 70. The projection height of the protrusion 60 is set to a predetermined dimension.

  Thus, here, when the cover body 12 is molded using the split mold, the projection portion for forming the engaging portion 58 in one split mold of the mold used is in the through hole 70. It has come to rush. Thus, the engaging portion 58 has a non-undercut shape that does not cause an undercut with respect to the drawing direction of the split mold when the mold is opened. Manufacturing of the entire undercover 10 is easy.

  Thus, as shown in FIG. 1 and FIG. 2, in the under cover 10 of the present embodiment, the sound absorbing material 14 is disposed on the second sound absorbing pad 18 with respect to the cover body 12 having the above structure. The plurality of protrusions 19 are overlapped and arranged so that the tips of the protrusions 19 are in contact with the upper surface of the bottom plate portion 22 of the cover body 12. Further, under such an arrangement, the outer flange portion 20 of the first sound absorbing pad 16 has the upper surface of each inner mounting portion 36 provided on the first bent side plate portion 26 and the two connecting side plate portions 30, 30 of the cover body 12. And a plurality of through holes 21 provided in the outer flange portion 20 of the first sound absorbing pad 16 are overlapped with the upper surface of the outer flange portion 42 provided in the second bent side plate portion 28, respectively. Corresponding positions respectively correspond to the engagement holes 40 of the inner mounting portions 36 of the one bent side plate portion 26 and the two connecting side plate portions 30 and 30 and the engagement holes 44 of the outer flange portion 42 of the second bent side plate portion 28. I'm hurt.

  In such a state, the resin clip 38 is inserted from the through hole 21 of the first sound absorbing pad 16 positioned corresponding to the engagement hole 40 of each inner mounting portion 36, and is engaged with the through holes 21. An engagement claw portion 41 provided at the tip of the resin clip 38 is inserted through the joint hole 40 and is engaged with the opening peripheral edge portion of the engagement hole 40 in the inner attachment portion 36.

  Further, on the other hand, the reinforcing plate portion 46 hinged to the outer flange portion 42 of the second bent side plate portion 28 of the cover body 12 is bent so that the hinge portion 48 is a bent portion (see FIG. 5). The vertical plate portion 52 of the reinforcing plate portion 46 is positioned outside the second bent side plate portion 28 with the outer flange portion 20 of the first sound absorbing pad 16 interposed therebetween. While facing or overlapping with the flange portion 42, substantially the entire outer flange portion 20 of the first sound absorbing pad 16 is formed by the outer flange portion 42 of the second bent side plate portion 28 and the vertical plate portion 52 of the reinforcing plate portion 46. In addition, the horizontal plate portion 50 is covered from the outside. In such a state, the outer flange portion of the first sound absorbing pad 16 in which the plurality of engaging portions 58 projecting from the vertical plate portion 52 are superimposed on the outer flange portion 42 of the second bent side plate portion 28. 20 through holes 21 and the corresponding engagement holes 44 of the outer flange portion 42 corresponding to the respective through holes 21 are inserted from the side of the through holes 21, and the engagement claws 62 at the tips of the respective engagement portions 58 are engaged. The mating surface 66 is engaged with the opening peripheral edge portion of each engagement hole 44 in the outer flange portion 42 of the second bent side plate portion 28.

  Thus, each of the resin clips inserted into the respective through holes 21 in the outer flange portion 20 portion where the sound absorbing material 14 is overlaid on the first bent side plate portion 26 and the inner attachment portions 36 of the two connecting side plate portions 30 and 30. In the outer flange portion 20 portion of the first sound absorbing pad 16 that is sandwiched between the head portion 39 of the 38 and each inner mounting portion 36 and overlapped with the outer flange portion 42 of the second bent side plate portion 28, the hinge portion 48. Is sandwiched between the vertical plate portion 52 of the reinforcing plate portion 46 bent by the outer flange portion 42 of the second bent side plate portion 28. In addition, the sound absorbing material 14 is overlapped and attached to the cover body 12 of the undercover 10. Although not clearly shown in the figure, under the condition that the under cover 10 in which the sound absorbing material 14 is attached to the cover body 12 is disposed below the engine room with the sound absorbing material 14 side facing upward, Bolts are fixed to the lower surface of the engine room with fixing bolts inserted into the bolt holes 34 of the respective outer mounting portions 32 of the cover body 12.

  As described above, in the under cover 10 according to the present embodiment, the sound absorbing material 14 is in contrast to the first bent side plate portion 26 and the two connecting side plate portions 30, 30 constituting a part of the outer peripheral portion of the cover body 12. Are attached using a plurality of resin clips 38 separate from the sound absorbing material 14 and the cover body 12, but with respect to the second bent side plate portion 28 constituting the remaining portion of the outer peripheral portion of the cover body 12. Without using such a resin clip 38 or the like, the sound absorbing material 14 is connected to a plurality of engaging portions 58 integrally formed with two reinforcing plate portions 46 and 46 hinged to the second bent side plate portion 28, respectively. Attached.

  Therefore, in the under cover 10 of this embodiment as described above, the sound absorbing material 14 is separate from the sound absorbing material 14 and the cover main body 12 over the entire circumference of the cover main body 12. Unlike the conventional product attached using the resin clip 38, the resin clip 38 made of an independent member separate from the sound absorbing material 14 and the cover body 12 is used to attach the sound absorbing material 14 to the cover body 12. The number used can be advantageously reduced. As a result, it is possible to effectively reduce the manufacturing cost associated with the reduction in the number of resin clips 38 used.

  Further, in such an undercover 10, the sound absorbing material 14 is attached to the cover body 12, and each reinforcing plate portion 46 is bent at the hinge portion 48, so that it cannot be attached to the lower surface of the engine room (the outer attachment portion 32). The outer peripheral portion of the cover body 12 is sandwiched between the outer flange portion 20 of the sound absorbing material 14 and the outer flange portion 42 of the second bent side plate portion 28 and the vertical plate portion 52 of the reinforcing plate portion 46. And a double or superposed structure in which they are opposed to each other or overlapped with each other and reinforced so that the bending strength of the outer peripheral portion of the cover body 12 that is not attached to the lower surface of such an engine room is advantageous. Has been enhanced.

  Therefore, in the under cover 10 of this embodiment, the outer periphery of the cover body 12 where the first bent side plate portion 26 and the two connecting side plate portions 30 and 30 are formed is formed on the lower surface of the engine room. Under the attached state, the relatively long outer peripheral portion of the cover main body 12 where the second bent side plate portion 28 is formed is bent due to the weight of the cover main body 12 or the weight of the sound absorbing material 14 and hangs down. This effectively prevents the formation of a gap between the outer peripheral portion of the cover body 12 that hangs down and the lower surface of the engine room. As a result, the noise reduction effect that is the original function of the undercover 10 can be sufficiently and reliably exhibited, and the height from the ground required for the entire undercover can be stably secured. .

  Further, in such an undercover 10, the outer peripheral portion of the sound absorbing material 14 (a part of the outer flange portion 20 of the first sound absorbing pad 16) located in contact with the outer peripheral portion of the cover body 12 that is not attached to the lower surface of the engine room, that is, When the cover body 12 is attached to the lower surface of the engine room, the outer peripheral portion of the sound absorbing material 14 that is not in close contact with the lower surface of the engine room due to the fastening force of the fixing bolt is bent at the hinge portion 48 of the reinforcing plate portion 46. Thus, the outer flange portion 42 of the second bent side plate portion 28 and the vertical plate portion 52 and the horizontal plate portion 50 of the reinforcing plate portion 46 in the cover body 12 can be covered and protected from the outside. As a result, during driving of the automobile, etc., the stepping stone, rainwater, muddy water, etc. are in contact with the outer peripheral portion of the sound absorbing material 14 that is not in close contact with the lower surface of the engine room, and the terminal of the outer peripheral portion of the sound absorbing material 14 is damaged Such damage can be advantageously prevented. As a result, the durability of the sound absorbing material 14 can be advantageously increased.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the above-described embodiment, a plurality of resin clips 38 are used to attach the sound absorbing material 14 to the inner attachment portion 36 formed on the first bent side plate portion 26 and the two connection side plate portions 30 and 30. However, instead of the plurality of resin clips 38, the engaging portion 72 can be integrally formed with the inner mounting portion 36.

  That is, for example, as shown in FIGS. 7 and 8, the opening of the engagement hole 40 on the upper surface of the inner mounting portion 36 is formed in all the inner mounting portions 36 of the first bent side plate portion 26 and each connection side plate portion 30. An engaging portion 72 having a projecting portion 74 projecting upward from the peripheral portion and a hooking portion 76 integrally extending laterally from the projecting portion 74 is integrally formed. Then, the engaging portions 72 are inserted into the through holes 21 provided in the outer flange portion 20 of the sound absorbing material 14 superimposed on the inner attachment portions 36, and the engagement peripheral portions are inserted into the opening peripheral portions of the through holes 21. The sound absorbing material 14 may be attached to the cover body 12 by hooking and engaging the hook portion 74 of the joint portion 72.

  Further, for example, as shown in FIGS. 9 and 10, the opening of the engagement hole 40 on the upper surface of the inner mounting portion 36 is formed in all the inner mounting portions 36 of the first bent side plate portion 26 and each connection side plate portion 30. An engaging portion 72 having a projecting portion 78 projecting upward from the peripheral portion and an engaging claw portion 80 extending integrally from the projecting portion 78 obliquely downward and elastically deformable by a resin spring is integrally formed. Then, the engaging portion 72 is inserted into each through hole 21 provided in the outer flange portion 20 of the sound absorbing material 14 superimposed on each inner mounting portion 36 while elastically deforming the engaging claw portion 80, and The sound absorbing material 14 may be attached to the cover body 12 by engaging the engaging claw 80 restored after insertion with the peripheral edge of the opening of each through hole 21.

  As described above, in order to attach the sound absorbing material 14 to the inner attachment portion 36 formed on the first bent side plate portion 26 and the two connection side plate portions 30, 30, the engaging portion 72 formed integrally with the inner attachment portion 36. , It is possible to eliminate the need to use a plurality of resin clips 38 separate from the sound absorbing material 14 and the cover body 12. As a result, the number of parts of the under cover 10 can be reduced more advantageously, and further cost reduction can be achieved very effectively.

  Furthermore, as shown in FIG. 11, for example, laterally with respect to all upper ends of four side plate portions 82 (only two are shown in FIG. 11) integrally formed on the rectangular cover body 12. The outer flange portion 42 that protrudes and extends in the length direction of each side plate portion 82 is integrally formed, and the reinforcing plate portion 46 is provided on the outer peripheral portion of each outer flange portion 42 via the hinge portion 48 of the side plate portion 82. Although not shown in the figure, they are integrally connected so as to extend around the entire circumference, and are formed on each of the reinforcing plate portions 46 on the under cover 10 of the first embodiment shown in FIGS. 1 and 2. A plurality of engaging portions (58) similar to those are projected. In the same manner as in the first embodiment, each reinforcing plate portion 46 is bent by the hinge portion 48, and each engaging portion (58) is engaged with each engaging hole (44), whereby a sound absorbing material is obtained. 14 may be attached to the cover body 12.

  This also eliminates the need to use a plurality of resin clips 38 that are separate from the sound absorbing material 14 and the cover body 12, and can advantageously reduce the number of parts of the under cover 10. A reduction in the manufacturing cost of the undercover 10 can be effectively realized. In addition, the entire circumference of the outer peripheral portion (outer flange portion 20) of the sound absorbing material 14 is covered and protected by the outer flange portion 42 and each reinforcing plate portion 46 of the cover body 12. . As a result, the entire circumference of the outer periphery of the sound absorbing material 14 is prevented from being damaged by contact with stepping stones, rainwater, muddy water, etc., and the durability of the sound absorbing material 14 can be increased more advantageously. Become.

  Furthermore, in the said Example, although the reinforcement board part 46 was comprised with the L-shaped board | plate material which has the horizontal board part 50 and the vertical board part 52 integrally, for example, this reinforcement board part 46 is comprised. It is also possible to use a flat plate made of only the horizontal plate portion 50. Moreover, the horizontal plate part 50 which exhibits such a flat plate form is provided with a second hinge part extending in the length direction thereof, and the horizontal plate part 50 has an L shape with the second hinge part as a bent part. Even if it is configured to be bent and is further bent at the hinge portion 48 in a state of being bent into an L shape, there is no problem. In any case, the reinforcing plate portion 46 is integrally hinged to the outer peripheral portion of the cover main body 12 while being positioned so as to extend along the outer peripheral portion of the cover main body 12. Any shape can be used as long as the outer peripheral portion of the cover body 12 can be superposed and reinforced as a structure by being folded so as to be overlapped.

  Moreover, the structure of the hinge part 48 which connects the outer peripheral part of the cover main body 12 and the reinforcement board part 46 is not limited at all, for example, the cover which connects the outer peripheral part of the cover main body 12 and the reinforcement board part 46 A concave groove may be provided on the upper surface of the main body 12 portion, and the connecting portion may be thinned.

  Furthermore, the structure of the engaging portion 58 that protrudes integrally with the reinforcing plate portion 46 also protrudes integrally with the surface of the reinforcing plate portion 46 on the side that faces the cover body 12 by bending the reinforcing plate portion 46. As long as it is provided and can be engaged with the engagement hole 44 of the cover body 12 in a state of being inserted into the through hole 21 of the sound absorbing material 14, the structure is not particularly limited. Therefore, for example, the engagement claw 62 may be omitted if sufficient engagement with the engagement hole 44 is possible.

  Furthermore, it goes without saying that the structure and overall shape of the cover main body 12 and the sound absorbing material 14 are not limited to those illustrated.

  The number of the through holes 21 provided in the sound absorbing material 14, the engaging holes 44 provided in the cover main body 12, and the engaging portions 58 provided in the reinforcing plate portion 46 are larger than those of the cover main body 12 and the sound absorbing material 14. It can be changed as appropriate according to the situation.

  In addition, in the above-described embodiment, the present invention includes at least a part of the under floor of the vehicle body other than the lower surface of the engine room of the automobile, in addition to the under cover for the automobile arranged to cover the lower surface of the engine room of the automobile body, Of course, the present invention can be advantageously applied to any vehicle undercover that is disposed so as to cover at least a part of the floor under the vehicle other than the automobile.

  In addition, although not listed one by one, the present invention can be implemented in a mode with various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the invention.

It is a perspective explanatory view showing an example of a vehicle undercover according to the present invention. It is II-II cross-section expansion explanatory drawing in FIG. It is a perspective explanatory view of the sound absorbing material attached to the cover main body of the under cover shown in FIG. It is a perspective explanatory view of the cover main body of the under cover shown in FIG. FIG. 5 is a partially enlarged explanatory view in FIG. 4. It is the elements on larger scale in the VI-VI cross section of FIG. It is a figure corresponding to FIG. 1 which shows another example of the vehicle undercover according to this invention. It is the elements on larger scale in the VIII-VIII cross section of FIG. It is a figure corresponding to FIG. 1 which shows another example of the undercover for vehicles according to this invention. It is the elements on larger scale in the XX cross section of FIG. FIG. 6 is a perspective explanatory view corresponding to FIG. 1 and showing another example of the vehicle undercover according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Under cover 12 Cover main body 14 Sound absorbing material 21 Through hole 26 First side plate portion 28 Second side plate portion 30 Connection side plate portion 36 Inner mounting portion 38 Resin clip 42 Outer flange portion 44 Engagement hole 46 Reinforcement plate portion 48 Hinge portion 58, 72 engaging portion 62 engaging claw 70 through hole

Claims (7)

An under cover having a cover main body made of a resin molded article, arranged to cover at least a part of the floor under the vehicle body, and a sound absorbing material attached to the cover main body,
At least one through hole provided in the outer periphery of the sound absorbing material;
At least one engagement hole provided in the outer peripheral portion of the cover main body corresponding to the through hole;
The cover main body is hinged integrally with the outer peripheral portion while being positioned so as to extend along the outer peripheral portion of the cover main body, and is bent so as to overlap the outer peripheral portion of the cover main body. A reinforcing plate that reinforces the outer periphery of the substrate as a structure,
A member that is integrally projected on the surface of the reinforcing plate on the side facing the cover body by bending of the reinforcing plate, is inserted into the through hole, and is engaged with the engaging hole. With the joint,
And the reinforcing plate portion is caused to be opposed to the outer peripheral portion of the cover body with the outer peripheral portion of the sound-absorbing material being sandwiched between the reinforcing plate portion and the engagement of the reinforcing plate portion. An under cover for a vehicle, wherein the sound absorbing material is attached to the cover body by a portion being inserted through the through hole and engaged with the engagement hole.   An engaging claw that protrudes or extends to the side of the projecting tip side portion of the engaging portion is integrally formed, and the engaging portion is inserted through the through hole and the engaging hole. Under the state, the engagement claw is engaged with the opening peripheral edge portion of the engagement hole in the outer peripheral portion of the cover main body, whereby engagement of the engagement portion with the engagement hole is realized. The vehicle undercover according to claim 1.   A horizontal plate portion hinged to the outer peripheral portion in a state where the reinforcing plate portion is positioned so as to protrude laterally from the outer peripheral portion of the cover body and extend along the outer peripheral portion; and the horizontal plate The vehicle undercover according to claim 1, wherein the undercover for a vehicle according to claim 1 or 2 has an L-shaped cross section integrally formed with a vertical plate portion that rises from a protruding tip of the portion and extends the entire length of the horizontal plate portion.   4. The device according to claim 1, wherein the reinforcing plate portion is hinged to the outer peripheral portion in a state where the reinforcing plate portion is positioned so as to extend along the outer peripheral portion of the cover body. The vehicle undercover according to claim 1.   The connecting portion between the outer peripheral portion of the cover body and the reinforcing plate portion is provided with a concave groove extending along the extending direction of the reinforcing plate portion, and the connecting portion extends over the entire length. By thinning, a hinge portion that connects the reinforcing plate portion so as to be overlapped with the outer peripheral portion of the cover body is formed at the thin connecting portion, and the reinforcing plate portion is formed. The vehicle undercover according to any one of claims 1 to 4, wherein the undercover for the vehicle is hinge-connected to an outer peripheral portion of the cover main body.   The through-hole which makes the said engaging part of this reinforcement board part the non-undercut shape is provided in the outer periphery part of this cover body including the said reinforcement board part hinge-connected by the outer periphery part of the said cover body. The vehicle undercover according to any one of claims 1 to 5. An undercover having a cover main body arranged to cover at least a part of the floor under the vehicle body, and a sound absorbing material attached to the cover main body,
At least one engagement hole is provided in the outer peripheral portion of the sound absorbing material, and at least one engagement portion that can be engaged with the engagement hole with respect to the cover body corresponds to the through hole. An undercover for a vehicle, wherein the sound absorbing material is attached to the cover main body by being integrally provided and the engaging portion being engaged with the engaging hole.

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