JP4951468B2 - Vehicle intake duct - Google Patents

Description

  The present invention relates to a vehicle intake duct.

  For example, as shown in FIGS. 9 and 10, in many automobiles, an engine EG is mounted in an engine room 12 defined in the front portion of the vehicle body 10. As is well known, it is indispensable for the engine EG to supply external air continuously and stably through an air cleaner AC installed in the engine room 12. Therefore, a vehicle intake duct D1 for introducing outside air connected to the air cleaner AC is disposed on the front side of the engine room 12 in the vehicle body 10, and the air cleaner that takes in cold air outside the vehicle through the vehicle intake duct D1. Guide to AC.

  The vehicle intake duct D1 has an air intake in a gap S between an engine hood 14 that can open and close the engine room 12 and a radiator support 16 that is positioned on the front side of the engine room 12 and fixes the radiator RD. It is desirable to arrange so that the entrance 26 faces. However, as shown in FIGS. 10 and 12, the gap S is often difficult to ensure a large vertical dimension due to the vehicle body shape, and the outer shape of the vehicle intake duct D1 has a height dimension. The situation is unavoidable with a wide flat shape that is kept low.

  That is, the vehicle intake duct D1 is made of a synthetic resin molded by a molding technique such as injection molding or blow molding, as shown in a partially broken view in FIG. 11, from the upper wall portion 22 and the lower wall portion 24 facing each other. The duct body 20 is mainly used. The vehicle intake duct D1 has a horizontally long air intake 26 at one end in the longitudinal direction of the bent duct body 20, and a substantially rectangular air outlet 28 at the other end in the longitudinal direction. . As shown in FIGS. 9 and 13, the duct body 20 has a front portion attached to the upper surface of the radiator support 16 by appropriate attachment means BL such as a pin or a bolt, and a rear portion thereof installed in the engine room 12. Connected to the air cleaner AC.

Here, the duct main body 20 of the vehicle intake duct D1 described above is not so high in rigidity due to the thinning and the flat outer shape accompanying the weight reduction. Accordingly, in a normal use state, the upper wall portion 22 and the lower wall portion 24 are depressed due to negative pressure in the duct body 20 when the engine EG is driven or softening of the duct body 20 due to temperature rise in the engine room 12. Concave deformation is likely to occur. In particular, when the front side portion of the duct body 20 in which the horizontally long air intake port 26 is formed is easily deformed, and the opening area of the air intake port 26 decreases due to the deformation of the upper wall portion 22 and the lower wall portion 24, the engine Air cannot be sufficiently taken into the EG. Therefore, as shown in FIGS. 11 and 12, the lower wall portion 24 is provided with a support rib 30 projecting into the duct body 20, and the upper wall portion 22 is supported from the inside by the support rib 30. Measures are taken to solve the aforementioned problems. A technique related to this is disclosed in Patent Document 1, for example.
JP 2004-308453 A

  By the way, the establishment of safety measures for pedestrian protection has been demanded in recent years, and when a pedestrian collides, the vehicle body is deformed appropriately by the impact, so-called `` walking '' "Injury alleviation body" has been developed. For this reason, the engine hood 14 has a structure that is easily deformed downward by an impact force when a pedestrian collides, thereby taking measures to reduce the degree of injury of the pedestrian by absorbing the impact due to the collision. Yes. Therefore, in the vehicle intake duct D1 located directly under the engine hood 14, when the engine hood 14 is deformed, the duct main body 20 itself is deformed and the deformation of the engine hood 14 is not hindered.

  Therefore, the conventional vehicle air intake duct D1 deforms the duct body 20 by compressing and deforming the support rib 30 described above in a bending or bending manner when an external force accompanying the deformation of the engine hood 14 is applied from above. Was to be realized. However, in the case of the duct body 20 that is blow-molded, it is difficult to control the thickness of the support rib 30, and thus the strength of the support rib 30 is likely to vary. For example, when the support rib 30 is formed thicker than specified, the support rib 30 does not deform properly even when a predetermined external force is applied. The problem of inhibiting deformation occurs. In the case of the duct main body 20 formed by bonding the upper wall portion 22 and the lower wall portion 24 formed by injection molding, even if the thickness of the support rib 30 can be controlled relatively easily, an external force is applied. In this case, since the support rib 30 is bent or flexibly compressed and deformed in the same manner, the repulsive force gradually increases as the deformation of the support rib 30 increases, and the load is still adjusted. Has become difficult.

  An object of the present invention is to provide a vehicle air intake duct in which deformation of a duct body is appropriately expressed.

In order to solve the above-mentioned problems and achieve an intended object, the invention according to claim 1 is a vehicle air intake duct including a duct body having a first wall body and a second wall body facing each other.
A recessed wall formed in a recessed shape in the duct body in the second wall,
Projecting into the duct body from the recessed wall, and supporting the first wall from the inside;
A gap portion provided in a portion surrounding the support portion of the recessed wall portion, and separating the support portion and the recessed wall portion into a required length;
A connecting portion that is located between the end portions of the gap portion in a portion that surrounds the support portion, and that allows posture displacement of the support portion;
The gist is provided with a sheet material that is at least adhered to the outer wall surface surrounding the recessed wall portion of the second wall portion and covers the recessed wall portion from the outside of the duct body.

  Therefore, according to the first aspect of the present invention, the support body formed on the recessed wall portion is displaced by the gap portion provided on the recessed wall portion, so that the duct body is allowed to be deformed. Since the gap provided in the recessed wall is closed by the sheet material covering the recessed wall, air outside the duct main body is prevented from flowing into the duct main body through the gap. Is done.

The gist of the invention described in claim 2 is that the recessed wall portion is covered with the sheet material in close contact with the recessed outer wall surface of the recessed wall portion.
Therefore, according to the second aspect of the present invention, when the support portion is displaced, the sheet material in close contact with the recessed outer wall surface is pushed by the supporting portion and separated from the recessed outer wall surface. The posture displacement of the support portion starts smoothly and the deformation load required for deformation of the duct body does not increase.

The gist of the invention described in claim 3 is that the recessed wall portion is covered with the sheet material stretched between the outer wall surfaces.
Therefore, according to the invention according to claim 3, since the sheet material is separated from the recessed wall portion provided with the support portion, the support portion before the deformation is not in contact with the sheet material. The posture displacement starts smoothly and the deformation load required for deformation of the duct body does not increase.

  According to the vehicle air intake duct according to the present invention, the support body is displaced by the gap provided in the recessed wall, so that the deformation of the duct main body is appropriately manifested. And since a gap part is obstruct | occluded with the sheet | seat material which coat | covers a recessed wall part, it is prevented that the air outside a duct main body flows in into a duct main body through this gap | interval part. Moreover, since the posture displacement of the support portion starts smoothly, the deformation load required for the deformation of the duct body does not increase.

  Next, a preferred embodiment of the vehicle air intake duct according to the present invention will be described and described below with reference to the accompanying drawings.

  The vehicle intake duct to which the present application is directed is a gap between the radiator support 16 and the engine hood 14 which are the front vehicle body components of the engine room 12, similarly to the conventional vehicle intake duct D 1 shown in FIGS. 9 to 13. It is installed with the air intake 26 of the duct body 20 facing the S. Therefore, in each embodiment, a vehicle intake duct having a duct body 20 having basically the same outer shape as the conventional vehicle intake duct D1 shown in FIG. 11 is illustrated, and the same components and members are denoted by the same reference numerals. A description will be given. A side of the vehicle intake duct D that faces the front side of the vehicle body 10 is a front side, and a side of the vehicle intake duct D that is connected to the air cleaner AC is a rear side. Further, the vehicle width direction of the vehicle body 10 viewed from the front side of the vehicle body 10 is the left-right direction of the vehicle intake duct D.

(First embodiment)
As shown in FIGS. 1 and 2, the vehicle intake duct D of the first embodiment includes a duct body 20 including an upper wall portion 22 as a first wall body and a lower wall portion 24 as a second wall body facing each other. The upper wall portion 22 is configured to be supported from the inside by a support rib 30 that protrudes into a duct body 20 from a later-described recessed wall portion 36 provided in the lower wall portion 24. As shown in FIG. 1, the duct body 20 is a hollow made of a synthetic resin having a bent cylindrical shape formed by injection molding or blow molding from a synthetic resin material such as polyethylene (PE) or polypropylene (PP). It is a member. In the duct body 20, a horizontally long air intake 26 is formed at a front end which is one end in the longitudinal direction, and an air delivery port 28 is formed at a rear end which is the other end in the longitudinal direction. A cylindrical connecting portion 32 that fits into the air inlet of the air cleaner AC is provided on the outer periphery of the air outlet 28. Further, attachment pieces 34 and 34 extending from the outer surface of the duct body 20 to the side are provided at the front end of the duct body 20. The mounting pieces 34 and 34 are provided with locking holes through which the bolts BL fastened to the upper surface of the radiator support 16 are inserted.

  As shown in FIGS. 1 to 3, a part of the lower wall portion 24 is formed in a portion adjacent to the rear side from the air intake port 26 of the lower wall portion 24, and is recessed toward the inside of the duct body 20. A recessed wall portion 36 is formed. The recessed wall portion 36 is integrally formed with the lower wall portion 24 when the duct main body 20 is formed, and a vertical wall 38 rising to the inside of the duct main body 20 and a flat stepped wall 40 surrounded by the vertical wall 38. It consists of and. As shown in FIGS. 3B and 3C, the step H from the outer wall surface 24 </ b> A of the lower wall portion 24 to the step wall 40 is set to about twice the thickness of the lower wall portion 24. . Further, the front portion 38A of the vertical wall 38 located on the air intake port 26 side is set to have a gentle upward slope toward the rear side of the duct body 20, and the air intake port 26 enters the duct body 20. It is considered that the recessed wall portion 36 protruding into the duct main body 20 does not become a resistance to the air flow taken in. The size of the step H is not limited to about twice the thickness of the lower wall portion 24, and may be larger than this.

  As shown in FIGS. 1 to 3, in the step wall 40 of the recessed wall portion 36, a support rib 30 as a support portion that supports the upper wall portion 22 from the inside protrudes into the duct body 20. Is formed. The support rib 30 is formed in a substantially quadrangular pyramid shape having a curved end, and has a thickness substantially the same as the thickness of the lower wall portion 24 and the recessed wall portion 36. The formation position of the support rib 30 is formed at a position that is biased to the front side from the middle in the front-rear direction of the step wall 40 in consideration of the posture displacement of the support rib 30 to the rear side of the duct body 20 in a collapsed manner. . Furthermore, as shown in FIG. 2, the support rib 30 is formed at a position where the front side portion of the duct body 20 is fixed to the upper surface of the radiator support 16 and the rear side that is detached from the upper surface of the radiator support 16. It is set to be. The formation position of the support ribs 30 is set in this way as shown in FIG. 5 when the support ribs 30 are displaced in a downward posture toward the rear side of the duct body 20. This is because it is necessary to prevent the support rib 30 from interfering with the radiator support 16 in order to project from 36 to the outside of the duct body 20. The shape of the support rib 30 is not limited to the above-described substantially quadrangular pyramid shape, and may be, for example, a cone or elliptical cone shape, a polygonal pyramid shape, a cylinder or a prism shape.

  As shown in FIG. 1 and FIG. 3B, a sheet-like cushioning material 42 made of a nonwoven fabric or urethane is attached to the back surface portion of the upper wall portion 22 where the tip of the support rib 30 faces. Yes. The cushioning material 42 is affixed to prevent the generation of noise due to the direct contact between the support rib 30 and the upper wall portion 22. Therefore, the support rib 30 is configured to support the upper wall portion 22 from the inside via the cushioning material 42. However, if no abnormal noise is generated even when the support rib 30 and the upper wall portion 22 are in contact with each other, or if the level of abnormal noise generation is extremely low, the cushioning material 42 need not be attached.

  As shown in FIG. 1 and FIG. 2 and the like, in a portion surrounding the support rib 30 of the recessed wall portion 36, a gap portion 44 that separates the support rib 30 and the recessed wall portion 36 into a required length, A connecting portion 46 is provided between the end portions of the gap portion 44 and allows the support rib 30 to fall down. Therefore, when an external force is applied to the support rib 30 via the upper wall portion 22, the support rib 30 is displaced in a backward manner due to bending deformation at the connecting portion 46, so that the support rib 30 The support from the inner side of the upper wall portion 22 by 30 is released, and the duct body 20 is configured to be crushed.

  As shown in FIGS. 1 and 3, the gap portion 44 is a slit-like opening formed in the stepped wall 40 of the recessed wall portion 36 so as to surround three sides around the support rib 30. That is, the gap 44 surrounds the support rib 30 along the left edge, the rear edge, and the right edge, which are three sides around the support rib 30, and extends in a substantially U shape in plan view. Therefore, the stepped wall 40 of the recessed wall portion 36 is separated into a portion surrounded by the gap portion 44 and an outer portion thereof, and the portion surrounded by the gap portion 44 is integrated with the base end portion of the support rib 30. It is an outer peripheral piece 30A. The gap 44 is opened by milling or pressing in a subsequent process of forming the duct body 20.

  Further, as shown in FIGS. 3A to 3C, the gap portion 44 has a width of a rear gap portion 44 </ b> B extending along the rear edge portion of the support rib 30 so that the left edge portion of the support rib 30 has a width. And it is larger than the width | variety of each side gap part 44A, 44A extended along the right side edge part. This is the front-rear opening length E of the opening 48 formed when the support rib 30 is displaced in an inclining manner, and the outer peripheral piece portion that is the distance from the connecting portion 46 to the rear end portion of the outer peripheral piece portion 30A. It depends on the dimensional relationship with the longitudinal length G of 30A. That is, in order to increase the lying angle of the support rib 30, as shown in FIG. 3A and FIG. 5, the front and rear opening length E of the opening 48 is set from the connecting portion 46 to the tip of the support rib 30. It is longer than the support height F. Further, in order to increase the tilt angle of the support rib 30, as shown in FIG. 3B and FIG. 5, the longitudinal length G of the outer peripheral piece 30A is made as short as possible so that the support rib 30 is posture-displaced in a tilted manner. In doing so, the protruding amount by which the outer peripheral piece 30A protrudes to the outside of the duct body 20 is reduced.

  The continuous portion 46 is a portion along the front edge portion of the support rib 30 that is located between the both end portions 44 </ b> C and 44 </ b> C in the gap portion 44, and is a portion surrounded by the gap portion 44. And the stepped wall 40 of the recessed wall portion 36 that is an outer portion of the gap portion 44 is continuously provided. Therefore, when the front end of the support rib 30 or the rear end portion of the outer peripheral piece portion 30A is pushed from above, the connecting portion 46 is bent and deformed. It should be noted that the deformation load that causes the bending deformation in the continuous portion 46 is the extension length of the continuous portion 46 (distance between the end portions 44C and 44C of the gap portion 44) or the depression in the continuous portion 46. By adjusting the wall thickness and the like of the wall portion 36, the wall portion 36 is adjusted so as not to be bent when an external force assumed in the normal use state is applied to the support rib 30. Therefore, in a normal use state, the support rib 30 is always held in the standing state shown in FIGS. 3B and 3C, and the deformation of the upper wall portion 22 in the duct body 20 is prevented. On the other hand, when an external force larger than the external force in the normal use state is applied to the support rib 30, the support rib 30 is displaced in an inclining manner due to bending deformation at the connecting portion 46, and the duct body 20 is collapsible. Deformation is allowed.

  As shown in FIGS. 1 to 4, the vehicle intake duct D of the first embodiment is provided with a slit-like gap portion 44 in the recessed wall portion 36, so that the recessed wall portion of the lower wall portion 24 is provided. A sheet material 50 is provided which is bonded at least to the outer wall surface 24 </ b> A surrounding the 36 and covers the recessed wall portion 36 from the outside of the duct body 20. The sheet material 50 is formed of a material such as nonwoven fabric or vinyl, and is formed in a shape / size larger than the outer size of the recessed wall portion 36, and is bonded to the outer wall surface 24A of the lower wall portion 24. For convenience, the edge bonding portion 52 is divided into an inner covering portion 54 that covers the recessed outer wall surface 36A that combines the outer surfaces of the vertical wall 38 and the stepped wall 40. The inner covering portion 54 of the sheet material 50 has a convex shape along the recessed outer wall surface 36A of the recessed wall portion 36, and is adhered in a state of being in close contact with the recessed outer wall surface 36A. That is, the recessed wall portion 36 is covered with the sheet material 50 in close contact with the recessed outer wall surface 36 </ b> A of the recessed wall portion 36. The adhesive of the sheet material 50 to the outer wall surface 24A and the recessed outer wall surface 36A of the lower wall portion 24 uses various adhesives or double-sided tape. Further, the sheet material 50 described above is preferably airtight, and when a non-woven fabric is used as a material, a double-sided tape is applied to the entire surface of the edge bonding portion 52 and the inner covering portion 54 on the side to be bonded to the duct body 20. By sticking, it is possible to give airtightness.

  Accordingly, the duct body 20 is configured so that the inside and outside of the duct body 20 do not communicate with each other through the gap portion 44 because the gap portion 44 is closed by the sheet material 50 covering the recessed wall portion 36. Thus, when the engine EG is driven and outside air is taken into the duct main body 20 from the air intake port 26, even if the inside of the duct main body 20 has a negative pressure, the air outside the duct main body 20 is separated by the gap 44. It is prevented from flowing into the duct body 20 via the.

  Further, when the inner covering portion 54 of the sheet material 50 is pushed from the inner side by the support rib 30 that has started to be inclining, the inner covering portion 54 is separated from the recessed outer wall surface 36 </ b> A and separated from the recessed wall portion 36. ing. That is, when the posture of the support rib 30 is lowered, the support rib 30 gradually protrudes to the outside of the recessed wall portion 36 through the opening 48, so that the support rib 30 is adhered to the recessed outer wall surface 36A. The inner covering portion 54 is pressed from the inside by the support rib 30. Accordingly, the inner covering portion 54 gradually peels from the peripheral portion of the outer peripheral piece 30A of the support rib 30. Note that the edge bonding portion 52 bonded to the outer wall surface 24A does not peel from the outer wall surface 24A even if the inner covering portion 54 is pushed by the support rib 30 and peels from the recessed outer wall surface 36A. .

  3B and 3C, the inner covering portion 54 separated from the recessed outer wall surface 36A and separated from the recessed wall portion 36 is formed on the recessed wall portion 36. As shown in FIG. The deformed outer wall surface 36A is deformed into a convex shape that is symmetrical to the outer surface shape, and protrudes outward from the outer wall surface 24A of the lower wall portion 24 to become loose. Therefore, as shown in FIG. 5, the inner covering portion 54 pushed by the outer peripheral piece 30 </ b> A in the process in which the inclination angle of the support rib 30 gradually increases and the outer peripheral piece 30 </ b> A protrudes to the outside of the duct body 20. Is gradually deformed outward, and when the support rib 30 is displaced from the upright state to about 70 degrees, it is in a stretched state. Therefore, in the vehicle intake duct D of the first embodiment, even if the sheet material 50 is formed from a material that does not have extensibility, the inclining posture displacement of the support rib 30 proceeds smoothly.

  That is, in the vehicle intake duct D of the first embodiment, when a large external force greater than the external force in a normal use state is applied to the support rib 30 provided on the recessed wall portion 36, the bending at the connecting portion 46 is performed. The deformation of the duct body 20 is allowed because the support rib 30 is displaced in a tilted manner due to the deformation. In addition, when the support rib 30 is displaced in an inclining posture, the inner covering portion 54 of the sheet material 50 pressed by the support rib 30 is separated from the recessed outer wall surface 36 </ b> A and separated from the recessed wall portion 36. Therefore, the posture displacement of the support rib 30 starts smoothly. Thereby, since the sheet material 50 does not obstruct this when the inclining posture displacement of the support rib 30 is started, the deformation of the duct body 20 proceeds smoothly, which is required for the deformation of the duct body 20. Deformation load does not increase.

(Second embodiment)
FIGS. 6-8 is drawing which showed the support rib 30 of the vehicle intake duct D which concerns on 2nd Embodiment, and its peripheral part. In the vehicle intake duct D according to the second embodiment, the recessed wall portion 36 provided in the lower wall portion 24 of the duct body 20, the support rib 30 provided in the recessed wall portion 36, and the support rib in the recessed wall portion 36. The gap portion 44 and the continuous portion 46 provided around 30 are the same as those in the first embodiment described above, and the mounting mode of the sheet material 50 covering the recessed wall portion 36 to the duct body 20 is changed. . Accordingly, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Only the sheet material 50 and the mounting mode of the sheet material 50 will be described.

  The sheet material 50 of the second embodiment is extended in the same plane as the outer wall surface 24A surrounding the recessed wall portion 36 of the lower wall portion 24, and covers the recessed wall portion 36 without contacting the recessed outer wall surface 36A. To do. The sheet material 50 is formed of a material such as a nonwoven fabric or vinyl, as in the first embodiment described above, and is formed in a shape / size larger than the outline size of the recessed wall portion 36, and is bonded to the edge. The portion 52 and the inner covering portion 54 are a flat sheet material forming a single plane. In the sheet material 50, the edge bonding portion 52 is bonded to the outer wall surface 24A surrounding the recessed wall portion 36 of the lower wall portion 24, and the inner covering portion 54 is spaced from the recessed outer wall surface 36A and stretched between the outer wall surfaces 24A. Passed. That is, the recessed wall portion 36 is covered with the sheet material 50 that is stretched over the outer wall surface 24A and does not adhere to the recessed outer wall surface 36A. Accordingly, the duct body 20 is configured such that the inside and outside of the duct body 20 do not communicate with each other through the gap portion 44 because the gap portion 44 is closed by the sheet material 50 covering the recessed wall portion 36. Is prevented from flowing into the duct body 20 through the gap 44. As described above, when the sheet material 50 is formed of a non-woven fabric, air-tightness is imparted by sticking a double-sided tape to the entire surface of the edge bonding portion 52 and the inner covering portion 54 on the duct body 20 side. It is possible.

  In the second embodiment, as shown in FIGS. 6 (b) and 6 (c), the support rib 30 before the posture displacement and the inner covering portion 54 of the sheet material 50 are separated at the same interval as the step H. Therefore, the supporting rib 30 is not in contact with the sheet material 50 until the posture is displaced in the inclined state shown by the two-dot chain line in FIGS. 6B and 8. Therefore, in the vehicle intake duct D of the second embodiment, when a large external force greater than the external force in the normal use state is applied to the support rib 30 provided in the recessed wall portion 36, the bending at the connecting portion 46 is performed. The deformation of the duct body 20 is allowed because the support rib 30 is displaced in a tilted manner due to the deformation. In addition, when the support rib 30 is displaced in an inclining posture, the posture displacement of the support rib 30 is not restricted at all until it comes into contact with the inner covering portion 54 of the sheet material 50 that is separated from the recessed wall portion 36. Then, the posture displacement of the support rib 30 starts smoothly. That is, since the sheet material 50 does not obstruct this when the supportive posture of the support rib 30 is started, the deformation of the duct body 20 proceeds smoothly, and the deformation required for the deformation of the duct body 20. The load does not increase.

  In the second embodiment, when the support rib 30 further presses the inner covering portion 54 after the support rib 30 contacts the inner covering portion 54, the edge of the sheet material 50 adhered to the outer wall surface 24A. If the bonding portion 52 is peeled off from the outer wall surface 24A, the amount of posture displacement of the support rib 30 can be increased as shown in FIG.

(Example of change)
In the first embodiment, if the step H in the recessed wall portion 36 is set to be large, the timing at which the inner covering portion 54 pushed by the support rib 30 whose posture is displaced in a collapsed manner is extended or delayed is supported. Since the inner covering portion 54 can be prevented from being expanded even if the rib 30 is displaced in the maximum manner, the amount of posture displacement of the support rib 30 can be increased. Similarly, in the second embodiment, if the step H in the recessed wall portion 36 is set to be large, the timing at which the support rib 30 whose posture is displaced in contact with the inner covering portion 54 is delayed, or the support rib 30 is at the maximum. Even if the posture of the support rib 30 is displaced in an inclining manner, the inner cover portion 54 can be prevented from coming into contact, so that the amount of posture displacement of the support rib 30 can be increased.

  In the first embodiment, as in the second embodiment, after the inner covering portion 54 is in a stretched state, the support rib 30 is adhered to the outer wall surface 24A when the inner covering portion 54 is further pressed. If the edge adhesion portion 52 of the sheet material 50 is peeled off from the outer wall surface 24A, the amount of posture displacement of the support rib 30 can be made larger than the state shown in FIG.

  In the first embodiment and the second embodiment, if the sheet material 50 is formed of a stretchable material, the inner covering portion 54 pressed by the support rib 30 can be deformed in an extensible manner. Even if it adheres to the outer wall surface 24A, the amount of posture displacement of the support rib 30 can be increased.

  In the first embodiment, as the sheet material 50, a flat sheet material having the edge bonding portion 52 and the inner covering portion 54 as a single plane, or the inner covering portion 54 matches the recessed outer wall surface 36A of the recessed wall portion 36. It is possible to use a molded sheet material preformed into a shape to be formed. In the case of the sheet material 50 made of a flat sheet material, the inner covering portion 54 is bonded to the recessed outer wall surface 36A while the inner covering portion 54 is pushed and deformed toward the recessed wall portion 36.

  In the first embodiment, the case where the inner covering portion 54 is bonded to the recessed outer wall surface 36A of the recessed wall portion 36 is exemplified, but the inner covering portion 54 is adhered to the recessed outer wall surface 36A without being bonded. It may be.

  In the first embodiment and the second embodiment, the mode in which the support rib 30 is posture-displaced in a downward manner toward the rear side of the duct body 20 is illustrated, but the mode of the posture displacement of the support rib 30 is not limited thereto. For example, even if the posture displacement of the support rib 30 is an aspect in which the support rib 30 moves up and down in the inward and outward directions of the duct body 20, the sheet material 50 does not hinder the vertical displacement of the support rib 30; Effects similar to those of the embodiment and the second embodiment can be obtained.

It is a partially broken perspective view showing the state where the vehicle intake duct of the first embodiment is attached to the front side of the vehicle body. It is the II-II sectional view taken on the line of FIG. (a) is the partial perspective view which showed the recessed wall part provided in the duct main body in the vehicle intake duct of 1st Embodiment, a support rib, a gap | interval part, a connection part, and a sheet | seat material, (b) It is the IIIb-IIIb sectional view taken on the line of (a), (c) is the IIIc-IIIc sectional view taken on the line of (a). It is the perspective view which showed the state which mounts | wears with a sheet | seat material so that a recessed wall part may be coat | covered in 1st Embodiment. FIG. 5 is a side cross-sectional view showing a state in which the external force due to the deformation of the engine hood is applied to the support rib in the first embodiment, whereby the support rib is incliningly displaced and the duct body is crushed. (a) is a partial perspective view showing a recessed wall portion, a support rib, a gap portion, a continuous portion and a sheet material provided in the duct body in the vehicle air intake duct of the second embodiment, (b) It is VIb-VIb sectional view taken on the line of (a), (c) is VIc-VIc sectional view taken on the line of (a). It is the perspective view which showed the state which mounts | wears with a sheet | seat material so that a recessed wall part may be coat | covered in 2nd Embodiment. FIG. 10 is a side sectional view showing a state in which an external force due to deformation of an engine hood is applied to the support rib in the second embodiment, whereby the support rib is incliningly displaced and the duct body is crushed. 1 is a perspective view schematically showing the inside of an engine room in a vehicle. FIG. 10 is a sectional view taken along line XX in FIG. 9. FIG. 10 is a partially cutaway perspective view of the conventional vehicle intake duct illustrated in FIG. 9. FIG. 12 is a side sectional view showing a state in which the conventional vehicle intake duct illustrated in FIG. 11 is assembled to the front side of the vehicle in a state before the engine hood is deformed. FIG. 12 is a side sectional view showing a state in which the conventional vehicle intake duct illustrated in FIG. 11 is assembled on the front side of the vehicle in a state in which an external force accompanying deformation of the engine hood is applied.

Explanation of symbols

20 Duct body, 22 Upper wall part (first wall), 24 Lower wall part (second wall)
24A outer wall surface, 30 support ribs (support portion), 36 recessed wall portion, 36A recessed outer wall surface 44 gap portion, 46 connecting portion, 50 sheet material

Claims (3)

In a vehicle air intake duct including a duct body having a first wall body and a second wall body facing each other,
A recessed wall formed in a recessed shape in the duct body in the second wall,
Projecting into the duct body from the recessed wall, and supporting the first wall from the inside;
A gap portion provided in a portion surrounding the support portion of the recessed wall portion, and separating the support portion and the recessed wall portion into a required length;
A connecting portion that is located between the end portions of the gap portion in a portion that surrounds the support portion, and that allows posture displacement of the support portion;
A vehicle air intake duct comprising: a sheet material that is at least bonded to an outer wall surface surrounding the recessed wall portion of the second wall portion and covers the recessed wall portion from the outside of the duct body.   2. The vehicle intake duct according to claim 1, wherein the recessed wall portion is covered with the sheet material in close contact with a recessed outer wall surface of the recessed wall portion.   The vehicle intake duct according to claim 1, wherein the recessed wall portion is covered with the sheet material stretched between the outer wall surfaces.

Images