JP2021049931A - Vehicle floor duct device - Google Patents

Abstract

To provide a vehicle floor duct structure which is effective for enhancing rigidity at low costs.SOLUTION: A vehicle floor duct structure 1 includes: a floor panel 10 having a tunnel part 12 protruding to the vehicle cabin side and extending in a vehicle length direction X; a silencer member 20 laid on the floor panel 10; a floor carpet 30 laid on the silencer member 20; and a duct member 40 disposed between the silencer member 20 and the floor carpet 30 along the tunnel part 12. The silencer member 20 is provided with a recessed part 21 in which an outer surface 20a is recessed inward according to a shape of the duct member. The duct member 40 has: a ventilation part 41 having a ventilation passage 42; and reinforcement parts 43, 44 which are provided at the ventilation part 41 so as to fill gaps Sa, Sb between the ventilation part 41 and the recessed part 21 of the silencer member 20.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle floor duct structure.

Patent Document 1 below discloses this type of floor duct structure. In this floor duct structure, a tunnel portion (protruding portion) extending in the front-rear direction is formed in the central portion of the floor panel, and a carpet is laid on the floor panel via a silencer member forming a cushioning layer. There is. Further, in the area between the floor panel and the carpet excluding the silencer member, a hollow duct member is provided to allow air conditioning air to flow.

Japanese Unexamined Patent Publication No. 63-255139

By the way, when the silencer member is made by press molding using a fiber material such as felt or a fiber aggregate, if a recess for assembling the duct member is provided on the outer surface of the silencer portion, the duct is provided when the duct member is assembled. A gap is created between the member and the recess of the silencer member, and this gap can cause a decrease in the rigidity of the floor duct structure.

Therefore, in order to prevent a decrease in the rigidity of the floor duct structure, it is conceivable to fill the gap between the recess of the silencer member and the duct member with a member such as chip urethane. However, this measure is disadvantageous in terms of cost because it requires a separate member and increases man-hours.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a floor duct structure for a vehicle which is effective for increasing rigidity at low cost.

One aspect of the present invention is
A floor panel with a tunnel that protrudes toward the passenger compartment and extends in the direction of the vehicle length,
The silencer member laid on the floor panel and
The floor carpet laid on the silencer member and
A duct member interposed between the silencer member and the floor carpet along the tunnel portion, and
With
The silencer member is provided with a recess whose outer surface is recessed inward according to the shape of the duct member.
The duct member is a vehicle floor duct structure having a ventilation portion having a ventilation passage and a reinforcing portion provided in the ventilation portion so as to fill a gap between the recess of the silencer member.
It is in.

In this vehicle floor duct structure, the gap between the duct member and the recess of the silencer member can be filled by a reinforcing portion provided in the ventilation portion of the duct member. Therefore, it is possible to prevent the rigidity of the floor duct structure from being lowered due to this gap. Further, by providing the reinforcing portion in the ventilation portion of the duct member, it is not necessary to prepare another member other than the duct member to fill the gap, and the work of assembling this separate member does not occur. Therefore, this floor duct structure It is possible to prevent the cost required for the above from increasing.

As described above, according to the above aspect, it is possible to provide a vehicle floor duct structure effective for increasing rigidity at low cost.

The perspective view of the floor duct structure for a vehicle of Embodiment 1. FIG. Top view of FIG. The figure which shows the state of the press molding of the silencer member in FIG. 1 schematically. FIG. 2 is a cross-sectional view taken along the line IV-IV of FIG. A perspective view of the duct member in FIG. 4 as viewed from the surface side of the bottom plate portion. A perspective view of the duct member in FIG. 4 as viewed from the back surface side of the bottom plate portion. A partial cross-sectional view showing how an assembly is made by combining a floor carpet and a duct member. The perspective view corresponding to FIG. 6 about the floor duct structure for a vehicle of Embodiment 2. FIG. 6 is a cross-sectional view of the vehicle floor duct structure of the third embodiment corresponding to FIG.

Preferred embodiments of the above embodiments will be described below.

In the floor duct structure for a vehicle, the ventilation portion is erected from the bottom plate portion to be joined to the first member to be joined, which is one of the floor carpet and the silencer member, and the floor. It has two standing wall portions to be joined to the carpet and the second member to be joined, which is the other of the silencer members, and has the bottom plate portion and the above 2 in the cross section including the vehicle width direction and the vehicle height direction. It is preferable that the cross-sectional shape formed by the two standing wall portions is substantially U-shaped, and the ventilation path is formed between the two standing wall portions and the second member to be joined.

According to this vehicle floor duct structure, when the bottom plate portion is joined to the floor carpet, the ventilation portion of the duct member opens on the silencer member side and forms a ventilation passage with the silencer member. On the other hand, when the bottom plate portion of the duct member is joined to the silencer member, the ventilation portion opens on the floor carpet side and forms a ventilation passage with the floor carpet. At this time, since the ventilation portion of the duct member is open on one side, the weight of the duct member can be reduced and the material cost required for the duct member can be kept low.

In the vehicle floor duct structure, it is preferable that the ventilation portion is configured such that the surface of the bottom plate portion facing the floor carpet is joined to the floor carpet.

According to this vehicle floor duct structure, when an external load is input to the floor carpet, the external load can be received on the surface of the bottom plate portion, and the bottom plate portion can be supported by each upright wall portion. Therefore, it is possible to prevent the floor carpet from being dented due to the external load input to the floor carpet, and it is possible to prevent the rigidity of the floor duct structure from being lowered due to the shape of the duct member itself. In addition, since the back surface of the floor carpet and the surface of the bottom plate of the ventilation part can be directly joined to pre-assemble the floor carpet and the duct member, the work of assembling the duct member on the vehicle body manufacturing line is abolished. can do.

In the vehicle floor duct structure, the reinforcing portion has a support plate portion extending from at least one of the two standing wall portions along the outer surface of the silencer member, and a support plate portion extending from the support plate portion to the cross section. It preferably has ribs that extend along it.

According to this vehicle floor duct structure, by forming the reinforcing portion by utilizing the ribs supported by the supporting plate portion, it is possible to reduce the weight of the reinforcing portion while ensuring the rigidity of the reinforcing portion.

In the vehicle floor duct structure, it is preferable that the duct members are provided on both sides of the tunnel portion of the floor panel in the vehicle width direction.

According to this vehicle floor duct structure, duct members are provided on both sides of the tunnel portion in the vehicle width direction, where the external load is input less frequently and the assumed external load is smaller than above the tunnel portion of the floor panel. By providing the duct member, the load capacity can be suppressed to be smaller than that in the case where the duct member is provided above the tunnel portion. Therefore, the weight of the duct member can be reduced, and the material cost required for the duct member can be kept low.

Hereinafter, embodiments of the vehicle floor duct structure provided in the vehicle will be described with reference to the drawings.

In the drawings used in the description of the present specification, the front of the vehicle is indicated by an arrow FR, the upper part of the vehicle is indicated by an arrow UP, and the inside of the vehicle is indicated by an arrow IN. Unless otherwise specified, the vehicle length direction is indicated by an arrow X, the vehicle width direction is indicated by an arrow Y, and the vehicle height direction is indicated by an arrow Z.

(Embodiment 1)
As shown in FIGS. 1 and 2, the vehicle floor duct structure (hereinafter, simply referred to as “floor duct structure”) 1 of the first embodiment includes a floor panel 10, a silencer member 20, and a floor carpet 30. It includes a duct member 40.

The floor panel 10 is configured as a front floor panel from the lower end of the dash panel to the foot of the rear seat among the panels on the floor surface of the vehicle. At the center of the floor panel 10 in the vehicle width direction Y, a tunnel portion 12 that protrudes from the flat plate portion 11 toward the vehicle interior 2 side and extends in the vehicle length direction X is provided. The cross-sectional shape of the tunnel portion 12 when viewed in the vehicle length direction X is a substantially U-shape with the opening facing downward.

The protruding portion as the tunnel portion 12 has a function as a reinforcing member (longitudinal member) extending in the vehicle length direction X. Although not particularly shown, members such as an exhaust system, a change mechanism, a parking brake, and a propeller shaft are appropriately inserted inside the tunnel portion 12 by utilizing the tunnel shape.

The silencer member 20 is laid on the floor panel 10. The silencer member 20 has a soundproofing function, a function of preventing the uneven shape of the floor panel 10 from appearing on the surface of the floor carpet 30, a function of giving a cushioning property to an occupant, and the like.

The floor carpet 30 is laid on the silencer member 20 so as to face the vehicle interior 2. Therefore, the silencer member 20 is interposed between the floor panel 10 and the floor carpet 30. Of the floor carpet 30, the front regions 30a on both sides of the tunnel portion 12 on both sides in the vehicle width direction Y are used as regions to which the legs of the front seats are attached. The rear area 30b of the floor carpet 30 behind the front area 30a is used as an area to which the legs of the rear seats are attached. Of the floor carpet 30, the central region 30c in the center in the vehicle width direction Y is used as an region to which a console box or the like is mounted. As the material of the floor carpet 30, it is typically preferable to use a synthetic resin material that has been subjected to a water-repellent treatment, a flameproof treatment, or the like.

The duct member 40 is for allowing air conditioning air to flow, and is interposed between the silencer member 20 and the floor carpet 30 along the tunnel portion 12. The material of the duct member 40 is not limited, but it is preferable to use a resin material in order to reduce the weight.

As shown in FIG. 3, the silencer member 20 is molded using the press molding die D. A work made of a fiber material such as felt or a fiber aggregate is sandwiched between the upper die D1 and the lower die D2 constituting the press forming die D, and the upper die D1 and the lower die D2 are moved relative to each other in the proximity direction. Is press-molded.

By this press molding, the silencer member 20 having a shape corresponding to the surface shape of the tunnel portion 12 of the floor panel 10 and the shape of the duct member 40 can be produced. At this time, in the silencer member 20, the outer surface 20a is recessed inward according to the shape of the duct member 40 in the inclined portions on both sides of the convex portion 20b formed according to the surface shape of the tunnel portion 12. The recess 21 is formed. Each recess 21 is used to assemble the duct member 40 to the silencer member 20.

As shown in FIG. 4, the recess 21 of the silencer member 20 extends in the vehicle length direction X while maintaining substantially the same cross-sectional shape with respect to the cross section including the vehicle width direction Y and the vehicle height direction Z.

The duct members 40 are provided on both sides of the tunnel portion 12 of the floor panel 10 in the vehicle width direction Y. Each duct member 40 has a ventilation portion 41 having a ventilation passage 42 capable of circulating conditioned air, and two reinforcing portions 43, 44 integrally provided on both sides of the ventilation portion 41 in the vehicle height direction Z. .. The duct member 40 extends in the vehicle length direction X while maintaining substantially the same cross-sectional shape with respect to the cross section including the vehicle width direction Y and the vehicle height direction Z.

When one of the floor carpet 30 and the silencer member 20 is the floor carpet 30 as the first member to be joined and the other silencer member 20 is the second member to be joined, the ventilation portion 41 is the first member to be joined. It has a bottom plate portion 41a joined to the bottom plate portion 41a and two standing wall portions 41b standing upright from the bottom plate portion 41a and joined to the second member to be joined.

The bottom plate portion 41a of the ventilation portion 41 is arranged substantially parallel to the tunnel portion 12. The surface 41c of the bottom plate portion 41a facing the floor carpet 30 constitutes a joint surface with respect to the floor carpet 30 which is the first member to be joined. On the other hand, the two standing wall portions 41b of the ventilation portion 41 are arranged substantially perpendicular to the bottom plate portion 41a. The tip surface of each of these two standing wall portions 41b constitutes a joint surface with respect to the silencer member 20 which is the second member to be joined.

Therefore, the ventilation portion 41 has an opening on the silencer member 20 side, and has a cross-sectional shape formed by the bottom plate portion 41a and the two standing wall portions 41b in a cross section including the vehicle width direction Y and the vehicle height direction Z. It is roughly U-shaped. That is, the ventilation portion 41 has a cross-sectional shape that is convex toward the vehicle interior 2 side. The ventilation portion 41 is configured to form a ventilation passage 42 between the back surface 41d of the bottom plate portion 41a facing the silencer member 20 and the silencer member 20.

Each duct member 40 is arranged along the inclined portion of the tunnel portion 12. When each duct member 40 is viewed in the vehicle length direction X, the width dimension of the ventilation portion 41 with respect to the inclination direction of the inclined portion of the tunnel portion 12 is substantially constant from the silencer member 20 side toward the floor carpet 30 side. .. On the other hand, since each duct member 40 includes two reinforcing portions 43 and 44, the width dimension of the entire duct member 40 with respect to the inclined direction of the inclined portion of the tunnel portion 12 is the floor carpet from the silencer member 20 side. It is gradually expanded toward the 30th side.

As shown in FIGS. 4 to 6, the reinforcing portion 43 is provided in the ventilation portion 41 so as to fill the gap Sa (see FIG. 4) between the ventilation portion 41 of the duct member 40 and the recess 21 of the silencer member 20. Has been done. Here, the gap Sa is a gap that can be formed in the upper corner region 21a of the recess 21 of the silencer member 20 when the duct member 40 is assembled.

The reinforcing portion 43 includes a support plate portion 43a extending from one of the standing wall portions 41b of the ventilation portion 41 along the outer surface 20a of the silencer member 20, and a vehicle width direction Y and a vehicle height direction Z from the support plate portion 43a. It has ribs 43b extending along a cross section including. In the reinforcing portion 43, a plurality of ribs 43b having the same plate thickness are arranged in parallel with each other at intervals in the vehicle length direction X.

The reinforcing portion 44 is provided in the ventilation portion 41 so as to fill the gap Sb (see FIG. 4) between the ventilation portion 41 of the duct member 40 and the recess 21 of the silencer member 20. Here, the gap Sb is a gap that can be formed in the lower corner region 21b of the recess 21 of the silencer member 20 when the duct member 40 is assembled.

The reinforcing portion 44 includes a support plate portion 44a extending from the other standing wall portion 41b of the ventilation portion 41 along the outer surface 20a of the silencer member 20, and a vehicle width direction Y and a vehicle height direction Z from the support plate portion 44a. With ribs 44b extending along a cross section including. In the reinforcing portion 44, a plurality of ribs 44b having the same plate thickness are arranged in parallel with each other at intervals in the vehicle length direction X.

When assembling the floor duct structure 1 described above, it is preferable to pre-join the duct member 40 to at least one of the floor carpet 30 and the silencer member 20. For example, as shown in FIG. 7, an assembly A composed of a floor carpet 30 and a duct member 40 is prepared in advance. After that, in the vehicle body manufacturing line, this assembly A is joined to the silencer member 20 assembled to the floor panel 10.

Since the duct member 40 has a shape in which the silencer member 20 side of the ventilation portion 41 is open, when preparing the assembly A, the back surface of the floor carpet 30 and the surface 41c of the bottom plate portion 41a of the ventilation portion 41 do not pass through a space or the like. It can be brought into close contact directly. Therefore, with the hot melt adhesive or the like applied to at least one of the back surface of the floor carpet 30 and the front surface 41c of the bottom plate portion 41a, both sides of the front surface of the floor carpet 30 and the back surface 41d of the bottom plate portion 41a are used with a jig or the like. A load can be applied by sandwiching it from (see the arrow in FIG. 7).

Thereby, the assembly A composed of the floor carpet 30 and the duct member 40 can be easily manufactured. Further, since the back surface of the floor carpet 30 and the surface 41c of the bottom plate portion 41a of the ventilation portion 41 can be directly joined to form the floor carpet 30 and the duct member 40 in advance, the duct member can be assembled in the manufacturing line of the vehicle body. The work of assembling the 40 can be abolished.

According to the above-described first embodiment, the following effects can be obtained.

In the floor duct structure 1 described above, the gaps Sa and Sb between the duct member 40 and the recess 21 of the silencer member 20 can be filled by the reinforcing portions 43 and 44 provided in the ventilation portion 41 of the duct member 40. Therefore, it is possible to prevent the rigidity of the floor duct structure 1 from being lowered due to the gaps Sa and Sb. Further, by providing the reinforcing portions 43 and 44 in the ventilation portion 41 of the duct member 40, it is not necessary to prepare another member other than the duct member 40 to fill the gaps Sa and Sb, and the work of assembling these separate members is also possible. Since it does not occur, it is possible to prevent the cost required for the floor duct structure 1 from increasing.

Therefore, according to the above-described first embodiment, it is possible to provide the floor duct structure 1 which is effective for increasing the rigidity at low cost.

According to the floor duct structure 1 described above, since the bottom plate portion 41a of the ventilation portion 41 of the duct member 40 is joined to the floor carpet 30, the silencer member 20 side is opened and the ventilation passage 42 is provided between the ventilation portion 41 and the silencer member 20. Form. At this time, since the ventilation portion 41 of the duct member 40 is open on one side, the weight of the duct member 40 can be reduced, and the material cost required for the duct member 40 can be kept low.

Further, when an external load is input to the floor carpet 30, the external load can be received by the surface 41c of the bottom plate portion 41a, and the bottom plate portion 41a can be supported by each of the standing wall portions 41b. Therefore, it is possible to prevent the floor carpet 30 from being dented due to the external load input to the floor carpet 30, and it is possible to prevent the rigidity of the floor duct structure 1 from being lowered due to the shape of the duct member 40 itself. it can.

According to the floor duct structure 1 described above, the reinforcing portions 43 and 44 are formed by using the ribs 43b and 44b supported by the supporting plate portions 43a and 44a, thereby ensuring the rigidity of the reinforcing portions 43 and 44. The weight can be reduced.

According to the floor duct structure 1 described above, both sides of the tunnel portion 12 in the vehicle width direction Y have a lower frequency of external load input and a smaller assumed external load than the upper part of the tunnel portion 12 of the floor panel 10. By providing the duct member 40 in the tunnel portion 12, the load capacity can be suppressed to be smaller than in the case where the duct member 40 is provided above the tunnel portion 12. Therefore, the weight of the duct member 40 can be reduced, and the material cost required for the duct member 40 can be kept low.

Hereinafter, other embodiments related to the above-described first embodiment will be described with reference to the drawings. In other embodiments, the same elements as those in the first embodiment are designated by the same reference numerals, and the description of the same elements will be omitted.

(Embodiment 2)
As shown in FIG. 8, the floor duct structure 101 of the second embodiment has a different structure of the duct member 140 from that of the floor duct structure 1 of the first embodiment.

The duct member 140 includes a plurality of bosses 50 and 60 on the back surface 41d of the bottom plate portion 41a of the ventilation portion 41. The boss 50 has a tubular wall portion 51 extending in an elongated hole shape along the vehicle length direction X, and a plurality of (six in FIG. 8) plate piece portions 52 joined to the outer peripheral surface of the tubular wall portion 51. .. The boss 60 is configured as a cylindrical wall portion. In the present embodiment, the three bosses 60 are arranged at intervals in the vehicle length direction X.

Other configurations are the same as those in the first embodiment.

According to the floor duct structure 101 of the second embodiment described above, the rigidity of the duct member 140 itself can be increased by providing the bosses 50 and 60 on the back surface 41d of the bottom plate portion 41a of the duct member 140.

Other than that, it has the same effect as that of the first embodiment.

The bosses 50 and 60 of the duct member 140 shown in FIG. 8 are exemplary, and the shapes, numbers, and dimensions of the bosses 50 and 60 can be appropriately changed as needed.

(Embodiment 3)
As shown in FIG. 9, the floor duct structure 201 of the third embodiment has a different structure of the duct member 240 from that of the floor duct structure 1 of the first embodiment.

In this duct member 240, the back surface 41d of the bottom plate portion 41a of the ventilation portion 41 is joined to the outer surface 20a of the silencer member 20, and the tip surfaces of the two standing wall portions 41b erected from the bottom plate portion 41a are floor carpets. It is configured to be joined to the back surface of 30. Therefore, the ventilation portion 41 has a cross-sectional shape in which the floor carpet 30 side is open and the ventilation portion 41 is convex toward the floor panel 10 side. The ventilation portion 41 is configured to form a ventilation passage 42 between the surface 41c of the bottom plate portion 41a facing the floor carpet 30 and the floor carpet 30.

Other configurations are the same as those in the first embodiment.

According to the floor duct structure 201 of the third embodiment described above, the outer surface 20a of the silencer member 20 and the back surface 41d of the bottom plate portion 41a of the ventilation portion 41 are directly joined, and the silencer member 20 and the duct member 240 are assembled in advance. Can be transformed into.

Other than that, it has the same effect as that of the first embodiment.

In the modification particularly related to the above-described third embodiment, the characteristic portion of the duct member 140 of the second embodiment can be applied to the duct member 240. That is, a portion such as the bosses 50 and 60 shown in FIG. 8 can be provided on the surface 41c of the bottom plate portion 41a of the ventilation portion 41 of the duct member 240. As a result, the rigidity of the duct member 240 itself can be increased.

The present invention is not limited to the above-mentioned typical embodiments, and various applications and modifications can be considered as long as the object of the present invention is not deviated. For example, the following embodiments to which the above-described embodiments are applied can also be implemented.

In the above-described embodiment, the case where the duct members 40, 140, 240 are assembled on both sides of the tunnel portion 12 of the floor panel 10 in the vehicle width direction Y has been illustrated, but instead of this, the tunnel portion 12 in the vehicle width direction Y has been illustrated. The duct members 40, 140, 240 may be assembled on only one side of the tunnel portion 12 or above the tunnel portion 12.

In the above-described embodiment, the case where the cross-sectional shape of the duct members 40, 140, 240 is substantially U-shaped so as to open on one side has been illustrated, but instead, the cross-section of the ventilation portion 41 is illustrated. It is also possible to adopt a configuration in which the shape is substantially square.

In the above-described embodiment, the case where the ribs 43b and 44b extend along the cross section including the vehicle width direction Y and the vehicle height direction Z in the two reinforcing portions 43 and 44 of the duct members 40, 140 and 240 is exemplified. However, instead of or in addition to such ribs 43b and 44b, ribs extending along the vehicle length direction X can be adopted. Further, the ribs 43b and 44b may be omitted from the two reinforcing portions 43 and 44, and the shapes of the support plate portions 43a and 44a and the shape of the ventilation portion 41 itself may be changed so as to fill the gaps Sa and Sb. .. That is, means other than ribs can be used to fill the gaps Sa and Sb.

In the above-described embodiment, the case where the duct members 40, 140, 240 are provided with the two reinforcing portions 43, 44 has been illustrated, but instead, one of the two reinforcing portions 43, 44 is omitted. Can also be adopted.

1,101,201 Vehicle floor duct structure (floor duct structure)
2 Vehicle interior 10 Floor panel 12 Tunnel part 20 Silencer member 20a Outer surface 21 Recessed part 30 Floor carpet 40, 140, 240 Duct member 41 Ventilation part
41a Bottom plate 41b Standing wall 41c Surface 42 Ventilation 43,44 Reinforcement 43a, 44a Support plate 43b, 44b Rib Sa, Sb Gap X Vehicle length direction Y Vehicle width direction Z Vehicle height direction

Claims (5)

A floor panel with a tunnel that protrudes toward the passenger compartment and extends in the direction of the vehicle length,
The silencer member laid on the floor panel and
The floor carpet laid on the silencer member and
A duct member interposed between the silencer member and the floor carpet along the tunnel portion,
With
The silencer member is provided with a recess whose outer surface is recessed inward according to the shape of the duct member.
The duct member is a vehicle floor duct structure having a ventilation portion having a ventilation passage and a reinforcing portion provided in the ventilation portion so as to fill a gap between the recess of the silencer member. The ventilation portion includes a bottom plate portion joined to the first member to be joined, which is one of the floor carpet and the silencer member, and the floor carpet and the silencer member, whichever is erected from the bottom plate portion. It has two standing wall portions to be joined to the second member to be joined, and is formed by the bottom plate portion and the two standing wall portions in a cross section including the vehicle width direction and the vehicle height direction. The floor duct structure for a vehicle according to claim 1, wherein the cross-sectional shape thereof is substantially U-shaped, and the ventilation path is formed between the two members to be joined. The vehicle floor duct structure according to claim 2, wherein the ventilation portion is configured such that the surface of the bottom plate portion facing the floor carpet is joined to the floor carpet. The reinforcing portion has a support plate portion extending along the outer surface of the silencer member from at least one of the two standing wall portions, and a rib extending from the support plate portion along the cross section. The vehicle floor duct structure according to claim 2 or 3. The floor duct structure according to any one of claims 1 to 4, wherein the duct member is provided on both sides of the tunnel portion of the floor panel in the vehicle width direction.

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