JP2019182183A - Vehicle floor structure - Google Patents

Abstract

To provide a vehicle floor structure capable of improving sound insulation property and thermal insulation property without impairing stepping feeling.SOLUTION: A vehicle floor structure includes: mat members 12a, 12b laid on a floor panel 2 of a vehicle 1; and an indoor component 31 attached to the floor panel 2 from an indoor side. Air layers 13a, 13b are formed between the floor panel 2 and the mat members 12a, 12b. When the mat members 12a, 12b are partitioned to a first region A1 located below the indoor component 31, and a second region A2 that is a region other than the first region A1, the air layers 13a, 13b are configured so that the occupancy per unit area in the mat members 12a, 12b is lower in the second region A2 than in the first region A1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle floor structure.

  Conventionally, the thing of patent document 1 is known as a floor structure for vehicles. In the vehicle floor structure described in Patent Document 1, in a vehicle soundproof structure in which a soundproofing material is attached to the interior side of a vehicle body panel, the soundproofing material is a dense porous molded according to the shape of the interior surface of the vehicle body panel. It is composed of a single layer of sound absorber, and is attached to the interior surface of the vehicle body panel through an air layer with a predetermined clearance between the sound absorber and the density and thickness of the dense porous sound absorber and the thickness of the air layer. It is disclosed to adjust according to the frequency level of the noise propagating from the panel to the indoor side. With such a configuration, the product weight can be reduced, so that the fuel efficiency can be improved and the mounting workability to the vehicle body panel can be improved. In addition to being able to demonstrate good sound insulation properties, it is also described that it can absorb sound from the dense porous sound absorber again to the reflected noise reflected from the indoor side, and is excellent in sound absorption properties. Yes.

JP 2005-112088 A

  By the way, for example, on a vehicle floor panel, it is desired to provide a vehicle floor structure having heat insulation in addition to soundproofing. However, the vehicle floor structure provided in such a place has a portion that requires an appropriate rigidity in order to ensure the comfort of the passenger.

  The present invention has been completed based on the above circumstances, and one of the objects thereof is to provide a vehicle floor structure that can improve soundproofing and heat insulation properties without impairing treading comfort. To do.

  The present invention includes a mat member laid on a floor panel of a vehicle, and an indoor part attached to the floor panel from the indoor side. An air layer is formed between the floor panel and the mat member, and the mat When the member is divided into a first region located below the indoor part and a second region which is a region other than the first region, the air layer has a first occupation ratio per unit area in the mat member. It is characterized in that the second region is lower than the region.

  According to such a floor structure for a vehicle, air per unit area in the mat member at a place where the occupant tends to apply pressure by stepping on the mat member (second area) and a place where the pressure is not so (first area). The occupancy of the layer will change. And the occupation rate is lower in the second region than in the first region. Therefore, in the mat member, in the first region where the stepping comfort is unnecessary, it is possible to ensure soundproofing and heat insulation by a sufficient air layer, while maintaining rigidity in the second region to ensure the stepping comfort. A vehicle floor structure can be provided.

  In the above configuration, the air layer formed in the second region may have a honeycomb structure in a plan view. According to such a vehicle floor structure, an air layer formed in a limited space between the floor panel and the mat member can be efficiently obtained, and the rigidity of the mat member in the second region can be increased. In other words, in the second region, it is possible to provide a vehicle floor structure capable of obtaining both soundproofing and heat insulating properties and treading comfort.

  The said structure WHEREIN: The said air layer can be formed over the whole region of the said 1st area | region. According to such a vehicle floor structure, sound and heat can be shielded over the entire first area where the mat member does not require a feeling of stepping. Therefore, in the mat member, it is possible to provide a vehicle floor structure capable of improving soundproofing and heat insulating properties in the first region while maintaining a comfortable feeling in the second region.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the floor structure for vehicles which can improve soundproofing and heat insulation, without impairing stepping comfort.

The figure which looked at the room of the vehicle concerning Embodiment 1 from the upper part Cross section of front seat and vehicle floor structure (cross section taken along line II-II in FIG. 1) Sectional view of the vehicle floor structure (cross-sectional view taken along line III-III in FIG. 2) Sectional view of the vehicle floor structure according to Embodiment 2 (corresponding to FIG. 3)

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. In the following description, the arrow direction L is left, the arrow direction R is right, the arrow direction FR is forward, the arrow direction RR is backward, the arrow direction T is upward, and the arrow direction B is downward.

  As shown in FIG. 1, a vehicle (vehicle) 1 includes a front seat 30 disposed in front of a passenger compartment and serving as a driver seat and a passenger seat, a rear seat 40 disposed rearward of the passenger compartment, and an instrument panel 5 having instruments. Etc. Under the floor of the vehicle 1, as shown in FIGS. 2 and 3, a floor panel 2 having a rectangular shape in plan view extending in the front-rear direction and the left-right direction (vehicle width direction) of the vehicle 1 is formed. In the present embodiment, the floor panel 2 and the front seat 30 constitute a vehicle floor structure 10.

  The front seat 30 includes a seat cushion (indoor part) 31 on which an occupant sits, and a seat back 34 that serves as a backrest when seated. Below the seat cushion 31, a slide device 32 for sliding the front seat 30 in the vehicle front-rear direction and a pair of attachment members 33, 33 for attaching the front seat 30 to the floor panel 2 are arranged. .

  The floor panel 2 bulges toward the vehicle interior side and extends in the vehicle width direction. The floor panel 2 bulges toward the vehicle interior side and the pair of attached portions 20 and 20 having a rectangular shape in plan view to which the pair of attachment members 33 and 33 are attached. And side end portions 21, 21 extending in the vehicle front-rear direction and connected to the left and right ends of the mounted portions 20, 20. The mounted portions 20 and 20 and the side end portions 21 and 21 are arranged so as to be orthogonal to each other.

  The pair of attachment members 33 and 33 are disposed below the seat cushion 31 and at positions corresponding to the front end portion and the rear end portion of the seat cushion 31, respectively. Similarly, the pair of attached portions 20 and 20 are disposed below the seat cushion 31 and at positions corresponding to the front end portion and the rear end portion of the seat cushion 31, respectively. The seat cushion 31 is attached to the floor panel 2 from the vehicle interior side through the attachment members 33 and 33 and the attached portions 20 and 20.

  Further, as shown in FIGS. 1 to 3, the vehicle floor structure 10 is laid on the floor panel 2 and is partitioned by mated parts 20 and 20 and side end parts 21 and 21 (first member). A mat member 12 a and a second mat member 12 b), and a carpet 11 bonded to the upper surface of the mat member 12. As shown in FIGS. 2 and 3, the carpet 11 extends so as to cover portions other than the upper surface of the mat member 12, for example, the upper surfaces of the attached portions 20 and 20 and the upper surfaces of the side end portions 21 and 21. .

  The mat member 12 includes a first mat member 12a having a square shape and a plate shape in plan view disposed inside the pair of mounted portions 20 and 20, and a plate shape disposed outside the pair of mounted portions 20 and 20. The second mat member 12b. That is, it can be said that the mat member 12 is partitioned into a first region A1 located below the seat cushion 31 and a second region A2 that is a region other than the first region A1. In the mat member 12, a section below the seat cushion constituting the rear seat 40 is also defined as the first region A1.

  As the material of the mat members 12a and 12b, a fiber material such as a woven fabric or a non-woven fabric, a foamed material of a urethane material, or the like can be used. Therefore, the mat members 12a and 12b have enough elasticity to provide comfortable occupant comfort to the occupant.

  Air layers 13a and 13b are formed between the floor panel 2 and the mat members 12a and 12b. Specifically, in the space between the floor panel 2 and the first mat member 12a, a first air layer 13a that extends over the entire first region A1, that is, communicates with the first region A1, is formed. A plurality of second air layers 13b are formed in the space between the floor panel 2 and the second mat member 12b.

  In order to effectively obtain soundproofing and heat insulation properties, the height (thickness) of the air layers 13a and 13b in the direction from the floor panel 2 toward the vehicle interior is preferably 7 mm or less. In the present embodiment, the height of the air layers 13a and 13b is set to a constant height in the vehicle front-rear direction and the left-right direction.

  The first air layer 13a is formed over the entire first region A1. That is, when viewed in plan, the first air layer 13a has a rectangular shape that is the same as the shape of the first mat member 12a, and overlaps the first mat member 12a. By the way, the first mat member 12a is held on its position by being adhered to the carpet 11 with an adhesive force that does not peel off from the carpet 11, or supported by a support body (not shown). Therefore, the first air layer 13a is not crushed by the first mat member 12a and maintains the space.

  One second air layer 13b has a trapezoidal shape that is recessed from the floor panel 2 to the vehicle interior side in the cross-sectional view shown in FIG. 2, and has a regular hexagonal shape in the plan view shown in FIG. The plurality of second air layers 13b are arranged alternately at equal intervals in the vehicle front-rear direction, and are alternately arranged in the left-right direction to form a planar view honeycomb structure.

  By the way, as shown in FIG.2 and FIG.3, the 2nd mat member 12b comprises the side wall of the 2nd air layer 13b, supporting the 2nd mat member 12b by extending on the floor panel 2, and contacting. A support wall 14 is provided. Accordingly, one second air layer 13b is formed by surrounding the periphery of the second air layer 13b with the support wall portion 14 in a regular hexagonal shape in plan view. In other words, since the support wall portion 14 around one second air layer 13b has a regular hexagonal shape in plan view, the support wall portion 14 as a whole forms a planar view honeycomb structure.

  Here, in FIG. 3 which is a cross-sectional view of the vehicle floor structure 10 in the middle of the height of the air layers 13a and 13b, the units in the mat members 12a and 12b are respectively provided for the first region A1 and the second region A2. The occupation ratio of the air layers 13a and 13b per area is expressed as a percentage as follows. In the first region A1, since the first air layer 13a is formed over the entire region, the occupation ratio is 100%. On the other hand, in the second region A2, since the support wall portion 14 of the second mat member 12b exists between one second air layer 13b and the adjacent second air layer 13b, the occupation ratio is 100. % (For example, about 80%). That is, the air layers 13a and 13b are configured such that the occupation ratio per unit area in the mat members 12a and 12b is lower in the second region A2 than in the first region A1.

  As shown in FIG. 2, since the heights of the air layers 13a and 13b are constant, the air layers 13a and 13b have a second occupation ratio per unit volume in the mat members 12a and 12b as compared with the second region A1. The region A2 has a lower configuration.

  Then, the effect of this embodiment is demonstrated. In this embodiment, it has mat members 12a and 12b laid on the floor panel 2 of the vehicle 1, and an indoor part 31 attached to the floor panel 2 from the indoor side. The floor panel 2 and the mat members 12a and 12b In between, air layers 13a and 13b are formed, and the mat members 12a and 12b are divided into a first region A1 located below the indoor part 31 and a second region A2 that is a region other than the first region A1. When partitioned, the air layers 13a and 13b are characterized in that the occupation ratio per unit area in the mat members 12a and 12b is lower in the second region A2 than in the first region A1.

  According to the vehicle floor structure 10 as described above, the mat member is divided into a place where the occupant is likely to apply pressure by stepping on the mat members 12a and 12b (second area A2) and a place where the pressure is not so (first area A1). The occupation ratio of the air layers 13a and 13b per unit area in 12a and 12b will change. The occupation ratio is lower in the second area A2 than in the first area A1. Accordingly, in the mat member 12a, 12b, in the first region A1 where the stepping comfort is not required, soundproofing and heat insulating properties are ensured by the sufficient first air layer 13a, while in the second region A2, the step is performed while maintaining rigidity. A vehicle floor structure 10 that can ensure comfort can be provided.

  In the present embodiment, the second air layer 13b formed in the second region A2 may have a honeycomb structure in plan view. According to such a vehicle floor structure 10, the second air layer 13b formed in a limited space between the floor panel 2 and the second mat member 12b can be efficiently obtained. Further, the support wall portion 14 around one second air layer 13b forms a regular hexagonal shape in plan view, and the support wall portion 14 as a whole forms a honeycomb structure in plan view. The rigidity of the two mat members 12b can be increased. That is, it is possible to provide the vehicle floor structure 10 capable of obtaining both soundproofing and heat insulating properties and treading comfort in the second region A2.

  Moreover, in this embodiment, the 1st air layer 13a can be formed over the whole region of 1st area | region A1. According to such a vehicle floor structure 10, sound and heat can be shielded in the entire first area A <b> 1 where the mat members 12 a and 12 b do not require stepping comfort. Therefore, in the mat member 12, it is possible to provide the vehicle floor structure 10 that can improve the soundproofing property and the heat insulating property in the first region A <b> 1 while maintaining the stepping comfort in the second region A <b> 2.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, a vehicle floor structure in which the configurations of the second air layer and the support wall portion are different from those of the first embodiment is illustrated. In the present embodiment, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and redundant description of the structure and effect is omitted.

  One second air layer 213b is formed by surrounding the periphery thereof in a square shape in plan view by the support wall portion 214. Each of the plurality of second air layers 213b is arranged side by side at equal intervals in the vehicle front-rear direction and the left-right direction. Therefore, the support wall 214 as a whole has a lattice shape in plan view.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In addition to the above embodiment, the indoor parts can be changed as appropriate. In the above embodiment, the indoor part is the seat cushion 31 of the front seat 30, but is not limited thereto. For example, the indoor part may be a seat cushion of the rear seat 40.

  (2) Besides the above embodiment, the shape of the first air layer can be changed as appropriate. In the said embodiment, although the shape of the 1st air layer was made into one air layer which is square shape planar communication and communicates, it is not restricted to this. For example, when the first mat member has a support wall portion, the first air layer may have a shape divided by the support wall portion.

  (3) In addition to the above embodiment, the shape of one second air layer can be changed as appropriate. In the above embodiment, the shape of one second air layer is a regular hexagonal shape or a regular square shape in plan view, but is not limited thereto. For example, the shape of one second air layer may be a circular shape in plan view or a triangular shape in plan view.

  (4) In addition to the above embodiment, the height of the air layer can be changed as appropriate. In the said embodiment, although the height of the air layer was set as the fixed height over the vehicle front-back direction and the left-right direction, it is not restricted to this. For example, the structure set so that the height of a 2nd air layer may become lower than the height of a 1st air layer may be sufficient.

  (5) The vehicle floor structure exemplified in the above embodiments is not limited to that provided for vehicles, and may be provided in various vehicles. For example, the vehicle floor structure can be applied to vehicles such as trains and play vehicles as ground vehicles, airplanes and helicopters as flying vehicles, and ships and submersibles as marine and underwater vehicles.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle (vehicle), 2 ... Floor panel, 10 ... Floor structure for vehicles, 11 ... Carpet, 12a, 12b ... Mat member, 13a, 13b ... Air layer, 14, 214 ... Support wall part, 20, 20 ... Cover Attachment part, 21, 21 ... Side edge part, 30 ... Front seat, 31 ... Seat cushion (indoor part), 32 ... Slide device, 33, 33 ... Attachment member, A1 ... First area, A2 ... Second area

Claims (3)

A mat member laid on the floor panel of the vehicle;
An indoor part attached to the floor panel from the indoor side,
An air layer is formed between the floor panel and the mat member,
When the mat member is partitioned into a first region located below the indoor part and a second region that is a region other than the first region, the air layer is per unit area of the mat member. The vehicle floor structure characterized in that the occupation ratio is lower in the second area than in the first area.   The vehicle floor structure according to claim 1, wherein the air layer formed in the second region has a honeycomb structure in a plan view.   3. The vehicle floor structure according to claim 1, wherein the air layer is formed over an entire area of the first region.

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