JP2017165174A - Vehicle panel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle panel structure that achieves both ensured rigidity and vibration attenuation performance.SOLUTION: A vehicle panel structure (1) has a plurality of panel members (2a, 2b) of synthetic resin, which are connected by a connection member (8) so as to be parallel to each other via a spaced separating part. Each panel member (2a, 2b) comprises: at least one fiber dense part (7a, 7b) arranged within a synthetic resin base material at a predetermined first fiber arrangement density in a straight form of predetermined width such that the reinforced fibers are straight continuous all the way from one end to the other end of the panel member (2a, 2b); and fiber coarse parts (6a to 6d) arranged within the synthetic resin base material at a second fiber arrangement density lower than the first fiber arrangement density, such that the reinforced fibers are straight continuous all the way from one end to the other end of the panel member in a plurality of directions in an area other than at least the fiber dense parts (7a, 7b).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle panel structure made of fiber reinforced synthetic resin capable of forming a vehicle floor panel and the like, and more particularly to a vehicle panel structure capable of ensuring both rigidity and vibration damping performance.

  Conventionally, a fiber reinforced synthetic resin (FRP) in which a synthetic fiber is embedded as a reinforcing fiber in a synthetic resin base material to increase strength and rigidity has been widely used as a material having light weight, high strength and high rigidity. . In recent years, carbon fiber reinforced synthetic resin (CFRP) using carbon fibers as reinforcing fibers has attracted attention. CFRP is stronger and more rigid than steel of the same weight, but it is difficult and expensive to process and mass-produce, so it is used in a limited range as a material for aircraft and vehicles with limited production. ing.

  On the other hand, in recent years, fuel efficiency reduction of automobiles has progressed. For reducing fuel consumption, reducing the weight of a vehicle is an effective means. By using a metal member that has been reduced in weight, the weight is reduced while maintaining strength and rigidity. For example, the weight is reduced by using high-tensile steel to thin the member or adopting an aluminum alloy member.

  In order to further reduce the weight, it has been studied to employ high-strength FRP as a panel member such as a floor panel. In an ordinary FRP panel, reinforcing fibers are uniformly arranged in a plurality of directions within the panel surface so as to ensure rigidity in any direction. In order to ensure rigidity in a specific direction, as in Patent Document 1, reinforcing fibers may be arranged in a direction of ± 45 ° with respect to the reference direction uniformly within the panel surface.

WO2013191093A1

  Conventionally, panel members such as a floor panel and a roof panel of a vehicle are likely to vibrate due to input from tires and suspensions due to road surface unevenness or the like. In particular, the vibration of the floor panel that forms the bottom surface of the passenger compartment is easily transmitted to the occupant, giving the passenger an unpleasant feeling. Therefore, when adopting FRP as a floor panel to reduce the weight of the vehicle, it is easy to increase the rigidity and strength, but if the rigidity is increased too much, the vibration damping performance cannot be secured, and the vibration damping performance is reduced. If the rigidity is lowered so that it can be ensured, it becomes difficult to ensure the rigidity. Thus, it is not easy to achieve both rigidity ensuring and vibration damping performance.

  An object of the present invention is to provide a vehicle panel structure capable of ensuring both rigidity and vibration damping performance.

  A vehicle panel structure according to a first aspect of the present invention includes a plurality of panel members made of synthetic resin connected by a connecting member so as to face each other in parallel with a spacing portion having a predetermined interval, and each panel member is reinforced At least one fiber densely arranged in the synthetic resin base material with a predetermined first fiber arrangement density in a straight line having a predetermined width so that the fibers are linearly continuous from end to end of the panel member. The second fiber arrangement is smaller than the first fiber arrangement density so that the reinforcing fibers are linearly continuous in a plurality of directions from one end to the other end of the panel member in a region other than at least the fiber dense portion. And a coarse fiber portion arranged in the synthetic resin base material with a density.

With this configuration, the fiber dense part is formed in a part of the panel member and the fiber coarse part is formed in the remaining part of the panel member, thereby ensuring appropriate rigidity and strength mainly through the fiber dense part. However, moderate vibration damping performance can be ensured mainly through the coarse fiber portion.
In addition, since the plurality of panel members are opposed to each other in parallel through the separation portion and are connected by the connecting member, the sectional moment of the panel member can be increased as compared with the case of a single panel member. This is advantageous in increasing (panel rigidity), and torsional deformation of the panel member in the rotational direction centering on the dense fiber portion is allowed, so vibration damping performance can be ensured.

The vehicle panel structure of the second invention has a plurality of panel members made of synthetic resin connected by connecting members so as to face each other in parallel through a spacing portion of a predetermined interval, and each panel member is reinforced A panel body constituting a coarse fiber portion arranged in a synthetic resin base material at a predetermined third fiber arrangement density so that fibers are linearly continuous in a plurality of directions from one end to the other end of the panel member. And
At least one belt-like member formed separately from the panel body, and having a predetermined width greater than the third fiber arrangement density so that the reinforcing fibers are linearly continuous over the entire length. And at least one belt-like member constituting a dense fiber portion arranged in the synthetic resin base material with a four-fiber arrangement density, wherein the belt-like member is fixed to the panel main body portion.

  With this configuration, the panel member has a panel body portion constituting the fiber coarse portion and at least one belt-like member constituting the fiber dense portion, so that appropriate rigidity and strength are mainly secured through the fiber dense portion. However, moderate vibration damping performance can be secured mainly through the coarse fiber portion.

  In addition, since the plurality of panel members are opposed to each other in parallel through the separation portion and are connected by the connecting member, the sectional moment of the panel member can be increased as compared with the case of a single panel member. This is advantageous in increasing (panel rigidity), and torsional deformation of the panel member in the rotational direction centering on the dense fiber portion is allowed, so vibration damping performance can be ensured. Moreover, since the strip | belt-shaped member which comprises a fiber dense part is formed in the different body from the panel main-body part, formation of a panel member is easy.

According to a third aspect of the present invention, there is provided the vehicle panel structure according to the first or second aspect, wherein the panel member is formed in a rectangular shape, and the fiber dense portions intersect along a pair of diagonal lines of the panel member. It is characterized by being provided.
With this configuration, the vehicle panel structure forms a high-strength fiber dense portion in a pair of diagonal directions of the panel member, so that the bending rigidity in the direction in which the diagonal line is bent is increased to ensure the bending rigidity of the entire panel member. The strength against in-plane shear deformation of the panel member can be ensured.

According to a fourth aspect of the present invention, there is provided the vehicle panel structure according to any one of the first to third aspects, wherein the connecting member is a spacer member disposed in the separation portion, and the spacer member is more rigid than the panel member. Is characterized by low.
With this configuration, the spacer member does not hinder torsional deformation of each panel member, and each panel member can absorb vibration energy, so that the vibration damping performance of the vehicle panel structure can be ensured.

The vehicle panel structure according to a fifth aspect of the present invention is the vehicle panel structure according to the fourth aspect, wherein the spacer member is a plate-like spacer member made of synthetic resin that is connected so that opposing portions of the plurality of panel members function integrally. However, it occupies the whole separation part.
With this configuration, since the plurality of opposing panel members function integrally, the sectional moment of inertia of the panel member can be secured and the bending rigidity can be secured.

  According to the vehicle panel structure of the present invention, it is possible to provide a vehicle panel structure capable of ensuring both rigidity and vibration damping performance.

It is a perspective view which shows the panel structure for vehicles by which the panel for vehicles was fixed to the lower part of the vehicle body. It is a disassembled perspective view which shows the panel structure for vehicles of 1st invention. It is a principal part expanded sectional view of the III-III line of FIG. It is a disassembled perspective view which shows the panel structure for vehicles of 2nd invention. It is a principal part expanded sectional view of the VV line of FIG.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

As shown in FIG. 1, the floor panel of the vehicle V has, for example, four panel bodies 5a to 5d, and the outer peripheral portions of the panel bodies 5a to 5d are fixed to the panel support portion of the vehicle body.
The vehicle width direction inner ends of these panel bodies 5a to 5d are fixed to the panel support portion 3a of the floor tunnel 20, and the vehicle width direction outer ends of the panel bodies 5a to 5d are fixed to the panel support portion 3b of the side sill 21. Yes. The front end portions of the front panel members 5a and 5b are fixed to the panel support portion 3c of the dash lower panel 22, and the rear end portion is fixed to the panel support portion (not shown) of the cross member 23.

The front end portions of the rear-row panel bodies 5c and 5d are fixed to the panel support portion 3d of the cross member 23, and the rear end portions are fixed to a panel support portion (not shown) of a cross member not shown.
The arrow F direction indicates the front, the arrow L direction indicates the left side, and the arrow U direction indicates the upper side.

As shown in FIG. 2, a vehicle panel structure 1 (hereinafter referred to as a panel structure 1) described below is applicable to the panel bodies 5a to 5d in FIG.
The panel structure 1 is connected by a spacer member 8 (connection member) so that the two panel members 2a and 2b face each other in parallel through a separation portion having a predetermined interval (for example, 10 to 20 mm). The separation portion is a gap between the panel member 2a and the panel member 2b, and a plate-like spacer member 8 having the same size as the panel members 2a and 2b is disposed in the separation portion, and the separation portion is regulated to a predetermined interval. Yes.

  The spacer member 8 is formed of, for example, a synthetic resin foam, and has a lower rigidity than the panel members 2a and 2b. The spacer member 8 secures a predetermined interval between the panel structures 1 and maintains the integrity of the panel members 2a and 2b. The spacer member 8 is bonded to the panel members 2a and 2b.

  The panel members 2a and 2b are made of FRP in which a plurality of reinforcing fibers 4 are embedded in a synthetic resin base material (for example, thermosetting epoxy-based synthetic resin), and each side has a rectangular shape with a length of, for example, 1000 to 1200 mm. For example, the thickness is 2 to 3 mm. As the reinforcing fiber 4, for example, carbon fiber or aramid fiber can be adopted, and the diameter thereof is, for example, 7 to 10 μm.

  The panel member 2a has a plurality of reinforcing fibers 4 that are linearly continuous from end to end, and are embedded in a synthetic resin base material. The reinforcing fiber 4 has a high strength against the tensile force in the direction in which the fiber extends. The synthetic resin base material has viscoelasticity and absorbs vibration energy by allowing deformation of the panel member 2a to attenuate the vibration.

  As shown in FIG. 2, the panel member 2a includes a plurality of reinforcing fibers 4 having a predetermined first fiber arrangement density (for example, the ratio of the reinforcing fibers 4 occupying the unit cross-sectional area is 50 to 60%). And the dense fiber portion 7a and the second fiber arrangement density in which the plurality of reinforcing fibers 4 are smaller than the first fiber arrangement density (for example, the proportion of the reinforcing fibers 4 in the unit cross-sectional area is 10 to 30%). It has the fiber rough parts 6a and 6b contained in the inside.

  In the fiber dense portion 7a, for example, the reinforcing fibers 4 are linearly continuous in the diagonal direction over the entire length of a linear region having a predetermined width (for example, 20 to 30 mm width) including one of a pair of diagonal lines of the panel member 2a. So that the first fiber density is arranged. The fiber dense portion 7a has high tensile strength in the direction in which the reinforcing fibers 4 extend.

  A plurality of reinforcing fibers are formed so that coarse fiber portions 6a and 6b are formed at least in the region other than the fiber dense portion 7a of the panel member 2a, and are linearly continuous from the end to the end of the panel member 2a. 4 are arranged in parallel with the pair of diagonal directions and intersect each other and are arranged at the second fiber arrangement density. In the fiber coarse portions 6a and 6b, the reinforcing fibers 4 may be arranged in the second fiber arrangement density in three or more different directions in a pseudo isotropic manner. The coarse fiber portions 6a and 6b have a higher proportion of the synthetic resin base material than the dense fiber portion 7a, so that they are more easily deformed by external forces such as vibration than the dense fiber portion 7a. Let

  In the panel member 2a, for example, a synthetic resin base material is pressure-injected into a molding die in which a plurality of reinforcing fibers 4 are arranged so as to form the fiber coarse portions 6a and 6b and the fiber dense portion 7a, and temperature and pressure are applied. Molded. It should be noted that a plurality of reinforcing fibers 4 are arranged in a direction along one of a pair of diagonal lines so as to form the fiber coarse portions 6a and 6b and the fiber dense portion 7a, and the fiber coarse portions 6a and 6b are formed. Alternatively, the panel member 2a may be formed by alternately laminating a plurality of layers in which a plurality of reinforcing fibers 4 are arranged in a direction along the other diagonal line.

Since the panel member 2b has the same configuration as the panel member 2a, the description thereof is omitted, but the fiber coarse portions 6c and 6d corresponding to the fiber coarse portions 6a and 6b of the panel member 2a and the fibers corresponding to the fiber dense portions 7a. It has a dense portion 7b. However, the fiber dense portion 7a is parallel to one of the pair of diagonal lines,
The dense fiber portion 7b is parallel to the other of the pair of diagonal lines.

  In the panel structure 1, the fiber dense portions 7 a and 7 b of the panel members 2 a and 2 b are connected with the spacer member 8 interposed therebetween so as to intersect in plan view, and a separation portion having a thickness equal to the thickness of the spacer member 8 is formed. Yes.

  FIG. 3 shows a state in which the panel structure 1 is assembled as the panel body 5c of the floor panel of the vehicle V. The inner end of the panel structure 1 in the vehicle width direction is bonded to the panel support 3a of the floor tunnel 20, for example. The outer end in the vehicle width direction of the panel structure 1 is fixed to the panel support portion 3b of the side sill 21 by, for example, adhesion.

Next, functions and effects of the panel structure 1 will be described.
Since the two panel members 2a and 2b are connected to each other by the spacer member 8 so as to face each other in parallel through the separation portion and are formed to have a large thickness, the single panel member having no separation portion is configured. In comparison, the second moment of section can be increased, which is advantageous in terms of ensuring bending rigidity (panel rigidity).

  In addition, since the plate-like spacer member 8 having the same size as the panel members 2a and 2b is bonded to the panel members 2a and 2b, the panel members 2a and 2b that are vertically opposed to each other are in a state of functioning integrally. Therefore, the cross-sectional secondary moment can be increased. And since the fiber dense parts 7a and 7b are formed in a part of the two panel members 2a and 2b and the fiber coarse parts 6a to 6d are formed in the remaining part, the fiber dense parts 7a and 7b have an appropriate rigidity. While securing, moderate vibration damping performance can be ensured by the fiber coarse portions 6a to 6d. Moreover, since the fiber dense portions 7a and 7b are arranged in parallel with the pair of diagonal lines, the panel structure 1 can be secured against in-plane shear deformation.

  Regarding vibration attenuation, torsional deformation that occurs in the rotational direction around the fiber dense portions 7a and 7b due to vibration is likely to occur in the coarse fiber portions 6a to 6d of the panel members 2a and 2b. As a result, the vibration energy is easily absorbed by the panel members 2a and 2b, so that the vibration damping performance of the panel structure 1 is ensured.

  Since the spacer member 8 has lower rigidity than the panel members 2a and 2b, it does not hinder torsional deformation of the panel structure 1 due to vibration. Further, since the opposing panel members 2a and 2b are connected by the spacer member 8, the panel members 2a and 2b function integrally, which is advantageous for ensuring both rigidity and vibration damping performance. Further, since the panel structure 1 is formed by connecting and integrating the two panel members 2a and 2b, the panel structure 1 can be easily attached to the vehicle V.

  As described above, both rigidity ensuring and vibration damping performance can be achieved, and the panel members 2a and 2b can be easily attached to the vehicle body. Further, the specific gravity of the panel members 2a and 2b is about 1.5, and the specific gravity of an existing panel member, for example, a steel plate panel member, is 7.85, so that the weight can be reduced. Furthermore, since the fiber dense portions 7a and 7b are formed so as to intersect along a pair of diagonal lines of the vehicle panel structure 1 in a plan view, the total amount of the reinforcing fibers 4 used in the panel members 2a and 2b is reduced. This can reduce the material cost.

  Next, a vehicle panel structure 11 (hereinafter referred to as a panel structure 11) according to the second embodiment will be described with reference to FIGS.

  As shown in FIGS. 4 and 5, the vehicle panel structure 11 includes a spacer member 18 a, so that two panel members 12 a, 12 b face each other in parallel with a predetermined interval (for example, 10 to 20 mm) apart. 18b are connected. The separation portion is a gap between the panel member 12a and the panel member 12b, and spacer members 18a and 18b are arranged in the separation portion to form a separation portion having a predetermined interval.

  The panel member 12a includes a rectangular panel body 13a and a belt-like member 15a that extends along one of a pair of diagonal lines of the panel body 13a and is fixed to the lower surface of the panel body 13a. The panel main body portion 13a constitutes a fiber coarse portion, and the belt-like member 15a constitutes a fiber dense portion.

  The panel main body 13a is made of FRP in which a plurality of reinforcing fibers 14 are embedded in a synthetic resin base material (for example, thermosetting epoxy-based synthetic resin), and has a rectangular shape with one side of 1000 to 1200 mm, for example, with a thickness of 2 for example. It is formed to ˜3 mm. As the reinforcing fiber 14, for example, carbon fiber or aramid fiber can be employed, and the diameter thereof is, for example, 7 to 10 μm.

  The panel main body 13a has a plurality of linearly continuous reinforcing fibers 14 arranged from one end to the other, and these are embedded in a synthetic resin base material. The directions in which the reinforcing fibers 14 extend are two directions parallel to the pair of diagonal lines of the rectangular panel body 13a, but may be a plurality of directions of three or more in a pseudo isotropic manner. The panel main body 13a constitutes a coarse fiber portion in which the plurality of reinforcing fibers 14 are included at a predetermined third fiber arrangement density (for example, the proportion of the reinforcing fibers 14 in the unit cross-sectional area is 10 to 30%).

  The band-shaped member 15a is made of FRP in which a plurality of reinforcing fibers 14 are embedded in a synthetic resin base material (for example, thermosetting epoxy-based synthetic resin) in parallel with one diagonal line, and the width is, for example, 20 to 30 mm, and the thickness is, for example, 2 Both ends are formed so as to match the shape of the corners of the panel body 13a with a length of ˜3 mm and the same length as the diagonal of the panel body 13a. As the reinforcing fiber 14, for example, carbon fiber or aramid fiber can be adopted, and the diameter thereof is, for example, 7 to 10 μm.

  The belt-like member 15a has a plurality of reinforcing fibers 14 extending in parallel so as to be continuous in a straight line parallel to one diagonal line over the entire length thereof, and these are embedded in a synthetic resin base material. The band-shaped member 15a constitutes a dense fiber portion in which the reinforcing fibers 14 are included at a fourth fiber arrangement density (for example, the proportion of the reinforcing fibers 14 in the unit cross-sectional area is 50 to 60%) greater than the third fiber arrangement density. .

  Since the panel member 12b has the same configuration as the panel member 12a, the description thereof will be omitted, but the panel member 12b has a panel body portion 13b corresponding to the panel body portion 13a of the panel member 12a and a strip shape corresponding to the strip member 15a. It has the member 15b.

  The spacer members 18a and 18b are formed of, for example, a synthetic resin foam and have lower rigidity than the panel members 12a and 12b. The spacer member 18a has a predetermined width (for example, 10 to 100 mm) and is arranged in a frame shape along the peripheral edges of the panel members 12a and 12b. The spacer member 18b is formed to have the same thickness as the spacer member 18a, and is arranged in an X shape along a pair of diagonal lines of the panel structure 11, for example.

  The spacer members 18a and 18b are joined to the panel body portions 13a and 13b by adhesion. Of the spacer members 18a and 18b, portions overlapping with the belt-like members 15a and 15b are formed thin by the thickness of the belt-like members 15a and 15b. In addition, since it arrange | positions so that strip | belt-shaped member 15a, 15b may be located in a separation part, the upper surface and lower surface of the panel structure 11 for vehicles can be made flat.

Next, the operation and effect of the panel structure 11 described above will be described.
The band-like members 15a and 15b have excellent tensile strength, and the panel members 12a and 12b are vertically arranged with a space therebetween, and the panel members 12a and 12b are formed by the spacer members 18a and 18b. Since they are integrally connected, the bending moment (panel rigidity) of the panel structure 11 can be ensured by increasing the sectional secondary moment. Further, since the belt-like members 15a and 15b are arranged in an X shape along a pair of diagonal lines, rigidity against in-plane shear deformation can be ensured.

  Further, the panel main body portions 13a and 13b constitute a coarse fiber portion in which the ratio of the synthetic resin base material is larger than that of the fiber dense portion. Absorbs and damps vibration. Therefore, the twisting deformation of the panel members 12a and 12b, which are the coarse fiber portions, easily occurs against the torsional deformation in the rotational direction around the center of the belt-like members 15a and 15b (fiber dense portions). Since the members 12a and 12b are easily absorbed, the vibration damping performance of the panel structure 11 is ensured.

Since the spacer members 18a and 18b have lower rigidity than the panel members 12a and 12b, the torsional deformation of the panel structure 11 due to vibration is not hindered. Further, since the panel members 12a and 12b are connected by the spacer members 18a and 18b, the panel members 12a and 12b function integrally, which is advantageous in ensuring both rigidity and vibration damping performance.
Moreover, since the vehicle panel structure 11 is integrated by connecting the two panels 12a and 12b, it is easy to attach to the vehicle body.

  As described above, it is possible to achieve both rigidity securing and vibration damping performance, and the strip-like members 15a and 15b which are fiber dense portions formed separately from the panel main body portions 13a and 13b which are coarse fiber portions. Are fixed to form the panel members 12a and 12b, so that the panel members 12a and 12b can be easily manufactured.

  Furthermore, the specific gravity of the panel members 12a and 12b is about 1.5, and the weight of the existing panel member, for example, a steel plate panel member, can be reduced because the specific gravity is 7.85. In addition, the band-like members 15a and 15b which are fiber dense portions along a pair of diagonal lines necessary for securing the rigidity of the panel members 12a and 12b are provided on the panel body portions 13a and 13b corresponding to the fiber coarse portions in a plan view. Since they are fixed so as to intersect, the total amount of the reinforcing fibers 14 used in the panel members 12a and 12b can be reduced, and the material cost can be reduced.

Next, an example in which the above embodiment is partially changed will be described.
1) The panel members 2a and 2b and the panel members 12a and 12b of the first and second embodiments are parallel to each other with a predetermined interval between them by fixing the four sides of each panel member to the panel support portion of the vehicle body. It is good also as a structure connected so that it may oppose. In this case, the vehicle body and the panel support portion correspond to a connecting member, a spacer member may be provided in the separation portion, and a configuration in which there is no spacer member in the separation portion may be adopted.

2) Instead of the spacer members of the first and second embodiments, a plurality of small spacer members may be provided in a matrix at predetermined intervals and bonded to the panel members on both sides by adhesion.
3) In the first and second embodiments, the panel structure including two panel members has been described as an example. However, the same applies to the panel structure including three or more panel members. Can be applied.

4) In Example 1, an X-shaped dense fiber portion along the diagonal may be formed on the panel member 2a, and an X-shaped dense fiber portion along the diagonal may be formed on the panel member 2b. Alternatively, the X-shaped dense fiber portion may be formed only on one of the panel members 2a and 2b.

5) In Example 2, the panel body 13a is provided with an X-shaped dense fiber portion (band-like member) along the diagonal line, and the panel body 13b is provided with an X-shaped fiber dense portion (band-like member) along the diagonal line. May be. However, an X-shaped dense fiber portion (strip-shaped member) along the diagonal line may be provided on only one of the panel main body portions 13a and 13b.

6) In Example 1, fiber dense portions may be formed in a coarse lattice shape in the panel member 2a and / or the panel member 2b.
7) In the second embodiment, the panel body portion 13a and / or the panel body portion 13b may be joined with a band-shaped member formed in a rough lattice shape.

8) The vehicle panel structures 1 and 11 of the present invention are applicable to panel structures other than the vehicle floor panel.
9) In addition, those skilled in the art can implement the present invention in a form in which various modifications are added to the above-described embodiment or in a form in which each embodiment is combined without departing from the spirit of the present invention. It includes various modifications.

DESCRIPTION OF SYMBOLS 1,11 Vehicle panel structure 2a, 2b, 12a, 12b Panel member 3a-3c Panel support part 4,14 Reinforcing fiber 5a-5d Panel body 6a-6d Fiber rough part 7a, 7b Fiber dense part 8, 18a, 18b Spacer Member (connecting member)
13a, 13b Panel body 15a, 15b Strip member

Claims (5)

It has a plurality of panel members made of synthetic resin connected by a connecting member so as to face each other in parallel through a separation portion of a predetermined interval,
Each panel member is
At least one fiber arranged in the synthetic resin base material at a predetermined first fiber arrangement density in a straight line having a predetermined width so that the reinforcing fibers are linearly continuous from end to end of the panel member. Dense part,
The reinforcing fibers are synthesized at a second fiber arrangement density smaller than the first fiber arrangement density so that the reinforcing fibers are linearly continuous in a plurality of directions from one end to the other end of the panel member at least in a region other than the fiber dense portion. A coarse fiber portion disposed in the resin base material;
A vehicle panel structure characterized by comprising: It has a plurality of panel members made of synthetic resin connected by a connecting member so as to face each other in parallel through a separation portion of a predetermined interval,
Each panel member is
A panel constituting a coarse fiber portion arranged in a synthetic resin base material at a predetermined third fiber arrangement density so that reinforcing fibers continue linearly in a plurality of directions from one end to the other end of the panel member. The main body,
At least one belt-like member formed separately from the panel main body, wherein the reinforcing fibers are linearly continuous over the entire length in a straight line having a predetermined width that is larger than the third fiber arrangement density. Comprising at least one band-shaped member constituting a dense fiber portion arranged in a synthetic resin base material at a four-fiber arrangement density;
A vehicle panel structure, wherein the belt-like member is fixed to the panel body.   The vehicle panel according to claim 1 or 2, wherein the panel member is formed in a rectangular shape, and the dense fiber portion is provided so as to intersect along a pair of diagonal lines of the panel member. Construction.   4. The vehicle panel according to claim 1, wherein the connecting member is a spacer member provided in the separation portion, and the rigidity of the spacer member is lower than that of the panel member. 5. Construction.   The spacer member is a synthetic resin plate-like spacer member that is connected so that opposing portions of a plurality of panel members function integrally, and occupies the entire separation portion. 4. The vehicle panel structure according to 4.