JP2005212255A - Frp structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an FRP structure having a proper impact absorbing structure and suitable as an outer panel member for an automobile capable of properly absorbing the impact to a walker at the time of collision especially from a viewpoint of the walker protecting capacity in the outer panel member for the automobile. <P>SOLUTION: In the FRP structure equipped with a tabular structure part formed of an FRP panel, a rib-like ejector plate is provided to the back side of the FRP panel so as to extend in a obliquely erected direction with respect to the back of the FRP panel. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an FRP (fiber reinforced plastic) structure, and more particularly to an FRP structure suitable for use in an automobile outer plate member and the like that can effectively absorb an impact load.

  As an application of the FRP structure, a performance capable of absorbing an impact load more effectively may be required. For example, when an automobile outer plate member is composed of an FRP structure, the automobile outer plate member is required to improve safety in a collision or the like. It is required to improve the pedestrian protection performance in the event of an accident as well as the safety of the passengers when joining. When an automobile collides with a pedestrian, the pedestrian receives impact loads on the legs and head against the front and bonnet of the automobile. It is said that reducing the damage is essential. Therefore, it is required to reduce the damage to the head as much as possible, especially in the case of a car-side part that easily damages the head, particularly the hood, so that the impact force can be absorbed as much as possible even in the event of a collision.

  In order to have such shock absorption performance, the outer plate member for automobiles is appropriately deformed or destroyed, so that the impact on pedestrians is minimized while minimizing damage to internal parts of automobiles and damage to passengers. It is necessary to keep the force application as small as possible. That is, it is necessary to make an appropriate shock absorbing structure from the viewpoint of pedestrian protection.

Various structures have been proposed for FRP automobile panels, but the conventional proposal mainly aims to locally improve the strength and rigidity of necessary parts (for example, Patent Document 1). There are few proposals for an FRP automobile panel having an appropriate structure for absorbing shock as described above.
JP 2003-146252 A

  Therefore, an object of the present invention is to provide an FRP structure provided with an appropriate shock absorbing structure by changing the viewpoint from the conventional technology development orientation, and in particular, from the viewpoint of pedestrian protection performance in an automobile outer plate member, etc. Accordingly, an object of the present invention is to provide an FRP structure suitable as an FRP automobile outer plate member capable of appropriately absorbing and suppressing the impact on a pedestrian during a collision.

  In order to solve the above-described problems, an FRP structure according to the present invention is an FRP structure including a planar structure portion formed by an FRP plate, and is inclined to the back side of the FRP plate. It comprises a rib-shaped protruding plate extending in the direction. Here, the obliquely standing direction indicates a direction in a range not including the normal direction and the tangential direction of the surface on the surface of the FRP plate. In other words, by providing an inclined rib-shaped protruding plate, when an external force such as impact force is applied to the FRP plate, it can be easily deformed in the direction in which the protruding plate lays down along with the deformation of the FRP plate. Thus, the impact energy can be satisfactorily absorbed by the spring effect due to the posture change of the protruding plate and the breakage when exceeding the elastic limit. Also, even if such a protruding plate is provided, the shape of the protruding plate changes only in the sleeping direction when the impact energy as described above is applied. For example, it is possible to reduce damage to pedestrians and damage to internal loads.

  In this FRP structure, a configuration in which a cutout is provided in a part of the protruding plate or a configuration in which a part of the protruding plate is formed in an uneven shape can be adopted. As a result, when the impact energy is applied, the protruding plate is more easily deformed, and it is possible to arbitrarily adjust the breaking load and the deflection stroke of the protruding plate, thereby achieving better impact energy absorption performance.

  Further, a plurality of the protruding plates can be provided. In the case where a plurality of protrusion plates are provided, for example, at least two protrusion plates that are adjacent or opposed to each other may be connected at the tip by a connecting plate.

  Further, the protruding plate can be made of metal or plastic, and the protruding plate can be made of FRP. When the protruding plate is made of FRP, the protruding plate can be structured integrally with the FRP plate. Moreover, when providing the said connection board, a protrusion board and a connection board can also be comprised from FRP, and it can be set as the structure by which this protrusion board and a connection board were comprised integrally.

  The present invention can also be applied to an FRP structure having a sandwich structure or a hollow structure. That is, the FRP structure according to the present invention is an FRP structure in which a planar structure portion is formed in a sandwich structure in which a core material is interposed between two FRP plates, from one FRP plate to the other FRP plate. And a rib-like protruding plate extending in the oblique direction toward the surface. Further, the FRP structure according to the present invention is an FRP structure in which a planar structure portion is formed in a hollow structure in which a space is formed between two FRP plates, from one FRP plate to the other FRP plate. It comprises a rib-like projecting plate extending in the oblique direction.

  Even in such an FRP structure, a configuration in which a notch is provided in a part of the protruding plate, a configuration in which a part of the protruding plate is formed in an uneven shape, and a configuration in which a plurality of protruding plates are provided. can do. Further, the protruding plate is made of FRP and is configured integrally with the one FRP plate, the protruding plate is made of FRP, and is integrated with the other FRP plate, both FRP plates, All of the protruding plates may be made of FRP, and these may be configured integrally.

  The oblique angle of the protruding plate in such an FRP structure may be taken into consideration from the overall rigidity, the hardness of the aforementioned spring effect, the degree of necessary energy absorption, etc. For example, an angle of 10 to 85 degrees with respect to the FRP plate What is necessary is just to set suitably from the range. That is, when impact energy or the like is applied, it is only necessary to be deformed in a sleeping direction without becoming like a stick, so that good impact energy absorption performance is exhibited.

  The FRP structure according to the present invention is suitable for use in, for example, an automobile outer plate member. Among them, it is particularly suitable for use in automobile bonnets. When used for an automobile bonnet, it is effective for protecting the head of a pedestrian in the event of a collision as described above. However, it is needless to say that the present invention is applicable not only to automobile bonnets but also to other automobile outer plate members, and to any application that requires improvement in impact load absorption performance.

  According to the FRP structure of the present invention, when energy such as a collision is input from the outside, the protruding plate is inclined so that it easily deforms such as bending and buckling, and the impact energy is improved. Can absorb. In addition, since the protruding plate is inclined, it deforms in the sleeping direction and does not look like a stick, so that it is possible to minimize damage to the human body and the internal load in the event of a collision. Therefore, if the FRP structure according to the present invention is applied to an automobile outer plate member, it is possible to effectively absorb impact energy at the time of a collision, etc., and to cope with a demand for pedestrian protection at the time of a collision accident in recent years. It becomes possible.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an FRP structure according to an embodiment of the present invention, and shows a case where the present invention is applied to an automobile bonnet as an automobile outer plate member. In FIG. 1, reference numeral 1 denotes an automobile bonnet, and the bonnet 1 is configured as an FRP structure including a planar structure portion formed by an FRP plate 2. A plurality of rib-like protruding plates 3 extending in the oblique direction with respect to the rear surface are provided on the rear surface side of the FRP plate 2. In the present embodiment, each protruding plate 3 is provided such that its tip end comes into contact with the internal load 4. The oblique angle of each protruding plate 3 is preferably set to an angle of 10 to 85 degrees with respect to the FRP plate 2, for example.

  The protruding plate 3 can be formed of metal and fastened to the back surface of the FRP plate 2 of the bonnet 1 or bonded by adhesion. Further, the protruding plate 3 can be formed of resin or FRP. In this case, the protruding plate 3 can be integrally formed with the FRP plate 2 of the bonnet 1.

  FRP in the present invention refers to a resin reinforced with reinforcing fibers, and examples of reinforcing fibers include reinforcing fibers made of inorganic fibers such as carbon fibers and glass fibers, and organic fibers such as Kevlar fibers, polyethylene fibers, and polyamide fibers. Fiber. Carbon fiber is particularly preferable from the viewpoint of easy control of surface rigidity and the like. Examples of the FRP matrix resin include thermosetting resins such as epoxy resins, unsaturated polyester resins, vinyl ester resins, and phenol resins, and polyamide resins, polyolefin resins, dicyclopentadiene resins, polyurethane resins, and the like. These thermoplastic resins can also be used. Further, when adopting a sandwich structure as described later, an elastic body, a foam material, and a honeycomb material can be used as the core material, and a foam material and a honeycomb material are preferable for weight reduction. The material of the foam material is not particularly limited. For example, a foam material made of a polymer material such as polyurethane, acrylic, polystyrene, polyimide, vinyl chloride, or phenol can be used. The material of the honeycomb material is not particularly limited, and for example, a honeycomb material such as an aluminum alloy, paper, or aramid paper can be used.

  In the present invention, various structures can be adopted as the structure for installing the protruding plate. FIG. 1 shows the case where the present invention is applied to a hood of an automobile. However, when the present invention is applied to the same place as this, the present invention is further applied to various uses that generally require impact energy absorption performance. The following various forms can be taken when applying.

  For example, as shown in FIG. 2 and FIG. 3, it is possible to adopt a structure in which a plurality of protruding plates 12 that are inclined with respect to the FRP plate 11 are provided and at least two protruding plates 12 are connected by connecting plates 13 at the tips. . 2 shows a case where the distance between the FRP plate 11 and the connecting plate 13 is relatively long and the oblique angle of the protruding plate 12 is relatively large. FIG. 3 shows that the distance between the FRP plate 11 and the connecting plate 13 is relatively short. Each of the cases where the oblique angle of the protruding plate 12 is relatively small is shown. As described above, the protruding plate 12 is formed integrally with the FRP plate 11 as FRP, the protruding plate 12 and the connecting plate 13 are formed as FRP, and these are integrally formed, and the FRP plate 11 is also included. It is also possible to form the whole integrally.

  Further, as shown in FIG. 4, the notch 23 is provided in the protruding plate 22 inclined with respect to the FRP plate 21, so that the protruding plate 22 is more easily deformed and broken, so that the impact energy is improved. It is also possible to absorb it.

  Further, as shown in FIG. 5, the protrusion plate 32 inclined with respect to the FRP plate 31 is provided with an uneven portion 33 so that the protrusion plate 32 can be more easily deformed, buckled, and destroyed, so that the impact energy is increased. Can be absorbed better.

  Further, as shown in FIG. 6, even when the FRP structure 41 has a sandwich structure in which a core material 44 made of a foam material or the like is interposed between two FRP plates 42 and 43, an appropriate pitch is used. The protruding plate 45 extending in the oblique direction from the one FRP plate 42 toward the other FRP plate 43 can be disposed. If the protruding plate 45 is made of resin or FRP, the entire FRP structure 41 can be integrally formed. Although not shown in the drawings, such a structure can also be applied to a hollow FRP structure in which a portion provided with the core material 44 is hollow.

  Furthermore, as shown in FIG. 7, even when the FRP structure 51 has a hat-shaped stiffener 54 filled with a core material 53 in the FRP plate 52, for example, both sides of the stiffener 54 are connected to the FRP plate. It can be configured as a protruding plate 55 that is inclined with respect to 52. In this case, the plate portion constituting the top surface of the stiffener 54 can also function as the connecting plate shown in FIGS. Also in the case of adopting such a configuration, although not shown in the drawings, it is possible to provide a hollow FRP structure in which a portion provided with the core material 53 is hollow.

  In the FRP structure according to the present invention that can take various forms as described above, an impact load is applied to the FRP plate by providing an appropriate number of protruding plates inclined at an appropriate angle from the FRP plate at an appropriate pitch. When an external force such as the above is applied, the projection plate is deformed, buckled, or broken in accordance with the deformation or displacement of the FRP plate, whereby the impact energy is absorbed well. In particular, by applying the present invention to automobile outer plate members, especially bonnets, it is possible to effectively absorb the impact energy in the event of a collision with a pedestrian, etc. It is possible to reduce the damage given to the camera.

It is a longitudinal cross-sectional view of the FRP structure which concerns on one embodiment of this invention. It is a perspective view of the FRP structure concerning another embodiment of the present invention. It is a perspective view of the FRP structure concerning another embodiment of the present invention. It is a fragmentary perspective view of the FRP structure concerning another embodiment of the present invention. It is a fragmentary perspective view of the FRP structure concerning another embodiment of the present invention. It is a fragmentary sectional view of the FRP structure concerning another embodiment of the present invention. It is a fragmentary sectional view of the FRP structure concerning another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bonnet as FRP structure 2, 11, 21, 31, 42, 52 FRP board 3, 12, 22. 22, 32, 45, 55 Extrusion board 4 Internal mounting thing 13 Connection board 23 Notch 33 Uneven part 43 FRP board 44 , 53 Core material 54 Stiffener

Claims (17)

  An FRP structure having a planar structure portion formed of an FRP plate, wherein the FRP structure has a rib-like protruding plate extending in an oblique direction with respect to the back surface on the back surface side of the FRP plate. body.   The FRP structure according to claim 1, wherein a notch is provided in a part of the protruding plate.   The FRP structure according to claim 1 or 2, wherein a part of the protruding plate is formed in an uneven shape.   The FRP structure according to claim 1, wherein a plurality of the protruding plates are provided.   The FRP structure according to claim 4, wherein at least two protruding plates adjacent to or opposite to each other are connected by a connecting plate at a tip end.   The FRP structure according to any one of claims 1 to 5, wherein the protruding plate is made of FRP and is configured integrally with the FRP plate.   The FRP structure according to claim 5 or 6, wherein the protruding plate and the connecting plate are made of FRP, and the protruding plate and the connecting plate are integrally formed.   In an FRP structure in which a planar structure portion is formed in a sandwich structure in which a core material is interposed between two FRP plates, a rib-like shape extending in an oblique direction from one FRP plate toward the other FRP plate An FRP structure having a protruding plate.   In a FRP structure in which a planar structure portion is formed in a hollow structure in which a space is formed between two FRP plates, a rib-like protrusion that extends in an oblique direction from one FRP plate to the other FRP plate An FRP structure having a plate.   The FRP structure according to claim 8 or 9, wherein a notch is provided in a part of the protruding plate.   The FRP structure according to claim 8, wherein a part of the protruding plate is formed in an uneven shape.   The FRP structure according to any one of claims 8 to 11, wherein a plurality of the protruding plates are provided.   The FRP structure according to any one of claims 8 to 12, wherein the protruding plate is made of FRP and is configured integrally with the one FRP plate.   The FRP structure according to any one of claims 8 to 13, wherein the protruding plate is made of FRP and configured integrally with the other FRP plate.   The FRP structure according to any one of claims 1 to 14, wherein the protruding plate is inclined with respect to the FRP plate at an angle of 10 to 85 degrees.   The FRP structure according to any one of claims 1 to 15, which is used as an outer plate member for an automobile.   The FRP structure according to claim 16, which is used for an automobile bonnet.

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