JP2008007012A - Automotive hood panel made of fiber-reinforced plastic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automotive hood panel made of fiber-reinforced plastic capable of certainly attaining requirement performance relative to the circumstance at collision accident. <P>SOLUTION: In the automotive hood panel made of the fiber-reinforced plastic, an inner made of fiber-reinforced plastic for reinforcing an outer is joined to the outer made of fiber-reinforced plastic for forming an outer surface. The inner has a peripheral edge reinforcement part for surrounding an outer periphery along a peripheral edge of the outer and an inner part reinforcement part arranged so as to be connected to the peripheral edge reinforcement part at the inside surrounded by the peripheral edge reinforcement part. A ratio of length of a front part high rigidity area including a front part reinforcement part extending in a width direction at a vehicle body front part and length of a rear part high rigidity area including a rear part reinforcement part and an inner part reinforcement part extending in a width direction at a vehicle body rear part is 1.5 times or more. An inner bending introduction part extending in a width direction and having lower rigidity and/or strength than front and rear portions is formed on a side part reinforcement part for connecting the front part reinforcement part and the rear part reinforcement part at a specific position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automotive hood panel made of fiber reinforced plastic, and more particularly to a technique for effectively absorbing impact loads and protecting passengers and pedestrians from impacts.

  Automobiles are required to improve safety in the event of a collision, and in particular, the structure of the front part of the vehicle, such as a hood panel, to ensure the safety of passengers and pedestrians when shocking external forces are applied. The member is required to have a structure that absorbs energy by appropriately deforming or breaking the member. Particularly, in the hood panel, the energy is absorbed by the hood panel being bent into a “<” shape from about the center at the time of the collision, and the hood panel is formed with a bending introduction portion that becomes the starting point of the fold. .

  On the other hand, in recent years, instead of metal hood panels, fiber reinforced plastic hood panels have been actively developed. This is because the specific rigidity and non-strength of the fiber reinforced plastic are larger than those of other materials such as metal, so that a lightweight and high rigidity / high strength product can be obtained. For this reason, the conventional fiber reinforced plastic hood panel is not a complicated structure like a metal hood panel (for example, Patent Document 1), but a fiber reinforced plastic outer forming an outer surface, and a peripheral portion thereof. Most of them have a simple shape in which a frame-like inner portion extending over is joined (for example, Patent Document 2). As for the bending function, as in the case of a metal, the bending introduction portion is formed approximately in the vicinity of the center in the longitudinal direction of the vehicle body (for example, Patent Document 3).

However, in recent years, there are many required performances for hood panels, such as strengthening safety performance such as legislation for pedestrian head protection and water leakage performance by electronic control of automobiles, and even in hood panels made of fiber reinforced plastic, There may be a possibility of dealing with a complicated inner layout in which a reinforcing portion and a seal line are arranged inside the frame-shaped inner layout.
JP-A-2005-239092 JP 2002-284038 A JP 2005-125883 A

  When the inner layout is not just a frame-shaped inner layout, but has a complicated inner layout with reinforcements and seal lines inside (typically the ratio of the high rigidity area at the rear to the high rigidity area at the front. Is 1.5 or more), the transmission path of the collision load is complicated, and there is a problem that the bending does not bend satisfactorily just by forming the bending introduction portion in the vicinity of the center in the longitudinal direction of the vehicle body as in the conventional case. For this reason, the energy absorption performance at the time of a collision in the hood may be lowered. Furthermore, if the hood panel is not bent sufficiently, an excessive load is applied to the hinge that connects the hood to the vehicle body at the hood end and the striker that connects the hood at the front end to the vehicle body. It is possible that the problem of damaging the part can also occur.

  The present invention solves the potential problems of the above-mentioned conventional technology, and the required performance in the event of a collision, etc., especially in the case of a collision accident even in a fiber reinforced plastic automobile hood panel having a complicated inner layout. It is an object of the present invention to provide an automotive hood panel made of fiber reinforced plastic that can surely achieve desirable impact energy absorption due to a bending deformation of a letter shape.

In order to achieve the above-mentioned object, a fiber reinforced plastic automobile hood panel of the present invention has the following configuration. (1) A fiber reinforced plastic automobile hood panel in which a fiber reinforced plastic outer that forms an outer surface is joined to a fiber reinforced plastic inner that reinforces the outer,
The inner has a peripheral reinforcement part surrounding the outer periphery along the peripheral edge part of the outer and an internal reinforcement part arranged in connection with the peripheral part reinforcement part inside the peripheral part reinforcement part,
The ratio of the length of the front high rigidity region including the front reinforcing portion extending in the width direction at the front portion of the vehicle body to the length of the rear high rigidity region including the inner reinforcing portion and the rear reinforcing portion extending in the width direction at the rear portion of the vehicle body is 1. There are more than 5 times,
Inner bending introduction that extends in the width direction and has lower rigidity and / or lower strength than the front and rear portions in the side reinforcing portion that connects the front reinforcing portion and the rear reinforcing portion to the location that satisfies the following formula (1): A hood panel for automobiles made of fiber reinforced plastic, characterized by forming a part.
D2 / D1 = (L1 / L2) ⁿ ... (1)
In the formula, L1: Length of front high-rigidity area
L2: Length of rear high rigidity region
D1: Distance from the rear edge of the front high-rigidity area to the inner bending lead
D2: Distance from the front end of the rear high-rigidity region to the inner bending introduction portion n: Power index (1.5 to 2.5)
(2) The fiber reinforced plastic automobile hood panel according to (1), wherein the inner bending introduction portion extends substantially over the entire width of the fiber reinforced plastic inner vehicle body in the width direction.

  (3) The inner bend introducing portion is formed by partially reducing the thickness of the inner made of fiber reinforced plastic. The fiber reinforced plastic made vehicle according to any one of (1) to (2). Food panel.

  (4) The inner bend introducing portion includes a plurality of reinforcing fiber layers, and the inner bend introducing portion is formed by partially changing a laminated structure of the reinforcing fiber layers constituting the fiber reinforced plastic inner. The fiber reinforced plastic automobile food panel according to any one of (1) to (3).

  (5) The fiber reinforcement according to any one of (1) to (4), wherein the inner bending introduction portion is formed by partially reducing the amount of reinforcing fibers constituting the fiber-reinforced plastic inner. Plastic automotive food panel.

  (6) The inner bending introduction portion is formed by disposing discontinuous portions of the reinforcing fibers by cutting a part of the reinforcing fibers constituting the fiber-reinforced plastic inner. (5) The food panel for automobiles according to any one of (5).

  (7) Said (1)-(6) in which said inner bending introduction part is formed by arrange | positioning the dissimilar reinforcing fiber with low rigidity and / or intensity | strength compared with the other part of the said fiber reinforced plastic inner parts. A food panel for automobiles made of fiber-reinforced plastic according to any one of the above.

  (8) On the same line in the vehicle body width direction of the inner bend introducing portion, the outer bend introducing portion extending in the width direction and having lower rigidity and / or strength than the front and rear portions is formed on the outer. (7) The food panel for automobiles made of fiber-reinforced plastic according to any one of (7).

  (9) The hood panel for a fiber-reinforced plastic automobile according to (8), wherein the outer bend introducing portion extends substantially over the entire width of the outer body of the fiber-reinforced plastic.

  (10) The fiber-reinforced plastic automobile according to any one of (8) to (9), wherein the outer bending introduction portion is formed by partially reducing a thickness of the fiber-reinforced plastic outer. Food panel.

  (11) The inner bend introducing portion includes a plurality of reinforcing fiber layers, and the outer bend introducing portion is formed by partially changing a laminated structure of reinforcing fiber layers constituting the outer made of fiber reinforced plastic. The fiber reinforced plastic automobile food panel according to any one of (8) to (10).

  (12) The fiber reinforcement according to any one of (8) to (11), wherein the outer bending introduction portion is formed by partially reducing the amount of reinforcing fibers constituting the fiber-reinforced plastic outer. Plastic automotive food panel.

  (13) The outer bending introduction portion is formed by disposing discontinuous portions of the reinforcing fibers by cutting a part of the reinforcing fibers constituting the fiber-reinforced plastic outer. (12) The food panel for automobiles made of fiber-reinforced plastic according to any one of (12).

  (14) The outer bending introduction portion is formed by disposing different types of reinforcing fibers having lower rigidity and / or strength than the other portions of the outer made of fiber-reinforced plastic. A food panel for automobiles made of fiber-reinforced plastic according to any one of the above.

  (15) The fiber reinforced plastic automobile food panel according to any one of (1) to (14), wherein the outer has a sandwich structure in which a core material is interposed between skin plates of fiber reinforced plastic.

  (16) The fiber reinforced plastic automobile food panel according to (15), wherein the outer bend introducing portion is formed by partially reducing the thickness of the core material.

  (17) The fiber reinforced plastic automobile food panel according to any one of (1) to (16), wherein the reinforcing fiber is carbon fiber.

  According to the present invention, it becomes possible to bend the entire hood panel in a desirable shape at the time of a collision, particularly in a frontal collision, and can exhibit excellent impact energy absorption performance.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings.

  FIG. 1A is a plan view of a fiber reinforced plastic automobile hood panel according to an embodiment of the present invention as viewed from the engine side, and FIG. 1B is an exploded view of the hood panel. In FIG. 1, 1 is a hood panel, 2 is an outer, and 3 is an inner. The outer 2 and the inner 3 are bonded and bonded, and the entire bonded body constitutes the hood panel 1. The hood panel 1 is mounted in front of the vehicle and covers the engine room and the like (see FIG. 14). The outer 2 is a member that forms an outer surface, and constitutes the appearance of the vehicle when attached to the vehicle. The inner 3 is arranged as a structural material on the engine room side and reinforces the outer 2.

Further, the inner 3 according to the present invention is connected to the peripheral edge reinforcing portion on the inner hinge side surrounded by the peripheral edge reinforcing portion and the peripheral edge reinforcing portion surrounding the outer periphery along the peripheral edge portion of the outer 2. And an internal reinforcing portion 8 to be arranged. The internal reinforcing portion 8 has a function as a contact surface of a seal line that prevents intrusion of water into the engine as a safety performance enhancement by increasing the rigidity of the hood 1 or a water leakage performance enhancement. As described above, when the inner 3 has the internal reinforcing portion 8, the hood panel 1 is unbalanced in rigidity with respect to the bending mode before and after the vehicle body. The hood panel 1 also has a fiber reinforced plastic automobile hood panel that can reliably achieve impact energy absorption. Here, as an index indicating the rigidity ratio of the front and rear of the vehicle body, the length L1 of the front high-rigidity region including the front reinforcement portion 4 extending in the width direction at the front portion of the vehicle body and the rear reinforcement portion 5 extending in the width direction at the rear portion of the vehicle body Considering the length L2 of the rear high-rigidity region including the internal reinforcing portion 8, when the ratio is 1.5 or more, the rigidity unbalance is significant, that is, the collision load transmission path becomes complicated, Since the problem of not being bent satisfactorily by simply forming the bending introduction portion in the vicinity of the center in the longitudinal direction of the vehicle body is considered, the present invention is applied.
Here, as shown in FIG. 1A, when the longitudinal direction of the vehicle body is the X direction and the vehicle body width direction is the Y direction, the point where the diagonal line 40 circumscribing the hood 1 intersects the inner circumferential line of the inner 3 and the hood The length along the X direction axis to the front end is L1, and the length along the X direction axis to the intersection of the central axis 41 of the side reinforcing portion 6 and the central axis 42 of the internal reinforcing portion 8 and the rear end of the hood Is L2.
The length L2 is a length along the X-direction axis from the intersection of the central axis 40 of the side reinforcing part 6 and the central axis 41 of the internal reinforcing part 8 to the rear end of the hood.

  In addition, the inner 3 of the present invention has a side reinforcing portion 6 that connects the front reinforcing portion 4 and the rear reinforcing portion 5, and an inner bending introduction portion 9 is provided on the side reinforcing portion 6. It is necessary to form at a specific position to be described later.

  The inner bend introduction portion 9 is a portion formed with rigidity and / or strength lower than other portions, and constitutes an opening / closing mechanism portion that opens and closes the hood panel when an impact force such as a collision is applied to the hood panel. The bending input with the hood lock striker 10 attached to the front center of the vehicle body and the hinges 11 attached to both ends of the vehicle body as the supporting points is concentrated on the inner bending introduction portion 9 to be deformed / destroyed earlier than other portions. Therefore, the hood panel 1 is easily bent from this portion (see FIG. 14). Accordingly, when the vehicle collides with an oncoming vehicle or an object, the hood panel 1 is bent from the inner bend introducing portion 9, and excellent impact energy absorption performance can be exhibited. Further, it is preferable that the inner bending introduction portion 9 extends substantially over the entire width of the inner 3 in the Y direction when the vehicle longitudinal direction is the X direction and the vehicle width direction is the Y direction as shown in the figure. As a result, as shown in FIG. 14, the entire hood panel is surely bent into a "<" shape and can exhibit excellent impact energy absorption performance.

  In the present invention, the internal reinforcement portion 8 is arranged in this way, and in the hood panel 1 having the inner 3 in which the rigidity with respect to the bending mode before and after the vehicle body is unbalanced, the inner bending introduction portion 9 is replaced with the side reinforcement portion 6. It is necessary to form in the place which satisfy | fills following upper formula (1).

D2 / D1 = (L1 / L2) ⁿ ... (1)
In the formula, L1: Length of front high-rigidity area
L2: Length of rear high rigidity region
D1: Distance from the rear end of the front high-rigidity area to the inner bending introduction part 9
D2: Distance from the front end portion of the rear high rigidity region to the inner bending introduction portion 9 n: Power index (1.5 to 2.5)
In Expression (1), L1 and L2 are as described above, D1 is the length from the end of the length L1 of the front high-rigidity region to the central axis 43 of the inner bending introduction portion 9, and D2 is This is the length from the end portion of the length L2 of the rear high rigidity region to the central axis 43 of the inner bending introduction portion 9.

  Moreover, the exponent n needs to be a value of 1.5 to 2.5. If the power index n is less than 1.5, it indicates the approximate center as before, so the rigidity imbalance with respect to the bending mode before and after the vehicle body cannot be corrected reliably, so It does not bend and cannot exhibit excellent impact energy absorption performance.

  On the other hand, when the exponent n exceeds 2.5, D2 becomes extremely short, and the inner bending introduction portion 9 is formed in the very vicinity of the internal reinforcement portion 8. In this case, due to the rigidity of the internal reinforcing portion 8, the effect of the inner bending introduction portion 9 is reduced, and on the contrary, it becomes difficult to bend into a "<" shape, and in this case, excellent impact energy absorption performance cannot be exhibited. For this reason, the power index n needs to be a value of 1.5 to 2.5.

  By setting the inner bending introduction portion 9 at such a specific position, it is possible to correct the rigidity imbalance with respect to the bending mode before and after the vehicle body, and to concentrate the force more securely on the inner bending introduction portion 9, As shown in FIG. 14, the entire hood panel is more reliably bent into a “<” shape and exhibits excellent impact energy absorption performance.

  The inner bending introduction portion 9 in the above embodiment is formed by reducing the thickness of the inner 3 or, when the inner 3 includes a plurality of reinforcing fiber layers, the reinforcing fiber layer constituting the inner 3, for example. By partially changing the laminated structure, by partially reducing the amount of the reinforcing fiber layer, or by disposing a discontinuous portion by breaking a part of the reinforcing fiber layer, or It can be formed by disposing different types of reinforcing fiber layers having lower rigidity and / or strength than the other parts of the inner 3.

  2 to 6 are detailed views of the inner bending introduction portion 9 that is a feature of the present invention in the hood panel 1 according to the above embodiment.

  FIG. 2A is an enlarged view of the inner bending introduction portion 9A when the thickness of the inner 3 is reduced, and FIG. 2B is a cross-sectional view taken along the line AA in FIG. .

  In the present embodiment, the inner bending introduction portion 9A formed in the hood panel 1 has a cross-section V in a part of the inner 3 made of the fiber reinforced plastic 14 formed by laminating a plurality of reinforcing fiber layers 12 constituting the inner 3. A character-shaped notch 13 is formed. Specifically, the notched portion is formed on the outer surface side (engine side) of the inner by making the thickness of the fiber reinforced plastic 14 constituting the inner 3 in the Y direction thinner than the other portions. The notch can be formed on the inner inner surface side (side in contact with the outer side), but is preferably formed on the inner outer surface side (engine side) where the load is most concentrated. In addition to the V shape, the cross section can be appropriately selected, for example, in a U shape or a U shape. Among these, a V-shape in which the load is most concentrated is preferable.

  In this manner, the inner bending introduction portion 9A having a lower rigidity and / or lower strength by reducing the thickness of a part of the fiber reinforced plastic 14 to be thinner than that of the other part is formed at the specific position described above. In the event of a collision, the load concentrates on the inner bending introduction portion 9A and is deformed / destroyed, so that the hood panel 1 is bent (see FIG. 14), and excellent impact energy absorption performance can be exhibited.

  FIG. 3A is an enlarged view of the inner bending introduction portion 9B when the laminated structure of the reinforcing fiber layer 12 constituting the inner 3 is changed, and FIG. It is sectional drawing of B arrow.

  In the present embodiment, the inner bending introduction portion 9B formed in the hood panel 1 is formed by partially changing the orientation angle of the reinforcing fiber layer 12 of the fiber reinforced plastic 14. Specifically, the inner bending introduction part 9B is formed by laminating mainly the reinforcing fiber layer 12A having the orientation angle layer 16 of (± 45 °). As a result, the orientation angle layer 16 of (± 45 °) is mainly laminated in the inner bending introduction portion 9B, and the orientation angle layer 15 of (0 ° / 90 °) is mainly laminated in the other inner portions. Here, the X direction (the longitudinal direction of the vehicle body) is 0 °.

  The fiber reinforced plastic part (inner bending introduction part 9B) mainly laminated with the orientation angle layer 16 of (± 45 °) is a fiber reinforced plastic part mainly laminated with the orientation angle layer 15 of (0 ° / 90 °). Compared with the (inner portion other than the inner bending introduction portion 9B), the rigidity and / or strength is reduced with respect to the input from the X direction.

  The orientation angle of the inner bending introduction portion 9B can be appropriately selected from other orientation angles as long as it is other than (0 ° / 90 °). However, since the rigidity and / or strength becomes higher as it approaches (0 ° / 90 °), it is preferable that the rigidity and / or strength is the lowest (± 45 °).

  In this way, the reinforcing fiber layer 12 utilizes the fact that the rigidity and / or strength changes depending on the orientation, and if the inner bending introduction portion 9B having low rigidity and / or strength is formed at the specific position described above, at the time of collision, Since the load concentrates on the inner bending introduction portion 9B and is deformed / destroyed, the hood panel 1 is bent (see FIG. 14), and excellent impact energy absorption performance can be exhibited.

FIG. 4A is an enlarged view of the inner bending introduction portion 9C when the amount of the reinforcing fiber layer 12 constituting the inner 3 is changed, and FIG. 4B is a cross-sectional view taken along the line CC in FIG. It is sectional drawing of an arrow.
In the present embodiment, the inner bending introduction portion 9 </ b> C formed in the hood panel 1 is formed by partially reducing the reinforcing fiber layer 12 of the fiber reinforced plastic 14. Specifically, the reinforcing fiber layer 12 is laminated on the upper and lower sides of the reinforcing fiber layer 12B having the portion 17 where the reinforcing fiber layer is not provided in the portion where the inner bending introduction portion 9C is formed, and is reinforced by bonding with a resin. An inner bending introduction portion 9C having no fiber layer (only resin is present) is formed. The portion 17 where the reinforcing fiber layer is not provided has lower rigidity and / or strength than the portion where the reinforcing fiber layer is provided.

  In addition, as a method of partially reducing the amount of the reinforcing fiber layer 12, for example, the amount of the apparent reinforcing fiber layer 12 is reduced by increasing the amount of the resin without reducing the amount of the reinforcing fiber layer 12 (reinforcement). The method of lowering the volume content of the fiber layer can be appropriately selected. However, since the outer shape changes in this case, it is preferable to form a portion without the reinforcing fiber layer 12 in terms of design.

  If the inner bend introduction portion 9C having low rigidity and / or strength is formed at the above-described specific position by utilizing the fact that the rigidity and / or strength varies depending on the amount of the reinforcing fiber layer 12 in this manner, Since the load concentrates on the inner bending introduction portion 9C and is deformed / destroyed, the hood panel 1 is bent (see FIG. 14), and excellent impact energy absorption performance can be exhibited.

  FIG. 5A is an enlarged view of the inner bending introduction portion 9D in the case where the discontinuous portion 18 of the reinforcing fiber is formed by cutting a part of the reinforcing fiber layer 12 constituting the inner 3, and FIG. FIG. 5B is a cross-sectional view taken along the line DD in FIG. 5A, and FIG. 5C is an enlarged view of a main part of the discontinuous portion 18 of the reinforcing fiber layer 12.

  In the present embodiment, the inner bending introduction portion 9D formed in the hood panel 1 breaks a part of the reinforcing fiber layer 12 of the fiber reinforced plastic 14 so that the reinforcing fiber layer 12 having low rigidity and / or strength is formed. A discontinuous portion 18 is formed and formed as an inner bending introduction portion 9D.

  Specifically, among the reinforcing fiber layers 12 of the portion forming the inner bending introduction portion 9D, the reinforcing fibers 19 of several reinforcing fiber layers 12C laminated on the inner layer are broken, and the reinforcing fiber layers 12 are formed above and below the reinforcing fiber layers 12. By laminating and joining with resin, an inner bending introduction portion 9D which is a discontinuous portion of the reinforcing fiber layer 12 is formed. As described above, a part of the reinforcing fiber layer 12 is broken to form the discontinuous portion 18, thereby reducing the rigidity and / or strength of the portion (inner bending introduction portion 9 </ b> D).

  The reinforcing fiber layer 12C to be cut may be laminated on the outermost layer. However, since the cut portion can be seen, it is preferable that the reinforcing fiber layer 12C is laminated on the inner layer.

Further, as another method of forming the discontinuous portion 18 of the reinforcing fiber layer 12, for example, the reinforcing fiber layers 12 extending from the front and rear may be simply attached without overlapping.
If the inner bending introduction portion 9D having low rigidity and / or strength is formed at the above-described specific position by breaking a part of the reinforcing fiber layer 12 to form the discontinuous portion 18 in this way, the inner portion can be formed at the time of collision. Since the load concentrates on the bending introduction portion 9D and is deformed / destroyed, the hood panel 1 is bent (see FIG. 14), and excellent impact energy absorption performance can be exhibited.

FIG. 6A is an enlarged view of the inner bending introduction portion 9E formed by disposing different types of reinforcing fiber layers 20, and FIG. 6B is an EE arrow in FIG. 6A. FIG.
In the present embodiment, the inner bending introduction portion 9E formed on the hood panel 1 is formed by laminating different types of reinforcing fiber layers 20 having lower rigidity and / or strength than the other portions of the inner 3. It is. Specifically, the reinforcing fiber layer similar to the other part of the inner 3 is formed above and below the reinforcing fiber layer 12D having the different reinforcing fiber layers 20 having low rigidity and / or strength at the site where the inner bending introduction portion 9E is formed. By laminating 12 and joining with resin, an inner bending introduction portion 9E formed of different types of reinforcing fiber layers 20 having low rigidity and / or strength is formed.

  For example, carbon fibers (for example, M40 varieties manufactured by Toray Industries, Inc .; Young's modulus 392 GPa, tensile strength 2.45 GPa) are used as the reinforcing fibers of the reinforcing fiber layer 12, and the different reinforcing fiber layers 20 having low rigidity and / or strength are used. By using glass fiber (for example, E glass; Young's modulus 75 GPa, tensile strength 2.5 GPa) as the reinforcing fiber, it is possible to form the inner bending introduction portion 9E having the same strength and low rigidity. In addition, carbon fibers (for example, T700SC; Young's modulus 230 GPa, tensile strength 4.9 GPa) manufactured by Toray Industries, Inc. are used as the reinforcing fibers of the reinforcing fiber layer 12, and the reinforcing fibers of the different reinforcing fiber layers 20 having low rigidity and / or strength are used. As described above, by using carbon fiber (for example, T300 manufactured by Toray Industries, Inc., Young's modulus 230 GPa, tensile strength 3.53 GPa), it is possible to form the inner bending introduction portion 9E having the same rigidity and low strength.

  If the inner bending introduction portion 9E having low rigidity and / or strength is formed at the specific position described above by laminating the different types of reinforcing fiber layers 20 having lower rigidity and / or strength than the other portions as described above, the collision will occur. At this time, since the load concentrates on the inner bending introduction portion 9E and is deformed / destructed, the hood panel 1 is bent (see FIG. 14), and it is possible to exhibit excellent impact energy absorption performance.

  Next, FIG. 7 shows a hood panel 1 according to still another embodiment of the present invention, in which the outer portion 2 of the hood panel 1 having the inner bending introduction portion 9 has other portions having rigidity and / or strength. The outer bending introduction part 21 formed lower than that is formed.

FIG. 7A is a plan view of the fiber reinforced plastic automobile hood panel 1 according to this embodiment as viewed from the engine side, and FIG. 7B is an exploded view of the hood panel.
In FIG. 7, 21 is an example of an outer bend introducing portion that is a feature of the present invention, and the outer bend introducing portion 21 is formed on the same line as the inner bend introducing portion 9 in the Y direction.
In this embodiment as well, the inner bending introduction portion 9 is formed at a location that satisfies the formula (1).

  Since the positions of the bending introduction portions 9 and 21 formed in the outer 2 and the inner 3 are the same as described above, there is a position where stress is concentrated with respect to the bending input with the hood lock striker 10 and the hinge 11 as support points. It becomes the same, and also the hood panel 1 is easily bent (see FIG. 14).

  Further, it is preferable that the outer bend introducing portion 21 extends substantially over the entire width in the Y direction of the outer 2 when the vehicle longitudinal direction is the X direction and the vehicle width direction is the Y direction as shown in the figure. As a result, as shown in FIG. 14, the entire hood panel is surely bent into a "<" shape and can exhibit excellent impact energy absorption performance.

  The outer bend introduction part 21 in the said embodiment is the reinforcement fiber layer which comprises the said outer 2 by making the thickness of the outer 2 thin, or when the said outer 2 contains a some reinforcement fiber layer, for example. By partially changing the laminated structure, by partially reducing the amount of the reinforcing fiber layer, or by disposing a discontinuous portion by breaking a part of the reinforcing fiber layer, or It can be formed by disposing different types of reinforcing fiber layers having lower rigidity and / or strength than other parts of the outer 2.

  8 to 12 are detailed views of the outer bend introducing portion 21 that is a feature of the present invention in the hood panel 1 according to the above embodiment.

FIG. 8A is an enlarged view of the outer bending introduction portion 21A when the thickness of the outer 2 is reduced, and FIG. 8B is a cross-sectional view taken along the line FF in FIG. 8A. .
In the present embodiment, the outer bend introduction portion 21A formed in the hood panel 1 has a cross-section V on a part of the outer 2 made of fiber reinforced plastic 24 formed by laminating a plurality of reinforcing fiber layers 22 constituting the outer 2. A letter-shaped notch 23 is formed.

  Specifically, the notch is formed on the inner surface side (engine side) of the outer by making the thickness of the fiber reinforced plastic 24 that molds the outer 2 in the Y direction thinner than other portions. The cutout portion can be formed on the outer outer surface side, but is preferably formed on the outer inner surface side where the load is most easily concentrated. Furthermore, since the outer outer surface side is almost always the design surface as it is, it is preferably formed on the outer inner surface side in terms of design. In addition to the V shape, the cross section can be appropriately selected, for example, in a U shape or a U shape. Among these, a V-shape in which the load is most concentrated is preferable.

  As described above, the outer bend introduction portion 21A having a lower rigidity and / or lower strength by reducing the thickness of a part of the fiber reinforced plastic 24 to be thinner than that of the other part is formed at the specific position described above. In the event of a collision, the load concentrates on the outer bend introduction portion 21A and deforms / destroy. By combining with the inner bend introduction portion 9, the hood panel 1 is more likely to bend (see FIG. 14) and has excellent impact energy. Absorption performance can be exhibited.

  Fig.9 (a) is an enlarged view of the outer bending introduction part 21B at the time of changing the lamination structure of the reinforcing fiber layer 22 which comprises the outer 2, FIG.9 (b) is G- of FIG.9 (a). It is sectional drawing of G arrow.

  In the present embodiment, the outer bend introduction portion 21 </ b> B formed in the hood panel 1 is formed by partially changing the orientation angle of the reinforcing fiber layer 22 of the fiber reinforced plastic 24. Specifically, the outer bend introducing portion 21B is formed by mainly laminating the reinforcing fiber layer 22A having the orientation angle layer 26 of (± 45 °). Thereby, the orientation angle layer 26 of (± 45 °) is mainly laminated in the outer bend introducing portion 21B, and the orientation angle layer 25 of (0 ° / 90 °) is mainly laminated in the other outer portions. Here, the X direction (the longitudinal direction of the vehicle body) is 0 °.

  The fiber reinforced plastic portion 21 (outer bending introduction portion 21B) mainly composed of the (± 45 °) orientation angle layer 26 is a fiber reinforced plastic mainly composed of the (0 ° / 90 °) orientation angle layer 25. Compared to the portion (outer portion other than the outer bend introduction portion 21B), the rigidity and / or strength is reduced with respect to the input from the X direction.

  The orientation angle of the outer bending introduction portion 21B can be appropriately selected from other orientation angles as long as it is other than (0 ° / 90 °). However, since the rigidity and / or strength becomes higher as it approaches (0 ° / 90 °), it is preferable that the rigidity and / or strength is the lowest (± 45 °).

  In this way, the reinforcing fiber layer 22 utilizes the change in rigidity and / or strength depending on the orientation to form the outer bending introduction portion 21B having low rigidity and / or strength at the above-described specific position. Since the load concentrates on the outer bend introducing portion 21B and deforms / breaks, the hood panel 1 is more easily bent when combined with the inner bend introducing portion 9 (see FIG. 14), and exhibits excellent impact energy absorption performance. Is possible.

  Fig.10 (a) is an enlarged view of the outer bending introduction part 21C at the time of changing the quantity of the reinforcing fiber layer 22 which comprises the outer 2, FIG.10 (b) is HH of FIG.10 (a). It is sectional drawing of an arrow.

  In the present embodiment, the outer bending introduction portion 21 </ b> C formed in the hood panel 1 is formed by partially reducing the reinforcing fiber layer 22 of the fiber reinforced plastic 24. Specifically, the reinforcing fiber layer 22 is laminated on the upper and lower sides of the reinforcing fiber layer 22B having the portion 27 where the reinforcing fiber layer is not provided in the portion where the outer bending introduction portion 21C is formed, and the reinforcing fiber layer 22 is joined by a resin. An outer bend introducing portion 21C having no layer (only resin is present) is formed.

The portion 27 where the reinforcing fiber layer is not provided has lower rigidity and / or strength than the portion where the reinforcing fiber layer is provided.
In addition, as a method of partially reducing the amount of the reinforcing fiber layer 22, for example, the amount of the apparent reinforcing fiber layer 22 is reduced by increasing the amount of the resin without reducing the amount of the reinforcing fiber layer 22 (reinforcement). The method of lowering the volume content of the fiber layer can be appropriately selected. However, since the outer shape changes in this case, it is preferable to form a portion without the reinforcing fiber layer 22 in terms of design.

  If the outer bend introduction portion 21C having low rigidity and / or strength is formed at the specific position described above by utilizing the change in rigidity and / or strength depending on the amount of the reinforcing fiber layer 22 in this manner, Since the load concentrates on the outer bending introduction portion 21C and is deformed / destroyed, by combining with the inner bending introduction portion 9, the hood panel 1 is more easily bent (see FIG. 14), and the occupant can be protected.

  FIG. 11A is an enlarged view of the outer bend introducing portion 21D when a discontinuous portion of the reinforcing fiber is formed by cutting a part of the reinforcing fiber layer 22 constituting the outer 2, and FIG. ) Is a cross-sectional view taken along the line II of FIG. 11A, and FIG. 11C is an enlarged view of a main part of a discontinuous portion of the reinforcing fiber layer 22.

  In the present embodiment, the outer bend introduction portion 21D formed in the hood panel 1 breaks a part of the reinforcing fiber layer 22 of the fiber reinforced plastic 22 so that the reinforcing fiber layer 22 having low rigidity and / or strength can be obtained. A discontinuous portion 28 is formed and formed as an outer bending introduction portion 21D. Specifically, among the reinforcing fiber layers 22 of the portion forming the outer bending introduction part 21D, the reinforcing fibers 29 of several reinforcing fiber layers 22C laminated on the inner layer are broken, and the reinforcing fiber layers 22 are laminated on the upper and lower sides thereof. And the outer bending introduction part 21D which is the discontinuous part of the reinforced fiber layer 22 is formed by joining with resin. As described above, by breaking a part of the reinforcing fiber layer 22 to form the discontinuous portion 28, the rigidity and / or strength of the portion (outer bending introduction portion 21D) is lowered.

  The reinforcing fiber layer 22C to be cut may be laminated on the outermost layer. However, since the cut portion can be seen, it is preferable that the reinforcing fiber layer 22C is laminated on the inner layer.

  Further, as another method of forming the discontinuous portion 28 of the reinforcing fiber layer 22, for example, the reinforcing fiber layers 22 extending from the front and rear may be simply attached without overlapping.

  If the outer bend introduction portion 21D having a low rigidity and / or strength is formed at the specific position described above by breaking a part of the reinforcing fiber layer 22 to form the discontinuous portion 28 in this way, the outer Since the load concentrates on the bending introduction portion 21D and is deformed / destroyed, the hood panel 1 can be more easily bent when combined with the inner bending introduction portion 9 (see FIG. 14), and exhibits excellent impact energy absorption performance. It becomes possible.

  12A is an enlarged view of the outer bend introduction portion 21E formed by disposing different types of reinforcing fiber layers 30, and FIG. 12B is a JJ arrow in FIG. 12A. FIG.

  In the present embodiment, the outer bend introduction portion 21E formed on the hood panel 1 is formed by laminating different types of reinforcing fiber layers 30 having lower rigidity and / or strength than the other portions of the outer 2. It is. Specifically, a reinforcing fiber layer similar to the other part of the outer 2 is formed above and below a reinforcing fiber layer 22D having different types of reinforcing fiber layers 30 having low rigidity and / or strength at a portion where the outer bending introduction portion 21E is formed. By laminating 22 and joining with resin, an outer bend introducing portion 21E formed of different types of reinforcing fibers having low rigidity and / or strength is formed.

  For example, carbon fibers (for example, M40 varieties manufactured by Toray Industries, Inc .; Young's modulus 392 GPa, tensile strength 2.45 GPa) are used as the reinforcing fibers of the reinforcing fiber layer 22, and different types of reinforcing fiber layers 30 with low rigidity and / or strength are used. By using glass fiber (for example, E glass; Young's modulus 75 GPa, tensile strength 2.5 GPa) as the reinforcing fiber, the outer bend introducing portion 21E having the same strength and low rigidity can be formed. Further, carbon fibers (for example, T700SC; Young's modulus 230 GPa, tensile strength 4.9 GPa) manufactured by Toray Industries, Inc. are used as the reinforcing fibers of the reinforcing fiber layer 22, and the reinforcing fibers of the different reinforcing fiber layers 30 having low rigidity and / or strength are used. As described above, by using carbon fibers (for example, T300 manufactured by Toray Industries, Inc., Young's modulus 230 GPa, tensile strength 3.53 GPa), it is possible to form the outer bend introduction portion 21 </ b> E having the same rigidity and low strength.

  If the outer bending lead portion 21E having low rigidity and / or strength is formed at the specific position described above by laminating different types of reinforcing fiber layers 30 having lower rigidity and / or strength than other portions in this way, the collision will occur. At this time, the load concentrates on the outer bend introducing portion 21E and deforms / breaks. Therefore, by combining with the inner bend introducing portion 9, the hood panel 1 is more easily bent (see FIG. 14), and has excellent impact energy absorption performance. It becomes possible to demonstrate.

  In addition, the inner bend introducing portion 9 when the outer bend introducing portion 21 is formed is not limited to the one formed by the same method as the outer bend introducing portion 21, and the inner bending introducing portion 9 is formed. Any of (FIGS. 2 to 6) is possible.

  Next, FIG. 13 shows a hood panel 1 according to still another embodiment of the present invention, in which the outer 2 has a sandwich structure in which a core material 34 is interposed between fiber reinforced plastic skin plates 33. Shows the case.

  FIG. 13A is a plan view of the fiber reinforced plastic automobile hood panel 1 according to the present embodiment as viewed from the engine side, and FIG. 13B is a cross-sectional view taken along the line KK in FIG. FIG.

In FIG. 13, 31 and 32 are examples of the inner and outer bend introducing portions that are features of the present invention, and the outer bend introducing portion 32 is formed on the same line as the inner bend introducing portion 31 in the Y direction.
In the present embodiment, the inner bend introducing portion 31 is formed at a location that satisfies the formula (1).

As shown in FIG. 13 (b), is the outer 2 configured in a sandwich structure in which a core material 34 (for example, acrylic foam) is interposed between the skin plates 33 of fiber reinforced plastic substantially throughout the entire surface? Alternatively, the peripheral portion has a single-plate structure of a fiber reinforced plastic skin plate 33, and is configured in a sandwich structure over substantially the entire portion other than the peripheral portion. This sandwich structure can exhibit high rigidity as well as light weight.
In the present embodiment, the outer bending introduction portion 32 is formed by partially reducing the thickness of the core material 34 constituting the outer 2. Specifically, as shown in the figure, when the vehicle longitudinal direction is the X direction and the vehicle width direction is the Y direction, the core material 34 is partially cut by cutting the core material into a V shape along the Y direction. The outer bend introduction part 32 is formed by laminating thinly, laminating reinforcing fiber layers on the upper and lower sides of the core material 34, and bonding them with resin.

  Further, the outer bend introduction portion 32 has a substantially constant V-shaped cross-sectional shape and extends in the entire width in the Y direction. In the cross section, as shown in FIG. It remains in thickness and is kept in a sandwich structure. By leaving the thin core material 34 in this way, it becomes possible to prevent the bent line on the inner surface side (engine side) from appearing on the outer surface side, and the surface design can be improved.

  Further, it is preferable that the outer bend introducing portion 32 extends substantially over the entire width of the outer 2 in the Y direction when the vehicle longitudinal direction is the X direction and the vehicle width direction is the Y direction as shown in the figure. As a result, as shown in FIG. 14, the hood panel 1 as a whole can be surely bent into a "<" shape and can exhibit excellent impact energy absorption performance.

  As described above, when the outer 2 is a sandwich structure, the outer bending introduction portion 32 having low rigidity and / or low strength by reducing the cross-sectional rigidity by partially reducing the thickness of the core material 34 constituting the outer 2 is provided. Since it is formed, the load concentrates on the outer bend introduction portion 32 and is deformed / destroyed at the time of collision. By combining with the inner bend introduction portion 31, the hood panel 1 is more easily bent (see FIG. 14), which is excellent. It is possible to exhibit the impact energy absorption performance.

  In addition, when the outer 2 is a sandwich structure, the core material 34 as described above is partially thinned to form the outer bend introduction portion 32, and the fiber reinforced plastic skin plate 33 constituting the sandwich structure, By applying the means shown in FIGS. 8 to 12 as described above, it is possible to form the outer bending introduction portion 32. For example, by reducing the thickness of the skin plate 33, or when the outer 2 includes a plurality of reinforcing fiber layers, by partially changing the laminated configuration of the reinforcing fiber layers constituting the skin plate 33. Alternatively, by partially reducing the amount of the reinforcing fiber layer, or by discontinuous portions by breaking a part of the reinforcing fiber layer, or other portions of the skin plate 33 It can be formed by disposing different types of reinforcing fiber layers having lower rigidity and / or strength than the above.

  When forming the outer bend introduction part 32 in the sandwich structure by these methods, it is preferable to form it on the skin plate 33 on the outer inner surface side (engine side) from the viewpoint of design.

  Furthermore, as an automobile hood panel 1 made of fiber reinforced plastic according to another embodiment of the present invention, the outer 2 has a sandwich structure. However, the outer 2 is not formed with the outer bend introducing portion 32, and only the inner 3 has the inner structure. It is possible only by forming the bending introduction part 31. Also in the present embodiment, the inner bending introduction portion 31 is formed at a location that satisfies the formula (1).

  The inner bend introducing portion 31 in the above embodiment is, for example, a reinforcing fiber layer constituting the inner 3 by reducing the thickness of the inner 3 or when the inner 3 includes a plurality of reinforcing fiber layers. By partially changing the laminated structure of the above, or by partially reducing the amount of the reinforcing fiber layer, or by disposing a discontinuous portion by breaking a part of the reinforcing fiber layer, Alternatively, it can be formed by disposing different types of reinforcing fiber layers having lower rigidity and / or strength than other parts of the inner 3.

  In the present invention, the fiber reinforced plastic refers to a resin reinforced by a reinforcing fiber layer, and examples of the reinforcing fibers constituting the reinforcing fiber layer include inorganic fibers such as carbon fibers and glass fibers, Kevlar fibers, Examples thereof include reinforcing fibers made of organic fibers such as polyethylene fibers and polyamide fibers. From the viewpoint of easy control of surface rigidity, carbon fiber is particularly preferable. Here, “surface rigidity” refers to rigidity for maintaining an initial predetermined surface shape.

  Examples of the fiber reinforced plastic matrix resin include thermosetting resins such as epoxy resins, unsaturated polyester resins, vinyl ester resins, phenol resins, and acrylic resins, polycarbonate resins, polyethylene resins, polypropylene resins, Thermoplastic resins such as polyamide resin, polyolefin resin, dicyclopentadiene resin, polyurethane resin, polybutylene terephthalate resin, polyacetal resin, and ABS resin, and modified resins obtained by alloying these resins can also be used.

  In addition, as the core material in the case of adopting the sandwich structure, an elastic body, a foam material, and a honeycomb material can be used, and a foam material is particularly preferable for weight reduction. The material of the foam material is not particularly limited, and for example, a foam material of a polymer material such as polyurethane, acrylic, polystyrene, polyimide, vinyl chloride, or phenol can be used. The honeycomb material is not particularly limited, and for example, an aluminum alloy, paper, aramid paper, or the like can be used.

  The fiber reinforced plastic automobile food panel of the present invention can be manufactured by a known fiber reinforced plastic manufacturing method such as a hand lay-up method, an autoclave method, an RTM method, a SCRIMP method, or a SPRINT method. In particular, the RTM method and the SCRIMP method are preferable because they are excellent in mass productivity.

  Examples of the present invention will be described below.

(Example 1)
As an embodiment, a sandwich-structure fiber reinforced plastic automobile hood panel 1 having an inner bend introducing portion 31 shown in FIG. 15A will be described.

The design of the inner bend introducing portion 31 of the hood panel 1 has a maximum design length of 1600 mm, a maximum width of 1750 mm, L1: 250 mm, L2: 550 mm, and a hood panel 1 as shown in FIG. Based on 1), the position of the inner bending introduction portion 31 was designed with an exponent n = 2. From the formula (1), D1 is 660 mm and D2 is 140 mm, and the inner bending introduction portion 31 is formed at the position.

-Production of food panel 1 Carbon fiber plain weave cloth ("CO6434" manufactured by Toray Industries, Inc., 198 g / m2) made of carbon fiber ("T300" manufactured by Toray Industries, Inc .; Young's modulus 230 GPa, tensile strength 3.53 GPa) Acrylic resin foam material (Sekisui Chemical Co., Ltd., “Sekisui Formac”; expansion ratio 20 times), cloth ([0 ° / 90 °] / [± 45 °]) / formac 8 mm / cross ([± 45 °] / [0 ° / 90 °]), and outer 2 was formed by SCRIMP molding.

  Also, carbon fiber plain weave cloth of the same kind is laminated in a laminated structure of [[0 ° / 90 °] / [± 45 °] / [± 45 °] / [0 ° / 90 °]), and the inner 3 Was molded. The inner bending introduction part 31 was formed by a method of disposing discontinuous parts by partially breaking the reinforcing fibers of the reinforcing fiber layer at the position as shown in FIG.

  For both the outer 2 and inner 3, an epoxy resin (“Epicoat” 1750 manufactured by JER Co., Ltd., “Epicure” W manufactured by JER Co., Ltd.) was used as the matrix resin.

A hood panel 1 was manufactured by bonding a steel hood lock striker 10 and an aluminum hinge 11 to the molded inner 3 and further bonding to the outer 2.
As the adhesive, a urethane-based adhesive (“Mighty Grip” main agent No. 5000, curing agent No. 5030 manufactured by Etec Co., Ltd.) was used.

  Impact test When the manufactured hood panel 1 was attached to the vehicle body and an impact load was input along the X-axis from the front to the rear of the vehicle body, the hood panel 1 was “ku” from the inner bend introducing portion 35 as shown in FIG. It was found to be bent into a shape and have the desired performance.

(Comparative Example 1)
As a comparative example, an inner bend introducing portion 31 as shown in FIG. 15B was installed in the vicinity of the central portion as in the conventional concept, and the hood panel 1 having the same structure as described in Example 1 was manufactured. When an impact load was input to the hood panel 1, the inner 3 around the hinge 11 disposed at the rear part of the hood panel 1 was broken without bending in a “ku” shape.

  Although specific embodiments to which the present invention is applied have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention can be applied to a trunk lid panel installed on the rear side of an automobile, but the application range is not limited thereto.

It is the top view which looked at the 1st mode of the food panel for automobiles made from fiber reinforced plastics of the present invention from the engine side. FIG. 2 is an exploded view of FIG. It is an enlarged view which shows an example of the inner bend introducing | transducing part in the 1st aspect of the food panel made from the fiber reinforced plastics of this invention. It is sectional drawing of the AA arrow of Fig.2 (a). It is an enlarged view which shows another example of the inner bending introducing | transducing part in the 1st aspect of the food panel made from fiber reinforced plastics of this invention. It is sectional drawing of the BB arrow of Fig.3 (a). It is an enlarged view which shows another example of the inner bending introducing | transducing part in the 1st aspect of the food panel made from fiber reinforced plastics of this invention. It is sectional drawing of CC arrow of Fig.4 (a). It is an enlarged view which shows another example of the inner bending introducing | transducing part in the 1st aspect of the food panel made from fiber reinforced plastics of this invention. It is sectional drawing of the DD arrow of Fig.5 (a). FIG. 6 is an enlarged plan view of a reinforcing fiber layer 12C in FIG. It is an enlarged view which shows another example of the inner bending introducing | transducing part in the 1st aspect of the food panel made from fiber reinforced plastics of this invention. It is sectional drawing of the EE arrow of Fig.6 (a). It is the top view which looked at the 2nd aspect of the food panel for automobiles made from fiber reinforced plastics of the present invention from the engine side. FIG. 8 is an exploded view of FIG. It is an enlarged view which shows an example of the outer bending introducing | transducing part in the 2nd aspect of the food panel for motor vehicles made from fiber reinforced plastics of this invention. It is sectional drawing of the FF arrow of Fig.8 (a). It is an enlarged view which shows another example of the outer bending introducing | transducing part in the 2nd aspect of the food panel for motor vehicles made from fiber reinforced plastics of this invention. It is sectional drawing of GG arrow of Fig.9 (a). It is an enlarged view which shows another example of the outer bending introducing | transducing part in the 2nd aspect of the hood panel made from fiber reinforced plastics of this invention. It is sectional drawing of the HH arrow of Fig.10 (a). It is an enlarged view which shows another example of the outer bending introducing | transducing part in the 2nd aspect of the food panel for motor vehicles made from fiber reinforced plastics of this invention. It is sectional drawing of the II arrow of Fig.11 (a). It is an enlarged plan view of the reinforcing fiber layer 12D of FIG. It is an enlarged view which shows another example of the outer bending introducing | transducing part in the 2nd aspect of the food panel for motor vehicles made from fiber reinforced plastics of this invention. It is sectional drawing of the JJ arrow of Fig.12 (a). It is the top view which looked at the 3rd embodiment of the automobile food panel made from fiber reinforced plastics of the present invention from the engine side. It is sectional drawing of KK arrow of Fig.13 (a). It is a figure which shows how to bend the food panel for automobiles made from the fiber reinforced plastic of this invention. It is the top view which looked at the aspect of the food panel for automobiles made from the fiber reinforced plastic to which the present invention is applied in Example 1 from the engine side. It is the top view which looked at the aspect of the food panel for automobiles made from fiber reinforced plastic which does not apply the present invention in comparative example 1 from the engine side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Food panel 2 Outer 3 Inner 4 Front part reinforcement part 5 Rear part reinforcement part 6 Side part reinforcement part 8 Internal reinforcement part 9 Inner bending introduction part 9A Inner bending introduction part 9B when the thickness of the inner 3 is made thin 3 is comprised Inner bending introduction part 9C when the laminated structure of the reinforcing fiber layer 12 is changed Inner bending introduction part 9D when the amount of the reinforcing fiber layer 12 constituting the inner 3 is changed Part of the reinforcing fiber layer 12 constituting the inner 3 Inner bending introduction portion 9E when discontinuous portion 18 of reinforcing fiber is formed by cutting the inner fiber Introducing inner bending introduction portion 10 when forming dissimilar reinforcing fiber layer 20 hood lock striker 11 hinge 12 inner 3 The reinforcing fiber layer 12 having the orientation angle layer 16 of the notch 12A (± 45 °) having a V-shaped cross section. B Reinforcing fiber layer 12C having a portion 17 where no reinforcing fiber layer is provided Reinforcing fiber layer 12D having a discontinuous portion 18 of reinforcing fibers Reinforcing fiber layer 13 having different reinforcing fiber layers 20 Notched portion 14 having a V-shaped cross section Inner 3 of a fiber reinforced plastic 15 (0 ° / 90 °) formed by laminating a plurality of reinforcing fiber layers 12 constituting 3 An orientation angle layer 17 of an orientation angle layer 16 (± 45 °) 17 A portion having no reinforcement fiber layer 18 Discontinuous portion 18 Discontinuous portion 19 of reinforcing fiber layer 12 Reinforcing fiber 20 of reinforcing fiber layer 12C Dissimilar reinforcing fiber layer 21 Outer bending introduction portion 21A Outer bending introduction portion 21B when outer 2 is made thinner Outer bending introduction part 21C when the laminated structure of the reinforcing fiber layer 22 is changed The outer bending introduction when the amount of the reinforcing fiber layer 22 constituting the outer 2 is changed When the discontinuous part of the reinforcing fiber is formed by cutting a part of the reinforcing fiber layer 22 constituting the part 21D outer 2, the outer bending introduction part 21E is formed by disposing the different reinforcing fiber layer 30 Outer bending introduction part 22 Reinforcement fiber layer 22B which has orientation angle layer 26 of reinforcement fiber layer 22A (± 45 degrees) which constitutes outer 2 Reinforcement fiber layer 22C which has part 27 which does not provide a reinforcement fiber layer Discontinuous part of reinforcement fiber Reinforcing fiber layer 22D having 28 Reinforcing fiber layer 23 having different kinds of reinforcing fiber layers 30 Notched portion 24 having a V-shaped cross section Fiber reinforced plastic 25 formed by laminating a plurality of reinforcing fiber layers 22 constituting outer 2 (0 ° / 90 °) orientation angle layer 26 (± 45 °) orientation angle layer 27 Site 28 without reinforcing fiber layer Discontinuous portion 29 of reinforcing fiber layer 22 Strength of reinforcing fiber layer 22C Fiber 30 Different types of reinforcing fiber layers 31 Inner bend introduction part 32 Outer bend introduction part 33 Fiber reinforced plastic skin plate 34 Core material 35 Bend introduction part 40 Diagonal line 41 in a rectangle circumscribing the hood 1 Central axis 42 of the side reinforcement part 6 Central axis 43 of the inner reinforcing part 8 Central axis of the inner bending introduction part 9

Claims (17)

A fiber reinforced plastic automobile hood panel in which a fiber reinforced plastic inner that reinforces the outer is joined to a fiber reinforced plastic outer that forms an outer surface,
The inner has a peripheral reinforcement part surrounding the outer periphery along the peripheral edge part of the outer and an internal reinforcement part arranged in connection with the peripheral part reinforcement part inside the peripheral part reinforcement part,
The ratio of the length of the front high rigidity region including the front reinforcing portion extending in the width direction at the front portion of the vehicle body to the length of the rear high rigidity region including the inner reinforcing portion and the rear reinforcing portion extending in the width direction at the rear portion of the vehicle body is 1. There are more than 5 times,
Inner bending introduction that extends in the width direction and has lower rigidity and / or lower strength than the front and rear portions in the side reinforcing portion that connects the front reinforcing portion and the rear reinforcing portion to the location that satisfies the following formula (1): A hood panel for automobiles made of fiber reinforced plastic, characterized by forming a part.
D2 / D1 = (L1 / L2) ⁿ ... (1)
In the formula, L1: Length of front high-rigidity area
L2: Length of rear high rigidity region
D1: Distance from the rear edge of the front high-rigidity area to the inner bending lead
D2: Distance from the front end of the rear high-rigidity region to the inner bending introduction portion n: Power index (1.5 to 2.5)   2. The fiber reinforced plastic automobile hood panel according to claim 1, wherein the inner bend introducing portion extends substantially over the entire width of the inner body of the fiber reinforced plastic.   3. The fiber reinforced plastic automobile hood panel according to claim 1, wherein the inner bending introduction part is formed by partially reducing the thickness of the fiber reinforced plastic inner.   The inner bend introducing portion includes a plurality of reinforcing fiber layers, and the inner bend introducing portion is formed by partially changing a laminated structure of reinforcing fiber layers constituting the inner made of fiber reinforced plastic. The fiber reinforced plastic automobile food panel according to any one of claims 1 to 3.   The fiber reinforced plastic automobile food panel according to any one of claims 1 to 4, wherein the inner bend introducing portion is formed by partially reducing the amount of reinforcing fibers constituting the fiber reinforced plastic inner. .   The said inner bending introduction part is formed by arrange | positioning the discontinuous part of the said reinforced fiber by cut | disconnecting a part of reinforcing fiber which comprises the said fiber reinforced plastic inner. A food panel for automobiles made of fiber-reinforced plastic as described in 1.   The inner bending introduction portion is formed by disposing different kinds of reinforcing fibers having lower rigidity and / or strength than other portions of the fiber-reinforced plastic inner. Fiber reinforced plastic automotive food panel.   8. The outer bend introduction portion extending in the width direction on the outer body and extending in the width direction and having lower rigidity and / or strength than the front and rear portions is formed on the same line in the vehicle body width direction of the inner bend introduction portion. A food panel for automobiles made of fiber-reinforced plastic as described in 1.   9. The fiber reinforced plastic automobile hood panel according to claim 8, wherein the outer bending introduction portion extends substantially over the entire width of the outer body of the fiber reinforced plastic.   The fiber reinforced plastic automobile hood panel according to any one of claims 8 to 9, wherein the outer bending introduction portion is formed by partially reducing the thickness of the fiber reinforced plastic outer.   The inner bend introducing portion includes a plurality of reinforcing fiber layers, and the outer bend introducing portion is formed by partially changing the laminated structure of the reinforcing fiber layers constituting the fiber reinforced plastic outer. The fiber reinforced plastic automobile food panel according to any one of claims 8 to 10.   The fiber reinforced plastic automobile food panel according to any one of claims 8 to 11, wherein the outer bend introducing portion is formed by partially reducing the amount of reinforcing fibers constituting the fiber reinforced plastic outer. .   The outer bending introduction part is formed by disposing a discontinuous part of the reinforcing fiber by cutting a part of the reinforcing fiber constituting the outer made of fiber-reinforced plastic. A food panel for automobiles made of fiber-reinforced plastic as described in 1.   14. The outer bending introduction portion is formed by disposing different types of reinforcing fibers having lower rigidity and / or strength than other portions of the outer made of fiber-reinforced plastic. Fiber reinforced plastic automotive food panel.   The fiber reinforced plastic automobile food panel according to any one of claims 1 to 14, wherein the outer has a sandwich structure in which a core material is interposed between fiber reinforced plastic skin plates.   16. The fiber reinforced plastic automobile hood panel according to claim 15, wherein the outer bend introducing portion is formed by partially reducing the thickness of the core material.   The said reinforced fiber is a carbon fiber, The food panel for motor vehicles made from a fiber reinforced plastic in any one of Claims 1-16.

Images