JPH0356461Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a vehicle opening/closing body such as a vehicle hood.

[Technical background and problems] As a conventional vehicle opening/closing body, for example,
There is a device as shown in FIG. 6 described in Japanese Patent No. 107679. This is a vehicle hood as an example of a vehicle opening/closing body, and is shown after the hood has been bent due to a head-on collision or the like. In this vehicle hood, the hood inner 101 and the hood outer 103 are made of steel plates, and the hood inner 101 is provided with a converging portion 105 at an intermediate portion in the longitudinal direction of the vehicle. Then, due to a head-on collision of a vehicle, etc.
When a load is applied in the longitudinal direction of the vehicle, stress concentrates on this constricted portion 105 and first the hood inner 1
01 is bent back and forth, and then the entire hood is bent as shown in FIG. 6 to absorb and relieve the impact load.

Incidentally, in recent years, it has been desired to apply resin materials to vehicle hoods in order to reduce the weight of vehicle bodies and to prevent rust.

For example, it is conceivable to mold the hood from a resin material into a matching plate shape.

In this case, the hood molded from a resin material is molded as thin as possible without sacrificing weight reduction, but if the resin-molded hood is made into a thin plate, the so-called tension rigidity of the hood decreases, and the central part of the hood tends to deform vertically. Become. This can be done by providing tension and stiffness reinforcing ribs on the back of the central part of the hood, but on the other hand, as mentioned above, when the hood receives a load in the front-rear direction, the ribs restrict the bending of the hood, and the bending part of the hood is It becomes inconsistent. Therefore, it may become difficult to set the amount of energy absorbed by the bending of the hood.

To solve this problem, for example, as shown in FIG. 7, a notch 111 is provided in the tension and stiffness reinforcing rib 109 that is integrally molded with the main body 107 on the back surface of the central part of the resin-molded hood main body 107.
When a load is applied in the longitudinal direction, the notch 1
11, the bending of the rib 109 at the notch 111 is promoted, and the hood can be bent at a constant position. In other words, when a large load is applied in the longitudinal direction of the vehicle due to a head-on collision, etc., the rib 109
The stress is concentrated on the notch 111 of the rib 1.
09 is bent in the front-rear direction with the notch 111 as a boundary, and the hood 107 is bent due to the bending of the rib 109, and can absorb energy.

However, in this case, since the notch 111 is provided in the rib 109, there is a risk that deformation of the hood may easily occur at the notch 111. That is, as shown in FIG. 8, when the hood main body 107 is to be closed, a moment M is applied around the hinge 113, and a portion of the hood 107 with low rigidity, that is, the notch 111, is moved as shown by the chain line. There was a risk that it would deform. In addition, when such deformation occurs, the striker 115 attached to the front end of the hood 107 may become misaligned with respect to the locking device 117 at the front end of the vehicle body, making it difficult to close the hood lock. Similarly, in the type with the gas stay 119 as shown in Figure 9, a moment M is applied to the front of the gas stay 119, and the notch 111, where the hood has low rigidity, deforms as shown by the chain line, making it difficult to close the hood lock. There is a possibility that this will happen.

[Purpose of the invention] This invention was devised in view of the above-mentioned problems, and by constructing the vehicle opening/closing body with resin material, it meets the demands for weight reduction and rust prevention, and achieves tension rigidity. It is possible to hold it for as long as possible and bend it at a nearly constant position when absorbing energy, and it is also possible to set the amount of energy absorption more reliably, and it is also possible to suppress deformation when opening and closing. The purpose is to provide opening/closing bodies for vehicles.

[Structure of the device] In order to achieve the above object, this device is an opening/closing body for a vehicle that closes an opening at the front or rear of the vehicle body. A rib for reinforcing tension and rigidity is provided that extends in the longitudinal direction of the vehicle body, and a notch portion that concentrates the load acting from the longitudinal direction of the vehicle on the intermediate portion of the rib in the longitudinal direction of the vehicle body to promote bending of the main body in the longitudinal direction of the vehicle. are provided with opposing faces that guide the bent portion on the outer edge side in the longitudinal direction of the vehicle to move above the bent portion on the inner edge side when the main body is bent based on the notch portion due to a load acting from the longitudinal direction of the vehicle. The cutout portion is characterized in that adjacent inclined surfaces are provided in the notch portion.

[Example] Hereinafter, an example of this invention will be described based on FIGS. 1 to 3.

FIG. 1 is a rear view of a vehicle hood that can open and close the upper opening of the engine room at the front of the vehicle body (not shown) as an example of a vehicle opening/closing body, and FIG. 2 is a perspective view of the main parts of the vehicle. Hood 1 is SMC
The main body 3 is formed into a single thin plate made of resin or the like. Therefore, this vehicle hood 1 can be significantly reduced in weight compared to conventional vehicle hoods formed of steel plates consisting of an outer member and an inner member, and has an advantageous structure in terms of rust prevention. There is.

A rib 5 for reinforcing tension and rigidity is integrally molded with the main body 3 from SMC resin so as to cross the back surface of the central part of the main body 3 in the longitudinal direction of the vehicle.
The main body 3, which is made of resin and molded into a thin plate, is configured to ensure tensile rigidity, which decreases particularly in the central portion. The ribs 5 are tapered toward the front of the vehicle as a whole when the main body 3 is viewed from the back side as shown in FIG. A substantially trapezoidal frame portion 7 consisting of
A substantially cross-shaped beam portion 9 consisting of a horizontal piece portion 9a extending in the vehicle width direction and a vertical piece portion 9b intersecting the horizontal piece portion 9a extends over the inside of the cross-section.

The rib 5 is provided with a slit-shaped notch 11 at an intermediate portion of the main body 3 in the longitudinal direction of the vehicle. The cutout portions 11 are provided in a line in the vehicle width direction at the front side of the vehicle from the horizontal piece portion 9a, that is, approximately at the center of the main body 3 in the vehicle longitudinal direction. Therefore, this notch portion 11 is configured to concentrate the load acting from the longitudinal direction of the vehicle, thereby promoting bending of the main body 3 in the longitudinal direction of the vehicle. The cutout portion 11 also connects the left and right oblique sides 7c, 7d of the frame portion 7 and the lower side (upper side in FIG. 2) of the vertical piece portion 9b of the beam portion 9 to the upper side (lower side in FIG. 2, that is, the main body 3). side) and is inclined toward the front in the longitudinal direction of the vehicle.
Therefore, guide surfaces 11a and 11b as inclined surfaces are formed in the notch portion 11, and these guide surfaces 11a and 11b are formed as inclined surfaces.
11b is configured so that when the main body 3 bends, the outer edge in the longitudinal direction of the vehicle, that is, the bent portion on the front side of the vehicle, moves to the inner edge, that is, the upper side of the bent portion on the windshield side, which is the rear side. There is. Furthermore, the guide surfaces 11a and 11b are as shown in FIG.
They are located close to each other, facing each other.

Note that 13 is a hinge fixed to the windshield 15 side of the main body 3 and rotatably supports the main body 3.

Next, the operation of the above embodiment will be described.

When a load is applied to the vehicle hood 1 in the longitudinal direction of the vehicle body due to a frontal collision or the like, the rib 5 is accelerated to bend longitudinally at the notch 11 .

In this case, when the collision is minor, the load in the longitudinal direction of the vehicle body is also small, and even if this minor load is concentrated on the left and right oblique sides 7c and 7d of the rib 5 and the notch 11 between the front and rear of the vertical piece 9b, , the main body 3 does not break, and a bending force acts on the notch 11 in the front-back direction. Therefore, the rib 5 bends in the front and back of the vehicle with the notch 11 as a boundary, and due to the bending of the rib 5, the main body 3 also bends in the front and back of the vehicle with substantially the same point as the border, and the entire vehicle hood 1 is bent. Since the load is light, the bending of the vehicle hood 1 is within the range of elastic deformation, and this elastic deformation absorbs and relieves the collision energy. Therefore, it is possible to improve the safety of the occupants and reduce damage to the other vehicle.

Furthermore, if the collision is sudden, the load acting on the vehicle hood 1 in the longitudinal direction will be large, and the main body 3 and the ribs 5 will bend significantly at the notch 11 where stress concentration occurs, and the main body 3 will eventually become the third Cut as shown. Therefore, due to the elastic deformation and cutting of the main body 3, the collision energy is sufficiently absorbed and alleviated, and similarly to the above, it is possible to improve the safety of the occupants and reduce damage to the other vehicle. Furthermore, since the vehicle hood 1 can be bent at approximately constant locations, the amount of absorbed energy can be easily set. Further, when the notch 11 of the rib 5 and the main body 3 are cut, the bent portion 3a on the front side of the vehicle as the cut outer edge side of the vehicle is cut on the guide surface 1.
1a and 11b, it is moved in the P direction shown in FIG. 3, which is above the bent portion 3b on the rear side. Then, the bent portion 3a that has moved in the P direction is guided toward the outside of the vehicle interior by the settings of the guide surfaces 11a and 11b and the settings of the vehicle longitudinal position of the notch portion 11. Therefore, the bending portion 3b will not collide with other members and its movement will not be restricted, and the collision energy will be absorbed and alleviated substantially as set. Moreover, Figure 8,
When the vehicle hood 1 is closed in the same manner as shown in FIG. 9, the main body 3 tends to bend at the notch 11 due to the action of the moment in the same manner as explained in FIGS. guide surface 11a,
11b comes into contact, and bending of the main body 3 is suppressed. Therefore, the food lock can be operated reliably.

On the other hand, since the ribs 5 maintain the tensile rigidity of the main body 3 during normal use, the rigidity of the main body 3 is improved and it is possible to make the main body 3 thinner.

4 and 5 show other embodiments of this invention, FIG. 4 is a rear view of the vehicle hood 17;
FIG. 5 is a perspective view of the same essential parts, and the structure of the notch 21 provided in the rib 19 is different from that of the above embodiment. That is, the notch portion 21 is connected to the beam portion 2.
They are provided in a row in the axle direction on both the left and right oblique sides 25c, 25d of the frame 25 and the vertical piece 23b on the vehicle front side of the horizontal piece 23a of No. 3. This notch 2
1 is the left and right oblique sides 25c and 25d of the frame portion 25 and the vertical piece portion 23 of the beam portion 23, as in the above embodiment.
The lower side of b (the upper side in FIG. 5) is inclined toward the front in the longitudinal direction of the vehicle body with respect to the upper side (lower side in FIG. 5, that is, the main body 3 side). Guide pieces 27a and 27b are provided on both sides in the same direction as the inclination direction of the notch 21. Therefore, the guide surface 21 as an inclined surface that is close to and faces each other between the notch 21 and the guide pieces 27a and 27b.
a, 21b are formed. Also in this embodiment, when the vehicle hood 17 is cut from the notch 21, the front bent portion 17a is guided by the guide surfaces 21a and 21b and is moved above the rear bent portion 17b. . Therefore,
Similar to the above embodiment, the vehicle hood 17 can be bent at a substantially constant point, and the cut bent portion 17a can be moved in the direction P shown in FIG. 3, so that substantially the same effect can be expected. . Moreover, the guide surfaces 21a and 21b are the same as the guide piece 2.
7a and 27b, the guiding action of the guiding surfaces 21a and 21b can be reliably stabilized. Furthermore, guide pieces 27a, 27
Due to mutual contact between the guide surfaces 21a and 21b of b, deformation of the main body 3 can be suppressed in the same manner as in the above embodiment.

Note that this invention is not limited to the above-mentioned embodiment. For example, the guide portion may be configured separately from the notch portion, or may be configured by providing guide pieces on both left and right sides of the notch portion in the vehicle width direction as shown in FIG. This invention can also be applied to trunk lids.

[Effects of the invention] As is clear from the above explanation, according to the structure of this invention, the main body is molded from resin, and a rib for reinforcing tension and rigidity is provided in the center, so that the structure of this invention can be achieved while maintaining tension and rigidity. The entire structure can be constructed as a thin resin plate, which is extremely advantageous for weight reduction and rust prevention. In addition, a notch is provided in the middle part of the rib in the front-rear direction to promote the bending of the rib back and forth, so that the entire vehicle opening/closing body can be bent back and forth at the notch due to loads in the front-rear direction. This allows the bending portion to be approximately constant, and it is easy to set the amount of energy absorbed by the bending. Moreover, due to the action of the inclined surface, when the main body is cut at the notch, the bent part on the outer edge of the vehicle can be moved above the bent part on the inner side, so that the movement of the bent part is restricted when energy is absorbed. Therefore, the energy absorption amount can be set more reliably. Furthermore, when the main body is closed, the main body tends to deform at the notch due to the action of moment, but the closely opposing inclined surfaces abut each other at the notch, suppressing the deformation of the main body. .

[Brief explanation of drawings]

FIG. 1 is an overall rear view of a vehicle hood according to an embodiment of the invention, FIG. 2 is an enlarged perspective view of the main parts,
Fig. 3 is an explanatory view of the operation, Fig. 4 is an overall rear view of a vehicle hood according to another embodiment, Fig. 5 is an enlarged perspective view of the same essential parts, and Fig. 6 is a side view of the conventional example in its operating state. ,
FIG. 7 is an enlarged perspective view of the main parts of a possible vehicle hood, and FIGS. 8 and 9 are explanatory views of the same operation. Explanation of the symbols representing the main parts of the drawing. 1... Vehicle hood (vehicle opening/closing body), 3... Main body, 5,
19... Rib, 11, 21... Notch, 11
a, 11b, 21a, 21b...Guide surface (slanted surface).

Claims (1)

[Scope of utility model registration request] In a vehicle opening/closing body that closes an opening at the front or rear of a vehicle, the main body is molded from resin, and a rib for tension and rigidity reinforcement is provided that extends in the longitudinal direction of the vehicle body so as to cross the central portion of the main body in the longitudinal direction of the vehicle body. A notch part is provided in the middle part of the rib in the longitudinal direction of the vehicle body to concentrate the load acting from the longitudinal direction of the vehicle and promote bending of the main body in the longitudinal direction of the vehicle body, and the cutout part of the main body due to the load acting from the longitudinal direction of the vehicle is provided. The notch is characterized by being provided with inclined surfaces facing each other and adjacent to each other to guide the bent portion on the outer edge side in the longitudinal direction of the vehicle to move above the bent portion on the inner edge side when bending based on the notch portion. Opening/closing body for vehicles.