JPS62241777A - Hood for vehicle - Google Patents

Abstract

PURPOSE:To improve quality, make a hood lightweight and shield noise radio waves by overlapping an inner plate member inside an outer plate member both made of an aluminum plate across a honeycomb core and fixing a V-shaped reinforcing member inside the inner plate member. CONSTITUTION:A hood 1 is formed into a plate structure having an outer plate member 2, an inner plate member 3 and a V-shaped reinforcing member 4. The outer plate member 2 is made of an aluminum plate and is formed into a square shape so as to constitute the outer profile of the hood 1. The inner plate member is also made of an aluminum plate and is overlappingly stuck to the inside of the outer plate member 2 via a honeycomb core 31. In addition, the reinforcing member 4 is fixed to the inside of the inner plate member 3 along a line connecting a striker fitting section 13 and a hinge fitting section 15. The reinforcing member 4 forms a hut-shaped cross section via an aluminum plate formed with flanges 42 outwardly along both side edges of a recess 41, and the flanges 42 are connected to the inside of the inner plate member 3 to form a closed cross section.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a technology for reducing the weight of a hood (lid) provided in an engine room or trunk room of an automobile.

(Prior art) As a conventional automobile hood, there is one example, JP-A-Sho Go-2.
The one described in Japanese Patent No. 19165 is known.

As a means of reducing the weight of automobiles, this conventional product is made by molding the automobile hood, which is generally rectangular in overall shape, from a plastic plate instead of a steel plate. The striker mounting part of the striker, which is one part of the hood lock device, is formed in the center of one edge of the plastic plate, and the peripheral rib along the plastic plate is formed in the center, and the striker attachment part of the striker is formed in the center of one edge of the plastic plate, and at both ends of the other edge opposite to said one edge. The hinge mounting structure consisted of integrally molded V-shaped ribs that protruded along the line connecting the parts.

(Problems to be Solved by the Invention) However, in the conventional product described above, as shown in FIG. There are dents (sink marks) 10 on the surface of the plastic plate 100 at certain points.
4 may occur, and if this occurs, it will be necessary to apply putty or the like during surface finishing to repair it.In order to prevent the above-mentioned dents 104, reducing the width of the ribs will allow sufficient In order to obtain reinforcement strength, it is necessary to increase the number of ribs, which causes the problem that it becomes difficult to cut out the mold during molding.

Also, when using a plastic plate formed by injection molding etc., when molding this plastic plate.

As shown in FIG. 9, voids 106 are generated and grow due to heating during coating on the plastic plate 1.
A problem arises in that a raised portion 110 is formed on the surface of 08.

Furthermore, plastic plates alone do not have the effect of shielding radio waves, so if a conventional product is used as a hood for the engine room, the noise radio waves emitted from the engine will pass through the hood and leak out of the car, causing There were also problems such as input into radios and computers, causing radio interference.

As mentioned above, conventional products have poor surface quality during molding.
A large amount of post-processing is required to repair this, and there are many problems such as the need to take measures to prevent radio wave interference, such as attaching a thin aluminum plate to the back side. Met.

(Means for Solving the Problems) The present invention has been made in order to solve the above-mentioned conventional problems, and for this purpose, the automobile hood of the present invention has a substantially rectangular overall shape. , an automobile hood in which the center of one edge is the part for attaching the striker of the hood locking device, and both ends of the other edge facing the one edge are the parts for attaching the hinge, forming the overall shape of the hood. The outer plate member is formed of an aluminum plate, and an inner plate member made of an aluminum plate is polymerized and bonded to the inner surface of the outer plate member with a honeycomb core interposed therebetween.

A V-shaped reinforcing member is fixed along a line connecting the striker mounting section and the hinge mounting section, and the V-shaped reinforcing member is formed with a hat-shaped cross section and is attached to the inner surface of the inner plate member. The structure is such that they are joined by forming a closed cross section between them.

(Function) In the automobile hood of the present invention, an inner plate member made of an aluminum plate is polymerized and bonded to the inner surface of an outer plate member made of an aluminum plate with a honeycomb core sandwiched therebetween, and a hat-shaped inner plate member made of an aluminum plate is further bonded to the inner surface of the inner plate member made of an aluminum plate. A plate structure is formed in which the V-shaped reinforcing member formed in the cross section is joined to the inner plate member along the line connecting the striker mounting part and the hinge mounting part to form a closed cross section.

Therefore, the aluminum plates that will become the outer plate member and the inner plate member are simply press-molded into predetermined shapes.

Furthermore, since the aluminum plate itself maintains its surface quality, this aluminum plate serves as the skin of the hood and maintains its surface quality.

Since the aluminum plate has a radio wave shielding effect, when the 29 is used as a hood for the engine room, it blocks noise and radio waves from the engine.

Further, since the aluminum plates forming the outer plate member and the inner plate member and the honeycomb core sandwiched between the outer plate member and the inner plate member are each made of lightweight materials, the overall weight of the hood is reduced.

In addition, in terms of strength, the 3-layer composite plate structure with a honeycomb core sandwiched between the outer plate member and the inner plate member reinforces almost the entire surface of the hood, and even if the hood is made lighter using lightweight materials, the hood will remain strong. Provides strong surface and tension rigidity. Furthermore,
A closed cross section is formed between the V-shaped reinforcing member with a hat-shaped cross section and the inner plate member, and the line connecting the striker mounting section and the hinge mounting section is reinforced, so the area where external force is applied is reinforced. This also prevents the hood from deforming.

Torsional and bending stiffness is provided.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In this embodiment, a hood provided in an engine room is taken as an example of an automobile hood.

The hood 1 of this embodiment has a plate structure mainly comprising an outer plate member 2, an inner plate member 3, and a V-shaped reinforcing member 4, and has an overall shape consisting of a front edge 11 and both side edges. 12
, 12 is formed into a substantially rectangular shape with notched corners, and the front and rear and left and right sides of 1 are slightly curved downward, and in the center of the front edge 11 is a striker, which is one part of the hood lock device. A striker attachment portion 13 is provided, and hinge attachment portions 15.15 are provided at both ends of the trailing edge portion 14.

The outer plate member 2 is made of an aluminum plate and is formed into a substantially rectangular shape to match the outer shape of the hood 1.

The inner plate member 3 is formed of an aluminum plate, and is polymerized and bonded to the inner surface of the outer plate member 2 with a honeycomb core 31 interposed therebetween.

The honeycomb core 31 is made by impregnating a paper honeycomb formed into a honeycomb shape with a phenol resin, and a hard polyurethane highly foamed foam 32 inside the core.
is filled. In this case, the inner plate member 3 has a shallow recess 3 formed at the same depth as the height of the honeycomb core 31.
A flange portion 34 is formed on the periphery of the outer plate member 3, and this flange portion 34 is hemmed to the periphery of the outer plate member 2.

When molding, the outer plate member 2 and the inner plate member 3 are press-molded into predetermined shapes.

Next, a foaming solution is injected into the shallow recess 33 of the inner plate member 3, and then the honeycomb core 31 is inserted, and the outer plate member 2 is stacked on top of it and pressurized, and the peripheral edge is hemmed and joined. Put it in the oven and heat it up.

Therefore, by this forming, the peripheral edge of the outer plate member 2 and the peripheral edge of the inner plate member 3 are hemmed together, and at the same time, inside the closed cross-sectional space formed between the outer plate member 2 and the inner plate member 3 by the shallow recess 33. A honeycomb core 31 is inserted into the honeycomb core 31, and the inside of the core of the honeycomb core 31 is filled with a foam 32, and the upper and lower surfaces of the honeycomb core 32 are attached to the outer plate member 2 and the inner plate member, respectively, using the foam 32 as an adhesive. It is glued to 3.

Further, a recess 35 is formed in the center of the inner surface of the inner plate member 3, and this recess 35 corresponds to the upward protrusion 351 formed in the center of the inner plate member 3. A notch 311 is formed in the central portion of the honeycomb core 31, and is formed by abutting the upper surface of the upward protrusion 351 with the inner surface of the outer plate member 2.

The four portions 35 serve as an escape space when there is insufficient clearance between the inner surface of the inner plate member 3 and a component in the engine room, such as an air cleaner.

The V-shaped reinforcing member 4 is provided on the inner surface of the inner plate member 3.

The striker mounting portion 13 is fixed along a line connecting the hinge mounting portion 15°.

This V-shaped reinforcing member 4 has flanges 42 extending outward along both side edges of the recess 41 . 42 is formed into a hat-shaped cross section by an aluminum plate, and the flange 42.42 is spot welded to the inner surface of the inner plate member 3 to form a closed cross section with the inner plate member 3 and join. has been done.

Further, a large number of circular bead parts 43 are formed in the recessed part 41 of this V-shaped reinforcing member 4, and holes 431 are formed inside the circular bead parts 43. While reinforcing the member 4 itself, the holes 431 are used to reduce the weight. Reference numeral 44 denotes a cross-section changing portion, which reduces the cross-section of the V-shaped reinforcing member 4, and when an excessive load is input to the hood 1 from the front due to a collision or the like, the hood 1 changes from the cross-sectional changing portion 44. A weak part was created to prevent the rear end from breaking and moving toward the passenger compartment.

Further, 5 denotes a striker, which is made of steel and has a hanging part 51 bent at the center part, and the striker is attached at part 13 to a V-shaped reinforcing member 4.
attached to the front end of the

In this case, the mounting structure is such that a hole 52 is formed in the V-shaped reinforcing member 4 to mount the striker, and an aluminum plate 54 having a hole 53 corresponding to the hole 52 is spotted on the inner surface of the V-shaped reinforcing member 4. Welded and attached, a steel plate 56 having a hole 55 corresponding to the hole 52 is riveted to the inner surface of the aluminum plate 54, and the striker 5 is attached to the hook 5.
1 is attached through holes 53 and 55 and is welded to the inner surface of the steel plate 56 so as to protrude from the hole 52.

Therefore, in terms of structure, the striker 5 can be attached by welding between the steel striker 5 and the steel plate 56, and the closed cross-sectional space created by the V-shaped reinforcing member 4 and the inner plate member 3 can be effectively used. Can be installed using

Further, the hinge mounting plate 6 is formed of an aluminum plate, and the hinge mounting nut 61.61 is attached to the hinge mounting portion 15.15.

The V-shaped reinforcing member 4 has a hinge mounting hole 662.62, and the hinge mounting nut 61.61 is aligned with the hole 62.62, and the hinge mounting plate 6 is attached to the V-shaped reinforcing member. The mounting spot welded to the inner surface of 4 is a structure.

Therefore, in terms of the hinge mounting structure, the plate 6 can be mounted by effectively utilizing the closed cross-sectional space formed by the V-shaped reinforcing member 4 and the inner plate member 3.

Reference numeral 7 denotes a rear edge reinforcing member, which is fixed to the inner surface of the inner plate member 3 along the rear edge of the hood 1 with a hinge attached extending between portions 15.

This trailing edge reinforcing member 7 is integrally formed with the V-shaped reinforcing member 4 between the trailing ends of the V-shaped reinforcing member 4, and
Similar to the character-shaped reinforcing member 4, it is formed in a 1-shaped cross section with flanges 72 and 73 facing outward along the front and rear edges of the recess 71, and the front edge flange 72 is formed on the inner surface of the inner plate member 3. At the same time, the trailing edge flange 73 is hemmed to the rear edge of the outer plate member 2 together with the rear edge of the inner plate member 3 to form a closed cross section with the inner plate member 3. .

A front edge reinforcing member 8 is fixed to the inner surface of the inner plate member 3 along the front edge of the hood 1.

This front edge reinforcing member 8 is integrally molded with the V-shaped reinforcing member 4 at the front end of the V-shaped reinforcing member 4, and, like the V-shaped reinforcing member 4, extends along the front and rear edges of the recess 81. formed in a hat-shaped cross section with outwardly directed flanges 82,83;
The rear edge flange 82 is spot welded to the inner surface of the inner plate member 3, and the leading edge flange 83 is hemmed to the front edge of the outer plate member 2 together with the front edge of the inner plate member 3, so that They are joined to form a closed cross section between them.

Next, the operation of this embodiment will be explained.

The hood 1 of this embodiment has an outer plate member 2 made of an aluminum plate.
The inner plate member 3, the honeycomb core 31, the V-shaped reinforcing member 4 made of an aluminum plate, and the front and rear edge reinforcing members 7.8 are the constituent members, and since each of these constituent members is lightweight, its overall weight is becomes lighter.

Furthermore, even if the weight is reduced by using lightweight materials, the entire surface of the hood 1 is reinforced by the three-layer composite plate structure in which the honeycomb core 31 is sandwiched between the outer plate member 2 and the inner plate member 3. A product with strong surface rigidity and tensile rigidity is obtained, and the surface does not become dented or sticky due to vibrations, etc. Also, the striker is attached to the part 13 where external force is applied by the V-shaped reinforcing member 4 having a hat-shaped cross section and forming a closed cross section with the inner plate member 3.
The hinge mounting is reinforced on the line connecting part 15.15,
It prevents deformation of the hood and provides torsional and bending stiffness.

Further, the trailing edge reinforcing member 7 reinforces the trailing edge of the hood 1 and provides torsional and bending rigidity in the left-right direction, and the leading edge reinforcing member 8 reinforces the leading edge of the hood 1 in the same way as the trailing edge. Ru.

Further, the aluminum plate forming the outer plate member 2 forms an oval skin of the hood 1, and the surface quality of the hood 1 is maintained by this aluminum plate, and the aluminum plate of the inner plate member 3 has a radio wave shielding effect. It blocks noise radio waves from the engine and prevents them from leaking from the engine room.

Next, other embodiments shown in FIGS. 6 and 7 will be described.

FIG. 6 shows an example in which the inner plate member 3 is polymerized and bonded to the inner surface of the outer plate member 2 using adhesive tapes 92 and 93 with an aluminum honeycomb core 91 in between. Adhesive tapes 92 and 93 are interposed between the inner plate member 3 and the honeycomb core 91 and between the inner plate member 3 and the honeycomb core 91, respectively, and pressure is applied to bond them.

Further, FIG. 7 shows that a soft urethane foam 95 is filled into the core of a honeycomb core 94 in advance, and in this state, both sides of the soft urethane foam 95 are impregnated with an adhesive, and this honeycomb core 94 is sandwiched between them. After pressurizing the outer plate member 2 and the inner plate member 3, they are heated in an oven and bonded together.

In this case, the V-shaped reinforcing member, the trailing edge reinforcing member, and the leading edge reinforcing member are joined to the inner plate member in advance.

The embodiments of the present invention have been described above with reference to the drawings.

The specific configuration of the present invention is not limited to the above-mentioned embodiments, and the present invention includes any design changes that do not depart from the gist of the invention.

For example, in the embodiment, a hood for an engine room is taken as an example, but the structure of the present invention can also be applied to a hood (lid) for a trunk room, etc.

(Effects of the Invention) As explained above, the automobile hood of the present invention includes an outer plate member made of an aluminum plate, and an inner inner plate made of an aluminum plate sandwiching and polymerizing a honeycomb core on the inner surface of the outer plate member. The plate structure consists of a plate member and a V-shaped reinforcing member made of an aluminum plate fixed to the inner surface of the inner plate member, which reduces the overall weight while improving bending, torsional, surface, and tension rigidity. A strong hood is obtained.

In addition, since the outer plate member, which is the skin of the hood, is made of aluminum plate, the surface quality can be maintained by itself, and there is no need to repair the surface in post-processing as in the past. Since the aluminum plate is used, noise radio waves from the engine can be shielded, so there is no need to take separate measures against radio interference.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway inner view showing a hood according to an embodiment of the present invention;
Figure 2 is a cross-sectional view of Figure 1 1-1, Figure 3 is a cross-sectional view of Figure 1 ■-■, Figure 4 is a cross-sectional view of Figure 1 ■-■, and Figure 5 is a cross-sectional view of Figure 1 I.
A V-rV sectional view, FIGS. 6 and 7 are sectional views showing other embodiments, and FIGS. 8 and 9 are explanatory views of the prior art. 1: Hood 2: Outer plate member 3: Inner plate member 4: V-shaped reinforcing member 11: Front edge (one edge) 13. Striker attachment part 14: Rear edge (other line part) 15: Hinge attachment Part 31: Honeycomb core

Claims (1)

[Scope of Claims] 1) The overall shape is substantially rectangular, the center of one edge is a striker attachment part of the hood lock device, and both ends of the other edge opposite to the one edge are hinge attachment parts. In the automobile hood described above, an outer plate member forming the overall shape of the hood is formed of an aluminum plate, and an inner plate member made of an aluminum plate is polymerized and bonded to the inner surface of the outer plate member with a honeycomb core interposed therebetween. A V-shaped reinforcing member is fixed to the inner surface of the inner plate member along a line connecting the striker mounting portion and the hinge mounting portion, and the V-shaped reinforcing member is formed with a hat-shaped cross section and is attached to the inner plate member. A hood for an automobile, characterized in that the hood is joined to the inner plate member on the inner surface to form a closed cross section.