JPS62255221A - Door construction of automobile - Google Patents

Abstract

PURPOSE:To improve resistance against an impact force by providing a skeleton between a door outer panel and a door inner panel, and connecting the inner flange of a front frame to a reinforcement at the front of said skeleton via a gusset member. CONSTITUTION:The subject door 1 is so constructed that a door outer panel 2 and a door inner panel 3 are connected to each other via a metal skeleton 6. This skeleton 6 is constituted by front and rear frames 7 and 8 extending vertically at the front and the rear ends of the door 1, a main reinforcement 9 extending fore and aft along the outer panel 2 at the middle of the door 1 and a side reinforcement 10 extending fore and aft along the outer panel 2 at the upper edge of the door panel. And the front end of the main reinforcement 9 is connected to the outer flange 7b of the front frame 7 and at the same time, to the inner flange 7a of said frame 7 via a gusset member 11.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an automobile door structure.

(Prior art) As an example of an automobile door structure, a door inner panel and a door outer panel are made of a plastic material, and a front frame and a rear frame extending vertically inside the panels are connected by reinforcements extending front and rear. It is known that a skeleton is provided (for example, JP-A-59-4
(See Publication No. 0939).

In the case of a door with such a skeleton structure, by obtaining the basic rigidity of the door with the skeleton, both the door inner and door outer panels can be used like decorative panels, thereby making it possible to reduce the weight of the entire door. becomes.

(Purpose of J! Akira) However, in the case of the conventional skeleton structure, if the window glass of the door is made to be able to be raised and lowered, it becomes necessary to make the reinforcement thinner to allow the glass to pass through, and the outer flange 6. This invention makes it difficult to ensure the surface strength of the door as it easily bends due to the lateral force from the door.
The present invention aims to solve this problem and provide a door structure with high impact resistance or flexibility against external forces.

(9! Light Structure) The automobile door structure of the present invention is such that a skeleton is provided between a door outer panel and a door inner panel, and this skeleton is arranged at the upper and lower parts of the front edge of the door and the rear edge of the door, respectively. The basic structure is that a front frame and a rear frame that extend in the front are connected by a reinforcement that extends in the front-rear direction along the door outer panel. Therefore, the front frame is a member having a U-shaped cross section with an inner flange and an outer flange extending rearward, and the rear side is open, and the inner flange of the front frame and the reinforcement are a gusset member on the front side of the door. It is characterized by being connected at.

That is, in the above door structure, the skeleton contributes to improving the surface strength of the door, and there is a passageway between the reinforcement provided along the door outer panel and the door inner panel that allows the door window glass to pass through. It becomes possible to secure the following. In this way, the reinforcement in the conventional skeleton is simply supported at both ends, but in the reinforcement of the present invention, the front part is rigidly (substantially) supported with respect to the front frame by the gusset member. The amount of deflection due to external lateral forces is significantly smaller than that of conventional reinforcements, and the external force is transferred to the vehicle body through the gusset member and the inner flange of the front frame. The reinforcement acts as an impact bar that increases impact resistance.

(Effects of the Invention) Therefore, according to the present invention, even if the skeleton reinforcement is made thin so that the door window glass can be raised and lowered, the deflection of this reinforcement due to external force can be suppressed, and the door It is possible to improve the strength or impact resistance, and it becomes possible to sufficiently secure the required strength without causing an excessive increase in weight.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the structure of an automobile door 1 shown in Fig. 1, the chain line 2 indicates a plastic door outer panel, 3 indicates a plastic door inner panel, and 4 indicates a plastic door inner panel.
5 is an elevating window glass, and 5 is a fixed triangular window glass provided in front of the elevating window glass 4, and a metal skeleton 6 is provided between the door outer and door inner panels 2.3, that is, inside.

The skeleton 6 includes a front frame 7 that extends vertically at the front edge of the door, a rear frame 8 that extends vertically at the rear edge of the door, and a main rain that extends back and forth along the door outer panel 2 at the center of the door panel. The door panel includes a forcement 9 and a side reinforcement 10 extending back and forth along the door outer panel 2 at the upper edge of the door panel. The front frame 7 is formed in a substantially U-shaped cross section with an open rear side, and thus includes an inner flange 7a and an outer flange 7b that respectively protrude rearward. The rear frame 8 is formed in a substantially U-shaped cross section with the upper part open on the front side, and a lower part continuing from the upper part is formed in a substantially U-shaped cross section without an inner flange.

The main reinforcement 9 has its front end joined to the outer flange 7b of the front frame 7, and also connects to the inner flange 7a of the front frame 7 via the gusset member 11 shown in FIG. joined to,
The rear end portion is connected to the rear frame 8. First, the rain reinforcement 9 is an outer plate 9 whose upper and lower edges are slightly bent inward, as shown in FIG.
An inner member 9b with a hat-shaped cross section is joined to the inner member 9b to form a closed cross-sectional structure, and an internal reinforcing member 9c with a hat-shaped cross section is provided inside the inner member 9b, and a reinforcing plate 9d is provided on the outside (inner surface of the inner member 9b). It is provided at an intermediate position in the front-rear direction as shown in FIG.

As shown in FIG. 4 showing the connection structure of the main reinforcement 9 to the front frame 7, the main reinforcement 9 has its outer plate 9a joined to the inner surface of the tip end of the outer flange 7b of the front frame 7. ,
The inner member 9b extends forward from the front end of the outer plate 9a, and the flange of the extended portion is joined to the inner surface of the outer flange 7b. On the other hand, each of the gusset members 11 has a substantially trapezoidal upper panel portion 11a.
and the under panel portion 11b, and both panel portions 11a, l.
It includes a back panel portion 11c that is continuous with the rear beveled edge of the lb. Further, on the front side of the door, a flange 11d protrudes outward from the bottom side of both the upper and amplifier panel parts 11a and 11b.

lie is the inner member 9 of the reinforcement 9
b (see Figure 5).

Further, flanges llf and llg that project upward and downward on the top sides of both panel portions 11a and llb are joined to the inner flange 7a of the front frame 7.

Furthermore, the flange ll on the top side of this gusset member 11
f and l1g are connected to the flange llh of the back panel portion 11c.

In addition, in FIG. 4, the front end of the door inner panel 3 is formed in a bent shape along the front surface of the front frame 7 and the front edge of the door outer panel 2, and the door inner panel 3 is formed in a bent shape along the front surface of the front frame 7 and the front edge of the door outer panel 2. It can be stopped. A pillar 12 of the vehicle body supports the door 1 with a hinge (not shown).
The rear side portion is located inside the inner flange 7a of the front frame 7.

On the other hand, the connection structure of the main reinforcement 9 to the rear frame 8 is shown in FIG.

First, the outer plate 9a of the main reinforcement 9 is joined to the inner surface of the tip end of the outer flange 8a of the rear frame 8, the inner member 9b is extended rearward than the outer plate 9a, and the flange of the extended portion is The flange 9d, which is joined to the outer flange 8a of the frame 8 and is bent inward at the extending end, is attached to the rear frame 8.
It is joined to the rear side plate portion 8b of. Furthermore, the inner member 9b has gusset plates 13 provided on both upper and lower sides thereof.
．． It is connected to the rear frame 8 via 14.

Next, the side reinforcement 10 includes an inner member 10a and an outer member 10 shown in FIGS. 7 and 8.
The flanges 7b are joined together to form a closed cross-sectional structure, and the front end portion is joined to the outer flange 7b of the front frame 7 as shown in FIG. Further, the rear end portion of this side reinforcement 10 is joined to the outer flange 8a of the rear frame 8 as shown in FIGS. It is joined to the side plate portion 8b. Further, in FIG. 7, the door outer panel 2 is provided with a downward hook 16 at its upper end, and during assembly, the hook 16 can be engaged with the upper flange LOe of the side reinforcement 10 to temporarily hold it. It looks like this.

Further, the triangular window glass 5 is joined to a triangular window sash 17 supported by the front frame 7 as shown in FIG. Both the main and side reinforcements 9,
10 (between the door inner panel 3). The frame member 18a is supported by the inner and outer flanges 7a*7b of the front frame 7 via a support bracket 20, as shown in FIG.

Therefore, in the case of the above door structure, the required strength of the door 1 is ensured by the skeleton 6, and by using both the door outer and door inner panels 2 and 3 like decorative panels and making them made of plastic, the weight of the door 1 can be reduced. can be achieved. That is, in the skeleton 6, both main and side reinforcements 9. The IO is made thin so that the elevating window glass 4 can be moved up and down. However, since the main reinforcement 9 is connected to the inner flange 7a of the front frame 7 via the gusset member 11, its front portion is substantially bent and has a rough rigid structure, so The amount of inward deflection is small, and the external force is the main reinforcement 9.
Gusset member 11, inner flange 7a of front frame 7
Since it can be received by the pillar 12 of the vehicle body via the door inner panel 3 and the seal member (not shown), the door is durable! Increased attack potential. In other words, the main reinforcement 9 not only functions as a strength member, but also as an impact bar, and even in relatively large doors such as a two-door passenger car, the main reinforcement 9 has the function of not only a strength member but also an impact bar. The required strength can be sufficiently secured without causing any damage.

In the above embodiment, both the door outer panel and the door inner panel are made of plastic, but they may also be made of metal plates. Even in that case, both panels can be made thin to ensure the required strength or impact resistance, while also ensuring space for raising and lowering the window glass.

Weight reduction can be achieved.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a front view of the internal structure of an automobile door seen from the inside; FIG. 2 is a perspective view of a gusset member; and FIG. 3 is a cross section taken along line AA in FIG. 1. Figure 4 is a BB sectional view of the 1st rjA, Figure 5 is a sectional view taken along the C--○ in Figure 4, Figure 6 is a DD sectional view of Figure 1, and Figure 7 is a sectional view taken along the line E in Figure 1. -E sectional view, Fig. 8 is a FF sectional view in Fig. 1, Fig. 9 is a G-arrow sectional view in Fig. 1, Fig. 10 is a HH sectional view in Fig. 1, and Fig. 11 is FIG. 2 is a sectional view taken along line II in FIG. 1; 1...Door, 2-...Door outer panel,
3... Door inner panel, 4... Elevating window glass, 6... Skeleton, 7...
Front frame, 7a... Inner flange, 7b.
...Outer flange, 8...Rear frame, 9"°゛゛゛Reinforcement 1...Gusset member. Fig. 7 Fig. 6 b Leather 10. (Method) % formula % Automotive door structure 3, relationship with the amended case Patent applicant address 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Name (313) Mazda Motor Corporation Representative Ken Yamamoto - 4 , Agent postal code 650 Address Asahi Seimei Sannomiya Building 6, 1-3-11 Sannomiya-cho, Chuo-ku, Kobe City, Hyogo Prefecture, Column 7 for a brief explanation of the drawings in the specification subject to amendment, No. 7 in the statement of contents of the amendment. Add "Figure" next to "No. 7" on the third line of page 12. that's all

Claims (1)

[Claims] (1) A skeleton is provided between the door outer panel and the door inner panel. A front frame having a letter shape, a rear frame extending vertically at the rear edge of the door, and a reinforcement extending longitudinally along the door outer panel and having a front end connected to the front frame and a rear end connected to the rear frame. A door structure for an automobile, characterized in that an inner flange of the front frame and a reinforcement are connected by a gusset member on the front side of the door.