JP2003048430A - Method of manufacturing inner panel of vehicle door and inner panel of vehicle door - Google Patents

Abstract

(57) [Problem] To provide a vehicle door in which an outer panel and a door trim are mounted on a mounting frame and an inner panel covers an opening of the mounting frame, the rigid, lightweight and inexpensive inner panel is provided. I will provide a. SOLUTION: In a press forming step (S1), an opening 3 of a mounting frame 3 is formed by press forming a steel plate.
1 is formed, and an inner panel steel plate portion 50 which is a steel plate stamped out from the opening 31 is obtained. At this time, the protrusion-prevention shape 59 provided at the concave / convex portion on the inner side of the inner panel steel plate portion 50 and the connection portion with the mounting seat surface 60 is also formed. Next, in the injection molding step (S2), a mounting seat surface 60 for mounting the inner panel steel plate portion 50 to the mounting frame 3 is formed on the peripheral edge portion of the inner panel steel plate portion 50 with resin. At this time, a door functional component mounting portion for mounting a door functional component is also formed inside the inner panel steel plate portion 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door inner panel manufacturing method and a vehicle door inner panel.

[0002]

2. Description of the Related Art FIG. 15 is a perspective view of a vehicle door 100 according to a conventional technique. This figure shows the door trim 102.
It shows a state where (described later) is not assembled. 16 is a cross-sectional view of the vehicle door 100.

As shown in FIG. 15, an outer panel 101, an inner panel 103 and a mounting frame 104 are assembled to a vehicle door 100. In FIG. 15, the inner shape of the inner panel 103 is omitted.

As shown in FIG. 16, a vehicle door 100.
Is the inner panel 1 between the outer panel 101 located outside the vehicle and the door trim 102 located inside the vehicle.
03 is provided. Furthermore, this outer panel 10
1 and door trim 102 mounting frame body 10
4 are provided. The inner panel 103 is attached to the mounting frame body 104 so as to cover the opening 105 provided in the mounting frame body 104.

Therefore, as shown in FIG. 15, the inner panel 103 has an opening 105 formed in the mounting frame 104.
It has a shape slightly larger than that of the mounting frame 104.
Has a mounting hole 106 for mounting on the periphery.

Further, as shown in FIG. 16, the inner panel 103 is provided with various parts as a power window device 10.
7, electric components such as a motor 109 for raising and lowering a power window, a speaker, a door lock device, door functional components such as wiring such as a wire harness 108 for connecting them, and door constituent components such as a door pocket for storage. It is installed (see FIG. 2 which is an explanatory view of the present invention).

The inner panel 103 is provided with a large number of holes such as mounting holes for mounting the above-mentioned various parts and working holes for assembling work. Further, the inner panel 103 is provided with a deep recess for forming the depth of the door pocket and a mounting seat surface with complicated unevenness for mounting various parts (FIG. 2 which is an explanatory view of the present invention).
And FIG. 7).

By providing such an inner panel 103, various parts to be assembled inside the vehicle door 100 can be assembled while being mounted on the inner panel 103, so that the vehicle door 100 is assembled. Excellent workability for attachment.

At the same time, since the inner panel 103 is a door constituent member, it needs to have an appropriate strength, and it must also have a structure for cushioning a side impact.

For the above reasons, the inner panel has a very complicated shape.

Heretofore, as such an inner panel, a steel plate inner panel formed by press forming a steel plate or a resin inner panel integrally made of resin for weight reduction has been used. .

[0012]

However, in the above-mentioned conventional steel plate inner panel, since it has a shape slightly larger than the opening of the mounting frame and the entire surface is made of steel plate, it becomes considerably heavy, The work at the time of attachment was difficult. Furthermore, it is necessary to press-form the inner panel mounting surface with high surface accuracy in accordance with the mounting surface of the mounting frame body, resulting in high cost. Further, when it is necessary to form a complicated uneven portion or a deep cover shape that is difficult to form by press molding, it is necessary to form a resin part on the inner panel in a separate process.

On the other hand, although the conventional resin inner panel is lightweight, it is very large in size because it covers the entire opening of the mounting frame, so an injection molding machine with a large mold closing force is required. The molding cost was high. Further, since it is necessary to take measures against molding shrinkage and thermal expansion and to increase the mechanical strength, it is necessary to use a high grade resin such as a glass fiber reinforced resin, resulting in a high material cost. Furthermore, it is necessary to increase the rigidity by means of reinforcing ribs, etc., which further increases the material cost.

The present invention has been made to solve the above problems, and an object thereof is to provide an inner panel which is rigid, lightweight and inexpensive, and a method for manufacturing the same.

[0015]

In order to solve the above-mentioned problems, a method for manufacturing an inner panel for a vehicle door according to the present invention has a mounting frame body attached to an outer panel outside the vehicle, and an opening of the mounting frame body. A method of manufacturing an inner panel for a vehicle door, which covers a portion and is attached to the mounting frame body, by press-forming a steel plate to form an opening portion of the mounting frame body, and steel punched out from the opening portion. A press forming process to obtain an inner panel steel plate part that is a metal plate, and an inner panel mounting part for mounting the inner panel steel plate part to the mounting frame body is formed of resin on a peripheral portion of the inner panel steel plate part. And a resin molding step to perform.

According to the above-mentioned method, the steel plate piece punched out from the opening of the mounting frame body generated when the mounting frame body is press-formed from the steel plate is formed as the inner panel steel plate portion. Therefore, the steel plate piece in the opening of the mounting frame that occurs during press forming can be used as the inner panel steel plate portion without waste, and the material cost is reduced compared to the conventional steel plate inner panel. it can.

Further, an inner panel mounting portion for mounting to the mounting frame is formed of resin on the peripheral portion of the inner panel steel plate portion. Therefore, unlike the conventional steel sheet inner panel, the shape of the inner panel mounting surface does not need to have high surface accuracy during press molding in accordance with the mounting surface of the mounting frame, so the cost of the press molding process can be reduced. Can be lowered.

Further, since the inner panel steel plate occupies most of the inner panel, the resin portion is much smaller than the resin inner panel. Therefore, for example, when the resin portion is formed by injection molding, the injection projection area is significantly reduced, so that an injection molding machine or the like having a large mold closing force is not required, and the molding cost can be suppressed.

Further, since it is not necessary to take measures against molding shrinkage and thermal expansion, and the mechanical strength can be secured by the inner panel steel plate portion made of steel plate which occupies most of the inner panel, it is necessary to use expensive resin. Instead, the material cost can be reduced.

Further, in contrast to the conventional steel plate inner panel,
By making the inner panel mounting part of the inner panel made of resin, it is possible to reduce the weight and reduce the difficulty during assembly work. In addition, the degree of freedom in designing the inner panel mounting part is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcement ribs. The adjustment is much easier in design than the adjustment in molding.

Further, since the inner panel steel plate made of steel plate is used for most of the inner panel, rigidity and dimensional accuracy can be secured as compared with the conventional resin inner panel.

The resin inner panel mounting portion for mounting the inner panel to the mounting frame can have various shapes. For example, it may have a mounting portion having a fixed width and extending from the entire outer circumference of the inner panel steel plate portion, and having a mounting hole corresponding to the mounting hole of the mounting frame body. Further, the resin inner panel mounting portion may be formed only around the mounting hole corresponding to the mounting hole of the mounting frame. Furthermore, the mounting portion of the resin inner panel mounting portion may be substantially flush with the mounting portion,
Depending on the shape and height of the mounting surface of the mounting frame, the seat height of the mounting portion, that is, the thickness of the mounting portion may be changed, or the mounting portion may be inclined.

The resin molding process is not limited to injection molding, but may be injection molding, foam molding, compression molding, or the like.

Furthermore, the method for manufacturing an inner panel for a vehicle door according to the present invention is characterized in that the shape of the inner portion of the inner panel steel plate is formed in the press forming step.

According to the above method, the mounting frame body and the shape of the inner portion of the inner panel steel plate can be simultaneously press-formed in the same press-forming step, so that the press-forming steps can be integrated and processed. The cost can be reduced significantly.

Further, in the method for manufacturing an inner panel for a vehicle door according to the present invention, in the resin molding step, a door for attaching a door functional component of the vehicle door to an inner portion of the inner panel steel plate portion. The feature is that a functional component mounting portion is formed.

According to the above-described method, the resin functional door mounting portion can be simultaneously formed in the inner portion of the inner panel steel plate in the resin forming step, so that no extra forming step is required. Further, at this time, it becomes possible to simultaneously form a complicated uneven portion or a deep cover shape, which is difficult to form by press molding, with resin. In the resin molding process, resin door components may be provided at the same time.

Here, the door functional component is a component which is mounted on the inner panel via a mounting portion such as a mounting seat, and examples thereof include a glass lifting rail, a power window lifting motor, a speaker, a handle lever, and a harness. . On the other hand, the door component is a component directly attached to the inner panel, and includes a cover, a bracket, a waterproof cover and the like.

Further, in the method for manufacturing an inner panel for a vehicle door according to the present invention, when the inner panel is attached to the mounting frame, the inner panel completely covers the opening of the mounting frame. In the resin molding step, a cover portion extending from a peripheral edge portion of the inner panel steel plate portion is formed.

According to the above method, the cover portion that covers the opening formed between the inner panel and the opening portion of the mounting frame is formed of resin by extending from the peripheral edge of the inner panel steel plate. The mounting frame body and the inner panel steel plate portion can be partially overlapped and mounted. This means that the inner panel steel plate portion is displaced from the original position of the opening portion of the mounting frame body, rotated, or turned over to mount the inner panel to the mounting frame body. As a result, a strong connection can be obtained by connecting the steel plates to each other at the overlapping portion, and it is possible to selectively improve the strength with respect to the site where high stress occurs.

When the inner panel and the mounting frame are attached to each other using the mounting holes of the inner panel and the inner panel, the inner panel steel and the mounting frame may be brought into direct contact with each other. You may attach via the resin seat surface formed in.

In order to solve the above-mentioned problems, the inner panel of the vehicle door of the present invention has a mounting frame body attached to the outer panel outside the vehicle, and covers the opening of the mounting frame body to the mounting frame body. In the inner panel of the vehicle door to be mounted, an inner panel steel plate part made of a steel plate having substantially the same outer periphery as the opening part of the mounting frame body, and the inner panel steel plate part of the inner panel steel plate part for mounting on the mounting frame body. And an inner panel mounting portion made of resin provided on the peripheral portion.

With the above structure, the inner panel mounting portion is provided by resin on the peripheral edge of the inner panel steel plate for mounting on the mounting frame. Therefore, unlike the conventional steel sheet inner panel, the shape of the inner panel mounting surface does not need to have high surface accuracy during press molding in accordance with the mounting surface of the mounting frame, so the cost of the press molding process can be reduced. Can be lowered.

Further, since the inner panel steel plate occupies most of the inner panel, the resin portion is much smaller than the resin inner panel. Therefore, for example, when the resin portion is formed by injection molding, the injection projection area is significantly reduced, so that an injection molding machine or the like having a large mold closing force is not required, and the molding cost can be suppressed.

Therefore, it is not necessary to take measures against molding shrinkage and thermal expansion, and the mechanical strength can be secured by the inner panel steel plate part made of steel plate which occupies most of the inner panel, so it is necessary to use expensive resin. Instead, the material cost can be reduced.

Further, in contrast to the conventional steel plate inner panel,
By making the inner panel mounting part of the inner panel made of resin, it is possible to reduce the weight and reduce the difficulty during assembly work. In addition, the degree of freedom in designing the inner panel mounting part is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcement ribs. The adjustment is much easier in design than the adjustment in molding.

Further, since the inner panel steel plate made of steel plate is used for most of the inner panel, rigidity and dimensional accuracy can be secured as compared with the conventional resin inner panel.

Further, the inner panel of the vehicle door of the present invention is such that when the inner panel is attached to the mounting frame body, the inner panel completely covers the opening of the mounting frame body. The attachment portion is characterized in that it includes a cover portion extending from a peripheral portion of the inner panel steel plate portion.

With the above construction, the cover portion covering the opening formed between the inner panel and the opening portion of the mounting frame body is made of resin and extends from the peripheral edge portion of the inner panel steel plate portion. The frame body and the inner panel steel plate portion can be partially overlapped and attached. This is by shifting the inner panel steel plate from the position of the opening of the original mounting frame,
This means that the inner panel is attached to the attachment frame by rotating or turning it over. As a result, a strong connection can be obtained by connecting the steel plates to each other at the overlapping portion, and it is possible to selectively improve the strength with respect to the site where high stress occurs.

When the inner panel steel plate and the mounting frame are mounted using the mounting holes of the inner panel steel plate, the inner panel steel plate and the mounting frame may be brought into direct contact with each other. You may attach via the resin seat surface formed in.

Further, in the inner panel of the vehicle door of the present invention, the inner panel mounting portion includes a seat surface portion extending substantially in the same plane from the peripheral edge portion of the inner panel steel plate portion, and the seat surface portion. Is provided with a mounting hole for fixing to the mounting frame.

With the above-described structure, the seating surface portion provided with the mounting hole for fixing to the mounting frame body is extended substantially in the same plane from the peripheral edge portion of the inner panel steel sheet, so that the inner panel is formed. A stable attachment between the mounting frame and the mounting frame can be easily obtained with a fastener such as a bolt.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. 1 to 14.

First, the structure of the vehicle door 1 according to the embodiment of the present invention will be described with reference to FIGS. 2 to 5.

FIG. 2 is a perspective view showing the vehicle door 1 to which various parts are attached. However, the door trim 4, the harness 79, the connector and the like are not shown. Also, FIG.
FIG. 4 is a perspective view of a door trim 4. Figure 4 shows the outer panel 2
It is a perspective view which shows the state with which the attachment frame body 3 was assembled. FIG. 5 is a sectional view of the vehicle door 1.

As shown in FIG. 5, the outer panel 2 is located outside the vehicle door 1 (outside the vehicle), and the door trim 4 is located inside (inside the room). Outer panel 2
Is a component forming the outside of the vehicle. The door trim 4 forms the interior side, and as shown in FIG. 3, a switch 41 such as a power window and a door lock is arranged, and has a door pocket 42 protruding toward the interior side.

As shown in FIG. 5, the outer panel 2 and the door trim 4 are assembled to the mounting frame body 3. The inner panel 5 is attached so as to cover the opening 31 of the attachment frame 3. This attachment will be described later in detail.

Next, the structure of the inner panel 5 of the vehicle door 1 will be described with reference to FIGS. 6, 7 (a) and 7 (b).

FIG. 7A is a plan view of the inner panel 5, and FIG. 7B is a sectional view taken along the line AA of FIG. 7A. FIG. 6 is a plan view of the inner panel steel plate portion 50 of the inner panel 5.

As shown in FIG. 7A, the inner panel 5
Is an inner panel steel plate part 50 which is a steel plate part, a resin-made mounting seat surface (inner panel mounting part) 60 formed on a peripheral portion of the inner panel steel plate part 50, and the inner panel steel plate part 50. It is composed of a resin component formed on one side.

As shown in FIG. 7B, the mounting seat surface 60
Has a connecting portion 65 with the inner panel steel plate 50, and an attaching portion (seat surface portion) 66 for attaching to the attaching frame body 3, and these connecting portion 65 and the attaching portion 66 are integrated. .

First, the inner panel steel plate portion 50 of the inner panel 5 will be described.

As shown in FIGS. 2 and 4, the outer peripheral shape of the inner panel steel plate portion 50 is substantially the same as the opening shape of the opening portion 31 of the mounting frame body 3. As will be described later, the inner panel steel plate portion 50 uses a steel plate piece punched out from the opening 31 of the mounting frame 3 during the press forming step (S in FIG. 1).
This is because it is formed at the same time as the mounting frame 3 in 1).

Further, the inner panel steel plate portion 50 has concave and convex shapes, for example, concave portions 51 and 52 which are deep portions of the door pocket, convex portions 53 which support the door trim 4 and the like, on the inner side thereof.

Further, the inner panel steel plate portion 50 is manually provided with an opening in the inner portion, for example, a working hole 54 for assembling a handle lever for closing and opening the vehicle door 1 from outside the vehicle, and a window glass 71. It has a mounting hole 55 for a window glass manual lifting handle for lifting and lowering, a power window lifting motor mounting hole 56, a speaker mounting hole 57, a window glass mounting work hole 58, and an opening for avoiding interference with assembly parts. .

Further, the inner panel steel plate portion 50 is provided at a connection portion (overlapped portion) covered (sandwiched) by the connection portion 65 of the resin-made mounting seat surface 60 located at the peripheral portion thereof,
A drop-out preventing shape 59 for preventing the attachment seating surface 60 from coming off from the inner panel steel plate 50 is provided at a predetermined position.

The slip-out preventing shape 59 will be described with reference to FIGS. 8 to 10.

8 to 10 show the inner panel steel plate portion 5
0 prevention shape 59 (59a, 59b, 5)
FIG. 9C is a cut perspective view showing various aspects of 9c).

The slip-out preventing shape 59 is formed at the peripheral portion of the inner panel steel plate portion 50 and at the connection portion with the connecting portion 65 of the resin-made mounting seat surface 60 formed so as to sandwich the peripheral portion. Has been done.

As the slip-out preventing shape 59, for example, FIG.
As shown in (a) and (b), the through holes 59a may be provided intermittently. Thereby, the resin can be continuously molded through the through hole 59a. In addition, as shown in FIGS. 9 (a) and 9 (b), the groove 59b provided integrally, or FIG.
As shown in (a) and (b), intermittently arranged depressions 59c may be provided. Further, as the removal preventing shape 59, recesses, columnar depressions, deep holes, etc. are intermittently provided in rows,
The depressions, depressions, etc. may be provided integrally or continuously.

These slip-out preventing shapes 59 can prevent the mounting seat surface 60 from slipping off from the peripheral edge of the inner panel steel plate 50. The inner panel steel plate portion 50 shown in FIGS. 6, 7 (a) and 7 (b) is provided with through holes 59a (FIGS. 8 (a) and 8 (b)) intermittently at the periphery. It is set up.

In this way, the inner panel steel plate 50 is
By providing the pull-out preventing shape 59 at the connection portion of the resin-made mounting seat surface 60 with the connection portion 65, the connection is strengthened,
Even in the case of a side collision, the resin mounting seat 60
Can be prevented from coming off from the inner panel steel plate 50.

Further, although not shown, the inner panel steel plate portion 50 has a positioning hole used for positioning on the mold during the injection molding step (S2) described later.

Next, the resin mounting seat surface 60 of the inner panel 5 will be described.

As shown in FIG. 7, the resin mounting seat surface 60 is located at the peripheral edge of the inner panel steel plate portion 50 and is provided so as to sandwich (cover from above and below) the inner panel steel plate portion 50. The connecting portion 65 is connected to the inner panel steel plate 50, and the pull-out preventing shape 59 prevents the pull-out. Further, a mounting portion 66 having a mounting hole 63 for mounting the inner panel 5 on the mounting frame 3 is provided.

The connecting portion 65 of the mounting seating surface 60 sandwiches (covers from above and below) the inner panel steel plate 50 over the entire circumference of the peripheral portion including the slip-out preventing shape 59 provided on the inner panel steel plate 50. And surrounds the peripheral edge of the inner panel steel plate 50.

The mounting portion 66 of the mounting seat surface 60 has a mounting surface shape that matches the mounting surface shape on the mounting frame 3 side. In the present embodiment, since the mounting surface on the side of the mounting frame 3 is flush, the mounting surface of the mounting portion 66 of the mounting seat surface 60 is also flush. Further, the mounting portion 66 of the mounting seat surface 60
Is a mounting hole 3 provided with a weld nut on the mounting frame 3 side.
It has a mounting hole 63 corresponding to 2. This mounting hole 63
The inner panel 5 is attached to the attachment frame body 3 by using bolts. Therefore, the mounting portion 66 of the mounting seat surface 60 that contacts the bolt head is flat. Alternatively, the inner panel 5 may be attached to the attachment frame body 3 by fitting a grommet into the attachment hole 63 and screwing it from the attachment portion 66 side of the attachment seat surface 60 with a tapping screw.

In the present embodiment, the shape of the mounting seat surface 60 is such that the entire periphery of the inner panel steel plate 50 is
In addition, it has a shape that extends outward by a substantially constant length. However, the shape of the mounting seat surface 60 is not limited to this. For example,
It may have a shape in which an ear-shaped protrusion extending only around the mounting hole 63 corresponding to the mounting hole 32 of the mounting frame 3 is provided intermittently or partially continuously.

The distance between the outer end surface of the mounting seat surface 60 and the outer end surface of the inner panel steel plate portion 50, that is, the distance between the outer end surface of the mounting seat surface 60 and the opening portion 31 surface of the mounting frame 3 is a wrap. The amount is 20 to 20 for general passenger car doors.
30 mm is preferable and 25 mm is suitable.

In the conventional steel plate inner panel, the shape of the mounting surface with the mounting frame body 3 requires high surface accuracy during press molding. However, since the inner panel 5 has the resin mounting seat surface 60 as the mounting surface to the mounting frame body 3, it is not necessary to provide high surface accuracy during the press molding step (S1 of FIG. 1) described later, and the press The cost of the molding process can be reduced.

Further, as compared with the conventional resin inner panel,
Very few resin parts. Therefore, the injection projection area is significantly reduced, so that an injection molding machine or the like having a large mold closing force is not required, and the molding cost can be suppressed. Furthermore, this eliminates the need to take measures against molding shrinkage and thermal expansion, and since the inner panel steel plate portion 50 made of steel plate occupying most of the inner panel 5 can secure mechanical strength, expensive resin can be secured. There is no need to use it, and the material cost can be reduced.

Here, a thermoplastic resin is generally used as a molding material for the resin portion of the inner panel 5, but a thermosetting resin may be used. Examples of the thermoplastic resin include polypropylene (PP) + glass fiber, polycarbonate (P
C) + alloy material, polyamide (PA) + glass fiber, A
BS resin etc. Examples of the thermosetting resin include unsaturated polyester and epoxy resin.

Further, since the inner panel steel plate portion 50 made of steel plate is used for most of the inner panel 5, rigidity and dimensional accuracy can be secured as compared with the conventional resin inner panel.

Further, in contrast to the conventional inner panel which is entirely made of steel plate, the inner panel mounting portion at the peripheral portion of the inner panel 5 is made of resin, so that the weight can be reduced, and it is possible to reduce the weight at the time of assembling work. The difficulty can be reduced.

In addition, the degree of freedom in designing the inner panel mounting portion is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcing ribs. The adjustment is much easier in design than the adjustment in the press forming of the metal plate.

Further, a concave sealing material groove 64 for embedding a waterproof sealing material is provided on the entire surface of the mounting seat surface 60 in contact with the mounting frame 3. The sealing material groove 64 may be located outside the mounting hole 63 as shown in FIG. 5 or inside the mounting hole 63 as shown in FIG. 7. Further, the groove 64 for the sealing material
May be partially provided in the inner panel steel plate portion 50.

Further, a reinforcing rib may be provided around the mounting hole 63 of the mounting seat surface 60. The reinforcing rib can be formed in, for example, a rail shape or a grid shape. With the simple structure of providing the ribs, it is possible to temporarily receive the impact at the time of a side collision.

Finally, the resin parts of the inner panel 5 located on the inner side of the inner panel steel plate 50 will be described with reference to FIG.

The resin parts of the inner panel 5 include a door functional part mounting portion and a door constituent part.

First, the inner panel 5 has a door functional component mounting portion for mounting a door functional component such as a handle lever, a harness, a speaker 77, and a door handle. For example, a handle lever attachment seat 61 for attaching a handle lever for closing and opening the vehicle door 1 from the room, a harness clip 6 are attached to the door functional component attachment portion.
2 and the like, and a mounting seat surface or the like provided at the edge of the hole for attaching the door functional parts such as the speaker 77 (FIG. 2) and the door handle for closing and opening the vehicle door 1 from outside the vehicle. included.

Further, the inner panel 5 has door components such as a cover, a bracket and a waterproof cover. For example, the door components include the recesses 51 and 52 which are the depth parts of the door pocket, the projection 53 which supports the door trim 4, and the like.

Next, the main parts mounted on the inner panel 5 will be described with reference to FIGS. 2 and 5.

First, parts related to the power window mechanism will be described. The window glass 71 is locked by a glass stop plate 72, and the glass stop plate 72 is moved up and down by a wire 75 connected to a power window lift motor 74 while being guided by a glass lift rail 73. As shown in FIG. 5, the glass elevating rail 73 is fixed to the inner panel 5 from the indoor side by a fastener 76 such as a screw.

In addition, the inner panel 5 has a speaker 7
7, a handle lever attached to the handle lever attachment seat 61, and the like are also mounted.

Next, a method of manufacturing such an inner panel 5 will be described with reference to FIGS. 1, 6 and 7.

FIG. 1 is a flowchart showing a method of manufacturing the inner panel 5.

First, the press molding step (S1) is performed. In this press forming step, the mounting frame body 3 (FIG. 4) and the inner panel steel plate portion 50 (FIG. 6) which is the steel plate portion of the inner panel 5 are simultaneously formed by press forming from one steel plate. . At this time, the inner panel steel plate portion 50 is formed by using the steel plate of the portion punched out from the opening 31 of the mounting frame body 3. Therefore, the opening shape of the opening 31 of the mounting frame body 3 covered by the inner panel 5 and the outer peripheral shape of the inner panel steel plate 50 are substantially the same.

At the time of this press forming step, the uneven portions 51 to 53 and the holes 54 to 58 on the inner side of the inner panel steel plate 50 described above are also provided at the same time.

Further, at the time of this press molding process, a positioning hole (not shown) used for positioning to the mold at the time of injection molding process (S2) described later and a connection portion with the resin mounting seat surface 60 are provided. The falling prevention shape 59 (FIGS. 8 to 1)
0) are respectively formed at predetermined positions on the inner panel steel plate 50.

Therefore, the steel plate in the opening 31 of the mounting frame 3 generated during the press forming process can be used as the inner panel steel plate 50 without waste and without being discarded. Therefore, in the case of a door for a normal passenger car, the yield can be improved by 15 to 25%, and the material cost can be reduced, as compared with the conventional steel plate inner panel. Further, since the mounting frame body 3 and the inner panel steel plate portion 50 can be simultaneously formed by press forming in one press forming step, the press forming steps can be integrated and the processing cost can be significantly reduced.

After the press molding step, a rust preventive step of applying a rust preventive agent or a surface treatment step of applying a primer or roughening the surface may be carried out in order to improve the adhesion of the resin.

Second, injection molding process (resin part molding process)
(S2) is performed. The resin-made seating surface 60 located on the peripheral edge of the inner panel steel plate 50 and the resin-made components located on the inner side thereof are formed by injection molding (insert molding) to form the inner panel 5 shown in FIG. Finalize.

In the injection molding step (S2), first,
Positioning is performed using the positioning holes formed in the press molding step (S1), and the inner panel steel plate portion 50 is set and fixed in the mold. Next, a molten synthetic resin is injection-molded in a cavity (gap) formed by closing the mold, and the mounting seat surface 6 integrated with the inner panel steel plate 50 is formed.
0 and resin parts are formed.

That is, the connection portion 65 integrated with the slip-out preventing shape 59 of the inner panel steel plate portion 50 and the attachment portion 66 having the seat surface and the attachment hole 63 for attachment to the attachment frame 3 are integrated. The transformed seat surface 60 is formed. Also,
On the surface of the mounting portion 66 of the mounting seat surface 60 in contact with the mounting frame body 3, a groove 64 for a sealing material is formed at the same time along the entire circumference. Further, reinforcing ribs can be provided at the same time around the mounting hole 63 of the mounting portion 66 of the mounting seat surface 60.

Further, in this injection molding process, in addition to the mounting seat surface 60 with the mounting frame body 3 provided on the peripheral portion of the inner panel steel plate portion 50, the handle lever mounting seat 61, the harness clip 62, etc. The door functional component mounting seat is formed at the same time.

Further, during the injection molding process, a mounting seat surface provided at the edge of a hole for mounting a door functional component such as the speaker 77 and a door handle, and a door component such as a cover and a bracket are formed.

Next, an outline of an assembling process of the vehicle door 1 using the completed inner panel 5 will be described with reference to FIG.

First, the harness 79 is assembled to the inner panel 5 using the harness clip 62 of the inner panel 5. Next, the glass elevating rail 73 is fixed to the inner panel 5 using a fastener 76 such as a screw.

Before the inner panel 5 is mounted on the mounting frame body 3, for example, an elastic silicone-based or urethane-based sealing material is embedded in the sealing material groove 64 of the mounting seat surface 60 in advance. By this sealing material, the mounting frame body 3 and the inner panel 5 are brought into close contact with each other, and a waterproof effect is exhibited.

Then, the inner panel 5 is attached to the attachment frame body 3 so as to cover the opening 31 of the attachment frame body 3. At this time, the inner panel steel plate 50 is attached so that the outer peripheral shape thereof substantially matches the shape of the opening 31 of the mounting frame 3. That is, the inner panel steel plate portion 50 made of the steel plate in the opening 31 of the mounting frame 3 is attached to the original member as it is, offset in the thickness direction.

Next, the mounting holes 63 of the mounting seat surface 60 of the inner panel 5 and the mounting holes 32 of the mounting frame body 3 are mounted with fasteners 78 such as bolts. At this time, as shown in FIG. 5, the glass elevating / lowering rail 73 fixed to the inner panel 5 does not enter from the opening 31 of the mounting frame 3 in an upright state. Therefore, the glass elevating rail 73 is positioned between the mounting frame 3 and the outer panel 2 in a state in which the glass elevating rail 73 is once rotated 90 degrees and laid down. In this state, the glass raising / lowering rail 73 is returned to the upright state by rotating it again by 90 degrees, and the inner panel 5 is attached to the attachment frame 3 as described above.

Further, a window glass 71 is inserted through an opening 11 formed in the upper portion of the outer panel 2 and the mounting frame body 3,
The glass stopper plate 72 on the glass lifting rail 73 is engaged. This locking work is performed using the window glass mounting work hole 58 (FIG. 6) provided in the inner panel 5.

Finally, after connecting the harness 79 attached to the inner panel 5 with the harness clip 62 to the switch 41 via the connector provided on the door trim 4, the door trim 4 is attached to the attachment frame 3. The vehicle door 1 is almost completed.

In the above description, the mounting frame 3
From the steel plate in the opening 31 of the inner panel steel plate 50
Are simultaneously formed in a press forming process, and the inner panel 5 is formed by forming a resin portion on the inner panel steel plate portion 50, and the inner panel 5 is formed by offsetting only in the thickness direction with respect to the original position of the opening portion 31 and mounting. It was attached to the frame 3.

However, the mounting is not limited to this. For example, the inner panel steel plate portion 50 may be attached to the attachment frame body 3 by being shifted in the vertical direction or the horizontal direction with respect to the original opening portion 31, rotated, or turned over. By mounting in this manner, a strong connection can be obtained by connecting the steel plates to each other at the overlapping portion of the inner panel steel plate part 50 and the mounting frame body 3, and the strength with respect to the part where high stress occurs Can be selectively improved.

Here, an example in which the inner panel steel plate portion is displaced rearward of the vehicle body with respect to the original opening is shown in FIGS.
It will be described based on.

FIG. 11 is a schematic plan view showing the mounting frame body 80, and FIG. 12 is a schematic plan view showing the inner panel steel plate portion 91. 13 is a schematic plan view showing the inner panel 90, and FIG. 14 is a schematic plan view showing the assembly of the mounting frame 80 and the inner panel 90 as seen from the indoor side.

In the press molding process (S1 in FIG. 1),
The inner panel steel plate portion 91 shown in FIG. 12 is formed at the same time as the mounting frame body 80 shown in FIG. 11, and the outer peripheral shape of the inner panel steel plate portion 91 is substantially the same as the shape of the opening 81 of the mounting frame body 80. Match. In addition, during this press molding process,
In the mounting frame body 80, a mounting hole 82 provided in the peripheral portion of the opening 81 and a mounting hole 84 provided in the ear portion 83 projecting from the upper and lower central portions of the opening 81 are simultaneously formed.
On the other hand, in the inner panel steel plate portion 91, a mounting hole 93 corresponding to the mounting hole 82 and a mounting hole 94 corresponding to the mounting hole 84 are simultaneously formed.

Next, in the injection molding step (S2 in FIG. 1), the resin mounting seat surface 92 and the door functional component mounting portion 9 are formed.
5 is formed in the inner panel steel plate portion 91, and the inner panel 90 shown in FIG. 13 is completed.

As shown in FIG. 2, in the inner panel 5 described above, the inner panel steel plate portion 50 is offset with respect to the opening 31 of the mounting frame body 3 only at the same position in the thickness direction, and the inner panel steel plate portion 50 is offset. 5 was attached to the mounting frame body 3.
Therefore, there was almost no opening (gap) between the inner panel steel plate 50 and the original opening 31.

On the other hand, as shown in FIG. 14, on the other hand, the inner panel steel plate portion 91 is assembled to the original opening portion 81 by being shifted toward the rear of the vehicle body and assembled. An opening (gap) is generated between the opening 81 and the original opening 81. In order to cover this opening, the inner panel 9
0, a resin cover 96 is formed on the front side of the vehicle. On the contrary, on the rear side of the vehicle, the inner panel steel plate 91
And the mounting frame body 80 overlap with each other, and the resin mounting seat surface 92 is not formed on the inner panel 90 at the overlapping portion.

Further, in the inner panel 5, the sealing material groove 64 is formed over the entire circumference of the resin mounting seat surface 60 (see FIG. 7). On the other hand, in this inner panel 90, the groove 97 for the sealing material on the vehicle rear side is formed in the inner panel steel plate portion 91, and the other three grooves 98 for the sealing material are formed in the resin mounting seat surface 92. There is. The sealing material groove 97 formed in the inner panel steel plate portion 91 is formed during the press forming process. The seal material groove 97 and the seal material groove 98 are preferably formed so as to be connected to each other. This is because when the inner panel 90 is attached to the attachment frame 80, the sealing material is filled in the sealing material grooves 97 and 98, and the sealing material is foamed so as to effectively perform the role of waterproofing.

Here, as shown in FIG. 14, the glass elevating rail 99 is obliquely attached to the inner panel 90. A force is applied to the glass lifting rail 99 when the window glass is lifted. Therefore, the force is also applied to the inner panel 90 to which the glass elevating rail 99 is attached. This force is applied to the vehicle rear side with respect to the opening 81, and accordingly, the inner panel steel sheet 91 is displaced toward the vehicle body rearward with respect to the original opening 81, and the inner panel steel sheet 91 is displaced. The mounting holes 93 of the portion 91 and the mounting holes 82 of the mounting frame body 80, and the mounting holes 94 of the inner panel steel plate portion 91 and the mounting holes 84 of the mounting frame body 80 are fastened to each other with fasteners such as bolts. As a result, a strong fastening force can be obtained, so that the above force can be counteracted.

In the method of manufacturing an inner panel for a vehicle door, the mounting frame body and the inner panel steel plate portion may be simultaneously press formed in the press forming step.

Thus, since the mounting frame and the inner panel steel plate portion can be simultaneously press-formed in a single press-forming step, the press-forming steps can be integrated and the processing cost can be greatly reduced. .

In the inner panel of the vehicle door of the present invention, the inner panel may be attached to the mounting frame body without any overlapping portion between the inner panel steel plate portion and the mounting frame body. .

As a result, the inner panel is attached to the mounting frame body without forming an overlapping portion between the inner panel steel plate and the mounting frame body. Therefore, the inner panel steel plate part and the mounting frame body do not interfere with each other, and the inner part of the inner panel steel plate part is excluded except for the connection part between the inner panel steel plate part and the resin inner panel mounting part. The concave and convex portions can be freely provided on the surface, which increases the degree of freedom in design.

According to the method of manufacturing an inner panel for a vehicle door of the present invention, when the inner panel is attached to the mounting frame body in the resin molding step, the inner panel steel plate portion and the opening of the mounting frame body are opened. The cover portion that covers the opening formed between the portion and the portion may be formed of resin.

Thus, by forming the cover portion covering the opening formed between the inner panel steel plate portion and the opening portion of the mounting frame body from the resin, the mounting frame body and the inner panel steel plate portion are partially formed. Can be mounted in layers. This means that the inner panel steel plate portion is displaced from the original position of the opening portion of the mounting frame body, rotated, or turned over to mount the inner panel to the mounting frame body. As a result, a strong connection can be obtained by connecting the steel plates to each other at the overlapping portion, and it is possible to selectively improve the strength with respect to the site where high stress occurs.

When the inner panel steel plate and the mounting frame are mounted using the mounting holes of the inner panel steel plate, the inner panel steel plate and the mounting frame may be in direct contact with each other. You may attach via the resin seat surface formed in.

In the method of manufacturing an inner panel for a vehicle door of the present invention, at least one of a functional component mounting portion for mounting a functional door component on the inner panel steel plate in the resin molding step and a door constituent component. One of them may be made of resin.

Thus, in the mounting portion forming step, the resin functional component mounting portion and the resin door component are simultaneously provided on the inner panel steel plate portion, so that no extra step is required.

The inner panel of the vehicle door according to the present invention includes the inner panel steel plate portion, which has a pull-out preventing shape at the peripheral edge portion for preventing the inner panel mounting portion from coming off from the inner panel steel plate portion. Good.

With this structure, the inner panel steel plate has a shape for preventing the inner panel steel plate from coming off, so that the inner panel steel plate part and the resin-made inner panel mounting portion are prevented from coming off even in the event of a side collision. In addition, this removal prevention structure is, for example, an intermittent or continuous hole at a connecting portion (overlapping portion) of the inner panel steel plate portion with the inner panel mounting portion,
It is configured by forming grooves, depressions, and the like, and sandwiching the steel plate (covering it from above and below) to form a resin inner panel mounting portion.

In the inner panel of the vehicle door of the present invention, the inner panel mounting portion may further include a sealing material groove for embedding a sealing material in a mounting surface with the mounting frame.

As a result, the mounting gap between the resin-made inner panel mounting portion of the inner panel and the mounting frame body is closed by firing of the sealing material embedded in the groove, and it is possible to play the role of waterproofing.

The inner panel of the vehicle door according to the present invention may further include a groove for a sealing material for embedding a sealing material in a mounting surface of the inner panel with the mounting frame.

As a result, the mounting gap between the inner panel and the mounting frame is blocked by the firing of the sealing material embedded in the groove, and a waterproof function can be achieved.

In the vehicle door of the present invention, the inner panel of the vehicle door having the above structure may be attached to the mounting frame.

As a result, a vehicle door having the inner panel having the above-mentioned structure can be obtained. Therefore, a vehicle door that is rigid, lightweight, and inexpensive can be obtained.

[0131] Further, the limitation of the shape compatibility with the conventional inner panel is only the connecting portion between the inner panel steel plate portion and the inner panel mounting portion in the inner panel of the vehicle door of the present invention. Therefore, since an inner panel having a very high compatibility with the conventional inner panel can be obtained, it is not necessary to change the structure of the conventional vehicle door at all or almost.

The vehicle door structure of the present invention is the door structure in which the outer panel forming the outside of the vehicle door and the mounting frame body are assembled, and then the door trim forming the inside is assembled. There is an inner panel provided between the mounting frame body and the door trim, and the inner panel is made of resin for mounting to the mounting frame body on the outer periphery of a steel plate having substantially the same shape as the opening shape of the mounting frame body. The inner panel having the mounting seat surface integrally formed therein may be incorporated.

Thus, by providing the resin mounting seat surface on the outer periphery, the inner panel body shape can be made one size smaller than the size of the conventional steel sheet only inner panel. Because you can
The yield of the steel plate material is improved (improvement of 15 to 25%). In addition, since most of the inner panel is made of steel plate, rigidity and dimensional accuracy can be sufficiently secured, which is excellent. Further, in the steel plate inner panel, the shape of the mounting surface must be adjusted to the surface accuracy during press molding according to the mounting surface of the mounting frame, but in the present invention, the mounting seat surface can be molded with resin. Since the rigidity is further improved, there is no need to worry about warping or deformation. In addition, the degree of freedom in designing the inner panel mounting part is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcement ribs. The adjustment is much easier in design than the adjustment in molding.

As a result, in comparison with the inner panel in which the reinforcing inner panel is covered with the resin inner panel, the projected area of the injection molding is smaller in the present invention, so that the molding is performed by the molding machine having a smaller mold closing force. Therefore, the molding cost can be reduced.

Further, in the structure of the vehicle door described above, the inner panel uses the steel plate of the opening generated when the steel plate is punched by press molding in order to manufacture the mounting frame body. Alternatively, a resin mounting seat surface for mounting on the mounting frame may be integrally provided.

As a result, since the inner panel body can use the member of the opening when the mounting frame opening is punched out, it has rigidity and the cost of the inner panel can be considerably reduced.

Further, in the structure of the vehicle door described above, the mounting seat surface of the component assembled to the steel plate and the resin mounting seat surface for mounting to the mounting frame are integrally formed on the outer periphery by injection molding or the like. It may be provided at the same time when it is provided.

As a result, in the mounting parts such as the speaker, the unevenness due to the deep drawing is difficult to make with the steel plate in the steel plate-only inner panel, and it is not possible to assemble, or the cover of another part is attached. It was A hole can be formed in the component mounting portion and a resin cover, a waterproof cover and the like can be integrally molded when molding the mounting seat surface, so that extra assembly work can be reduced.

The method for manufacturing an inner panel for a vehicle door according to the present invention is a vehicle for which a mounting frame is attached to an outer panel on the outside of the vehicle, and is attached to the mounting frame by covering an opening of the mounting frame. In the method for manufacturing an inner panel of a door, by press-forming a steel plate to form an opening of the mounting frame body, and press-forming to obtain an inner panel steel plate part which is a steel plate piece punched out from the opening. The method may include a step and an attaching portion forming step of forming an inner panel attaching portion for attaching the inner panel steel sheet portion to the attaching frame body in the inner panel steel sheet portion.

Further, in the method for manufacturing an inner panel for a vehicle door according to the present invention, the mounting portion forming step is a resin molding step, and the inner panel mounting portion is made of resin on the peripheral portion of the inner panel steel plate portion. It may be a forming method.

The inner panel of the vehicle door according to the present invention has a mounting frame body attached to the outer panel outside the vehicle, and the inner panel of the vehicle door mounted on the mounting frame body so as to cover the opening of the mounting frame body. The panel may be configured to include an inner panel steel plate part made of a steel plate having a shape substantially the same as the opening of the mounting frame body, and an inner panel mounting part for mounting on the mounting frame body.

Further, the inner panel of the vehicle door according to the present invention may be arranged such that the inner panel mounting portion is provided on the peripheral portion of the inner panel steel plate portion with resin.

The method of manufacturing a vehicle door according to the present invention is
By forming the opening of the mounting frame body by press-forming a steel plate, a step of obtaining an inner panel steel plate part which is a steel plate piece punched out from the opening, and the step of mounting the outer panel outside the vehicle. The method may include a step of covering the opening of the mounting frame body and mounting the inner panel steel plate portion to the mounting frame body.

Further, in the vehicle door of the present invention, the inner panel steel plate portion, which is made of a steel plate having a substantially same outer periphery as that of the opening, covers the opening of the mounting frame attached to the outer panel outside the vehicle. It may be configured to be attached to the attachment frame.

[0145]

As described above, according to the method of manufacturing the inner panel of the vehicle door of the present invention, the opening of the mounting frame is formed by pressing the steel plate, and the steel punched out from the opening. Press forming process to obtain the inner panel steel plate part that is a metal plate, and resin molding in which the inner panel mounting part for mounting the inner panel steel plate part to the mounting frame is formed of resin on the peripheral edge of the inner panel steel plate part And a step.

Therefore, the steel plate piece in the opening of the mounting frame generated in the press forming can be used as the inner panel steel plate portion without waste and can be used as compared with the conventional steel plate inner panel. This has the effect of reducing material costs.

Also, like the conventional steel plate inner panel,
The shape of the mounting surface of the inner panel does not have to have high surface precision during press molding in accordance with the mounting surface of the mounting frame body, so that the cost of the press molding process can be reduced.

Further, since the inner panel steel plate occupies most of the inner panel, the resin portion is much smaller than the resin inner panel. Therefore, for example, when the resin portion is formed by injection molding, the injection projection area is significantly reduced, so that an injection molding machine or the like having a large mold closing force is not required, and the molding cost can be suppressed.

Further, since it is not necessary to take measures against molding shrinkage and thermal expansion, and the mechanical strength can be secured by the inner panel steel plate made of steel plate which occupies most of the inner panel, expensive resin is used. There is no need, and the effect of reducing the material cost is achieved.

In addition, in contrast to the conventional steel plate inner panel,
Since the inner panel mounting portion of the inner panel is made of resin, it is possible to reduce the weight and reduce the difficulty during the assembling work. In addition, the degree of freedom in designing the inner panel mounting part is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcement ribs. The adjustment is much easier in design than the adjustment in molding.

Since the inner panel steel plate made of steel plate is used for most of the inner panel, there is an effect that rigidity and dimensional accuracy can be secured as compared with the conventional resin inner panel.

Furthermore, the method for manufacturing an inner panel for a vehicle door according to the present invention is a method of forming the shape of the inner portion of the inner panel steel plate in the press forming step.

Therefore, in the same press forming process, the mounting frame and the shape of the inner portion of the inner panel steel plate can be formed by press forming at the same time, so that the press forming process can be integrated and the processing cost can be reduced. The effect is that it can be lowered significantly.

Further, in the method for manufacturing an inner panel for a vehicle door according to the present invention, in the resin molding step, a door for attaching a door functional component of the vehicle door to an inner portion of the inner panel steel plate portion. This is a method of forming a functional component mounting portion.

Therefore, in the resin molding step, since the door functional component mounting portion made of resin is simultaneously provided in the inner portion of the inner panel steel plate, no extra molding step is required in the resin molding step. Has the effect. Further, there is an effect that it becomes possible to form a complicated uneven portion or a deep cover shape which is difficult to form by press molding with a resin.

Further, in the method for manufacturing an inner panel for a vehicle door of the present invention, when the inner panel is attached to the mounting frame body, the inner panel completely covers the opening of the mounting frame body. In the resin molding step, it is a method of forming a cover portion extending from a peripheral edge portion of the inner panel steel plate portion.

Therefore, by further forming the cover portion covering the opening formed between the inner panel and the opening portion of the mounting frame body from the peripheral portion of the inner panel steel plate portion and forming it by resin, The frame body and the inner panel steel plate portion can be partially overlapped and attached. This is by shifting the inner panel steel plate from the position of the opening of the original mounting frame,
This means that the inner panel is attached to the attachment frame by rotating or turning it over. As a result, it is possible to obtain a strong connection by connecting the steel plates to each other at the overlapping portion, and it is possible to selectively improve the strength with respect to a portion where high stress occurs.

Further, the inner panel of the vehicle door of the present invention includes an inner panel steel plate portion made of a steel plate having a shape substantially the same as the opening of the mounting frame body, and an inner panel steel plate for attaching to the mounting frame body. And an inner panel mounting portion made of resin provided on the peripheral portion of the metal plate.

Therefore, unlike the conventional steel sheet inner panel, it is not necessary to give a high surface accuracy to the shape of the mounting surface of the inner panel in accordance with the mounting surface of the mounting frame, so that the press molding is not required. This has the effect of reducing the cost of the process.

Since the inner panel steel plate occupies most of the inner panel, the resin portion is much smaller than the resin inner panel. Therefore, for example, when the resin portion is formed by injection molding, the injection projection area is significantly reduced, so that an injection molding machine or the like having a large mold closing force is not required, and the molding cost can be suppressed.

Also, since it is not necessary to take measures against molding shrinkage and thermal expansion, and the mechanical strength can be secured by the inner panel steel plate part made of steel plate which occupies most of the inner panel, it is necessary to use expensive resin. Instead, the material cost can be reduced.

Further, in comparison with the conventional steel plate inner panel,
Since the inner panel mounting portion of the inner panel is made of resin, it is possible to reduce the weight and reduce the difficulty during the assembling work. In addition, the degree of freedom in designing the inner panel mounting part is increased by making it easier to match the clearance with the mounting surface of the mounting frame, increase the wall thickness to improve rigidity, and add reinforcement ribs. The adjustment is much easier in design than the adjustment in molding.

Further, since the inner panel steel plate made of steel plate is used for most of the inner panel, there is an effect that rigidity and dimensional accuracy can be secured as compared with the conventional resin inner panel.

Further, the inner panel of the vehicle door of the present invention is such that when the inner panel is attached to the mounting frame body, the inner panel completely covers the opening of the mounting frame body. The mounting portion is configured to include a cover portion extending from a peripheral portion of the inner panel steel plate portion.

Therefore, the cover portion covering the opening formed between the inner panel and the opening portion of the mounting frame body is further extended from the peripheral edge portion of the inner panel steel plate portion and is made of resin, so that the mounting is performed. The frame body and the inner panel steel plate portion can be partially overlapped and attached. This is by shifting the inner panel steel plate from the position of the opening of the original mounting frame,
This means that the inner panel is attached to the attachment frame by rotating or turning it over. As a result, it is possible to obtain a strong connection by connecting the steel plates to each other at the overlapping portion, and it is possible to selectively improve the strength with respect to a portion where high stress occurs.

Further, in the inner panel of the vehicle door of the present invention, the inner panel mounting portion includes a seat surface portion extending substantially in the same plane from the peripheral edge portion of the inner panel steel plate portion, and the seat surface portion. Has a mounting hole for fixing to the mounting frame.

Therefore, the seat surface portion provided with the mounting hole for fixing to the mounting frame body is further extended in substantially the same plane from the peripheral edge portion of the inner panel steel plate portion so that the inner panel and the mounting portion can be mounted. There is an effect that stable attachment to the frame can be easily obtained by a fastener such as a bolt.

[Brief description of drawings]

FIG. 1 is a flowchart showing a method for manufacturing an inner panel for a vehicle door according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a vehicle door in a state where the inner panel shown in FIG. 7 is attached to a mounting frame body.

FIG. 3 is a perspective view showing a door trim attached to the vehicle door shown in FIG.

FIG. 4 is a perspective view showing a mounting frame body and an outer panel to which the inner panel shown in FIG. 7 is attached.

5 is a sectional view of a vehicle door having the inner panel shown in FIG.

6 is a plan view of an inner panel steel plate portion of the inner panel shown in FIG. 7. FIG.

FIG. 7 is a diagram showing an inner panel according to an embodiment of the present invention, FIG. 7 (a) is a plan view, and FIG. 7 (b) is (a).
3 is a cross-sectional view taken along line AA of FIG.

8 (a) is an explanatory view showing a slip-out preventing shape provided on the inner panel steel plate portion of the inner panel shown in FIG. 7, and FIG. 8 (b) is an inner panel steel plate portion and a mounting seat. It is explanatory drawing which shows the connection state with a surface.

9 is a view showing a modified example of FIG. 8, FIG. 9 (a) is an explanatory view showing a slip-out preventing shape provided in an inner panel steel plate portion of the inner panel, and FIG. 9 (b) is an inner view. It is explanatory drawing which shows the connection state of a panel steel plate part and a mounting seat surface.

10 is a diagram showing a modified example of FIG. 8, and FIG.
[Fig. 10] is an explanatory view showing a slip-out preventing shape provided in the inner panel steel plate portion of the inner panel, and Fig. 10 (b) is an explanatory view showing a connection state between the inner panel steel plate portion and the mounting seat surface.

11 is a schematic plan view showing a mounting frame body to which the inner panel shown in FIG. 13 is attached.

12 is a schematic plan view showing an inner panel steel plate portion of the inner panel shown in FIG.

FIG. 13 is a schematic plan view showing an inner panel according to another embodiment of the present invention.

14 is a schematic plan view showing a state where the inner panel shown in FIG. 13 is attached to a mounting frame body.

FIG. 15 is a perspective view showing a state in which an outer panel, an inner panel and a mounting frame body of a vehicle door according to a conventional technique are assembled.

FIG. 16 is a sectional view of a conventional vehicle door.

[Explanation of symbols]

1 Vehicle door 2 outer panel 3 mounting frame 5 Inner panel 31 opening 50 Inner panel steel plate 60 Mounting surface (Inner panel mounting part) 61 Handle lever mounting seat (door functional component mounting part) 62 harness clip (door functional component mounting part) 63 mounting hole 66 Mounting part (seat surface part) 77 speaker (door functional component) 80 mounting frame 81 opening 90 Inner panel 91 Inner panel steel plate 92 Mounting surface (inner panel mounting part) 95 Door functional component mounting part 96 Cover S1 press molding process S2 injection molding process (resin molding process)

Claims (7)

[Claims] 1. A method for manufacturing an inner panel for a vehicle door, wherein a mounting frame is mounted on an outer panel outside a vehicle, and the opening of the mounting frame is covered with the mounting frame, and a steel plate is press-molded. By forming the opening of the mounting frame body, by performing a press forming step to obtain an inner panel steel plate part which is a steel plate punched from the opening part, the inner panel steel plate part is the mounting frame body A method of manufacturing an inner panel for a vehicle door, comprising: a resin molding step of forming an inner panel mounting portion for mounting on a peripheral portion of the inner panel steel plate with a resin. 2. The method of manufacturing an inner panel for a vehicle door according to claim 1, wherein the shape of the inner portion of the inner panel steel plate is formed in the press forming step. 3. In the resin molding step, a door functional component mounting portion for mounting a door functional component of the vehicle door is formed on an inner portion of the inner panel steel plate portion. 1. The method for manufacturing an inner panel for a vehicle door according to 1 or 2. 4. A peripheral edge of the inner panel steel plate portion in the resin molding step so that the inner panel completely covers the opening of the mounting frame body when the inner panel is mounted on the mounting frame body. A method of manufacturing an inner panel for a vehicle door according to any one of claims 1 to 3, characterized in that a covering portion extending from the portion is formed. 5. An inner panel of a vehicle door, wherein a mounting frame body is mounted on an outer panel outside a vehicle, and covers the opening portion of the mounting frame body and is mounted on the mounting frame body. An inner panel steel plate part made of a steel plate having substantially the same outer circumference, and an inner panel mounting part made of a resin provided on the peripheral part of the inner panel steel plate part for mounting on the mounting frame body. The inner panel of the characteristic vehicle door. 6. When the inner panel is mounted on the mounting frame body, the inner panel mounting portion is formed of the inner panel steel plate so that the inner panel completely covers the opening of the mounting frame body. The inner panel for a vehicle door according to claim 5, further comprising a cover portion extending from a peripheral portion. 7. The inner panel mounting portion includes a seat surface portion extending substantially in the same plane from a peripheral portion of the inner panel steel plate portion, and the seat surface portion is fixed to the mounting frame body. The inner panel of the vehicle door according to claim 5, wherein a mounting hole is provided.