JPS6044163B2 - automotive door trim - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carnishless type automobile door trim.

Carnish-less type door trims omit the metal plate (carnish) that forms the upper part of the core material of the door trim, and extend the pad material and skin material laminated and bonded onto the surface of the hardboard core material from the upper edge of the core material. The extension part is installed along the curved surface of the door's inner panel (vehicle body side panel) by taking advantage of its flexibility, maintaining the same appearance as the conventional rigid door trim. At the same time, the door trim was made lighter and the number of parts was reduced.

In this carnishless type door trim structure, as shown in FIG. 1, for example, a pad material 3 and a skin material 4 are laminated and bonded to the surface of a core material 2 such as hardboard that constitutes the door trim 1 by welding or the like. A pad material 3 and a skin material 4 are formed by extending from the upper edge of the core material 2, and a hard board 6 is attached to the back surface of the extended end of the extended portion 5.

In addition, in order to assemble the door trim 1 configured in this way to the inner panel 7 on the door side, the mounting clips 8 are attached to the appropriate positions of the core material 2, and the mounting clips 8 are mounted opposite to the clip mounting positions of the inner panel 7. A mounting hole 8' is formed in the upper end of the inner panel 7.
A mounting bracket 10 with a U-shaped cross section that integrates the weather strip 9 is attached to the mounting bracket 10, and the hard board 6 of the door trim 1 is fitted and fixed to the U-shaped part of the mounting bracket 10, and the extension part 5 is fixed.
By fitting the mounting clip 8 into the mounting hole 8' while pulling, the extension portion 5 is extended along the upper curved surface of the inner panel 7, and the door trim 1 is attached to the side of the inner panel 7. I try to do that. By the way,
The waist line of the door (referring to the shape of the ridge line at the upper end of the inner panel 7 shown in FIG. In many cases, it is structured in a curved manner depending on the vehicle type.

For this reason, when a door trim as described above is attached to an inner panel having a curved portion, the degree of expansion of the extension portion 5 becomes partially unbalanced, causing wrinkles in the skin material 4.

Therefore, in order to eliminate this cause, the above-mentioned extension part is trimmed into a curved expanded shape to make the degree of expansion as uniform as possible, but generally the skin material is made of vinyl chloride or the like. Because of this, it expands and contracts significantly due to differences in temperature.
This expansion and contraction leads to dimensional errors, which has the disadvantage of being prone to wrinkles, especially in summer and winter. Further, as shown in FIGS. 2 and 3, a hole 11 for inserting a lock knob is formed at an appropriate position in the door trim, and an eyelet-shaped grommet 12 is fixed to this hole 11 to receive the lock knob. ing.

In this case, the grommet 12 is either caulked directly to the back surface of the extension part 5 of the door trim 1 as shown in FIG. 7 and the extension portion 5 and is locked on the back surface.

However, this part is also particularly susceptible to wrinkles due to the reasons mentioned above, and the hole 7b for the lock knob provided in the inner panel 7 is due to dimensional errors due to expansion and contraction of the skin material 4.
There have also been cases where the lock knob is not aligned with the inner periphery of the grommet 12, making it difficult to operate. Furthermore, since the grommet 12, weather strip 9, etc. are attached after the door trim is molded or on the vehicle assembly line, the number of man-hours required for assembling the door trim and the number of man-hours for assembling the vehicle are large, resulting in a drawback that it requires complicated labor.

The present invention was made in view of the above-mentioned drawbacks of the conventional garnish-less type door trim, and includes a flexible board on the back side of the extension. Furthermore, the weather strip and grommet are made of materials that can be high-frequency welded, and by welding them and fixing them to the extension part, wrinkles can be prevented from forming on the surface of the extension part. , as well as improving the appearance and assembling the door trim!
This is intended to reduce man-hours and assembly man-hours for the vehicle.

An embodiment of the present invention will be described in detail below with reference to the drawings.

However, the same reference numerals are given to the common parts and new numbers are given to only the different parts (explanation will be given below). FIGS. 4 to 6 show a garnish-less type door trim 20 according to the present invention. and shows how this door trim 20 is attached to the inner panel 7.
Similar to the above, a pad material 3 and a skin material 4 are laminated and bonded on the surface of a core material 2 such as hardboard, and a ribbon material 3 and a skin material 4 are extended from the upper edge of the core material 2 to provide flexibility. Extension part 5 with
was formed.

A flexible board 21 is provided on the back side of the extension portion 5.
is attached over the entire surface and fixed around the circumference by welding, and a weather strip 23 and a grommet 24 are provided at the upper edge of the surface of the extension portion 5 and the insertion opening edge of the lock knob 22, respectively. It is fixed by welding.

In particular, the striped groove patterns 25, 25 shown in FIG.
- indicates a weld line, which is formed into a welder to surround the outer periphery of the skin material 4, and the core material 2 and the above-mentioned flexible board 21 are fixed via the pad material 3. The flexible board 21 is made of a material such as thick hard paper that is not easily deformed by heat and has relatively high rigidity and can be welded with a welder. A large number of striation grooves 21a, 21a are provided along the
... is formed, and the board 21 can be bent in the width direction with each groove 21a as a bending line, giving it flexibility, and the rigidity of the material of the board 21 in the longitudinal direction. As a result, the vertically curved surface of the inner panel can be completely followed, and the door trim 20 can be assembled to that shape. It forms a gently curved surface without closely following the curve, and prevents wrinkles from forming on the skin material 4 due to extreme changes in curvature.

Incidentally, in many cases, the inner panel 7 actually has a swollen periphery at the location where the lock knob 22 is inserted, compared to the state shown in FIG. Therefore, in such a portion, a groove may also be formed in the width direction on the back surface of the board 21 to partially impart flexibility in the width direction.
The weather strip 23 has a strip base 23a made of hard vinyl chloride, and a lip part 2 made of soft vinyl chloride that protrudes from one side of the base 23a.
3b, and a locking part 23c having an L-shaped cross section is formed on the back surface of the base 23a, and each of these parts is formed by two-color extrusion molding and fixed to the extending edge as described above. .

The grommet 24 is also made of hard vinyl chloride and has an eyelet shape.Next, the procedure for assembling the weather strip 23 and grommet 24 to the door trim 20 will be explained using FIG. 8.

FIG. 8 shows a welder mold for forming the door trim 20 (
However, only the lower mold is shown) and the set state of each member constituting the door trim 20.

The welder mold shown in the figure is equipped with a lower mold plate 30, an electrode bar 31 erected on this plate 30, an electrode bar 32 for fixing the weather strip, and an electrode bar 33 for fixing the grommet. An insulating plate 34 is arranged on the upper side of the bar 31.

Note that the electrode bar 31 is actually formed in the groove pattern of the welder line 25 shown in FIG. The grommet fixing electrode bar 33 is formed in an elliptical shape so as to be in contact with the periphery of the grommet 24. , and a concave portion 33a is formed in the center thereof.

To mold a door trim using the mold configured as described above, first the weather strip 23 and the grommet are placed on each electrode bar 32, and then the skin material 4 and the pad material 3 are laminated. Next, after laminating the core material 2 and the flexible board 21 in a predetermined position, the upper mold (not shown) is engaged with the mold, and by printing high frequency, each part is welded and sawed by welding as shown in Fig. 8. The completed state shown in FIG. 4 is achieved.

Note that the side peripheral edges of the skin material 4 and pad material 3 are folded back to the back side of the core material 2 and flexible board 21 using a folding device (not shown) attached to the same mold, and then welded at the same time as described above. By welding, you can complete the product in one shot.

In addition, in order to assemble the door trim 20 configured in this way to the inner panel 7 in the assembly process, the mounting clips 8 are attached to the mounting holes formed in the core material 2 in the preparation stage, and the rest is the same as before. The locking part 23c of the weather strip 23
by hanging on the inner panel 7 and pressing the door trim 20 against the side of the inner panel 7.
The installation is completed as shown in the figure. Furthermore, inner panel 7
In order to strengthen the connection between the inner panel 7 and the extension part 5, locking claws 7c may be formed in advance on the inner panel 7 as shown in FIG. 9, and these may be wedged into each part.

As explained above, in the automobile door trim according to the present invention, the back surface of the construction part is lined with a flexible board that is flexible in the direction of bending, so that the extension part is It prevents expansion and contraction due to temperature differences, allowing it to be assembled to the inner panel with high precision, and does not follow extreme changes in curvature and expands to a gently curved surface, so wrinkles do not form on the surface. This has the advantage of preventing this and improving the appearance when installed.

In addition, in this invention, conventional retrofitted parts such as weather strips and grommets are welded together at the same time as the door trim is formed, making assembly of the door trim simple and reducing the number of steps required when assembling the vehicle body. In particular, since there is no need for mounting hardware on the inner panel side in advance for the weather strip, the number of parts can also be reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing a conventional garnish-less type door trim and its installation state, Fig. 2'' and Fig. 3 are cross-sectional views of the grommet attachment part, and Fig. 4 is a perspective view of the door trim according to the present invention. Figures 5 and 6 are cross-sectional views taken along lines 5-5 and 6-6 in Figure 4, showing an example of attachment to the inner panel. Fig. 8 is a partially sectional perspective view showing a set state of the welder mold for molding the door trim and door trim constituent materials, and Fig. 9 is a partially enlarged perspective view showing an example of the upper structure of the inner panel.・Core material, 3...Bad material, 4...
...Skin material, No. 5...Extension part, 21...
... Flexible board, 23 ... Weather strip, 24 ... Grommet (lock knob grommet), 25 ... Welder line.

Claims (1)

[Claims] 1. The pad material and skin material to be welded to the surface of the plate-shaped core material are extended from the upper edge of the core material, and using the flexibility of these materials, the extended portion is guided along the curved surface of the inner panel of the door. In the automobile door trim to be attached, the back surface of the extension part is lined with a flexible board that is flexible in the direction of bending, and the weather strip and lock knob grommet having means for attaching to the inner panel are attached using high-frequency waves. A door trim for an automobile comprising weldable members, these members being positioned and arranged at the edge of the extension part and the grommet attachment position, and welded and fixed to the front and back surfaces of the extension part, respectively, using a high-frequency welder.