JPS59121213A - Connecting section structure of part made of resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking part structure for a resin part, for example, a locking part structure for a resin part used in the interior of an automobile.

Examples of resin parts include door trims, pillar garnish finishers, etc. FIG. 1 is a perspective view of an automobile to which such resin parts are attached. Here, the structure of the locking part of the resin part attached to the center pillar will be explained.

Examples of conventional locking portion structures for resin parts include those shown in FIGS. 2 and 3, for example. The center pillar 1 is constructed by welding an inner panel 2 and an outer panel 3, and the welded ends are covered with a welt 8. The inner panel 2 is covered with a pillar garnish 4.

Pillaga 12 nonyu 4 is composed of a main body 5 having a plate shape curved toward the outdoor side in the width direction, a protrusion 6 protruding from one surface (outdoor side) of the main body 5, and a height-maintaining protrusion 7. The pillar garnish 4 is attached to the center pillar 1 by engagement between a hole 2a formed in the inch panel 2 and a locking claw 6a formed at the tip of the projection 6. 6b
9t10 is a reinforcing rib formed integrally with the projection 6, and 9t10 is a front door and a rear door, respectively. 11, 12
, 13 are a door sash, a weather strip, and a window glass, which constitute the front door 9 and the rear door 10, respectively.

However, in such a conventional locking structure of resin parts, when an occupant gets on or off the vehicle, an impact force is applied to the protrusion 6 in the opposite direction to the protruding direction of the locking pawl 6a due to contact with the garnish 4, etc. When an impact force is applied, the protrusion 6 is elastically deformed because the impact force is supported to a certain extent by the reinforcing rib 6b, but when an impact force exceeding the elastic limit is applied, the protrusion 6 deforms at two points. K is the protruding base and the reinforcing rib 6b may be plastically deformed at the position indicated by the chain line.
There was a problem that everything would break.

This invention was made by focusing on such conventional problems, and a stopper that engages with a projection within the elastic deformation region of the projection is connected to the component body on the opposite side of the protrusion from the protruding direction of the locking claw. It is an object of the present invention to solve the above-mentioned problems by using a locking part structure of an integrally provided resin part.

The present invention will be explained below based on the drawings.

In the drawings, members that are the same as those in the conventional example are given the same reference numerals and redundant explanations will be omitted.

FIG. 4 and FIG. 5 are diagrams showing a first embodiment of the present invention. First, to explain the structure, the pillar garnish 14 attached to the center pillar 1 includes a garnish body 15, a protrusion 16, a stopper 18, and a height holding protrusion 17 that are integrally formed of resin. The garnish main body 15 has a plate shape, and both ends in the width direction are curved downward in the figure. On one surface of the curved side of the garnish body 15, there is a protrusion 16 having a locking claw 16a that engages with a hole 2a formed in the inner panel 2.
is provided protrudingly, and the locking pawl 16a protrudes toward the approaching end in the width direction. When a load or the like is applied to this projection 16 in a direction opposite to the protruding direction of the locking pawl 16a, the projection 16 is engaged with the projection 16 within an elastic deformation region where the projection 16 bends and deforms. A stopper 18 for preventing deformation is provided to protrude integrally with the garnish body 15 on the opposite side of the protrusion 16 from the protruding direction of the locking claw 16a. And the stopper 18 has a protrusion 164! : They are parallel. 18a is a reinforcing rib formed integrally with the stopper 18. Reference numerals 17 denote height-maintaining protrusions that are provided on one surface of the garnish body 15 at positions on both ends in the width direction with the protrusions 16 as boundaries. As shown in the figure, such a pillar garnish 14 is attached to the center villa 1 by engaging the locking claw 16a with the hole 2a of the panel 2, with its upper surface facing indoors and covering the inner panel 2. .

As mentioned above, pillar garnish 14 is from center pillar to 1
If an impact force exceeding the elastic limit is applied in the opposite direction to the protruding direction of the locking pawl 16a while the projection 16 is attached to the projection 16a, the projection 16 deforms and the fifth It comes into contact with the stopper 18 as shown by the two-dot chain line in the figure. When the protrusion 16 comes into contact with the stopper 18, the impact force that acts on the protrusion 16 and causes it to deform is transferred to the stopper 18.
Since the projection 16 is transmitted and absorbed by the stopper 18, the projection 16 is supported by the stopper 18.

At this time, the protrusion 16 is neither plastically deformed nor broken. Then, when these forces are released, the restoring force returns the object to its original state. Therefore, the garnish 14 remains attached due to the engagement between the locking claw 16a and the hole 2a of the panel.

On the other hand, although the stopper 18 is also deformed by the aforementioned force transmitted and absorbed by the stopper 18, this force is
6 is weakened by elastic deformation, the stopper 18 is elastically deformed similarly to the protrusion 16, and returns to its original state when this force is released.

Note that when an impact force is applied in the direction in which the locking pawl 16a protrudes, the protrusion 16 is prevented from being deformed by the hole 2a of the panel 2.

FIGS. 6 and 7 are diagrams showing a second embodiment of the invention. This embodiment has a power window switch fin No. A on the door +1 armrest) 32.
-34, the structure of the stopper 28 and its function are different from those of the first embodiment.

In the figure, 36 is a power window unit, 36a is a power switch, 32a is an armrest core material, 32b is a band, 32c is a skin, 38 is a boss 36b formed on the unit 36. Insert the unit 36 from the side of the core material 32a and attach the unit 36 to the armrest. 32 shows the screw that fixes it.

This strain bar 28 is made up of a stopper body 29 which is struck by the finisher body 34aK parallel to the protrusion 16, and a contact piece 3o extending at right angles from the stopper body 29. It is formed to engage the projection 16 within the area.

This stopper 28 is not provided with a reinforcing lip, but by forming the stopper body 29 somewhat thicker, it also functions as a reinforcing lip. When the elastically deformed protrusion 16 comes into contact with the contact piece 30, the applied impact force is absorbed and transmitted to the strike collar body 29 via the contact piece 30. The rest is the same as the first embodiment, so
The explanation will be omitted.

As described above, according to the present invention, a stopper that engages with a projection within the elastic deformation region of the projection is provided integrally with the component body on the opposite side of the projection from the direction in which the locking claw protrudes. Because of the locking part structure, even if an impact force that exceeds the elastic limit is applied to the protrusion in the opposite direction to the protruding direction of the locking pawl, this force will be divided between the stopper and the protrusion, and will not act on the protrusion. The force acting on the protrusion is weakened, so the protrusion does not undergo plastic deformation or breakage. Therefore, the durability of the protrusion is improved, and since the resin component does not come off from the mounting member, the integrity of the interior decoration is not impaired.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a car with resin parts attached;
Figures 2 and 3 show a conventional example; Figure 2 is a sectional view taken along the line H-H in Figure 1; Figure 3 is an enlarged view of the main part of Figure 2; Figures 4 and 5 are , shows a first embodiment of the invention, FIG. 4 is a sectional view similar to FIG. 2, FIG. 5 is an enlarged view of the main part of FIG. 4,
6 and 7 show a second embodiment of the present invention, FIG. 6 is an overall perspective view of the door trim, and FIG. 7 is a second embodiment of the present invention.
■It is an enlarged cross-sectional view. 2...Panel (mounting member), 14...Garnish (resin part) 15...Garnish body (component body), 16...Protrusion, 16a...Locking claw, 18.28
...Stopper. Applicant: Nissan Motor Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a locking part structure of a resin component in which a projection having a locking pawl is integrally provided on one surface of the component body, and the locking pawl engages with and is attached to a mounting member, the elastic deformation of the projection is provided. A locking part structure for a resin component, characterized in that a stopper that engages with the projection within a region is provided integrally with the component main body on a side of the projection opposite to the direction in which the locking claw protrudes.