JPH08282397A - Mounting structure for injection moulded product - Google Patents

Abstract

PURPOSE: To reliably mount a pawl for fit-in in an opening through simple tuning operation on the pawl for fit-in when the pawl for fit-in formed at an injection molded product is locked in the opening of a mating part for mounting. CONSTITUTION: In mounting structure wherein a pawl 30 for fit-in protruded from the back of a resin molded product 21 is locked in the opening 12 of a mating part 10, contact ribs 34a and 34b making contact with the edge part 12a of the opening 12 of the mating part 10 are protruded on both sides of the lock surface 33 of the pawl 30 for fit-in. Through simple tuning operation wherein the rib heights of the ribs 34a and 34b are varied by taking parallelism of the lock surface 33 of the pawl for fit-in and parallelism of the edge 12a of the opening 12 into consideration, reliable mounting freed from a backlash of the pawl 30 for fit-in is practicable through simple tuning operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection-molded body mounting structure in which a fitting claw provided on the back surface of an injection-molded body is engaged and mounted in an opening of a mating component.

[0002]

2. Description of the Related Art In a vehicle interior, relatively large interior parts such as a door trim and a rear side trim are mounted on a vehicle body panel, and various uses and design are improved at predetermined places on the surface of these large interior parts. In order to achieve this, a small part made of an injection molded body is generally attached.

Conventionally, these injection molded products are attached to other parts such as interior trim parts and vehicle body panels such as door trims and rear side trims, which are mating parts, using resin clips or metal clips in the past. 7 and 8, a pair of fitting claws 2 extending in the mounting direction are formed on the back surface of the injection-molded body 1 so as to protrude.
By inserting the fitting claw 2 into the opening 4 of the mating part 3, the locking surface 2a of the fitting claw 2 and the edge 4a of the opening 4 are engaged, and the injection molded body 1 is fitted to the mating part 3. Is fixed securely.

[0004]

However, when the fitting claw 2 provided on the injection-molded body 1 is inserted and fixed in the opening 4 of the mating component 3, the locking surface 2a of the fitting claw 2 and the opening 4 are formed. It has been pointed out that there is no guarantee of parallelism with the edge portion 4a, rattling is likely to occur, and a reliable mounting strength of the injection molded body 1 cannot be obtained.

As a countermeasure against this, the engaging surface 2a of the fitting claw 2
It is also practiced to add a thickness of about 0.5 mm to reduce backlash, but such tuning must be done parallel to the mating parts, and the dimensions must be partially confirmed. Since it is difficult to perform, precise tuning operation cannot be expected.

The present invention has been made in view of the above circumstances, and an attachment structure of an injection molded body to be mounted by engaging a fitting claw provided on the back surface of the injection molded body in the opening of the counterpart component. In the above, it is an object of the present invention to provide a mounting structure for an injection molded body, in which the engaging force of the fitting claw can be easily tuned and a firm mounting strength of the injection molded body can be obtained.

[0007]

In order to achieve the above object, the present invention attaches a fitting claw projectingly formed on the back surface of an injection-molded body molded into a required shape into an opening of a mating component. In the mounting structure of the injection-molded body to be mounted, contact ribs capable of varying the rib height are projected from both sides of the engagement surface of the fitting claw to the opening edge.

Further, according to the present invention, the extension ribs which are connected to the abutment ribs protruding from both sides of the engaging surface of the fitting claw and extend upward along the outer surface of the leg of the fitting claw are integrated. By doing so, it is possible to tune vertically and horizontally.

[0009]

As is apparent from the above construction, the contact ribs are provided on both sides of the engaging surface of the fitting claw projectingly provided on the back surface of the injection-molded body, which may cause a mounting error of the injection-molded body or a mating component. When it is not possible to maintain the parallel state between the edge of the opening of the mating part and the locking surface of the fitting claw due to dimensional error of the injection molded body, cut or build up the contact rib on either side to open the opening. The edge and the contact ribs on both sides contact,
There is no backlash.

Further, if the contact ribs provided on the locking surface are extended upward, not only vertical tuning but also longitudinal or lateral tuning is possible.

[0011]

Embodiments of the mounting structure for an injection molded body according to the present invention will be described below in detail with reference to the accompanying drawings.

In the embodiments described below, an injection molded body is applied to a resin core material of an armrest upper, and an automobile door trim is exemplified as a counterpart part to which the injection molded body is attached.

FIG. 1 is an external view showing an automobile door trim equipped with an armrest upper, FIG. 2 is an explanatory view showing a mounting structure of an armrest upper which is a main part of the present invention, and FIGS. The mounting structure is applied to the mounting structure of an armrest upper, and is an explanatory view and a sectional view, respectively.

First, a first embodiment of the present invention will be described.

In the figure, reference numeral 10 is an automobile door trim, and an armrest lower 11 which is formed in a bulge shape toward the inside of the room is set at substantially the center.

On the upper surface of the armrest lower 11, an armrest upper 20 having a good cushioning property and a feeling of touch is mounted so that an occupant can rest on his / her elbow.

As shown in FIG. 2, the armrest upper 20 has a resin core 2 made of a synthetic resin injection molded body.
A pad material 22 such as a polyurethane foam that provides cushioning properties is laminated on the surface of No. 1 and the product surface is covered with a skin material 23 such as a cloth or a synthetic resin sheet.

In order to mount the armrest upper 20 on the upper surface of the armrest lower 11 of the door trim 10, a plurality of fitting claws 30 are formed on the back surface of the resin core material 21 at predetermined intervals along the longitudinal direction. And
In order to engage the fitting claw 30, a rectangular opening 12 is formed on the upper surface of the armrest lower 11 of the door trim 10 at a position corresponding thereto.

By the way, a feature of the present invention is that even if there is an error in mounting the armrest upper 20 or a dimensional error in the armrest upper 20 or the door trim 10, the armrest upper 20 is securely mounted to the door trim 10 without rattling. It is in the mounting structure of the armrest upper 20 that makes it possible.

That is, the fitting claw 30 is provided with a pair of plate-shaped leg pieces 31 projecting vertically as shown in an enlarged view in FIG. 2, and both outer side surfaces of each leg piece 31 are inside the opening 12. The guide surface 32 is formed so that it can be easily inserted into, and the locking surface 33 that locks with the edge 12a of the opening 12 is set.

Further, on both sides of the locking surface 33, the contact ribs 34 (34) that actually contact the edge 12a of the opening 12 are provided.
The feature is that a, 34b) are formed in a protruding manner.

Next, the tuning operation of the fitting claw 30 will be specifically described with reference to FIGS.

First, the edge portion 1 of the opening 12 on the door trim 10 side
When the 2a and the locking surface 33 of the fitting claw 30 are in parallel with each other, there is no problem because the tip end surface of the contact rib 34 of the fitting claw 30 abuts the edge 12a of the opening 12.

However, as described above, in many cases, the edge 12a of the opening 12 and the engaging surface 33 of the fitting claw 30 are not parallel to each other due to a mounting error or a dimensional error.

In that case, if a reference line A parallel to the locking surface 33 of the fitting claw 30 is set and the error between the reference line A and the line B of the edge 12a of the opening 12 is c, In the contact ribs 34a, 34b of the fitting claw 30, the tip end surface of the contact rib 34a on one side is scraped off to set the rib height to a small value, and the rib height of the contact rib 34a on one side is set to a and the contact rib 34b on the other side is set. If the rib height is b, and a tuning operation is performed so that b−a = c, as shown in FIG. 4, the contact ribs 34a and the contact ribs 34a provided on both sides of the locking surface 33 of the fitting claw 30 are provided. 34b is a door trim 1
Since it comes into contact with the edge portion 12a of the opening 12 of 0, rattling does not occur, and firm attachment strength of the armrest upper 20 can be guaranteed.

Instead of cutting the contact ribs 34a on one side, the contact ribs 34b on the other side may be overlaid.

Thus, according to the present invention, the fitting claw 3
By tuning the contact ribs 34 provided on both sides of the locking surface 33 of 0, a firm attachment strength of the arm thread upper 20 can be obtained by a simple method. There is an additional advantage that dimensional errors of the core material 21 and the door trim 10, mounting errors of the armrest upper 20 and the like can be effectively absorbed by this tuning operation.

Next, FIGS. 5 and 6 show a second embodiment of the present invention. In this embodiment, the contact ribs 34 provided on both sides of the locking surface 33 are applied to the outer surface of the leg piece 31. The extension ribs 35 are connected to each other to form a substantially L-shaped contact rib 34 and extension rib 35.

That is, the shape of the opening 12 is the door trim 1.
In the case where the opening edge portions 12a are not parallel to each other due to the setting of the die taper θ in the die cutting of 0, for the vertical tuning like the first embodiment, the contact ribs 34 located on both sides of the locking surface 33 are used. By performing the tuning operation and adjusting the rib height of the extension rib 35 located on the outer surface of the leg piece 31, horizontal tuning is possible.

Specifically, when the draft taper θ is set in the opening 12, an error indicated by d in the figure occurs, but as shown in FIG. 6, one side of the extension ribs 35a and 35b is scraped off by d. Assuming that the rib height of the side 35a is e and the rib height of the extension rib 35 on the other side is f, if tuning is performed so that f-e = d, even if an error due to the draft taper occurs, the fitting is performed. The combination claw 30 does not rattle in the horizontal direction, and can be securely engaged in the opening 12.

In the embodiment described above, when the armrest upper 20 is mounted on the upper surface of the armrest lower 11 of the door trim 10, the resin core material 21 which is an injection molded body is used.
Although the fitting claw 30 provided on the back surface is applied to the structure for mounting the fitting claw 30 in the opening 12 on the upper surface of the armrest lower 11, injection moldings such as various escutcheons and step lamp housings are mounted on the counterpart parts such as the door trim, the rear side trim, and the vehicle body panel. It can also be applied to a structure, and its application is not particularly limited as long as the fitting claw provided on the back surface of the injection molded body is engaged in the opening of the counterpart component.

[0032]

As described above, the injection-molded body mounting structure according to the present invention has the following special operational effects.

(1) According to the first aspect of the present invention, the contact ribs are provided on both sides of the engaging surface 33 of the fitting claw 30 projecting from the back surface of the resin molded body, and the rib height of the contact ribs. By adjusting, the fitting claw can be securely attached to the opening without rattling in the vertical direction, so that there is an effect that a firm mounting strength without rattling in the vertical direction can be guaranteed.

(2) According to the first aspect of the present invention, the contact ribs are provided on both sides of the engaging surface of the fitting claw, and the rib height of the contact ribs is adjusted appropriately, whereby the inside of the opening of the mating component is Since the fitting claw can be securely attached without rattling, even if there is a dimensional error in the injection molded body or the mating component, or an installation error in the injection molded body, these errors can be corrected by tuning the contact ribs. It has the effect that it can be effectively absorbed.

(3) According to the second aspect of the present invention, the contact ribs are provided on both sides of the engaging surface of the fitting claw, and the extension ribs extending from the contact ribs are provided on both sides of the leg piece. By tuning the rib height of
Not only the rattling of the fitting claws in the vertical direction but also the rattling in the horizontal direction can be reliably prevented, and it is possible to more reliably attach the injection molded body.

[Brief description of drawings]

FIG. 1 is an external view showing a vehicle door trim equipped with an armrest upper.

FIG. 2 is an explanatory view showing a structure for mounting an armrest upper to a door trim to which the mounting structure according to the present invention is applied.

FIG. 3 is an explanatory view showing a tuning operation of a contact rib according to the present invention.

FIG. 4 is a sectional view showing the operation of the tuning operation according to the present invention.

FIG. 5 shows a second embodiment of the present invention and is an explanatory view applied to a structure for attaching an armrest upper to a door trim.

FIG. 6 is an explanatory diagram showing a tuning method in the second embodiment of the present invention.

FIG. 7 is an explanatory view showing a conventional mounting structure for an injection molded body.

FIG. 8 is a cross-sectional view showing a conventional mounting structure for an injection molded body.

[Explanation of symbols]

 10 Car Door Trim 11 Armrest Lower 12 Opening 12a Edge 20 Armrest Upper 21 Resin Core Material 30 Fitting Claw 31 Leg 32 Guide Surface 33 Locking Surface 34, 34a, 34b Abutment Rib 35, 35a, 35b Extension Rib

Claims (2)

[Claims] 1. An injection-molded body (2) molded into a required shape.
1) In a mounting structure of an injection molded body, in which a fitting claw (30) protrudingly formed on the back surface of the fitting part is engaged and mounted in an opening (12) of a mating component (10). 12) Edge (12
An attachment structure for an injection-molded body, characterized in that projection ribs (34) whose rib height can be varied are provided on both sides of a locking surface (33) for a). 2. The outer surface of the leg (31) of the fitting claw (30) is connected to the contact ribs (34) projecting from both sides of the locking surface (33) of the fitting claw (30). The mounting structure for an injection-molded body according to claim 1, wherein tuning is possible in the vertical direction and the horizontal direction by integrating extension ribs (35) extending upward along the same.