JP3112152B2 - Cover mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an opening in a resin product,
The present invention relates to a mounting structure for closing a notch or the like with a cover body.

[0002]

2. Description of the Related Art As a general structure for closing an opening, a notch or the like provided in a resin product with a cover body, a plurality of locking claws are provided on the cover body to lock the periphery of the opening, the notch or the like.
There is known a structure in which the locking claw is elastically deformed and locked to a periphery of the opening, notch, or the like to be attached. A step is formed in the peripheral portion of the opening, notch, etc., and the cover body is placed and fixed on the step so that each locking claw is flush with the surface of the resin product when the locking claw is locked to the peripheral edge of the opening. Thus, the opening and the notch are closed. At this time, in order to reliably lock the locking claw with the predetermined locking strength to the periphery of the opening, the notch, or the like, the locking portion of the locking claw is generally formed in advance and the opening edge is formed. And a sufficient locking surface with the locking claw. In this case, when the locking claw surface of the locking claw abuts when passing through the opening, it is greatly elastically deformed, but after the locking claw is locked in the opening, the elastic deformation of the locking claw is in its original shape. Upon return, the opening edge comes into contact with the main body of the locking claw, or a minute gap is formed.

[0003] For such a mounting structure, for example,
A mounting structure described in U.S. Pat. No. 4,167,447 is also known. This publication discloses an attachment structure for attaching a cover such as a speaker grill to an interior component such as an automobile door trim. In this mounting structure, an opening is formed at a corner of the interior component, and the cover body is
In order to close and fix the opening while bending in the shape of a letter, locking strength is not obtained only with the above-described locking claw, and a mounting piece having a notch is provided at one of the opening edges opposed to the corner, A boss protrudes from one end of the cover body facing the mounting piece, and a grip is provided on the other end of the cover body. Further, according to the publication, a reinforcing rib is provided around the mounting piece to enhance the rigidity of the mounting piece. The attachment is performed by inserting the boss into the notch of the attachment piece and fixing the boss by crimping, and fixing the other end edge of the opening by the grip.

[0004]

However, according to the cover mounting structure of the above-mentioned general locking claw, in order to secure a required locking strength, the locking portion is made unnecessarily large. It is required to form, and even if it is temporary at the time of locking, a force exceeding the elastic limit may act on the locking claw,
Furthermore, in order to eliminate rattling after locking, it is necessary to minimize the gap between the opening edge and the locking claw body. Therefore, not only high-precision processing is required for manufacturing the opening edge and the locking claw, but also the cost is increased.

On the other hand, according to the cover mounting structure disclosed in the above publication, the rigidity of the mounting piece is strengthened and the mounting strength of the boss by crimping becomes easier to secure, but the cover is mounted on the cover from the back surface to the front surface. usual caulking portion when an external force is applied is easily pulled out from the notch of the mounting piece directed, if when the mounting of the caulking portion is made rigid, the possibility that grip formed on the other ends deviates from the opening There is.

The present invention has been made in view of such circumstances, and specifically, it is not necessary to make the locking portion larger than necessary, and the required locking strength is not required without special manufacturing accuracy. It is an object of the present invention to provide a cover mounting structure having a simple structure that can be secured.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to have a plurality of locking claws on one of a cover and an opening of a resin product , and to have the locking claw on the other of the cover and the opening of the resin product. Has an engagement receiving portion for locking, and has a guide portion at one of the opening of the cover body and the resin product , and the guide portion engages with the other of the cover body and the opening of the resin product. A mounting structure of a cover body having a guide receiving portion and a resin product, wherein a part of the plurality of locking claws is elastically deformed in a predetermined direction to engage with the engagement receiving portion, claw is locked elastically deformed in the direction opposite to the elastic deformation direction of the front
The guide portion has an inclined surface with respect to the guide receiving portion.
The inclined surface is used to engage the guide portion with respect to the guide receiving portion.
At the time between the opening edge of the resin product and the cover body
This is achieved by a cover body mounting structure characterized by having a function of urging in a direction to eliminate the gap .

In other words, some of the locking claws are provided so as to be elastically deformed in a predetermined direction, and when engaged, are locked in the corresponding locking receiving portions of the resin product while bending in one predetermined direction. The other locking claw is provided so as to elastically deform in a direction opposite to the predetermined direction, and when engaged, bends in a direction opposite to the predetermined direction and engages with a corresponding locking receiving portion of the resin product. Is stopped. At this time, one locking claw and the other locking claw are elastically deformed in opposite directions, and these two locking claws are further elastically deformed by receiving a reaction force from the locking receiving portion and mutually deformed. The locking strength of the locking claw is increased or at least acts in a direction that does not decrease to secure the locking strength of the cover body. In particular, when two or more pairs of locking claws are used, when the locking claws located close to each other act to increase the locking strength mutually, the locking claws in the length direction of the cover body and the like are reduced. Flexural deformation can be minimized.

[0009] More preferably, the engaging surface of the guide portion with respect to the guide receiving portion is an inclined surface, so that, for example, the guide receiving portion of the resin product strengthens the engagement with the locking claw of the cover body, Alternatively, since the opening or notch or the like to which the cover is attached is prevented from expanding or deforming, the cover is loosened or dropped when the cover is engaged, and rattling due to an increase in the gap is further prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to typical embodiments shown in the accompanying drawings. FIG. 1 shows the appearance of a front bumper protector 10 to which the present invention is applied.

[0011] The front bumper protector body 11 has a central portion 11a having characters engraved on its surface, a plate attaching portion 11b for fixing a license plate disposed below the front bumper protector body, and a horizontal extending frontward from left and right ends. Left and right bulging ends 11c, 11c, which protrude smoothly, and U-shaped cutouts 12, 12 formed on the upper surfaces of the left and right ends,
A screw insertion hole 11d for mounting the front bumper protector body 11 with a screw or the like on a mounting bracket formed on the left and right end surfaces and rising from a bumper (not shown),
It is formed symmetrically as a whole. Notch 1 on left and right
Reference numerals 2 and 12 denote masks 21 and 21 which are cover bodies of the present invention.
Are attached to the front bumper protector body 11 by screws (not shown), first to third locking claws 22a to 22c (described later), and a pair of left and right guide pieces 23a and 23b. 1
Block 2 and 12.

FIG. 2 is an exploded perspective view showing the right end portion of the front bumper protector when the mask is attached. The notch 12 is formed at a position facing an end opening of an inner reinforcement (not shown) that stands up in an L shape. By attaching a mask (not shown) having a circular hole to the end opening, a guard bar (not shown) can be fitted and attached to the end opening. When the guard bar is not attached, the mask 21 is fitted into the U-shaped cutouts 12, 12, and the end opening of the inner reinforce is closed so that the upper portion is flush with the upper surface, thereby enhancing the appearance.

The notch 12 has an upper edge formed in a substantially U-shape as described above, and a mounting step having an open end having a step lowered by a predetermined height from an upper edge of the front bumper protector 10. The plate parts 13 and 14 are horizontally extended, and a part of the mounting plate parts 13 and 14 is formed by entering the front bumper protector body 11 at the open end. Square holes 13b, 14b, and 14c and a screw insertion hole 13c. Each of the masks 21 has a shape that fits into the notch 12, and a tab 21d of the mask 21 is provided with a screw insertion hole 21d 'to form a U-shaped flat plate 21a.
The first and second locking claws 22a and 22b each having a locking portion at the tip toward the lower side are provided on the peripheral edge on the right side (the front side in FIG. 2), and the peripheral edge 21b on the left side of the flat plate portion 21a is provided on the distal end. A third locking claw having a locking portion is provided with a projection 22c protruding downward, and a pair of guide pieces 23a, 23b forming a guide portion of the present invention are provided on the substantially central peripheral edges of the left and right sides of the flat plate portion 21a. Each is protruding. The lengths of the first to third locking claws 22a to 22c are set to be longer than the guide pieces 23a and 23b.

Hereinafter, the front bumper protector 11
Will be described, but the left side has the same structure and is symmetrical. FIG. 3 is a sectional view showing the locked state of the first and third locking claws 22a and 22c.
The first and third locking claws 22a and 22c are provided in pairs at the left and right edges on the front end side (the front side in FIG. 2) of the mask 21, and are opposed to the left and right mounting plate sections 13 and 14. Edge 1
3a and 14a are engaged from the inside. In the illustrated example, the first and third locking claws 22a, 22c are locked after the locking ends, as shown in FIG. 13a and 14a are in a state where a minute gap is formed.

Next, the procedure for mounting the entire mask 21 in this embodiment will be described. Width W of rear end 21c of mask 21
2 is formed slightly smaller than the width W1 of the open end of the notch 12. The mask 21 is fitted into the notch 12 from above. At this time, the rear end 21c of the mask 21 is slightly lifted to make the front end 21b the front end face 1 forming the deepest part of the notch 12.
2a, and gradually lowers the rear end 21c so that the locking claws 22a to 22c and the guide pieces 23a, 23a
3b is locked in each locking portion of the cutout portion 12, and is mounted and fixed in a completely fitted state. The locking procedure is as follows.
First and third locking claws 22a, 2 provided at the front end of
2c is locked from the inside to the edges 13a, 14a of the left and right mounting plate portions 13, 14 as described above (FIG. 4). At this time, the locking portions of the first and third locking claws 22a, 21c have the same edges 12c, 12d with a small gap D1 between the edges 13a, 14a of the left and right mounting plate portions 13, 14. Passed and located below.

Subsequently, the first to third locking claws 22a to 22a
Since the length c is set to be longer than each of the guide pieces 23a and 23b, the leading end locking portion of the second locking claw 22b is inserted into the square hole 14b prior to the guide pieces 23a and 23b. The front end locking portion is pushed by one side surface of the square hole 14b and passes through while being elastically deformed. At this time, a gap D2 is formed between the outer peripheral edge of the mask 21 and the edge 12a of the notch 12 as shown in FIG. Is formed. During this locking, when the locking portion of the second locking claw 22b is further pushed completely below the square hole 14b, the entire locking claw 22b is elastically deformed due to the reaction force of the elastic contact surface. When the shape of the locking claw 22b is set to the above, a sufficient locking force is generated by itself.

In the present embodiment, following this state, the guide pieces 23a and 23b are formed in the respective square holes 13b and 14c.
Insert The projecting positions of the guide pieces 23a and 23b are shifted from the centers of the square holes 13b and 14c to the left and right (left and right in FIG. 6), and are formed as inclined surfaces 23c whose sides in the direction of the shift are narrowed downward. ing. Therefore, as shown in FIG. 6, when the guide piece 23a is inserted into the square hole 14c and the inclined surface 23c descends while contacting one end surface of the square hole 14c, the inclined surface 23c presses the end surface of the square hole 14c. Then, the notch 12 is moved in the direction A indicated by the arrow in FIG.

At the same time, the other guide piece 23b acts in the same manner, and deforms so as to reduce the width W1 of the notch 12 in the direction of the arrow AA 'shown in FIG. The width W1 of the notch 12 is reduced as a whole, so that the first to third locking claws 22a to 22c are formed between the edges of the mounting plates 13, 14 and the notch 12. The gaps D1 and D2 are eliminated, and the locking claws 22a to 22c
Is secured, and a large securing strength is secured.
Further, by moving downward of the second engaging claws 22c when the width W1 of the notch 12 is reduced, the lower surface of the mask 21 is in close contact with the upper surface of the mounting plate portions 13 and 14, the gap D1 , D2 are eliminated, and the mask 21 is tightly fitted in the notch 12, so that a strong and beautiful attachment is achieved.

As is clear from the above description, the present invention is not limited to the above-described front bumper protector, but also includes a cover for closing an opening of another resin component, a grill attached to an instrument panel, etc. (eg, a defroster grill). Of course, it can be applied to such as. In this case, it can be applied in combination with the conventional mounting structure of welding boss, resin clip, screw, etc.
The position of the guide piece does not need to be at a position orthogonal to and opposed to the opposing side. In the case where the expansion in two directions intersecting with the opposing side at a predetermined intersection angle occurs, the guide piece is moved in each of these directions. It can also be installed to prevent deformation.

[0020]

Since the present invention has the above-described configuration, when the locking claws of the cover body are locked to the corresponding locking receiving portions of the resin product, some of the locking claws are fixed to predetermined positions. These two types of locking claws increase the locking strength of the other locking claws mutually because the other locking claws elastically deform in the direction and the other locking claws elastically deform in a direction opposite to the predetermined direction. Or at least it acts in a direction not to be reduced, so that the required locking strength of the cover body can be secured. In particular, when two or more pairs of locking claws are used, the locking claws located close to each other act to increase the locking strength of each other, and also bend in the length direction of the cover body and the like. Can be minimized.

Further, according to the present invention, by providing a guide portion in addition to the above configuration, the guide receiving portion of the resin product further enhances engagement with the cover member, or expands an opening or notch or the like to which the cover member is attached. Because it acts to prevent opening and deformation, even if the cover body is loosened or
And an increase in the gap can be prevented. Therefore, the shape and dimensions of the cover body and the locking claw are formed in advance so that they can be easily locked, and the engagement of the guide portion can be used to firmly reduce gaps and the like. Is improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a front bumper protector showing a typical embodiment of the present invention.

FIG. 2 is an exploded perspective view of an end of the front bumper protector.

FIG. 3 is a cross-sectional view showing an initial engagement state of a part of the front bumper protector main body and a mask.

FIG. 4 is a cross-sectional view showing a state at the time of starting the engagement between the front bumper protector body and the mask.

FIG. 5 is a sectional view showing an initial engagement state of another part of the front bumper protector body and the mask.

FIG. 6 is a cross-sectional view illustrating an engagement state between a front bumper protector body and a guide piece.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Front bumper protector 11 Front bumper protector main body 11a Central part 11b Plate mounting part 11c Left and right bulging part 11d Screw insertion hole 12 Notch part 13, 14 Mounting plate part 13a, 14a Edge 13b, 14b, 14c Square hole 13c, 21d 'Screw insertion Hole 21 Mask (cover body) 21a Flat plate portion 21b Front end portion 21c Rear end portion 21d Tab portion 22a to 22c First to third locking claws 23a, 23b Guide pieces

Claims (2)

(57) [Claims] 1. A method according to claim 1, wherein one of the cover and the opening of the resin product has a plurality of locking claws, and the opening of the cover and the resin product is provided.
And the other of the cover and the opening of the resin product have a guide portion at one of the opening , the other of the cover and the opening of the resin product And a cover structure having a guide receiving portion with which the guide portion engages and a resin product, wherein a part of the plurality of locking claws is elastically deformed in a predetermined direction.
Engaged with the engagement receiving portion Te and the other engaging claw is engaged elastically deformed in the direction opposite to the direction of elastic deformation of the said guide
The portion has an inclined surface with respect to the guide receiving portion, and
The inclined surface is at the time of engagement of the guide portion with the guide receiving portion.
The gap between the opening edge of the resin product and the cover body
A cover mounting structure having a function of urging in a direction in which the cover body is eliminated . 2. The mounting structure according to claim 2, wherein an engagement surface of said guide portion with respect to said guide receiving portion is an inclined surface.