JPH0979228A - Mounting structure of cover body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the extent of required locked strength by engaging a part out of plural pieces of locked claws with a guide receiving part in a state of being elastically deformed in the specified direction and the other locked claw in a state of being elastically deformed in the opposite direction, respectively. SOLUTION: Locked claws 22a and 22c of a mask 21 is locked with end edges 13a and 14a of adapter plate parts 13 and 14. Since a length of these locked claws 22a to 22c is longer than that of guide pieces 23a and 23b, a tip locked part of the locked claw 22b is inserted into a square hole 14b prior to these guide pieces 23a and 23b, and this tip locked part is pressed by a side face of the square hole 14 and thereby it passes through therefrom as being elastically deformed. Successively these guide pieces 23a and 23b are inserted into square holes 13b and 14c. Since each projecting position of these guide pieces 23a and 23b is dislocated left and right from the center of these square holes 13b and 14c and the side face is inclined, this incline presses an end face of the square hole 14c, shifting a notch part 12 to some extent. The guide piece 23b also acts likewise, contracting a range of width W1 of this notch part 12. Accordingly, clearance between the locked claws 22a to 22c and the adapter plate parts 13, 14 and the respective end edges of notch part 12 is gone, and thus the extent of large locked strength is secured.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an opening of a resin product,
The present invention relates to a mounting structure in which notches and the like are closed with a cover body.

[0002]

2. Description of the Related Art As a general structure for closing an opening, a notch or the like formed in a resin product with a cover body, a plurality of locking claws for locking the periphery of the opening, the notch or the like are provided in the cover body,
A structure is known in which the locking claws are elastically deformed and locked and attached to the peripheral edge of the opening, notch or the like. A step is formed at the peripheral edge of the opening, notch, etc., and when each locking claw is locked to the opening peripheral edge, the cover body is placed and fixed on the step so that it is flush with the surface of the resin product. The openings, notches, etc. are closed. At this time, in order to surely lock the locking claw to the peripheral edge of the opening, notch, etc. with a predetermined locking strength, the locking part of the locking claw is usually formed large in advance, and Sufficient locking surface with the locking claw. In this case, the surface of the engaging portion of the engaging claw abuts and elastically deforms significantly when passing through the opening, but after the engaging claw engages with the opening, the elastic deformation of the engaging claw returns to 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.

For such a mounting structure, for example, Japanese Patent Publication No.
The mounting structure described in JP-A-41674 is also known. The publication discloses a mounting structure for mounting a cover body such as a speaker grill to an interior part such as an automobile door trim. In this mounting structure, an opening is formed at the corner of the interior part, and the cover body is L-shaped.
Since the opening is closed and fixed while being bent in a letter shape, locking strength cannot be obtained only by the above-mentioned locking claws, while a mounting piece having a notch is provided on one of the opening edges facing each other across the corner, A boss is provided at one end of the cover body facing the mounting piece, and a grip is provided at the other end of the cover body. Further, according to the publication, a reinforcing rib is provided around the mounting piece in order to strengthen the rigidity of the mounting piece. The attachment is performed by inserting the boss into the notch of the attachment piece and caulking and fixing the other end edge of the opening with the grip.

[0004]

However, according to the cover body mounting structure using the above-described general locking claws, in order to secure a required locking strength, the locking portion is made larger than necessary. Forming is required, and even if it is temporary at the time of locking, a force exceeding the elastic limit may act on the locking claw,
In addition, in order to eliminate rattling after locking, it is necessary to prevent a gap between the opening edge and the locking claw body as much as possible. 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 body mounting structure disclosed in the above publication, the rigidity of the mounting piece is strengthened and the mounting strength due to the caulking of the boss can be easily ensured. If an external force is applied, the caulking part will still easily come out of the notch in the mounting piece, and if the caulking part is firmly attached, the gripper provided at the other end may come off the opening. There is.

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

[0007]

The above object is to provide a plurality of locking claws on one of the cover body and the resin product, which are the main components of the present invention, and to lock the other of the cover body and the resin product. A cover having an engagement receiving portion with which the claw is locked, a guide portion on one of the cover body and the resin product, and a guide receiving portion for engaging the guide portion on the other of the cover body and the resin product. In the mounting structure for a body and a resin product, a part of the plurality of locking claws is elastically deformed in a predetermined direction to be engaged with the engagement receiving portion, and the other locking claws are the same as described above. This is achieved by a cover body mounting structure characterized in that the guide member is locked in a state where it is elastically deformed in a direction opposite to the elastic deformation direction and the guide portion engages with the guide receiving portion.

That is, some of the locking claws are provided so as to be elastically deformed in a predetermined direction, and when engaged, they are locked in the corresponding lock receiving portions of the resin product while bending in a predetermined direction. The other locking claws are provided so as to be elastically deformed in a direction opposite to the predetermined direction, and when engaged, bend in the direction opposite to the predetermined direction and engage with the corresponding lock receiving portion of the resin product. Be 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 are mutually different. The locking strength of the cover is secured by increasing the locking strength of the locking claw or at least acting in a direction in which it does not decrease. In particular, when two or more pairs of locking claws are used, if the locking claws located in the vicinity of each other are made to act so as to increase the locking strength with respect to each other, the lengthwise direction of the cover body, etc. Bending deformation can be minimized.

Further, more preferably, by making the engaging surface of the guide portion with respect to the guide receiving portion an inclined surface, for example, the guide receiving portion of the resin product strengthens the engagement with the locking claw of the cover body, Alternatively, since it acts to prevent the opening or notch or the like to which the cover body is attached from expanding or deforming, loosening or dropping of the cover body at the time of engagement of the cover body and rattling due to an increase in the gap are further prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be specifically described below with reference to typical examples shown in the accompanying drawings. FIG. 1 shows the appearance of a front bumper protector 10 to which the present invention is applied.

The front bumper protector main body 11 has a central portion 11a having characters or the like engraved on the surface thereof, a plate mounting portion 11b for fixing the license plate disposed below the central portion 11a, and horizontally from the left and right end portions toward the front. The left and right bulged end portions 11c and 11c that smoothly project, and the U-shaped notches 12 and 12 formed on the upper surfaces of the left and right end portions,
It has a screw insertion hole 11d for attaching the front bumper protector body 11 with a screw or the like to a mounting bracket formed on the left and right end faces and standing upright from a bumper (not shown),
It is formed symmetrically as a whole. Left and right notches 1
Reference numerals 2 and 12 denote masks 21 and 21 which are cover bodies of the present invention.
The masks 21 and 21 are attached to the front bumper protector main body 11 by screws (not shown), first to third locking claws 22a to 22c, and a pair of left and right guide pieces 23a and 23b, which will be described later, and the cutout portions are attached. 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, which is raised in an L shape. By attaching a mask (not shown) having a circular hole to this end opening, a guard bar (not shown) can be fitted and attached to the end opening. Further, when the guard bar is not attached, the mask 21 is fitted into the U-shaped notches 12 and 12 to close the end openings of the inner reinforcement so that the upper portions thereof are flush with each other to enhance the appearance.

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

Hereinafter, the front bumper protector 11
The right side will be described, but the left side also has a similar structure and is symmetrical. FIG. 3 is a sectional view showing a 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 so as to face the left and right edge portions on the front end side (front side in FIG. 2) of the mask 21, and the left and right mounting plate portions 13 and 14 are opposed to each other. Edge 1
It engages with 3a and 14a from the inside. In the illustrated example, the locking of the first and third locking claws 22a and 22c is performed even after the locking is finished, as shown in the figure, the edges of the left and right mounting plate portions 13 and 14 are A minute gap is formed between 13a and 14a.

Next, the procedure for attaching the entire mask 21 in this embodiment will be described. Width W of the rear end 21c of the mask 21
2 is formed to be slightly smaller than the width W1 of the open end of the cutout portion 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 so that the front end 21b forms the innermost portion of the notch 12 in the front end face 1
2a so as to come into contact with each other, gradually lower the rear end 21c, and engage each of the locking claws 22a to 22c and the guide pieces 23a, 2a.
3b is locked to each locking portion of the notch 12 and fixedly attached in a completely fitted state. The locking procedure is as follows:
First and third locking claws 22a, 2 provided at the front end of the
2c engages with the edges 13a and 14a of the left and right mounting plate portions 13 and 14 from the inside as described above (FIG. 4). At this time, the locking portions of the first and third locking claws 22a and 21c are provided with a minute gap D1 between the left and right mounting plate portions 13 and 14 and the end edges 12c and 12d. It passes and is located below.

Next, the first to third locking claws 22a to 22
Since the length of c is set to be longer than that of 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 tip locking portion is pressed by one side surface of the square hole 14b and passes through while elastically deforming, and at this time, as shown in FIG. 5, a gap D2 is formed between the outer peripheral edge of the mask 21 and the edge 12a of the cutout 12. Is formed. At the time of 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 by the reaction force of the elastic contact surface. When setting the shape of the same locking claw 22b, the sufficient locking force is generated by itself.

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

At this time, 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 arrow AA 'shown in FIG. By reducing the width W1 of the cutout 12 as a whole, the width W1 is formed between the end edges of the first to third locking claws 22a to 22c, the mounting plate portions 13 and 14, and the cutout 12. The gaps D1 and D2 are eliminated, and the locking claws 22a to 22c
Is reliably locked and a large locking strength is secured.
Further, when the width W1 of the cutout 12 is reduced, the mask 21 is moved by the downward movement of the second locking claw 22c.
The lower surface of the mask closely adheres to the upper surfaces of the mounting plate portions 13 and 14, eliminates the gaps D1 and D2, and tightly fits the mask 21 into the cutout portion 12, so that a strong and beautiful mounting is achieved.

As is apparent from the above description, the present invention is not limited to the front bumper protector, but a grill (a defroster grill or the like) attached to a cover body for closing the openings of other resin parts, an instrument panel, or the like. Of course, it can be applied to. In this case, it can also be applied in combination with conventional welding bosses, resin clips, screws, etc.
Further, the installation position of the guide piece does not have to be a position which is orthogonal to and opposes the opposing sides, and even when expansion in two directions intersecting with the opposing sides at a predetermined crossing angle occurs, it is possible to move in each of these directions. It can also be installed to prevent deformation of the.

[0020]

Since the present invention has the above-described structure, 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 have a predetermined shape. In addition to being elastically deformed in the direction, the other locking claws are elastically deformed in the direction opposite to the predetermined direction, so that these two types of locking claws mutually increase the locking strength of the other locking claws. Or, at least, it acts in a direction that does not decrease, and 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 in the vicinity of each other act to increase the mutual locking strength, and the cover body is deformed flexibly in the length direction. Can be minimized.

Further, according to the present invention, by providing a guide portion in addition to the above-mentioned structure, the guide receiving portion of the resin product further strengthens the engagement with the cover body, or the opening or notch for attaching the cover body is expanded. Since it acts to prevent opening and deformation, even if the cover body is engaged, it may come loose or fall off.
And it is possible to prevent an increase in the gap. Therefore, the shape and dimensions of the cover body and the locking claws can be formed in advance so that they can be locked easily, and it is possible to firmly and reduce the gaps by the engagement of the guide portions. Is improved.

[Brief description of 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 portion of the front bumper protector.

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

FIG. 4 is a cross-sectional view showing a state when the engagement of the front bumper protector body and the mask is started.

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]

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 piece

Claims (2)

[Claims] 1. A cover body having a plurality of locking claws on one of a cover body and a resin product, and an engagement receiving portion for locking the locking claws on the other side of the cover body and the resin product. And a resin product having a guide portion on one side of the resin product, and a guide receiving portion for engaging the guide portion on the other side of the resin body and the resin product. Some of the retaining pawls are engaged with the engagement receiving portion while elastically deforming in a predetermined direction, and the other locking pawls are engaged while elastically deforming in the direction opposite to the elastic deformation direction. A mounting structure for a cover body, wherein the guide portion is engaged with the guide receiving portion. 2. The mounting structure according to claim 2, wherein an engaging surface of the guide portion with respect to the guide receiving portion is an inclined surface.