JP5350007B2 - Assembly structure of resin parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely assemble two resin components even if they are found to have manufacturing errors therein while keeping assembled portions coupled even if forces in anti-assembling directions have been applied between both the resin components. <P>SOLUTION: In this assembling structure of the resin components, a first resin component 5 has a locking arm 5c protruding from the edge end surface 5d of the resin components body 5a. The locking arm 5c has a base end side locking claw 51 and a tip end side locking claw 53 which are protrusively provided, and a hinge 55 is formed between them. A second resin component 7 has an inner side locking protrusion 71 and an outside locking protrusion 73 while the tip end side locking claw 53 is engaged with the inner side locking protrusion 71 in a state that both the resin components are assembled to each other, and the base end side locking claw 51 and the outside locking protrusions 73 are made to face each other with a gap opened between them in the protruding direction of the locking arm 5c. When both the resin components are subjected to forces further greater than normal locking forces, the tip side of the locking arm 5c is deflected in a direction in which it moves away from the second resin component 7 with the hinge 55 as a fulcrum, and the base end side locking claw 51 and the outside locking protrusion 73 come in contact with each other. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an assembling structure of resin parts composed of at least two component molded articles, for example, with a resin cover or the like equipped in a vehicle.

Conventionally, in an assembly structure of resin parts, for example, Patent Document 1 discloses a structure in which a first resin part and a second resin part are assembled by an engaging claw. Inside the first resin component, a rectangular flange portion is provided so as to be substantially flush with the contact surface with the second resin component, and a substantially square opening is formed in the flange portion. . In the flange portion, an extension portion that is inclined so as to gradually narrow the width of the opening portion as the distance from the surface of the flange portion is formed on the side portion facing the inner surface of the first resin component. A flexible first engaging claw is provided at the tip of the part. Moreover, the 2nd engaging claw which protrudes toward the said 1st resin component side is formed in the inner surface of the 2nd resin component. The second engaging claw is inserted into the opening of the first resin component and engaged with the first engaging claw when the both resin components are assembled, whereby both the resin components are assembled. .
Japanese Patent No. 3698624 (paragraph 0045 column, FIG. 5)

  By the way, in Patent Document 1, if a manufacturing error has occurred in at least one of the first resin component and the second resin component, the first engagement claw and the first engagement claw when the first resin component and the second resin component are assembled. If the second engaging claw cannot be engaged, or the engagement becomes insufficient, and if a force acts on the second engaging claw in the anti-insertion direction, both parts may come off.

  The present invention has been made in view of such points, and the object of the present invention is to be able to reliably assemble two parts even if a manufacturing error has occurred in a resin part, and between the two parts. Another object of the present invention is to provide an assembly structure for resin parts in which the engagement portion does not come off even when a force in the direction of anti-assembly is applied.

In order to achieve the above object, in the first invention, an assembly structure for assembling the panel-shaped first resin component and the panel-shaped second resin component by an assembly operation in a direction along the panel surface, The first resin component includes a resin component main body and a locking arm that protrudes from one end edge of the resin component main body toward the second resin component side along the panel surface. and a base end side locking claw part and the tip-side locking claw part spaced locking arm projecting direction and facing towards the front side of the resin component body is protruded Rutotomoni, the base end side locking A hinge portion is formed between the claw portion and the front end side locking claw portion, while the second resin component is provided with a resin component main body, and an inner side locking is provided on the back surface on one end side of the resin component main body. The protruding portion protrudes so as to correspond to the opposite side of the first resin part of the front end side locking claw portion. In addition, the outer locking projection is protruded so as to correspond to the opposite side of the first resin part of the base side locking claw, and the set of the first resin part and the second resin part. In the attached state, the distal end side locking claw and the inner side locking projection are engaged, and the proximal side locking claw and the outer side locking projection are in the protruding direction of the locking arm. When the force in the anti-assembly direction acts on at least one of the first resin component and the second resin component, the tip end side locking claw portion and the inner locking protrusion And the distal end portion of the locking arm is bent in a direction away from the back surface of the second resin part with the hinge portion as a fulcrum, and the proximal end side locking claw portion and the first resin component and the second by the above outer locking protrusion is engaged in close proximity to each other Characterized in that it is configured to maintain the assembled state of the resin component.

According to a second invention, in the first invention, a concave groove portion extends across the width direction of the locking arm between the distal end side locking claw portion and the proximal end side locking claw portion of the locking arm. is formed, the hinge unit is characterized by being composed of a thin portion corresponding to the groove portion.

According to 1st invention, the front end side latching claw part of a 1st resin component and the inner side latching projection part of a 2nd resin component engage, and a 1st resin component and a 2nd resin component are assembled | attached. In addition, even if a manufacturing error occurs in both resin parts and the front-end side locking claw and inner locking projection cannot be engaged or the engagement is insufficient, the proximal-side locking By setting the gap formed between the claw part and the outer locking projection part to be more than the manufacturing error in advance, even if a force in the anti-assembly direction acts between both resin parts, the base end side The locking claw and the outer locking projection are securely engaged, and the first resin component and the second resin component are securely assembled. Further, in the normal engagement state of the first resin component and the second resin component, the counter-assembly direction larger than the engagement force (pressure contact force) acting between the front end side locking claw portion and the inner side locking projection portion. When the force acts between the two resin parts, the pressure contact force between the inner locking projection and the distal end side locking claw increases, and only the distal end portion of the locking arm uses the hinge portion as a fulcrum to support the second resin. Bends away from the part. Accordingly, since the base end side portion of the locking arm does not bend in the direction away from the second resin component, the engagement between the base end side locking claw portion and the outer locking projection portion is ensured, and both resin components Can be secured (maintained) .

According to the second invention, since the hinge portion can be formed simultaneously with the molding of the first resin component, the manufacturing cost can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the following description of preferable embodiment is only an illustration essentially, and does not intend restrict | limiting this invention, its applicable resin component, or its use.

  FIG. 1 is a perspective view of a room mirror 1 provided in a room of a right-hand drive vehicle as viewed from the driver's seat side. The room mirror 1 is bonded to the upper indoor side of a windshield (not shown) in front of the vehicle by a base 1b of a stay 1a connected to the room mirror 1. The base end portion peripheral portion of the base 1 b is covered with a resin cover 3.

  As shown in FIG. 2, the resin cover 3 is a substantially rectangular panel-shaped resin component made of, for example, polypropylene, and the first resin component 5 located on the right side in the vehicle width direction and the second resin component located on the left side in the vehicle width direction. It consists of resin parts 7. The first resin component 5 has a substantially flat panel surface portion 5e extending in the vehicle front-rear direction, and has a halved shape in which three sides of the four periphery of the panel surface portion 5e are surrounded by side walls 5f, 5g, and 5h. Yes. The resin component main body 5a of the present invention includes a panel surface portion 5e and side walls 5f, 5g, and 5h. As the vehicle heads forward, the side wall 5g approaches the left side in the vehicle width direction and the width of the panel surface portion 5e becomes narrower. Yes. The second resin component 7 has a substantially flat panel surface portion 7e extending in the vehicle front-rear direction, and has a halved shape in which three sides of the four periphery of the panel surface portion 7e are surrounded by side walls 7f, 7g, 7h. Yes. The resin component main body 7a of the present invention is composed of a panel surface portion 7e and side walls 7f, 7g, 7h, and the width of the panel surface portion 7e becomes narrower as the side wall 7g approaches the right side in the vehicle width direction toward the front of the vehicle. .

  A first component-side end surface 5d is formed on an end surface of the resin component body 5a facing the second resin component 7, while an end surface of the resin component body 7a facing the first resin component 5 is A second component side end face 7d is formed. That is, the first component side end surface 5d and the second component side end surface 7d face each other. The first resin component 5 and the second resin component 7 are assembled by bringing the first component-side end surface 5d and the second component-side end surface 7d into contact with each other so that the outer surfaces thereof are flush with each other. ing.

  A first recess 57a that is recessed to the right in the vehicle width direction is formed at the vehicle longitudinal direction center of the left edge of the resin component body 5a in the vehicle width direction. A substantially rectangular first fitting portion 59 having an opening 59a is formed on the left side in the vehicle width direction. On the other hand, as shown in FIG. 4, a second recessed portion 77a that is recessed leftward in the vehicle width direction is formed at the vehicle longitudinal direction center of the resin component main body 7a on the right edge in the vehicle width direction so as to correspond to the first recessed portion 57a. A substantially rectangular second fitting portion 79 having an opening 79a on the right side in the vehicle width direction is formed at the periphery of the center of the second recess 77a in the vehicle longitudinal direction. When the first resin component 5 and the second resin component 7 are assembled, the first recess 57a and the second recess 77a form the through hole 3a of the resin cover 3, and the opening of the first fitting portion 59 is formed. By fitting a projection (not shown) formed on the base 1b into the opening 79a of 59a and the second fitting portion 79, the base end portion of the base 1b is accommodated in the through hole 3a. In this state, the resin cover 3 can be attached to the base 1b.

  As shown in FIGS. 3 and 4, the resin component main body 5 a protrudes along the panel surface portion 5 e from the back side of the resin component main body 5 a at the left end edge in the vehicle width direction and extends along the left end edge in the vehicle width direction. A polymerization protrusion 57 is formed. The overlapping protrusion 57 is integrally provided with a plate-like locking arm 5c protruding from the overlapping protrusion 57 to the left in the vehicle width direction along the panel surface portion 5e of the resin component main body 5a. Two stop arms 5c are provided in front of the vehicle relative to the first recess 57a, and one stop arm 5c is provided in the rear of the vehicle relative to the first recess 57a.

As shown in an enlarged view in FIG. 5, the distal end portion of the locking arm 5c is formed so as to gradually move away from the back surface of the resin component main body 5a as the distal end side guide portion 53a goes to the distal end side. Near the proximal end of the locking arm 5c of the distal guide portion 53a, the distal locking claw 53 is integrally formed toward the surface side of the resin component main body 5a over the entire width direction of the locking arm 5c. Projected. Then, on the proximal end side of the distal end side locking claw portion 53, the proximal end side locking claw portion 51 extends over the entire width direction of the locking arm 5c, and the distal end side locking claw portion 53 and the locking arm 5c. Are protruded integrally toward the surface side of the resin component main body 5a so as to be spaced apart from each other in the protruding direction. On the back side of the locking arm 5c between the proximal end side locking claw portion 51 and the distal end side locking claw portion 53, a V-shaped concave groove portion 55a is formed over the entire width direction of the locking arm 5c. The hinge portion 55 is composed of a thin portion corresponding to the concave groove portion 55a in the locking arm 5c. Thus, since the hinge part 55 can be shape | molded simultaneously with shaping | molding of the 1st resin component 5, manufacturing cost can be reduced.

  An engagement surface (inclined surface) 53b formed on the proximal end side in the protruding direction of the locking arm 5c in the distal end side locking claw 53 is formed so as to move toward the proximal end side in the protruding direction of the locking arm 5c. Inclined so that the plate thickness gradually decreases.

  Moreover, the opposing surface 51b formed in the locking arm 5c protrusion direction base end side in the said base end side locking claw part 51 is formed substantially orthogonally to the protrusion direction of the said locking arm 5c. On the other hand, the proximal end guide surface 51a formed on the distal end side in the protruding direction of the locking arm 5c in the proximal end side locking claw 51 is a plate of the locking arm 5c as it goes to the distal end side in the protruding direction of the locking arm 5c. Inclined so that the thickness gradually decreases.

  A reinforcing rib 5b that extends from the right end in the vehicle width direction of the locking arm 5c and the first fitting portion 59 to the right side in the vehicle width is integrally provided on the back side of the resin component body 5a.

  On the other hand, as shown in FIG. 4 and FIG. 5A, an outer locking projection 73 projects integrally along the right edge in the vehicle width direction near the right edge in the vehicle width direction of the resin component body 7a. Has been. Further, on the inner side (left side in the vehicle width direction) of the outer locking projection 73, an inner locking projection 71 is integrally projected in parallel with the outer locking projection 73. When the first resin component 5 and the second resin component 7 are assembled, the outer locking projection 73 is on the side opposite to the first resin component 5 in the proximal end side locking claw portion 51 (first resin component). 5 and a position corresponding to the opposite side of the first resin component 5 of the first resin component 5. Projected to In FIG. 4, B indicates the assembly direction of the second resin component 7.

  As shown in FIG. 5A, the opposing surface 73a formed on the inner locking projection 71 side of the outer locking projection 73 is in the direction along the panel surface 7e of the resin component body 7a, that is, the second resin. The component 7 is formed so as to be substantially orthogonal to the assembly direction B of the component 7, and is opposed to the facing surface 51 b of the proximal end side locking claw portion 51.

  Further, as shown in FIGS. 3 to 5, a plate-like protruding portion that protrudes to the right in the vehicle width direction along the panel surface portion 7 e of the resin component main body 7 a at the right edge in the vehicle width direction of the second resin component 7. 75 is integrally formed, and the four protrusions 75 are provided in front of the second recess 77a and two in the rear of the vehicle from the second recess 77a. As shown in FIG. 6, the tip portion of the projecting portion 75 is inclined so as to gradually move away from the back surface side of the resin component main body 7a as the guide surface 75a goes to the tip side. A recess 7c is formed between the protrusion 75 and the resin component main body 7a. The recess 7c opens to the right in the vehicle width direction and is recessed to the left in the vehicle width direction.

  On the back side of the resin component main body 7a, a reinforcing rib 7b extending from the left end in the vehicle width direction of the protruding portion 75 and the second fitting portion 79 to the left in the vehicle width direction is integrally projected. The both ends of the inner locking projection 71 and the outer locking projection 73 located in the vehicle front-rear direction located between the reinforcing ribs 7b on the protruding portion 75 side are formed integrally with the side surface of the reinforcing rib 7b. Further, the vehicle width in the resin component main body 7a is provided between the reinforcing ribs 7b in which the inner locking projections 71 and the outer locking projections 73 are not formed on the protruding portion 75 side in front of the second recess 77a. An outer reinforcing rib 7i is integrally provided in the vehicle front-rear direction near the right edge of the direction. Further, on the inner side (left side in the vehicle width direction) of the outer reinforcing rib 7i, an inner reinforcing rib 7j is integrally projected in parallel with the outer reinforcing rib 7i.

  Next, a method for assembling the resin cover 3 will be described. First, the case where the first resin component 5 is assembled to the second resin component 7 by moving in the assembly direction A will be described. As shown in FIG. 4, both resin parts are arranged so that the first part side end face 5 d of the first resin part 5 and the second part side end face 7 d of the second resin part 7 face each other. Next, when the first resin component 5 is moved in the direction along the panel surface portions 5 e and 7 e, that is, in the assembling direction A, the leading end side guide portion 53 a of the locking arm 5 c becomes the leading end corner portion 73 b of the outer locking projection portion 73. Slidably contact with the hinge portion 55 of the locking arm 5c so that only the distal end portion thereof bends away from the second resin component 7, and the distal end side locking claw portion 53 climbs over the outer locking projection 73 to engage the inner side. It moves between the stop projection 71 and the outer locking projection 73. When the first resin component 5 is further moved in the assembly direction A, the overlapping projection 57 moves while sliding on the guide surface 75a of the projection 75, and the panel surface portion 5e of the first resin component 5 is moved to the second resin component 7. The panel surface portion 7e is guided at the same level as the panel surface portion 7e, that is, both the panel surfaces 5e and 7e are flush with each other. At substantially the same time, the distal end side guide portion 53a of the engagement arm 5c is in sliding contact with the distal end corner portion 71b of the inner engagement projection 71, and the proximal end guide surface 51a of the proximal end engagement claw portion 51 is engaged with the outer engagement. By slidingly contacting the distal end corner portion 73b of the protrusion 73, the entire locking arm 5c bends away from the second resin component 7 with the proximal end portion of the locking arm 5c as a fulcrum, and the distal end side locking claw 53 Gets over the inner locking projection 71 and, at the same time, the proximal locking claw 51 gets over the outer locking projection 73. When the first resin component 5 is further moved in the assembly direction A, as shown in FIG. 5A, the engagement surface (inclined surface) 53b of the front end side locking claw portion 53 and the inner locking projection portion. The front end corner 71c of 71 is engaged, and the first component side end surface 5d at the left end in the vehicle width direction of the first resin component 5 and the second component side end surface 7d at the right end in the vehicle width direction of the second resin component 7 are connected. Simultaneously with the contact, the overlapping protrusion 57 formed on the resin component body 5 a is fitted into the recess 7 c of the resin component body 7 a in the second resin component 7. At this time, the opposing surface 73a of the outer locking projection 73 in the second resin component 7 is separated from the opposing surface 51b of the proximal-side locking claw 51 of the locking arm 5c in the protruding direction of the locking arm 5c. doing.

  Thereby, while the movement of the assembly direction A of the 1st resin component 5 is controlled, the movement of the assembly direction B of the 2nd resin component 7 can be controlled.

  Further, the engaging surface 53b of the front end side locking claw 53 in the locking arm 5c and the inner locking projection 71 of the second resin component 7 are in pressure contact with each other by the restoring force of the locking arm 5c. 5 and the movement of the second resin component 7 in the respective anti-assembly directions A and B can be restricted. That is, the first component side end surface 5d and the second component side end surface 7d are pressed by the above-described pressure contact.

  Moreover, since the superposition | polymerization protrusion part 57 of the 1st resin component 5 fits into the recessed part 7c of the 2nd resin component 7, the movement of the thickness direction of the 1st resin component 5 and the 2nd resin component 7 can be controlled. . Therefore, the 1st resin component 5 and the 2nd resin component 7 can be assembled | attached reliably.

  Further, for example, a corner 53d formed by the tip of the front end side locking claw 53 in the protruding direction (plate thickness direction) and intersecting the engaging surface 53b is a front end surface of the inner side locking projection 71. When a manufacturing error that abuts against 71d occurs in the first resin component 5 and / or the second resin component 7, that is, the first resin component 5 and the second resin component 7 are molded and assembled within the manufacturing error range. When a manufacturing error occurs such that the inner locking projection 71 of the second resin component 7 is located further to the left in the vehicle width direction than the position shown in FIG. Only the distal end side portion of the locking arm 5c is bent in the direction away from the second resin component 7. For this reason, a gap formed between the opposing surface 51b of the base end side locking claw portion 51 and the opposing surface 73a of the outer side locking projection portion 73 is separated from the opposing surface 51b of the base end side locking claw portion 51 and the outside. Each anti-assembly direction of the first resin component 5 and / or the second resin component 7 is set by molding in advance so as to be more than a manufacturing error so that the opposing surface 73a of the locking projection 73 faces (opposes). Even if a force is applied to A and B, the opposing surfaces 51b and 73a are in pressure contact with each other, and the first resin component 5 and the second resin component 7 are not detached and the two resin components 5 and 7 are securely connected. Can be assembled.

On the other hand, as shown in FIG. 5 (b), normal engagement of the front end side locking claw 53 and the inner locking projection 71 in at least one of the first resin component 5 and the second resin component 7. When an acting force in the counter assembling direction A or B larger than the resultant force is applied, the engaging surface 53b and the tip corner portion 71c of the inner locking projection 71 are brought into sliding contact with each other, whereby the locking arm Only the tip side portion of the hinge portion 55 of 5c is bent in the X direction so as to be separated from the second resin component 7. At this time, since the hinge portion 55 is formed, the proximal end portion of the hinge portion 55 is not bent in the X direction. Therefore, even if the acting force in the large anti-assembly direction A or B is applied, the facing surface 51b of the proximal end side locking claw 51 and the facing surface 73a of the outer locking projection 73 are brought into contact with each other by the acting force. That is, since the base end side locking claw portion 51 and the outer side locking projection portion 73 are engaged with each other, both the resin components 5, 7 are not detached from the assembly of the first resin component 5 and the second resin component 7. Can be secured (maintained) .

  In the present embodiment, the case where the first resin component 5 is assembled to the second resin component 7 by moving in the assembly direction A has been described. However, the second resin component 7 is assembled to the first resin component 5. The same effect as described above can be obtained also in the case of moving in the direction B, and the first resin component 5 is moved in the assembly direction A and the second resin component 7 is moved in the assembly direction B and assembled. Even in the case, the same effect as described above can be obtained.

  In the present embodiment, the front end side locking claw portion 53 is provided with the engaging surface 53b that is inclined, and the front end corner portion 71c is provided at the front end of the inner side locking projection 71. You may form in the inclined surface substantially parallel to the mating surface 53b. In this case, the engaging surface 53b of the distal end side locking claw 53 is not inclined but is formed at a substantially right-angled corner that contacts (presses) the inclined surface formed on the inner locking protrusion 71. It may be formed.

  In the present embodiment, an example in which the resin part is applied to a resin cover for a vehicle rearview mirror has been described. However, the present invention is not limited to this, and the present invention can also be applied to a television camera or the like attached in a vehicle.

  The present invention is suitable, for example, for an assembly structure when assembling at least two component molded articles with a resin cover or the like installed in a vehicle.

It is a perspective view which shows the attachment state of the room mirror which applied the resin component of this invention to the resin cover of the room mirror adhere | attached on the windshield upper room interior side of a motor vehicle. It is the perspective view which looked at the resin cover of FIG. 1 from the surface side. It is the perspective view which looked at the resin cover of FIG. 2 from the back surface side. FIG. 4 is an exploded perspective view of the resin cover of FIG. 3 before assembling the first resin part and the second resin part, as seen from the back side. FIG. 5A is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5A shows a normal state when the first resin part and the second resin part are assembled, and FIG. FIG. 5 is a view showing a state when a force in the counter-assembly direction that is larger than the engaging force acting between the front end side locking claw portion and the inner side locking projection portion is applied to both resin parts in the assembled state of FIG. is there. It is sectional drawing in the BB line of FIG.

DESCRIPTION OF SYMBOLS 1 Room mirror 3 Resin cover 5 1st resin component 5a Resin component main body 5c Locking arm 51 Base end side latching claw part 51b Opposing surface 53 Tip side latching claw part 53b Engagement surface (inclined surface)
55 Hinge portion 55a Concave groove portion 7 Second resin component 7a Resin component main body 7c Concavity 71 Inner locking projection 73 Outer locking projection 73a Opposing surface

Claims (2)

An assembly structure for assembling the panel-shaped first resin component (5) and the panel-shaped second resin component (7) by an assembly operation in a direction along the panel surface,
The first resin component (5) includes a resin component main body (5a) and a protrusion protruding from one end edge of the resin component main body (5a) toward the second resin component (7) along the panel surface. A stop arm (5c) ,
The locking arm (5c) includes a base end side locking claw portion (51) and a distal end side locking claw portion (53) which are spaced apart from each other in the protruding direction of the locking arm (5c) and face each other. projecting toward the front side of the component body (5a) Rutotomoni, hinge (55) is formed between the base end side locking claw part (51) the leading end side locking claw part (53) And
On the other hand, the second resin component (7) includes a resin component main body (7a) , and an inner locking protrusion (71) is provided on the rear surface on one end edge side of the resin component main body (7a). Projecting so as to correspond to the opposite side of the first resin part (5 ) of the part (53) , and the outer locking projection (73) of the base end side locking claw (51) . Projecting so as to correspond to the opposite side of the first resin component (5) ,
In the assembled state of the first resin part (5) and the second resin part (7) , the front end side locking claw part (53) and the inner side locking projection part (71) are engaged. The base end side locking claw part (51) and the outer side locking projection part (73) are opposed to each other in the protruding direction of the locking arm (5c) , and the first resin component (5) and When a force in the anti-assembly direction acts on at least one of the second resin parts (7) , the front end side locking claw part (53) and the inner side locking projection part (71) with bent away from the rear surface of the locking arm the hinge portion (55) the second resin component (7) as a fulcrum distal portion than is the hinge portion (55) of (5c) in pressure contact with each other, the base end side locking claw part (51) and the outer locking projections (73) and that is engaged close to each other The first resin component (5) and the assembly structure of the resin component, characterized in that it is configured to maintain the assembled state of the second resin component (7). In the assembly structure of the resin component according to claim 1,
Between the front end side claw portion (53) and the proximal end side claw portion (51) of the locking arm (5c), a concave groove portion (55a) is formed in the width direction of the locking arm (5c). Formed over
The said hinge part (55) is comprised by the thin part corresponding to the said recessed groove part (55a), The assembly structure of the resin component characterized by the above-mentioned .

Images