阅读说明：本技术 树脂成型品 (Resin molded article ) 是由 篠原健太 于 2019-04-11 设计创作，主要内容包括：本发明提供一种树脂成型品,树脂成型品具有从基材的背面突出并安装有安装部件的安装部。安装部具有：两个侧壁部,它们从背面立起且彼此对置；连接部,其连接这些侧壁部的末端；以及安装底座部,其覆盖这些侧壁部和连接部,并固定安装部件。在阶梯部、第2侧壁部以及连接部与基材之间形成有空隙。(The invention provides a resin molded product, which is provided with a mounting part protruding from the back surface of a base material and provided with a mounting component. The mounting part has: two side wall portions standing from the back surface and facing each other; a connecting portion connecting ends of the side wall portions; and a mounting base portion that covers the side wall portions and the connecting portion and fixes the mounting member. Gaps are formed between the step portion, the 2 nd side wall portion, and the connecting portion and the base material.)

1. A resin molded article characterized in that,

the resin molded product is integrally formed with a base material having an external appearance surface which can be visually recognized from the outside, and an attachment portion which protrudes from the back surface of the base material and to which a mounting member is attached,

The installation department is a face open-ended case shape to have:

Two side wall portions that face each other;

A connecting portion that connects distal ends of the side wall portions;

A mounting base portion that covers these side wall portions and the connecting portion and can fix the mounting member; and

An opening portion surrounded by the side wall portion and the mounting base portion,

At least one of the two side wall portions has:

a 1 st side wall portion rising from the rear surface at a position adjacent to the opening portion;

A step portion extending from an end of the 1 st side wall portion toward an opposite side wall portion; and

a 2 nd side wall part extending in a direction away from the 1 st side wall part from an end of the step part as a starting point,

Gaps are formed between the connecting portion, the step portion, and the 2 nd side wall portion and the base material.

2. The resin molded article according to claim 1,

The mounting portion further has a connecting portion connecting the connecting portion and the base material,

the outer surface of the connecting portion is continuous with the outer surface of the connecting portion,

the wall thickness of the connecting portion is thinner than that of the connecting portion.

3. The resin molded article according to claim 1,

The mounting portion further has a 2 nd side wall portion coupling portion for coupling the 2 nd side wall portion and the base material,

An outer surface of the 2 nd side wall part coupling portion is continuous with an outer surface of the 2 nd side wall part,

The wall thickness of the 2 nd side wall portion coupling portion is thinner than the wall thickness of the 2 nd side wall portion.

4. the resin molded article according to claim 1,

the mounting portion further has a step portion coupling portion that couples the step portion and the base material,

an outer surface of the stepped portion coupling portion is continuous with an outer surface of the stepped portion,

The wall thickness of the step portion connecting portion is thinner than the wall thickness of the step portion.

5. the resin molded article according to claim 1,

the step portion is formed substantially parallel to the connection portion.

6. The resin molded article according to claim 1,

The length of the 1 st side wall part is shorter than the length of the 2 nd side wall part.

Technical Field

The present invention relates to a technique for producing a resin molded article having an appearance surface visually recognizable from the outside.

background

For example, resin molded articles are used as exterior materials of vehicles. The resin molded article is a design part produced by resin molding such as injection molding. When a portion including the design surface is used as a base material, a mounting portion for mounting a mounting component is formed on the back surface of the base material. The resin molded article can be mounted on the vehicle body by mounting the mounting member on the mounting portion and inserting the mounting member into the vehicle body. The prior art relating to such resin molded articles is disclosed in Japanese patent laid-open No. 2003-063321.

As shown in japanese laid-open patent publication No. 2003-063321, a resin molded article has a mounting portion which projects from the back surface of a base material and to which a mounting member for mounting to a vehicle body is mounted. The base material and the mounting portion are integrally formed by injection molding. That is, the resin molded article is manufactured by filling a molten resin into a mold and cooling the resin.

The mounting portion has a box shape with an opening on one surface. By forming the mounting portion in such a shape, high mounting rigidity can be ensured.

In the resin molded article shown in japanese unexamined patent publication No. 2003-063321, the side wall of the mounting portion formed in a box shape rises from the base material. When the resin is cooled and shrunk at the boundary between the side wall and the base material, a phenomenon called shrinkage in which the appearance surface is depressed along the end of the side wall may occur. Not only the exterior material of the vehicle, but also the appearance surface shrinks, which degrades the aesthetic appearance of the resin molded article.

disclosure of Invention

The invention provides a resin molded product capable of ensuring high aesthetic property.

according to the present invention, there is provided a resin molded article characterized in that a base material having an appearance surface visually recognizable from the outside and a mounting portion protruding from the back surface of the base material and mounted with a mounting member are integrally formed,

The installation department is one side open-ended case shape to have: two side wall portions that face each other; a connecting portion connecting ends of the side wall portions; a mounting base portion that covers these side wall portions and the connecting portion and can fix the mounting member; and an opening portion surrounded by the side wall portion and the mounting base portion,

At least one of the two side wall portions has: a 1 st side wall portion rising from the rear surface at a position adjacent to the opening portion; a step portion extending from an end of the 1 st side wall portion toward an opposite side wall portion; and a 2 nd side wall portion extending in a direction away from the 1 st side wall portion with an end of the step portion as a starting point,

gaps are formed between the connection portion, the step portion, and the 2 nd side wall portion and the base material.

in the present invention, the 1 st side wall portion rises from the back surface of the base material, and a gap is formed between the step portion, the 2 nd side wall portion, and the connecting portion and the base material. The 1 st side wall part adjacent to the opening part is erected from the back surface. This ensures the mounting rigidity of the portion adjacent to the opening. On the other hand, a gap is formed between the connection portion, the step portion, and the 2 nd side wall portion and the base material. By reducing the area where shrinkage is likely to occur, a resin molded article capable of ensuring high aesthetic quality can be provided.

The side wall portion is formed in a flat plate shape, and only a portion near the opening portion is formed continuously with the base material. At this time, if the slide mold is slid from the portion serving as the opening, the mold cannot be separated from the side wall. I.e., become barbs (undercuts). In order to release the mold, a plurality of slide molds are required. In the present invention, a step portion and a 2 nd side wall portion are provided. Thus, the gap can be formed between the connection portion, the step portion, and the 2 nd side wall portion and the base material by one slide mold while continuously raising the 1 st side wall portion and the rear surface. Since the resin molded article can be produced using a small number of slide molds, the production cost of the resin molded article can be reduced.

Drawings

Fig. 1 is a perspective view of a vehicle on which a resin molded article of embodiment 1 is mounted.

Fig. 2 is a perspective view of the resin molded article shown in fig. 1.

fig. 3 is a sectional view taken along line 3-3 of fig. 1.

Fig. 4 is an enlarged view of a portion 4 of fig. 3.

Fig. 5 is a 5-way view of fig. 4.

fig. 6 is a view from the 6-way of fig. 4.

Fig. 7 is a view illustrating a master mold used for manufacturing the resin molded article shown in fig. 1.

Fig. 8 is a view illustrating a slide mold provided to be slidable with respect to the main mold shown in fig. 7.

Fig. 9 is a diagram illustrating a cavity forming process.

Fig. 10 is a diagram illustrating a resin filling process.

Fig. 11 is a perspective view of a mounting portion of a resin molded article of example 2.

Fig. 12A is a perspective view of the resin molded article of example 3 as viewed from below.

Fig. 12B is a perspective view of the resin molded article shown in fig. 12A as viewed from above.

Fig. 13 is a view illustrating a mounting portion of a resin molded article of example 4.

Fig. 14 is a view illustrating a mounting portion of a resin molded article of example 5.

description of the reference symbols

10. 10A, 10B, 10C, 10D: a resin molded article;

11: a substrate;

11 a: appearance surface;

11 b: a back side;

20. 20A, 20B, 20C, 20D: an installation part;

21. 21B: a 1 st side wall portion;

22: a step portion;

23: a 2 nd side wall portion;

24: a connecting portion;

25: a sidewall portion;

26. 26A: a connecting portion;

26C: a 2 nd side wall portion connecting portion;

26D: a step portion connecting portion;

27: mounting a base part;

28: an opening part;

and (4) Bo: a vehicle body (mounted member);

Cl: a jig (mounting member);

Sp: a void.

Detailed Description

hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description, the left and right refer to the left and right with reference to the occupant of the vehicle to which the resin molded article is attached, and the front and rear refer to the front and rear with reference to the traveling direction of the vehicle. In the figure, Fr denotes the front, Rr the rear, Le the left as viewed from the occupant, Ri the right as viewed from the occupant, Up the upper, and Dn the lower.

< example 1>

refer to fig. 1. For example, the resin molded article 10 is provided at the rear of the vehicle Ve. The resin molded article 10 is a resin design member that can be visually confirmed from the outside of the vehicle Ve.

Refer to fig. 2 and 3. Fig. 2 shows the resin molded article 10 in a state viewed from the front. Therefore, the left-right direction is opposite to fig. 1.

The resin molded product 10 is integrally formed of a base material 11 and a mounting portion 20, wherein the base material 11 has an external appearance surface 11a which can be visually recognized from the outside, and the mounting portion 20 protrudes from a back surface 11b of the base material 11. A plurality of mounting portions 20 are formed on the back surface 11b of the base material 11. Here, the back surface 11b of the substrate 11 is a back surface of the design surface 11 a.

hereinafter, the mounting portion 20 formed at the center will be described in detail. The other mounting portions 20 are omitted from description, and the same structure as the centrally formed mounting portion 20 may be employed. In addition, the direction in which each mounting portion 20 opens may be appropriately selected.

Refer to fig. 3. The resin molded article 10 is mounted on a vehicle body Bo (mounted member Bo) via a jig C1 (mounting member C1) mounted on the mounting portion 20. The mounting portion 20 may be a portion to which a clip Cl is attached, the clip C1 being used for mounting to the vehicle body Bo.

Refer to fig. 4 and 5. The mounting portion 20 has a box shape with one surface opened. The mounting portion 20 has: two side wall portions 25, 25 which are opposed to each other; a connecting portion 24 connecting the ends of the side wall portions 25, 25; connecting portion connecting portions 26, 26 for connecting the connecting portion 24 to the back surface 11b of the base material 11; a mounting base portion 27 that covers the side wall portions 25 and the connecting portion 24 and that can fix the jig Cl (see fig. 2); and an opening 28 as an opening surrounded by the side wall portion 25 and the mounting base portion 27.

refer to fig. 5 and 6. The side wall portions 25, 25 have: 1 st side wall portions 21, 21 rising from the back surface 11b of the base material 11 at positions adjacent to the opening 28; step portions 22, 22 extending from the end portions of the 1 st side wall portions 21, 21 toward the opposite side wall portions 25, 25; and 2 nd side wall portions 23, 23 extending in a direction away from the 1 st side wall portions 21, 21 with the distal ends of the step portions 22, 22 as starting points.

The two 1 st-side wall portions 21, 21 face each other. At least one of the side wall portions 25 may have the 1 st side wall portion 21, the step portion 22, and the 2 nd side wall portion 23. For example, when the mounting portion 20 is formed at an end portion of the base material 11, shrinkage may not occur in the appearance surface. In such a case, the shape of the side wall portion 25 formed at a portion where shrinkage is unlikely to occur may be selected to be any shape.

Refer to fig. 5. The 1 st side wall parts 21, 21 have: first side wall body portions 21a, 21a connected to the step portions 22, 22; and 1 st side wall part connecting parts 21b, 21b connecting the lower parts of the 1 st side wall part main bodies 21a, 21a to the back surface 11b of the base material 11. The thickness of the 1 st side wall connecting portions 21b, 21b is smaller than the thickness of the 1 st side wall main bodies 21a, 21 a. The outer surfaces of the 1 st side wall body portions 21a, 21a and the outer surfaces of the 1 st side wall coupling portions 21b, 21b are continuous and flush with each other.

the direction perpendicular to the thickness direction of the 1 st side wall body portion 21a is defined as the longitudinal direction. The 1 st side wall portion coupling portions 21b, 21b are formed throughout the lower portions of the 1 st side wall portion main bodies 21a, 21a with respect to the longitudinal direction.

The 1 st side wall connecting portions 21b, 21b may be formed in a part of the lower portions of the 1 st side wall main bodies 21a, 21a with respect to the longitudinal direction. When the end portion of the 1 st side wall body portions 21a and 21a connected to the step portion 22 is one end and the opposite end portion is the other end, the 1 st side wall connecting portions 21b and 21b are preferably formed in a part of the lower portion including at least the one end.

Refer to fig. 6. The length L2 of the 1 st side wall portion 21, 21 is less than half the length L1 of the side wall portion 25. Namely, L1 > L2X 2. In other words, the length L2 of the 1 st side wall part 21 is shorter than the length L3 of the 2 nd side wall part 23.

The step portions 22, 22 extend from the end portions of the 1 st side wall portions 21, 21 in the direction approaching each other. The step portions 22, 22 are formed substantially perpendicular to the 1 st side wall portions 21, 21 and substantially parallel to the connection portion 24.

The 2 nd side wall portions 23, 23 are formed substantially perpendicular to the step portions 22, 22 and the connecting portion 24. The 2 nd side wall parts 23, 23 extend in the same direction as the 1 st side wall parts 21, 21.

Refer to fig. 3. The connecting portion 24 connects the 2 nd side wall portions 23, 23 formed to face each other. The connection portion 24 has: a 1 st link portion 24a formed continuously with the mount base portion 27 and extending toward the back surface 11b of the base material 11; a 2 nd connecting portion 24b formed at a position distant from the opening 28 with respect to the 1 st connecting portion 24 a; and a 3 rd connection part 24c connecting these 1 st and 2 nd connection parts 24a and 24 b. These 1 st to third connecting portions 24a to 24c extend in different directions from each other.

The connection portion 26 is formed continuously with the 2 nd connection portion 24b, and is formed to the base material 11. The upper surface (outer surface) of the connecting portion coupling portion 26 is continuous with the upper surface (outer surface) of the 2 nd connecting portion 24 b. The thickness W1 of the coupling portion 26 is thinner than the thickness W2 of the coupling portion 24.

the direction perpendicular to the thickness direction of the connection portion 24 is defined as the longitudinal direction. The coupling portion 26 is formed in a part of a lower portion of the coupling portion 24 with reference to a longitudinal direction of the coupling portion 24.

Refer to fig. 6. The mounting base portion 27 is formed in a substantially U-shaped wall-cut shape facing upward, and has a mounting member fitting portion 27a into which a clip C1 (see fig. 3) is fitted. The clip Cl is slidably fitted into the mounting member fitting portion 27 a.

Refer to fig. 3 and 5. A gap Sp is formed between the step portion 22, the 2 nd side wall portion 23, and the connection portion 24, and the rear surface 11b of the substrate 11. The gaps Sp are formed between the step portion 22, the 2 nd side wall portion 23, and the connection portion 24, and the rear surface 11b of the substrate 11, respectively.

The resin molded article 10 described above is manufactured by, for example, injection molding. A mold used for molding will be described.

Refer to fig. 7 and 8. The resin molded article manufacturing mold Mo is used for manufacturing the resin molded article 10 (see fig. 2), and the slide mold 60 is provided to be slidable with respect to the main mold 40.

refer to fig. 7. The main mold 40 is one of a fixed mold and a movable mold, and can form a cavity by being engaged with the other mold. When the main mold 40 is a movable mold, the main mold 40 is provided so as to be movable in the forward and backward directions of the substrate 11 (see fig. 3). A mounting portion corresponding portion 41 having a shape corresponding to the outer periphery of the mounting portion 20 (see fig. 3) is formed in the main mold 40 in a concave shape.

Reference is also made to fig. 8. The slide mold 60 has a substantially box shape and is provided slidably toward the mounting portion corresponding portion 41. The slide mold 60 can move in the vertical direction of the base material 11. That is, the sliding direction of the slide mold 60 is different from the direction in which the movable mold as the main mold 40 moves. By bringing the slide mold 60 close to the mounting portion corresponding portion 41, a space (cavity) corresponding to the shape of the mounting portion 20 is formed between the slide mold 60 and the mounting portion corresponding portion 41. The formed cavity is filled with a molten resin and cooled to produce a resin molded article 10 (see fig. 2).

Refer to fig. 8. The slide mold 60 includes: a pair of 1 st side wall surfaces 61 constituting a part of the side surfaces; a step surface 62 extending from the ends of the 1 st side wall surfaces 61 in a direction approaching each other; a 2 nd side wall surface 63 extending in a direction away from the 1 st side wall surface 61 with the end of the step surface 62 as a starting point; a connecting surface 64 connecting ends of these 2 nd side wall surfaces 63; an upper surface 67 covering the 1 st side wall surface 61, the step surface 62, the 2 nd side wall surface 63, and the connection surface 64; and a protrusion 69 protruding outward from lower portions of the 1 st side wall surface 61, the stepped surface 62, the 2 nd side wall surface 63, and the connection surface 64.

projection-portion cutout portions 69a and 69a formed in a cutout shape are formed at the tip end of the projection portion 69.

Reference is also made to fig. 9. The projecting portion 69 is separated from the mounting portion corresponding portion 41 at a portion below the 1 st side wall surface 61, and cavities Ca and Ca are formed between the projecting portion and the mounting portion corresponding portion 41. The projecting portion 69 is closely attached to the mounting portion corresponding portion 41 at a position below the 2 nd side wall surface 63 and the stepped surface 62. Therefore, no resin is filled in this portion. The portion of the protruding portion 69 located below the connection surface 64 is in close contact with the mounting portion corresponding portion 41 except for the protruding portion cutaway portions 69a, 69 a. In other words, the projecting portion cutaway portions 69a, 69a are separated from the mounting portion corresponding portion 41, and cavities Ca, Ca are formed between them and the mounting portion corresponding portion 41.

refer to fig. 4 and 10. By filling the cavity Ca (see fig. 9) with resin, the 1 st side wall portion 21 continuous with the base material 11 can be formed. Further, the connecting portion 26 can be formed continuously with the base material 11 and having a smaller wall thickness than the connecting portion 24.

The resin molded article 10 described above achieves the following effects.

Refer to fig. 4. The 1 st side wall portion 21 rises from the rear surface 11b of the substrate 11, and a gap Sp is formed between the step portion 22, the 2 nd side wall portion 23, and the connection portion 24 and the substrate 11. The 1 st side wall portion 21 adjacent to the opening 28 rises from the back surface 11b of the base material 11. This ensures the mounting rigidity of the portion adjacent to the opening 28. On the other hand, a gap Sp is formed between the connection portion 24, the step portion 22, the 2 nd side wall portion 23, and the substrate 11. By reducing the portions that are likely to shrink, it is possible to provide a resin molded article 10 that can ensure high aesthetic quality.

Refer to fig. 6 and 10. It is assumed that the side wall portion 25 is formed in a flat plate shape and only a portion near the opening 28 is formed continuously with the base material 11. At this time, if the slide mold 60 is slid from the portion serving as the opening 28, the mold cannot be released from the side wall 25. I.e., becomes a barb (under cut). In order to demold the slide mold, a plurality of slide molds are required. In the present invention, the side wall portion 25 has the step portion 22. Thus, the gap between the connection portion 24, the step portion 22, and the 2 nd side wall portion 23 and the base material 11 can be formed to have an arbitrary size by one slide mold while the 1 st side wall portion 21 and the rear surface 11b of the base material 11 are continuously raised. Since the resin molded product can be manufactured using a small number of slide molds, the manufacturing cost of the resin molded product 10 can be reduced.

Further, since the step portion 22 is formed as described above, occurrence of an barb can be prevented. By adjusting the slide mold, the length and thickness of the connecting portion 26 can be easily adjusted. By performing adjustment to gradually lengthen or thicken the connecting portion 26, it is possible to suppress the occurrence of contraction and to ensure sufficient mounting rigidity.

Refer to fig. 3. The outer surface of the coupling portion 26 is continuous with the outer surface of the coupling portion 24, and the thickness of the coupling portion 26 is smaller than that of the coupling portion 24. By increasing the mounting rigidity of the mounting portion 20 and reducing the thickness, the occurrence of shrinkage can be suppressed. Further, by forming the outer surface of the connecting portion coupling portion 26 to be coplanar with the outer surface of the connecting portion 24, the shape of the molding die can be simplified.

The length L2 of the 1 st side wall part 21 is shorter than the length L3 of the 2 nd side wall part 23. By making the length L2 of the 1 st side wall part 21 shorter than the length of the 2 nd side wall part 23, the portion that is likely to be shrunk can be further reduced, and high aesthetic quality of the resin molded article 10 can be ensured.

Next, embodiment 2 will be explained with reference to the drawings.

< example 2 >

Fig. 11 is a perspective view showing a mounting portion formed on the resin molded article of example 2. Fig. 11 corresponds to fig. 5.

in the resin molded article 10A of example 2, the connecting portion 26A formed on the mounting portion 20A is formed along the 2 nd side wall portion 23. The other basic configuration is the same as that of the resin molded article 10 (see fig. 5) of example 1. The same portions as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

The connecting portion 26A has a substantially triangular shape and is provided substantially parallel to the 1 st side wall portion 21 and the 2 nd side wall portion 23. The connecting portion coupling portion 26A is also provided substantially parallel to the 1 st side wall portion coupling portion 21 b. The connecting portion 26A may have a substantially rectangular shape, and may have any shape.

The resin molded article 10A of example 2 having the above configuration also achieves the effects specified by the present invention.

Next, embodiment 3 will be explained with reference to the drawings.

< example 3>

Refer to fig. 12. Fig. 12A shows a mounting portion formed on the resin molded article of example 3 in a state viewed from below. Fig. 12B shows a mounting portion formed on the resin molded article of example 3 in a state viewed from above. Fig. 12A corresponds to fig. 5. Fig. 12B corresponds to fig. 4.

In the resin molded article 10B of example 3, the 1 st side wall body portion 21Ba constituting the mounting portion 20B is formed in a substantially L-shape. The other basic configuration is the same as that of the resin molded article 10 (see fig. 5) of example 1. The same portions as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

The 1 st side wall portion 21B has: a 1 st side wall body 21Ba formed in a substantially L shape; and a 1 st sidewall part coupling part 21Bb extending from a lower part of the 1 st sidewall part main body 21Ba to the rear surface 11b of the base material 11.

The 1 st sidewall body portion 21Ba includes: a 1 st body portion 21Bc extending substantially perpendicularly to the step portion 22; and a 2 nd body 21Bd extending at an end of the 1 st body 21Bc so as to be spaced apart from the opening 28.

The 1 st side wall portion coupling portion 21Bb is formed below the end portion of the 2 nd main body portion 21 Bd. On the other hand, the 1 st side wall portion coupling portion 21Bb is not formed at a part of the lower portion of the 2 nd main body portion 21 Bd. That is, the 1 st side wall portion coupling portion 21Bb is formed at a portion of the lower portion of the 2 nd main body portion 21 Bd.

When the end portion of the 2 nd body portion 21Bd connected to the 1 st body portion 21Bc is one end and the opposite end portion is the other end, the 1 st side wall portion connecting portion 21Bb is preferably formed at a portion including at least a lower portion of the other end.

The 1 st side wall portion coupling portion 21Bb is formed substantially parallel to the connection portion coupling portion 26. The upper surface (outer surface) of the 1 st side wall portion coupling portion 21Bb is continuous with the upper surface (outer surface) of the 2 nd main body portion 21 Bd. The thickness of the 1 st side wall portion coupling portion 21Bb is smaller than that of the 2 nd main body portion 21 Bd.

the resin molded article 10B of example 3 having the above configuration also achieves the effects specified by the present invention.

The outer surface of the 1 st side wall portion coupling portion 21Bb is continuous with the outer surface of the 1 st side wall portion main body portion 21Ba, and the thickness of the 1 st side wall portion coupling portion 21Bb is smaller than the thickness of the 1 st side wall portion main body portion 21 Ba. By increasing the mounting rigidity of the mounting portion 20B and making the thickness thinner, the occurrence of shrinkage can be suppressed. Further, the shape of the molding die can be simplified by making the outer surface of the 1 st side wall part coupling part 21Bb flush with the outer surface of the 1 st side wall part main body part 21 Ba.

Next, embodiment 4 will be explained with reference to the drawings.

< example 4>

Refer to fig. 13. Fig. 13 shows a mounting portion formed on the resin molded article of example 4 in a state viewed from the front. Fig. 13 corresponds to fig. 6.

In the resin molded article 10C of example 4, the 2 nd side wall portion coupling portion 26C is formed from the lower portion of the 2 nd side wall portion 23 to the rear surface 11b of the base material 11. On the other hand, the joint coupling portion 26 is not formed at the lower portion of the joint 24 (see fig. 6). The other basic configuration is the same as that of the resin molded article 10 (see fig. 6) of example 1. The same portions as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

The mounting portion 20C includes a 2 nd side wall portion coupling portion 26C extending from a lower portion of the 2 nd side wall portion 23 to the rear surface 11b of the base material 11. The 2 nd side wall portion coupling portion 26C is formed substantially parallel to the 1 st side wall portion coupling portion 21 b. The outer surface of the 2 nd side wall part coupling part 26C is continuous with the outer surface of the 2 nd side wall part 23. The thickness of the 2 nd side wall coupling portion 26C is smaller than that of the 2 nd side wall 23.

The direction perpendicular to the thickness direction of the 2 nd side wall portion 23 is defined as the longitudinal direction. The 2 nd side wall portion coupling portion 26C is formed at a part of the lower portion of the 2 nd side wall portion 23 with respect to the longitudinal direction of the 2 nd side wall portion 23. By aligning the longitudinal directions of the 1 st side wall connecting portion 21b and the 2 nd side wall connecting portion 26C, a reduction in appearance can be suppressed.

The resin molded article 10C of example 4 having the above configuration also achieves the effects specified by the present invention.

The outer surface of the 2 nd side wall coupling portion 26C is continuous with the outer surface of the 2 nd side wall portion 23, and the thickness of the 2 nd side wall coupling portion 26C is smaller than the thickness of the 2 nd side wall portion 23. By increasing the mounting rigidity of the mounting portion 20 and reducing the thickness, the occurrence of shrinkage can be suppressed. Further, by forming the outer surface of the 2 nd side wall portion coupling portion 26C to be flush with the outer surface of the 2 nd side wall portion 23, the shape of the molding die can be simplified.

Further, since the step portion 22 is formed as described above, occurrence of an barb can be prevented. The length and thickness of the 2 nd side wall connecting portion 26C can be easily adjusted by adjusting the slide mold. By adjusting the 2 nd side wall connecting portion 26C to be gradually longer or thicker, it is possible to suppress the occurrence of shrinkage and to secure sufficient mounting rigidity.

Next, embodiment 5 will be explained with reference to the drawings.

< example 5 >

refer to fig. 14. Fig. 14 shows a mounting portion formed on the resin molded article of example 5 in a state viewed from the front.

In the resin molded article 10D of example 5, the stepped portion coupling portion 26D is formed from the lower portion of the stepped portion 22 to the back surface 11b of the substrate 11. On the other hand, the joint coupling portion 26 is not formed at the lower portion of the joint 24 (see fig. 12). The other basic configuration is the same as that of the resin molded article 10B (see fig. 12A) of example 3. The same portions as those in embodiment 3 (including the same portions as those in embodiment 1) are denoted by the same reference numerals, and detailed description thereof is omitted.

the mounting portion 20D includes a stepped portion coupling portion 26D extending from a lower portion of the stepped portion 22 to the back surface 11b of the substrate 11. The stepped portion coupling portion 26D is formed substantially parallel to the 1 st side wall portion coupling portion 21 b. The upper surface (outer surface) of the stepped portion coupling portion 26D is continuous with the upper surface (outer surface) of the stepped portion 22. The wall thickness of the step portion coupling portion 26D is thinner than that of the step portion 22.

The direction perpendicular to the thickness direction of the step portion 22 is defined as the longitudinal direction. The stepped portion coupling portion 26D is formed at a portion of the lower portion of the stepped portion 22 with respect to the longitudinal direction of the stepped portion 22.

The resin molded article 10D of example 5 having the above configuration also achieves the effects specified by the present invention.

The outer surface of the stepped portion coupling portion 26D is continuous with the outer surface of the stepped portion 22, and the wall thickness of the stepped portion coupling portion 26D is thinner than the wall thickness of the stepped portion 22. By increasing the mounting rigidity of the mounting portion 20 and reducing the thickness, the occurrence of shrinkage can be suppressed. Further, by forming the outer surface of the stepped portion coupling portion 26D to be flush with the outer surface of the stepped portion 22, the shape of the molding die can be simplified.

further, since the step portion 22 is formed as described above, occurrence of an barb can be prevented. By adjusting the slide mold, the length and thickness of the stepped portion coupling portion 26D can be easily adjusted. By adjusting the stepped portion connecting portion 26D to be gradually longer or thicker, it is possible to suppress the occurrence of shrinkage and to secure sufficient mounting rigidity.

the resin molded article of the present invention has been described by taking as an example a resin member to be mounted on a vehicle, but the present invention is not limited to these embodiments and may be applied to other than vehicles.

Further, the embodiments may also be combined as appropriate. For example, the substantially triangular connecting portion 26A may be used as a connecting portion connected to the back surface of the substrate 11 from the stepped portion. Further, two or more types of the connection portion, the 2 nd side wall portion connection portion, and the step portion connection portion may be formed in one mounting portion as long as a gap is formed. In addition, when the 1 st side wall portion 21B having a substantially L-shape is used, the 1 st side wall portion coupling portion 21Bb may be formed also in the 1 st main body portion 21 Bc.

That is, the present invention is not limited to the examples as long as the action and effect of the present invention are obtained.

Industrial applicability

The resin molded article of the present invention is preferably used as a part for decorating a vehicle.