JP7781107B2 - Vehicle cover device - Google Patents

Description

The present invention relates to a vehicle cover device and a resin molding die for molding the base material of this vehicle cover device.

Many vehicles, such as passenger cars, are equipped with various types of vehicle cover devices. These vehicle cover devices cover the exterior and interior of the vehicle body. One example of a vehicle cover device is a configuration in which a grill garnish is attached to a radiator grill (a type of base material). Prior art related to vehicle cover devices is disclosed in Patent Document 1 (see Figures 2 and 7).

The vehicle cover device shown in Patent Document 1 includes a resin radiator grill (corresponding to the base material) that draws airflow into a radiator mounted at the front of the vehicle body. A band-shaped resin grill garnish (corresponding to a decorative element) is attached to the front of the radiator grill with screws. The grill garnish has bosses (corresponding to fixed parts) that protrude from its back surface toward the radiator grill.

The cross-sectional shape of the radiator grille's boss-mounting section (corresponding to the fixing section) is roughly M-shaped. Specifically, the fixing section is integrally formed from a pair of vertical plate members facing each other with a gap between them, and a connecting member with a roughly U-shaped cross section that is located between the plate members and connects the front ends of the plate members. This connecting member is composed of a pair of vertical connecting plates that extend toward each other from the front end to the rear end of each plate member, and horizontal mounting seats that connect the rear ends of each connecting plate. The connecting plates are inclined at an acute angle relative to the plate members. A grill garnish can be attached to the front of the radiator grille by fastening the boss inserted between the pair of connecting plates to the mounting seat with screws.

Japanese Patent Application Laid-Open No. 2004-352136

Generally, in the configuration of a vehicle cover device such as that shown in Patent Document 1, the relationship between the radiator grille and the grille garnish is set with consideration given to the overall vehicle design. For example, the grille garnish is often set to a size that does not protrude beyond the radiator grille when viewed from the front of the vehicle. In other words, the spacing between the pair of plate members at the fixing part on the radiator grille is set with consideration given to the functionality and design of the radiator grille. The width of the grille garnish is set to be the same as or smaller than the spacing between the pair of plate members at the fixing part. The shape and size of the bosses formed on the grille garnish are set to match the grille garnish.

If the width of the grille garnish is narrow compared to the distance between the pair of plate members, it is necessary to take measures to ensure that there are no gaps between each plate member and the edge of the grille garnish when the vehicle is viewed from the front. Otherwise, the mounting bases of the fixing parts will be visible through the gaps.

The radiator grille in Patent Document 1 is equipped with a pair of vertical connecting plates that extend toward each other from the front end to the rear end of a pair of plate members, making the mounting seat invisible from the front of the vehicle. However, the angle of inclination of the connecting plates relative to the plate members is small. As a result, in order to mold the narrow space (small space) between the plate members and the connecting plates with resin, the thickness of the mold (space-forming portion) that forms this small space must be extremely thin. The pressure inside the mold when molten resin is filled into the small space places a large load on the space-forming portion. This is detrimental to ensuring the durability of the space-forming portion of the mold.

One solution to this problem is to seal the small space between the plate member and the connecting plate by molding the resin as a single piece. However, this would result in unnecessary thickness (waste material). This waste material can cause sink marks on the design surface of the radiator grille due to shrinkage caused by the resin hardening during molding, which is a disadvantage in terms of improving the quality of the radiator grille.

The objective of this disclosure is to provide technology that improves the quality of vehicle cover devices while ensuring the durability of resin molding molds.

According to the present invention, firstly, a decorative item is provided, which comprises a base material made of an integrally molded resin product having an H-shaped cross section, the base material being made of a pair of plate-shaped plate members facing each other with a gap therebetween and a mounting seat connecting the pair of plate members, and a decorative item that can be attached to the base material,
The pair of plate members integrally have a pair of plate-shaped protrusions that protrude from one end of each plate member in directions facing each other,
the decorative article has an integral fixed portion that can be fitted between the tips of the pair of protruding portions,
The vehicle cover device is provided, wherein the fixed portion is fitted between the tip ends of the pair of protrusions and fastened to the mounting seat by a fastening member.

Secondly, preferably, in the vehicle cover device described in paragraph 1, the fixed portion has an integral locking portion protruding from a side surface of the fixed portion, and the mounting seat has a retaining hole that can temporarily hold the locking portion when the fixed portion is fitted between the tips of the pair of protruding portions.

Thirdly, preferably, in the vehicle cover device described in paragraphs 1 and 2, the decorative item has a strip shape with a U-shaped cross section, one end of the decorative item has the fixed portion, the other end of the decorative item has a hook piece, and the base material has a hook portion on which the hook piece can be hooked.

According to the present invention, fourthly, a base material made of an integrally molded resin product, the base material having an H-shaped cross section made up of a pair of plate-like plate members facing each other with a gap between them and a mounting seat connecting the pair of plate members, the base material having a fixing portion including a pair of plate-like protrusions protruding in directions facing each other from one end of each of the pair of plate members, a pair of spaces defined by the pair of plate members, the mounting seat and the pair of protrusions, and an extension plate extending from one end of the mounting seat in a direction along the plate surfaces of the pair of plate members and the seat surface of the mounting seat towards the pair of protrusions;
a decorative item that can be attached to the base material;
A resin molding die for molding the base material of a vehicle cover device, comprising:
a slide mold that is movable in a direction along the plate surfaces of the pair of plate members and the seat surface of the mounting seat to form the pair of spaces, a fixed mold that is used to form the remaining portion of the base material, and a movable mold that is openable and closable relative to the fixed mold,
The fixed type has a partition surface that separates the pair of spaces,
the slide mold has a slide base and a pair of space-forming protrusions provided on the slide base to form the pair of spaces,
The resin molding mold is provided, wherein the pair of space forming protrusions are positioned so as to be able to come into contact with the partition surface of the fixed mold when the movable mold is clamped to the fixed mold.

Fifth, preferably, the resin molding mold according to the fourth aspect,
The extension plate of the base material has a through hole,
the slide mold has a hole-forming protrusion provided on the slide base for forming the through hole,
The pair of space-forming protrusions are set to be longer than the hole-forming protrusions.

This invention provides technology that improves the quality of vehicle cover devices while ensuring the durability of resin molding molds.

1 is a front view of a vehicle cover device according to an embodiment. FIG. 2 is a cross-sectional view taken along the line 2-2 of FIG. FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. FIG. 4 is an enlarged view of part 4 of FIG. 3. 5 is a cross-sectional view taken along the line 5-5 of FIG. 4. 6 is an exploded view of the fixing portion of the grille member and the fixed portion of the decorative item shown in FIG. 5. FIG. 7A is a view of the grill member shown in FIG. 4 as seen from the direction of arrow 7A, and FIG. 7B is a view of the grill member shown in FIG. 4 as seen from the direction of arrow 7B. 8A is a diagram illustrating the state in which the fixed part is being assembled to the fixing part shown in FIG. 4, and FIG. 8B is a diagram illustrating the state in which the fixed part is completely assembled to the fixing part shown in FIG. 8A. 9A is a cross-sectional view of a portion of the resin molding die used to mold the grill member shown in FIG. 4 that molds the area around the fixing portion, and FIG. 9B is a cross-sectional view taken along the line 9B-9B of FIG. 9A. 9B is a cross-sectional view taken along the line 10-10 of FIG. 9A. FIG. 11 is a cross-sectional view of the resin molding die shown in FIG. 10 in a mold-opened state. FIG. 12 is a perspective view showing a cross section of a part of the resin molding mold in the mold open state shown in FIG. 11 .

Embodiments of the present invention will be described below with reference to the attached drawings. Note that the embodiments shown in the attached drawings are merely examples of the present invention, and the present invention is not limited to these embodiments. In the description, left and right refer to left and right relative to the occupant in the vehicle, and front and rear refer to front and rear relative to the direction of travel of the vehicle. In addition, in the drawings, Fr refers to front, Rr refers to rear, Le refers to left as seen by the occupant, Ri refers to right as seen by the occupant, Up refers to top, and Dn refers to bottom.

<Example>
The embodiment will be described with reference to the drawings.

As shown in FIG. 1, the vehicle cover device 10 covers the exterior of a vehicle body (not shown) such as a passenger car. As an example of this vehicle cover device 10, a configuration covering the front part of the vehicle body will be described. However, the vehicle cover device 10 is not limited to a configuration covering the front part of the vehicle body, and can also be applied to a configuration covering, for example, the entire exterior of the vehicle body or the interior of the vehicle body (including the passenger compartment).

The vehicle cover device 10 includes a resin front grille 20 for drawing airflow into a radiator (not shown) mounted at the front of the vehicle body, and multiple garnishes 30 arranged on the front surface 20a of the front grille 20.

The front grille 20 comprises, for example, a picture frame-shaped frame 21 and multiple vertical strip-shaped grill elements 22 arranged within the frame 21. Referring also to Figure 2, the grill elements 22 are configured with a pair of plate-shaped side panels 23, 23 facing each other with a gap between them, and a front panel 24 connecting the front ends of the pair of side panels 23, 23, forming a U-shaped (including approximately U-shaped) cross section. Note that the front grille 20 is not limited to a configuration consisting of multiple vertical strip-shaped grill elements 22 alone; it may also be, for example, a configuration consisting of only multiple horizontal strip-shaped grill elements, or it may be configured in a lattice shape by combining multiple horizontal strip-shaped bars (not shown).

As shown in Figures 1 to 3, the multiple garnishes 30 are configured in the form of vertical strips extending along the front surface 22a (front surface 24a of the front panel 24) of each vertical strip-shaped grill member 22, overlapping the front surface 22a. The cross section of the garnish 30 is U-shaped (including approximately U-shaped) like the cross section of the grill member 22.

The front grille 20 may be referred to as the "base material 20" or the "first cover body 20" as appropriate. The garnish 30 may be referred to as the "decorative part 30" or the "second cover body 30" as appropriate.

Next, we will explain the structure for attaching the decorative item 30 to the base material 20. Note that to make the explanation easier to understand, the orientation of Figure 5 is the same as that of Figure 2.

As shown in Figure 4, the decorative item 30 has a boss 31 formed on its top. This boss 31 protrudes from the back surface 30a of the decorative item 30 toward the base material 20. The tip surface 32 of the boss 31 is configured as a flat surface, and can be attached to the base material 20. This boss 31 may be referred to as the "fixed portion 31" as appropriate.

As shown in Figures 5 and 6, each grill member 22 of the base material 20 is provided with a fixing portion 40 for individually fixing the fixed portion 31 of each decorative item 30. These fixing portions 40 are formed integrally with the grill member 22 of the base material 20. More specifically, this fixing portion 40 is configured with an H-shaped (including approximately H-shaped) cross section, consisting of a pair of plate-shaped members 41, 41 facing each other with a distance D1 (see Figure 6) between them, and a plate-shaped mounting seat 42 connecting the pair of plate members 41, 41.

The pair of plate members 41, 41 can also be served by, for example, the pair of side plates 23, 23 constituting the grill member 22 shown in FIG. 2. As shown in FIG. 6, the thickness Th of each plate member 41, 41 is constant (including approximately constant). Each pair of plate members 41, 41 integrally has a pair of plate-shaped protrusions 43, 43 that protrude toward each other from one end 41a, 41a (front end 41a, 41a). The protrusion amount of each protrusion 43, 43 is Pa. The separation distance D2 between the tips 43a, 43a of the pair of protrusions 43, 43 (between the protruding surfaces 43a, 43a) is the difference between the distance D1 between the plate members 41, 41 and the protrusion amount Pa, Pa of each protrusion 43, 43.

The mounting seat 42 is located rearward of the front surface 20a of the base material 20 (the front surface 22a of the grill member 22). The front surface 42a of the mounting seat 42 is sometimes referred to as the "seat surface 42a" as appropriate.

Furthermore, the mounting seat 42 has a through-hole 44 that penetrates the mounting seat 42 in the plate thickness direction. The center line CL of this through-hole 44 is located in the center of the mounting seat 42 and is perpendicular to the seat surface 42a of the mounting seat 42. The tip surface 32 of the fixed portion 31 overlaps the seat surface 42a of the mounting seat 42. A screw member 45 (fastening member 45), such as a tapping screw, inserted through the through-hole 44 fastens the fixed portion 31 to the mounting seat 42.

Furthermore, the fixed portion 40 has a pair of spaces 46, 46 defined by a pair of plate members 41, 41, a mounting seat 42, and a pair of protrusions 43, 43.

The procedure for fixing the fixed portion 31 to the fixing portion 40 is as follows (see FIG. 5).
The fixed portion 31 of the decorative item 30 can be fitted between the tips 43a, 43a of the pair of protrusions 43, 43 of the fixing portion 40. First, the fixed portion 31 is fitted between the tips 43a, 43a of the protrusions 43, 43 from the front surface 20a of the base material 20. Next, the tip surface 32 of the fixed portion 31 is overlapped with the seat surface 42a of the mounting seat 42. As a result, the base 30a of the decorative item 30 is positioned between the pair of protrusions 43, 43, and the fixed portion 31 is positioned between the seat surface 42a of the mounting seat 42 and the pair of protrusions 43, 43. Finally, a screw member 45 (fastening member 45), such as a tapping screw, is inserted into the through hole 44 of the mounting seat 42 from the back side of the base material 20 and screwed into the fixed portion 31. This completes the process of fixing the fixed portion 31 to the fixing portion 40.

As shown in Figures 4, 7A, and 7B, the pair of plate members 41, 41 of the fixing portion 40 extend in the longitudinal direction (vertical direction) of the grill member 22. When the vertical strip-shaped grill member 22 is viewed from the back side, the mounting seat 42 is rectangular (including approximately rectangular). The rectangular mounting seat 42 has four edges 42b-42e (edges 42b-42e) around the seat surface 42a (see Figure 6).

Of the four ends 42b-42e of the rectangular mounting base 42, the first and second joining ends 42b and 42c, which face each other, connect the pair of plate members 41, 41. The other two ends 42d and 42e of the mounting base 42 (the upper third end 42d and the lower fourth end 42e) are positioned in a direction that intersects with the first and second joining ends 42b and 42c. Plate-shaped wall panels 47 and 48 are integrally formed with the third end 42d and fourth end 42e of the mounting base 42, and each extend toward the back surface 24b of the front panel 24 of the grill member 22. The pair of wall panels 47 and 48 form part of the mounting base 42.

As shown in FIG. 4, when viewing the base 20 from the width direction, the mounting seat 42 is configured in a U-shape with an open front. These wall plates 47, 48 are also integrated with the front panel 24. Of the pair of wall plates 47, 48, the upper wall plate 47 is sometimes referred to as the "first wall plate 47," and the lower wall plate 48 is sometimes referred to as the "second wall plate 48" or "extension plate 48." In other words, as shown in FIGS. 6 and 7A, the extension plate 48 extends from one end 42e toward the pair of protrusions 43, 43 in a direction (indicated by arrow R1) along the plate surfaces 41b, 41b (inner surfaces 41b, 41b) of the pair of plate members 41, 41 of the mounting seat 42 and the seat surface 42a of the mounting seat 42.

The inner wall surface 47a of the first wall panel 47 is parallel (including approximately parallel) to the center line CL of the through hole 44. The second wall panel 48 is composed of a straight plate 51 connected to the mounting seat 42 and an inclined plate 52 connected to the tip of this straight plate 51. The inner wall surface 51a of the straight plate 51 faces and is parallel (including approximately parallel) to the inner wall surface 47a of the first wall panel 47. The straight plate 51 has a rectangular through hole 53 that penetrates the plate thickness. This through hole 53 may be referred to as the "retaining hole 53" as appropriate. The inclined plate 52 extends from the tip of the straight plate 51 toward the back surface 24b of the front panel 24, inclining away from the first wall panel 47.

The second wall plate 48 (extension plate 48) can be summarized as follows. This second wall plate 48 extends from end 42e (fourth end 42e) of the mounting base 42, which is one of the four ends 42b-42e, intersecting the joining ends 42b, 42c (first end 42b and second end 42c) connecting the pair of plate members 41, 41, toward the pair of protrusions 43, 43 (the decorative item 30 side). This second wall plate 48 has a through hole 53 (retaining hole 53).

As shown in Figure 4, the fixed portion 31 is located at the upper end of the decorative item 30. When this fixed portion 31 is fastened to the mounting base 42, the upper surface 31a (one end surface 31a) of the fixed portion 31 is in contact with the inner wall surface 47a of the first wall panel 47, and the lower surface 31b (other end surface 31b) of the fixed portion 31 is spaced apart from the inner wall surface 51a of the straight plate 51 of the second wall panel 48.

Furthermore, the fixed portion 31 has an integral locking portion 33 that protrudes from the lower surface 31b facing the second wall panel 48. Referring also to Figure 5, when the fixed portion 31 is fitted between the tips 43a, 43a of the pair of protrusions 43, 43, the tip of the locking portion 33 fits into the retaining hole 53. When the upper surface 31a of the fixed portion 31 is in contact with the inner wall surface 47a of the first wall panel 47, the amount of fit (fitting depth) by which the tip of the locking portion 33 fits into the retaining hole 53 is set to a small value so that the tip does not slip out of the retaining hole 53. Because the tip of the locking portion 33 fits into the retaining hole 53, it is possible to temporarily hold the locking portion 33 against the edge of the retaining hole 53 before fastening the fixed portion 31 to the fixing portion 40.

As shown in FIG. 3, the decorative item 30 has a hook piece 61 formed on the lower end 30b and an insertion piece 62 formed on the upper end 30c. The hook piece 61 has an L-shaped (including approximately L-shaped) cross section that extends rearward and downward (toward the base material 20) from the lower end 30b of the decorative item 30. The lower end surface 61a of this hook piece 61 has a stepped (concave) shape. The insertion piece 62 is a horizontal plate-like piece that extends horizontally from the upper end rearward (toward the base material 20). In other words, one end 30c (upper end 30c) of the decorative item 30 has a fixed portion 31 and an insertion piece 62. The other end 30b (lower end 30b) of the decorative item 30 has the hook piece 61. The fixed portion 31 is located closer to the insertion piece 62.

On the other hand, the base material 20 has a latch portion 63 onto which the hook piece 61 can be latched, and a horizontal recess 64 into which the insertion piece 62 can be inserted. The latch portion 63 is, for example, in the form of a through-hole formed in the base material 20, penetrating the base material 20 in the front-to-rear direction. The lower edge 63a of this through-hole 63 (latching portion 63) has a stepped configuration. By making both the lower edge 63a of the through-hole 63 and the lower end surface 61a of the hook piece 61 stepped, it is possible to prevent misalignment between them in the front-to-rear direction.

The procedure for assembling the decorative element 30 to the grille member 22 is as follows (see Figure 3). First, tilt the upper end 30c of the decorative element 30 toward the front of the base material 20, and hook the hook piece 61 on the lower end 30b of the decorative element 30 onto the hook portion 63 of the base material 20.

Next, as shown in Figure 8A, while lifting the upper part of the decorative item 30 toward the base material 20, the fixed portion 31 is pushed toward the seat surface 42a of the mounting seat 42 (in the direction of arrow R11). At this time, the tip of the locking portion 33 is guided by the inner wall surface 52a of the inclined plate 52 and lifts (displaced in the direction of arrow R12). If the fixed portion 31 is further pushed in after it hits the inner wall surface 47a of the first wall panel 47, the pushing force causes the tip of the locking portion 33 to elastically deform the second wall panel 48 downward (in the direction of arrow R13). As a result, as shown in Figure 8B, the tip of the locking portion 33 fits into the retaining hole 53. The locking portion 33 is then temporarily held against the edge of the retaining hole 53.

Finally, the tip surface 32 of the fixed portion 31 is placed over the seat surface 42a of the mounting seat 42, and the fixed portion 31 is fastened to the mounting seat 42 with the fastening member 45. The fastening result is shown in Figure 4. This completes the assembly of the decorative item 30 to the grille member 22.

Next, we will explain the resin molding die 100 used to resin mold the substrate 20, with reference to Figures 9A to 12.

As shown in Figures 9A, 9B, and 10, the resin molding mold 100 includes a fixed mold 110, a movable mold 120 that can be opened and closed relative to the fixed mold 110, and a sliding mold 130 that can slide in a direction different from the opening and closing direction of the movable mold 120.

The fixed mold 110 forms a female mold (cavity) and has a molding surface 111 that mainly molds the front surface 20a of the base material 20 shown in Figure 1. More specifically, the molding surface 111 of this fixed mold 110 is a portion used to mainly mold the outer surfaces 41c, 41c of the pair of plate members 41, 41, the outer surfaces 43b, 43b (bottom surfaces 43b, 43b) of the pair of protrusions 43, 43, and the seat surface 42a of the mounting seat 42, as shown in Figure 11. The bottom surface 112 of the molding surface 111 is a portion used to mold the outer surfaces 43b, 43b of the protrusions 43, 43.

Furthermore, the fixed mold 110 has an extension 114 that extends from the bottom surface 112 toward the open end surface 113. The tip surface 114a of this extension 114 is the surface that forms the seat surface 42a of the mounting seat 42, and has a rectangular shape (including a substantially rectangular shape) in plan view.

Of the side surfaces 114b-114e of the extension portion 114, the opposing first side surface 114b and second side surface 114c form the protruding surfaces 43a, 43a of the protrusions 43, 43, and also serve as partition surfaces that separate the pair of spaces 46, 46 (see Figure 6). The first side surface 114b and second side surface 114c of the extension portion 114 may be referred to as the "partition surfaces 114b, 114c" as appropriate. Of the side surfaces 114b-114e of the extension portion 114, the third side surface 114d, which intersects with the first side surface 114b and second side surface 114c, forms the inner surface 47a of the first wall panel 47 of the fixed portion 40 (see Figure 4). Furthermore, of the side surfaces 114b to 114e of the extension portion 114, the fourth side surface 114e, which faces the third side surface 114d, is the surface that forms the inner surface 48a of the second wall panel 48 (see Figure 8A) of the fixed portion 40.

The movable mold 120 constitutes a male mold (core) and has a molding surface 121 that mainly molds the back surface of the substrate 20. This movable mold 120 can be opened and closed relative to the opening end surface 113 of the fixed mold 110. More specifically, the molding surface 121 of this movable mold 120 cooperates with the fixed mold 110 to mainly mold part of the inner surfaces 41b, 41b of the pair of plate members 41, 41 shown in Figures 6 and 11, and the mounting seat 42.

The sliding mold 130 has a molding surface 131 that mainly molds the interior of the substrate 20, and is slidable in a direction toward or away from the fourth side surface 114e of the extension portion 114 of the fixed mold 110 (the direction of arrow R21 in Figure 9A). The sliding mold 130 operates either in a linked manner in conjunction with the movement of the movable mold 120, or in an independent manner in which it operates independently of the movement of the movable mold 120. The linked manner is preferred.

More specifically, the slide mold 130 is capable of forming the outer surface 48b (see Figure 8A) of the second wall panel 48 of the fixed part 40, the through-hole 53 (retaining hole 53), and the pair of spaces 46, 46 (see Figure 6). As shown in Figure 12, for example, the slide mold 130 has a so-called fork-shaped configuration, including a slide base 132 that can slide in the direction of arrow R21, and a pair of space-forming protrusions 133, 133 provided on the slide base 132.

The slide base 132 has a base tip surface 132a for forming the outer wall surface 48b (see Figure 8A) of the second wall panel 48, and a hole-forming protrusion 132b for forming the through hole 53 (see Figure 8A) in the second wall panel 48. The base tip surface 132a faces the fourth side surface 114e of the extension portion 114. The pair of space-forming protrusions 133, 133 are portions for forming the pair of spaces 46, 46 (see Figure 6) and extend from the base tip surface 132a toward the fixed mold 110. The fitting position (set position) of the slide mold 130 relative to the fixed mold 110 is determined by the hole-forming protrusion 132b contacting the fourth side surface 114e of the extension portion 114. The second wall panel 48 can be molded from resin using the space between the fourth side surface 114e of the extension portion 114 and the base tip surface 132a of the slide base 132.

The pair of space-forming protrusions 133, 133 are set longer than the hole-forming protrusion 132b relative to the base tip surface 132a. As shown in FIG. 9B, the opposing surfaces 133a, 133a of the pair of space-forming protrusions 133, 133 are positioned so that they can abut (closely contact) the first side surface 114b and the second side surface 114c of the extension portion 114 when the slide mold 130 is set (clamped) relative to the fixed mold 110. This restricts the flow of molten resin between the first side surface 114b and the second side surface 114c and the opposing surfaces 133a, 133a. Preferably, as shown in FIG. 9B, the first side surface 114b and the second side surface 114c and the opposing surfaces 133a, 133a are tapered, widening toward the direction in which the slide mold 130 is fitted into the fixed mold 110. This enhances the effect of restricting the flow of molten resin.

In this way, the fixed mold 110 and the movable mold 120 can mold the remaining portions of the base material 20 except for the pair of spaces 46, 46 and the inner surface 48a of the extension plate 48 (second wall plate 48).

The method for forming the substrate 20 (fixing portion 40) is as follows.
First, as shown in Fig. 10, the movable die 120 and the sliding die 130 are clamped to the fixed die 110. Next, a cavity 140 formed in the molding die by the fixed die 110, the movable die 120, and the sliding die 130 is filled with molten resin. Next, after the molten resin has solidified, as shown in Fig. 11, the movable die 120 and the sliding die 130 are opened relative to the fixed die 110, and the resin-molded substrate 20 (fixed portion 40) is removed from the cavity 140. This completes the molding process of the substrate 20.

The explanation of the above example can be summarized as follows:

As shown in Figures 5 and 6, the vehicle cover device 10 includes a base material 20 (first cover body 20) made of a single-piece resin molding with an H-shaped cross section, including a pair of plate-shaped plate members 41, 41 facing each other with a distance D1 between them and a mounting seat 42 connecting the pair of plate members 41, 41; and an ornamental item 30 (second cover body 30) that can be attached to the base material 20. The pair of plate members 41, 41 have a pair of plate-shaped protrusions 43, 43 integrally formed therewith that protrude in opposing directions from one end 41a, 41a of each plate member. The ornamental item 30 has a fixed portion 31 (boss 31) integrally formed therewith that can be fitted between the tips 43a, 43a of the pair of protrusions 43, 43. The fixed portion 31 is fitted between the tips 43a, 43a of the pair of protrusions 43, 43, and is fastened to the mounting seat 42 by a fastening member 45.

As such, the base material 20 has an H-shaped cross section, with a pair of plate-shaped protrusions 43 protruding toward each other from one end 41a of each pair of plate members 41. The fixed portion 31 of the decorative item 30 is fitted between the tips 43a (between the protruding surfaces 43a) of each protrusion 43 and can be fastened to the mounting seat 42. Therefore, even though the width Wd of the decorative item 30 is narrow compared to the distance D1 between the pair of plate members 41, this difference can be compensated for by the protrusion amount Pa of the pair of protrusions 43. When the vehicle cover device 10 is viewed from the front, the mounting seat 42 can be concealed by the respective protrusions 43. Furthermore, because the thickness Th of the pair of plate members can be made constant in the H-shaped cross section base material 20, there is no need to add unnecessary thickness (waste material) to the base material 20. During resin molding, the occurrence of "sink marks" on the design surface of the base material 20 can be prevented, thereby improving the quality of the vehicle cover device 10.

In addition, because the base material 20 has a pair of plate-shaped protrusions 43, 43 protruding in opposing directions from each end 41a, 41a of the H-shaped cross section, there is no need to make the mold (space-forming portion) extremely thin to form a narrow space (small space). This ensures the strength of the mounting seat 42 while also ensuring the durability of the resin molding die 100. Furthermore, there is no need to set the distance D1 between the pair of plate members 41, 41 large. This allows for a narrow decorative item 30, improving design freedom.

In this way, the quality of the vehicle cover device 10 is improved and the durability of the resin molding die 100 is ensured.

Furthermore, as shown in Figures 4 and 5, the fixed portion 31 has an integral locking portion 33 that protrudes from the side surface 31b (lower surface 31b) of the fixed portion 31. The mounting seat 42 has a retaining hole 53 (through hole 53) that can temporarily hold the locking portion 33 when the fixed portion 31 is fitted between the tips 43a, 43a of the pair of protrusions 43, 43. Therefore, the locking portion 33 of the fixed portion 31 can be temporarily held in the retaining hole 53 from the time the fixed portion 31 is fitted between the tips 43a, 43a of the pair of protrusions 43, 43 until it is completely fastened to the mounting seat 42. This simplifies the fastening process of fastening the fixed portion 31 to the mounting seat 42 with the fastening member 45.

Furthermore, as shown in Figures 2 to 4, the decorative item 30 is strip-shaped with a U-shaped cross section. One end 30c (upper end 30c) of the decorative item 30 has a fixed portion 31. The other end 30b (lower end 30b) of the decorative item 30 has a hooking piece 61. The base material 20 has a hooking portion 63 onto which the hooking piece 61 can be hooked. Therefore, to assemble the decorative item 30 to the base material 20, the hooking piece 61, which is located away from the fixed portion 31, is hooked onto the hooking portion 63, and the fixed portion 31 is fastened to the mounting seat 42 with the fastening member 45. Since there are fewer points where the fixed portion 31 needs to be fastened to the mounting seat 42, assembly is easier.

Furthermore, as shown in Figures 3, 9A, and 9B, the resin molding mold 100 is used to mold the base material 20 of a vehicle cover device 10, which includes a base material 20 made of an integrally molded resin product and an ornament 30 that can be attached to this base material 20.

As shown in Figures 4 and 5, the base material 20 is an integrally molded resin product and includes a fixing portion 40. This fixing portion 40 has an H-shaped cross section and is made up of a pair of plate-like members 41, 41 facing each other with a gap between them, and a mounting seat 42 connecting the pair of plate members 41, 41. Furthermore, the fixing portion 40 includes a pair of plate-like protrusions 43, 43 that protrude toward each other from one end 41a, 41a (front ends 41a, 41a) of each of the pair of plate members 41, 41, and a pair of spaces 46, 46 (see Figure 6) defined by the pair of plate members 41, 41, the mounting seat 42, and the pair of protrusions 43, 43.

As shown in Figures 4 and 7A, the fixing portion 40 further includes an extension plate 48 that extends from one end 42e (fourth end 42e) of the mounting seat 42 in a direction (the direction of arrow R1 shown in Figure 7A) along the plate surfaces 41b, 41b (inner surfaces 41b, 41b) of the pair of plate members 41, 41 and the seat surface 42a of the mounting seat 42 toward the pair of protrusions 43, 43.

4, 6, 9A, and 9B, the resin molding die 100 includes a slide die 130 that is movable in a direction along the plate surfaces 41b, 41b of the pair of plate members 41, 41 and the seat surface 42a of the mounting seat 42 (indicated by arrow R1 in FIG. 7A) to form a pair of spaces 46, 46 (see FIG. 6), a fixed die 110 that forms the remaining portion of the base material 20, and a movable die 120 that can be opened and closed relative to the fixed die 110. The fixed die 110 has partition surfaces 114b, 114c (first side surface 114b and second side surface 114c of the extension portion 114) that separate the pair of spaces 46, 46. The slide die 130 has a slide base 132 and a pair of space-forming protrusions 133, 133 that are provided on the slide base 132 and are used to form (mold) the pair of spaces 46, 46 (see FIG. 6). The pair of space-forming protrusions 133, 133 are positioned so that they can abut against the partition surfaces 114b, 114c of the fixed mold 110 when the movable mold 120 is clamped to the fixed mold 110.

In this way, the pair of spaces 46, 46 defined by the pair of plate members 41, 41, the mounting seat 42, and the pair of protrusions 43, 43 are formed by sliding and fitting the pair of space-forming protrusions 133, 133 of the slide mold 130 into the fixed mold 110. By skillfully combining the fixed mold 110, movable mold 120, and slide mold 130, the thickness Th of the pair of plate members 41, 41 on the H-shaped cross-section base material 20 can be made constant, eliminating the need to provide unnecessary thickness (waste material) on the base material 20. This prevents the occurrence of "sink marks" on the design surface of the base material 20 during resin molding, thereby improving the quality of the vehicle cover device 10.

In addition, a pair of spaces 46, 46 are molded (formed) by the fixed mold 110, movable mold 120, and sliding mold 130, with a pair of plate-shaped protrusions 43, 43 protruding in opposing directions from each end 41a, 41a of the H-shaped cross-section. Therefore, there is no need to make the mold (space-forming portion) extremely thin to form a narrow space (small space). This ensures the durability of the resin molding mold 100.

In this way, the quality of the vehicle cover device 10 is improved and the durability of the resin molding die 100 is ensured.

Furthermore, as shown in Figures 4 and 7A, the extension plate 48 of the base material 20 has a through hole 53 (retaining hole 53). Furthermore, as shown in Figures 9A and 9B, the slide mold 130 of the resin molding mold 100 has hole-forming protrusions 132b that are provided on the slide base 132 and are used to form the through hole 53 (see Figure 4). The pair of space-forming protrusions 133, 133 are set longer than the hole-forming protrusions 132b.

As described above, the pair of spaces 46, 46 are located directly below the seat surface 42a of the mounting seat 42 (projected onto the seat surface 42a). In contrast, the extension plate 48 is located at one end 42e in the direction along the seat surface 42a of the mounting seat 42. In other words, the positions of the extension plate 48 and through-hole 53 are offset in the direction along the seat surface 42a relative to the positions of the spaces 46, 46.

The slide mold 130 of the present invention makes clever use of this bias. In other words, the length of each space-forming protrusion 133, 133 relative to the slide base 132 is set longer than the hole-forming protrusion 132b. When the slide mold 130 is slid and fitted into the fixed mold 110, the space-forming protrusions 133, 133 are fitted into the fixed mold 110 before the hole-forming protrusion 132b.

As a result, the lengths of the space-forming protrusions 133, 133 can be appropriately set so that when the space-forming protrusions 133, 133 slide to the position for forming the spaces 46, 46, the hole-forming protrusion 132b finishes sliding to the position for forming the through-hole 53. Therefore, a single slide mold 130 is sufficient to form the spaces 46, 46 and the through-hole 53. This simplifies the configuration of the resin molding mold 100.

It should be noted that the present invention is not limited to the examples provided that the functions and effects of the present invention are achieved.
For example, the vehicle cover device 10 is not limited to a configuration that covers the front portion of the vehicle body, and may be configured to cover other portions. For example, the vehicle cover device 10 can be applied to a configuration that covers the entire exterior of the vehicle body or the interior of the vehicle body (including the passenger compartment).
Furthermore, although the vehicle cover device 10 has been illustrated as being provided on a passenger car, it can also be applied to vehicles other than passenger cars and is not limited to these types.

The vehicle cover device 10 of the present invention is suitable for installation in the front of a passenger vehicle.

10 Vehicle cover device 20 Base material (first cover body, front grille)
30 Decorative parts (second cover body, garnish)
30b: the other end (lower end) of the ornament
30c One end of the ornament (top end)
31 Fixed part (boss)
33 Locking portion 41 Plate member 41a One end of plate member 41b Plate surface of plate member 42 Mounting seat 42a Seat surface of mounting seat 42e One end (fourth end) of mounting seat
43 Protrusion 43a Tip of protrusion 45 Fastening member 46 Space 48 Extension plate 53 Retaining hole (through hole)
61 Hook piece 63 Hook stopper portion 100 Resin molding mold 110 Fixed mold 114b Partition surface (first side surface of extension portion)
114c Partition surface (second side of extension part)
120 Movable mold 130 Slide mold 132 Slide base 132b Hole forming protrusion 133 Space forming protrusion D1 Distance

Claims (3)

a base material made of an integrally molded resin product including a fixing portion having an H-shaped cross section, the fixing portion being made up of a pair of plate-shaped plate members facing each other with a gap therebetween and a mounting seat connecting the pair of plate members;
an ornament that can be attached to the fixing part,
The pair of plate members integrally have a pair of plate-shaped protrusions that protrude from one end of each plate member in directions facing each other,
the decorative article has an integral fixed portion that can be fitted between the tips of the pair of protruding portions,
The fixed portion is fitted between the tip ends of the pair of protrusions and fastened to the mounting seat by a fastening member. the fixed portion integrally includes a locking portion protruding from a side surface of the fixed portion,
The vehicle cover device according to claim 1 , wherein the mounting seat has a retaining hole capable of temporarily retaining the engaging portion in a state in which the fixed portion is fitted between the tip ends of the pair of protrusions. The decorative item has a belt-like shape with a U-shaped cross section,
One end of the decorative item has the fixed portion,
The other end of the ornament has a hook piece,
The vehicle cover device according to claim 1 , wherein the base member has a hook portion on which the hook piece can be hooked.