JP2012188010A - Clip mounting seat and interior material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clip mounting seat having adequate strength attained even when a material introduction part is eliminated.SOLUTION: The clip mounting seat 20 is provided with: a head part 30 in which the clip 200 can be mounted between the head part 30 and a step part 13 while forming a space SP1 in which the end part (205) of the clip 200 can be inserted; and first and second wall parts 40, 50 connecting from an erected part 12 and the step part 13 to the head part 30 across the space SP1 and supporting the head part 30. An opening OP1 connected to the space SP1 in which the end part (205) of the clilp 200 can be inserted is formed between a base part 10 and the head part 30 in an ordinary part 11 side and between the first wall part 40 and the second wall part 50. A swelled part 61 swelled to the vehicle outside is formed in the edge part 30a along the opening OP1 in the head part 30.

Description

  The present invention relates to a clip mounting seat to which a clip for fixing to a vehicle body can be attached, and an interior material having the clip mounting seat.

  In automobiles where the vehicle body is formed of steel plate panels, the interior of the vehicle is decorated by covering the steel plate with various interior materials molded from resin molding materials, soundproofing is given to the interior of the vehicle, and safety in the vehicle interior. Has been increased. For example, a door trim interior material is installed on the passenger compartment side of the door panel. A clip attachment portion for attaching a clip for fixing to the vehicle body is provided on the back surface of the door trim interior material.

In Patent Document 1, a leg portion of a clip bracket is supported on the back surface of the trim body between a groove formed on the surface of the trim body and a terminal of the trim body, and the trim body is attached to the door panel by the clip bracket. The mounting structure of the automobile door trim to be attached to is described. An insertion hole into which a clip for attaching the door panel to the inner panel is inserted is formed in the head of the clip bracket.
Patent Document 2 discloses a clip mounting seat including first and second wall portions that support the head.

JP 2000-85355 A JP 2008-174185 A

In the technique described in Patent Document 1, the clip bracket is supported on the back surface of the trim body by welding the lower end of the leg portion to the back surface of the trim body. Therefore, it is necessary to weld the clip bracket to the trim body.
In addition, the clip attachment part which has moderate intensity | strength and a favorable external appearance cannot be formed only by injection-molding a clip attachment part integrally with the base of an interior material. This is because if the clip mounting part is thickened, so-called sink marks are formed on the surface side of the base due to the cooling delay of the resin molding material, the resin molding material is wasted correspondingly, and the interior material is heavy accordingly. This is because the impact absorbability of the clip mounting portion having a function of absorbing impact load is reduced, or it is necessary to change the shape of the clip. On the other hand, if the clip mounting part is made thin, the flow of the resin molding material into the clip mounting part will be insufficient, resulting in lack of thickness in the clip mounting part, or clip mounting due to the weld line generated at the position where the clip is attached to the clip mounting part This is because the part is easily broken.

In order to form a clip mounting portion having both moderate strength and good appearance, the clip mounting seat described in Patent Document 2 is connected to the second wall portion from the base portion to the head portion from the second wall portion. A material introduction part is provided that promotes the flow of the resin molding material more than the flow of the resin molding material from the first wall to the head. Thereby, a weld line is prevented from being generated at a position where the clip is attached to the clip attachment seat, and cracking of the clip attachment portion is prevented.
However, in order to form the material introduction part, the mold opening direction and the drawing angle of the mold must be taken into account, the processing process is too complicated, and the material introduction part cannot be provided on the clip mounting seat. There is. For example, when the clip mounting seat is provided at the edge of the interior material that is raised toward the vehicle exterior, it is not easy to provide a material introduction portion that is sufficiently large to promote the flow of the resin molding material.

  In view of the above, the present invention has an object of providing a clip mounting seat that can obtain an appropriate strength even without a material introduction portion.

In order to achieve the above object, the present invention is formed integrally with a base portion of an interior material having a stepped portion that rises to the outside of a vehicle via a rising portion that rises from a general portion at an edge, and is fixed to a vehicle body. A clip mounting seat to which a clip can be attached,
A head to which the clip can be attached while forming a space in which an end of the clip can be inserted between the step and the step;
The first and second wall portions that connect to the head portion from the upright portion and the stepped portion across the space and support the head portion, and
Between the general part side of the base part and the head part, and between the first wall part and the second wall part, there is an opening connected to a space in which an end of the clip can be inserted. Formed,
In the head portion, a bulging portion that bulges outward from the vehicle is formed at an edge portion along the opening.
Moreover, the interior material of this invention has the aspect by which the said base and the said clip attachment seat were shape | molded integrally.

  The first and second wall portions of the clip mounting seat are connected from the standing portion and the step portion to the head portion, and between the first wall portion and the second wall portion on the side of the general portion lower than the step portion. An opening is formed in the. In the head, the edge on the side of the general part along the opening is not adjacent to the opening and the edge on the step side connecting the first wall part and the second wall part without the bulging part. There is a tendency that the strength is weaker than the part. Since the clip mounting seat is formed with a bulging portion toward the vehicle outer side at the edge of the head on the general portion side, the overall strength can be made moderate. Therefore, this aspect can provide a clip mounting seat that can obtain an appropriate strength even without a material introduction portion.

Furthermore, the present invention is a clip mounting seat in which a resin molding material is injected into a molding die from a portion for molding a base portion of an interior material and is integrally molded with the base portion, and a clip for fixing to a vehicle body can be attached. And
A head to which the clip can be attached while forming a space in which an end of the clip can be inserted between the base and the base;
A first and a second wall part connected to the head part from the base part and supporting the head part across the space;
Between the base part and the head part, and between the first wall part and the second wall part, an opening connected to a space into which an end of the clip can be inserted is formed,
In the head portion, a bulging portion is formed at the edge portion along the opening so as to cross a weld line generated in the head portion and bulge to the opposite side of the space.

  In the head portion of the clip mounting seat, the edge portion along the opening tends to be weakened by a weld line generated in the head portion if the bulging portion is not provided. Since this clip mounting seat is formed with a bulging portion that intersects with a weld line generated at the head at the edge of the head, the overall strength can be made moderate. Therefore, this aspect can also provide a clip mounting seat that can obtain an appropriate strength without the material introduction portion.

  In addition, the aspect mentioned above is applicable to the formation method of a clip attachment seat, the manufacturing method of interior material, etc. with the aspect of a dependent claim.

According to the invention concerning Claim 1 and Claim 7, even if there is no material introducing | transducing part, the clip attachment seat of moderate intensity | strength can be provided.
In the invention which concerns on Claim 2, the clip mounting seat of moderate intensity | strength can be provided further.
In the invention which concerns on Claim 3, the clip attachment seat of the moderate intensity | strength by which the hole for a clip end part locking hole was formed in the head can be provided.
In the invention which concerns on Claim 4, even if the weld line has arisen in the head, the clip attachment seat of moderate intensity | strength can be provided.

In the invention which concerns on Claim 5, the clip mounting seat of the moderate intensity | strength by which the 1st and 2nd wall part is arrange | positioned in the vicinity of the recessed part for pockets can be provided.
In the invention which concerns on Claim 6, the clip attachment seat of the moderate intensity | strength provided in the interior material reduced in weight can be provided.
In the invention which concerns on Claim 8, even if there is no material introduction part, the interior material which has a clip mounting seat of moderate intensity | strength can be provided.

It is a side view which shows an example of an interior material seeing from the vehicle outer side. FIG. 2 is a vertical sectional view showing the interior material 100 shown in FIG. 1 in a cross-sectional view at a position A1 in FIG. It is a perspective view which shows an example of a clip attachment seat. FIG. 4 is a perspective view showing the clip mounting seat 20 shown in FIG. 3 as seen from another direction. It is a perspective view which shows an example of a clip. It is a side view which shows the clip 200 shown in FIG. 5 seeing from a side surface. FIG. 4 is a cross-sectional view showing the clip mounting seat 20 shown in FIG. 3 in cross-section at the position A2 in FIG. FIG. 4 is a partial sectional view showing the clip mounting seat 20 shown in FIG. 3 as viewed from the position A3 in FIG. It is principal part sectional drawing which shows an example of a mode that an interior material is manufactured using a shaping | molding die. It is principal part sectional drawing which shows an example of a mode that an interior material is manufactured using a shaping | molding die. It is principal part sectional drawing which shows an example of the cross-sectional structure of the manufactured interior material.

(1) Structure of interior material having clip mounting seat:
FIG. 1 shows the appearance of an interior material 100 having a clip mounting seat 20 according to an embodiment of the present invention as seen from the vehicle exterior side. The interior material provided with the clip mounting seat 20 may be an interior material such as a ceiling interior material or a pillar garnish, although a door trim is suitable. The door trim may be a driver door trim, a passenger door trim, or a rear seat door trim. In the present embodiment, the interior material 100 will be described as a door trim.

  The door trim (100) is attached and fixed by a clip 200 to a door panel constituting a part of the vehicle body. The door trim (100) is manufactured by at least integrally forming a thin plate-like base 10 and a clip mounting seat 20 to which a clip 200 can be attached. Specifically, as shown in FIGS. 9 and 10, a resin molding material M1 is injected into a molding die 300 from a portion where the base 10 is molded, and the interior material 100 is molded into a required shape. The thickness of the base 10 is, for example, about 2.0 to 6.0 mm, and more preferably 3.0 to 4.0 mm. In order to improve the design of the base 10 on the passenger compartment side surface 10a, a drawn pattern may be appropriately transferred or a skin material may be affixed. Further, accessories such as an ornament, a lighting device, an accessory case, a pocket, and an assist grip are appropriately added to the surface 10a on the passenger compartment side. Clip mounting seats 20 and 21 and a boss 14 are formed on the surface 10b on the vehicle exterior side of the base 10, and various cushioning materials, impact absorbing materials, soundproofing materials, and the like are partially installed as appropriate. As shown in FIGS. 1 and 2, the door trim (100) has a pocket member (pocket portion) 90 attached to the outer surface 10b of the pocket general portion 11a to form a pocket in which small items can be taken in and out of the pocket opening 11b. Has been. A passenger in the passenger compartment can use this pocket as an accessory case.

As shown in FIGS. 1 to 4, 7, 8, and the like, the base portion 10 of the door trim (100) has a step portion 13 that rises to the vehicle outer side via an upright portion 12 that rises from the general portion 11 at the edge portion 10 c. . Here, FIG. 8 shows the clip mounting seat 20 and the like by cutting the general portion 11.
The general portion 11 is a portion that occupies most of the base portion 10 and is a portion that is on the bottom side of the concave portion of the base portion 10 on the premise of having unevenness corresponding to the vehicle type when the vehicle outer side is turned up. The general portion 11 is provided with the above-described pocket general portion 11a, the pocket opening 11b that is the upper side of the pocket general portion 11a, the boss 14, the clip mounting seat 21 apart from the standing portion 12, and the like. After the base 10 and the clip mounting seat 20 are injection-molded, the pocket member 90 is attached and fixed to the surface of the pocket general portion 11a on the vehicle outer side.

  The standing portion 12 is provided outside the general portion 11 and is a portion that rises from the general portion 11. The standing part 12 may be provided over the entire circumference of the general part 11, or may be provided only on a part of the entire circumference of the general part 11. Either case is included in the present invention. The boundary portion between the general portion 11 and the standing portion 12 may be a curved surface shape such as a chamfered shape. The angle formed by the general portion 11 and the upright portion 12 may be 90 °, but may be about 60 to 75 °, and further about 45 to 89 °. Here, when the general part 11 and the standing part 12 are uneven, for example, the angle formed by the substantially flat part of the general part 11 and the substantially flat part of the standing part 12 is the angle formed by the general part 11 and the standing part 12. do it.

The step portion 13 is provided on the outside of the upright portion 12 and is a portion that rises from the general portion 11 to the vehicle outer side. The step portion 13 may be provided over the entire circumference of the base portion 10, or may be provided only on a part of the entire circumference of the base portion 10. Either case is included in the present invention. The boundary portion between the upright portion 12 and the stepped portion 13 may have a curved shape such as a chamfered shape. The angle formed by the upright portion 12 and the stepped portion 13 may be 90 °, but may be about 60 to 75 °, and further about 45 to 89 °. Here, when the standing part 12 and the step part 13 are uneven, for example, the angle formed by the substantially flat part of the standing part 12 and the substantially flat part of the step part 13 is the angle formed by the standing part 12 and the step part 13. Good. Moreover, although the angle which the general part 11 and the step part 13 make may be 0 degree, about 15-30 degrees and also about 1-45 degrees may be sufficient.
The clip mounting seat 20 shown in FIGS. 3 and 4 is provided across the general part 11, the standing part 12, and the step part 13.

The clip mounting seat 20 shown in FIGS. 3, 4, etc. is molded integrally with the base 10 by injecting the resin molding material M <b> 1 into the molding die 300 from the part where the base 10 of the interior material 100 is molded, and the clip 200 is attached. It is possible. The clip mounting seat 20 generally has an arrow shape including a head 30 to which the clip 200 can be attached, and first and second wall portions 40 and 50 that support the head 30. The back wall portion 70 is further provided on the clip mounting seat. In order to prevent unevenness called sink marks on the surface side of the base due to the cooling delay of the resin molding material, each part of the clip mounting seat cannot be thickened, for example, 2.0 mm or less thinner than the thickness of the base More preferably, the thickness is 0.5 to 1.8 mm, or about 30 to 50% of the thickness of the base.
The head 30 has a locking hole 36 for inserting the lower flange (end portion) 205 of the clip 200 from the boundary portion 30 c with the second wall portion 50 and penetrating and locking the lower flange 205 of the clip. A space SP1 into which the lower flange 205 of the clip can be inserted is formed between the step portion 13 and the clip 200 can be attached at a predetermined attachment position L1.

As shown in FIGS. 5 and 6, the clip 200 for fixing the interior material 100 to the vehicle body is, in order from the door panel side to the interior material side, a clip head 201 having elasticity, a dish-like seal piece 202, and a disc shape. The upper flange 203, the columnar leg portion 204, and the disc-like lower flange 205 are formed. The clip 200 is made of, for example, a resin and is formed by molding a resin molding material such as a thermoplastic resin. When the lower flange 205 is inserted into the locking hole 36 from the insertion opening 57 of the clip mounting seat, the leg portions 204 penetrate the locking hole 36 while both the flanges 203 and 205 sandwich the head 30. The clip 200 is attached to the clip mounting seat 20.
When a plurality of the above-described clips are attached to the back surface (10b) of the base portion and attached to mounting holes formed in the opposing door panel, the door trim (100) is attached to the door panel. Fixed. When the door panel has an outer panel and an inner panel, an attachment hole is formed in the inner panel, and a clip is attached to the attachment hole.

  As a molding apparatus suitable for molding the interior material, a known injection molding machine can be used, and the form (solid type, horizontal type) and the drive system (hydraulic type, electric type, etc.) are not limited. Also, when molding the base by foaming to reduce the weight of the interior material, for example, foam injection having a gas injection device that injects the inert gas into the resin molding material while controlling the injection pressure of the inert gas to a constant pressure. A molding machine may be used.

FIG. 9 shows a vertical cross section of a main part of a mold 300 provided in the injection molding machine. The main mold 300 includes a pair of molds 310 and 320 that can approach and separate from each other, and a slide mold 330 for molding the clip mounting seat 20. The main mold 300 is a mold for molding a foam injection molded body by expanding a cavity CA1 filled with a resin molding material containing a foaming agent in the middle. Such molding is also called core back molding. The main mold 300 is a mold in which the lower mold 310 is fixed, the upper mold 320 is a mold capable of reciprocating in the vertical direction, and the slide mold is reciprocated in a predetermined direction shifted from the vertical direction to the horizontal direction. It is a movable mold. Of course, the mold may be such that both the upper mold and the lower mold can be reciprocated in the vertical direction, or only the lower mold can be reciprocated in the vertical direction, and can be moved toward and away from each other in the horizontal direction. It may have a pair of molds.
The lower mold 310 is provided with a gate 312 for injecting the resin molding material M1 into the cavity CA1. The gate 312 is formed at a portion where the base 10 is molded, and is provided at a position corresponding to the gate position 16 of the base 10 shown in FIG.
The slide mold 330 is reciprocated in the above direction by a slide type drive mechanism 332 penetrating the lower mold 310.

The resin constituting the resin molding material M1 is preferably a thermoplastic resin (a kind of synthetic resin) from the viewpoint of obtaining characteristics such as good moldability and good shape retention after molding, and the synthetic resin has a rubber component and the like. A modified resin or the like in which an elastomeric property is enhanced by blending a soft component may be used.
As the thermoplastic resin, an olefin resin, an olefin thermoplastic elastomer, or the like can be used. Either a homopolymer or a copolymer obtained by copolymerizing two or more types of monomers, an olefin and an unsaturated carboxylic acid can be used. Copolymerized copolymers or combinations thereof may be used. Specifically, polypropylene, polyethylene, acrylonitrile butadiene styrene resin (ABS resin), polyethylene terephthalate (PET), polyamide, polystyrene, combinations thereof, these resins For example, a modified resin in which a rubber component is blended can be used. The melting point of the meltable resin molding material is, for example, 100 to 300 ° C.
When molding an interior material having a large area and a thin base, a resin having a high melt index (for example, MI of 70 g / 10 min or more) is used to improve the flow of the resin molding material in the cavity formed by the mold. Used.

The foaming agent contained in the resin molding material M1 includes a physical foaming agent such as a gas inert gas or a volatile organic compound at a normal temperature of 1 atm, a chemical foaming agent that decomposes or reacts when heated to generate gas, and a combination thereof. Can be used. As the inert gas, carbon dioxide, nitrogen, argon, helium, neon, a combination thereof, or the like can be used. As the volatile organic compound, a volatile foaming agent that generates hydrocarbons such as butane and pentane can be used. As the chemical foaming agent, an inorganic foaming agent that generates carbon dioxide gas such as ammonium carbonate or sodium hydrogen carbonate, an organic foaming agent that generates organic compound gas such as polycarboxylic acid or azo compound, and the like may be used. it can.
When the inert gas is injected into the resin molding material, the pressure of the inert gas to be injected is, for example, 0.5 to 20 MPa.

  The resin molding material M1 may be composed of only a resin and a foaming agent, but an additive may be included in the resin molding material M1. As additives, fillers such as talc, nucleating agents, pigments, lubricants, antioxidants, heat stabilizers, ultraviolet absorbers, antistatic agents, combinations thereof, and the like can be used. The blending ratio of each material in the resin molding material can be, for example, 50% by weight or more of resin and less than 50% by weight of additive.

  The clip mounting seat 20 is molded by injecting a resin molding material M1 into a cavity CA1 formed by a molding die 300 having a slide die 330. After molding, the slide mold 330 is retracted from the step portion 13 toward the general portion 11. Therefore, as shown in FIGS. 3 and 4 and the like, between the first wall portion 40 and the second wall portion 50 between the base portion 10 and the head portion 30 and the first wall portion 40, the clip An opening OP1 connected to the space SP1 into which the lower flange 205 can be inserted is formed. Of course, the slide mold 330 is shaped to match the opening OP1, and is a mold that advances between the base portion 10 and the head portion 30 and between the wall portions 40, 50 so as to advance and retreat into the space SP1.

  The head portion 30 of the clip mounting seat 20 is formed in a plate shape having a substantially flat surface except for the locking hole 36 when viewed from the outside of the vehicle and having a substantially rectangular outer shape, and is spaced from the step portion 13 by a predetermined distance. It is said that the top plate is arranged. The head portion 30 is disposed substantially parallel to the back surface (10b) of the general portion 11 and the step portion 13, but is not necessarily disposed in this manner, and the head portion is substantially parallel to the vehicle body panel to which the head is attached. Often to do. The locking hole 36 is formed in a substantially circular shape at the central portion of the head portion 30, and a portion 36 b that connects the circular portion 36 a to the insertion port 57 in the boundary portion 30 c with the second wall portion 50 is provided. Of course, the locking hole may be formed in a substantially oval shape at the head. The diameter of the circular portion 36a is larger than the diameter of the clip leg portion 204 and smaller than the diameters of both the flanges 203 and 205 of the clip in consideration of dimensional variations due to processing accuracy of parts, heat shrinkage, and the like. . In addition, the width of the portion 36 b connected from the circular portion to the insertion port 57 is made smaller than the diameter of the circular portion 36 a in a range larger than the diameter of the leg portion 204. The insertion port 57 is provided on the vehicle compartment side from the boundary portion 30c and has a width larger than the diameter of the lower flange 205 of the clip.

In addition, the head portion 30 is formed with a pair of convex portions 34, 34 that are convex from the corner portion in contact with the boundary portion 30c toward the vehicle exterior direction DR1. The main projections 34, 34 are formed in a hemispherical shape from the outer surface of the head 30, and have a function of preventing the clip 200 from coming off from the clip mounting seat 20. The height of the convex portions 34, 34 is, for example, 0.5 to 2.0 mm. When the lower flange 205 of the clip is inserted into the locking hole 36 from the insertion port 57, the upper flange 203 gets over the convex portions 34, 34 after elastic deformation, and the lower flange side of the clip 200 is locked to the head 30. . Thereafter, the protrusions 34 and 34 are prevented from coming off, and the lower flange side of the clip 200 does not easily fall off the head 30.
Furthermore, a bulging portion 61 that bulges toward the vehicle exterior side (vehicle exterior direction DR1), which is the direction opposite to the space SP1, is formed on the edge 30a on the general portion side along the opening OP1 in the head 30.

The wall portions 40 and 50 are formed in a plate shape whose outer shape is a substantially square shape, and are standing walls that continuously hang down from the facing edge portions 30 b and 30 c toward the base portion 10 in the head 30. That is, the wall portions 40 and 50 are connected from the base portion 10 to the head portion 30 with the space SP1 interposed therebetween, and support the head portion 30 from the step portion 13 at a predetermined height. In order to improve the strength of the clip mounting seat, the distance between the wall portions 40 and 50 is narrower on the head side than on the base side.
Since the clip mounting seat 20 is disposed near the base edge portion 10c, the wall portions 40 and 50 are provided from the upright portion 12 to the step portion 13 with the wall surfaces oriented in the inner and outer directions of the interior material 100. . Therefore, the wall portions 40 and 50 are connected to the head portion 30 from the standing portion 12 and the step portion 13 with the space SP1 interposed therebetween, and support the head portion 30. That is, it can be said that the wall portions 40 and 50 extend from the standing portion 12 and the step portion 13 toward the head portion 30 and also from the standing portion 12 toward the general portion 11. The wall portions 40 and 50 shown in FIGS. 3 and 4 are also connected to the general portion 11. Accordingly, it can be said that the wall portions 40 and 50 extend from the general portion 11 toward the head portion 30.
Further, since the clip mounting seat 20 is disposed near the pocket member 90 provided in the general portion 11, the wall portions 40 and 50 are disposed in the vicinity of the pocket member 90.

The second wall 50 is formed with an opening (insertion port 57) that is recessed toward the passenger compartment side in the vicinity of the boundary portion 30c with the head. As described above, the insertion port 57 can pass through the lower flange 205 when the clip 200 is inserted.
Further, a second bulging portion 62 that is connected to the bulging portion 61 and bulges in the direction DR3 opposite to the space SP1 is formed on the edge 50a on the general portion side along the opening OP1 in the second wall portion 50. ing.

The back wall portion 70 is formed in a plate shape whose outer shape is a substantially square shape, and is a standing wall that continuously hangs down from the edge portion 30d facing the opening OP1 toward the step portion 13 in the head portion 30. That is, the back wall 70 is connected from the step 13 to the head 30 and supports the head 30 at a predetermined height from the step 13. Moreover, in order to improve the intensity | strength of the clip mounting seat 20, as shown in FIG. 7, you may provide the connection rib 71 connected from the back wall part 70 to the standing part 13a of the base edge part 10c. The back wall portion 70 and the connecting rib 71 are provided to prevent the wall portions 40 and 50 from falling in the left-right direction in FIG. 8 due to an external force, and can be omitted when the strength of the clip mounting seat is secured.
In addition, since a slide type | mold is inserted in the site | part on the opposite side to the back wall part 70 on both sides of space SP1, a wall part is not provided.

  By the way, when a resin molding material is injected from a part for molding the base portion of the interior material into a mold and a clip mounting seat is molded integrally with the base portion, the clip mounting seat is molded from the portion of the cavity where the base portion is molded. The resin molding material flows into the part to be done. Here, each portion of the clip mounting seat is made thin to some extent so as not to cause unevenness called sink marks on the surface side of the base portion.

When molding the interior material, the path of the resin molding material that flows in a molten state (liquid state) includes a first path that flows from the base 10 to the head 30 via the first wall 40, and a path from the base 10 to the second wall. There is a second path that flows to the head 30 via the part 50. Accordingly, since the resin molding material of both paths collides at a substantially intermediate position of the head 30 and the temperature of the resin molding material is also lowered, the weld line WL1 connected to the locking hole 36 is generated. That is, since the weld line WL1 is generated in the clip mounting seat 20 at the position where the clip is mounted, if there is no bulging portion 61, the strength of the clip mounting seat 20 tends to decrease at this portion (WL1) and easily break. . If the clip mounting seat is thin, the resin molding material does not flow into the clip mounting portion in the cavity. If the bulging portion 61 is not provided, the strength may decrease at this portion.
Here, the weld line applied to the present invention is not limited to a visually visible weld line, a weld line detected by an electromagnetic wave inspection such as an X-ray inspection, a weld line obtained by computer analysis (CA), and the like. Is included.

  If the material introduction part as described in JP 2008-174185 A can be made large enough to promote the flow of the resin molding material, it may be provided to give the clip mounting seat an appropriate strength. Good. However, when the clip mounting seat is provided over the stepped portion that rises toward the outside of the vehicle, there is no space for adding a material introducing portion of a size sufficient to promote the flow of the resin molding material to the clip mounting seat. Moreover, if an attempt is made to provide a material introducing portion that is as large as possible, the mold structure and processing steps become complicated.

  Further, as a countermeasure that is normally considered for the insufficient strength of the clip mounting seat due to the weld line, it is conceivable to set the gate position (16) near the clip mounting seat. However, as shown in FIGS. 1 and 2, when the clip mounting seat 20 is disposed in the vicinity of the pocket of the door trim (100), the pocket general portion 11a is injection-molded as an inner wall on the vehicle compartment side. It becomes a part which touches a passenger | crew's hand through a skin material. If the injection molding gate 16 is disposed in the pocket general portion 11a, the surface of the foamed layer in the cell state is exposed at the gate cut portion, and the touch is not good and the quality is deteriorated. For this reason, in the clip mounting seat 20 disposed in the vicinity of the pocket general portion 11a, the gate position (16) cannot be set nearby, for example, resin flowing from the left and right gate positions 16a, 16b. The molding material collides with the clip mounting seat 20, and the weld line WL1 is generated.

Therefore, the clip mounting seat 20 has a bulging portion 61 formed on the edge portion 30 a on the general portion side of the head portion 30.
As shown in FIG. 7 and the like, the wall portions 40 and 50 of the clip mounting seat 20 are connected to the head portion 30 from the standing portion 12 and the step portion 13, and the wall portion 40 on the side of the general portion 11 lower than the step portion 13. , 50, an opening OP1 is formed. In the head 30, the edge portion 30a on the general portion 11 side along the opening OP1 is not adjacent to the opening OP1 and is connected to the wall portions 40 and 50 by the weld line WL1 if there is no bulging portion 61. The strength tends to be weaker than that of the side edge 30d. Since the clip mounting seat 20 is formed with a bulging portion 61 bulging in the vehicle exterior direction DR1 on the edge 30a on the general portion side of the head 30, the opening OP1 side of the head 30 where the weld line WL1 occurs is reinforced. It is possible to moderate the overall strength. Further, since the bulging portion 61 bulges from the head portion 30 in the vehicle exterior direction DR1 instead of the vehicle interior direction DR2, the bulging portion 61 can be easily molded by using a slide mold.

The bulging portion 61 extends from the edge portion 30a on the general portion side adjacent to the opening OP1 in the head portion 30 to the outside of the vehicle. The extending direction of the bulging portion 61 is a vehicle outward direction DR1 that is substantially perpendicular to the surface of the head 30. The bulging portion 61 has a long shape with the longitudinal direction DR5 directed in the direction connecting the wall portions 40 and 50, and is formed along the opening OP1. Thereby, the bulging part 61 is substantially orthogonal to the weld line WL1 when it occurs in the direction (internal / external direction DR4 of the interior material) connecting the general part 11 and the step part 13 at the approximate center of the head 30. In this case, the weld line WL1 passes through substantially the center of the bulging portion when a long bulging portion is formed over almost the entire general portion side edge 30a of the head. Of course, the long bulged part may be formed over the entire general part side edge 30a of the head, or may be formed only on a part of the general part side edge 30a.
Note that the angle formed between the elongated bulging portion 61 and the weld line WL1 that are substantially orthogonal to each other includes a range of 45 to 135 ° (more preferably 60 to 120 °, and still more preferably 75 to 105 °).

  Since the bulging portion 61 is formed along the edge portion 30a of the head portion, most of the surface on the vehicle outer side of the head portion 30 can be a smooth surface, and the end portion of the clip can be used as a locking hole. It is difficult to obstruct when inserting into 36. Since the bulging portion 61 has a shape that bulges substantially perpendicularly from the surface of the head 30, a special additional processing step or a slide structure of the mold is not required to form the bulging portion 61, and clip mounting It is difficult to be constrained by the seat location and the surrounding shape.

The bulging portion 61 has a thickness (W) of about 0.5 to 3.0 mm (more preferably about 1.0 to 2.0 mm) as the length in the inner and outer direction DR4 of the interior material, and the length in the vehicle outer direction DR1. The height (referred to as H) is about 0.5 to 2.0 mm (more preferably about 0.7 to 1.3 mm), and the length in the longitudinal direction DR5 (referred to as L) is 10.0 to 30. It can be about 0 mm (more preferably about 15.0 to 25.0 mm). When the thickness W, the height H, and the length L are within the above ranges, the strength of the clip mounting seat can be made more preferable while avoiding interference with the clip.
Although the shape of the bulging portion 61 is preferably a substantially rectangular parallelepiped as shown in FIGS. 3 and 4 and the like, it is preferable because the head 30 can be held substantially evenly. You can also do. Further, the long bulging portion 61 can be bent or curved.

Further, a second bulging portion that is connected to the bulging portion 61 and bulges in the direction DR3 opposite to the space SP1 at an edge portion 50a that is adjacent to the opening OP1 in the second wall portion 50 and connects the base portion 10 and the head portion 30. 62 can also be formed. Since the insertion opening 57 is formed in the second wall 50, the strength of the clip mounting seat 20 on the second wall 50 side tends to be lower than the strength on the first wall 40 side. is there. Since the second bulging portion 62 is formed on the side having the insertion port 57 of the clip mounting seat 20, the second bulging portion 62 reinforces the second wall portion 50 side having the insertion port 57. Further, since the second bulging portion 62 bulges from the head 30 not in the vehicle interior direction DR2 but in the vehicle exterior direction DR1, the second bulging portion 62 can be injection-molded using a slide mold. Easy.
The second bulging portion 62 extending short in the direction DR3 opposite to the space SP1 has a long shape along the general portion side edge 50a of the second wall portion, and is formed along the opening OP1. . Of course, the elongate second bulging portion may be formed over the entire general portion side edge portion of the wall portion, or may be formed only on a part of the general portion side edge portion.

The second bulging portion 62 may have the same thickness in the direction connecting the base 10 and the head 30, but may be thicker on the head 30 side and thinner on the base 10 side. The second bulging portion 62 shown in FIG. 8 and the like is gradually thinned from the head 30 side toward the base 10 side so as to be interrupted at a midpoint of the wall portion 50 without extending to the base portion 10. The second bulging portion 62 has a thickness that is the length in the inner and outer direction DR4 of the interior material of about 0.5 to 3.0 mm, and a height that is the length of the opposite direction DR3 of the space is about 0.5 to 2.0 mm. The length in the longitudinal direction can be about 10.0 to 50.0 mm. The shape of the second bulging portion 62 can be partially tapered or the trapezoidal cross section.
The second bulging portion 62 is coupled to the bulging portion 61 on the head 30 side. Thereby, the overall strength of the clip mounting seat 20 in which the locking hole 36 of the clip end (205) is formed in the head 30 is efficiently reinforced, and the strength of the clip mounting seat 20 is made more appropriate. Can do.

(2) Manufacturing method, operation, and effect of interior material having clip mounting seat:
Next, with reference to FIGS. 9-11, each process of the manufacturing method of this interior material made into the foam injection molding is demonstrated. Note that a thermoplastic resin is used as the resin constituting the resin molding material.
First, the slide mold 330 is accommodated in a predetermined position of the lower mold 310 by the slide mold drive mechanism 332, the pair of molds 310 and 320 in the mold open state are closed, and the cavity CA1 is formed. As shown in the upper part of FIG. 9, the upper mold 320 that is a movable mold is at the lowermost predetermined proximity position L11, and the vertical thickness (d1) of the cavity CA1 is larger than the thickness of the base 10 after molding. It has been made smaller. Further, the slide mold 330 is in a state of being advanced into the clip mounting seat. Therefore, the cavity CA1 is formed by a pair of molds 310 and 320 that are close to the advanced slide mold 330.

  Here, the resin molding material M1 containing the foaming agent is made into a high-temperature liquid having a melting point (MP) or higher, and the molding die 300 is set to a temperature lower than the melting point MP (for example, 30 to 80 ° C.). In addition, if a resin molding material is heated more than melting | fusing point and it is made into a molten state, it can be made a high temperature liquid state. For example, when a polypropylene having a melting point of 160 ° C. is used as the thermoplastic resin, the polypropylene can be melted by heating the resin molding material to about 170 to 230 ° C. In addition, a chemical foaming agent that generates a decomposition gas is mixed in the resin molding material in advance, or a physical foaming agent such as an inert gas is press-fitted with a press-fitting device added to the injection molding machine.

Next, the molten resin molding material M1 is injected and filled into the cavity CA1 from the gate 312 at an injection pressure of 100 to 200 MPa and a filling time of 0.5 to 5 seconds, for example (step 1). The gate 312 is disposed in the cavity CA1a corresponding to the base 10 and is not disposed in the cavity CA1b corresponding to the clip mounting seat 20. The injection pressure and the filling time vary mainly depending on the amount of the resin molding material to be injected, that is, the size of the interior material. The injected resin molding material moves from the portion of the base 10 (CA1a) to the portion of the clip mounting seat 20 (CA1b) in the cavity CA1, and wraps around the cavity CA1. Since each portion of the clip mounting seat is thin, the resin molding material tends to spread from the base portion (CA1a) in the cavity CA1 and flow into the clip mounting seat portion (CA1b) after filling the base portion. is there.
As described above, the resin molding material flowing from the wall portions 40 and 50 collides with the head portion 30. Therefore, as shown in FIGS. 3 and 4, the head 30 has a weld line connected to the edges 30 a and 30 d and the locking hole 36 so as to be parallel to the boundary portions 30 b and 30 c with the walls 40 and 50. WL1 is formed. Further, the resin molding material on the surface that is in contact with the molding die 300 having a temperature lower than the melting point of the resin molding material is solidified to start to form a skin layer. On the other hand, the resin molding material inside the skin layer maintains a molten state.

After a predetermined time has elapsed from the injection of the resin molding material, the pair of molds 310 and 320 are separated from each other to a predetermined separation position L12, and the volume of the cavity CA1 is expanded (step 2). At this time, the vertical thickness (d2) of the cavity CA1 is substantially the thickness of the base 10 after molding. Since the lower mold 310 shown in FIG. 9 is a fixed mold, the upper mold 320 moves upward by d2−d1. Then, the foaming agent in the resin molding material foams inside the skin layer, and a large number of micro bubbles are formed. As a result, as shown in the cross-sectional view of FIG. 11, in the base portion 10, a foam layer M2 having a large number of foam cells is formed between the skin layers M3 and M4 on the surface. Here, the thickness of the foam layer M2 is about 1.0 to 4.0 mm, and the thickness of the skin layers M3 and M4 is about 0.5 to 1.0 mm, respectively.
After a predetermined time elapses after the molds 310 and 320 are separated to the separation position L12, the molds 310 and 320 are mutually opened to the predetermined mold opening position L13 to open the cavity (step 3). FIG. 10 shows that the upper mold 320 has moved upward.

Thereafter, the slide mold 330 is advanced from the lower mold 310 by the slide mold drive mechanism 332 and retracted from the clip mounting seat (step 4). And if molded interior material 100 is taken out, a series of manufacturing cycles will be completed.
Thus, the interior material 100 is manufactured in which the resin molding material is injected into the cavity CA1, the pair of molds 310 and 320 are separated, and the clip mounting seat and the base are integrally molded. That is, the clip mounting seat 20 has a base portion having a foam layer M2 formed by injecting a resin molding material M1 containing a foaming agent into a cavity CA1 formed by the molding die 300 and expanding the cavity CA1a of the portion that becomes the base portion 10. 10 is formed integrally. As shown in FIG. 1, the trace of the gate 312 remains at the gate position 16 on the back surface (10b) of the formed base, and the slide mold is positioned at the position 18 of the slide mold 330 inserted into the clip mounting seat. Traces remain.

As shown in FIGS. 3 and 4, the clip mounting seat 20 formed by the manufacturing method described above has a general head 30 in which the weld line WL <b> 1 is generated along the inner and outer direction DR <b> 4 connecting the general portion 11 and the stepped portion 13. A bulging portion 61 to the outside of the vehicle that intersects the weld line WL1 is formed at the portion side edge portion 30a. By providing the bulging portion 61, a decrease in strength due to the weld line WL1 is suppressed. Therefore, even if the weld line WL1 occurs in the head 30, the strength of the entire clip mounting seat can be made moderate, and the occurrence of problems such as cracks in the head 30 can be minimized.
Moreover, since the said bulging part 61 is formed in the general part side edge part 30a along the opening OP1 formed in the side of the general part 11 lower than the step part 13, the clip mounting seat 20 where the weld line WL1 occurs , The strength of the general portion 11 side, which tends to be weaker than the strength of the step portion 13 side, is improved as compared with the step portion 13 side. Thereby, even if there is no material introduction part, the intensity | strength of the whole clip mounting seat can be made moderate. Further, since the second bulging portion 62 is formed on the general side edge portion 50a of the second wall portion 50 having the insertion port 57 so as to be connected to the bulging portion 61, the clip end portion is locked to the head. The overall strength of the clip mounting seat in which the holes are formed can be made moderate.

A clip mounting seat obtained by foaming and molding a resin molding material containing a foaming agent tends to have lower strength than a clip mounting seat obtained by molding with a resin molding material not containing a foaming agent. In particular, when the clip mounting seat is formed over the stepped portion that is raised to the outside of the vehicle, if there is no bulging portion as described above, the strength reduction due to the use of the foam material cannot be compensated, or it can be compensated greatly. Increase man-hours and costs. Therefore, the present technology exemplified by the clip mounting seat 20 is particularly suitable for application to a clip mounting seat obtained by foaming and molding a resin molding material. And since the manufactured interior material is made into a foaming molding, an interior material can be reduced in weight.
Of course, a clip mounting seat obtained by molding with a resin molding material not containing a foaming agent is also included in the present invention.

(3) Modification:
Various modifications can be considered for the present invention.
For example, even if a clip mounting seat having a bulging portion and a clip mounting seat having no bulging portion are mixed in the same interior material, the interior material is included in the present invention.
Although the head, the first wall, the second wall, and the back wall described above are preferably plate-shaped in terms of easy molding, the present invention even if the shape deviates from the plate shape. The basic effect of can be obtained. Moreover, the 1st wall part, the 2nd wall part, and the back wall part may be connected with the rib which reinforces a base.

As shown by a two-dot chain line in FIG. 8, the second bulging portion 63 may be formed on the general portion side edge portion 40 a of the first wall portion 40. The second bulging portion 63 may be connected to the bulging portion 61. In the case where the second bulging portion 63 is provided in the first wall portion 40, the second bulging portion 62 may or may not be provided in the second wall portion 50.
The first and second wall portions may not be connected to the general portion 11. In this case, a second bulge portion may be formed at an edge portion adjacent to the opening OP1 and connecting the upright portion 12 and the head portion 30 in at least one of the wall portions 40 and 50.

In addition, it is not essential to provide a back wall part and a 2nd swelling part in a clip attachment seat.
Of course, the clip mounting seat which does not have the constituent requirements according to the dependent claim but only the constituent requirements according to the independent claim, the forming method, the interior material, the manufacturing method, etc. An effect is obtained.

As described above, according to the present invention, according to various aspects, it is possible to provide a technique or the like that provides a clip mounting seat that can obtain an appropriate strength without a material introduction portion.
In addition, it is also possible to implement the present invention by mutually replacing the configurations disclosed in the above-described embodiments and modifications, and changing the combination. It is also possible to carry out the present invention by substituting each component disclosed in the above or changing the combination. Therefore, the present invention is not limited to the above-described embodiments and modifications, and includes configurations in which the configurations disclosed in the publicly known technology and the above-described embodiments and modifications are mutually replaced or combinations thereof are changed. It is.

DESCRIPTION OF SYMBOLS 10 ... Base part, 10a ... Vehicle compartment side surface, 10b ... Vehicle outer side surface, 10c ... Edge part,
11 ... General part, 11a ... Pocket general part, 11b ... Pocket opening,
12 ... Standing part, 13 ... Step part,
14 ... Boss, 16, 16a, 16b ... Gate position, 18 ... Slide type position,
20 ... Clip mounting seat,
30 ... Head, 30a, 30d ... Edge, 30b, 30c ... Boundary part, 36 ... Hole for locking,
40 ... first wall, 40a ... edge,
50 ... second wall, 50a ... edge, 57 ... insertion slot,
61 ... bulge part, 62, 63 ... second bulge part,
70 ... back wall,
90 ... Pocket member (pocket part),
100 ... interior material,
200 ... clip, 205 ... lower flange (end),
300 ... Mold,
CA1 ... cavity, CA1a ... cavity of the base part,
CA1b: Cavity of the portion that becomes the clip mounting seat,
DR1 ... direction outside the vehicle, DR2 ... direction of the passenger compartment, DR3 ... direction opposite to the space,
DR4 ... inward / outward direction, DR5 ... longitudinal direction of the bulging part,
L1 ... predetermined mounting position,
M1 ... resin molding material, M2 ... foam layer, M3, M4 ... skin layer,
OP1 ... opening, SP1 ... space, WL1 ... weld line.

Claims (8)

A clip mounting seat that is integrally formed with a base of an interior material having a stepped portion that rises to the outside of the vehicle via a rising portion that rises from a general portion at an edge, and that can be attached to a clip for fixing to a vehicle body. ,
A head to which the clip can be attached while forming a space in which an end of the clip can be inserted between the step and the step;
The first and second wall portions that connect to the head portion from the upright portion and the stepped portion across the space and support the head portion, and
Between the general part side of the base part and the head part, and between the first wall part and the second wall part, there is an opening connected to a space in which an end of the clip can be inserted. Formed,
The clip mounting seat according to claim 1, wherein a bulging portion that bulges outward is formed at an edge portion along the opening in the head.   At least one of the first wall portion and the second wall portion is formed with a second bulge portion that is connected to the bulge portion and bulges in a direction opposite to the space at the edge portion along the opening. The clip mounting seat according to claim 1, wherein the clip mounting seat is provided. The head is formed with a locking hole that inserts an end of the clip from a boundary portion with the second wall portion and penetrates and locks the end of the clip.
The clip mounting seat according to claim 2, wherein the second bulging portion is formed on the second wall portion.   The clip mounting seat according to any one of claims 1 to 3, wherein the bulging portion intersects a weld line generated in the head.   The clip mounting seat according to any one of claims 1 to 4, wherein the first and second wall portions are disposed in the vicinity of a pocket portion provided in the base portion.   A resin molding material containing a foaming agent is injected into a cavity formed by a molding die, and the base portion having a foam layer formed by expanding a cavity of a portion serving as the base portion is formed integrally with the base portion. The clip mounting seat as described in any one of Claims 5. A clip mounting seat that is capable of attaching a clip for injecting a resin molding material from a part for molding a base portion of an interior material into a mold and integrally molding the base material, and fixing the clip to a vehicle body,
A head to which the clip can be attached while forming a space in which an end of the clip can be inserted between the base and the base;
A first and a second wall part connected to the head part from the base part and supporting the head part across the space;
Between the base part and the head part, and between the first wall part and the second wall part, an opening connected to a space into which an end of the clip can be inserted is formed,
The clip mounting seat according to claim 1, wherein a bulge portion that intersects a weld line generated in the head and bulges to the opposite side of the space is formed at an edge portion of the head along the opening. An interior material in which a base portion having a stepped portion that rises from the general portion to the outside of the vehicle via an upright portion that rises from the general portion, and a clip mounting seat that can be attached to a clip for fixing to the vehicle body are integrally formed. Because
The clip mounting seat is
A head to which the clip can be attached while forming a space in which an end of the clip can be inserted between the step and the step;
The first and second wall portions that connect to the head portion from the upright portion and the stepped portion across the space and support the head portion, and
Between the general part side of the base part and the head part, and between the first wall part and the second wall part, there is an opening connected to a space in which an end of the clip can be inserted. Formed,
An interior material characterized in that a bulging portion that bulges toward the outside of the vehicle is formed at an edge portion along the opening in the head.

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