JP5879672B2 - Interior panel for vehicle - Google Patents

Description

  The present invention relates to an interior panel for a vehicle, and more particularly to an interior panel for a vehicle that achieves weight reduction while realizing an outer shape suitable for mounting as an interior product and has an excellent appearance.

Conventionally, a laminated structure is used as an interior product for a vehicle.
Vehicle interior parts are installed as various vehicle panels in the passenger compartment to cover or cover the recesses of spare tire covers, floor panels, ceiling materials, etc., as partitions for deck boards, tonneau boards, etc. Is used for various applications such as a casing for instrument panels and the like.

Regardless of the application, interior aesthetics for vehicles place an emphasis on aesthetic appearance, and depending on the application, when heavy objects are loaded, compression or bending strength is required, and the load is Even in the case of unloaded applications, for example, it is sufficient to maintain the exterior of the interior itself so that vibrations are transmitted to the interior while the vehicle is running, thereby preventing deformation of the interior. High strength is required.
Patent Document 1 discloses an example thereof, and discloses a laminated interior material of a thermoplastic resin honeycomb core base material and a non-woven fabric laminated as an automobile interior material to be laid on an automobile floor panel.
According to this automobile laying interior material, it is possible to integrally mold an interior material having a curved surface, but the end surface treatment is not applied to the peripheral end surface of the interior material. Many ribs to be formed are exposed, and it is inferior in appearance as an interior material in which the aesthetics in design are emphasized.
An example of solving such a problem is disclosed in Patent Document 2.

Patent Document 2 discloses a laminated plate used for interior materials and exterior materials for vehicles and buildings, and this laminated plate has a decorative material layer, a surface layer to which the decorative material layer is bonded, and a surface layer. And a back layer having a plurality of recesses that are partially bonded. Furthermore, an end surface treatment is performed. Specifically, the decorative material is bent toward the back surface layer side together with the front surface layer at the peripheral end portion of the laminated plate, and is fused to the side surface of the rib forming the recess. Thereby, unlike patent document 1, it is possible to cover many ribs with the folded decorative material, and to maintain the external appearance.
However, according to this laminated board, the following technical problems are caused due to the end face treatment.

  First, the cosmetic material is crushed at the end face and the appearance deteriorates. More specifically, when the decorative material is bent together with the front surface layer toward the back surface layer side, the bottom portion of the plurality of recesses bonded to the front surface layer is bonded to the front surface layer using a hot blade having a predetermined length. When cutting together with the surface layer and the decorative material in the thickness direction, not only the surface layer and the back surface layer but also the decorative material is heat-compressed, melted and crushed hard at the end surface. Thereby, the end surface portion of the decorative material for improving the appearance is locally crushed to lose flatness, and the appearance is deteriorated by heating.

  In relation to such technical problems, in particular, when the outer shape of the laminate is a three-dimensional shape such as a curved surface, or when the hinge is provided on the laminate, the laminate has been conventionally heated and compressed by hot pressing. The honeycomb core base material is crushed by hot pressing, and it becomes difficult to maintain the thickness of the laminate itself. When a laminated board is incorporated as an interior product, a step or seam is produced between the surface of the mating member to be incorporated and the aesthetic appearance is impaired.

  Secondly, a problem arises in that there are restrictions on the arrangement of the plurality of recesses. More specifically, when cutting the bottom surfaces of the plurality of recesses bonded to the surface layer together with the surface layer and the decorative material in the thickness direction of the laminate using a hot blade having a predetermined length, the plurality of ribs are formed. In order to cover it, it is necessary to bend the decorative material together with the surface layer. In this case, all of the plurality of recesses cut at a time by the hot blade are aligned and arranged in a substantially straight line so that the bottom portion is cut. There is a need.

  For such an interior material, as long as the plurality of recesses have sufficient strength to maintain the outer shape, rather than ensuring strength, particularly compressive strength of the laminate, by the ribs constituting the recess, the interior material It is used to secure the required outer shape, particularly the thickness of the laminated board, depending on the situation of the body member panel such as the floor panel of the automobile, the inner wall of the door, etc.

  In this regard, Patent Document 3 discloses a molded ceiling for an automobile, and the molded ceiling for an automobile has a laminated structure in which a base material and a skin material exposed to the outside are integrally attached, and particularly a base material. On the other hand, the skin material integrally has an extension portion that protrudes from the end portion of the base material, and the extension portion projects upward from the base material end portion toward the vehicle body side ceiling panel by the shape retention force of the skin material. In this way, it is possible to maintain the appearance aesthetics by preventing the end portion of the base material from being seen from the inside of the vehicle without performing an end face treatment.

However, unlike the patent document 1 and the patent document 2, the base material of the molded ceiling for automobiles is a solid single plate, which is heavier than the case of having a hollow portion, and is suspended from the vehicle body side ceiling panel side. Since it is only mounted in a form, it is desirable to reduce the weight as much as possible to maintain the outer shape. In particular, for automobiles, from the viewpoint of reducing carbon dioxide emissions from fossil fuels, it is an urgent task to reduce the weight of interior parts as much as possible.
JP-A-7-96791 JP2001-18308 JP-A-7-291049

  In view of the above technical problems, an object of the present invention is to provide an interior panel for a vehicle that achieves a weight reduction while realizing an outer shape suitable for mounting as an interior product and has an excellent external appearance. It is in.

In order to achieve the above object, an interior panel for a vehicle according to the present invention includes:
A vehicle interior having a laminated structure including a resin front surface layer and a resin back layer having a plurality of tapered concave portions each welded to the inner surface of the resin front surface layer A panel,
Each of the front surface layer and the back surface layer has a thickness of 1.5 mm or less and contains at least one inorganic filler selected from the group consisting of silica, mica, talc, calcium carbonate, glass fiber, and carbon fiber. Formed by a thermoplastic resin sheet,
Each of the plurality of recesses is constituted by a rib extending from the inner surface of the back surface layer to the inner surface of the front surface layer, and by welding the outer peripheral surface of the front surface layer and the back surface layer. A space portion that is closed by the outer peripheral wall that is configured is formed,
It is set as the structure by which the welding part of the said some recessed part and the inner surface of the said front surface layer and the welding part of the outer peripheral surface of the said outer peripheral wall are formed at once.

Further, a decorative material sheet is integrally attached to the outer surface of the resin front surface layer, and a three-layer laminated structure of the decorative material sheet, the front surface layer, and the back surface layer is preferable.
Furthermore, the inorganic filler is preferably added in an amount of 50 wt% or less with respect to a molding resin having an MFR of 230 g or less at 230 ° C. constituting the front surface layer and the back surface layer.

A vehicle interior product according to a first embodiment of the present invention will be described below in detail with reference to the drawings.
In this embodiment, the case where it uses for the auxiliary | assistant board of the deck board for motor vehicles is demonstrated as an example.
As shown in FIGS. 1 to 3, the vehicle interior 100 is attached to the front surface skin material sheet 120A, the back surface skin material sheet 120B, and the outer surface 150 of the front surface skin material sheet 120A. The vehicular interior 100 has a three-layer structure including a decorative material sheet 140, a front surface skin material sheet 120A, and a back surface skin material sheet 120B. In FIG. 1, in order to clearly show the internal structure of the vehicle interior product 100, the periphery of the periphery of the vehicle interior product 100 is omitted.

  The thickness of each of the front side skin material sheet 120A and the back side skin material sheet 120B and the overall thickness of the vehicle interior product 100 may be appropriately determined according to the use of the vehicle interior product 100. When used for an automobile deck board, the thickness of each of the front side skin sheet 120A and the back side skin sheet 120B is 1.5 mm or less, preferably 1.0 mm or less. The total thickness is 15 mm or less, preferably 10 mm or less.

The back side skin material sheet 120B is bonded to the inner surface 170, which is the surface opposite to the surface (outer surface) 150 to which the decorative material sheet 140 of the front side skin material sheet 120A is bonded. The depth of the plurality of recesses 200 substantially constitutes the thickness of the laminated structure board 100. Each of the plurality of recesses 200 is inwardly protruded on the inner surface side by a rib 122 extending between the inner surface 180 of the back surface skin sheet 120B and the inner surface 170 of the front surface skin sheet 120A. Each of the plurality of recesses 200 has a bottom, and has a butting flat surface portion 240 at the most detail, so that the butting flat surface portion 240 is bonded to the surface 170.
The number of the plurality of recesses 200 may be set as appropriate depending on the application of the vehicle interior 100, but as the number increases, the weight reduction is promoted, but the rigidity decreases.

  As shown in FIG. 1, in each of the plurality of recesses 200, the opening 260 in the outer surface 220 is a regular hexagonal truncated pyramid, and the openings 260 are arranged in a honeycomb shape on the outer surface 220. That is, on the outer surface 220, the opposing sides of the adjacent openings 260 are arranged so as to be parallel to each other. Thereby, it is possible to arrange the plurality of concave portions 200 on the outer surface 220 most densely. Regarding the size of the opening 260 of each of the plurality of recesses 200, the depth of the recesses 200, and the interval between the adjacent recesses 200, the size of the opening 260 is small, the depth of the recesses 200 is deep, and the interval between the adjacent recesses 200 is It is possible to improve the lightness of the vehicle interior product 100 as a whole as the value of is smaller.

Of the plurality of recesses 200, one recess 200 forms a groove (not shown) extending over the entire width direction of the back surface skin sheet 120 </ b> B, and the hinge part having the extending direction of the groove as a hinge axis Nonetheless, as will be described later, one part of the vehicle interior product 100 divided by the hinge shaft is rotatable about the hinge shaft with respect to the other portion.
As a modified example, the plurality of recesses 200 are preferably distributed evenly on the outer surface 220, but the shapes thereof are various shapes such as a cone shape, a truncated cone shape, a cylindrical shape, a prism shape, a pyramid shape, and a hemispherical shape. May be selected as appropriate.

  FIG. 4 is a partial sectional view showing in detail the periphery of the outer peripheral wall of the vehicular interior article 100. As shown in FIG. 4, between the front side skin material sheet 120A and the back side skin material sheet 120B, the inner surface 180 of the back side skin material sheet 120B, the front side skin material sheet 120A. A sealed hollow portion 280 constituted by the inner surface 170 and the outer surface of the rib 122 is formed, and the sealed hollow portion 280 is closed at the peripheral end surface of the laminated structural board 100 by the outer peripheral wall of the back surface skin sheet 120B. Yes.

  As shown in FIG. 4 (A), each of the decorative material sheet 14 and the front surface skin material sheet 120A has a lip 290 whose peripheral edge is curved on one side, and the back surface skin material sheet 120B is An end peripheral surface 294 having a peripheral edge 292 that is curved on one side, directed to one side of the edge 290 of each of the decorative material sheet 14 and the front surface skin sheet 120A, and the back surface side The outer peripheral surface of the outer peripheral wall is configured by abutting the end peripheral surface 296 directed to one side of the edge 292 of the skin material sheet 120B. Thereby, the outer peripheral surface of the outer peripheral wall is constituted by the outer peripheral surface of the decorative material sheet 14 and the outer peripheral surface of the back side skin material sheet 120B, and the butting portion has a butting line P extending in the circumferential direction on the outer circumferential surface. Although formed, the outer peripheral surface of the decorative material sheet 14 and the outer peripheral surface of the back-side skin material sheet 120B are configured to be continuously and smoothly connected. According to such a configuration, it is possible to maintain the aesthetic appearance without a joint or a step at the butt line P that is the boundary between the outer peripheral surface of the decorative material sheet 14 and the outer peripheral surface of the back surface skin sheet 120B. It is.

  As a modified example, as shown in FIG. 4 (B), as in FIG. 4 (A), each of the decorative material sheet 14 and the front surface side skin material sheet 120A has a peripheral edge curved to one side. On the other hand, the back-side skin material sheet 120B has a flat plate shape including its peripheral edge, and has an edge directed to one side of the edge 290 of each of the decorative material sheet 14 and the front-side skin material sheet 120A. The outer peripheral surface of the outer peripheral wall may be configured by abutting the peripheral surface 294 with the inner surface 180 of the back surface skin sheet 120B.

As a further modification, as shown in FIG. 4 (C), each of the decorative material sheet 14 and the front surface skin material sheet 120A has a flat plate shape including its peripheral portion, while the back surface skin material sheet 120B. As shown in FIG. 4A, the peripheral portion has a lip 292 that is curved on one side, the inner surface 170 of the front side skin material sheet 120A, and the lip 292 of the back side skin material sheet 120B. The outer peripheral surface of the outer peripheral wall may be configured by abutting the end peripheral surface 296 directed to one side of the outer peripheral wall.
In particular, according to FIG. 4 (B), when the vehicular interior article 100 is mounted so as to be incorporated in the recess in a form in which the decorative material 14 is exposed in the vehicle compartment, it is compared with FIG. 4 (A) and FIG. 4 (C). Since the butting line P is formed at a deep position and is difficult to see, it is advantageous from the viewpoint of aesthetic appearance.

  The thermoplastic resin sheet P, which is the material of the front side skin material sheet 120A and the back side skin material sheet 120B, is made of a sheet formed from polypropylene, engineering plastics, olefin resin, or the like. More specifically, from the viewpoint of preventing the thermoplastic resin sheet P from being stretched by its own weight, such as drawdown and neck-in, to cause partial thinness due to the sheet extruded into a molten state, resulting in variations in thickness. It is preferable to use a resin material having a high melt tension. On the other hand, it is preferable to use a resin material having a high fluidity in order to improve transferability to a mold and followability.

  More specifically, one or two or more types of polyolefins (for example, polypropylene and high density polyethylene) which are homopolymers or copolymers of olefins such as ethylene, propylene, butene, isoprene pentene and methyl pentene are blended. MFR at 230 ° C. (measured at a test temperature of 230 ° C. and a test load of 2.16 kg according to JIS K-7210) is 3.0 g / 10 min or less, more preferably 0.3 to 1.5 g / 10. Use minutes. Or an amorphous resin such as acrylonitrile / butadiene / styrene copolymer, polystyrene, high impact polystyrene (HIPS resin), acrylonitrile / styrene copolymer (AS resin), and MFR at 200 ° C. (according to JIS K-7210). According to this, a sample having a test temperature of 200 ° C. and a test load of 2.16 kg) of 3.0 to 60 g / 10 min, more preferably 30 to 50 g / 10 min is used. Further, a melt tension at 230 ° C. (using a melt tension tester manufactured by Toyo Seiki Seisakusho Co., Ltd.), a strand was extruded from an orifice having a diameter of 2.095 mm and a length of 8 mm at a preheating temperature of 230 ° C. and an extrusion speed of 5.7 mm / min. The tension when the strand is wound around a roller having a diameter of 50 mm at a winding speed of 100 rpm) is 50 mN or more, preferably 120 mN or more.

In order to prevent the thermoplastic resin sheet P from cracking due to impact, it is preferable that a hydrogenated styrene thermoplastic elastomer is added in a range of less than 30 wt%, preferably less than 15 wt%. Specifically, a styrene-ethylene / butylene-styrene block copolymer, a styrene-ethylene / propylene-styrene block copolymer, a hydrogenated styrene-butadiene rubber and a mixture thereof are suitable as the hydrogenated styrene-based thermoplastic elastomer. The styrene content is less than 30 wt%, preferably less than 20 wt%, and the MFR at 230 ° C. (measured at a test temperature of 230 ° C. and a test load of 2.16 kg according to JIS K-7210) is 1.0 to 10 g / 10. Minute, preferably 5.0 g / 10 min or less and 1.0 g / 10 min or more.
Furthermore, the thermoplastic resin sheet P may contain an additive. Examples of the additive include silica, mica, talc, calcium carbonate, glass fiber, carbon fiber, and other inorganic fillers, plasticizers, and stabilizers. , Colorants, antistatic agents, flame retardants, foaming agents and the like.
Specifically, silica, mica, glass fiber or the like is added in an amount of 50 wt% or less, preferably 30 to 40 wt%, based on the molding resin.

  In the case where the decorative material sheet 140 is provided on the surface of the thermoplastic resin sheet P, the decorative material sheet 140 is an object that improves appearance, decoration, and contacts with the molded product (for example, in the case of a cargo floor board, the decorative material sheet 140 is placed on the upper surface of the board. It is configured for the purpose of protecting the luggage that is placed). The material of the decorative material sheet 140 is a fiber skin material, a sheet-like skin material, a film-like skin material, or the like. As the material of such a fiber skin material, synthetic fibers such as polyester, polypropylene, polyamide, polyurethane, acrylic and vinylon, semi-synthetic fibers such as acetate and rayon, regenerated fibers such as viscose rayon and copper ammonia rayon, cotton, hemp, Examples thereof include natural fibers such as wool and silk, or blended fibers thereof. In particular, it is preferably made of synthetic fibers from the viewpoint of adhesiveness with the surface layer.

  Among these, polypropylene or polyester is preferable and polyester is more preferable from the viewpoints of touch, durability, and moldability. The yarn used for the fiber skin material is, for example, polyester: (3-5) denier × (50-100) mm or other fineness of 3-15 denier, and a staple spun yarn having a fiber length of about 2-5 inches Polyester in a bundle of thin flexible filaments: about 150 to 1000 denier / 30 to 200 filaments = about 5 denier × 30 to 200 multifilaments, or polyester: 400 to 800 deniers per filament -It is preferable to use in combination with a filament.

  Examples of the structure of the decorative material sheet 140 include non-woven fabrics, woven fabrics, knitted fabrics, and fabrics obtained by raising them. The woven fabric includes not only a plain structure in which the woven structure is tangled up and down in order, but also various changed woven forms in which some yarns are entangled and jumped. Among these, since there is no directionality with respect to elongation, a non-woven fabric is preferable because it can be easily formed into a three-dimensional shape and has excellent adhesion to the surface layer, surface tactile sensation, and texture. Here, the non-woven fabric means a cloth-like product in which fibers are stacked in parallel or alternately or are randomly dispersed to form a web, and then the fibers that become the web are joined. Among these, it is preferable that it is a nonwoven fabric manufactured by the needle punch method from a viewpoint of the three-dimensional shape reproducibility of a molded article, and an external appearance characteristic. In addition, since the nonwoven fabric obtained by the needle punch method has lower strength and higher elongation than the woven fabric and has a large degree of deformation in any direction, it improves the strength of the nonwoven fabric and stabilizes its dimensions. For this reason, it is more preferable to attach a binder to the woven fabric or to punch the web and the nonwoven fabric with overlapping needles. From these things, it is more preferable that the decorative material sheet 140 is a polypropylene nonwoven fabric or a polyester nonwoven fabric. In this case, since the decorative material sheet 140 itself is thermoplastic, it can be used for another purpose by being heated and deformed after separation and collection. For example, if the main resin layer is made of polypropylene and the decorative material sheet 140 is made of a polypropylene nonwoven fabric, the main resin layer and the decorative material sheet 140 of the molded product are the same material, which facilitates recycling.

On the other hand, if the decorative material sheet 140 is a polyester non-woven fabric, the melting point of the main resin layer composed of polypropylene and the fiber skin material are different, so that when the decorative material sheet 140 is bonded to a molded product, it is altered or deformed by heat. Or problems such as failure to adhere to the correct position can be suppressed. In this case, the moldability, rigidity, appearance and durability are also excellent. Further, the tensile strength of the decorative material sheet 140 is preferably 15 kg / cm ² or more from the viewpoint of three-dimensional shape reproducibility and moldability, and the elongation is preferably 30% or more. In addition, the value of this tensile strength and elongation is measured based on JIS-K-7113 at the temperature of 20 degreeC. As the sheet-like skin material and film-like skin material, thermoplastic elastomer, embossed resin layer, resin layer with printed layer attached to the outer surface, synthetic leather, non-slip mesh-shaped skin layer, etc. can be used. .

The effect | action is demonstrated below about the interior goods 100 for vehicles which have the above structure.

FIG. 5 shows a state in which the vehicle interior 100 is mounted on a car deck board 300, and FIG. 6 is a perspective view of the vehicle interior 100 for such a use. The vehicle interior 100 is a blindfolded plate by covering a dead space 308 between the rear seat 306 and the deck board 300, which includes the cushion seat 302 and the back seat 304 provided so as to be tiltable with respect to the cushion seat 302, from above. Used.
More specifically, the vehicle interior 100 is disposed between the rear seat 306 and the deck board 300 with the hinge shaft formed by the concave groove directed in the width direction of the vehicle.

  In a normal case, the movable portion 316 is rotated with respect to the fixed portion 310 via the hinge portion 314 in a state where the fixed portion of the vehicle interior 100 is fixed to the concave portion 312 of the deck board 300 by, for example, screwing or the like. When the leading end of the movable portion 316 leans against the back surface 318 of the back sheet 304 and the back sheet 304 is pushed forward, the movable portion 316 rotates forward via the hinge portion 314 to The sheet 304 is placed in the recess 320 provided on the back surface 318. Thus, while the decorative material sheet 14 of the vehicle interior 100 is arranged so as to be exposed from the interior of the vehicle, the back surface 318 of the back sheet 304 and the vehicle interior 100 are functioning as a blindfold plate of the dead space 308. The outer surface of the decorative material sheet 14 and the upper surface of the deck board 300 are flush with each other, and a long product, for example, ski equipment can be mounted in the front-rear direction of the vehicle.

At this time, by appropriately adjusting the depth of the recess, the vehicle interior article 100 does not cause a step between the outer surface of the decorative material sheet 14 and the upper surface of the deck board 300 or the back surface 318 of the back sheet 304. Can be mounted in the concave portion 312 of the deck board 300 and the concave portion 320 of the back sheet 304, and is not deformed by the weight of the load mounted on the outer surface of the decorative material sheet 14, or is deformed by vibration during traveling of the vehicle. The strength can be maintained without any problem.
Such a vehicular interior article 100 may be molded by so-called integral molding, or may be molded separately.

In the former case, a molten thermoplastic resin sheet P positioned between two divided molds may be molded by clamping the two divided molds. More specifically, a step of providing a pair of split molds in which a plurality of protrusions that protrude from one mold toward the other mold are provided in the cavity, and one of the back side skin material sheet 120 is provided. Two molten thermoplastic resin sheets, which are materials and the other is the material of the front side skin material sheet 120A, around the fused portion forming portion arranged annularly at a predetermined interval from each other. Positioning between a pair of split molds in a protruding form, one sheet as the material of the back-side skin material sheet 120, and the cavity of one mold facing the outer surface of one sheet Forming a sealed space between the mold and the one mold by sucking the sealed space from one mold side and pressing the outer surface of the one sheet against the cavity of the one mold. To form a recess The floor and a pair of molds are clamped, the peripheral edges of two molten thermoplastic resin sheets, and the top of the recesses formed in one sheet on the inner surface of the other sheet, respectively And welding. In this case, the decorative material sheet 14 may be held in advance, for example, in a suction manner in the other mold facing the thermoplastic resin sheet that is the material of the front skin sheet 120A.
Thereby, by clamping the pair of molds, the outer peripheral wall is formed by the fused portion arranged annularly at the peripheral portion, and without damaging the beauty of the peripheral portion without performing the end face treatment, It is possible to manufacture a vehicle interior product having a space inside.

  According to such a molding method, the sealed hollow portion 280 is provided at a desired position between the front-side skin material sheet 120A and the back-side skin material sheet 120B according to the use of the vehicle interior 100. While forming so that a desired surface shape (flat or curved surface) may be exhibited, the front side skin material sheet 120A and the back side skin material sheet 120B are welded, and the outer shape or the usage according to the use of the vehicle interior product 100 It is possible to provide a vehicular interior article 100 capable of realizing a surface shape and an internal structure as desired. In particular, the peripheral surfaces of the front-side skin material sheet 120A and the back-side skin material sheet 120B are welded together to form a fusion line, thereby forming the sealed hollow portion 280.

In particular, the molding may be performed using primary molding and secondary molding. That is, the molten thermoplastic resin sheet that is the material of the back-side skin material sheet 120 and the molten thermoplastic resin sheet that is the material of the front-side skin material sheet 120A are respectively extruded by extrusion molding. Then, it may be disposed between the pair of split molds in a molten state. According to such a method, whenever the molten resin is intermittently extruded in the primary molding, the sheet-like vehicle interior product 100 can be molded one after another, and the thermoplastic resin is obtained by extrusion molding (primary molding). Can be intermittently extruded as a thermoplastic resin sheet P in a molten state, and the thermoplastic resin sheet P extruded by vacuum molding (secondary molding) can be integrally molded using a split mold.
On the other hand, in the latter case, the front side skin material sheet 120A, the back side skin material sheet 120B and the decorative material sheet 14 are individually molded by, for example, extrusion molding, injection molding or the like, and individually molded. These sheets may be completed by, for example, bonding with an adhesive or vibration welding.

According to the vehicle interior having the above-described configuration, the decorative material is provided in the vehicle interior of the laminated structure including the front surface skin sheet 120A and the back surface skin sheet 120B to which the decorative material layer is bonded. When arranged so as to be exposed, each bottom portion has a plurality of recesses 200 bonded to the surface opposite to the surface to which the decorative material layer of the front surface skin material sheet 120A is bonded. 120B, a plurality of recesses 200 are provided without any restrictions in arrangement so that the outer shape, particularly the thickness, required according to the situation of the counterpart member to which the vehicle interior product is mounted can be realized. By appropriately adjusting the height of the ribs to be configured, the necessary thickness as the laminated structure is substantially secured, and the weight reduction is achieved by providing the plurality of recesses 200, while the front surface side With skin material sheet 120A The space formed between the surface-side skin material sheet 120B is closed by the outer peripheral wall of the back-side skin material sheet 120B at the peripheral end surface of the laminated structure, and the outer peripheral surface of the outer peripheral wall is The outer peripheral surface and the outer peripheral surface of the back side skin material sheet 120B are configured, and the outer peripheral surface of the decorative material sheet 14 and the outer peripheral surface of the back side skin material sheet 120B are continuously and smoothly connected to each other. It is possible to maintain the appearance of the interior parts, especially the peripheral edge, without reducing the weight while achieving an external shape that is suitable for mounting as an interior part. It is possible to present.

Below, 2nd Embodiment of this invention is described in detail with reference to drawings. In the following description, the same reference numerals are given to the same constituent elements as those in the first embodiment, and the description thereof will be omitted, and the features of the present embodiment will be described in detail below.

Unlike the first embodiment, the feature of the present embodiment is that in the space formed between the front side skin material sheet 120A and the back side skin material sheet 120B by devising the arrangement of the recesses 200. A so-called folded meat of plate-like rib pieces is formed between the adjacent recesses 200, and the bent rigidity is used to improve the flexural rigidity in the longitudinal direction of the interior product.
The plurality of recesses 200 are bent plate-shaped rib pieces extending from the inner surface 180 of the back surface skin sheet 120B to the front surface skin material sheet 120A between the adjacent recesses 200 in the sealed hollow portion 280. They are arranged at an interval necessary to form the meat 124.

More specifically, as shown in FIG. 7, in FIG. 1 of the first embodiment, the plurality of recesses 200 are arranged in a honeycomb shape, but the plurality of recesses 200 are formed on the back side skin material sheet 120B. On the outer surface, the apexes of the adjacent openings 260 are arranged so as to be closest to each other. More specifically, for example, in FIG. 1, in the adjacent regular hexagonal openings, the opposing sides are arranged in parallel, and the interval between the sides constitutes the interval between the adjacent openings. In FIG. 7, in the adjacent regular hexagonal openings, one regular hexagonal vertex of each opening is arranged on a line connecting the respective opening centers, so that the interval between these vertexes is adjacent to each other. Configure the interval.
In order to realize such an arrangement of the openings, by forming the vehicle interior 100 by vacuum forming, as shown below, between the adjacent recesses 200 (more precisely, each of the adjacent recesses 200 is configured. A so-called bent meat is formed between the outer surfaces of the ribs 122).

  That is, in the case of forming the bent meat, as described in the first embodiment, the vehicle interior product may be formed by vacuum forming using the split mold, and the split mold is clamped. By sucking the inside of the sealed space from one mold side, the thermoplastic resin sheet is pressed toward the cavity and shaped, and at that time, a plurality of protrusions are placed on the cavity at positions close to each other. By using the fact that the resin cannot be extended to the base portion of the adjacent protrusions, the folded meat constituting the plate-like ribs may be formed.

More specifically, such a bent meat 124 presses the thermoplastic resin sheet, which is the material of the back surface skin sheet 120B, against the protrusion provided in the cavity of the mold, regardless of vacuum molding or blow molding. This is caused by forming a plurality of recesses 200 on the outer surface of the back side skin material sheet 120B. More specifically, in the plurality of protrusions provided in the cavity corresponding to the plurality of recesses 200, a portion where the interval between adjacent protrusions is narrow is a molten thermoplastic resin sheet as compared to the other portions. Is stretched by shaping, it becomes difficult to reach the front-side skin material sheet 120A, so that linearly extending plate-like wrinkles that connect adjacent protrusions are formed.
As shown in FIGS. 8 and 9, the folded meat 124 has a substantially V-shaped cross section from the inner surface 180 of the back surface skin sheet 120B to the front surface skin sheet 120A. The interior 125 for the vehicle extends in the thickness direction, and the top portion 125 terminates in front of the inner surface of the front surface skin sheet 120A.
As described above, in order to form the desired bent meat 124, the interval between the adjacent protrusions is important, and as shown in FIG. It is formed so as to include the ridgeline of the rib 122 extending from the apex that is closest to the adjacent opening 260 toward the front side skin material sheet 120A.
In this regard, as shown in FIG. 1, when a plurality of recesses 200 are arranged in a honeycomb shape, a locally narrow portion is not formed between adjacent openings as shown in FIG. 7. Broken meat is difficult to form.

In particular, when the thermoplastic resin sheet, which is the material of the back surface skin sheet 120B, is extruded vertically downward by primary molding and disposed between the divided molds, the interval between the adjacent recesses 200 is constant. Nevertheless, as shown in FIG. 8, a fold 124 is formed between the recesses 200 adjacent to each other in the direction D1 (extrusion direction) in FIG. 7, while as shown in FIG. 10, D2 in FIG. No crease is formed between the recesses 200 adjacent to each other in the direction or the D3 direction. This is due to the gravitational force acting on the thermoplastic resin sheet in the molten state, and it is presumed that the vertical direction is more likely to bend than the horizontal direction.
If this property is used, the interior of a rectangular vehicle having a long side in the extrusion direction usually lacks the flexural rigidity in the extrusion direction. It is possible to reinforce the flexural rigidity of the.

In this way, by adjusting the arrangement of the plurality of recesses 200 without restriction, the inner surface 180 of the back side skin material sheet 120B is interposed between the adjacent recesses 200 in the sealed hollow part 280 through vacuum forming. By forming the folded meat 124 extending toward the surface-side skin material sheet 120A, the base portion near the opening 260 provided on the outer surface 220 of the back-side skin material sheet 120B of the plurality of recesses 200 is thinned accordingly. Even if this causes a lack of strength as a structural strength member, a plate-like rib piece that connects the adjacent concave portions 200 to each other is constituted by such a bent meat 124, so that weight reduction is achieved and vehicle interior is achieved. While ensuring the necessary overall thickness for the product 100, it is possible to ensure the strength required for maintaining the outer shape of the interior product uniformly throughout the interior product. It is possible.
Further, by adjusting the distance between the adjacent recesses 200 to provide the bent meat 124 (see FIG. 9) having a desired thickness D and height H, the bending rigidity particularly in the thickness direction of the vehicle interior 100 is provided. It is also possible to locally adjust the rigidity by ensuring the distribution or adjusting the distribution of the bent meat 124 on the vehicle interior product 100.

In addition, as shown in FIG. 7, such a folded meat has a linear mark L connecting between the concave portions 220 adjacent to each other on the outer surface 220 of the back-side skin material sheet 120 </ b> B, As this linear mark L impairs the appearance of the outer surface 220 of the back side skin material sheet 120B, the occurrence of bent meat has been treated as unfavorable in the past, but in the case of an interior product according to the present invention, The cosmetic material sheet 14 attached to the outer surface 150 of the front surface skin sheet 120A is visually recognized from the interior of the vehicle and emphasizes aesthetic appearance. However, the outer surface 220 of the back surface skin sheet 120B is important. Is not visible from the interior of the vehicle due to the installation of the interior parts. Therefore, the occurrence of such a linear mark L does not cause a problem in appearance, and the folded meat is used for improving the rigidity. Folded meat in the longitudinal direction of interior products By forming, it is possible longitudinal bending stiffness to reinforce the point inferior to that of the short direction.

Although the embodiments of the present invention have been described in detail above, various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention. For example, in the first embodiment, it has been described as an interior product for automobiles, but is not limited thereto, and is not limited to general vehicles such as railway vehicles, airplanes, ships, and special vehicles such as amusement park vehicles. In particular, in the case of special vehicles, resin-made interior products are suitable because aesthetics including color are emphasized for infants.
Moreover, in 1st Embodiment, although demonstrated as a flat-shaped interior item, it is not limited to it, For example, it can apply also to the use which has solid shapes, such as a ceiling material and an instrument panel, In that case, it is lightweight. It is possible to secure the necessary thickness while achieving rigidity and maintaining rigidity capable of maintaining the outer shape.
Furthermore, in the second embodiment, the case where the bent meat is formed only in one direction has been described. However, the present invention is not limited to this, and by adjusting the arrangement of the plurality of recesses, not only the extrusion direction but also adjacent to each other. A bent meat may be formed without leaking between the recesses, and the flexural rigidity may be reinforced uniformly for the entire interior product.

It is a fragmentary perspective view of the interior goods for vehicles concerning a 1st embodiment of the present invention. FIG. 2 is a cross-sectional view of the vehicle interior product along line AA in FIG. 1. It is sectional drawing of the vehicle interior goods along line BB of FIG. It is a fragmentary sectional view showing the circumference of the peripheral edge part of the interior goods for vehicles concerning a 1st embodiment of the present invention. It is a schematic perspective view which shows the state with which the vehicle interior goods concerning 1st Embodiment of this invention were mounted | worn. 1 is an overall perspective view of a vehicle interior product according to a first embodiment of the present invention. It is a figure similar to FIG. 1 which concerns on 2nd Embodiment of this invention. It is a figure similar to FIG. 3 which concerns on 2nd Embodiment of this invention. FIG. 9 is a cross-sectional view of the bent meat along the line CC in FIG. 8. It is a figure similar to FIG. 2 which concerns on 2nd Embodiment of this invention.

P butt line 100 interior parts for vehicles
120 Skin material sheet 122 Rib 124 Folded meat 125 Top part 140 Cosmetic material sheet 150 Outer surface 170 Inner surface 180 Inner surface 200 Recess 220 Outer surface 240 Abutting flat part 260 Opening 280 Sealed hollow part 300 Deck board 302 Cushion sheet 304 Back sheet 306 Rear sheet 308 Dead space 310 Fixed portion 312 Recessed portion 314 Hinge portion 316 Movable portion 318 Back surface 320 Recessed portion

Claims (3)

Non-foamed resin front surface layer, and a laminated structure composed of only a non-foamed resin back surface layer having a plurality of tapered recesses, each of which is welded to the inner surface of the resin front surface layer Vehicle interior panel
Each of the front surface layer and the back surface layer has a thickness of 1.5 mm or less and contains at least one inorganic filler selected from the group consisting of silica, mica, talc, calcium carbonate, glass fiber, and carbon fiber. Formed by a thermoplastic resin sheet,
Each of the plurality of recesses is constituted by a rib extending from the inner surface of the back surface layer to the inner surface of the front surface layer, and by welding the outer peripheral surface of the front surface layer and the back surface layer. A space portion that is closed by the outer peripheral wall that is configured is formed,
The plurality of concave portions have concave grooves extending over the entire width direction of the back surface layer, and the concave grooves form a hinge portion having a direction in which the concave groove extends as a hinge axis, and the hinge portion is a vehicle. By placing it between the rear seat and the deck board in the state of facing in the width direction, it functions as a blind space blind board between the rear seat and the deck board,
A vehicle interior panel characterized by that. A decorative material sheet is integrally attached to the outer surface of the resin front surface layer, and has a three-layer laminated structure of the decorative material sheet, the front surface layer, and the back surface layer. The vehicle interior panel according to 1. The inorganic filler has an MFR of 3.0 g / 1 at 230 ° C. constituting the front surface layer and the back surface layer.
The vehicle interior panel according to claim 1, wherein 50 wt% or less is added to a molding resin of 0 minutes or less.

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