JP5544964B2 - Interior materials for vehicles - Google Patents

Description

  The present invention relates to a vehicle interior material.

  As a vehicle interior material, for example, a base material containing a fiber covered with a skin material is known (for example, Patent Document 1 below). In the interior material for a vehicle described in Patent Document 1, the skin material is laminated while the base material is heated, and the skin material is bonded simultaneously with the molding by pressing both members with a press die or the like. The skin material is configured to cover the main surface and the end surface of the base material, can improve the appearance, and can suppress touching the end portion of the base material directly with a hand, thereby improving safety.

JP 2008-222208 A

  However, when the skin material is pressed against the base material by press molding or the like as described above, there is a concern that the skin material may be easily peeled off at the end surface of the base material. Because, in general, the press die is often pressed from the direction intersecting the main surface having the largest adhesion surface, and it is difficult to press the skin material against the end surface of the base material compared to the main surface of the base material ( This is because it is difficult to increase the adhesiveness because the pressing force is difficult.

  This invention is completed based on the above situations, Comprising: It aims at providing the interior material for vehicles which can suppress that a skin material peels from a base material.

  In order to solve the above-mentioned problems, an interior material for a vehicle according to the present invention has a plate shape, and a skin material bonded to cover a base material containing vegetable fibers and a main surface and an end surface of the base material. In the base material, by setting the thickness of the peripheral end portion on the end face side smaller than the thickness of the central portion, the surface of the peripheral end portion of the main surface of the base material is the It is characterized by being arranged at a position lower than the surface of the central portion.

  In the present invention, the appearance can be improved by covering the end surface of the base material with the skin material, and it is possible to prevent the hand from touching the end portion of the base material directly, and the safety can be further increased. Here, in order to increase the adhesiveness between the base material and the skin material, it is preferable to strongly press the skin material against the base material with, for example, a press die when the two members are bonded. However, when pressing by applying a force from the direction orthogonal to the main surface having the largest adhesion surface, it is difficult to press the skin material against the end surface of the base material compared to the main surface of the base material (the pressing force is Difficult) and it is difficult to increase the adhesion. That is, it can be said that the end face of the base material is a place where it is difficult to ensure adhesiveness and the skin material is easily peeled off as compared with the main surface of the base material.

  Therefore, in the present invention, the thickness of the peripheral end portion on the end face side of the base material is configured to be smaller than the thickness of the central portion. In this way, for example, the dimension of the end face in the thickness direction of the base material is smaller than that of the configuration having the same thickness over the entire surface of the base material. Thereby, as a result of being able to reduce the area of the end surface of the base material, which is a place where the skin material is relatively easily peeled off, it is possible to suppress the situation where the skin material is peeled off at the end surface. In particular, a substrate made of vegetable fibers has low adhesion to the skin material, and there is a concern that the adhesion may be extremely reduced at the end face. However, by adopting a configuration in which the thickness of the peripheral end portion is smaller than that of the central portion as in the present invention, sufficient adhesiveness at the end face is ensured even when a base material made of vegetable fiber is used. It becomes possible.

  The said structure WHEREIN: The said vegetable fiber shall be a kenaf fiber. Kenaf fiber has higher strength and longer fiber length than, for example, wood fiber. By using such a kenaf fiber, the strength of the substrate can be increased. In addition, kenaf, which is an annual grass, has a large yield and is easily available, so that the manufacturing cost can be reduced.

  The skin material may be heat-pressed to the base material. If the skin material is heated and pressure-bonded to the base material, an adhesive or the like is not required when the two members are bonded, and the cost of the material can be reduced.

  Moreover, the said skin material consists of a raising member, and is thermocompression-bonded with respect to the said base material, The said thermocompression bonding is heated from the opposite side to the said skin material side of the said base material. It can be.

  When the skin material is thermocompression bonded to the base material, the skin material is pressed toward the base material in a heated state. When the skin material is a raised member, the raised hair will be overturned in a heated state, and there is a possibility that it will be held in a state of falling down (hair fall). In this regard, in the present invention, the surface of the peripheral end portion of the base material is disposed at a position lower than the surface of the central portion, and both surfaces are disposed on non-coplanar surfaces. For this reason, even if hair fall occurs at the peripheral end of the skin material, the peripheral end portion is compared with the configuration in which the surface of the peripheral end portion and the surface of the central portion are on the same plane. There is a difference in how the light strikes between the surface of the hair and the surface of the central part, and it is difficult for the hair to fall down.

  In addition, when performing thermocompression bonding, if the substrate is heated from the back side (the side opposite to the side covered with the skin material), the peripheral edge of the substrate (a portion with a relatively small thickness on the substrate) Heat is easily transmitted to the portion of the skin material (the peripheral edge of the skin material) that is bonded to the skin through the base material, and in particular, the hair falls easily. In other words, in the present invention, there is a concern about the occurrence of hair collapse at the skin material peripheral edge by performing thermocompression bonding on the base material having the surface of the peripheral edge lower than the surface of the central part. Even if the hair fall occurs, the peripheral end portion has a stepped shape with different thicknesses, so that the hair fall is hardly noticeable and the appearance can be prevented from being deteriorated.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle interior material which can suppress that a skin material peels from a base material can be provided.

The perspective view which shows the luggage compartment of the vehicle with which the luggage board which concerns on Embodiment 1 of this invention was attached. Sectional drawing which shows the periphery edge part vicinity in the luggage board of FIG. 1 (The figure cut | disconnected by the AA sectional line of FIG. 1). FIG. 2 is an enlarged view (mold open state) showing the vicinity of the outer periphery in the mold for molding the luggage board of FIG. 1. FIG. 2 is an enlarged view (mold closed state) showing an enlarged vicinity of the outer periphery of the mold for molding the luggage board of FIG. 1. The front view which shows the back door to which the back door trim which concerns on Embodiment 2 of this invention was attached. Sectional drawing (figure cut | disconnected by the BB sectional line of FIG. 5) which shows the peripheral edge part vicinity of the back door shown in FIG.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the luggage board 16 is illustrated as an interior material for vehicles. The luggage board 16 according to the present embodiment is installed in, for example, a luggage compartment 10 provided at the rear of the vehicle. FIG. 1 is a perspective view showing the luggage compartment 10 as viewed from the vehicle rear side, and FIG. 2 is a cross-sectional view of the luggage board 16. In FIG. 2, the upper side is the front side of the luggage board 16, and the lower side is the back side.

  As shown in FIGS. 1 and 2, side trims 12 made of a synthetic resin material such as polypropylene are attached to the left and right side walls of the luggage compartment 10. Both side trims 12 have a substantially symmetrical shape in the left-right direction of the cargo compartment 10, and each side trim 12 is synthesized with respect to the vehicle interior surface of the metal body panel 13 constituting the side wall of the cargo compartment 10. It is attached by a resin clip or the like (not shown). The side trim 12 is attached to protect the inner wall surface of the luggage compartment 10, protect the luggage accommodated in the luggage compartment 10, or enhance the design of the interior of the luggage compartment 10. In FIG. 1, the left side trim 12 is not shown.

  The side trim 12 has a shape in which a portion corresponding to the wheel base of the vehicle protrudes toward the interior side of the luggage compartment 10. Therefore, the luggage compartment 10 formed between the side trims 12 has a small width on the front side of the vehicle (upper left side in FIG. 1) and a width on the rear side of the vehicle (lower right side in FIG. 1). It has a large shape. Further, a back door (not shown) for covering the rear of the cargo compartment 10 is provided at the rear of the vehicle. A vehicle occupant or the like can take out the luggage accommodated in the luggage compartment 10 by opening and closing the back door.

  The luggage board 16 has a shape whose outer peripheral portion corresponds to the shape of the side trim 12 in plan view, specifically, a shape in which the width on the front side of the vehicle is reduced and the width on the rear side of the vehicle is increased. There is no. As shown in FIG. 1, the luggage board 16 is placed between the side trims 12 on both sides. As shown in FIG. 2, the luggage board 16 is attached to the floor portion 14 so as to close the storage chamber 15 formed by making the floor portion 14 concave. The vicinity of the peripheral edge portion 21 of the luggage board 16 is placed on the floor portion 14 (specifically, the peripheral portion of the storage chamber 15 in the floor portion 14). As a result, the luggage (for example, spare tires and tools) accommodated in the storage room 15 can be shielded by the luggage board 16, and the luggage can be placed on the luggage board 16.

  As shown in FIG. 2, the luggage board 16 includes a plate-like base material 20, a skin material 30 bonded to cover the front surface (main surface 20 </ b> A) of the base material 20, and the back side of the base material 20. And a nonwoven fabric 40 of synthetic fibers (polyester, polyethylene, etc.) bonded so as to cover the surface 20D.

  The base material 20 is obtained by, for example, mixing a thermoplastic resin such as polypropylene and kenaf fibers (vegetable fibers) with a blender, and then forming the plate into a plate shape using a former or the like. In addition, although the mixing ratio of the thermoplastic resin and the kenaf fiber in the base material 20 is, for example, 50:50 (weight ratio), it is not limited to this mixing ratio and can be changed as appropriate.

  The skin material 30 is a raised member whose surface is raised, and is, for example, a nonwoven fabric of synthetic fibers such as polyester and polyethylene. Such a skin material 30 is formed by, for example, a needle punch method, but may be formed by a manufacturing method other than this.

  As shown in FIG.1 and FIG.2, the outer peripheral part has comprised the gentle level | step difference shape over the perimeter of the base material 20. As shown in FIG. Specifically, the thickness Y1 of the peripheral end portion 21 in the base material 20 is set to be smaller than the thickness Y2 of the central portion 22, and the surface 21A of the peripheral end portion 21 out of the main surface 20A of the base material 20. Is disposed at a position lower than the front surface 22A of the central portion 22 (position close to the back surface of the base material 20). Further, the end surface 20 </ b> B of the base material 20 has a curved surface shape that becomes lower toward the back side of the base material 20. The skin material 30 is bonded so as to cover the main surface 20 </ b> A and the end surface 20 </ b> B of the base material 20.

  In addition, the thickness (the total thickness of the base material 20, the skin material 30, and the nonwoven fabric 40) of the central portion (corresponding to the central portion 22 of the base material 20) in the luggage board 16 is set to 4 mm, for example. The thickness of the peripheral end (corresponding to the peripheral end 21) is set to 2.3 mm, for example. These thicknesses can be appropriately changed. Moreover, although the peripheral edge part 21 of the base material 20 is set by the length (W1 of FIG. 2) about 3 mm inside from the outer peripheral end of the base material 20, this length can also be changed suitably.

  Next, a forming die 50 for forming the luggage board 16 of the present embodiment will be described with reference to FIGS. 3 and 4 are enlarged views showing the vicinity of the outer peripheral portion of the molding die 50 (upper die 60 and lower die 70).

  The lower mold 70 is installed on a base (not shown) and has a flat molding surface 71 corresponding to the back surface shape of the luggage board 16. In the upper mold 60, a concave portion 61 having a concave shape is formed on the surface facing the lower mold 70. The surface shape of the concave portion 61 corresponds to the shapes of the main surface 20 </ b> A and the end surface 20 </ b> B of the luggage board 16. doing. Specifically, the peripheral end 61 </ b> A in the recess 61 has a step shape corresponding to the shape of the peripheral end 21 of the base material 20. The upper mold 60 can be moved in the vertical direction (a direction perpendicular to the main surface 20A of the base material 20) by moving means such as a hydraulic cylinder (not shown). Alternatively, the mold can be opened.

  In a state where the molding die 50 is closed (the state shown in FIG. 4), a molding space S for molding the luggage board 16 is formed between the opposing surfaces of the upper die 60 and the lower die 70. Accordingly, when the base material 20, the skin material 30, and the nonwoven fabric 40 (state of FIG. 3) are set in the lower mold 70 and the pair of molds 2 are closed, the members 20 and 30 constituting the luggage board 16 are formed. , 40 are press-molded into a predetermined shape corresponding to the shape of the molding space S.

  In the lower mold 70, a cutting recess 72 is formed outside the molding surface 71. A cutting convex portion 62 formed outside the concave portion 61 in the upper mold 60 can enter the cutting concave portion 72, and the cutting convex portion 62 enters the cutting concave portion 72. As shown in FIG. 4, a part of the luggage board 16 before molding that protrudes outside from the molding space S (the outer peripheral unnecessary portion 17) can be cut. In addition, the lower mold 70 incorporates a heating device such as a heater (not shown), for example, so that the lower mold 70 can be heated.

  Next, a procedure for manufacturing the luggage board 16 using the mold 50 will be described. First, in the state where the molding die 50 is opened (the state where the upper die 60 and the lower die 70 are separated), the base material 20 in the luggage board 16 on the molding surface 71 of the lower die 70 (a state in which a flat plate shape before molding) is formed. Is placed, and the skin material 30 is placed on the front surface of the base material 20 (state shown in FIG. 3). At this time, the non-woven fabric 40 is preliminarily bonded to the back surface of the base material 20 by, for example, thermocompression bonding, and the surface of the base material 20 (the surface opposite to the surface to which the non-woven fabric 40 is bonded) is the upper mold 60. It is placed in an opposing manner.

  Next, the heater built in the lower mold 70 is operated to heat the lower mold 70. Thereby, the base material 20 is heated from the back surface side (the side opposite to the side on which the skin material of the base material is formed). Thereby, the thermoplastic resin contained in the base material 20 can be melted. In addition, the heating temperature of the base material 20 in this case is set to a temperature higher than the melting point of the thermoplastic resin included in the base material 20, for example. When the thermoplastic resin is, for example, polypropylene, it may be heated to a temperature (for example, 170 to 180 ° C.) that is higher than the melting point (160 ° C. to 170 ° C.) of polypropylene.

  After the base material 20 is heated, when the upper mold 60 is moved toward the lower mold 70 and the mold 50 is closed, the base material 20 is molded into a predetermined shape corresponding to the shape of the molding space S. The At the same time, the skin material 30 is pressed against the base material 20 by being pressed toward the base material 20 in the melted and softened state (thermocompression bonding), and the main surface 20A and the end surface 20B of the base material 20 are bonded. Bonded in a covering form. Further, the outer peripheral unnecessary portion 17 of the luggage board 16 that protrudes outside from the molding space S is sheared by the cutting convex portion 62 entering the cutting concave portion 72. Thereby, the luggage board 16 of this embodiment is shape | molded.

  Next, the effect of the luggage board 16 of this embodiment is demonstrated. The luggage board 16 of the present embodiment sets the thickness Y1 of the peripheral end portion 21 on the end surface 20B side to be smaller than the thickness Y2 of the central portion 22 in the base material 20, The surface 21A of the end portion 21 is disposed at a position lower than the surface 22A of the central portion 22.

  In the present embodiment, the appearance can be improved by covering the end surface 20B of the base material 20 with the skin material 30, and it is possible to suppress touching the end portion of the base material 20 directly, and the safety can be further increased. Here, in order to increase the adhesiveness between the base material 20 and the skin material 30, the skin material 30 is strongly pressed against the base material 20 at the time of bonding the two members by the mold 50 (at the time of thermocompression bonding). Is preferred. However, when pressing is performed by applying a force from a direction orthogonal to the main surface 20A having the largest adhesion surface (when pressing the upper mold 60), the main surface 20A of the base material 20 and the end surface 20B of the base material 20 are In comparison, it is difficult to press the skin material 30 (the pressing force is difficult), and it is difficult to increase the adhesiveness. That is, it can be said that the end surface 20B of the base material 20 is a place where it is difficult to ensure adhesion and the skin material 30 is easily peeled off as compared with the main surface 20A of the base material 20.

  Therefore, in the present embodiment, the thickness Y1 of the peripheral end portion 21 is set to be smaller than the thickness Y2 of the central portion 22 in the base material 20. In this way, for example, the thickness direction of the base material 20 (up and down direction in FIG. 2) is compared with a configuration having the same thickness over the entire surface of the base material 20 (indicated by a two-dot chain line in FIG. 2). The dimension of the end face 20B at is reduced. Thereby, as a result of reducing the area of the end surface 20B of the base material 20 which is a place where the skin material 30 is relatively easily peeled off, the situation where the skin material 30 is peeled off at the end surface 20B can be suppressed. In particular, the base material 20 made of vegetable fibers has low adhesiveness to the skin material 30, and there is a concern that the adhesiveness extremely decreases on the end face 20B. However, by adopting a configuration in which the thickness of the peripheral end portion 21 is made smaller than the central portion 22 as in the present embodiment, even when the base material 20 made of plant fiber is used, the end face 20B is sufficient. Adhesiveness can be ensured.

  In addition, kenaf fiber is used as the vegetable fiber used for the substrate 20. Kenaf fiber has higher strength and longer fiber length than, for example, wood fiber. By using such a kenaf fiber, the strength of the substrate 20 can be increased. In addition, kenaf, which is an annual grass, has a large yield and is easily available, so that the manufacturing cost can be reduced.

  Further, the skin material 30 is thermocompression bonded to the base material 20. If the skin material 30 is configured to be heat-pressed to the base material 20, an adhesive or the like is not necessary when the two members are bonded, and the cost associated with the material can be reduced.

  Moreover, the skin material 30 consists of a raising member, and it was set as the structure which heat-presses from the opposite side to the side in which the skin material 30 of the base material 20 was formed. When the skin material 30 is thermocompression bonded to the base material 20, the skin material 30 is pressed toward the base material 20 by the upper mold 60 in a heated state. When the skin material 30 is a raised member, the raised hair will be fallen in a heated state, and there is a possibility that it will be held in a fallen state (hair fall).

  In this regard, in the present embodiment, the surface 21A of the peripheral end portion 21 of the base material 20 is disposed at a position lower than the surface 22A of the central portion 22, and both surfaces are disposed on non-coplanar surfaces. For this reason, even if hair fall occurs in the peripheral end 21 of the skin material 30, it is compared with a configuration in which the surface 21A of the peripheral end 21 and the surface 22A of the central portion 22 are on the same plane. Then, the surface 21A of the peripheral end portion 21 and the surface 22A of the central portion 22 are different in the way in which the light strikes, and the falling of the hair is less noticeable.

  Further, when the base material 20 is heated from the back side (the side opposite to the side covered with the skin material) during the thermocompression bonding, the base material 20 is bonded to the peripheral end portion 21 having a relatively small thickness. Heat is easily transmitted to the portion of the skin material 30 (that is, the peripheral end portion of the skin material 30) via the base material 20, and hair fall is particularly likely to occur. That is, in this embodiment, the occurrence of hair collapse at the peripheral end portion of the skin material 30 is performed by thermocompression bonding to the base material 20 in which the surface 21A of the peripheral end portion 21 is lower than the surface 22A of the central portion 22. However, even if hair fall occurs, the peripheral edge portion 21 has a stepped shape with different thickness, so that the hair fall is not noticeable and the appearance is lowered. The situation can be suppressed.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the back door trim 116 attached to the back door 110 is illustrated as an interior material for vehicles. 5 is a plan view showing the back side of the back door 110, and FIG. 6 is a cross-sectional view taken along the line BB in FIG.

  The back door 110 of this embodiment includes an outer panel 111 and an inner panel 112. The back door trim 116 has a horizontally long rectangular shape, and is attached to the lower portion of the inner panel 112 with, for example, a clip. As shown in FIG. 6, the peripheral end portion of the back door trim 116 is installed in a stepped portion 112 </ b> A formed in the inner panel 112. Further, a window glass 113 is attached to the upper part of the back door 110, and a locking part 114 that can be locked to a striker (not shown) attached to the vehicle body side is provided in the lower part of the inner panel 112. ing.

  In the back door trim 116 of the present embodiment, the skin material 130 is bonded to the inner surface of the base material 120, and the nonwoven fabric 140 is bonded to the opposite surface to which the skin material 130 is bonded. The back door trim 116 may not include the nonwoven fabric 140.

  Similar to the luggage board 16 of the above embodiment, the peripheral edge 121 has a stepped shape over the entire circumference of the substrate 120. Specifically, the thickness of the peripheral end portion 121 in the base material 120 is set to be smaller than the thickness of the central portion, and among the main surfaces 120A of the base material 120, the surface 121A of the peripheral end portion 121 is the central portion. It is arranged at a position lower than the surface 122A. Moreover, the end surface 120B of the base material 120 has a curved surface shape.

  In the back door trim 116 of the present embodiment, by setting the thickness of the peripheral end portion 121 of the base material 120 to be smaller than the thickness of the central portion, the same effect as that of the luggage board 16 of the above embodiment, that is, the end surface 120B. The effect which suppresses peeling of the skin material 130 and the effect which makes the hair fall in the peripheral edge part 121 inconspicuous can be show | played.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the said embodiment, although the luggage board 16 and the back door trim 116 were illustrated as a vehicle interior material, it is not limited to these. The present invention can be applied to a vehicle interior material having a plate-like base material and a skin material.

  (2) In the above-described embodiment, a configuration in which the luggage board 16 or the back door trim 116 is stepped over the entire circumference of the base material 20 or 120 (a configuration in which the thickness of the peripheral end portion is smaller than the thickness of the central portion). However, the present invention is not limited to this. The thickness of a part of the outer peripheral part of the base material (at least the peripheral end part on the end face side where the skin material is covered) may be smaller than the thickness of the central part.

  (3) The vegetable fiber mixed in the substrate may be other than kenaf fiber. For example, it may be a wood fiber obtained by unweaving wood or the like.

  (4) In the above embodiment, the skin materials 30 and 130 are exemplified by non-woven fabrics of synthetic fibers such as polyester and polyethylene, but are not limited thereto. As the skin material 30, animal skin (genuine leather) such as a synthetic resin sheet, woven fabric, and cowhide can be used, and a member having no raising property may be used.

  (5) In the above embodiment, the configuration in which the base material 20 is heated and the skin material 30 is thermocompression-bonded in a state where the base material 20 is set in the lower mold 70 is illustrated, but the present invention is not limited to this. The base material 20 may be preheated before being set in the lower mold 70. Moreover, the adhesion method of the skin material 30 and the base material 20 is not limited to thermocompression bonding, It is good also as a structure which adhere | attaches with an adhesive agent. Moreover, you may use thermocompression bonding and an adhesive agent together.

  (6) Although the end surfaces 20B and 120B of the base materials 20 and 120 are curved surfaces in the above embodiment, the present invention is not limited to this. The end surfaces 20B and 120B may be flat surfaces.

16 ... Luggage board (interior material for vehicle), 20, 120 ... base material, 20A, 120A ... main surface of base material, 20B, 120B ... end face of base material, 21, 121 ... peripheral edge on end face side, 21A, 121A: surface of peripheral edge, 22A, 122A ... surface of central part, 30, 130 ... skin material, 116 ... back door trim (vehicle interior material), Y1 ... thickness of peripheral edge on end face side, Y2 ... center Part thickness

Claims (4)

A base material having a plate shape and containing vegetable fibers;
A skin material bonded in a form covering the main surface and end face of the base material,
In the substrate, the thickness of the peripheral edge of the end face side by setting smaller than the thickness of the central portion, of the main surface of the substrate, the surface of the peripheral end surface of the central portion An interior material for a vehicle, characterized in that it is formed in a step-like shape .   The vehicle interior material according to claim 1, wherein the vegetable fiber is a kenaf fiber.   The vehicle interior material according to claim 1, wherein the skin material is heat-pressed to the base material. The skin material is made of a brushed member, and is thermocompression bonded to the base material,
3. The vehicle interior material according to claim 1, wherein the thermocompression bonding is heated from a side of the base material opposite to a side on which the skin material is formed.

Images