JP2012218485A - Vehicle interior material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a holding strength of a skin material, and to maintain an aesthetic appearance of a design surface.SOLUTION: A vehicle interior material 10 includes an interior base material 20 and the skin material 30 that covers the interior base material 20. The skin material 30 has a body part 31 and an extension 33 extended from the end 32 of the body part 31. The interior base material 20 has: an insertion groove 22, into which the end 32 is inserted; an insertion hole 27, which is formed in the bottom of the insertion groove 22 and into which the extension 33 is inserted; and a clamping part, which clamps the extension 33 inserted into the insertion hole 27. The grip consists of a first wall part 23 and a second wall part 24, which constitute the insertion groove 22 and face each other. An elastic part 26, which is elastically deformable in the direction of making the first wall part 23 and second wall part 24 separate from each other, is formed on at least either one of the first wall part 23 and second wall part 24.

Description

  The present invention relates to a vehicle interior material.

  2. Description of the Related Art Conventionally, in vehicle interior materials such as door trims, the one described in Patent Document 1 is known in which a base material is covered with a skin material to enhance decorativeness. In this structure, a grained groove is formed in the base material constituting the door trim, and an opening is partially provided at the bottom of the grained groove. By pushing the end portion of the skin material into the wood groove and the opening, the aesthetic appearance on the design surface side is maintained without the end portion being visually recognized from the outside.

JP 2008-265747 A

  However, simply pushing the end portion of the skin material into the grained groove and opening causes some force to be applied, such as the body of the occupant coming into contact with the body part of the skin material, so that the terminal portion is designed from the grained groove and opening. There was a risk that the surface would be exposed and the appearance could be impaired. For this reason, it is conceivable to apply an adhesive to the terminal portion of the skin material and adhere the terminal portion of the skin material to the wood groove and the opening, but this is not preferable because it takes time to bond the terminal portion. Therefore, it is desired to suppress the bonding process, to improve the holding strength of the end portion of the skin material against the grained grooves, and to maintain the aesthetic appearance of the design surface.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a vehicle skin material capable of improving the holding strength of the skin material and maintaining the aesthetic appearance of the design surface. And

  The present invention is a vehicle interior material comprising an interior base material and a skin material covering the interior base material, wherein the skin material extends from a main body portion and a terminal portion of the main body portion. The interior base material is inserted into the insertion groove, the insertion groove into which the terminal portion is inserted, the insertion hole formed at the bottom of the insertion groove and into which the extension portion is inserted, and the insertion hole. A holding portion that holds the extending portion, and the holding portion includes first and second wall portions facing each other that form the insertion groove portion, and the first wall portion and the second wall portion. At least one of these is characterized in that an elastic portion is formed which can be elastically deformed in a direction in which the first wall portion and the second wall portion are separated from each other.

  With such a configuration, in the state where the end portion of the skin material is inserted into the insertion groove portion of the interior base material, the extending portion formed in the end portion is inserted into the insertion hole and is sandwiched by the sandwiching portion. Therefore, the holding strength of the terminal portion with respect to the insertion groove can be improved as compared with the case where the terminal is simply inserted into the insertion groove. As a result, even if a force is applied to the body portion of the skin material exposed on the design surface and a force for pulling out the terminal portion is applied, the extending portion extending from the terminal portion is sandwiched by the sandwiching portion. The extended portion is hardly pulled out to the side, and the terminal portion is hardly exposed. Thus, it becomes possible to maintain the aesthetic appearance of the design surface by adopting a configuration in which the terminal portion is not easily exposed to the design surface side of the vehicle interior material.

  The sandwiching portion uses the positional relationship between the first wall portion and the second wall portion facing each other in the insertion groove portion, and an elastic portion that can be elastically deformed in a direction away from the other is provided on one of the wall portions. Thus, the extending portion can be easily held in the insertion groove portion. That is, when the extension portion is inserted into the insertion hole, the elastic portion is elastically deformed in a direction away from the opposing first wall portion or second wall portion, and the extension portion is inserted, and then the elastic portion. Is elastically restored, and the extending portion is sandwiched between the first wall portion or the second wall portion facing each other. Therefore, since the extended portion can be inserted into the insertion hole and simultaneously held by the holding portion, the work of attaching the skin material to the interior base material can be facilitated.

  The interior base material includes a decorative portion covered by the main body portion, and the first wall portion is a side wall extending from the decorative portion toward the bottom portion of the insertion groove portion, and the first wall portion It is desirable that the elastic portion is formed. The terminal part located on the periphery of the main body part that covers the decoration part is naturally inserted into the insertion groove part so as to cover the first wall part extending from the decoration part, and is sandwiched by the clamping part. Therefore, with such a configuration, the elastic portion is covered by the terminal portion and cannot be seen from the design surface side, and it is possible to further improve the appearance of the design surface.

  The elastic portion includes an elastic piece formed between a pair of slits formed by cutting from the insertion hole toward the decorating portion side of the first wall portion, and the elastic piece is the second opposing portion. You may have the tongue piece part which protrudes toward a wall part. With such a configuration, the extended portion inserted into the insertion hole can be more firmly held by the tongue piece formed on the elastic piece, so that the holding strength of the terminal portion with respect to the insertion groove can be increased. Further increase is possible. Thus, the aesthetic appearance of the said design surface is maintainable by setting it as the structure which a terminal part is hard to expose by the design surface side.

  Also, the elastic part is made of an elastic piece formed by cutting and forming a pair of slits in the first wall part, so that it has a simpler structure than the elastic part is newly formed by another member. The terminal portion of the skin material can be held. In addition, since it becomes possible to adjust the degree of clamping according to the slit cutting depth and the protruding length of the tongue piece, the degree of clamping can be changed according to the material and thickness of the skin material, making it versatile. Excellent.

  The tongue piece portion is formed of a thin piece that bridges the insertion hole from the tip of the elastic piece to the second wall portion, and the extending portion is inserted into the insertion hole by breaking through the thin piece. Good. With such a configuration, the sharp tip portion of the thin-walled piece that has pierced bites into the extension portion, and the extension portion is provided between the elastic piece having the tongue piece portion made of this thin-wall piece and the second wall portion facing the elastic piece. Will be clamped more firmly. As a result, since the holding strength of the terminal portion with respect to the insertion groove portion is also improved, it is possible to effectively prevent the terminal portion from being exposed to the design surface, and thus the design surface of the vehicle interior material covered with the skin material. An aesthetic appearance can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the interior material for vehicles which can improve the holding | maintenance strength of a skin material and can maintain the beauty | look of a design surface can be provided.

The perspective view which showed typically the door trim which concerns on one Embodiment of this invention. A plan view schematically showing the skin material constituting the door trim Detailed perspective view of the door trim ornament viewed from the outside of the passenger compartment FIG. 3 is a detailed perspective view of the clamping portion of FIG. FIG. 3 is a detailed perspective view of the clamping portion shown in FIG. 3 as viewed from the second wall side. Typical sectional drawing which showed the state before inserting a skin material into a graining groove in the AA cross section of FIG. Schematic sectional view showing the state after inserting the skin material into the grained groove in the AA cross section of FIG. Typical sectional drawing which showed the state after inserting the skin material of a prior art example into a grained groove Typical sectional drawing which showed the state after inserting the skin material which concerns on other embodiment in the graining groove | channel.

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS.
The vehicle interior material of this embodiment has illustrated the case where it applies to the door trim 10 attached to a vehicle door. As shown in FIG. 1, the door trim 10 includes a plate-like base material 20 and a skin material 30 that covers an ornamental portion 21 of the base material 20. Hereinafter, the front side in FIG. 1 will be described as the front side (vehicle interior side, design surface side), and the back side of the paper surface will be described as the back side (vehicle interior side). 1 and 2 (the accompanying FIGS. 6 and 7) schematically show the configuration of the door trim 10 or the skin material 30, and do not show an accurate dimensional relationship.

  The base material 20 is made of a thermoplastic synthetic resin, and is obtained, for example, by molding a polyolefin resin such as polypropylene into a plate shape. As shown in FIG. 1, the base 20 is formed with an armrest 11 that projects to the front side, and is further provided with a speaker grill 12, a door pocket 13, and the like.

  Of the plate surface constituting the front side (vehicle compartment side) of the base material 20, an area having a substantially rectangular shape in plan view above the armrest 11 is an ornament part 21 corresponding to a decoration part. Further, the base material 20 is formed with a wood grain groove 22 (corresponding to an insertion groove portion) surrounding the ornament portion 21 over the entire circumference, and a main body portion 31 of a skin material 30 described later covers the ornament portion 21, The skin material 30 is attached to the base material 20 by the terminal portion 32 of the material 30 being pushed into the wood groove 22.

  Although not shown, the skin material 30 is composed of a surface layer exposed on the vehicle interior side and a cushion layer laminated on the surface layer and disposed on the base material 20 side. The material of the surface layer can be appropriately selected from (synthetic) resin, (synthetic) leather, fiber, and the like, and the material of the cushion layer is exemplified by a foamed resin material such as slab urethane. The skin material 30 has a sheet shape as shown in FIG. 2, and has a substantially rectangular shape with the same shape that is slightly larger than the surface area of the ornament portion 21. Among these, the part pasted in a state of being superimposed on the ornament part 21 is the main body part 31, and the part that is the peripheral part of the main body part 31 and is inserted into the wood groove 22 is the outer side from the terminal part 32 and the terminal part 32. The part extended in the direction is an extended part 33. A plurality of extending portions 33 are formed at predetermined intervals along the circumferential direction of the terminal portion 32, and each extending portion 33 has a belt-like shape extending outward from the outer peripheral edge portion of the terminal portion 32 serving as a forming position. There is no. As will be described in detail later, since the extended portion 33 is inserted into the insertion hole 27 formed in the wood groove 22, the extension portion 33 is inserted into the insertion hole 27, so that the skin material 30 Positioning with respect to the ornament part 21 will be made.

  Next, the configuration of the wood groove 22 will be described in detail with reference to FIGS. 3 to 5 are views showing the configuration of the door trim 10 in more detail. FIG. 3 is a detailed perspective view of the door trim 10 as seen from the outside (back side) of the passenger compartment. FIGS. 4 and 5 are the same as FIG. FIG. 5 is a detailed enlarged perspective view of the door trim 10 as viewed from the outside of the passenger compartment, that is, when the grained groove 22 is viewed from the bottom 22A side, and particularly shows the configuration of the clamping portion 28. 3 exemplifies a mode in which the sandwiching portion 28 is formed only in part, but in actuality, it is assumed that a plurality of the sandwiching portions 28 are formed corresponding to the extended portions 33 of the skin material 30.

  The wood groove 22 is recessed from the peripheral part of the ornament part 21 having a flat surface on the front and back sides toward the back side. Specifically, as shown in FIG. 3, a pair of side walls protrude from the rear surface 21 </ b> A of the ornament portion 21 toward the vehicle compartment outer side (the front side in FIG. 3). A bottom portion 22 </ b> A connecting the protruding ends of the ornament portion 21 is formed along the periphery of the back surface 21 </ b> A of the ornament portion 21. As shown in FIGS. 4 and 5, the pair of side walls are formed on the first wall portion 23 and the first wall portion 23 that extend from the peripheral edge portion of the ornament portion 21 (back surface 21 </ b> A) toward the bottom portion 22 </ b> A of the wood groove 22. It is comprised from the 2nd wall part 24 which opposes. As shown in FIG. 6, the wood groove 22 has a substantially trapezoidal cross section in which the width dimension between the first wall portion 23 and the second wall portion 24 becomes narrower toward the bottom portion 22 </ b> A (back side).

  As shown in FIGS. 3 to 5, the first wall portion 23 is formed with a plurality of pairs of slits 25 formed by cutting from the bottom side, and an elastic piece 26 is formed between each pair of slits 25. Yes. Since each elastic piece 26 sandwiches the extended portion 33 of the inserted skin material 30, the pair of slits 25 and the elastic piece 26 therebetween are formed corresponding to the interval between the extended portions 33. ing.

  As shown in FIGS. 4 to 6, the elastic piece 26 cut out from the first wall portion 23 by the slit 25 extends in a cantilevered manner toward the bottom portion 22 </ b> A side in the same direction as the other first wall portion 23. The tip is a claw portion 26A (corresponding to a tongue piece portion) that bends and extends toward the second wall portion 24 side. The claw portion 26 </ b> A has a shape that tapers toward the second wall portion 24, and a tip portion thereof is a thin portion 26 </ b> B (corresponding to a thin piece) that is continuous with the second wall portion 24. An insertion hole 27 into which the extending portion 33 of the skin material 30 is inserted is formed in the bottom portion 22A corresponding to the elastic piece 26 and the slits 25 at both ends thereof. Here, the thin-walled portion 26B described above has a form in which a thin film is stretched from the tip of the claw portion 26A to the opposing second wall portion 24 so as to bridge the insertion hole 27.

  In the state where the skin material 30 is attached to the base material 20, as shown in FIG. 7, the extending portion 33 is inserted into the insertion hole 27 so as to pierce the thin portion 26 </ b> B, and the end portion thereof is the base material 20. It is arranged on the back side. The pierced thin-walled portion 26B has a sharp tip, and the thin-walled portion 26B is formed at the tip of the claw portion 26A of the elastic piece 26. Therefore, the extending portion 33 is opposed to the elastic piece 26. It is sandwiched between the wall portion 24 and the sharp thin-walled portion 26B at the tip thereof is in a state of being bitten from both the front and back surfaces of the extending portion 33. Thus, the clamping part 28 of this invention is comprised by the elastic piece 26 formed in the 1st wall part 23, and the 2nd wall part 24 which opposes it.

  The present embodiment is configured as described above, and the operation and effect will be described subsequently. In order to attach the skin material 30 to the base material 20, first, after applying an adhesive on the surface of the ornament portion 21 (or the ornament portion 21 side of the body portion 31 of the skin material 30), the body portion 31 of the skin material 30 is attached. Crimp with a press. Subsequently, the terminal portion 32 and the extending portion 33 projecting around the main body portion 31 are pushed into the wood-grooving groove 22 by a pushing blade that can be inserted into the wood-groove groove from the front side. As the pressing blade, for example, a blade having a plate thickness of about 0.7 mm is used, and each pressing blade is installed so as to be inserted into the insertion hole 27 of the base material 20.

  Explaining in detail this pushing step, first, as shown in FIG. 6, the terminal portion 32 placed on the surface of the substrate 20 and the extending portion 33 connected thereto are pushed into the wood groove 22 from above by the pushing blade. . Then, it will be in the state by which all the terminal parts 32 were pushed in into the graining groove | channel 22. Subsequently, when the extension portion 33 is pushed in by the pushing blade, the elastic piece 26 protruding toward the second wall portion 24 is elastically deformed in a direction away from the second wall portion 24, and the elastic piece 26 and the second wall The extending portion 33 is inserted between the portion 24 and the pushing blade.

  When the extended portion 33 is further pushed in by the pushing blade, it hits the thin wall portion 26B connected to the second wall portion 24 from the tip of the claw portion 26A of the elastic piece 26, and the extending portion 33 pressed by the pushing blade breaks through. . Then, the tip of the pierced thin portion 26B has a sharp shape, so that it bites into the front and back surfaces of the extended portion 33 that has been pushed in. In FIG. 7, the case where the broken thin portion 26 </ b> B remains on both the claw portion 26 </ b> A and the second wall portion 24 is illustrated for easy understanding of the manner in which the thin portion 26 </ b> B is broken through. It is desirable to insert the pushing blade along the second wall portion side so that all 26B remains on the claw portion 26A side. This is because the thinned portion 26B of the cushion layer disposed on the base material 20 side of the skin material 30 is easier to bite than the surface layer, and the extended portion 33 can be held more firmly.

  Finally, when only the pushing blade is pulled out, the extended portion 33 inserted into the insertion hole 27 is held in a state in which the end portion protrudes to the back side of the base material 20, and the elastic piece 26 is elastically restored, thereby extending the extension. The installation portion 33 is maintained in a state of being sandwiched between the elastic piece 26 and the second wall portion 24 facing the elastic piece 26. Thus, the work for attaching the skin material 30 to the base material 20 is completed.

  As described above, according to the present embodiment, the extended portion 33 formed in the terminal portion 32 is inserted into the insertion hole 27 in a state where the terminal portion 32 of the skin material 30 is inserted into the wood groove 22 of the base material 20. And is sandwiched between the elastic piece 26 and the second wall portion 24 facing the elastic piece 26. Thereby, the holding | maintenance intensity | strength of the terminal part 32 with respect to the graining groove | channel 22 can be improved.

  That is, when the terminal portion 2 of the skin material 1 is simply inserted into the wood groove 4 of the base material 3 as illustrated in FIG. The design surface is drawn out to the vehicle interior side, and the aesthetic appearance of the design surface may be impaired. Further, the terminal portion 2 is exposed on the design surface, so that the main body portion 6 adhered to the ornament portion 5 may be peeled off from the terminal portion 2.

  On the other hand, in this embodiment, as shown in FIG. 7, since the extending portion 33 is sandwiched between the elastic piece 26 and the second wall portion 24 facing, nothing is described above. Compared with the case where there is no, the holding strength with respect to the wood groove 22 of the terminal part 32 where the extended part 33 continues can be increased. Thereby, it is possible to prevent the terminal part 32 pushed into the wood grain groove 22 from being pulled out, and to reduce the possibility that the main body part 31 connected to the terminal part 32 is peeled off from the ornament part 21 of the base material 20. It is possible to maintain the aesthetic appearance of the ten design surfaces.

  The sandwiching portion uses the positional relationship between the first wall portion 23 and the second wall portion 24 facing each other in the wood groove 22, and a pair of slits 25 are cut and formed in the first wall portion 23. 26 is formed, and the elastic piece 26 and the second wall portion 24 facing each other are formed. Therefore, it is possible to easily form the clamping portion using the existing configuration. For example, it is simpler than the case where a separate clamping structure is provided without using the first wall portion 23 and the second wall portion 24. The end portion of the skin material can be held with a simple structure. Further, in the clamping procedure of the present embodiment, when the extending portion 33 is inserted into the insertion hole 27, the elastic piece 26 is elastically deformed in a direction away from the opposing second wall portion 24, and the extending portion 33. After that, the elastic piece 26 is elastically restored, so that the extending portion 33 is sandwiched between the second wall portion 24 and the opposing second wall portion 24. In this way, by using the elastic force of the elastic piece 26, the attachment work of the skin material 30 to the base material 20 is not particularly changed even if a clamping portion such as the elastic piece 26 is added, and easily. Applicable.

  Moreover, since the elastic piece 26 is formed in the 1st wall part 23 covered with the terminal part 32 of the skin material 30, the elastic piece 26 is not exposed to the vehicle interior side used as the design surface side, and is good-looking It can be.

  In addition, the claw portion 26A that bends and extends toward the second wall portion 24 facing the end portion of the elastic piece 26 does not have, for example, the claw portion 26A along the extending direction of the first wall portion 23. Rather than using an elastic piece, the clamping force can be improved. Further, in the present embodiment, the burr-like thin portion 26 </ b> B continuous from the tip of the claw portion 26 </ b> A to the second wall portion 24 is provided, so that the holding force for the elastic piece 26 is improved. That is, when the extending portion 33 is inserted into the insertion hole 27, the thin portion 26B is pierced with the pushing blade, so that the tip of the thin portion 26B has a sharp shape. When the thin portion 26B having the sharp tip portion bites into the extending portion 33, the holding force of the extending portion 33 with respect to the elastic piece 26 having the thin portion 26B is improved. In addition, when the extension part 33 once bitten by the thin part 26B is pulled out to the front side by pulling the main body part 31 or the terminal part 32, the thin part 26B further bites deeply into the extension part 33. Thus, the holding force of the extended portion 33 with respect to the thinner portion 26B (elastic piece 26) is increased. Due to the configuration in which the thin portion 26B is broken through and the extended portion 33 is bitten at the tip, the holding force of the extended portion 33 to the elastic piece 26 itself is increased, and the second wall portion opposed by the claw portion 26A. The force pinched with 24 can also be made strong. Therefore, the holding strength with respect to the wood groove 22 of the terminal portion 32 connected to the extended portion 33 is also reliably improved, and the aesthetic appearance of the design surface of the door trim 10 can be maintained.

  Moreover, the elastic piece 26 which clamps the extending part 33 can adjust the clamping degree by changing the cutting depth of the slit 25, and the protrusion length of 26 A of claw parts. Therefore, according to the material and thickness of the skin material 30, the clamping degree can be changed and it can be excellent in versatility.

<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 above-described embodiment, the claw portion 26A is provided at the distal end of the elastic piece 26, and the thin wall portion 26B connected to the second wall portion 24 facing the distal end is illustrated. However, the present invention is not limited to this. For example, as shown in FIG. 9, the elastic piece 40 extends toward the second wall portion 24, and is spaced from the second wall portion 24 by a predetermined distance again (the ornament portion 21). It is good also as what has a V-shaped front-end | tip part bent to the side. According to such a configuration, the extended portion 33 can be sandwiched between the elastic piece 40 and the second wall portion 24 facing it without damaging the surface of the extended portion 33 of the skin material 30.

  (2) In the above-described embodiment, the claw portion 26A of the elastic piece 26 has a shape that narrows toward the tip, but is not limited thereto, and may have a constant plate thickness. Moreover, although the case where the thin part 26B was provided in the front-end | tip of the nail | claw part 26A was illustrated, it is not restricted to this, The thing without the thin part 26B may be sufficient, In this case, the claw part 26A and the 2nd wall It is desirable that the extended portion 33 of the skin material 30 be separated from the portion 24 so that the extended portion 33 can be sandwiched.

  (3) In the above-described embodiment, the elastic piece 26 is formed on the first wall portion 23. However, the elastic piece 26 is not limited to this. For example, the elastic piece 26 may be formed on the second wall portion 24, or the first wall portion. 23 and the second wall portion 24 may be alternately formed.

  (4) In the above-described embodiment, the wood-grooved groove 22 is recessed toward the back side direction orthogonal to the plate surface of the ornament portion 21, but is not limited to this, and is not limited to the plate surface of the ornament portion 21. And may be formed with an inclination that forms an acute angle or an obtuse angle. If it is set as such a structure, it will become difficult to visually recognize the inside of the graining groove | channel 22 from the design surface side, and a door trim with better appearance can be provided.

  (5) In the above-described embodiment, the grained groove 22 includes the first wall portion 23 and the second wall portion 24, and the bottom portion 22A that connects the first wall portion 23 and the second wall portion 24. Although the insertion hole 27 is formed, the formation position with respect to the bottom part of the insertion hole is not limited. For example, the insertion hole may be formed so as to be biased to one of the first wall part 23 and the second wall part 24. In addition, an insertion hole may be formed at a substantially central portion of the bottom portion 22 </ b> A so as to be equidistant from the first wall portion 23 and the second wall portion 24. Moreover, the bottom may be provided in a part of the first wall 23 or the second wall 24. For example, if the bottom is provided on the first wall 23, the bottom is the second wall. It may form a positional relationship facing the portion 24. In this case, since the insertion hole is formed in the bottom portion provided on the first wall portion 23, the insertion hole opens on the first wall portion 23. Similarly, a bottom portion may be formed on the second wall portion 24, and an insertion hole may be substantially formed on the second wall portion 24.

  (6) In the above-described embodiment, the door trim is exemplified as the vehicle interior material. However, the present invention is not limited to the door trim, and may be a vehicle interior material such as an instrument panel and a pillar trim.

10 ... Door trim 20 ... Base material (interior base material)
21 ... Ornament 22 ... Grain groove (insertion groove)
22A ... Bottom 23 ... First wall 24 ... Second wall 25 ... Slit 26 ... Elastic piece (elastic part)
26A ... Claw (tongue piece)
26B ... Thin part 27 ... Insertion hole 28 ... Clamping part 30 ... Skin material 31 ... Main body part 32 ... Terminal part 33 ... Extension part

Claims (4)

An interior substrate;
A vehicle interior material comprising a skin material covering the interior base material,
The skin material has a main body part and an extending part extending from a terminal part of the main body part,
The interior base material sandwiches the insertion groove portion into which the terminal portion is inserted, the insertion hole formed at the bottom of the insertion groove portion into which the extension portion is inserted, and the extension portion inserted into the insertion hole. And a clamping part
The clamping part is composed of a first wall part and a second wall part facing each other that constitute the insertion groove part, and at least one of the first wall part and the second wall part includes the first wall part and the second wall part. An interior material for a vehicle, wherein an elastic portion that is elastically deformable in a direction in which the second wall portions are separated from each other is formed. The interior base material includes a decorative portion that is covered with the main body portion,
The said 1st wall part is a side wall extended toward the said bottom part of the said insertion groove part from the said decorating part, Comprising: The said elastic part is formed in this 1st wall part. Vehicle interior materials. The elastic part is composed of an elastic piece formed between a pair of slits formed by cutting from the insertion hole toward the decoration part side of the first wall part,
The vehicular interior material according to claim 2, wherein the elastic piece has a tongue piece portion projecting toward the second wall portion facing the elastic piece.   The tongue piece portion is a thin piece that bridges the insertion hole from the distal end portion of the elastic piece to the second wall portion, and the extension portion is inserted into the insertion hole by breaking through the thin piece. The vehicle interior material according to claim 3.

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