WO2016098827A1

WO2016098827A1 - Multilayer composite interior component

Info

Publication number: WO2016098827A1
Application number: PCT/JP2015/085270
Authority: WO
Inventors: 長武宮下; 健二大沼; 研一吉田
Original assignee: 豊田鉄工株式会社
Priority date: 2014-12-19
Filing date: 2015-12-16
Publication date: 2016-06-23

Abstract

Provided is a multilayer composite interior component in which boundary protrusions (20b) aligned in a row on both sides of a parting line (L) are arranged in a staggered manner so as to bend toward the boundary protrusions (20b) in the row opposite thereto. In this way, even when the boundary protrusions (20b) are separated from the parting line (L) by a predetermined distance (g1, g2) in order to maintain the strength of a divided mold, the boundary protrusions (20b) bend and deform so as to fill in an empty part in the vicinity of the parting line (L) when a surface layer member (16) is pressed by fingers or a hand. As a result, a feeling of unevenness resulting from decreases in reaction force in the vicinity of the parting line (L) is minimized, thus making it possible to obtain a more uniform texture.

Description

Stacked composite interior parts

The present invention relates to an overlaid composite interior part.

Conventionally, there has been known a composite interior part having a first member having a predetermined mating surface and a second member made of synthetic resin which is superposed on the first member and can be elastically deformed. The second member has a plate-like portion substantially parallel to the mating surface of the first member. The plate-like portion is provided with a plurality of protrusions that protrude toward the mating surface so as to form a space with the mating surface of the first member. The composite interior part is imparted with cushioning properties by the tip of the protrusion of the second member being pressed against the mating surface of the first member and elastically deforming. In the superposed composite component described in Patent Document 1, variation in tactile sensation when pressed with a finger or hand is suppressed by controlling the direction of bending of the protrusion.

However, conventional laminated composite parts sometimes have irregularities when pressed with a finger or hand because the tactile sensation is partially different for the following reasons. That is, in the case of a complex component having a large and complex shape, a mold for molding the protruding surface of the second member is formed by taking into account the releasability of the mold for the second member and maintenance of the mold. It may be divided into two parts. In this case, in order to ensure the strength of the split mold, it is difficult to provide a protrusion near the edge of the split mold. For this reason, blank portions having no protrusions are formed in the vicinity of a plurality of divided parting lines, that is, parting lines. As a result, the composite part has a portion where an appropriate reaction force cannot be obtained when pressed with a finger or hand, and a uniform tactile sensation cannot be obtained.

12A and 12B are plan views of the second member 104 viewed from the protrusion 102. FIG. The second member 104 has a plate-like portion 100 and a plurality of protrusions 102 provided on the plate-like portion 100. Each of the plurality of protrusions 102 has the same shape and is inclined in the direction of the arrow in FIG. The plurality of protrusions 102 are arranged on each side of a regular hexagonal lattice pattern 106 having a honeycomb shape indicated by a two-dot chain line, and alternately face in opposite directions. According to this configuration, when a load is applied to the plate-like portion 100 from the vertical direction, each protrusion 102 bends as shown by the oblique lines in FIG. The reaction force at this time gives a substantially uniform tactile feel to the composite part. However, when a composite part is formed using a plurality of divided molds, the protrusion 102 is thinned out in the vicinity of the dividing lines L of the plurality of divided molds to ensure the strength of the divided molds. Power cannot be obtained. In this regard, the second member 104 was turned over, and the pressing piece was pressed vertically from the plate-like portion 100, and the reaction force characteristics at points A and B shown in FIG. The tip of the pressing piece is formed in a circular shape having a diameter of 14 mm. As a result, as shown in FIG. 13, when the stroke of the pressing piece was 2 mm, the reaction force difference ΔF between the points A and B was 8N or more. A shaded portion in FIG. 12A is a pressing area by a pressing piece having a diameter of 14 mm, and indicates a size corresponding to a human fingertip.

WO2013 / 132676

An object of the present invention is to provide an overlapped composite interior part in which a decrease in reaction force near the parting line is suppressed and variation in tactile sensation is suppressed to a small level.

In order to solve the above problems, according to a first aspect of the present invention, there is provided a composite interior part comprising a first member and a second member superimposed on the first member. The second member is formed using a plurality of split molds, and the second member includes a plurality of general protrusions that project toward the first member and bend by contact with the first member, and a plurality of split molds. A plurality of boundary protrusions are provided between the line and the general protrusion and protrude toward the first member and bend by contact with the first member. The plurality of boundary protrusions are arranged at equal intervals on both sides of the parting line so as to form a row along the parting line. The interval between the boundary projections is shorter than the distance between the adjacent general projections along the parting line.

According to this configuration, the boundary protrusions can be arranged in the vicinity of the parting line at a higher density than the conventional overlapping composite interior part in which the general protrusions near the parting line are thinned out. For this reason, the reduction of the reaction force in the vicinity of the parting line is suppressed. As a result, it is possible to reduce variations in tactile sensation when the second member is pressed in the vicinity of the parting line and in other parts.

In the above composite composite interior part, the second member has a protruding surface from which the boundary protrusion protrudes, and the boundary protrusion is inclined to the parting line with respect to the normal line perpendicular to the protruding surface of the second member It is preferable that it protrudes.

According to this configuration, the boundary protrusion is bent so as to fall down to the parting line by contact with the first member. As a result, an elastic force due to the flexure-deformed protrusion acts near the parting line. Therefore, a reduction in reaction force in the vicinity of the parting line is suppressed.

In the above-described composite composite interior part, it is preferable that the boundary protrusions are provided on both sides of the parting line, and one of the boundary protrusions on both sides of the parting line does not face the other boundary protrusion.

According to this configuration, when one boundary projection on both sides of the parting line is bent and deformed, it easily enters between the other adjacent boundary projections. Thereby, compared with the case where a boundary protrusion is provided on both sides of the parting line, the reaction force received by the boundary protrusion due to contact with the first member can be dispersed. Therefore, the feeling of unevenness in the vicinity of the parting line is suppressed.

In the above composite composite interior part, the second member has a design surface on the side opposite to the general protrusion and the boundary protrusion, and the boundary protrusion is provided at a position separated from the parting line by a first distance. A first protrusion and a second protrusion provided at a position separated from the parting line by a second distance that is different from the first distance. The first protrusion and the second protrusion include When viewed from the line, they are preferably arranged alternately.

According to this configuration, the boundary protrusions are alternately provided at a position close to the parting line and a position away from the parting line. Thereby, in the 2nd member, the site | part with a large thickness by protrusion is not arranged in a straight line. Therefore, uneven gloss is less likely to occur on the design surface.

In the above-described composite composite interior part, the general protrusion and the boundary protrusion are formed of a cone whose outer shape gradually decreases from the proximal end portion toward the distal end portion, and the sectional shape of the proximal end portion is longer than the length in a specific direction. It is preferable that the length in the perpendicular direction perpendicular to the specific direction is large and line symmetric.

According to this configuration, the deflection direction of the general protrusion and the boundary protrusion due to the contact with the first member is fixed in a specific direction from the relationship of the cross-sectional second moment. That is, the general protrusion and the boundary protrusion can always be bent and deformed in the same manner. For this reason, it can suppress that a tactile sensation changes with the load which presses a 2nd member.

In the above-described overlapped composite interior part, the boundary protrusion is directed to the third protrusion arranged facing the first direction that is separated from the parting line and the second direction adjacent to the parting line. A first protrusion and a second protrusion, both of the first and second directions being a specific direction, the second direction being a direction intersecting the first direction, and a third direction. The protrusions and the fourth protrusions are preferably arranged alternately when viewed from the parting line.

According to this configuration, since the directions of the base end portions of the third and fourth protrusions are different, the line segments connecting the base end portions of the third and fourth protrusions are arranged in a zigzag manner. That is, in the second member, the portions where the thickness due to the protrusion is large are not arranged in a straight line. For this reason, unevenness is less likely to occur on the design surface. In this case, the line segment connecting the contact points between the third protrusion and the fourth protrusion and the first member is also arranged in a zigzag manner. In other words, the contact points are not concentrated near the parting line as compared with the case where the line segments connecting the contact points are arranged in a straight line. Thereby, the repulsive force accompanying the bending deformation of the boundary protrusion is dispersed. Therefore, the feeling of unevenness in the vicinity of the parting line is suppressed.

In the above superimposed composite interior part, the plurality of polygons form a lattice pattern by superimposing their sides with the sides of adjacent polygons, and the plurality of general protrusions are provided on each side of the polygon. It is preferable that

According to this configuration, variation in tactile sensation when the second member is pressed with a finger or hand can be suppressed, and an excellent tactile sensation with little unevenness can be obtained together with the boundary protrusions in the vicinity of the parting line.
In the above composite composite interior part, the general protrusion is provided on the plate-like portion of the second member arranged in parallel with the mating surface of the first member, and the general protrusion is applied from a direction perpendicular to the plate-like portion. The bending rigidity with respect to the load has anisotropy around the axis perpendicular to the plate-like part, and the general protrusion is configured to bend in one direction around the axis while sliding the tip part with respect to the mating surface. The lattice pattern is a honeycomb shape in which regular hexagons of a certain size are repeated continuously.General projections are arranged one on each side of the regular hexagon, and the deflection direction of the general projections is around the center of the regular hexagon. In each piece, it is preferable to change alternately inward and outward.

According to this configuration, the general protrusions can be arranged with a high density and a change in the posture of the general protrusions corresponding to each side of the regular hexagon. Therefore, a more uniform tactile sensation can be obtained.
In order to solve the above-described problem, according to a second aspect of the present invention, the first member having a predetermined mating surface and the second member made of an elastically deformable synthetic resin superimposed on the first member are provided. Overlapped composite interior parts are provided. The second member has a plate-like portion that is substantially parallel to the mating surface, and the plate-like portion is provided with a plurality of protrusions that project toward the mating surface so as to form a space between the second surface and the mating surface. . The second member is overlapped with the first member in a state where the tip end portion of the protrusion is in contact with the mating surface. A cushioning property is imparted to the overlapped composite interior part by the elastic deformation of the tip of the protrusion against the mating surface. The protrusion-side surface of the second member is molded using a plurality of split dies. Boundary protrusions provided on both sides of the split mold parting line are aligned at equal intervals along the mold parting line. In the boundary protrusion, the bending rigidity with respect to the load applied from the direction perpendicular to the plate-like portion has anisotropy around the axis perpendicular to the plate-like portion. The boundary protrusion is configured to bend in one direction around the axis while sliding the tip portion relative to the mating surface. The boundary protrusions aligned on both sides of the parting line are provided so as to bend toward the boundary protrusions of the opposite rows. The boundary protrusions are disposed in the middle part of the adjacent boundary protrusions in the opposite row, and are disposed in a staggered manner.

According to this configuration, even when the boundary protrusion is separated from the parting line by a predetermined dimension in order to ensure the strength of the split mold, when the second member is pressed with a finger or a hand, the boundary protrusion is near the parting line. It bends and deforms to fill in the blank part. Thereby, since the unevenness | corrugation by the fall of the reaction force near a parting line is suppressed, a uniform tactile sensation is obtained.

In the above-mentioned composite composite interior part, the boundary protrusion has the same shape, and the center line of the boundary protrusion is inclined with respect to the direction perpendicular to the plate-shaped part at the base end portion of the boundary protrusion. The boundary protrusions on both sides of the parting line are preferably aligned in parallel so that the inclination directions of the boundary protrusions in each row are the same.

According to this structure, a recessed part can be easily processed into the shaping | molding die which shape | molds a boundary protrusion. Therefore, the manufacturing cost including the production of the mold can be reduced.
In the overlapped composite interior part, a plurality of general protrusions are provided in a general region spaced apart from the parting line in the second member, and the plurality of polygons are adjacent to the sides of the adjacent polygons. It is preferable that a lattice pattern is formed by superimposing and the plurality of general protrusions are provided on each side of the polygon.

According to this configuration, variation in tactile sensation when the second member is pressed with a finger or hand can be suppressed, and an excellent tactile sensation with little unevenness can be obtained together with boundary protrusions in the vicinity of the parting line.
In the above superimposed composite interior part, the general protrusions have the same shape, and the general protrusion has an anisotropic bending rigidity with respect to the load applied from the direction perpendicular to the plate-like part around the axis perpendicular to the plate-like part. The general projection is configured to bend in one direction around the axis while sliding the tip part relative to the mating surface, and the lattice pattern is a regular hexagonal shape with a constant size that repeats continuously. It has a honeycomb shape, and one general protrusion is arranged on each side of the regular hexagon. The bending direction of the general protrusion alternately changes inward and outward on each side around the center of the regular hexagon. It is preferable.

According to this configuration, the general protrusions can be arranged with a high density and corresponding to each side of the regular hexagon, by changing the posture of the general protrusions. Therefore, a more uniform tactile sensation can be obtained.

The front view which looked at the upper end part of the door trim for vehicles which has the ornament which is one Example of this invention from the vehicle interior. FIG. 2 is a sectional view taken along line II-II in FIG. Sectional drawing of the shaping | molding die which shape | molds the surface layer member of an ornament. (A) is a top view of the surface layer member at the time of non-pressing, (b) is a top view of the surface layer member at the time of pressing. FIG. 5 is a longitudinal sectional view taken along line VV in FIG. FIG. 6 is a longitudinal sectional view taken along line VI-VI in FIG. 5. The perspective view of protrusion. The graph which shows the relationship between the load and reaction force in point A, B, C of Fig.4 (a). (A) and (b) are the top views of the surface layer member which concerns on another Example. Sectional drawing which shows the other Example which adhered the skin material to the surface layer member. Sectional drawing which shows the other Example in which the 1st member is a surface layer member and the 2nd member is being fixed to the base material. (A) is a top view of the 2nd member of the conventional overlapping composite interior part at the time of non-pressing, (b) is a top view which shows the deformation | transformation shape of each protrusion at the time of a press. The graph which shows the relationship between the pressing load and reaction force in the points A and B of Fig.12 (a). (A) is a top view of the surface layer member of 2nd Example at the time of non-pressing, (b) is a top view of the surface layer member at the time of pressing. (A) is a top view of the surface layer member which concerns on the modification of 2nd Example at the time of non-pressing, (b) is a top view of the surface layer member at the time of a press.

The embodiments described later are applied to interior parts for vehicles such as door trims, luggage side trims, instrument panels, ornaments and armrests attached to the interior parts, but are applied to panel parts other than those for vehicles. . Moreover, the Example mentioned later is applied not only to a plate-shaped panel component but also to a first component having a three-dimensionally curved three-dimensional shape or a three-dimensional component in which a second member is superimposed on the surface of a substrate. . When the first member is used as a base material, a relatively hard synthetic resin material such as hard polyvinyl chloride, polypropylene, polyethylene, and ABS is preferably used. When the first member is used as a surface layer member, various thermoplastic resins such as soft polyvinyl chloride, styrene, olefin, and polyester are suitably used as the resin material for the second member. A skin material can also be attached to the surface layer member. For example, various skin materials such as soft polyvinyl chloride and various thermoplastic resins such as styrene, olefin, and polyester, as well as woven and non-woven fabrics, knitted fabrics, vinyl chloride, and soft films can be used as the skin material. It can also be adopted. When the first member is used as a surface layer member, a relatively hard base material can be provided on the back surface of the second member opposite to the protrusion, if necessary.

As the plurality of protrusions, for example, flat protrusions having a longitudinal shape such as a rectangular cross section parallel to the plate-like portion are preferably used. However, the cross-sectional shape of the protrusion may be a square, a circle, an ellipse, a curved shape curved in an arc shape, or the like. Each protrusion may be formed in a tapered shape having a cross-sectional area that decreases toward the tip. Moreover, you may change continuously the cross-sectional shape of the protrusion direction of each protrusion. The plurality of protrusions are desirably provided at predetermined intervals according to the protrusion height so that they do not interfere with each other during bending deformation. In addition, a plurality of protrusions can be provided so that the protrusions interfere with each other in the deformation stage. In the present specification, the term “projection” simply includes both boundary projections and general projections.

The boundary protrusion is configured to bend in one direction around the axis perpendicular to the plate-like portion. The boundary projection has, for example, an asymmetrical vertical cross section, and is configured to bend while sliding in one direction by pressing the tip portion against the mating surface. Although it is desirable that all the boundary projections have the same shape, a plurality of types of boundary projections having different shapes may be mixed. The boundary protrusions are provided on both sides of the parting line so as to bend toward the opposing boundary protrusions, for example, in a direction orthogonal to the parting line. Further, the bending direction of the boundary protrusion does not need to be perpendicular to the parting line, and it is sufficient that it intersects at least the parting line. In addition, the boundary protrusions on both sides of the parting line are preferably aligned in parallel with the same bending direction. However, the boundary protrusions may be arranged in different phases to shift the phase around the axis. Is possible. The dividing line, that is, the edge shape of the split mold, can be a curved shape such as a curved line in addition to a straight line.

It is desirable that the general projection be configured to bend in one direction around the axis perpendicular to the plate-like portion, like the boundary projection. The general protrusion has, for example, an asymmetrical vertical cross section, and is configured to bend while sliding in one direction by pressing the tip portion against the mating surface. However, protrusions having a cylindrical shape, a conical shape, or the like having a symmetrical longitudinal cross section, a protrusion having a prism shape, a pyramid shape, or the like can be used as the general protrusion. The boundary protrusions and the general protrusions can all be the same shape.

When the width dimension of the split mold is narrow, only the boundary protrusions need be provided on both sides of the split mold, and the general protrusions may be provided as necessary. In this case, for example, the general protrusions are desirably provided on each side of each polygon forming the lattice pattern, but may be provided at intersections in the lattice pattern, or may be randomly arranged without regularity. For example, a regular pattern such as regular triangles, squares, regular hexagons, etc. of the same shape is repeated continuously, but rectangular patterns, rhombuses, parallelograms, unequal triangles, unequal hexagons, etc. are continuous. It may be repeated repeatedly. Also, a lattice pattern in which a plurality of types of polygons are regularly repeated or a lattice pattern in which a plurality of types of polygons are irregularly adjacent may be used.

For example, two or more general protrusions can be arranged on each side of a polygon. In the case of a rectangle or parallelogram having different lengths on each side of the polygon, the number of general protrusions may be different between the long side and the short side. When the cross section of the general protrusion is a longitudinal shape, the longitudinal direction of the cross section of the general protrusion may be arranged in parallel or perpendicular to the polygonal side, and at a predetermined angle. You may arrange | position so that it may cross | intersect. Depending on the position of the general protrusions in the lattice pattern, the longitudinal direction of the general protrusions may be parallel or orthogonal to the sides of the polygon.

The protrusion has the center line inclined at a constant inclination angle α with respect to the normal of the plate-like part from the base end portion to the tip end portion, but the inclination angle α may be changed continuously or stepwise. . Further, the protrusions may be arranged in the vicinity of the base end portion in parallel with the normal line of the plate-like part, and only the vicinity of the tip end portion of the protrusion may be inclined with respect to the normal line. That is, a part of the protrusion may be a vertical part parallel to the normal line of the plate-like part. In the case of a protrusion perpendicular to the plate-like portion, a step may be provided on one side wall of the longitudinal section, and the tip portion may be left on the side opposite to the step. In this case, when a load is applied in the axial direction, an uneven load is applied to the tip portion, so that the tip portion slides to the side opposite to the step, and the entire protrusion is bent and deformed. Further, instead of the step, an inclined surface may be provided on one side wall of the longitudinal section.

The embodiments described later are preferably applied to plate-like panel parts. Specifically, the second member is a surface layer member, the first member is a plate-like base material made of a resin material harder than the second member, and the surface of the base material functions as a mating surface. Is attached to the surface of the base material. In this case, in the surface layer member, a three-layer structure including a plate-like base material, a surface layer member, and a skin material may be configured by fixing the skin material to the surface of the plate-like portion opposite to the protrusion. Further, the first member is a plate-like surface layer member made of an elastically deformable resin material, and the above-described three-layer structure is obtained by closely contacting the back surface opposite to the protrusion of the second member to the plate-like substrate. It may be configured.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the figures are simplified or modified for explanation. The dimensional ratio and shape of each part are not necessarily drawn accurately.

FIG. 1 is a schematic view showing a shoulder portion at the upper end of a vehicle door trim 12 having an ornament 10 to which the present invention is applied, that is, a portion located at the lower end of a window. FIG. 1 is a front view of a design surface 19 when the door on the right side of the vehicle is viewed from the interior. FIG. 2 is a longitudinal sectional view of the ornament 10 taken along the line II-II in FIG. The ornament 10 is an overlapped composite interior part composed of a plate-like base material 14 and a surface layer member 16. The surface layer member 16 is disposed so as to overlap the surface 15 of the base material 14. The ornament 10 corresponds to a plate-like panel, and the surface 15 of the base material 14 corresponds to a mating surface.

The surface layer member 16 is a second member, and is made of a relatively soft elastically deformable synthetic resin material such as soft polyvinyl chloride. The surface layer member 16 includes a plate-like portion 18 disposed substantially parallel to the surface 15 of the base material 14, and a plurality of protrusions 20 that protrude from the back surface of the plate-like portion 18 toward the surface 15 of the base material 14. ing. A space 24 is formed between the plate-like portion 18 and the surface 15 by the plurality of protrusions 20. In addition, the outer peripheral terminal portion 26 of the plate-like portion 18 is wound around the outer peripheral edge portion of the base material 14 with the tip end of the protrusion 20 in close contact with the surface 15 of the base material 14, and is engaged with a locking portion (not shown). It has been stopped. Thus, the surface layer member 16 is attached to the base material 14. The base material 14 is a first member, and is formed of a synthetic resin material such as polypropylene that is harder than the surface layer member 16. The ornament 10 is attached to the vehicle door trim 12 via an attachment engagement portion (not shown) of the base material 14. The outer peripheral terminal portion 26 of the plate-like portion 18 is pressed and held while being wound around the outer peripheral edge portion of the base material 14 by the plurality of presser portions 28 of the vehicle door trim 12. You may fix the outer peripheral terminal part 26 of the plate-shaped part 18 to the peripheral part of the base material 14 with an adhesive agent.

FIG. 3 is a cross-sectional view of a molding die for molding the surface layer member 16. The mold includes an upper mold 30 and a lower mold 32. The lower mold 32 for forming the protrusion 20 is composed of a plurality of divided molds 32a to 32d in consideration of releasability and mold maintenance. When molding by combining a plurality of split molds 32a to 32d, it is difficult to provide a recess for molding the projection 20 near the edge of the split molds 32a to 32d in order to ensure the strength of the split mold. 4A and 4B are plan views of the surface layer member 16 as viewed from the protrusion 20. In the vicinity of the parting line L, which is the boundary between the plurality of divided molds 32a to 32d, that is, in the area of the dimensions g1 and g2, a blank portion without the protrusion 20 is formed. The dimensions g1 and g2 are the same dimension, and are set to 1.5 to 2.0 mm or more so as to ensure a predetermined strength according to the material of the split dies 32a to 32d, the shape of the protrusion 20, and the like. The parting line L is a straight line.

4A and 4B, the arrangement pattern of the protrusions 20 is different between the boundary region in the vicinity of the mold parting line L and the general region separated from the parting line L. For this reason, when the protrusions 20 are described separately, the protrusions 20 in the general region are expressed as general protrusions 20a, and the protrusions 20 in the boundary region are expressed as boundary protrusions 20b. 4A and 4B partially show the boundary region and the general region. FIG. 4A shows the shape of the protrusion 20 in a non-pressed state. FIG. 4B shows a shape after the projection 20 is deformed by applying a pressing load from the vertical direction of the plate-like portion 18.

FIG. 5 is an enlarged longitudinal sectional view showing a portion along the line VV in FIG. 4 (a). FIG. 6 is a longitudinal sectional view of a portion along the line VI-VI in FIG. 5, and is a sectional view of the general protrusion 20a along the neutral surface S inclined in the same direction as the general protrusion 20a. FIG. 7 is a perspective view of the plurality of general protrusions 20a as viewed obliquely from above. As is clear from each drawing, the plurality of general protrusions 20a all have the same shape. Each general protrusion 20 a has a longitudinal cross section parallel to the plate-like portion 18. As shown in FIGS. 4A and 4B, the plurality of polygons form a lattice pattern 34 by overlapping their sides with the sides of the adjacent polygons. Each general protrusion 20a is disposed on each side of the polygon. The longitudinal direction of the cross section of each general protrusion 20a is substantially parallel to each side of the polygon. The shape of the cross section of each general protrusion 20a is a rectangle with four rounded corners. 4A and 4B, the lattice pattern 34 has a honeycomb shape in which regular hexagons having the same size are repeated continuously. Each general protrusion 20a is provided one by one at the center of each side of the regular hexagon.

The general protrusion 20a is formed in a plate shape having a substantially rectangular cross section. The general protrusion 20a is formed in a tapered shape having a cross-sectional area that decreases toward the distal end portion. As is clear from FIG. 5, the general protrusion 20 a has a neutral surface S that passes through the center in the thickness direction. The neutral surface S is inclined from the normal line O perpendicular to the plate-like portion 18 by an inclination angle α from the base end portion to the tip end portion 36 of the general protrusion 20a. The neutral surface S is a surface in which a neutral line that bisects the plate thickness in a cross section parallel to the plate-like portion 18 is connected in the axial direction of the general protrusion 20a. As shown in FIG. 6, the center plane S includes a center line C that connects the center of the cross section parallel to the plate-like portion 18 in the axial direction of the general protrusion 20 a. As shown in FIG. 1, the plate-like portion 18 and the surface 15 of the base material 14 are substantially parallel. For this reason, the normal line O of the plate-like portion 18 substantially coincides with the vertical direction of the surface 15 of the substrate 14 in a relatively narrow region in the vicinity of each general protrusion 20a. Further, the tip portion 36 of the general protrusion 20 a is in contact with the surface 15 of the base material 14 at substantially the same angle as the inclination angle α. The inclination angle α is set within a range of 5 ° ≦ α ≦ 30 ° so that the tip portion 36 of the general protrusion 20a slides relative to the surface 15 of the base material 14. The distal end portion 36 of the general protrusion 20a has a longitudinal section in the thickness direction shown in FIG. 5, and the longitudinal section in the thickness direction has an arc shape. The front end portion 36 of the general protrusion 20a has a longitudinal section in the plate width direction shown in FIG. 6, and both ends in the width direction of the longitudinal section in the plate width direction are rounded. For this reason, the front-end | tip part 36 of the general protrusion 20a slides smoothly with respect to the surface 15 of the base material 14 to the one direction A side which is an inclination direction.

Next, the general protrusion 20a will be described more specifically with reference to FIGS.
As shown in FIG. 5, the pitch P, which is the distance between two parallel sides of a regular hexagon forming the lattice pattern 34, that is, the center distance between the two general protrusions 20a provided on each side is 4.0 mm. ≦ P ≦ 9.0 mm, and in the first embodiment, about 7.0 mm. Moreover, the height dimension H of the general protrusion 20a is in the range of 2.0 mm ≦ H ≦ 5.0 mm, and is about 3.3 mm in the first embodiment. The thickness d of the base end portion of the general protrusion 20a is in the range of 1.0 mm ≦ d ≦ 2.0 mm, and is about 1.2 mm in the first embodiment.

As shown in FIG. 6, the plate width dimension L of the base end portion of the general protrusion 20a is in the range of 1.5 mm ≦ L ≦ 2.5 mm, and is set to be larger than the plate thickness dimension d. Then, it is about 1.8 mm. Both side surfaces of the general protrusion 20a in the plate width direction are inclined with respect to the center line C at an inclination angle β. The inclination angle β is in the range of 5 ° ≦ β ≦ 15 °, and is about 7 ° in the first embodiment. The vertical section of the general protrusion 20a in the plate width direction is symmetric with respect to the center line C. The thickness t of the plate-like portion 18 is in the range of 1.0 mm ≦ t ≦ 2.0 mm, and is about 1.5 mm in the first embodiment.

In the general region where the general protrusion 20 a is provided, when the plate-like portion 18 of the surface layer member 16 is pressed with a finger or hand, the tip 36 of the general protrusion 20 a is pressed against the surface 15 of the substrate 14. At this time, the general protrusion 20a is elastically deformed so that it falls down, thereby exhibiting cushioning properties and obtaining a predetermined tactile sensation. That is, since the general protrusion 20a is inclined in the direction A around the axis perpendicular to the plate-like portion 18, when a load is applied to the plate-like portion 18 from a substantially vertical direction, the tip portion 36 of the general protrusion 20a is It slides and moves in one direction A with respect to the surface 15 of the base material 14. Thereby, the soft protrusion (cushioning property) is exhibited because the general protrusion 20a bends and deforms in one direction A side or bends. In FIG. 4B, the hatched portion continuously drawn to each general protrusion 20a indicates a planar shape in a state where the general protrusion 20a is bent and deformed. The pitch P and the height dimension H of the general protrusions 20a are set to values at which the general protrusions 20a do not interfere at the time of bending deformation. The dimensions and angles of the respective portions of the general protrusion 20a are set to values at which desired soft feeling, rigidity, strength, and the like can be obtained in consideration of the material of the surface layer member 16 and the like.

On the other hand, the boundary protrusions 20b provided in the boundary region are aligned at equal intervals along the mold dividing line L on both sides of the mold dividing line L. The distance between the centers of the base ends of the boundary protrusions 20b is shorter than the distance between the centers of the base ends of the general protrusions 20a. As shown in FIGS. 4 (a) and 4 (b), one general protrusion 20a is provided at the center of each side of the regular hexagon forming the honeycomb shape. For this reason, the interval between the general protrusions 20a adjacent to the parting line L is not equal. The boundary protrusion 20b has the same shape as the general protrusion 20a. The boundary protrusion 20b is inclined at an inclination angle α so as to bend toward the one direction A side while sliding the tip portion 36 relative to the surface 15 of the base material 14. Further, the boundary protrusions 20b aligned on both sides of the parting line L bend toward the boundary protrusions 20b in the opposite row. That is, the boundary protrusions 20b in each row are bent and deformed in a direction orthogonal to the parting line L. The boundary protrusions 20b in each row are aligned in parallel on both sides of the parting line L so as to bend as described above. The boundary protrusion 20b in each row is disposed between the two boundary protrusions 20b in the opposite row. The boundary protrusions 20b are arranged in a staggered manner. That is, the boundary protrusions 20b in each row are not arranged in front of the boundary protrusions 20b in the opposite row. In FIG. 4B, the hatched portion continuously drawn on each boundary protrusion 20b indicates a planar shape in a state where the boundary protrusion 20b is bent. As shown in FIG. 4B, the tip portions 36 of the boundary protrusions 20b almost reach the parting line L when the boundary protrusions 20b are bent and deformed, but do not interfere with each other. The height dimension H of each boundary protrusion 20b may be set to a value at which the tip 36 of the boundary protrusion 20b at the time of bending deformation exceeds the parting line L. Further, the boundary protrusions 20b in each row may be arranged so that the boundary protrusions 20b at the time of bending deformation interfere with each other.

According to the ornament 10 of the first embodiment, the boundary protrusions 20b aligned on both sides of the parting line L are arranged in a staggered manner so as to bend toward the boundary protrusions 20b in the opposite row. For this reason, even when the boundary projection 20b is separated from the parting line L by the predetermined dimensions g1 and g2 in order to ensure the strength of the split molds 32a to 32d, when the surface layer member 16 is pressed with a finger or hand, FIG. ), The boundary projections 20b on both sides of the parting line L are bent and deformed so as to fill the blank portion near the parting line L. Thereby, since the unevenness | corrugation by the fall of the reaction force of the parting line L vicinity is suppressed, a uniform tactile sensation is obtained. In other words, although the boundary projections 20b on both sides of the parting line L are bent, they do not interfere with each other, so that unevenness in the vicinity of the parting line L is suppressed.

Further, the boundary protrusions 20b on both sides of the parting line L are aligned in parallel so that the inclination directions of the boundary protrusions 20b in each row are the same. For this reason, a recessed part can be easily processed into the shaping | molding die which shape | molds the boundary protrusion 20b. Therefore, the manufacturing cost including the production of the mold can be reduced.

Further, a plurality of general protrusions 20a are provided in a general region separated from the parting line L. Each of the general protrusions 20 a is disposed on each side of the polygon that forms the lattice pattern 34. For this reason, variation in tactile sensation when the surface layer member 16 is pressed with a finger or hand is suppressed, and an excellent tactile sensation with less unevenness can be obtained together with the boundary protrusion 20b near the parting line L. In particular, the plurality of general protrusions 20a have the same shape and bend and deform in one direction around the shaft. Further, the deflection direction of each general protrusion 20a alternately changes between the outer side and the inner side in each side of the regular hexagon constituting the honeycomb-shaped lattice pattern 34. In this case, the plurality of general protrusions 20a are arranged by changing the posture of the general protrusions 20a at a high density and corresponding to each side of the regular hexagon. Thereby, a more uniform tactile sensation is obtained.

The general protrusion 20a and the boundary protrusion 20b are distinguished as follows.
A protrusion that is at least closest to the parting line L and aligned along the parting line L is defined as a boundary protrusion 20b. Based on the distance between the boundary projections 20b adjacent along the parting line L, the general projection 20a and the boundary projection 20b are distinguished.

If the distance between the protrusions forming a row along the mold dividing line L is equal to or less than the distance between the boundary protrusions 20b listed above on the side opposite to the mold dividing line L formed by the boundary protrusion 20b mentioned above The protrusion is defined as a boundary protrusion 20b. In the first embodiment, the boundary protrusions 20b are arranged in a single row, but may be a plurality of rows.

On the other hand, the distance between the protrusions forming a row along the mold dividing line L on the side opposite to the mold dividing line L formed by the boundary protrusions 20b is larger than the distance between the boundary protrusions 20b mentioned above. Is larger, the protrusion is defined as a general protrusion 20a.

The distance used in the above definition is the distance between the protrusions when the protrusion 20 is not bent and deformed and the surface layer member 16 is not pushed toward the base material 14.
Next, with respect to points A to C shown in FIG. 4A, reaction force characteristics when a pressing piece is pressed vertically from a plate-like portion 18 to a flat test article configured in the same manner as the surface layer member 16 are shown. Examined. The result is shown in FIG. The tip of the pressing piece is formed in a circular shape having a diameter of 14 mm. As shown in FIG. 8, even when the stroke of the pressing piece is around 2 mm, the reaction force difference ΔF is suppressed to 3N or less. Therefore, the difference in reaction force over the entire area of the test piece was extremely small, and a substantially uniform tactile sensation was obtained. A shaded portion in FIG. 4 (a) is a pressing area by a pressing piece having a diameter of 14 mm, and shows a size corresponding to a human fingertip.
[Second Embodiment]
Next, a second embodiment will be described. The main difference between the second embodiment and the first embodiment is the portion related to the boundary protrusion. Therefore, the description of the same configuration as that of the first embodiment is omitted.

As shown in FIGS. 5 and 7, the shape of the cross section at the base end of the protrusion 20 is a rectangle. Further, the protrusion 20 is a slanted quadrangular pyramid inclined by an inclination angle α with respect to the normal line O perpendicular to the plate-like portion 18, and all the corners are rounded.

For this reason, when the protrusion 20 is pushed toward the base material 14 parallel to the plate-like portion 18, a downward force along the normal line O acts on the tip portion 36 of the protrusion 20. Then, the protrusion 20 bends in the direction in which the inclination angle α increases. Thus, the protrusion 20 has anisotropy in which the bending direction is limited to the one direction A side. The center point on the bottom surface of the protrusion 20 is defined as a bottom surface center point CP.

As shown in FIG. 14 (a), there are two types of boundary protrusions 20b: a first boundary protrusion 20b1 and a second boundary protrusion 20b2. The first boundary protrusion 20b1 and the second boundary protrusion 20b2 differ only in the arrangement position and the bending direction, and have the same shape as the protrusion 20 shown in FIGS.

As shown in FIG. 14 (a), the plurality of first boundary projections 20b1 are respectively arranged with the arrangement line L1 connecting the bottom surface center point CP1 of each first boundary projection 20b1 parallel to the parting line L. ing. Further, the plurality of first boundary protrusions 20b1 are arranged in such a manner that their bending direction A1 intersects the arrangement line L1 and the perpendicular of the arrangement line L1 and away from the parting line L. The first boundary protrusion 20b1 corresponds to a first protrusion and a third protrusion.

The plurality of second boundary protrusions 20b2 has a layout line L2 connecting the bottom surface center point CP2 of each second boundary protrusion 20b2 parallel to the parting line L, and the parting line L2 is slightly parted from the parting line L1. They are arranged apart from the line L. Further, the plurality of second boundary protrusions 20b2 are arranged in such a manner that their bending direction A2 intersects the arrangement line L2 and the perpendicular to the arrangement line L2 and in the direction close to the parting line L. The second boundary protrusion 20b2 corresponds to a second protrusion and a fourth protrusion.

As shown in FIG. 14B, when viewed from the parting line L, the first boundary protrusions 20b1 and the second boundary protrusions 20b2 are alternately arranged. 14B, the first boundary protrusion 20b1 and the second boundary protrusion 20b2 have a distance between adjacent protrusions and a bending plate width dimension at the time of bending deformation. The distal end portion 36 is set so as not to contact the proximal end portion of the adjacent protrusion.

The first boundary protrusion 20b1 and the second boundary protrusion 20b2 are disposed on both sides of the parting line L, and are disposed opposite to each other.
Next, the operation and effect of the above configuration will be described.

(1) The first boundary protrusion 20b1 is arranged on the arrangement line L1 parallel to the parting line L. Further, the second boundary protrusion 20b2 is arranged on the arrangement line L2 that is parallel to the parting line L and that is farther from the parting line L than the arrangement line L1. When viewed from the parting line L, the first boundary protrusions 20b1 and the second boundary protrusions 20b2 are alternately arranged. Thereby, in the surface member 16, the site | part with a large thickness by the boundary protrusion 20b does not line up linearly. As a result, gloss unevenness is less likely to occur on the design surface 19 of the surface layer member 16 opposite to the protrusions 20.

(2) The protrusion 20 has anisotropy whose bending direction is limited to the one direction A side. 14A and 14B, the bending direction A1 of the first boundary protrusion 20b1 is away from the parting line L, and the bending direction A2 of the second boundary protrusion 20b2 is Each is directed in a direction approaching the parting line L. Further, the bending directions A1 and A2 of the first and second boundary protrusions 20b1 and b2 intersect each other. Thereby, the orientation of the bottom surface of the base end portion of the first boundary projection 20b1 is different from the orientation of the bottom surface of the base end portion of the second boundary projection 20b2. For this reason, each base end portion of the first boundary projection 20b1 and the second boundary projection 20b2, that is, the line segment LG1 parallel to the longitudinal direction of the bottom surface of each base end portion has an angle that intersects the parting line alternately. It is arranged in a zigzag by making it different. As a result, gloss unevenness is less likely to occur on the design surface 19 of the surface layer member 16 opposite to the protrusions 20.

(3) Similarly to the above, the line segment LG2 connecting the tip portions 36 of the first and second boundary protrusions 20b1 and 20b2 is also arranged in a zigzag manner. The tip portions 36 of the first and second boundary protrusions 20b1 and 20b2 are contact points that contact the surface 15 of the base material 14. According to this configuration, the contact points are not concentrated in the vicinity of the parting line L and the repulsive force due to the bending deformation of the protrusions is dispersed as compared with the case where the virtual line segments connecting the contact points are linearly arranged. The Therefore, the feeling of unevenness in the vicinity of the parting line is suppressed.

Next, another embodiment of the present invention will be described. In the following embodiments, portions that are substantially common to the above embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
9 (a) and 9 (b) are plan views corresponding to FIGS. 4 (a) and 4 (b). In the surface layer member 40 shown in FIGS. 9A and 9B, the interval between the parting lines L is narrow. In this case, the protrusion 20 includes only a plurality of boundary protrusions 20b that are opposed to both sides of the parting line L and arranged in a staggered manner. Also in this case, there is a blank portion of the protrusion 20 in the vicinity of the parting line L. However, when the surface layer member 40 is pressed with a finger or hand, the boundary protrusion 20b has a parting part as shown in FIG. It bends and deforms so as to fill a blank portion near the line L. Thereby, since the unevenness | corrugation by the fall of the reaction force of the parting line L vicinity is suppressed, uniform tactile sensation is obtained.

The ornament 50 shown in FIG. 10 includes a skin material 52 on the surface of the surface layer member 16, that is, the surface of the plate-like portion 18 opposite to the protrusion 20. The ornament 50 has a three-layer structure including a surface layer member 16, a skin material 52 fixed to the surface layer member 16, and a plate-like base material 14. The skin material 52 is made of, for example, a woven fabric, a nonwoven fabric, a knitted fabric, vinyl chloride, or a soft film. The skin material 52 is fixed to the surface of the surface layer member 16 by being molded simultaneously with the surface layer member 16. Further, the outer peripheral terminal portion 54 of the skin material 52 is wound around the outer peripheral edge portion of the base material 14 and is locked to a locking portion (not shown). Thus, the ornament 50 is attached to the vehicle door trim 12. In this state, the outer peripheral terminal portion 54 of the skin material 52 is pressed against the outer peripheral edge portion of the base material 14 by the pressing portion 28 of the vehicle door trim 12, so that the surface layer member 16 is attached to the base material 14 together with the skin material 52. It has been.

Also in the ornament 50, the same effect as the ornament 10 is obtained. In addition, since the surface layer member 16 is covered with the skin material 52, even when sink marks or gloss unevenness occurs on the surface of the surface layer member 16 opposite to the protrusions 20, exposure of sink marks or gloss unevenness can be prevented, and the surface layer member 16 scratches can be prevented. For this reason, the selection range of the resin material of the surface layer member 16 is widened, and the degree of freedom in designing the shape of the protrusion 20 is increased. Therefore, the tactile sensation of the surface layer member 16 can be easily adjusted.

The ornament 60 shown in FIG. 11 includes a cushion member 66 provided with a plurality of protrusions 64 on the surface of a plate-like base material 62. A surface layer member 68 is superimposed on the surface of the cushion member 66 on the protrusion 64 side. The base material 62 is made of a relatively hard synthetic resin material, like the base material 14. The cushion member 66 corresponds to a second member, and is made of a synthetic resin material that can be elastically deformed, like the surface layer member 16. The cushion member 66 has a plate-like portion 70 that is fixed in close contact with the surface of the base material 62. A plurality of protrusions 64 are provided on the plate-like portion 70. For example, the protrusion 64 has an inclination angle α from the plate-like portion 70 toward the surface layer member 68 so as to form a space 74 between the back surface 72 of the surface layer member 68 and the plate-like portion 70, as in the case of the protrusion 20. It protrudes. The tip of the protrusion 64 is in close contact with the back surface 72 of the surface layer member 68. The back surface 72 corresponds to a mating surface. Further, the surface layer member 68 corresponds to a first member, and in this embodiment, the surface layer member 68 is made of a relatively soft synthetic resin material like the surface layer member 16. The ornament 60 is attached to the vehicle door trim 12 in a state in which the outer peripheral terminal portion 76 of the surface layer member 68 is wound around the outer peripheral edge portion of the base material 62. Thereby, the outer peripheral terminal portion 76 of the surface layer member 68 is pressed against the outer peripheral edge portion of the base member 62 by the presser portion 28 of the vehicle door trim 12, and the surface layer member 68 is attached to the base member 62. The skin member 52 may be further provided on the surface layer member 68.

In the ornament 60, when the surface layer member 68 is pressed with a finger or hand, the back surface 72 of the surface layer member 68 is pressed against the tip of the protrusion 64 of the cushion member 66. At this time, an excellent tactile sensation is obtained by the elastic deformation of the protrusion 64. Further, the cushion member 66 is covered with the surface layer member 68, and the plate-like portion 70 of the cushion member 66 is fixed to the base material 62. According to this configuration, even if sink marks or gloss unevenness occurs on the surface of the plate-like portion 70 opposite to the protrusions 64, exposure of sink marks or gloss unevenness can be prevented. In this case, the range of selection of the resin material for the cushion member 66 is widened, and the degree of freedom in designing the shape of the protrusion 64 is increased. Therefore, the tactile sensation of the surface layer member 68 can be easily adjusted.

Here, the surface of the cushion member 66 on the side of the protrusion 64 is formed using a plurality of divided molds in the same manner as the surface layer member 16. For this reason, there is a blank portion without the protrusion 64 in the vicinity of the parting line (not shown). In this regard, according to the present embodiment, as in FIGS. 4A and 4B, on both sides of the parting line, a plurality of boundary protrusions 64b are bent and deformed toward the opposing boundary protrusions 64b. Are arranged in a staggered pattern. Further, in the general region separated from the parting line, as in FIGS. 4A and 4B, a plurality of general protrusions 64 a are formed on each side of the regular hexagon forming the lattice pattern 34. It arrange | positions so that a bending direction may be changed to an outer side and an inner side alternately. As a result, as with the ornament 10, the unevenness due to the decrease in the reaction force in the vicinity of the parting line is suppressed, so that a more uniform tactile sensation is obtained.

In the second embodiment, the bending direction A1 of the first boundary protrusion 20b1 intersects the arrangement line L1 parallel to the parting line L and the perpendicular of the arrangement line L1, but FIGS. 15 (a) and 15 (b). As shown in FIG. 5, the bending direction A1 of the first boundary protrusion 20b1 may be changed along the perpendicular of the arrangement line L1, that is, in a direction orthogonal to the arrangement line L1. Similarly, the bending direction A2 of the second boundary protrusion 20b2 intersects the arrangement line L2 parallel to the parting line L and the perpendicular of the arrangement line L2, but as shown in FIGS. 15 (a) and 15 (b). The bending direction A2 may change the bending direction A2 of the two boundary protrusions 20b2 along the perpendicular of the arrangement line L2, that is, in a direction orthogonal to the arrangement line L2. Also with this configuration, the line segment LG1 of each base end portion of the first boundary protrusion 20b1 and the second boundary protrusion 20b2 is arranged in a zigzag, and thus the same effect as (1) of the second embodiment can be obtained. Can do.

In the second embodiment, the first boundary protrusion 20b1 is provided on the arrangement line L1 and the second boundary protrusion 20b2 is provided on the arrangement line L2. However, the first boundary protrusion 20b1 is provided on the same arrangement line. 20b1 and the second boundary protrusion 20b2 may be provided. Even in this configuration, if the deflection directions A1 and A2 intersect each other, the line segment LG1 of each base end portion of the first boundary protrusion 20b1 and the second boundary protrusion 20b2 is arranged in a zigzag manner. The effect similar to (2) of an Example can be acquired.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art.

Claims

A composite interior part comprising a first member and a second member superimposed on the first member,
The second member is formed using a plurality of divided molds,
The second member is
A plurality of general protrusions protruding toward the first member and deflected by contact with the first member;
A plurality of boundary projections provided between the plurality of split mold parting lines and the general projections, projecting toward the first member and deflecting by contact with the first member;
The plurality of boundary protrusions are arranged at equal intervals on both sides of the parting line so as to form a row along the parting line,
The overlap composite interior part, wherein a distance between the boundary protrusions is shorter than a distance between adjacent general protrusions along the parting line.
In the laminated composite interior part according to claim 1,
The second member has a projecting surface from which the boundary projection projects,
The overlapping composite interior part, wherein the boundary protrusion protrudes in a state inclined to the parting line with respect to a normal line perpendicular to the protruding surface of the second member.
In the laminated composite interior part according to claim 1 or 2,
The boundary protrusion is provided on both sides of the parting line,
One of the boundary projections on both sides of the parting line is an overlapping composite interior part that does not face the other boundary projection.
In the superimposed composite interior part according to any one of claims 1 to 3,
The second member has a design surface on the side opposite to the general protrusion and the boundary protrusion,
The boundary protrusion is provided at a position that is separated from the mold parting line by a first distance and at a position that is separated from the parting line by a second distance different from the first distance. A second projection to be
The first and second protrusions are superimposed composite interior parts that are alternately arranged when viewed from the parting line.
In the laminated composite interior part according to any one of claims 1 to 4,
The general protrusion and the boundary protrusion are formed of a cone whose outer shape gradually decreases from the proximal end portion toward the distal end portion,
The cross-sectional shape of the base end portion is an overlapped composite interior part in which the length in the perpendicular direction orthogonal to the specific direction is greater than the length in the specific direction and is line symmetric.
In the laminated composite interior part according to claim 5,
The boundary protrusions are arranged with a third protrusion arranged facing a first direction away from the parting line and a fourth part arranged facing a second direction close to the parting line. With protrusions,
The first and second directions are both the specific direction,
The second direction is a direction intersecting the first direction;
The third and fourth protrusions are superimposed composite interior parts that are alternately arranged when viewed from the parting line.
In the superimposed composite interior part according to any one of claims 1 to 6,
A plurality of polygons form a lattice pattern by superimposing each side thereof with an adjacent polygon side, and the plurality of general protrusions are provided on each side of the polygon. Interior parts.
In the laminated composite interior part according to claim 7,
The general protrusion is provided on a plate-like portion of the second member arranged in parallel with the mating surface of the first member,
In the general protrusion, the bending rigidity with respect to a load applied from a direction perpendicular to the plate-like portion has anisotropy around an axis perpendicular to the plate-like portion,
The general protrusion is configured to bend in one direction around the shaft while sliding the tip portion relative to the mating surface,
The lattice pattern is a honeycomb shape in which regular hexagons having a certain size are continuously repeated,
The general protrusions are arranged one on each side of the regular hexagon,
The overlapping composite interior part in which the deflection direction of the general protrusion changes alternately inward and outward in each piece around the center of the regular hexagon.
An overlapping composite interior part having a first member having a predetermined mating surface and a second member made of an elastically deformable synthetic resin superimposed on the first member, wherein the second member A plurality of protrusions projecting toward the mating surface to form a space between the plate-shaped portion and the mating surface; and the second member. Is superimposed on the first member in a state in which the tip of the projection is in contact with the mating surface, and is superimposed composite in which cushioning is imparted by the tip of the projection being pressed against the mating surface and elastically deforming. For interior parts,
The protrusion side surface of the second member is molded using a plurality of split dies,
Boundary protrusions provided on both sides of the dividing mold parting line are aligned at equal intervals and in a line along the parting line,
In the boundary protrusion, the bending rigidity with respect to a load applied from a direction perpendicular to the plate-like portion has anisotropy around an axis perpendicular to the plate-like portion,
The boundary protrusion is configured to bend in one direction around the axis while sliding the tip portion relative to the mating surface,
The boundary protrusions aligned on both sides of the parting line are provided so as to bend toward the boundary protrusions of the opposite rows,
The above-mentioned boundary projections are arranged in a staggered manner while being arranged in an intermediate portion between adjacent boundary projections in an opposing row.
The superimposed composite interior part according to claim 9,
The boundary protrusions have the same shape;
The center line of the boundary protrusion is inclined at a base end portion of the boundary protrusion with respect to a direction perpendicular to the plate-shaped part,
The boundary protrusion is bent in an inclined direction which is one direction around the axis,
Boundary protrusions on both sides of the parting line are stacked composite interior parts that are aligned in parallel so that the inclination directions of the boundary protrusions in each row are the same.
In the laminated composite interior part according to claim 10,
A plurality of general protrusions are provided in a general region spaced apart from the parting line in the second member,
A plurality of polygons form a lattice pattern by superimposing their sides with the sides of adjacent polygons,
The plurality of general protrusions are overlapped composite interior parts provided on each side of the polygon.
The overlapping composite interior part according to claim 11,
The general protrusions have the same shape,
In the general protrusion, the bending rigidity with respect to a load applied from a direction perpendicular to the plate-like portion has anisotropy around an axis perpendicular to the plate-like portion,
The general protrusion is configured to bend in one direction around the shaft while sliding the tip portion relative to the mating surface,
The lattice pattern is a honeycomb shape in which regular hexagons having a certain size are continuously repeated,
The general protrusions are arranged one on each side of the regular hexagon,
The overlapping composite interior part in which the bending direction of the general protrusions alternately changes inward and outward on each side around the center of the regular hexagon.