JP6231402B2 - Decorative material - Google Patents

Description

  The present invention relates to a decorative member in which a skin material is adhered to the surface of a base member with an adhesive, and in particular, a joint portion between a first base fabric and a second base fabric of the skin material, and a step portion formed on the base member. It is related with the decoration member which provides a space part between and a skin material is affixed on a base member.

  As an interior member to be mounted in an automobile, a decorative member decorated by adhering a skin material to the surface of a base member may be used. In addition, in order to enhance the sense of quality of the decorative member, a skin material formed by stitching a plurality of base fabrics (skin pieces) may be attached to the surface of the base member.

  Further, for example, in Japanese Patent Application Laid-Open No. 2008-110543 (Patent Document 1), a skin member having a suture line (stitching line) formed by stitching a first base fabric and a second base fabric is used as a base member. A method of manufacturing a decorative member is disclosed in which a decorative member (for example, an opening / closing lid of a glove box of an automobile) is manufactured by being attached to a surface of a (base material) so that a suture line is at a certain position.

  In the manufacturing method described in Patent Document 1, a skin material is pasted on the surface of a base material using a skin pasting apparatus. This skin sticking device includes a base material mounting table having a base material mounting surface in which a concave portion is formed, a blade including a blade portion for positioning a suture line in contact with a step portion of the skin material, A cover body movable between a position on the rear side of the material mounting table and an upper position of the substrate mounting table;

  When pasting the skin material using such a skin pasting device, the base material placement surface of the base material placement table is placed with the base material coated with the adhesive, and the cover body is moved. By arrange | positioning above the adhesive agent coating surface of a base material, the adhesive agent coating surface of a base material is covered except for the side edge part of the said surface with a cover body. At this time, the side edge part of the adhesive application surface of the substrate is exposed and released.

  Next, a skin material produced by stitching the first base fabric and the second base fabric is placed on the cover body, and is placed above the adhesive-coated surface of the base material. It moves to a base-material mounting surface, a skin material is pressed with the blade of a blade, and the back surface of a skin material is contact | abutted to the adhesive-coated surface of a base material. Subsequently, the skin material is pulled by manually pulling the edge of the skin material, and the step portion of the stitched portion where the first base fabric and the second base fabric of the skin material are stitched together is brought into contact with the blade of the blade. The suture line is positioned and the position of the suture line is maintained.

  Thereafter, the cover body is retracted backward from between the skin material and the base material, and the skin material is laminated on the adhesive-coated surface of the base material to be bonded and fixed, and further, the blade is moved away from the base material mounting table. Accordingly, a skin-embedded product in which the stitching line is arranged at a fixed position and the skin material is stuck to the surface of the base material can be manufactured.

JP 2008-110543 A

  In the skin material formed by stitching the first base fabric and the second base fabric as in Patent Document 1, the cut edges of the first base fabric and the second base fabric are usually made invisible from the outside. Therefore, the first base fabric and the second base fabric are stitched together in a state where the end edge portion of the first base fabric is folded and overlapped on the end edge portion of the second base fabric (see, for example, FIG. 7). . For this reason, the stitching portions of the first base fabric and the second base fabric in the skin material are formed with a certain thickness.

  Moreover, the base member (base material) to which the skin material provided with such a stitched portion is attached is arranged at a position lower than the first surface portion to which the first base fabric is attached and the first surface portion, and the second surface portion. It has the 2nd surface part to which a base fabric is stuck, and the level | step-difference part distribute | arranged corresponding to the thickness of a stitching | suture part between a 1st surface part and a 2nd surface part. Further, as shown in the drawing of Patent Document 1 (for example, FIG. 9 of Patent Document 1), the step portion of the base member is arranged so as to be orthogonal to the first surface portion. The corner between the surface portion and the step portion is formed at a substantially right angle so as to form a ridge line.

  Furthermore, when a skin material in which the first base fabric and the second base fabric are stitched is attached to the surface of the base member having such a stepped portion, a dimensional error or the like that occurs when the first and second base fabrics are cut. In order to allow a dimensional error that occurs when sewing the first base fabric and the second base fabric, generally, the end surfaces of the first base fabric and the second base fabric disposed in the stitching portion of the skin material, and the step in the base member A skin material is affixed on the surface of a base member so that a space part may be provided between the wall surface of a part.

  However, the decorative member was manufactured by pasting the skin material in which the first base fabric and the second base fabric were sewn on the surface of the base member having the stepped portion so that the above-described space portion was formed. In this case, a streak line is formed on the outer surface of the skin material of the decorative member (particularly, the outer surface of the first base fabric) corresponding to the ridgeline of the corner formed between the first surface portion and the step portion of the base member. It may appear, and the state in which the skin material has fallen into the space formed between the stitched portion of the skin material and the stepped portion of the base member is fixed, so that it is slightly depressed along the space. There exists a possibility that a recessed part of a shape may be formed. For this reason, there existed a problem of reducing the external appearance quality (appearance) of a decoration member.

  The present invention has been made in view of the above-described conventional problems, and a specific object thereof is a skin material provided with a joint portion between a first base fabric and a second base fabric, and a thickness of the joint portion. It is manufactured by adhering to the surface of the base member provided with a step portion corresponding to, and prevents the formation of streaky lines and slightly recessed portions on the outer surface of the attached skin material, The object is to provide a decorative member having an excellent appearance quality.

  In order to achieve the above object, a decorative member provided by the present invention has, as a basic configuration, a base member and a skin material adhered to the surface of the base member with an adhesive, and the skin The material includes a first base fabric, a second base fabric, and a joining portion that overlaps and joins an end edge portion of the first base fabric on an end edge portion of the second base fabric, and the base member Is a first surface portion to which the first base fabric is adhered, a second surface portion that is disposed lower than the first surface portion and to which the second base fabric is adhered, and the first surface portion. Between the first surface portion and the second surface portion corresponding to the thickness of the joint portion, and a space portion between the joint portion of the skin material and the step portion of the base member. The base member is a decorative member in which the skin material is attached to the base member, and the base member connects the first surface portion and the stepped portion in a curved surface shape. The curved surface portion has an adhesive portion to which the first base fabric adheres and a non-adhesive portion in which adhesion to the first base fabric is prevented to reduce the adhesive strength to the skin material. The main feature is to have a reduction means.

  In the decorative member according to the present invention, it is preferable that the reducing means is configured by forming fine uneven portions on the surface of the curved surface portion. In the present invention, the reducing means may be configured by attaching a plurality of fine powders to the surface of the curved surface portion.

  Furthermore, in the decorative member according to the present invention, the base member has a concave accommodation groove portion that accommodates the joint portion of the skin material, and the second surface portion is disposed on a bottom surface portion of the accommodation groove portion, It is preferable that the step portion is disposed on the side wall surface portion of the accommodation groove portion.

  In the decorative member according to the present invention, the skin material is overlapped in a state where the end edge portion of the first base fabric is folded over the end edge portion of the second base fabric, and the first base fabric and the second base fabric are stitched or the like. The base member has a first surface portion to which the first base fabric is attached, and a second member to which the second base fabric is attached. A surface portion and a step portion disposed between the first surface portion and the second surface portion corresponding to the thickness of the joint portion of the skin material. In addition, the skin material has elasticity that allows expansion and contraction, and a space is formed between the end surfaces of the first and second base fabrics arranged in the joint portion and the wall surface of the step portion of the base member. It is stuck on the surface of the base member so as to provide a portion.

  In such a decorative member of the present invention, the connecting portion (boundary portion) connecting the first surface portion and the stepped portion of the base member is formed in the form of an angular corner portion having a ridge line as in Patent Document 1. It is not carried out, and it is formed in the curved surface part in which the shape of the surface becomes a curved surface. As described above, when the skin material is attached to the surface of the base member having the stepped portion by arranging the curved surface portion between the first surface portion and the stepped portion, the corner portion as in Patent Document 1 is used. The outer surface of the skin material can be finished to a smooth surface by preventing the formation of streak lines corresponding to the ridge lines of the skin material on the outer surface of the skin material.

  On the other hand, when the curved surface portion is simply formed in a smooth curved surface shape between the first surface portion and the step portion of the base member as described above, the surface of the base member having the curved surface portion is When manufacturing a decorative member by sticking the skin material in which the first base fabric and the second base fabric are stitched together at the joint, a dent having a slightly depressed shape is formed on the outer surface of the skin material as described below. It has been found that the portion is formed along the space provided between the joint portion of the skin material and the step portion of the base member, resulting in a problem that the appearance quality of the decorative member is deteriorated.

  More specifically, for example, as shown in the reference diagram of FIG. 7, the skin material 64 is adhered to the surface of the base member 60 having the curved surface portion 61d between the first surface portion 61a and the stepped portion 61c. When manufacturing a decorative member, first, an adhesive is applied so as to be sprayed from above the base member 60, and the first base fabric 64a and the second base fabric are applied to the surface of the base member 60 to which the adhesive is applied. The skin material 64 is adhered to the base member 60 by covering the skin material 64 sewn with the stitching portion 64c and then pressing the skin material 64 toward the base member 60 from the outer surface side.

  However, in this case, the adhesive is applied to the first and second surface portions 61a and 61b of the base member 60 and is also applied to the curved surface portion 61d by spraying the adhesive on the base member 60 from above. For this reason, when covering the surface of the base member 60 to which the adhesive is applied with the skin material 64 and then pressing the skin material 64 toward the base member 60 from the upper surface side, the first and second of the base member 60 are applied. The first and second base fabrics 64a and 64b of the skin material 64 are bonded to the surface portions 61a and 61b, respectively, and the first base fabric 64a of the skin material 64 is also bonded and fixed to the curved surface portion 61d of the base member 60. The

  As a result, the skin material 64 is fixed in a state where the skin material 64 falls into the space portion 65 formed between the stitched portion 64c of the skin material 64 and the stepped portion 61c of the base member 60. As a result, the skin material 64 is In this case, there is a problem in that the recess 66 having a shape slightly depressed along the space 65 is formed on the outer surface of the skin material 64, and the appearance quality of the decorative member is deteriorated.

  On the other hand, in the present invention, a gap is formed between the bonding portion where the first base fabric (skin material) adheres to the curved surface portion of the base member and, for example, the first base fabric (skin material), and the skin There is provided a reducing means for locally reducing the bonding strength of the base member to the skin material by mixing with a non-bonded portion that is prevented from adhering to the first base fabric due to being separated from the material. . By providing the reducing means in this way, the adhesive force of the adhesive is lost in the non-bonded portion, and the effective bonding area of the curved surface portion to the skin material (first base fabric) can be reduced.

  This makes it difficult for the skin material to be bonded and fixed to the curved surface portion when the skin material is pressed and bonded from the upper surface side toward the base member after the skin material is covered on the surface of the base member to which the adhesive is applied. Therefore, when the pressure on the skin material is released, the elastic force of the skin material acts, and the skin material easily returns elastically to its original flat state (easily returns to elasticity).

  As a result, even if the curved surface portion is provided between the first surface portion and the step portion of the base member, a slightly depressed portion 66 as shown in FIG. 7 is formed on the outer surface of the skin material. Even if the dent 66 is formed on the outer surface of the skin material, the dent of the dent 66 can be reduced to make the dent 66 inconspicuous (blurred and obscure). it can. For this reason, the decorative member of this invention has the outstanding aesthetics, and can improve the external appearance quality.

  In such a decorative member of the present invention, the reducing means is configured by forming fine uneven portions (concave portions and / or convex portions) on the surface of the curved surface portion. By forming such an uneven portion, the adhesive applied to the curved portion flows from the convex portion to the concave portion side, so that the adhesive remaining on the surface of the convex portion is reduced and the adhesive force to the skin material is weakened. be able to. Moreover, since it becomes easy to form a space | gap between the surface of a recessed part and a skin material, the effective adhesion area with respect to the skin material of a curved surface part can be reduced effectively. Thereby, since it becomes difficult to form the above-mentioned recessed part in the outer surface of the skin material stuck on the surface of a base member, the external appearance quality of a decoration member can be improved.

  In the decorative member of the present invention, the reducing means may be configured by attaching a plurality of fine powders to the surface of the curved surface portion. For example, by spraying and attaching a plurality of fine powders such as sand and a grindstone to the surface of the curved surface portion to which the adhesive has been applied, the adhesive force of the adhesive is weakened and effective against the skin material of the curved surface portion. The adhesion area can be reduced. For this reason, it becomes difficult to form the above-mentioned recessed part 66 in the outer surface of the skin material stuck on the surface of a base member, and the external appearance quality of a decoration member can be improved.

  Furthermore, in the decorative member of the present invention, the base member has a concave receiving groove portion for receiving the joint portion of the skin material, and in this case, the second surface portion and the step portion of the base member are provided on the receiving groove portion. It is each distribute | arranged to the bottom face part and the side wall surface part. Thereby, even if the joint part of the skin material is formed bulky, the outer surface of the first base fabric and the outer surface of the second base fabric of the skin material are accommodated by housing the bulky joint part in the housing groove part of the base member. Since the outer surface of the skin material can be made uniform and flat with the boundary between the first base fabric and the second base fabric sandwiched between the heights, the decorative member can have a better appearance. Can be finished.

It is a perspective view which shows the steering wheel with which the decoration member which concerns on Example 1 of this invention was mounted | worn. It is a perspective view which shows the decoration member. It is sectional drawing in the III-III line shown in FIG. It is principal part sectional drawing which shows the principal part of the base member which comprises the decoration member. It is an expanded sectional view which expands and shows the principal part of the base member. It is sectional drawing which shows the modification of a base member. It is a reference figure explaining the dent part formed in the outer surface of a skin material.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. The present invention is not limited to the examples described below, and various modifications can be made as long as it has substantially the same configuration as the present invention and has the same effects. Is possible.

  For example, the case where the decorative member according to the embodiment is applied to a steering pad (airbag cover) disposed in the center of the steering wheel will be described below, but the decorative member of the present invention is as described above. In addition to the steering pad of a simple steering wheel, a decorative member disposed on an automobile part such as an instrument panel, a glove box lid, a console lid, or a decorative member disposed on other parts such as a seat. The present invention can be similarly applied to a case in which the skin material that is a decorative member is formed by joining two base fabrics of a first base fabric and a second base fabric by stitching or the like.

FIG. 1 is a perspective view illustrating a steering wheel to which a decorative member according to the first embodiment is mounted. 2 is a perspective view showing the decorative member, and FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG.
In the following description, the front-rear direction and the left-right direction mean the front-rear direction in plan view when the steering wheel shown in FIG. 1 is held in a neutral position so that the rim portion is disposed on a horizontal plane, Say left and right. The upper direction refers to the front side (front side) direction of the steering wheel as viewed from the driver side, and the lower side refers to the rear side (back side) direction of the steering wheel.

  A steering wheel 10 according to the first embodiment includes a steering wheel main body 11, a steering pad 20 that is attached to a central portion of the steering wheel main body 11 and can move downward when pressed, and the steering pad 20 An unillustrated airbag device mounted inside the vehicle, a pair of left and right finishers 12 attached to the steering wheel main body 11 on both the left and right sides of the steering pad 20, and a synthetic resin body cover (lower cover) that covers the back side of the steering wheel main body 11 13).

  In this case, the steering wheel body 11 includes a boss portion (not shown) to which the steering shaft is connected, an annular rim portion 11a that is gripped by the driver, and a plurality of spoke portions 11b that connect the boss portion and the rim portion 11a. Have. The left and right finishers 12 are arranged at positions on the left and right sides of the steering pad 20 on the upper surface side of the boss portion so as to extend from the left or right spoke portion 11b to the lower spoke portion 11b. The finisher 12 is molded using a synthetic resin and has a surface appearance that exhibits a metallic tone.

  In the present invention, the configurations of the steering wheel main body 11, the airbag device, the finisher 12, and the body cover 13 are not particularly limited, and can be arbitrarily changed. For example, an operation button or the like for operating an audio device or a car navigation device can be disposed on the finisher 12 of the steering wheel 10 shown in FIG.

  The steering pad 20 according to the first embodiment includes a base member 21 made of a thermoplastic resin or an olefin-based elastomer, and a skin material 30 attached to the surface of the base member 21. Further, the base member 21 is integrated with the vertical wall portion 23 that is disposed so as to surround the airbag device and constitutes the airbag housing portion, and the upper end portion of the vertical wall portion 23, so that the driver of the steering pad 20 And a front plate portion 24 that forms an outer surface shape that opposes the outer surface.

  The vertical wall portion 23 of the base member 21 has four side wall portions that are arranged on the front, rear, left, and right so that the cross section perpendicular to the vertical direction has a substantially rectangular shape. A plurality of insertion holes 23a for allowing insertion of rivets for fixing the bag device are formed.

  The front plate portion 24 of the base member 21 is disposed on the inner side of the vertical wall portion 23, and a cover portion 25 that covers the upper surface side of the airbag device, and an extension that extends outward from the vertical wall portion 23. And an exit portion 26. In this case, the airbag housing portion is configured by the vertical wall portion 23 and the lid portion 25 of the base member 21. The front plate portion 24 can employ various shapes depending on the design of the steering wheel 10 and the like.

  The lid portion 25 of the front plate portion 24 is formed in a concave groove shape on the back surface (lower surface) side of the lid portion 25, and a tear line 25a that can be broken by receiving the inflation pressure of the airbag during operation of the airbag device; The door part 25b which forms a door part by fracture | rupture of the tear line 25a, and the base end part 25c distribute | arranged between the door expected part 25b and the vertical wall part 23 are provided.

  As shown in FIG. 2, the front end portion of the front plate portion 24 (extension portion 26) is formed by being bent downward so as to correspond to the shape of the left and right spoke portions 11 b of the steering wheel body 11. Further, the left and right side edge portions of the front plate portion 24 also have a shape bent downward as shown in FIGS. 2 and 3. Furthermore, left and right receiving groove portions that can hold stitched portions 35 of first and second base cloths 31 and 32 (to be described later) of the skin material 30 on the upper surface at a position slightly inside the left and right side edge portions of the front plate portion 24. 27 are continuously formed along the left and right side edges of the front plate portion 24 while being slightly inclined with respect to the front-rear direction.

  The housing groove portion 27 of the first embodiment is recessed so as to be recessed with respect to the main upper surface of the front plate portion 24, and includes a bottom surface portion 27a disposed substantially parallel to the main upper surface, and an inner side wall portion rising from the bottom surface portion 27a. 27b and an outer side wall portion 27c. Here, the main upper surface of the front plate portion 24 refers to a smooth upper surface formed continuously including the upper surface of the lid portion 25 in the front plate portion 24.

  In this case, the surface portion (main upper surface portion) of the main upper surface of the front plate portion 24 forms a first surface portion 28a to which the first base fabric 31 of the skin material 30 is attached, as shown in FIG. The bottom surface portion 27a and the outer side wall portion 27c of the housing groove portion 27 and the surface portion arranged outside the housing groove portion 27 of the front plate portion 24 are the second surface to which the second base cloth 32 of the skin material 30 is attached. A portion 28b is formed. Further, the inner side wall portion 27b of the accommodation groove portion 27 forms a stepped portion 28c disposed between the first surface portion 28a and the second surface portion 28b.

  The dimension in the height direction (vertical direction) from the bottom surface of the accommodation groove portion 27 to the main upper surface of the surface plate portion 24 in the stepped portion 28c corresponds to the thickness of the stitching portion 35 described later of the surface material 30. The thickness of the stitched portion 35 is set to be absorbed by the receiving groove 27 when the 30 is attached to the front plate portion 24, and thereby the outer surface of the skin material 30 attached to the first surface portion 28 a. The (upper surface) and the outer surface (upper surface) of the stitching portion 35 accommodated in the accommodation groove 27 can be formed as a single continuous smooth surface without a step.

  Furthermore, in the first embodiment, as shown in FIG. 4, the main upper surface portion of the front plate portion 24 that forms the first surface portion 28a and the inner side wall portion 27b of the accommodation groove portion 27 that forms the step portion 28c are ridge lines. It is connected via a curved surface portion 28d formed in a curved surface shape so as not to be square. In addition, a plurality of fine uneven portions 29 are formed in the curved surface portion 28d in a streak shape along the length direction of the housing groove portion 27 as a reducing means for reducing the adhesive strength of the base member 21 to the skin material 30. ing.

  In particular, the plurality of fine uneven portions 29 in the curved surface portion 28d of the first embodiment are given from the first surface portion 28a of the front plate portion 24 to the inner side wall portion 27b of the accommodating groove portion 27 as shown in FIG. The concave portions 29a and the convex portions 29b each having a size are formed regularly and alternately with a predetermined interval. In this case, the curved surface formed by connecting the top ends of the convex portions 29 b is formed so as to be continuously and smoothly connected to the main upper surface of the front plate portion 24 and the side wall surface of the accommodating groove portion 27.

  Furthermore, in Example 1, the depth dimension of the concavo-convex portion 29 defined by the distance from the curved surface formed by connecting the top ends of the respective convex portions 29b to the valley bottom of the concave portion 29a is 0.1 mm or more and 0.5 mm or less. Preferably, it is set to 0.2 mm or more and 0.4 mm or less.

  By forming the plurality of concave and convex portions 29 with such depth dimensions on the curved surface portion 28d, the adhesive 22 applied to the surface of the convex portion 29b when the adhesive 22 is sprayed and applied to the curved surface portion 28d. Can be made to flow into the adjacent recesses 29a and be stored.

  Thereby, the amount of the adhesive 22 remaining on the surface of the convex portion 29b and exhibiting an adhesive force to the skin material 30 can be effectively reduced, and the adhesive 22 accumulated in the concave portion 29a is brought into contact with the skin material 30. This makes it difficult to prevent the accumulated adhesive 22 from exerting an adhesive force on the skin material 30.

  In the present invention, the form of the fine uneven portion 29 provided on the curved surface portion 28d is not limited, as long as it is possible to guide the adhesive applied to the surface of the convex portion into the concave portion as will be described later. For example, the concave portion and the convex portion may be provided in a streak shape along a direction orthogonal to the length direction of the receiving groove portion, and the concave portion and the convex portion may be randomly (randomly provided) without a specific shape. And the surface of the curved surface portion may be formed so as to exhibit a texture pattern. Furthermore, even when the concave portion or the convex portion does not have a specific shape, the depth dimension of the concave and convex portion is preferably set to a size within the above range.

  The plurality of fine uneven portions 29 in the first embodiment as described above correspond to the cavity surface of the portion for molding the curved surface portion 28d of the base member 21 in the molding die when the base member 21 is molded. By providing the uneven portion to be formed, it can be easily formed.

  In the present invention, the method of providing a plurality of fine uneven portions 29 on the curved surface portion 28d of the base member 21 is not particularly limited. For example, a base member having no uneven portions on the curved surface portion is injection molded. It is also possible to form the concavo-convex portion by subjecting the curved surface portion of the molded base member to physical processing such as cutting or sandblasting, or chemical treatment by etching.

  The skin material 30 in the first embodiment includes a first base cloth 31 adhered to the main upper surface of the front plate portion 24, and a pair of left and right second base cloths sewn to the left and right side edges of the first base cloth 31. The first base fabric 31 and the second base fabric 32 are formed by cutting natural leather or synthetic leather into a predetermined shape. Moreover, the 1st base fabric 31 and the 2nd base fabric 32 are provided with the elasticity which can be expanded and contracted slightly. In addition, in this invention, the material of the 1st base fabric 31 and the 2nd base fabric 32 is not specifically limited, It can change arbitrarily.

  In addition, an emblem 31 a as a decorative body is attached to a portion of the first base fabric 31 that is substantially the center of the front plate portion 24. Further, the first base fabric 31 has a plurality of small pinholes 31 b penetrating from the upper surface side to the lower surface side of the first base fabric 31 along the position of the tear line 25 a formed in the front plate portion 24 of the base member 21. It is drilled by laser processing.

  Since the plurality of pinholes 31b are formed, when the air bag device (not shown) is operated and the base member 21 receives the inflation pressure of the air bag, the tear line 25a is broken, so that the skin material 30 is also It can be broken along the tear line 25a. Accordingly, it is possible to stably form an opening for inflating and deploying the airbag in the steering pad 20. Each pinhole 31b has a diameter on the upper surface side of the first base fabric 31 that is so small that the pinhole 31b cannot be seen when the steering pad 20 is viewed from the upper surface side. .

The skin material 30 is produced in a bilaterally symmetric shape with respect to the central portion in the left-right direction by joining the left and right second base fabrics 32 to the left and right side edges of the first base fabric 31 by sewing. ing.
Here, a method for stitching the first base fabric 31 and the second base fabric 32 on the left side will be specifically described.

  First, the first surface on the outer surface side of the first base fabric 31 and the second surface are arranged so that the positions of the left end surface of the first base fabric 31 and the right end surface (inner side end surface) of the second base fabric 32 are aligned. The 1st base cloth 31 and the 2nd base cloth 32 are piled up in the direction which the 1st surface used as the outer surface side of base cloth 32 mutually opposes. At this time, if there is a cutting error in the first base cloth 31 or the second base cloth 32 cut into a predetermined shape, the position of the left end surface of the first base cloth 31 and the second base cloth 32 By adjusting the position of the right end surface and overlapping the first and second base fabrics 31, 32, it is possible to absorb the cutting error.

  Next, in a state where the first base cloth 31 and the second base cloth 32 are overlapped, the left side edge part of the first base cloth 31 and the inner side edge part (right side edge part) of the second base cloth 32, The stitching is performed at a position slightly inside from the position of the left end face of the first base cloth 31 and the right end face of the second base cloth 32 that are aligned. At this time, a first seam line (first seam line) 35 a for stitching the first base cloth 31 and the second base cloth 32 is formed along the side end surfaces of the first and second base cloths 31 and 32.

  After the first base fabric 31 and the second base fabric 32 are stitched together at the first seam line 35a, the first base cloth 31 is exposed so that the first surface of the first base cloth 31 is exposed, and the first seam line Fold it in a U-shape along 35a. At this time, the first seam line 35 a is hidden on the inner surface (back surface) side of the folded first base fabric 31. Subsequently, the first base fabric 31 is held at a position between the first seam line 35a and the side end surfaces of the first and second base fabrics 31 and 32 while the first base fabric 31 is kept folded. The folded portion 31 and the second base fabric 32 are sewn together at the second seam line 35b.

  Accordingly, the first base cloth 31 and the left second base cloth 32 are integrated with each other at the stitching part (joining part) 35 having the first stitch line 35a and the second stitch line 35b. . In this case, the second seam line 35 b is expressed as a pattern on the outer surface of the first base fabric 31, thereby enhancing the design of the skin material 30. Further, the stitching portion 35 serves as a base fabric switching unit in which the color tone and / or texture of the skin material 30 is switched between the first base fabric 31 and the second base fabric 32.

  As described above, the first base cloth 31 and the left second base cloth 32 are sewn together (or after the stitching), and at the same time, the right edge of the first base cloth 31 and the right second base cloth 32 However, the first stitch line 35a and the second stitch line 35b are sewn together in the same procedure as that of the second base fabric 32 on the left side.

  As a result, the first base cloth 31 and the left and right second base cloths 32 are overlapped on the inner side edge parts of the left and right second base cloths 32 with the left and right side edge parts of the first base cloth 31 folded back. In this state, the skin material 30 integrated with stitching is produced. As described above, the skin material 30 in which the first base fabric 31 and the left and right second base fabrics 32 are sewn together by the first seam line 35a and the second seam line 35b, the first and second bases that are switched at the seam portion 35. The cloths 31 and 32 are provided with two kinds of colors and / or textures, and the steering pad 20 can have a high-class feeling and excellent design.

  In the first embodiment, the first base cloth 31 and the left and right second base cloths 32 are integrated by sewing. However, in the present invention, the first base cloth 31 and the second base cloth 32 are joined. The means to do is not specifically limited, For example, the skin material 30 can also be produced by joining and integrating the first base fabric 31 and the second base fabric 32 by adhesion or welding.

  Next, in order to attach the skin material 30 produced as described above to the surface of the base member 21, first, the upper surface of the front plate portion 24 of the base member 21 and the lower surfaces of the left and right side edge portions of the front plate portion 24. The adhesive 22 is sprayed from the nozzle and sprayed on the back surface. At this time, for example, a chloroprene rubber-based liquid adhesive 22 is preferably used as the adhesive 22. Moreover, as a nozzle which injects the adhesive agent 22, it is preferable to use the nozzle with which the diameter of the nozzle was set to 2.0 mm or more and 2.5 mm or less.

  By spraying the adhesive 22 using the nozzle, the adhesive 22 is applied to the entire upper surface of the front plate portion 24 of the base member 21. At this time, the main upper surface portion (first surface portion) of the front plate portion 24 is used. 28a) and a curved surface portion 28d disposed between the inner side wall portion 27b (stepped portion 28c) of the accommodation groove portion 27, a plurality of fine uneven portions 29 are formed.

  Therefore, among the adhesive 22 applied to the curved surface portion 28d, the adhesive 22 on the convex portion 29b flows in so as to be sucked into the valley bottom of the concave portion 29a by the weight of the adhesive 22 and is shown in FIG. Thus, the amount (thickness) of the adhesive 22 on the convex portion 29b can be reduced at the same time that the adhesive 22 is accumulated in each concave portion 29a of the curved surface portion 28d. In the present invention, for example, an adhesive can be applied only to the top end portion of the convex portion 29b of the uneven portion 29 by applying the adhesive to the curved surface portion 28d using a roller or the like.

  Further, in the first embodiment, after the adhesive 22 is sprayed and applied to the base member 21, the base member 21 is exposed to a heated atmosphere, and a part of the adhesive 22 is pre-cured, whereby the curved surface portion 28d. The adhesive force of the adhesive 22 thinly applied on the convex portion 29b is intentionally reduced.

  After the base member 21 is treated in a heated atmosphere, the skin material 30 in which the first base fabric 31 and the left and right second base fabrics 32 are stitched together by the stitching portion 35 is placed on the surface plate portion 24 of the base member 21. To overlay. At this time, as shown in FIG. 3, the left and right stitched portions 35 of the skin material 30 are formed so that a space portion 37 is formed between the stitched portion 35 and the inner side wall portion 27 b of each housing groove portion 27. The first base cloth 31 disposed between the left and right stitching portions 35 of the skin member 30 is disposed between the left and right accommodation groove portions 27 of the base member 21 while being inserted and accommodated in the left and right accommodation groove portions 27 of the base member 21. It covers the main upper surface of the surface plate part 24 to be applied.

  As described above, in the first embodiment, between the end surfaces of the first and second base cloths 31 and 32 in the stitching portion 35 of the skin material 30 and the side wall surface of the inner side wall portion 27b of the housing groove portion 27 of the base member 21. By covering the base member 21 with the skin material 30 so that the space portion 37 is formed, for example, when a cutting error occurs in the first base cloth 31 or the second base cloth 32, the cutting error is absorbed. Even when the position of the side end surface of the first base fabric 31 and the side end surface of the second base fabric 32 is shifted from each other, the stitched portion 35 of the skin material 30 is stably accommodated in the accommodating groove portion 27 of the base member 21. be able to.

  Further, as described above, the stitching portion 35 of the skin material 30 is inserted into the receiving groove portion 27 of the base member 21, and the second base cloth 32 disposed outside the left and right stitching portions 35 of the skin material 30 is replaced with the base member. 21 is attached so as to be in close contact with the outer side wall portion 27c of the accommodating groove portion 27 and the left and right side edge portions of the front plate portion 24. Further, the second base cloth 32 of the skin material 30 is made to wrap around the lower surface (back surface) side of the left and right side edge portions of the front plate portion 24 of the base member 21, and the left and right side edges of the front plate portion 24 are set to the second base edge. Affix with a cloth 32.

  Then, after covering and pasting the skin material 30 on the surface plate portion 24 of the base member 21, the pressing member is pressed against the outer surface side of the skin material 30, and the skin material 30 is elastically directed toward the base member 21. By pressing, the skin material 30 can be firmly and cleanly (crimped) to the base member 21. At this time, since the space portion 37 is formed between the stitching portion 35 of the skin material 30 and the inner side wall portion 27b of the accommodation groove portion 27 of the base member 21, the skin material 30 ( The first base fabric 31) is press-fitted into the space 37.

  Thereafter, when the pressing by the pressing member is released, in the first embodiment, the curved surface portion 28d is formed between the main upper surface portion of the front plate portion 24 and the inner side wall portion 27b of the receiving groove portion 27 in the base member 21. Therefore, even if the space portion 37 is formed between the stitching portion 35 of the skin material 30 and the inner side wall portion 27b of the accommodation groove portion 27 of the base member 21, the upper surface of the skin material 30 adhered to the base member 21. It is possible to prevent a streak line from appearing on the (outer surface) side.

  Furthermore, in the first embodiment, the plurality of fine uneven portions 29 are formed on the curved surface portion 28d of the base member 21 to which the adhesive 22 is applied, so that the adhesive 22 on the convex portion 29b is applied as described above. The adhesive force of the adhesive 22 on the convex portion 29b is lowered by flowing into the valley bottom side of the concave portion 29a (see FIG. 5).

  In addition, since the uneven portion 29 is formed on the curved surface portion 28d, when the skin material 30 is attached to the curved surface portion 28d, the skin material 30 is bonded to each convex portion 29b, but the concave portion 29a and the skin material are provided. A gap is formed between the first base fabric 31 and the non-adhesive portion where the first base fabric 31 is not bonded. As described above, the non-adhesive portion that prevents the adhesion with the skin material 30 is formed in each concave portion 29a of the curved surface portion 28d, thereby reducing the effective adhesion area of the curved surface portion 28d to the skin material 30 and thereby the skin. The adhesive force (adhesive strength) to the material 30 can be weakened.

  That is, in the curved surface portion 28d of the base member 21, the amount of the adhesive 22 on the convex portion 29b is reduced, and the non-adhesive portion by the concave portion 29a is formed, so that the adhesive force to the skin material 30 is locally effective. Weakened. Therefore, the base material 21 other than the curved surface portion 28d is released by elastically pressing the skin material 30 toward the base member 21 with a press member and pressing the skin material 30 against the base member 21 and then releasing the press. The surface material 30 is fixed in a state where the skin material 30 is firmly adhered, but the elastic material (tension) of the skin material 30 acts on the curved surface portion 28d of the base member 21 so that the skin material 30 is fixed in an adhesive state. Instead, it easily elastically returns from the curved state along the curved surface portion 28d to the planar state before pressing.

  As a result, it is possible to prevent the concave portion 66 having a slightly depressed shape as described with reference to FIG. 7 from being formed on the outer surface of the skin material 30, or the concave portion 66 is formed on the outer surface of the skin material 30. Even so, it is possible to reduce the depth of the recess 66 and blur the recess 66 so that it is less noticeable.

  In the steering pad 20 according to the first embodiment to which the skin material 30 is attached as described above, the main upper surface portion (first surface portion 28a) of the base member 21 and the bottom surface portion 27a (second surface portion) of the accommodation groove portion 27. 28b), even if the step portion 28c corresponding to the thickness of the stitched portion (joint portion) 35 of the skin material 30 is formed between the outer surface of the skin material 30 and the outer surface of the skin material 30, the conventional discomfort is not felt. It is possible to prevent a streak-like line to be generated or a dent 66 having a slightly depressed shape from appearing, and a smooth surface can be formed. Thereby, the appearance quality of the steering pad 20 is improved, and a high-quality and good aesthetic feeling can be stably obtained.

  Moreover, in the steering pad 20 of the first embodiment, the stitching portion 35 of the skin material 30 is accommodated in the accommodation groove portion 27 of the base member 21, and the first base fabric 31 and the second base fabric 32 are positioned at substantially the same height position. Therefore, the surface of the first base fabric 31 and the surface of the second base fabric 32 can be seen as a continuous surface, and the appearance of the steering pad 20 is further enhanced.

  In the first embodiment, by providing a plurality of fine uneven portions 29 on the curved surface portion 28d of the base member 21, the effective bonding area of the curved surface portion 28d to the skin material 30 is reduced, so that the skin of the base member 21 A reducing means for reducing the adhesive strength to the material 30 is configured.

  However, in the present invention, the means for reducing the adhesive strength is such that, for example, the curved surface portion 28d of the base member 21 is not provided with the fine uneven portion 29, but the curved surface portion 28d is formed into a smooth curved surface shape, and the curved surface portion After applying the adhesive 22 to 28d, a plurality of fine powders (powder fine particles) may be sprayed and adhered. In this case, for example, sand having fine particles or a grindstone having a particle size of about 200 μm to 800 μm (preferably 500 μm) is preferably used as the fine powdery substance to be attached to the curved surface portion.

  In addition, after applying the adhesive 22 to the curved surface portion 28d formed into a smooth curved surface, an oil resin that reduces the activity of the adhesive 22 is applied to the curved surface portion 28d with a roller or the like. Reduction means for reducing the adhesive strength of the base member 21 to the skin material 30 may be configured.

  Moreover, in Example 1 mentioned above, although the concave accommodation groove part 27 which accommodates the stitching | suture part 35 of the skin material 30 is provided in the base member 21, this invention is using the 1st base fabric 31 of the base member 21. As shown in FIG. If the step part 28c with respect to the thickness of the stitching part 35 of the skin material 30 is formed between the first surface part 28a to be attached and the second surface part 28b to which the second base cloth 32 is attached, a concave shape is formed. The present invention can also be applied to a steering pad that does not have the shape of the receiving groove 27.

  That is, in the accommodation groove portion 27 of the base member 21 in the first embodiment described above, the second surface portion 28b to which the second base cloth 32 is adhered is the bottom surface portion 27a of the accommodation groove portion 27, the outer side wall portion 27c of the accommodation groove portion 27, The second base fabric 32 is formed by a surface portion disposed outside the housing groove portion 27, and the second base cloth 32 is bent outwardly from the bottom surface portion 27 a of the housing groove portion 27 while being bent in a crank shape. It is affixed to 28b.

  However, in the present invention, for example, as shown in FIG. 6 showing a modification of the base member, the base member 41 does not include the accommodation groove 27 as in the first embodiment, and the first base fabric 31 is attached. A first surface portion 48a to be formed, and a planar second surface portion 48b which is formed at a low level from the first surface portion 48a through the stepped portion 48c and to which the second base fabric 32 is adhered. Can be applied as well. In this case, a curved surface portion 48d is provided between the first surface portion 48a and the stepped portion 48c. The curved surface portion 48d is formed with a plurality of fine uneven portions 49 as means for reducing the adhesive strength.

  After spraying and applying an adhesive to the surface of the base member 41 of FIG. 6 having such a curved surface portion 48d, the first and second base fabrics are stitched portions as in the case of the first embodiment. The stitched skin material is covered so that a space portion is formed between the stitched portion and the stepped portion 48c, and the pressing member is pressed against the outer surface side of the skin material and elastically pressed. Accordingly, a steering pad in which the skin material is bonded and fixed to the base member 41 is manufactured.

  Even in the steering pad manufactured in this way, it is possible to prevent the appearance of a streak-like line that causes an uncomfortable appearance on the outer surface of the skin material adhered to the base member 41 or a dent portion having a slightly depressed shape. Therefore, the appearance quality of the steering pad is improved, and a high-quality and good aesthetic feeling can be stably obtained.

DESCRIPTION OF SYMBOLS 10 Steering wheel 11 Steering wheel main body 11a Rim part 11b Spoke part 12 Finisher 13 Body cover (lower cover)
DESCRIPTION OF SYMBOLS 20 Steering pad 21 Base member 22 Adhesive agent 23 Vertical wall part 23a Insertion hole 24 Front plate part 25 Cover part 25a Tear line 25b Plan door part 25c Base end part 26 Extension part 27 Accommodation groove part 27a Bottom part 27b Inner side wall part 27c Outer side wall Part 28a first surface part 28b second surface part 28c step part 28d curved surface part 29 uneven part 29a concave part 29b convex part 30 skin material 31 first base cloth 31a emblem 31b pinhole 32 second base cloth 35 stitching part (joining part)
35a First seam line (first seam line)
35b Second seam line 37 Space portion 41 Base member 48a First surface portion 48b Second surface portion 48c Stepped portion 48d Curved surface portion 49 Uneven portion

Claims (4)

A base member, and a skin material adhered to the surface of the base member by an adhesive, wherein the skin material includes a first base fabric, a second base fabric, and an edge portion of the second base fabric. A joining portion that joins the edge portions of the first base fabric on top of each other, and the base member includes a first surface portion to which the first base fabric is attached, and a first surface portion. A step disposed at a low level and disposed between the second surface portion to which the second base fabric is adhered and the thickness of the joint portion between the first surface portion and the second surface portion. A decorative member in which a space is provided between the joint portion of the skin material and the stepped portion of the base member, and the skin material is adhered to the base member,
The base member has a curved surface portion that connects the first surface portion and the stepped portion in a curved surface shape,
The curved surface portion includes a reducing means for reducing an adhesive strength to the skin material by mixing an adhesive portion to which the first base fabric adheres and a non-adhesive portion in which the adhesion to the first base fabric is prevented. Become
A decorative member characterized by that.   The decorative member according to claim 1, wherein the reducing means is configured by forming fine uneven portions on a surface of the curved surface portion.   The decorative member according to claim 1, wherein the reducing means is configured by attaching a plurality of fine powders to the surface of the curved surface portion. The base member has a concave housing groove that houses the joint of the skin material,
The second surface portion is disposed on a bottom surface portion of the receiving groove portion,
The step portion is arranged on a side wall surface portion of the receiving groove portion.
The decorative member according to any one of claims 1 to 3.

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