JP2006175890A - Steering wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering wheel capable of effectively preventing deformation of a decorating member and maintaining or improving quality. <P>SOLUTION: In a wooden decorating piece 32 of this steering wheel 10, a reinforcing plate 42 is fixed to a rim part 22 side of the decorating piece 32 by a screw 44. The decorating piece 32 is mounted on a wheel main body 12 by passing base parts 52 of connecting pieces 48 and 56 provided on the reinforcing plate 42 and a coming-off preventing piece 54 through a through-hole 58 formed on the rim part 22. In this case, the reinforcing plate 42 has higher rigidity than that in the wood constituting the decorating piece 32. As a result, the reinforcing plate 42 effectively regulates deformation of the decorating piece 32 by the rigidity, even if the decorating piece 32 is deformed by a change of temperature or humidity. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steering wheel for steering a vehicle, for example, by a rotating operation.

  A so-called steering wheel is applied as an operation means of the vehicle steering device. The steering wheel includes a ring-shaped rim portion. A hub is provided inside the rim portion and at a position displaced from the rim portion on the opposite side of the driver's seat occupant. The hub and the rim portion are integrated by one or more spoke portions. It is connected to.

  The hub is coaxially and integrally connected to the steering shaft, and when the rim portion is rotated in the circumferential direction, the rotational force applied to the rim portion is transmitted to the steering shaft via the spoke portion and the hub, and the steering is performed. The shaft is rotated about its axis. In this way, by rotating the steering shaft, for example, the rotation axis of the front wheel of the vehicle is inclined around an axis whose axial direction is substantially the vehicle vertical direction.

  On the other hand, in the steering wheel as described above, the periphery of the rim part is covered with urethane, leather, etc., but recently, in order to improve the design of the steering wheel, it is formed with a part of the rim part with wood etc. The structure which provides the decorated member made is devised, The example is disclosed by the following patent document 1. FIG.

  In the steering wheel disclosed in Patent Document 1, a cracked locking portion projects from a decorative member called a finisher. The engaging portion is inserted into a through hole formed in the rim portion of the metal core of the steering wheel against the elasticity of the front end side, and the engaging portion penetrates the through hole.

When the tip of the latching portion enters inside the rim portion having a concave cross section through the through hole, the tip of the latching portion is restored, and the tip of the latching portion is lateral to the through hole on the inner surface of the rim Interfere. As a result, the locking portion is prevented from coming off, and the finisher is attached to the steering wheel.
JP 2000-85587 A

  By the way, when the decoration member as described above is made of wood, a deformation such as “warping” occurs in the decoration member due to a change in temperature or humidity in the vehicle compartment, and the decoration member is partially steered. As a result, the overall quality including the appearance quality is lowered.

  In view of the above facts, an object of the present invention is to obtain a steering wheel that can effectively prevent deformation of a decorative member and maintain or improve quality.

  The steering wheel according to the first aspect of the present invention is set to the wheel body having a mandrel that is mechanically connected to a vehicle steering device and is covered by a covering portion, and the wheel body. A decorative member that is provided in a predetermined mounting portion and decorates the wheel main body, and is integrally connected to the decorative member on the wheel main body side of the decorative member and is more rigid than the decorative member. A reinforcing member that restricts deformation of the decorating member and a connecting member that is mechanically connected to the core metal while being fixed to the reinforcing member.

  According to the steering wheel according to the first aspect of the present invention, the mandrel constituting the wheel main body is connected to the steering device of the vehicle, and the steering device is operated by operating the wheel main body. The vehicle is steered.

  Moreover, although the metal core of the wheel main body is covered with a covering portion, a mounting portion is set in advance on the wheel main body, and a decoration member is provided on the mounting portion. Thereby, a wheel main body is decorated by the taste different from a coating | coated part.

  The decorative member is integrally provided with a reinforcing member, and the decorative member is attached to the wheel body by connecting the connecting member provided on the reinforcing member to the cored bar. Here, the rigidity of the reinforcing member is higher than that of the decorative member. For this reason, by providing such a reinforcing member integrally with the decorative member, if the deformation such as “warping” is to occur in the decorative member, the reinforcing member restricts the deformation of the decorative member.

  Thereby, for example, even if the temperature or humidity in the vehicle interior changes, the decoration member is effectively prevented from being deformed, the shape of the decoration member can be maintained well, and the quality can be maintained.

  In addition, it does not specifically limit regarding the specific aspect of the mounting part of the wheel main body provided with a decorating member, For example, you may provide a coating | coated part also in a mounting part similarly to wheel main bodies other than a mounting part. In addition, the mounting portion may not be provided with a covering portion and the cored bar may be exposed. Furthermore, although the covering portion is provided also in the mounting portion, the aspect such as the thickness of the covering portion may be different from other portions.

  The steering wheel according to a second aspect of the present invention is the steering wheel according to the first aspect, wherein one end of the steering wheel is formed on the cored bar corresponding to the mounting portion and is provided on the mounting portion. The connecting member is provided with a retaining portion that restricts the movement of the decorating member in the direction away from the wheel body by entering the hole opened on the surface on the member side and pressing the inside of the hole with an elastic force. It is provided.

  According to the steering wheel according to the second aspect of the present invention, the cored bar is formed with a hole opened on the surface of the decorative member corresponding to the mounting part, and the retaining part provided in the connecting member However, when it enters this hole, the retaining portion presses against the inside of the hole due to its elasticity. In this way, the retaining portion is pressed against the inside of the hole, so that the retaining portion is prevented from coming out of the hole. Thereby, the movement of the reinforcing member in the direction away from the wheel main body, and consequently the movement of the decorative member is restricted.

  In this way, by separating the decorating member from the wheel body, the decorating member can be prevented from inadvertently falling off the wheel body.

  A steering wheel according to a third aspect of the present invention is the steering wheel according to the second aspect, wherein a plurality of the holes are formed in the cored bar, and the connecting member is provided corresponding to each of the plurality of the holes. A plurality of connecting members, and among the plurality of connecting members, a pressing direction of a part of the retaining portion with respect to the inside of the hole is different from a pressing direction with respect to the inside of the hole of another retaining portion. It is a feature.

  In the steering wheel according to the third aspect of the present invention, a plurality of holes are formed in the cored bar, and the decorative member is attached to the wheel main body by the retaining portion of the connecting member entering each of these holes.

  Here, in the steering wheel according to the present invention, the pressure-contact direction of the retaining portion with respect to the inside of some holes of the plurality of connecting members is different from the pressure-contact direction of the retaining portion with respect to the inside of the holes of the other connecting members.

  Thus, when the decorative member is attached to the wheel body, the pressure contact direction of the retaining portion is different, so that the decorative member is prevented from being biased and the decorative member is positioned with respect to the wheel body. Even if it does not perform specially, the decoration member can be positioned easily.

  A steering wheel according to a fourth aspect of the present invention is the steering wheel according to any one of the first to third aspects, wherein the first decorative portion is made of wood and the first decorative portion is provided. The decorative member is configured to include a second decorative portion that is formed of another wood having a different grain direction from the wood constituting the portion, and is integrally fixed to the first decorative portion. It is characterized by that.

  According to the steering wheel which concerns on this invention of Claim 4, a decoration member is comprised including the 1st decorating part and the 2nd decorating part integrally fixed to this 1st decorating part. Is done.

  Here, both of these 1st decoration parts and 2nd decoration parts are formed with wood. However, the direction of the grain is different between the first decorative portion and the second decorative portion. For this reason, the direction of deformation such as “warping” of the first decorative portion and the direction of deformation such as “warping” of the second decorative portion when a change in temperature or humidity occurs are different.

  As a result, even if a deformation such as “warping” occurs in one of the first decorative portion and the second decorative portion due to a change in temperature or humidity, the deformation in the same direction does not occur in either one. Therefore, any one of the deformations is regulated by either one. Thereby, a deformation | transformation of the whole decorating member can be prevented effectively.

  In addition, this invention should just be a structure with which a decorating member is provided with the 1st decorating part and the 2nd decorating part, and a decorating member is comprised only with a 1st decorating part and a 2nd decorating part. It is not limited to that. That is, for example, the decorative member may include another decorative part different from the first decorative part and the second decorative part. In addition, when a plurality of pieces of wood are joined to the decorative member in the form of two or more layers, the wood constituting any one layer is used as the first decorating portion, and the wood constituting any one other layer is the first wood. It is good also as 2 decoration parts.

  As described above, in the steering wheel according to the present invention, the connecting member for connecting the decorative member to the rim portion is provided on the reinforcing member having higher rigidity than the decorative member, and the reinforcing member is used as the decorative member. By being provided integrally, if a deformation such as “warping” occurs in the decorative member, this deformation is restricted by the reinforcing member. For this reason, generation | occurrence | production of a deformation | transformation of a decorating member can be prevented effectively and quality can be maintained or improved.

<Configuration of First Embodiment>
FIG. 6 shows an exploded perspective view of the steering wheel 10 according to the first embodiment of the present invention, and FIG. 7 shows a plan view of the steering wheel 10.

  As shown in these drawings, the steering wheel 10 includes a wheel body 12. As shown in FIG. 6, the wheel main body 12 is configured to include a core metal 14 and a covering portion 16. The metal core 14 is formed by die-casting an alloy containing a metal such as aluminum or magnesium as a whole.

  The cored bar 14 includes a hub (not shown). The hub is generally formed in a substantially cylindrical shape or a ring shape, and is coaxially and integrally attached to a distal end portion of a steering shaft constituting a steering device for a vehicle. Further, a pad portion 20 shown in FIG. 7 is provided on the hub side in the axial direction on the occupant side (the side opposite to the steering shaft). A horn switch or a driver's seat constituting a vehicle alarm device is provided on the pad portion 20. An air bag device for use is accommodated.

  Further, as shown in FIG. 6, the cored bar 14 includes a rim portion 22. The rim portion 22 is formed in a ring shape as a whole, and is provided so as to be displaced toward the occupant side along the axial direction of the hub with respect to the hub.

  As shown in FIG. 6 and FIG. 2 and the like, the rim portion 22 is formed in a concave shape whose cross-sectional shape is opened toward the axial hub side, and a part of the inner periphery of the rim portion 22 on the opening end side is formed. One end of one or a plurality of spoke parts (not shown) that constitute the core metal 14 together with the rim part 22 is connected. The spoke part is formed in a longitudinal direction along the inner and outer directions of the rim part 22, the other end is connected to the hub, and the rim part 22 is indirectly connected to the hub.

  Further, as shown in FIG. 6, a covering portion 16 is provided in the vicinity of a connecting portion between the rim portion 22 and the rim portion 22 of the spoke portion. As shown in FIG. 2, the covering portion 16 includes a urethane portion 26 formed of a urethane resin. The urethane portion 26 covers the vicinity of the connecting portion between the rim portion 22 and the rim portion 22 of the spoke portion from the outside. The outer side of the urethane part 26 is covered with a leather part 28 formed of natural leather or artificial leather constituting the covering part 16 together with the urethane part 26.

  Further, as shown in FIG. 6 and more specifically in FIGS. 1 and 2, a part of the rim portion 22 faces the occupant side of the rim portion 22 when the steering wheel 10 is attached to the steering shaft. An exposed portion 30 as a mounting portion is formed in the portion. In the portion where the exposed portion 30 is formed, the covering portion 16 is not formed on the rim portion 22, and the rim portion 22 (that is, the core metal 14) is exposed.

  The steering wheel 10 is provided with a decorative piece 32 as a decorative member corresponding to the exposed portion 30. The decorative piece 32 includes a first decorative portion 34. The 1st decoration part 34 is formed in plate shape with the timber. Further, as shown in FIG. 1, the first decorating portion 34 is arranged in the thickness direction so that the center of curvature thereof substantially coincides with the center of the rim portion 22 in a state where the decorating piece 32 is arranged on the exposed portion 30. Curved in the direction.

  Further, as shown in FIG. 2, the first decorative portion 34 is disposed on one side in the thickness direction (the occupant side in a state where the decorative piece 32 is disposed on the exposed portion 30) together with the first decorative portion 34. The 2nd decorating part 36 which comprises the decorating piece 32 is provided. The second decorating part 36 is formed in a plate shape with wood having a different grain state from the first decorating part 34, and is integrally fixed to the first decorating part 34 by fixing means such as an adhesive. Yes.

  Similarly to the first decorating part 34, the second decorating part 36 has a thickness such that the center of curvature thereof substantially coincides with the center of the rim part 22 in a state where the decorating piece 32 is arranged on the exposed part 30. The direction is curved in the axial direction.

  Further, the decorative piece 32 has a curved surface located on the extension of the covering portion 16 along the circumferential direction of the rim portion 22 of the exposed portion 30 in a state where the surface of the decorative piece 32 is disposed on the exposed portion 30. Yes.

  As shown in FIG. 5, a flat fixing surface 38 is formed on the decorative piece 32 having the above configuration. The fixing surface 38 faces the exposed portion of the rim portion 22 exposed at the exposed portion 30 in a state where the decorative piece 32 is disposed on the exposed portion 30. An adhesive is applied to the fixing surface 38, and the decorative piece 32 is fixed to the surface of the rim portion 22 at the exposed portion 30 by this adhesive.

  Further, a mounting groove 40 is formed on the fixing surface 38. The mounting groove 40 is formed uniformly and continuously along the longitudinal direction of the first decorative portion 34 at the approximate center in the width direction of the second decorative portion 36.

  As shown in FIGS. 1 and 4, the mounting groove 40 is integrally fixed to the decorative piece 32 with a screw 44 in a state in which a reinforcing plate 42 as a reinforcing member is fitted. The reinforcing plate 42 is formed in a plate shape with a material having higher rigidity than the material constituting the decorative piece 32, such as stainless steel, and, like the first decorative portion 34 and the second decorative portion 36, It is curved around an axis whose axial direction is the thickness direction.

  A plurality of elongated holes 46 penetrating along the thickness direction are formed in the central portion of the reinforcing plate 42 in the width direction. These long holes 46 are, for example, slit-like holes that are linearly elongated along the tangential direction of the reinforcing plate 42 at the position where the reinforcing plate 42 is formed, and are predetermined along the longitudinal direction of the reinforcing plate 42. It is formed at intervals.

  The reinforcing plate 42 is provided with a plurality of connecting pieces 48 each serving as a connecting member. As shown in FIG. 2, the connecting piece 48 includes a fixing portion 50. The fixing portion 50 is formed in a rectangular thin plate shape in plan view, and on one side in the width direction of the long hole 46 on one side in the thickness direction of the reinforcing plate 42 (the reinforcing plate 42 is provided in the mounting groove 40). When fitted, it is integrally fixed to the bottom surface of the mounting groove 40 by spot welding or the like.

  A base 52 is continuously formed from one end in the width direction of the fixing portion 50. The base portion 52 is formed in a plate shape whose width dimension is equal to or smaller than the longitudinal dimension of the long hole 46, is bent at approximately 90 degrees at the connecting portion with one end in the width direction of the fixing portion 50, and penetrates the long hole 46. is doing.

  A retaining piece 54 as a retaining portion is continuously formed at the end of the base 52 opposite to the fixing portion 50. The retaining piece 54 is formed in a plate shape having a width dimension substantially equal to the width dimension of the base portion 52, and is structurally folded on the side opposite to the fixing portion 50 of the base portion 52 and beyond the passage portion of the long hole 46. Thus, it can be elastically displaced around the connecting portion with the base 52.

  As shown in FIGS. 1 and 3, the reinforcing plate 42 is provided with a plurality of connecting pieces 56 each serving as a connecting member. These connecting pieces 56 have basically the same structure as the connecting piece 48, but the fixing position of the fixing portion 50 to the reinforcing plate 42 is the side on the other side in the width direction of the long hole 46. Since the base portion 52 penetrates the long hole 46 in a state where the fixing portion 50 is fixed to the reinforcing plate 42 at a certain position, the formation position (bending direction) of the retaining piece 54 with respect to the base portion 52 is opposite to the connecting piece 48. (In other words, in order to make the bending direction of the retaining piece 54 of the connecting piece 56 opposite to the connecting piece 48, the fixing position of the fixing portion 50 on the reinforcing plate 42 is the other in the width direction of the long hole 46. And the side of the side.)

  As shown in FIG. 1, the connecting pieces 48 and the connecting pieces 56 are provided alternately along the longitudinal direction of the reinforcing plate 42.

  Corresponding to the base portion 52 and the retaining piece 54 of the connecting pieces 48 and 56, the rim portion 22 is formed with a through hole 58 corresponding to the “hole” in the claims. The through hole 58 is a straight hole along the tangential direction of the rim portion 22 at the formation position in the rim portion 22, and one end of the through hole 58 is opened on the surface of the rim portion 22 opened at the exposed portion 30. An opening is formed inside the rim portion 22.

  As shown in FIGS. 2 and 3, in the state where the decorative piece 32 to which the reinforcing plate 42 is fixed is disposed in the exposed portion 30, the base portion 52 of the connecting pieces 48 and 56 penetrates the through hole 58.

  With the base 52 penetrating the through hole 58, the inner wall 60 constituting the rim 22 having a concave cross section that opens toward the inside of the rim 22, that is, toward the hub, and the radial direction of the rim 22. A retaining piece 54 is located outside the inner wall 60 and between the inner wall 62 facing the inner wall 60, and the distal end of the retaining piece 54 of the connecting piece 48 abuts against the inner wall 60 and the inner bottom portion 64 of the rim portion 22. Thus, the distal end of the retaining piece 54 of the connecting piece 56 is in contact with the inner wall 60 and the inner bottom portion 64 of the rim portion 22.

  Further, a ring-shaped weight 66 is disposed between the inner wall 60 and the inner wall 62. The weight 66 has a circular cross section, and its outer diameter is slightly smaller than the distance between the inner wall 60 and the inner wall 62, and is fitted between the inner wall 60 and the inner wall 62 from the opening end side of the rim portion 22, The opening end of the portion 22 is closed.

  A space surrounded by the inner walls 60 and 62, the rim portion 22, and the inner bottom portion 64 is filled with a synthetic resin material 68. At least a part of the base 52 and the retaining piece 54 is buried in the synthetic resin material 68. In this state, the synthetic resin material 68 is cured and fixed to the inner walls 60 and 62 and the weight 66.

  As described above, since the retaining piece 54 is in contact with the inner bottom portion 64, basically, the retaining piece 54 does not come out to the surface side of the rim portion 22 where the through hole 58 is exposed at the exposed portion 30. However, since the cured synthetic resin material 68 is integrally connected to the base 52 and the retaining piece 54, the base 52 is prevented from coming off from the through hole 58.

<Operation and Effect of First Embodiment>
Next, the operation and effect of the present embodiment will be described through the description of the assembly process of the steering wheel 10.

  In the present steering wheel 10, a weight 66 is fitted between the inner wall 60 and the inner wall 62 of the rim portion 22 of the metal core 14 formed by die casting or the like.

  Next, the urethane portion 26 of the covering portion 16 is formed in the rim portion 22 of the core metal 14 in which the weight 66 is fitted into the rim portion 22 or in the vicinity of the rim portion 22 in the spoke portion.

  The urethane portion 26 is formed by placing the core metal 14 inside a predetermined mold and filling the mold with urethane resin in this state. Further, natural leather or artificial leather is affixed to the portion of the core metal 14 where the urethane portion 26 is formed, thereby forming a leather portion 28 and a partially exposed portion 30 on the wheel body 12. It is formed.

  The decorative piece 32 is formed before, after, or in parallel with the manufacture of the wheel body 12 described above. The manufacture of the decoration piece 32 cuts the workpiece | work which fixed the wood which comprises the 1st decoration part 34, and the wood which comprises the 2nd decoration part 36 with the adhesive agent, and also grind | polished the surface. Above, it is formed by applying varnish or the like.

  A mounting groove 40 is formed on the fixing surface 38 of the decorative piece 32 formed in this way, and the reinforcing plate 42 in which the fixing portions 50 of the connecting pieces 48 and 56 are spot-welded is fitted into the mounting groove 40 in advance. The reinforcing plate 42 is integrally fixed to the decorative piece 32 by screws 44.

  Next, the wheel body 12 is filled with a synthetic resin material 68 melted from the opening end of the through hole 58 on the exposed portion 30 side in a space surrounded by the inner walls 60 and 62, the inner bottom portion 64, and the weight 66. Is done.

  In this state, the decorative piece 32 is attached to the wheel body 12. In this mounting step, the tips of the base portions 52 of the connecting piece 48 and the connecting piece 56 (that is, the end portion of the base portion 52 on the retaining piece 54 side) are applied to the opening end of the through hole 58 on the exposed portion 30 side. In this state, when the decorative piece 32 is pressed toward the rim portion 22, the retaining piece 54 is elastically displaced so as to approach the base portion 52.

  In such a displacement state of the retaining piece 54 that approaches the base 52, the retaining piece 54 generates a spring force in a direction away from the base 52. Here, as described above, the connecting piece 48 and the connecting piece 56 are opposite in the formation position of the retaining piece 54 with respect to the base 52.

  Therefore, as described above, when the decorative piece 32 is pressed toward the rim portion 22, the inner peripheral portion of the through hole 58 is pressed in the direction in which the retaining piece 54 opposes the connecting piece 48 and the connecting piece 56. To do. Due to the spring force of the retaining piece 54 of the connecting piece 48 and the spring force of the retaining piece 54 of the connecting piece 56, the decorative piece 32 moves inward and outward along the radial direction of the rim portion 22. It is held at a predetermined position without being biased.

  Next, the synthetic resin material 68 is cured in a state where the base portion 52 and the retaining piece 54 of the connecting pieces 48 and 56 enter between the inner wall 60 and the inner wall 62. In this way, the synthetic resin material 68 is cured, so that the synthetic resin material 68 is fixed to the inner walls 60 and 62 and the weight 66, and the portion embedded in the synthetic resin material 68 of the base 52 and the connecting piece 48 is the synthetic resin. It is integrally connected to the material 68.

  The base 52 is inserted between the inner wall 60 and the inner wall 62, and the distal end of the connecting piece 48 is in contact with the inner bottom 64 on the radially outer side or the inner side of the rim 22 than the through hole 58. . For this reason, when the base portion 52 is pulled toward the exposed portion 30 side, the connecting piece 48 is prevented from interfering with the inner bottom portion 64 and the base portion 52 is prevented from being pulled out from the through hole 58 toward the exposed portion 30 side.

  Further, as described above, in the state where the synthetic resin material 68 is cured, the base 52 and the connecting piece 48 and the synthetic resin material 68 are integrated. In this state, since the hardened synthetic resin material 68 is fixed to the inner walls 60 and 62 and the weight 66, the displacement of the synthetic resin material 68 itself is restricted in the first place.

  Even if the hardened synthetic resin material 68 is peeled off from the inner walls 60 and 62 and the weight 66, the base 52 and the retaining piece 54 are integrally connected to the hardened synthetic resin material 68. When pulling 52 toward the exposed portion 30 side, the synthetic resin material 68 tends to be displaced integrally toward the inner bottom portion 64 side. Since the cured synthetic resin material 68 is sufficiently larger than the through hole 58, even if the cured synthetic resin material 68 is displaced toward the inner bottom 64, the synthetic resin material 68 does not pass through the through hole 58. .

  Therefore, the base 52 integrally connected to the cured synthetic resin material 68 does not come out from the through hole 58 to the exposed portion 30 side.

  As described above, in the present steering wheel 10, the base 52 of the connecting pieces 48, 56 does not come out of the through hole 58 formed in the rim portion 22 as described above, and thus is fixed integrally to the reinforcing plate 42. The decorative piece 32 does not leave the exposed portion 30 of the rim portion 22, and the decorative piece 32 is stably attached to the rim portion 22.

  Here, in the present embodiment, wood is used for the decorative piece 32, but the reinforcing plate 42 having higher rigidity than the decorative piece 32 fitted in the mounting groove 40 is integrally fixed to the decorative piece 32. ing. For this reason, even if deformation such as “warping” occurs in the decorative piece 32 due to changes in temperature and humidity in the vehicle compartment, the reinforcing plate 42 that is integrally fixed to the decorative piece 32 is provided with the decorative piece 32. The deformation of the is tightly regulated.

  Thereby, even if a change occurs in the temperature and humidity in the vehicle compartment as described above, the decoration piece 32 is not greatly deformed, and the quality can be maintained.

  Moreover, in this Embodiment, the decoration piece 32 is formed by joining the 1st decoration part 34 and the 2nd decoration part 36. As shown in FIG. Here, as described above, the first decorative portion 34 and the second decorative portion 36 have different grain directions.

  For this reason, even if any one of the first decorative portion 34 and the second decorative portion 36 is deformed such as “warp”, any deformation such as “warp” in the same direction as either one of these It does not occur on the other side. As a result, any one of the deformations as described above is regulated by any one of the other joined to the one. Therefore, the decoration piece 32 is not greatly deformed by this, and the quality can be maintained.

  Moreover, in this Embodiment, it is the structure which provided the connection pieces 48 and 56 in the reinforcement board 42 comprised separately from the decoration piece 32. FIG. For this reason, the mechanical strength and spring property of the connecting pieces 48 and 56 are different from the material mechanical strength and spring property of the decorative piece 32. For this reason, even if the base 52 and the retaining piece 54 of the connecting pieces 48 and 56 are formed to be relatively thin, their mechanical strength and springiness can be sufficiently imparted to the connecting pieces 48 and 56. .

  Therefore, when the decorative piece 32 is attached to the exposed portion 30 or when the base portion 52 is about to be displaced in the direction of coming out of the through hole 58, the base portion 52 and the retaining piece 54 are not broken. Thereby, when fixing the decorating piece 32 to the exposed part 30, it is not necessary to pay excessive attention to the deformation of the base 52 and the retaining piece 54, and the workability of the mounting work of the decorating piece 32 to the exposed part 30 is eliminated. Is good.

  In the present embodiment, the surface of the rim portion 22 exposed at the exposed portion 30 and the fixing surface 38 of the decorative piece 32 are flat, but for example, the surface of the rim portion 22 exposed at the exposed portion 30 You may form the unevenness | corrugation which mutually meshes with the adhering surface 38 of the decorating piece 32. FIG. As described above, the unevenness formed on the surface of the rim portion 22 exposed by the exposed portion 30 and the unevenness formed on the fixing surface 38 of the decorative piece 32 mesh with each other, so that the surface of the rim portion 22 and the decorative surface are decorated. The bonding area of the piece 32 with the fixing surface 38 can be increased, the decorative piece 32 can be fixed to the exposed portion 30 more effectively, and the above deformation can be effectively regulated.

  In addition, in this Embodiment, although the decorating piece 32 as a decorating member was comprised by the 1st decorating part 34 and the 2nd decorating part 36, the present invention of Claim 1 thru | or 3 of this invention. From the viewpoint, the decorative member is not limited to the two-layer structure like the decorative piece 32, but is a single wood of only one of the first decorative portion 34 and the second decorative portion 36. You may comprise a decorating member.

  Moreover, in this Embodiment as mentioned above, although the decorating piece 32 as a decorating member was made into the 2 layer structure of the 1st decorating part 34 and the 2nd decorating part 36, the decorating piece 32 is 3 layers. The above structure is also acceptable. When it is set as such a structure of three or more layers, the decoration part (wood) which comprises any one layer of each layer turns into the 1st decoration part which comprises this invention of Claim 4, and other The decoration part (wood) which comprises any one layer turns into the 2nd decoration part which comprises this invention of Claim 4.

<Configuration of Second Embodiment>
Next, a second embodiment of the present invention will be described. In the description of the present embodiment, the same reference numerals are given to the same parts as those in the first embodiment, and the description thereof is omitted.

  FIG. 8 is an exploded perspective view of the main part of the steering wheel 80 according to the present embodiment.

  As shown in this figure, the steering wheel 80 includes a cored bar 84 that constitutes a wheel body 82. The cored bar 84 has basically the same configuration as the cored bar 14 in the first embodiment, but as shown in FIGS. 9 and 10, the occupant on the inner wall 60 side at the cross-sectional open end of the cored bar 84. An attachment portion 86 is formed continuously from the end on the opposite side (that is, the hub side).

  The attachment portion 86 is formed in a ring shape that is formed in the width direction along the axial direction of the rim portion 22, and substantially the inner wall 62 with the inner wall 60 side of the cored bar 84 facing away from the occupant. It is formed by setting longer than the side.

  Further, an exposed portion 88 as a mounting portion is formed in the wheel main body 82 including the core metal 84 in place of the exposed portion 30. The exposed portion 88 is the same as the exposed portion 30 in the first embodiment in that the rim portion 22 of the cored bar 84 is exposed. However, while the exposed portion 30 exposes only the occupant side surface of the rim portion 22, the exposed portion 88 has a surface facing the occupant side of the rim portion 22 and a radially inward side of the rim portion 22. Is exposed. .

  Further, the steering wheel 80 includes a decoration piece 90 as a decoration member. The decorative piece 90 is the same as the decorative piece 32 in that it is curved with the center of the rim portion 22 as the center of curvature, but unlike the decorative piece 32, the cross section is substantially L-shaped by a single piece of wood ( More precisely, it is formed in a shape obtained by vertically inverting the “L” shape.

  More specifically, the decorative piece 90 includes an upper wall 92. The upper wall 92 is provided so that the surface thereof faces the occupant side along the axial direction of the rim portion 22 in a state where the decorative piece 90 is mounted on the exposed portion 88. A surface of the upper wall 92 facing the rim portion 22 is a fixing surface 94. An adhesive is applied to the fixing surface 94, and the upper wall 92 is fixed to the rim portion 22 by this adhesive.

  A side wall 96 is continuously formed from one end of the upper wall 92 in the width direction. The side wall 96 extends to the opposite side of the occupant along the axial direction of the rim portion 22 with respect to the upper wall 92, and is provided at a portion of the exposed portion 88 where the rim portion 22 is exposed radially inward. It is done. The surface of the side wall 96 facing the rim portion 22 is a fixing surface 98, and an adhesive is applied, and the side wall 96 is fixed to the rim portion 22 by this adhesive.

  A mounting groove 100 is formed on the fixing surfaces 94 and 98, and a reinforcing plate 102 as a reinforcing member is fitted therein. Unlike the reinforcing plate 42 in the first embodiment, the reinforcing plate 102 is composed of an upper wall 104 corresponding to the upper wall 92 and a side wall 106 corresponding to the side wall 96, and is added as a whole. It is formed in a substantially L-shaped cross section similar to the decorative piece 90.

  As shown in FIG. 10, the screw 44 penetrates the side wall 106 of the reinforcing plate 102 from the radially outer side of the rim portion 22 and is further screwed into the side wall 96 of the decorative piece 90. Thereby, the reinforcing plate 102 is fixed to the decorative piece 90.

  On the other hand, as shown in FIG. 9, a long hole 46 is formed in the upper wall 104 of the reinforcing plate 42, and a connecting piece 48 is attached to the upper wall 104 in the vicinity of the long hole 46 (however, In this embodiment, although the connecting piece 48 is provided, the connecting piece 56 is not provided).

  Corresponding to the base portion 52 and the retaining piece 54 of the connecting piece 48 provided on the upper wall 104, the rim portion 22 is formed with a hole portion 108 corresponding to the “hole” in the claims. . Unlike the through-hole 58 in the first embodiment, the hole portion 108 is a bottomed hole that is opened only on the surface of the rim portion 22. The hole portion 108 is filled with a synthetic resin material 68, and the base portion 52 and the retaining piece 54 are integrated with the cured synthetic resin material 68 in a state of being embedded in the synthetic resin material 68 as in the first embodiment. Connected.

<Operation and Effect of Second Embodiment>
In the steering wheel 80 configured as described above, the decorative piece 90 is provided not only on the occupant side along the axial direction of the rim portion 22 but also on the radially inner side of the rim portion 22. For this reason, the design is improved.

  Here, in the present embodiment, the synthetic resin material 68 is fixed to the inner peripheral portion and the bottom portion of the hole portion 108. For this reason, the base portion 52 and the retaining piece 54 of the connecting piece 48 embedded in the synthetic resin material 68 fixed to the inner peripheral portion and the bottom portion of the hole portion 108 do not come out of the hole portion 108. Thereby, the decorative piece 90 integrally fixed to the reinforcing plate 42 to which the connecting piece 48 is fixed is not separated from the exposed portion 88, and the decorative piece 90 is stably attached to the rim portion 22. .

  Also in the present embodiment, the reinforcing plate 102 having higher rigidity than the decorative piece 90 fitted into the mounting groove 100 of the decorative piece 90 formed of wood is integrally fixed to the decorative piece 90. . For this reason, even if deformation such as “warping” occurs in the decorative piece 90 with changes in the temperature and humidity in the vehicle compartment, the reinforcing plate 102 that is integrally fixed to the decorative piece 90 is provided with the decorative piece 90. The deformation of the is tightly regulated.

  Thereby, even if a change occurs in the temperature and humidity in the vehicle compartment as described above, the decoration piece 90 is not greatly deformed, and the quality can be maintained.

  Moreover, in this Embodiment, the cross-sectional shape of the decoration piece 90 is formed in the substantially L shape. In the case of such a cross-sectional shape, “warping” is less likely to be deformed than a simple flat plate shape. Therefore, the decoration piece 90 is not greatly deformed by this, and the quality can be maintained.

  Further, in the present embodiment, the cross-sectional shape of the reinforcing plate 102 is also substantially L-shaped. Therefore, the rigidity is higher than when the reinforcing plate 102 is formed in a simple flat plate shape. Therefore, the deformation of the decorative piece 90 to which the reinforcing plate 102 is fixed is more strongly restricted by the reinforcing plate 102. Even in this case, in the present embodiment, the decoration piece 90 is not greatly deformed, and the quality can be maintained.

  In the present embodiment, the side wall 96 of the decorative piece 90 is provided on the radially inner side of the rim portion 22, but the side wall 96 of the decorative piece 90 may be provided on the radially outer side of the rim portion 22. Alternatively, the decorative piece 90 may be provided with a pair of side walls 96 so as to face the rim portion 22 in the radial direction, and the side walls 96 may be disposed on both sides of the rim portion 22 along the radial direction.

  Further, in each of the above embodiments, the mounting portions on which the decorative pieces 32 and 90 of the wheel bodies 12 and 82 are mounted are the exposed portions 30 and 88 where the core bars 14 and 84 are exposed. However, the cored bars 14 and 84 are covered with the urethane part 26 (covering part 16) or the like in the mounting part where the decorative pieces 32 and 90 are mounted, and the cored bars 14 and 84 are covered without being exposed. It is good also as a structure which forms in the urethane part 26 (covering part 16) in a mounting part the through-hole which communicates with 58 and the hole part 108 and the securing piece 54 passes.

It is a disassembled perspective view which shows the structure of the principal part of the steering wheel which concerns on the 1st Embodiment of this invention. It is sectional drawing of the steering wheel in the part which provided the connection member. It is sectional drawing corresponding to FIG. 2 in the part which provided the connection member from which direction of a securing part differs. It is sectional drawing corresponding to FIG. 2 in the coupling | bond part of a decorating member and a reinforcement member. It is a perspective view of the back surface side of a decorating member. It is a disassembled perspective view by the side of the rim | limb part of the steering wheel which concerns on the 1st Embodiment of this invention. 1 is a plan view of a steering wheel according to a first embodiment of the present invention. It is a disassembled perspective view which shows the structure of the principal part of the steering wheel which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the steering wheel in the part which provided the connection member. It is sectional drawing corresponding to FIG. 9 in the coupling | bond part of a decorating member and a reinforcement member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Steering wheel 12 Wheel main body 14 Core metal 16 Covering part 30 Exposed part (mounting part)
32 decoration piece (decorative member)
34 1st decoration part 36 2nd decoration part 42 Reinforcement plate (reinforcement member)
48 connection piece (connection member)
54 Retaining piece (Retaining part)
56 Connection piece (connection member)
58 Through hole (hole)
80 Steering wheel 82 Wheel body 84 Core metal 88 Exposed part (mounting part)
90 decorating piece (decorating material)
102 Reinforcement plate (reinforcement member)
108 Hole (hole)

Claims (4)

A wheel main body having a mandrel that is mechanically coupled to a vehicle steering device and whose periphery is covered by a covering portion;
A decorative member that is provided in a predetermined mounting portion set in the wheel body and decorates the wheel body;
A reinforcing member that is integrally connected to the decorating member on the wheel body side of the decorating member and that is more rigid than the decorating member and restricts deformation of the decorating member;
A connecting member that is mechanically connected to the core metal in a state of being fixed to the reinforcing member;
Steering wheel with One end is formed on the cored bar corresponding to the mounting part, enters a hole opened on the surface of the decorative member provided in the mounting part, and is pressed into the hole by an elastic force In the connection member, a retaining portion for restricting the movement of the decorative member in the direction away from the wheel body is provided,
The steering wheel according to claim 1. A plurality of the holes are formed in the cored bar, a plurality of the connecting members are provided corresponding to each of the plurality of holes, and the inside of the holes of some of the retaining portions among the plurality of connecting members The pressure-contact direction with respect to the inside of the hole of the other retaining portion is different from the pressure-contact direction,
The steering wheel according to claim 2. A first decorative portion made of wood;
A second decorative portion formed of another wood having a different grain direction from the wood constituting the first decorative portion, and integrally fixed to the first decorative portion;
Constructed the decorative member including
The steering wheel according to any one of claims 1 to 3, wherein the steering wheel is provided.

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