JP6049199B2

JP6049199B2 - Steering wheel

Info

Publication number: JP6049199B2
Application number: JP2013104773A
Authority: JP
Inventors: 智史山川; 浩史櫻井
Original assignee: Suzuki Motor Co Ltd; Toyoda Gosei Co Ltd
Current assignee: Suzuki Motor Co Ltd; Toyoda Gosei Co Ltd
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2016-12-21
Anticipated expiration: 2033-05-17
Also published as: JP2014223883A

Description

本発明は、
運転者が把持する環状のリムと、
ステアリングシャフトが連結されるボスと、
前記リムとボスを連結するスポークとを備え、
前記リムは、前記リムの回転中心線方向一方側のアッパーリムと他方側のロアリムとから成り、
前記アッパーリムとロアリムは、樹脂により断面円弧状に成形されて互いに振動溶着されているステアリングホイールに関する。 The present invention
An annular rim gripped by the driver;
A boss to which the steering shaft is connected,
A spoke connecting the rim and the boss,
The rim is composed of an upper rim on one side in the rotation center line direction of the rim and a lower rim on the other side,
The upper rim and the lower rim relate to a steering wheel that is molded into a circular arc shape with resin and is welded to each other by vibration.

従来、上記のステアリングホイールでは、アッパーリムとロアリムを振動溶着する場合、ロアリムを固定し、このロアリムの端面にアッパーリムの端面を重ね合わせ、アッパーリムをロアリムに対し周方向（円周方向）に振動させてロアリムに振動溶着していた。（特許文献１の明細書の段落（００４３）参照） Conventionally, in the above-described steering wheel, when the upper rim and the lower rim are vibration welded, the lower rim is fixed, the end surface of the upper rim is overlapped with the end surface of the lower rim, and the upper rim is circumferentially (circumferential) with respect to the lower rim. It was vibrated and welded to the lower rim. (See paragraph (0043) of the specification of Patent Document 1)

特開２０１１−２０７４３３号公報JP 2011-207433 A

上記従来の構造によれば、振動溶着されたアッパーリムとロアリムから成るリムは中空状に形成され、リム内に、周方向に連続した長い空間（中空部）が形成されるために、リムの剛性・強度が十分ではなかった。
本発明の目的は、剛性・強度を十分向上させることができるステアリングホイールを提供する点にある。 According to the above conventional structure, the rim composed of the vibration-welded upper rim and lower rim is formed in a hollow shape, and a long space (hollow portion) continuous in the circumferential direction is formed in the rim. The rigidity and strength were not sufficient.
An object of the present invention is to provide a steering wheel capable of sufficiently improving rigidity and strength.

本発明の特徴は、
運転者が把持する環状のリムと、
ステアリングシャフトが連結されるボスと、
前記リムとボスを連結するスポークとを備え、
前記リムは、前記リムの回転中心線方向一方側のアッパーリムと他方側のロアリムとから成り、
前記アッパーリムとロアリムは、樹脂により断面円弧状に成形されて互いに振動溶着されているステアリングホイールであって、
前記アッパーリムの内面に、前記アッパーリムの中心に対して放射状に位置する複数の第１連結リブが立設され、
複数の前記第１連結リブと各別に交差し、それぞれが平行となる複数の直線状の第１追加リブが前記アッパーリムの内面に局所的に立設され、
前記ロアリムの内面に、前記ロアリムの中心に対して放射状に位置する複数の第２連結リブが立設され、
複数の前記第２連結リブと各別に交差し、それぞれが平行となる複数の直線状の第２追加リブが前記ロアリムの内面に局所的に立設され、
前記複数の第１連結リブの頂面と前記複数の第２連結リブの頂面とが各別に振動溶着され、
前記複数の第１追加リブの頂面と前記複数の第２追加リブの頂面とが各別に振動溶着されている点にある。（請求項１）。 The feature of the present invention is that
An annular rim gripped by the driver;
A boss to which the steering shaft is connected,
A spoke connecting the rim and the boss,
The rim is composed of an upper rim on one side in the rotation center line direction of the rim and a lower rim on the other side,
The upper rim and the lower rim are a steering wheel that is molded into a circular arc shape with a resin and is welded to each other by vibration,
On the inner surface of the upper rim, a plurality of first connecting ribs that are located radially with respect to the center of the upper rim are erected,
A plurality of linear first additional ribs that intersect with each of the plurality of first connecting ribs and are parallel to each other are locally erected on the inner surface of the upper rim,
On the inner surface of the lower rim, a plurality of second connecting ribs that are positioned radially with respect to the center of the lower rim are erected,
A plurality of linear second additional ribs that intersect with each of the plurality of second connecting ribs and are parallel to each other are locally erected on the inner surface of the lower rim,
The top surfaces of the plurality of first connection ribs and the top surfaces of the plurality of second connection ribs are vibration welded separately,
The top surfaces of the plurality of first additional ribs and the top surfaces of the plurality of second additional ribs are separately welded by vibration. (Claim 1).

上記の構成によれば、アッパーリムの内面に立設された前記複数の第１連結リブの頂面と、ロアリムの内面に立設された前記複数の第２連結リブの頂面とが各別に振動溶着されている。従って、第１連結リブと第２連結リブでリムを補強することができ、リムの剛性・強度を向上させることができる。
例えば、第１連結リブと第２連結リブが振動方向と直交する方向に沿っている構造では、第１連結リブの頂面と第２連結リブの頂面との振動方向の接触長さが短い。そのために、両頂面同士の摺動中に一方の頂面が他方の頂面からはみ出して両頂面同士の溶着が不良になる虞がある。
これに対して、本発明の構成によれば、前記第１追加リブの頂面と第２追加リブの頂面も振動溶着される。この第１追加リブの頂面と第２追加リブの頂面との振動方向の接触長さは長いから、両頂面同士の摺動中に一方の頂面が他方の頂面からはみ出す不具合を回避でき、両頂面の振動溶着が良好になる。
その結果、第１連結リブの頂面と第２連結リブの頂面との溶着が不良になっても、第１連結リブと第２連結リブの周りの剛性・強度の低下を、互いに振動溶着された第１追加リブと第２追加リブによって抑制することができる。
また、前記１又は２以上の第１追加リブは、所定の１又は２以上の前記第１連結リブに対してだけ設けられ、前記１又は２以上の第２追加リブは、所定の１又は２以上の前記第２連結リブに対してだけ設けられている。従って、第１追加リブと第２追加リブを設けたことによる重量増加を最小限に抑えることができる。つまり、最小限の重量増加でリムの剛性・強度を効果的に向上させることができる。（請求項１） According to the above configuration, the top surfaces of the plurality of first connection ribs erected on the inner surface of the upper rim and the top surfaces of the plurality of second connection ribs erected on the inner surface of the lower rim are separately provided. Vibration welded. Therefore, the rim can be reinforced by the first connecting rib and the second connecting rib, and the rigidity and strength of the rim can be improved.
For example, in a structure in which the first connecting rib and the second connecting rib are along a direction orthogonal to the vibration direction, the contact length in the vibration direction between the top surface of the first connecting rib and the top surface of the second connecting rib is short. . Therefore, there is a possibility that one top surface protrudes from the other top surface during sliding between the two top surfaces, resulting in poor welding between the two top surfaces.
On the other hand, according to the configuration of the present invention, the top surface of the first additional rib and the top surface of the second additional rib are also vibration welded. Since the contact length in the vibration direction between the top surface of the first additional rib and the top surface of the second additional rib is long, there is a problem that one top surface protrudes from the other top surface during sliding between both top surfaces. This can be avoided, and vibration welding on both top surfaces is improved.
As a result, even if the welding between the top surface of the first connecting rib and the top surface of the second connecting rib becomes poor, the rigidity and strength around the first connecting rib and the second connecting rib are reduced by vibration welding. It can suppress by the made 1st additional rib and 2nd additional rib.
The one or more first additional ribs are provided only for the predetermined one or two or more first connecting ribs, and the one or two or more second additional ribs are the predetermined one or two. It is provided only for the second connecting rib. Therefore, an increase in weight due to the provision of the first additional rib and the second additional rib can be minimized. That is, the rigidity and strength of the rim can be effectively improved with a minimum weight increase. (Claim 1)

本第２発明の特徴は、
運転者が把持する環状のリムと、
ステアリングシャフトが連結されるボスと、
前記リムとボスを連結するスポークとを備え、
前記リムは、前記リムの回転中心線方向一方側のアッパーリムと他方側のロアリムとから成り、
前記アッパーリムとロアリムは、樹脂により断面円弧状に成形されて互いに振動溶着されているステアリングホイールであって、
前記アッパーリムの内面に、前記アッパーリムの中心に対して放射状に位置する複数の第１連結リブが立設され、
所定の１又は２以上の前記第１連結リブと各別に交差する１又は２以上の第１追加リブが前記アッパーリムの内面に局所的に立設され、
前記ロアリムの内面に、前記ロアリムの中心に対して放射状に位置する複数の第２連結リブが立設され、
所定の１又は２以上の前記第２連結リブと各別に交差する１又は２以上の第２追加リブが前記ロアリムの内面に局所的に立設され、
前記第１連結リブと前記第２連結リブの一方に、リブ高さ寸法が高くなる凸部、他方にリブ高さ寸法が低くなる段差が形成され、
前記複数の第１連結リブの頂面と前記複数の第２連結リブの頂面とが各別に振動溶着され、
前記凸部の頂面と前記段差の段差面とが重ね合わされて振動溶着され、
前記１又は２以上の第１追加リブの頂面と前記１又は２以上の第２追加リブの頂面とが各別に振動溶着されている点にある。（請求項２）
上記の構成によれば、アッパーリムの内面に立設された前記複数の第１連結リブの頂面と、ロアリムの内面に立設された前記複数の第２連結リブの頂面とが各別に振動溶着されている。従って、第１連結リブと第２連結リブでリムを補強することができ、リムの剛性・強度を向上させることができる。
例えば、第１連結リブと第２連結リブが振動方向と直交する方向に沿っている構造では、第１連結リブの頂面と第２連結リブの頂面との振動方向の接触長さが短い。そのために、両頂面同士の摺動中に一方の頂面が他方の頂面からはみ出して両頂面同士の溶着が不良になる虞がある。
これに対して、本発明の構成によれば、前記第１追加リブの頂面と第２追加リブの頂面も振動溶着される。この第１追加リブの頂面と第２追加リブの頂面との振動方向の接触長さは長いから、両頂面同士の摺動中に一方の頂面が他方の頂面からはみ出す不具合を回避でき、両頂面の振動溶着が良好になる。
その結果、第１連結リブの頂面と第２連結リブの頂面との溶着が不良になっても、第１連結リブと第２連結リブの周りの剛性・強度の低下を、互いに振動溶着された第１追加リブと第２追加リブによって抑制することができる。
また、前記１又は２以上の第１追加リブは、所定の１又は２以上の前記第１連結リブに対してだけ設けられ、前記１又は２以上の第２追加リブは、所定の１又は２以上の前記第２連結リブに対してだけ設けられている。従って、第１追加リブと第２追加リブを設けたことによる重量増加を最小限に抑えることができる。つまり、最小限の重量増加でリムの剛性・強度を効果的に向上させることができる。（請求項２）
本発明において、
振動溶着時の前記アッパーリムとロアリムの振動方向、及び、前記第１追加リブの長手方向と前記第２追加リブの長手方向は前記アッパーリムとロアリムの左右方向に設定されていると、次の作用を奏することができる。（請求項３） The feature of the second invention is:
An annular rim gripped by the driver;
A boss to which the steering shaft is connected,
A spoke connecting the rim and the boss,
The rim is composed of an upper rim on one side in the rotation center line direction of the rim and a lower rim on the other side,
The upper rim and the lower rim are a steering wheel that is molded into a circular arc shape with a resin and is welded to each other by vibration,
On the inner surface of the upper rim, a plurality of first connecting ribs that are located radially with respect to the center of the upper rim are erected,
One or two or more first additional ribs that intersect with the predetermined one or more first connecting ribs are provided locally on the inner surface of the upper rim,
On the inner surface of the lower rim, a plurality of second connecting ribs that are positioned radially with respect to the center of the lower rim are erected,
One or two or more second additional ribs that intersect with each of the predetermined one or more second connecting ribs are locally provided on the inner surface of the lower rim,
One of the first connecting rib and the second connecting rib is formed with a convex portion that increases the height of the rib, and the other is formed with a step that decreases the height of the rib.
The top surfaces of the plurality of first connection ribs and the top surfaces of the plurality of second connection ribs are vibration welded separately,
The top surface of the convex portion and the step surface of the step are overlapped and vibration welded,
The top surface of the 1 or 2 or more 1st additional rib and the top surface of the 1 or 2 or more 2nd additional rib exist in the point by which vibration welding is carried out separately, respectively. (Claim 2)
According to the above configuration, the top surfaces of the plurality of first connection ribs erected on the inner surface of the upper rim and the top surfaces of the plurality of second connection ribs erected on the inner surface of the lower rim are separately provided. Vibration welded. Therefore, the rim can be reinforced by the first connecting rib and the second connecting rib, and the rigidity and strength of the rim can be improved.
For example, in a structure in which the first connecting rib and the second connecting rib are along a direction orthogonal to the vibration direction, the contact length in the vibration direction between the top surface of the first connecting rib and the top surface of the second connecting rib is short. . Therefore, there is a possibility that one top surface protrudes from the other top surface during sliding between the two top surfaces, resulting in poor welding between the two top surfaces.
On the other hand, according to the configuration of the present invention, the top surface of the first additional rib and the top surface of the second additional rib are also vibration welded. Since the contact length in the vibration direction between the top surface of the first additional rib and the top surface of the second additional rib is long, there is a problem that one top surface protrudes from the other top surface during sliding between both top surfaces. This can be avoided, and vibration welding on both top surfaces is improved.
As a result, even if the welding between the top surface of the first connecting rib and the top surface of the second connecting rib becomes poor, the rigidity and strength around the first connecting rib and the second connecting rib are reduced by vibration welding. It can suppress by the made 1st additional rib and 2nd additional rib.
The one or more first additional ribs are provided only for the predetermined one or two or more first connecting ribs, and the one or two or more second additional ribs are the predetermined one or two. It is provided only for the second connecting rib. Therefore, an increase in weight due to the provision of the first additional rib and the second additional rib can be minimized. That is, the rigidity and strength of the rim can be effectively improved with a minimum weight increase. (Claim 2)
In the present invention,
When the vibration direction of the upper rim and the lower rim at the time of vibration welding, and the longitudinal direction of the first additional rib and the longitudinal direction of the second additional rib are set in the left-right direction of the upper rim and the lower rim, There is an effect. (Claim 3 )

前記第１追加リブの頂面と第２追加リブの頂面の振動方向の接触長さをより確実に長くすることができ、両頂面同士の摺動中に一方の頂面が他方の頂面からはみ出す不具合を回避できて、両頂面の振動溶着をより良好にすることができる。（請求項３） The contact length in the vibration direction between the top surface of the first additional rib and the top surface of the second additional rib can be increased more reliably. The problem of protruding from the surface can be avoided, and vibration welding of both top surfaces can be made better. (Claim 3 )

本発明において、
前記振動方向の前記第１追加リブの長さと、前記振動方向の前記第２追加リブの長さとは、それぞれ前記リムの太さと略同一に設定されていると、次の作用を奏することができる。（請求項４） In the present invention,
If the length of the first additional rib in the vibration direction and the length of the second additional rib in the vibration direction are set to be substantially the same as the thickness of the rim, the following effects can be obtained. . (Claim 4 )

荷重負荷による曲げ方向の第１追加リブと第２追加リブの剛性・強度を確保することができる。（請求項４） The rigidity and strength of the first additional rib and the second additional rib in the bending direction due to the load can be ensured. (Claim 4 )

本発明において、
前記第１追加リブのリブ厚は前記アッパーリムの肉厚と略同一に設定され、
前記第２追加リブのリブ厚は前記ロアリムの肉厚と略同一に設定されていると、次の作用を奏することができる。（請求項５） In the present invention,
The rib thickness of the first additional rib is set to be substantially the same as the wall thickness of the upper rim,
If the rib thickness of the second additional rib is set to be substantially the same as the thickness of the lower rim, the following action can be achieved. (Claim 5 )

アッパーリムの成形時に、第１追加リブに対応する成形型のキャビティ内の樹脂材の流れやすさを、前記成形型の他のキャビティ内の樹脂材の流れやすさと同程度にすることができる。また、ロアリムの成形時に、第２追加リブに対応する成形型のキャビティ内の樹脂材の流れやすさを、前記成形型の他のキャビティ内の樹脂材の流れやすさと同程度にすることができる。従って、成形性を向上させることができる。（請求項５） At the time of molding the upper rim, the ease of flow of the resin material in the cavity of the mold corresponding to the first additional rib can be made comparable to the ease of flow of the resin material in the other cavity of the mold. Further, at the time of molding the lower rim, the ease of flow of the resin material in the cavity of the mold corresponding to the second additional rib can be made comparable to the ease of flow of the resin material in the other cavity of the mold. . Therefore, moldability can be improved. (Claim 5 )

本発明によれば、
強度を十分向上させることができるステアリングホイールを提供することができた。 According to the present invention,
The steering wheel which can fully improve intensity | strength was able to be provided.

アッパーリムとロアリムの分解状態と組み付け状態を示す斜視図Perspective view showing disassembled state and assembled state of upper rim and lower rim ステアリングホイールの斜視図Steering wheel perspective view アッパーリムとロアリムが組み付けられた状態を、リムの回転中心線方向で乗員側から見た図View of the upper rim and lower rim assembled as seen from the occupant side in the direction of the center of rotation of the rim アッパーリムを裏側（内側）から見た図View of the upper rim from the back (inside) スポークのフレームに連結されたロアリムを裏側（内側）から見た図View of the lower rim connected to the spoke frame from the back (inside) アッパーリムの上端部を裏側（内側）から見た図View of the upper edge of the upper rim from the back (inside) ロアリムの上端部を裏側（内側）から見た図View of the upper end of the lower rim from the back (inside) （ａ）は図６のＡ−Ａ断面図、（ｂ）は図７のＢ−Ｂ断面図(A) is AA sectional drawing of FIG. 6, (b) is BB sectional drawing of FIG. アッパーリムの上端部の第１連連結リブと第１追加リブを示す斜視図The perspective view which shows the 1st continuous connection rib and 1st additional rib of the upper end part of an upper rim | limb. ロアリムの上端部の第２連連結リブと第２追加リブを示す斜視図The perspective view which shows the 2nd continuous connection rib and 2nd additional rib of the upper end part of a lower rim.

以下、本発明を実施するための形態を図面に基づいて説明する。
図２に自動車のステアリングホイール１を示してある。このステアリングホイール１は、運転者が把持する円形環状のリム２と、ステアリングシャフトの上端部が連結されるボス３と、リム２とボス３を連結するスポーク４とを備えている。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 2 shows a steering wheel 1 of an automobile. The steering wheel 1 includes a circular annular rim 2 held by a driver, a boss 3 to which an upper end portion of a steering shaft is connected, and a spoke 4 to connect the rim 2 and the boss 3.

前記スポーク４は、左側スポーク部４１と右側スポーク部４２と下側スポーク部４３とから成る。左側スポーク部４１は、リム２の左側の端部２Ａとボス３を連結する。また、右側スポーク部４２はリム２の右側の端部２Ｂとボス３を連結する。そして、下側スポーク部４３は、リム２の下端部２Ｄとボス３を連結する。図２の符号２Ｃはリム２の上端部を示している。 The spoke 4 includes a left spoke portion 41, a right spoke portion 42, and a lower spoke portion 43. The left spoke portion 41 connects the left end portion 2 A of the rim 2 and the boss 3. Further, the right spoke portion 42 connects the right end portion 2 B of the rim 2 and the boss 3. The lower spoke part 43 connects the lower end 2D of the rim 2 and the boss 3. 2 indicates the upper end of the rim 2.

左側スポーク部４１と右側スポーク部４２と下側スポーク部４３とボス３は、それぞれ金属製のフレーム４１Ｆ，４２Ｆ，４３Ｆ，３Ｆ（図１，図３参照）を備えている。そして、左側スポーク部４１のフレーム４１Ｆと右側スポーク部４２のフレーム４２Ｆと下側スポーク部４３のフレーム４３Ｆがボス３のフレーム３Ｆに連結されている。各フレーム４１Ｆ，４２Ｆ，４３Ｆ，３Ｆは樹脂製のカバー６（図２参照）で覆われている。ステアリングシャフトの上端部は、ボス３のフレーム３Ｆに設けられた連結部３Ｂ（図１，図３参照）に連結される。 The left spoke portion 41, the right spoke portion 42, the lower spoke portion 43, and the boss 3 include metal frames 41F, 42F, 43F, and 3F (see FIGS. 1 and 3), respectively. The frame 41F of the left spoke portion 41, the frame 42F of the right spoke portion 42, and the frame 43F of the lower spoke portion 43 are connected to the frame 3F of the boss 3. Each frame 41F, 42F, 43F, 3F is covered with a resin cover 6 (see FIG. 2). The upper end portion of the steering shaft is connected to a connecting portion 3B (see FIGS. 1 and 3) provided on the frame 3F of the boss 3.

［リム２の構造］
図１，図４，図５に示すように、前記リム２は、リム２の回転中心線方向一方側（乗員側）のアッパーリム２１と他方側（乗員とは反対側）のロアリム２２とから成る。アッパーリム２１とロアリム２２は、樹脂により断面円弧状に成形されて互いに振動溶着されている。振動溶着時のアッパーリム２１とロアリム２２の振動方向は、アッパーリム２１とロアリム２２の左右方向Ｗ（径方向に相当）に設定されている。 [Structure of rim 2]
As shown in FIGS. 1, 4, and 5, the rim 2 includes an upper rim 21 on one side (occupant side) of the rim 2 in the rotation center line direction and a lower rim 22 on the other side (opposite side of the occupant). Become. The upper rim 21 and the lower rim 22 are molded into a circular arc shape with resin and are welded to each other by vibration. The vibration direction of the upper rim 21 and the lower rim 22 during vibration welding is set to the left-right direction W (corresponding to the radial direction) of the upper rim 21 and the lower rim 22.

［アッパーリム２１の構造］
図４に示すように、アッパーリム本体２１Ｈの内面の底部幅方向中央に、アッパーリム本体２１Ｈの全周にわたる円形環状の第１中間壁２５が立設されている。そして、アッパーリム本体２１Ｈの中心Ｏ１（アッパーリムの中心に相当）に対して放射状に位置する複数の第１連結リブ２３が、アッパーリム本体２１Ｈの内面に立設されている。 [Structure of upper rim 21]
As shown in FIG. 4, a circular annular first intermediate wall 25 is provided over the entire circumference of the upper rim body 21H at the center in the bottom width direction of the inner surface of the upper rim body 21H. A plurality of first connecting ribs 23 radiating from the center O1 (corresponding to the center of the upper rim) of the upper rim main body 21H are erected on the inner surface of the upper rim main body 21H.

前記複数の第１連結リブ２３はアッパーリム本体２１Ｈの周方向に均等な角度ごとに分散配置されている。図９に示すように、アッパーリム本体２１Ｈの端面２１Ｈ１（ロアリム本体２２Ｈ（図５参照）に重ね合わされる端面）と、第１中間壁２５の頂面２５Ｔと、前記複数の第１連結リブ２３の頂面２３Ｔとは、アッパーリム本体２１Ｈの深さ方向で略同一位置に位置する。 The plurality of first connecting ribs 23 are distributed at equal angles in the circumferential direction of the upper rim body 21H. As shown in FIG. 9, the end surface 21H1 of the upper rim body 21H (the end surface superimposed on the lower rim body 22H (see FIG. 5)), the top surface 25T of the first intermediate wall 25, and the plurality of first connecting ribs 23 The top surface 23T is located at substantially the same position in the depth direction of the upper rim body 21H.

さらに、図４，図６，図９に示すように、前記振動方向（アッパーリム２１の左右方向Ｗ）に沿い、アッパーリム２１の上端部２１Ｃ側の複数の第１連結リブ２３と各別に交差する複数の第１追加リブ２７がアッパーリム本体２１Ｈの内面に局所的に立設されている。第１追加リブ２７は前記第１中間壁２５とも交差している。 Further, as shown in FIGS. 4, 6, and 9, each of the plurality of first connecting ribs 23 on the upper end 21 C side of the upper rim 21 intersects with each other along the vibration direction (the left-right direction W of the upper rim 21). A plurality of first additional ribs 27 are locally erected on the inner surface of the upper rim body 21H. The first additional rib 27 also intersects with the first intermediate wall 25.

［ロアリム２２の構造］
図５に示すように、ロアリム本体２２Ｈの内面の底部幅方向中央に、ロアリム本体２２Ｈの全周にわたる円形環状の第２中間壁２６が立設されている。そして、ロアリム本体２２Ｈの中心０２（ロアリムの中心に相当）に対して放射状に位置する複数の第２連結リブ２４がロアリム本体２２Ｈの内面に立設されている。 [Structure of lower rim 22]
As shown in FIG. 5, a circular annular second intermediate wall 26 is provided over the entire circumference of the lower rim main body 22H at the center in the bottom width direction of the inner surface of the lower rim main body 22H. A plurality of second connecting ribs 24 radiating from the center 02 (corresponding to the center of the lower rim) of the lower rim main body 22H are erected on the inner surface of the lower rim main body 22H.

前記複数の第２連結リブ２４はロアリム本体２２Ｈの周方向に均等な角度ごとに分散配置されている。図１０に示すように、ロアリム本体２２Ｈの端面２２Ｈ１（アッパーリム本体２１Ｈ（図４参照）に重ね合わされる端面）と、第２中間壁２６の頂面２６Ｔと、前記複数の第２連結リブ２４の頂面２４Ｔとは、ロアリム本体２２Ｈの深さ方向で略同一位置に位置する（図１，図１０参照）。 The plurality of second connecting ribs 24 are distributed at equal angles in the circumferential direction of the lower rim body 22H. As shown in FIG. 10, the end surface 22H1 of the lower rim main body 22H (the end surface superimposed on the upper rim main body 21H (see FIG. 4)), the top surface 26T of the second intermediate wall 26, and the plurality of second connecting ribs 24. The top surface 24T is located at substantially the same position in the depth direction of the lower rim body 22H (see FIGS. 1 and 10).

さらに、図５，図７,図１０に示すように、前記振動方向（ロアリム２２の左右方向Ｗ）に沿い、ロアリム２２の上端部２２Ｃ側の複数の第２連結リブ２４と各別に交差する複数の第２追加リブ２８がロアリム本体２２Ｈの内面に局所的に立設されている。第２追加リブ２８は前記第２中間壁２６とも交差している。 Furthermore, as shown in FIGS. 5, 7, and 10, a plurality of crossings that individually intersect with the plurality of second connecting ribs 24 on the upper end 22 C side of the lower rim 22 along the vibration direction (the left-right direction W of the lower rim 22). The second additional rib 28 is locally erected on the inner surface of the lower rim body 22H. The second additional rib 28 also intersects with the second intermediate wall 26.

上記のように、振動溶着時のアッパーリム２１とロアリム２２の振動方向、及び、第１追加リブ２７の長手方向と第２追加リブ２８の長手方向はアッパーリム２１とロアリム２２の左右方向に設定されている。 As described above, the vibration direction of the upper rim 21 and the lower rim 22 during vibration welding, and the longitudinal direction of the first additional rib 27 and the longitudinal direction of the second additional rib 28 are set in the left-right direction of the upper rim 21 and the lower rim 22. Has been.

前記振動方向の前記第１追加リブ２７の長さと、前記振動方向の前記第２追加リブ２８の長さとは、前記リム２の太さと略同一に設定されている。 The length of the first additional rib 27 in the vibration direction and the length of the second additional rib 28 in the vibration direction are set to be substantially the same as the thickness of the rim 2.

また、図６に示すように、前記第１追加リブ２７のリブ厚はアッパーリム２１の肉厚と略同一に設定され、図７に示すように、第２追加リブ２８のリブ厚はロアリム２２の肉厚と略同一に設定されている。アッパーリム２１の肉厚とロアリム２２の肉厚は同一である。従って、第１追加リブ２７のリブ厚と第２追加リブ２８のリブ厚は同一である。 As shown in FIG. 6, the rib thickness of the first additional rib 27 is set to be substantially the same as the thickness of the upper rim 21, and the rib thickness of the second additional rib 28 is set to the lower rim 22 as shown in FIG. It is set to be approximately the same as the wall thickness. The wall thickness of the upper rim 21 and the wall thickness of the lower rim 22 are the same. Accordingly, the rib thickness of the first additional rib 27 and the rib thickness of the second additional rib 28 are the same.

そして、前記複数の第１連結リブ２３の頂面２３Ｔ（図８（ａ），図９参照）と複数の第２連結リブ２４の頂面２４Ｔ（図８（ｂ），図１０参照）とが各別に振動溶着され、前記複数の第１追加リブ２７の頂面２７Ｔ（図９参照）と前記複数の第２追加リブ２８の頂面２８Ｔ（図１０参照）とが各別に振動溶着されている。 The top surfaces 23T of the plurality of first connecting ribs 23 (see FIGS. 8A and 9) and the top surfaces 24T of the plurality of second connecting ribs 24 (see FIGS. 8B and 10) are formed. Vibration welding is performed separately, and top surfaces 27T (see FIG. 9) of the plurality of first additional ribs 27 and top surfaces 28T (see FIG. 10) of the plurality of second additional ribs 28 are vibration-welded separately. .

図８（ａ），図９に示すように、アッパーリム２１の中心側の第１連結リブ２３の端部には、第１連結リブ２３の高さ寸法が高くなる断面長方形状の凸部２３Ｄ（ロアリム２２側に突出する凸部）が形成されている。 As shown in FIGS. 8A and 9, a convex portion 23 D having a rectangular cross section at which the height dimension of the first connecting rib 23 is increased at the end of the first connecting rib 23 on the center side of the upper rim 21. (Protrusions projecting to the lower rim 22 side) are formed.

また、図８（ｂ），図１０に示すように、ロアリム２２の中心側の第２連結リブ２４の端部には、第２連結リブ２４の高さ寸法が低くなる段差２４Ｄ（アッパーリム２１とは反対側に凹む段差部）が形成されている。そして、前記凸部２３Ｄの頂面と段差２４Ｄの段差面とが重ね合わされて振動溶着されている。 Further, as shown in FIGS. 8B and 10, a step 24 D (upper rim 21) in which the height dimension of the second connecting rib 24 is lowered is formed at the end of the second connecting rib 24 on the center side of the lower rim 22. Is formed on the side opposite to the step). The top surface of the convex portion 23D and the step surface of the step 24D are overlapped and vibration welded.

上記のように、前記凸部２３Ｄの頂面と段差２４Ｄの段差面とが重ね合わされて振動溶着されるのは次の理由による。
すなわち、アッパーリム２１とロアリム２２とに分割されるリム２の分割点は、リム２の断面において径方向最も外側に位置する。そして、リム２の外周側の分割点と内周側の分割点とは高さ方向の位置が異なっている。また、第１連結リブ２３の頂面２３Ｔと第２連結リブ２４の頂面２４Ｔは、リム２の分割面に平行に設定される。そして、両頂面２３Ｔ，２４Ｔには溶着溶け代が設けられる。
そのために、上記のように、第１連結リブ２３の端部に凸部２３Ｄが形成されるとともに、第２連結リブ２４の端部に段差２４Ｄが形成されて、前記凸部２３Ｄの頂面と段差２４Ｄの段差面とが重ね合わされて振動溶着されている。 As described above, the top surface of the protrusion 23D and the step surface of the step 24D are overlapped and vibration welded for the following reason.
That is, the dividing point of the rim 2 that is divided into the upper rim 21 and the lower rim 22 is located on the outermost side in the radial direction in the cross section of the rim 2. And the position of the height direction differs between the dividing point on the outer peripheral side of the rim 2 and the dividing point on the inner peripheral side. Further, the top surface 23T of the first connecting rib 23 and the top surface 24T of the second connecting rib 24 are set parallel to the dividing surface of the rim 2. And both the top surfaces 23T and 24T are provided with the welding allowance.
Therefore, as described above, the convex portion 23D is formed at the end portion of the first connecting rib 23, and the step 24D is formed at the end portion of the second connecting rib 24, so that the top surface of the convex portion 23D is The step surface of the step 24D is superimposed and vibration welded.

本発明の構成によれば、前記複数の第１連結リブ２３の頂面２３Ｔと前記複数の第２連結リブ２４の頂面２４Ｔとが各別に振動溶着されているから、第１連結リブ２３と第２連結リブ２４でリム２を補強することができ、リム２の剛性・強度を向上させることができる。 According to the configuration of the present invention, the top surfaces 23T of the plurality of first connection ribs 23 and the top surfaces 24T of the plurality of second connection ribs 24 are separately welded by vibration. The rim 2 can be reinforced by the second connecting rib 24, and the rigidity and strength of the rim 2 can be improved.

第１連結リブ２３と第２連結リブ２４が振動方向と直交する方向に沿っている構造では、第１連結リブ２３の頂面２３Ｔと第２連結リブ２４の頂面２４Ｔとの振動方向の接触長さが短い。そのために、両頂面２３Ｔ，２４Ｔ同士の摺動中に一方の頂面２３Ｔ（又は２４Ｔ）が他方の頂面２４Ｔ（又は２３Ｔ）からはみ出して両頂面同士２３Ｔ，２４Ｔの溶着が不良になる虞がある。
これに対して、本発明の構成によれば、前記第１追加リブ２７の頂面２７Ｔと第２追加リブ２８の頂面２８Ｔも振動溶着される。この第１追加リブ２７の頂面２７Ｔと第２追加リブ２８の頂面２８Ｔの振動方向の接触長さは長いから、両頂面２７Ｔ，２８Ｔ同士の摺動中に一方の頂面２７Ｔ（又は２８Ｔ）が他方の頂面２８Ｔ（又は２７Ｔ）からはみ出す不具合を回避でき、両頂面２７Ｔ，２８Ｔの振動溶着が良好になる。 In the structure in which the first connecting rib 23 and the second connecting rib 24 are along the direction orthogonal to the vibration direction, the contact in the vibration direction between the top surface 23T of the first connection rib 23 and the top surface 24T of the second connection rib 24 is performed. The length is short. Therefore, one top surface 23T (or 24T) protrudes from the other top surface 24T (or 23T) during sliding of both top surfaces 23T and 24T, and the welding of both top surfaces 23T and 24T becomes poor. There is a fear.
On the other hand, according to the configuration of the present invention, the top surface 27T of the first additional rib 27 and the top surface 28T of the second additional rib 28 are also vibration welded. Since the contact length of the top surface 27T of the first additional rib 27 and the top surface 28T of the second additional rib 28 in the vibration direction is long, one of the top surfaces 27T (or the two top surfaces 27T and 28T during sliding) 28T) can be avoided from protruding from the other top surface 28T (or 27T), and vibration welding of both top surfaces 27T and 28T is improved.

その結果、第１連結リブ２３の頂面２３Ｔと第２連結リブ２４の頂面２４Ｔとの溶着が不良になっても、第１連結リブ２３と第２連結リブ２４の周りの剛性・強度の低下を、互いに振動溶着された第１追加リブ２７と第２追加リブ２８によって抑制することができる。
また、前記第１追加リブ２７は、アッパーリム２１の上端部２１Ｃ側の複数の第１連結リブ２３に対してだけ設けられ、前記第２追加リブ２８は、ロアリム２２の上端部２２Ｃ側の第２連結リブ２４に対してだけ設けられているから、第１追加リブ２７と第２追加リブ２８を設けたことによる重量増加を最小限に抑えることができる。つまり、最小限の重量増加でリム２の剛性・強度を効果的に向上させることができる。 As a result, even if the welding between the top surface 23T of the first connecting rib 23 and the top surface 24T of the second connecting rib 24 becomes poor, the rigidity and strength around the first connecting rib 23 and the second connecting rib 24 are reduced. The decrease can be suppressed by the first additional rib 27 and the second additional rib 28 that are vibration welded to each other.
The first additional rib 27 is provided only for the plurality of first connecting ribs 23 on the upper end portion 21C side of the upper rim 21, and the second additional rib 28 is the first additional rib 27 on the upper end portion 22C side of the lower rim 22. Since it is provided only for the two connecting ribs 24, an increase in weight due to the provision of the first additional rib 27 and the second additional rib 28 can be minimized. That is, the rigidity and strength of the rim 2 can be effectively improved with a minimum weight increase.

アッパーリム２１の下端部２１Ｄ（図４参照）に位置する第１連結リブ２３や、ロアリム２２の下端部２２Ｄ（図５参照）に位置する第２連結リブ２４は、振動方向と直交する方向に沿っていることから、振動溶着の不良が考えられる。しかしながら、アッパーリム２１の下端部２１Ｄやロアリム２２の下端部２２Ｄは下側スポーク部４３に補強されている。従って、前記アッパーリム２１の下端部２１Ｄ側の第１連結リブ２３の周りや、前記ロアリム２２の下端部２２Ｄ側の第２連結リブ２４の周りのリム２の剛性・強度が低下することはない。 The first connecting rib 23 located at the lower end 21D (see FIG. 4) of the upper rim 21 and the second connecting rib 24 located at the lower end 22D (see FIG. 5) of the lower rim 22 are in a direction perpendicular to the vibration direction. Therefore, the vibration welding may be defective. However, the lower end portion 21 D of the upper rim 21 and the lower end portion 22 D of the lower rim 22 are reinforced by the lower spoke portion 43. Therefore, the rigidity and strength of the rim 2 around the first connecting rib 23 on the lower end portion 21D side of the upper rim 21 and around the second connecting rib 24 on the lower end portion 22D side of the lower rim 22 are not lowered. .

前記振動方向の前記第１追加リブ２７の長さと、前記振動方向の前記第２追加リブ２８の長さとは、それぞれ前記リム２の太さと略同一に設定されているから、荷重負荷による曲げ方向の第１追加リブ２７と第２追加リブ２８の剛性・強度を確保することができる。 Since the length of the first additional rib 27 in the vibration direction and the length of the second additional rib 28 in the vibration direction are set to be substantially the same as the thickness of the rim 2, the bending direction due to a load is applied. The rigidity and strength of the first additional rib 27 and the second additional rib 28 can be ensured.

そして、前記第１追加リブ２７のリブ厚はアッパーリム２１の肉厚と略同一に設定されているから、アッパーリム２１の成形時に、第１追加リブ２７に対応する成形型のキャビティ内の樹脂材の流れやすさを、前記成形型の他のキャビティ内の樹脂材の流れやすさと同程度にすることができる。 Since the rib thickness of the first additional rib 27 is set to be substantially the same as the thickness of the upper rim 21, the resin in the cavity of the mold corresponding to the first additional rib 27 is formed when the upper rim 21 is molded. The ease of flow of the material can be made comparable to the ease of flow of the resin material in the other cavity of the mold.

また、第２追加リブ２８のリブ厚はロアリム２２の肉厚と略同一に設定されているから、ロアリム２２の成形時に、第２追加リブ２８に対応する成形型のキャビティ内の樹脂材の流れやすさを、前記成形型の他のキャビティ内の樹脂材の流れやすさと同程度にすることができる。これにより、成形性を向上させることができる。 Further, since the rib thickness of the second additional rib 28 is set to be substantially the same as the thickness of the lower rim 22, the flow of the resin material in the cavity of the molding die corresponding to the second additional rib 28 when the lower rim 22 is molded. The ease can be made comparable to the ease of flow of the resin material in the other cavity of the mold. Thereby, a moldability can be improved.

［別実施形態］
（１）前記第１追加リブ２７と、前記第１追加リブ２７が交差する第１連結リブ２３とはそれぞれ１個であってもよい。 [Another embodiment]
(1) The number of the first additional ribs 27 and the number of the first connecting ribs 23 that intersect with the first additional ribs 27 may be one.

（２）前記第２追加リブ２８と、前記第２追加リブ２８が交差する第２連結リブ２４とはそれぞれ１個であってもよい。 (2) The number of the second additional ribs 28 and the number of the second connecting ribs 24 at which the second additional ribs 28 intersect each other may be one.

（３）前記振動方向はアッパーリム２１とロアリム２２の左右方向Ｗに限られず、左右方向以外の方向であってもよい。
（４）前記第１追加リブ２７と第２追加リブ２８は円弧状に形成されていてもよい。
（５）上記第１の実施形態の構造に換え、あるいは、上記第１の実施形態の構造に加えて、次のように構成してあってもよい。
前記アッパーリム２１の下端部２１Ｄ側の複数の第１連結リブ２３と各別に交差する複数の第１追加リブがアッパーリム本体２１Ｈの内面に局所的に立設される。さらに、ロアリム２２の下端部２２Ｄ側の複数の第２連結リブ２４と各別に交差する複数の第２追加リブがロアリム本体２２Ｈの内面に局所的に立設される。そして、前記複数の第１追加リブの頂面と前記複数の第２追加リブの頂面とが各別に振動溶着される。 (3) The vibration direction is not limited to the left-right direction W of the upper rim 21 and the lower rim 22, and may be a direction other than the left-right direction.
(4) The first additional rib 27 and the second additional rib 28 may be formed in an arc shape.
(5) Instead of the structure of the first embodiment, or in addition to the structure of the first embodiment, the following structure may be adopted.
A plurality of first additional ribs that intersect with the plurality of first connecting ribs 23 on the lower end 21D side of the upper rim 21 are locally erected on the inner surface of the upper rim body 21H. Further, a plurality of second additional ribs that intersect with the plurality of second connecting ribs 24 on the lower end portion 22D side of the lower rim 22 are locally erected on the inner surface of the lower rim body 22H. The top surfaces of the plurality of first additional ribs and the top surfaces of the plurality of second additional ribs are vibration welded separately.

２リム
２Ａリムの左側の端部
２Ｂリムの右側の端部
２Ｄリムの下端部
３ボス
４スポーク
２１アッパーリム
２１Ｃアッパーリムの上端部
２２ロアリム
２２Ｃロアリムの上端部
２３第１連結リブ
２３Ｔ第１連結リブの頂面
２４第２連結リブ
２４Ｔ第２連結リブの頂面
２７第１追加リブ
２７Ｔ第１追加リブの頂面
２８第２追加リブ
２８Ｔ第２追加リブの頂面
４１左側スポーク部
４２右側スポーク部
４３下側スポーク部
Ｏ１アッパーリムの中心（アッパーリム本体の中心）
Ｏ２ロアリムの中心（ロアリム本体の中心）
Ｗ振動方向（アッパーリムとロアリムの左右方向） 2 Rim 2A Rim Left End 2B Rim Right End 2D Rim Lower End 3 Boss 4 Spoke 21 Upper Rim 21C Upper Rim Upper 22 Lower Rim 22C Lower Rim Upper 23 First Connection Rib 23T First Connection The top surface 24 of the rib The second connecting rib 24T The top surface 27 of the second connecting rib 27 The first additional rib 27T The top surface 28 of the first additional rib The second additional rib 28T The top surface 41 of the second additional rib 41 The left spoke part 42 The right spoke Part 43 Lower spoke part O1 Center of the upper rim (center of the upper rim body)
O2 Center of lower rim (center of lower rim body)
W Vibration direction (left and right direction of upper rim and lower rim)

Claims

An annular rim gripped by the driver;
A boss to which the steering shaft is connected,
A spoke connecting the rim and the boss,
The rim is composed of an upper rim on one side in the rotation center line direction of the rim and a lower rim on the other side,
The upper rim and the lower rim are a steering wheel that is molded into a circular arc shape with a resin and is welded to each other by vibration,
On the inner surface of the upper rim, a plurality of first connecting ribs that are located radially with respect to the center of the upper rim are erected,
A plurality of linear first additional ribs that intersect with each of the plurality of first connecting ribs and are parallel to each other are locally erected on the inner surface of the upper rim,
On the inner surface of the lower rim, a plurality of second connecting ribs that are positioned radially with respect to the center of the lower rim are erected,
A plurality of linear second additional ribs that intersect with each of the plurality of second connecting ribs and are parallel to each other are locally erected on the inner surface of the lower rim,
The top surfaces of the plurality of first connection ribs and the top surfaces of the plurality of second connection ribs are vibration welded separately,
A steering wheel in which top surfaces of the plurality of first additional ribs and top surfaces of the plurality of second additional ribs are separately welded by vibration.

  An annular rim gripped by the driver;
  A boss to which the steering shaft is connected,
  A spoke connecting the rim and the boss,
  The rim is composed of an upper rim on one side in the rotation center line direction of the rim and a lower rim on the other side,
  The upper rim and the lower rim are a steering wheel that is molded into a circular arc shape with a resin and is welded to each other by vibration,
  On the inner surface of the upper rim, a plurality of first connecting ribs that are located radially with respect to the center of the upper rim are erected,
  One or two or more first additional ribs that intersect with the predetermined one or more first connecting ribs are provided locally on the inner surface of the upper rim,
  On the inner surface of the lower rim, a plurality of second connecting ribs that are positioned radially with respect to the center of the lower rim are erected,
  One or two or more second additional ribs that intersect with each of the predetermined one or more second connecting ribs are locally provided on the inner surface of the lower rim,
  One of the first connecting rib and the second connecting rib is formed with a convex portion that increases the height of the rib, and the other is formed with a step that decreases the height of the rib.
  The top surfaces of the plurality of first connection ribs and the top surfaces of the plurality of second connection ribs are vibration welded separately,
  The top surface of the convex portion and the step surface of the step are overlapped and vibration welded,
  A steering wheel in which the top surface of the one or more first additional ribs and the top surface of the one or more second additional ribs are separately welded by vibration.

The vibration direction of the upper rim and Roarimu during vibration welding, and the longitudinal direction of the longitudinal direction of the first additional rib and the second additional rib claim 1 is set in the lateral direction of the upper rim and Roarimu or 2 Steering wheel.

The length of the first additional ribs of the vibration direction, the the length of the second additional rib, claim 1-3 to be set for substantially the same as the thickness of the rim of the vibration direction Steering wheel as described in

The rib thickness of the first additional rib is set to be substantially the same as the wall thickness of the upper rim,
The steering wheel according to any one of claims 1 to 4 , wherein a rib thickness of the second additional rib is set to be substantially the same as a thickness of the lower rim.