JP4608427B2 - Tightening bolt assembly structure of steering column with tilt mechanism - Google Patents

Tightening bolt assembly structure of steering column with tilt mechanism Download PDF

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JP4608427B2
JP4608427B2 JP2005374972A JP2005374972A JP4608427B2 JP 4608427 B2 JP4608427 B2 JP 4608427B2 JP 2005374972 A JP2005374972 A JP 2005374972A JP 2005374972 A JP2005374972 A JP 2005374972A JP 4608427 B2 JP4608427 B2 JP 4608427B2
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nut
tightening bolt
rotation
assembly structure
rotation restricting
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JP2007176247A (en
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浩典 市成
佳孝 野田
俊一 大月
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Hiruta Kogyo Co Ltd
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本発明は、チルト機構を有するステアリングコラムの締付ボルト組付構造に関する。   The present invention relates to a tightening bolt assembly structure for a steering column having a tilt mechanism.

近年のステアリングコラムは、車体側ブラケット及びコラム側ブラケットに締付ボルトを挿通し、この締付ボルトにチルトレバーを取り付けて構成される締付ボルト組付構造を採用し、前記チルトレバーの回転操作によるチルト機構を実現している。この締付ボルト組付構造は、チルトレバーを回転操作して、締付ボルトに装着した締付部材を軸方向に移動させたり、締付ボルトに対するチルトレバー又はナットの締付量を増減させることにより、車体側ブラケットをコラム側ブラケットに締め付けたり、弛めたりする。締付部材を用いる場合、締付ボルト組付構造が複雑になるほか、組付けに手間が掛かることから、締付ボルトに対するチルトレバー又はナットの締付量を増減させる締付ボルト組付構造が簡易であり、好ましい(特許文献1〜特許文献4)。   A recent steering column employs a tightening bolt assembly structure in which a tightening bolt is inserted into a vehicle body side bracket and a column side bracket, and a tilt lever is attached to the tightening bolt. The tilt mechanism is realized. This tightening bolt assembly structure rotates the tilt lever to move the tightening member attached to the tightening bolt in the axial direction, or increase or decrease the tightening amount of the tilt lever or nut with respect to the tightening bolt. As a result, the vehicle body side bracket is tightened or loosened to the column side bracket. When using a tightening member, the tightening bolt assembly structure becomes complicated and it takes time to assemble, so there is a tightening bolt assembly structure that increases or decreases the amount of tightening of the tilt lever or nut to the tightening bolt. It is simple and preferable (Patent Documents 1 to 4).

特許文献1は、ブラケットの長孔に係合する左右一対の舌片部をナットの直径方向の周縁部に相対向して形成した回り止め部材(プッシュナット)を用いる締付ボルト組付構造を開示している。前記回り止め部材の舌片部は、アジャストストッパの突起部の外側面を覆って、長孔の上端部と当接できる形状にすることで、締付ボルトの回転を規制し、回転操作されたチルトレバーを前記締付ボルトに締め付けたり、弛めたりする(引用文献1[0015]、図3〜図5参照)。   Patent Document 1 discloses a tightening bolt assembly structure that uses a detent member (push nut) in which a pair of left and right tongue pieces that engage with a long hole of a bracket are opposed to the peripheral edge in the diameter direction of a nut. Disclosure. The tongue piece of the anti-rotation member covers the outer surface of the protrusion of the adjustment stopper and has a shape that can come into contact with the upper end of the elongated hole, thereby restricting the rotation of the tightening bolt and rotating. The tilt lever is tightened or loosened on the tightening bolt (see cited document 1 [0015], FIGS. 3 to 5).

特許文献2は、締付ボルトの頭部外周面に形成したセレーションに係合するセレーションを内周面に形成した弾性体又は可撓性体からなる環状体で、直径方向で相対向して締付力を生じさせる上下一対の耳部を有する回り止め部材を用いる締付ボルト組付構造を開示している。この回り止め部材は、締付ボルトの頭部に形成した段部に係合して抜け止めされており、長孔に係合していない。また、この回り止め部材にはコラムブラケット(ディスタンスブラケット)のアームに延びる突起部が形成され、突起部の端部はカギ形に曲げ形成されてアームの端部に形成した孔に挿入されている(引用文献2[0012]、図2及び図3参照)。   Patent Document 2 is an annular body made of an elastic body or a flexible body having serrations formed on the inner peripheral surface thereof that engage with serrations formed on the outer peripheral surface of the head of the tightening bolt. A tightening bolt assembling structure using a detent member having a pair of upper and lower ears for generating an attaching force is disclosed. The detent member is engaged with a step formed on the head of the tightening bolt and is prevented from coming off, and is not engaged with the long hole. In addition, a protrusion that extends to the arm of the column bracket (distance bracket) is formed on the detent member, and the end of the protrusion is bent into a key shape and inserted into a hole formed at the end of the arm. (See cited document 2 [0012], FIG. 2 and FIG. 3).

特許文献3は、適度な弾性及び剛性の樹脂材により一体成形され、ナットに嵌合する嵌合穴を設けた本体部と、この本体部の中心を挟んで対向する位置にそれぞれ設けられた一対の係合部とを備えた回り止め部材(回止部材)を用いた締付ボルト組付構造を開示している。この回り止め部材の嵌合穴は、ナットの高さ寸法と略同等の深さ寸法をもつ丸穴で、径寸法はナットにおける対角寸法より適宜寸法だけ小径に設定されている。これにより、回り止め部材の嵌合穴にナットを嵌合する際、ナットは嵌合穴に弾圧嵌合され、回り止め部材側の弾性復元力による締付力で、回り止め部材とナットとが一体的に結合固定される(引用文献3[0026]、図1及び図2参照)。   In Patent Document 3, a body part integrally formed of a resin material having appropriate elasticity and rigidity and provided with a fitting hole that fits into a nut, and a pair provided at positions facing each other across the center of the body part. A tightening bolt assembly structure using a detent member (rotation member) provided with an engaging portion is disclosed. The fitting hole of the detent member is a round hole having a depth dimension substantially the same as the height dimension of the nut, and the diameter dimension is set to a smaller diameter than the diagonal dimension of the nut. As a result, when the nut is fitted into the fitting hole of the non-rotating member, the nut is elastically fitted into the fitting hole, and the anti-rotating member and the nut are separated by the tightening force due to the elastic restoring force on the non-rotating member side. They are integrally coupled and fixed (see cited document 3 [0026], FIG. 1 and FIG. 2).

そして、特許文献4は、締付ボルト(ボルト)に係合する回り止め部材を用いた締付ボルト組付構造を開示している。回り止め部材の一端部には、締付ボルトの頭部に係合可能な複数の爪を周面に有する係合孔が形成されており、この係合孔を締付ボルトの頭部に相対回動不能に嵌めている。また、回り止め部材の他端部に円弧孔が形成され、固定ねじを締め付けている。前記円弧孔は、締付ボルトの締め付けトルクを微調整するときに、固定ねじを緩めて回り止め部材を締付ボルト回りに微小回転させる際に用いられる(引用文献4[0039]及び[0040]、図9及び図10参照)。   And patent document 4 is disclosing the fastening bolt assembly | attachment structure using the detent | locking member engaged with a fastening bolt (bolt). An engagement hole having a plurality of claws engageable with the head of the tightening bolt is formed at one end of the rotation preventing member, and the engagement hole is relative to the head of the tightening bolt. Fits non-rotatable. In addition, an arc hole is formed in the other end of the anti-rotation member, and a fixing screw is tightened. The arc hole is used when the tightening torque of the tightening bolt is finely adjusted and the fixing screw is loosened to slightly rotate the rotation preventing member around the tightening bolt (reference documents 4 [0039] and [0040]. FIG. 9 and FIG. 10).

実開平05-080955号公報Japanese Utility Model Publication No. 05-080955 特開平10-016796号公報Japanese Patent Laid-Open No. 10-016796 特開2000-127988号公報JP 2000-127988 特開2004-136870号公報JP 2004-136870 A

特許文献1〜特許文献4の締付ボルト組付構造において、チルトレバーの回転操作に要する操作力(締付トルク)を調整するには、締付ボルト又はナットの回転規制が解除されなければならない。特許文献1及び特許文献2の締付ボルト組付構造は、回り止め部材によって締付ボルトの回転が規制されることから、締付ボルトに螺着するナットの締付量を調整することになる。ところが、通常ナットに対してチルトレバーを装着するため、組付け後に操作力(締付トルク)を調整するには、チルトレバーを取り外す必要が生ずる。仮に、チルトレバーを取り外さないで操作力(締付トルク)を調整しようとすれば、回り止め部材を取り外してチルトレバーを位置固定しながら締付ボルトを回転させるか、チルトレバーとは別に締付ボルトのみを回転させることのできる特別な構成が必要となる。   In the tightening bolt assembly structure of Patent Literature 1 to Patent Literature 4, in order to adjust the operating force (tightening torque) required for the rotation operation of the tilt lever, the tightening bolt or nut rotation regulation must be released. . In the tightening bolt assembly structure of Patent Document 1 and Patent Document 2, since the rotation of the tightening bolt is restricted by the detent member, the tightening amount of the nut screwed to the tightening bolt is adjusted. . However, since the tilt lever is usually attached to the nut, it is necessary to remove the tilt lever in order to adjust the operating force (tightening torque) after assembly. If you want to adjust the operating force (tightening torque) without removing the tilt lever, remove the detent member and rotate the tightening bolt while fixing the tilt lever, or tighten it separately from the tilt lever. A special configuration is required that allows only the bolt to rotate.

また、特許文献3の締付ボルト組付構造は、チルトレバーは締付ボルトと一体に構成されることが通例であるので、もはや回り止め部材を取り外して、締付ボルトに螺着するナットの締付量を調整するほかない。特許文献3の回り止め部材は、長孔に係合部を差し込んでいるだけなので、比較的着脱が容易である。しかし、操作力(締付トルク)の調整のために回り止め部材を取り外す手間が発生することに変わりはない。これに対し、特許文献4の締付ボルト組付構造は、回り止め部材自体を締付ボルトに対する姿勢を変化させることができ、比較的操作力(締付トルク)の調整が容易と言える。しかし、前記操作力(締付トルク)の調整も、円弧孔の範囲でしかなく、例えば締付ボルト自体を取り換える際には、やはり回り止め部材を取り外さなければならない。   Further, in the tightening bolt assembly structure of Patent Document 3, it is usual that the tilt lever is configured integrally with the tightening bolt. Therefore, the nut that removes the anti-rotation member and is screwed to the tightening bolt is no longer necessary. There is no choice but to adjust the tightening amount. The anti-rotation member of Patent Document 3 is relatively easy to attach and detach because only the engaging portion is inserted into the long hole. However, there is no change in the trouble of removing the detent member in order to adjust the operating force (tightening torque). On the other hand, the tightening bolt assembly structure of Patent Document 4 can change the posture of the anti-rotation member itself with respect to the tightening bolt, and it can be said that the operation force (tightening torque) can be adjusted relatively easily. However, the adjustment of the operating force (tightening torque) is also limited to the range of the arc hole. For example, when the fastening bolt itself is replaced, the detent member must be removed.

実際には、操作力(締付トルク)の調整が必要となるのは組付け時であり、組付け後に操作力(締付トルク)を調整する機会はそれほど多くない。しかし、必要に応じて操作力(締付トルク)が調整できたり、更に締付ボルト又はナットの交換が容易になることは、自動車部品の保守性(メンテナンス性)が向上する等、好ましい。そこで、組付け時のみならず、組付け後でも容易にチルトレバーの回転操作に要する操作力(締付トルク)を調整できながら、前記調整以外では締付ボルトに対するナットの回転を必要十分に規制できる回り止め部材を用いて、保守性の高い締付ボルト組付構造を開発するため、検討した。   Actually, the adjustment of the operating force (tightening torque) is required at the time of assembly, and there are not many opportunities to adjust the operating force (tightening torque) after the assembly. However, it is preferable that the operating force (tightening torque) can be adjusted as necessary, and that replacement of the fastening bolts or nuts is facilitated, such as improvement in maintainability (maintenability) of automobile parts. Therefore, it is possible to adjust the operating force (tightening torque) required for the tilt lever rotation easily not only during assembly but also after assembly. In order to develop a tightening bolt assembly structure with high maintainability using a non-rotating member that can be rotated, we studied.

検討の結果開発したものが、車体側ブラケット及びコラム側ブラケットに締付ボルトを挿通し、この締付ボルトにチルトレバーを取り付けて構成されるチルト機構を有するステアリングコラムの締付ボルト組付構造において、車体側ブラケット又はコラム側ブラケットから突出する締付ボルトの雄ねじ部に螺着するナットに回り止め部材を装着してなり、回り止め部材は締付ボルトの貫通孔を設けた本体部に、締付ボルトを挿通してコラム側ブラケットと共に昇降する軸受けスペーサに係合する位置規制片と、ナットに係合する回転規制片とを設けてなり、位置規制片は剛性を、回転規制片は弾性をそれぞれ備える締付ボルト組付構造である。   What was developed as a result of the study was a tightening bolt assembly structure of a steering column having a tilt mechanism that is configured by inserting a tightening bolt into the body side bracket and the column side bracket and attaching a tilt lever to the tightening bolt. The anti-rotation member is attached to the nut screwed to the male screw portion of the tightening bolt protruding from the vehicle body side bracket or the column side bracket, and the anti-rotation member is fastened to the main body portion provided with the through hole of the tightening bolt. A position restricting piece that engages with a bearing spacer that goes up and down with the column side bracket through the attached bolt and a rotation restricting piece that engages with the nut are provided. The position restricting piece is rigid and the rotation restricting piece is elastic. Each is a tightening bolt assembly structure.

本発明の締付ボルト組付構造は回り止め部材に特徴を有する。この回り止め部材は、締付ボルトの雄ねじ部に嵌め込み、締付ボルトを挿通してコラム側ブラケットと共に昇降する軸受けスペーサに位置規制片を係合して、装着位置及び装着姿勢を固定する。具体的な位置規制片は、軸受けスペーサの対向する両縁部を挟む一対が本体部から車体側ブラケット又はコラム側ブラケットに向けて張り出す構成が好ましい。このほか、軸受けスペーサに対する位置規制片の係合は、軸受けスペーサに設けた凹部又は孔に位置規制片を差し込む構成、軸受けスペーサに設けた凸部又は突起に位置規制片の凹部又は孔を嵌め込む構成、そして軸受けスペーサに設けた凸部又は突起に位置規制片を挟持させる構成でもよい。   The tightening bolt assembling structure of the present invention is characterized by a detent member. The detent member is fitted in the male thread portion of the tightening bolt, and the position restricting piece is engaged with a bearing spacer that is inserted through the tightening bolt and moves up and down together with the column side bracket, thereby fixing the mounting position and the mounting posture. The specific position restricting piece preferably has a configuration in which a pair of both edge portions of the bearing spacer facing each other protrude from the main body portion toward the vehicle body side bracket or the column side bracket. In addition, the position restricting piece is engaged with the bearing spacer by inserting the position restricting piece into the recessed portion or hole provided in the bearing spacer, and the recessed portion or hole of the position restricting piece is fitted into the convex portion or protrusion provided in the bearing spacer. The structure and the structure which clamps a position control piece on the convex part or protrusion provided in the bearing spacer may be sufficient.

そして、回り止め部材は、本体部の貫通孔から突出する締付ボルトの雄ねじ部へ螺着したナットに回転規制片を係合する。本体部は、例えば軸受けスペーサに剛性のある位置規制片を係合し、更にスペーサ及びナットに挟持されるため、完全に位置規制される。そして、こうして位置規制された本体部に設けた弾性のある回転規制片によりナットを挟むことで、ナットの回転規制を実現する。しかし、回転規制片は弾性を有するため、締付ボルトの回転による回転トルク以上の回転トルクを与えれば、回転規制片を押し広げながら回転させることができる。   And a rotation prevention member engages a rotation control piece with the nut screwed to the external thread part of the clamping bolt which protrudes from the through-hole of a main-body part. The main body is engaged with a rigid position restricting piece on a bearing spacer, for example, and is sandwiched between the spacer and the nut, so that the position of the main body is completely restricted. And the rotation regulation of a nut is implement | achieved by pinching | pinching a nut with the elastic rotation regulation piece provided in the main-body part by which the position regulation was carried out in this way. However, since the rotation restricting piece has elasticity, if a rotation torque greater than the rotation torque by the rotation of the tightening bolt is given, the rotation restricting piece can be rotated while being spread.

具体的な回転規制片は、ナットの対向する側面を挟む一対が本体部から車体側ブラケット又はコラム側ブラケットから逆向きに張り出す構成が好ましい。この場合、回り止め部材の本体部から張り出す一対の回転規制片は、ナットの対向する側面の間隔より前記回転規制片の間隔がわずかに狭くするとよい。これにより、弾性のある回転規制片は、常態としてナットの回転規制を図りながら、大きな回転トルクを与えればナットを回すことができるようにする。こうした回転規制片としては、側面視S字状のバネ片で、ナットの側面に対する凸湾曲部のみを前記ナットの側面に圧接する構成を例示できる。前記側面視S字状の回転規制片を有する回り止め部材は、本体部、位置規制片及び回転規制片を一体の金属板から形成できる。   The specific rotation restricting piece preferably has a configuration in which a pair of opposite side faces of the nut projects from the main body portion in the opposite direction from the vehicle body side bracket or the column side bracket. In this case, it is preferable that the pair of rotation restricting pieces protruding from the main body portion of the rotation preventing member has a slightly narrower interval between the rotation restricting pieces than the interval between the opposing side surfaces of the nut. As a result, the elastic rotation restricting piece can rotate the nut when a large rotational torque is applied while normally restricting the rotation of the nut. As such a rotation restricting piece, a configuration in which only a convex curved portion with respect to the side surface of the nut is press-contacted to the side surface of the nut by a S-shaped spring piece in a side view. The rotation preventing member having the S-shaped rotation restricting piece in the side view can be formed from a single metal plate with the main body portion, the position restricting piece and the rotation restricting piece.

回転規制片は、ナットの対向する2つの側面に係合してナットの回転を規制しているだけなので、ナットの残る4つの側面は回転規制片の間から露出しており、この残る4つの側面にスパナ等を係合してナットを回転させることはできる。しかし、より容易にナットを回転させるため、回り止め部材の本体部から張り出す一対の回転規制片は、締付ボルトの雄ねじ部に螺着するナットより低くして、前記回転規制片を押し開きながらナットのみを回転させるとよい。また、本発明の締付ボルト組付構造用にナットを製造できれば、締付ボルトの雄ねじ部に螺着するナットは、回り止め部材の本体部から張り出す一対の回転規制片より高くして、前記回転規制片を押し開きながらナットのみを回転させてもよい。   Since the rotation restricting piece only engages the two opposite side surfaces of the nut to restrict the rotation of the nut, the remaining four side surfaces of the nut are exposed from between the rotation restricting pieces, and the remaining four The nut can be rotated by engaging a wrench or the like on the side surface. However, in order to rotate the nut more easily, the pair of rotation restricting pieces protruding from the main body portion of the locking member are set lower than the nut screwed on the male screw portion of the tightening bolt to push the rotation restricting piece open. It is better to rotate only the nut. Further, if the nut can be manufactured for the tightening bolt assembly structure of the present invention, the nut screwed to the male screw portion of the tightening bolt is made higher than the pair of rotation restricting pieces projecting from the main body portion of the rotation preventing member, Only the nut may be rotated while pushing the rotation restricting piece open.

本発明により、組付け時のみならず、組付け後でも容易にチルトレバーの回転操作に要する操作力(締付トルク)を調整できながら、前記調整以外では締付ボルトに対するナットの回転を必要十分に規制できる回り止め部材を用いて、保守性の高い締付ボルト組付構造が提供できるようになる。しかも、本発明の回り止め部材は、金属板から容易に成形でき、組付けも容易であるため、製造コスト及び組付けコストを低減できる。こうして、本発明は費用対効果の高い締付ボルト組付構造を実現する効果を発揮する。   According to the present invention, the operation force (tightening torque) required for the rotation operation of the tilt lever can be easily adjusted not only at the time of assembling but also after the assembling. By using the non-rotating member that can be regulated, a tightening bolt assembly structure with high maintainability can be provided. In addition, since the anti-rotation member of the present invention can be easily formed from a metal plate and can be easily assembled, manufacturing costs and assembly costs can be reduced. Thus, the present invention exhibits the effect of realizing a cost-effective tightening bolt assembly structure.

以下、本発明の実施形態について図を参照しながら説明する。図1は本発明を適用した締付ボルト組付構造を表すチルト機構を有するステアリングコラムの部分左側面図、図2は本例のステアリングコラムの部分底面図、図3は図1中A−A断面図、図4は左前斜め下方から見た本例のステアリングコラムの部分斜視図、図5は本例のステアリングコラムの図4相当分解斜視図であり、図6は回り止め部材41の回転規制片414をナット35の側面351に係合している状態を表す図3中B矢視部分拡大断面図である。各図は、例えばステアリングコラムに見られるように、本発明の説明に必要でない部分の図示は省略している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial left side view of a steering column having a tilt mechanism representing a tightening bolt assembly structure to which the present invention is applied, FIG. 2 is a partial bottom view of the steering column of this example, and FIG. 3 is AA in FIG. FIG. 4 is a partial perspective view of the steering column of this example viewed from diagonally below the left front, FIG. 5 is an exploded perspective view of the steering column of this example corresponding to FIG. 4, and FIG. FIG. 4 is a partially enlarged sectional view taken along arrow B in FIG. 3 showing a state where a piece 414 is engaged with a side surface 351 of a nut 35. In each figure, for example, as seen in a steering column, illustration of parts not necessary for the description of the present invention is omitted.

本例の締付ボルト組付構造は、図1〜図5に見られるように、コラムジャケット12に取り付けた扁平な断面U字状のコラム側ブラケット11の側面を、衝撃吸収時に車体(図示略)と分離するカプセル22を介して前記車体に固定した車体側ブラケット21から降ろした一対の挟持片23の間に嵌め込み、コラム側ブラケット11の側面に設けたステアリングコラムの延在方向のコラム側長孔13と、車体側ブラケット21の挟持片23に設けたステアリングコラムの略延在直交方向の車体側長孔24とを連通させ、各車体側長孔24にレバー側軸受けスペーサ31及びナット側軸受けスペーサ32をそれぞれ介装した上で、レバー側軸受けスペーサ31の軸受け孔311からチルトレバー33に連動する締付ボルト34を車体側長孔24及びコラム側長孔13を通じてナット側軸受けスペーサ32にまで貫通させ、前記ナット側軸受けスペーサ32の軸受け孔321から突出する締付ボルト34の雄ねじ部341にナット35を締め付けて構成される。   As shown in FIGS. 1 to 5, the tightening bolt assembly structure of this example is configured so that the side surface of the column-side bracket 11 having a flat U-shaped cross section attached to the column jacket 12 The column side length in the extending direction of the steering column provided on the side surface of the column side bracket 11 is fitted between the pair of clamping pieces 23 lowered from the vehicle body side bracket 21 fixed to the vehicle body via the capsule 22 separated from The hole 13 and the vehicle body side long hole 24 in the substantially extending orthogonal direction of the steering column provided in the clamping piece 23 of the vehicle body side bracket 21 are communicated, and the lever side bearing spacer 31 and the nut side bearing are connected to each vehicle body side long hole 24. With each spacer 32 interposed, a tightening bolt 34 interlocked with the tilt lever 33 from the bearing hole 311 of the lever side bearing spacer 31 is passed through the vehicle body side long hole 24 and the column side long hole 13 to the nut side bearing spacer 32. Until it passed through, and tightening the nut 35 to the male screw portion 341 of the fastening bolt 34 which projects from the bearing hole 321 of the nut-side bearing spacer 32.

このステアリングコラムは、チルト軸(図示略)を中心に、チルトレバー33の回転操作によりナット35の締め付けを弛めた状態で、前記コラム側長孔13及び車体側長孔24の交差する範囲で傾斜角及び前後位置を調整できる。このとき、レバー側軸受けスペーサ31及びナット側軸受けスペーサ32はそれぞれ対応する車体側長孔24に規制ブロック312,322を嵌め込んで姿勢を規制されており、ステアリングコラムと共に昇降する。また、チルトレバー33の回転操作範囲は、前記レバー側軸受けスペーサ31に設けた一対の規制突起313により決定されており、チルトレバー33の不必要に大きな回転操作によるナット35の弛みを防止している。   This steering column is in a range where the column side long hole 13 and the vehicle body side long hole 24 intersect with the nut 35 tightened by rotating the tilt lever 33 around a tilt axis (not shown). The tilt angle and front / rear position can be adjusted. At this time, the postures of the lever-side bearing spacer 31 and the nut-side bearing spacer 32 are regulated by fitting the regulation blocks 312 and 322 in the corresponding vehicle body-side long holes 24, and ascend and descend with the steering column. Further, the rotation operation range of the tilt lever 33 is determined by a pair of restricting projections 313 provided on the lever side bearing spacer 31 to prevent the nut 35 from loosening due to an unnecessarily large rotation operation of the tilt lever 33. Yes.

本発明を特徴付ける回り止め部材41は、ナット側軸受けスペーサ32から突出する締付ボルト34の雄ねじ部341に螺着するナット35に回り止め部材41を装着している。本例の回り止め部材41は、締付ボルト34の貫通孔411を設けた平板状の本体部412に、ナット側軸受けスペーサ32の縁部に係合する位置規制片413と、ナット35の側面351に係合する回転規制片414とを設けている(図6参照)。位置規制片413は、ナット側軸受けスペーサ32の対向する両縁部を挟む一対の断面L字状片で、ナット側軸受けスペーサ32に向けて本体部412から張り出している。回転規制片414は、ナット35の対向する側面351を挟む一対の断面S字状片で、前記位置規制片413とは逆向きに本体部412から張り出している。両者は、互いに直交関係で本体部412から張り出している。   The anti-rotation member 41 that characterizes the present invention has the anti-rotation member 41 attached to a nut 35 that is screwed into a male thread portion 341 of a tightening bolt 34 protruding from a nut-side bearing spacer 32. The anti-rotation member 41 of this example includes a plate-shaped main body portion 412 provided with a through-hole 411 of the tightening bolt 34, a position regulating piece 413 that engages with an edge portion of the nut-side bearing spacer 32, and a side surface of the nut 35. A rotation restricting piece 414 that engages with 351 is provided (see FIG. 6). The position restricting piece 413 is a pair of L-shaped pieces with a cross-section sandwiching opposing edges of the nut-side bearing spacer 32, and projects from the main body 412 toward the nut-side bearing spacer 32. The rotation restricting pieces 414 are a pair of S-shaped pieces having a cross section sandwiching the opposite side surfaces 351 of the nut 35 and project from the main body portion 412 in the direction opposite to the position restricting pieces 413. Both project from the main body portion 412 in an orthogonal relationship.

本例の回り止め部材41は、本体部412の板厚と同じ位置規制片413及び回転規制片414を構成しているが、位置規制片413は本体部412からの張り出し量が少なく、本体部412から折り曲げられて構成されているため、剛性を備えて変形しない。しかし、回転規制片414は本体部412からの張り出し量が多く、断面S字状に加工されていることから、本体部412との折り曲げ部位を軸として弾性変形する一種のバネ片になっている。この回転規制片414は、ナット35の側面351に対する凸湾曲部415の間隔がナット35の対向する側面351の間隔より狭いため、図6に見られるように、前記凸湾曲部415のみをナット35の側面351に圧接してナット35を挟持し、回り止めを図るようになっている。また、回転規制片414は必要な弾性を付与するために高くなっていることから、本例の締付ボルト組付構造は規格品より高いナット35を用い、ナット35の側面351を回転規制片414より突出させている。   The anti-rotation member 41 of this example constitutes a position restricting piece 413 and a rotation restricting piece 414 having the same thickness as the main body part 412. However, the position restricting piece 413 has a small amount of protrusion from the main body part 412 and the main body part. Since it is bent from 412, it is rigid and does not deform. However, since the rotation restricting piece 414 has a large amount of protrusion from the main body portion 412 and is processed to have an S-shaped cross section, the rotation restricting piece 414 is a kind of spring piece that is elastically deformed around the bent portion with the main body portion 412. . In this rotation restricting piece 414, since the interval between the convex curved portions 415 with respect to the side surface 351 of the nut 35 is narrower than the interval between the opposing side surfaces 351 of the nut 35, as shown in FIG. The nut 35 is clamped against the side surface 351 to prevent rotation. In addition, since the rotation restricting piece 414 is high to give necessary elasticity, the tightening bolt assembly structure of this example uses a nut 35 higher than a standard product, and the side surface 351 of the nut 35 is connected to the rotation restricting piece. It protrudes from 414.

図7は締付ボルト組付構造のナット35を回してチルトレバー33の操作力(締付トルク)を調整している状態を表すステアリングコラムの図1相当部分左側面図、図8は締付ボルト組付構造のナット35を回してチルトレバー33の操作力(締付トルク)を調整している状態を表すステアリングコラムの図2相当部分底面図、図9は締付ボルト組付構造のナット35を回してチルトレバー33の操作力(締付トルク)を調整している状態を表す左前斜め下方から見たステアリングコラムの図4相当部分斜視図であり、そして図10は締付ボルト組付構造のナット35を回してチルトレバー33の操作力(締付トルク)を調整している状態を表す図6相当部分拡大断面図である。   FIG. 7 is a left side view of the steering column corresponding to FIG. 1 showing a state in which the operating force (tightening torque) of the tilt lever 33 is adjusted by turning the nut 35 of the tightening bolt assembly structure, and FIG. FIG. 2 is a partial bottom view of the steering column showing a state in which the operation force (tightening torque) of the tilt lever 33 is adjusted by turning the nut 35 of the bolt assembly structure, and FIG. 9 is the nut of the tightening bolt assembly structure. FIG. 10 is a partial perspective view corresponding to FIG. 4 of the steering column as viewed from diagonally below the left front, showing a state in which the operating force (tightening torque) of the tilt lever 33 is adjusted by turning 35, and FIG. FIG. 7 is a partially enlarged cross-sectional view corresponding to FIG. 6 showing a state in which the operating force (tightening torque) of the tilt lever 33 is adjusted by turning the nut 35 of the structure.

本例の締付ボルト組付構造では、上述したように、回転規制片414からナット35が突出している。これから、図7〜図9に見られるように、例えば前記突出部分をトルクレンチ(図示略)で回すことにより、締付ボルト34の雄ねじ部341に対するナット35の締付量を加減して、チルトレバー33の回転操作に際する操作力(締付トルク)を調整できる。このとき、回り止め部材41は、ナット側軸受けスペーサ32から離脱する方向に本体部412がナット35に規制され、位置規制片413が前記ナット軸受けスペーサの両縁部に係合しているため、位置規制されている。よって、図10に見られるように、回転規制片414のみがナット35の半径方向に押し広げられて、ナット35を周方向間隔、すなわち60度単位で回すことができる。   In the tightening bolt assembly structure of this example, the nut 35 protrudes from the rotation restricting piece 414 as described above. As shown in FIGS. 7 to 9, the amount of tightening of the nut 35 with respect to the male threaded portion 341 of the tightening bolt 34 is adjusted by turning the projecting portion with a torque wrench (not shown), for example. The operating force (tightening torque) for rotating the lever 33 can be adjusted. At this time, since the rotation preventing member 41 has the main body portion 412 restricted by the nut 35 in the direction away from the nut side bearing spacer 32, and the position restricting pieces 413 are engaged with both edge portions of the nut bearing spacer, The position is regulated. Accordingly, as seen in FIG. 10, only the rotation restricting piece 414 is pushed and expanded in the radial direction of the nut 35, and the nut 35 can be rotated in the circumferential interval, that is, in units of 60 degrees.

本例の締付ボルト組付構造を組み付ける際は、ナット側軸受けスペーサ32に回り止め部材41を装着し、更に前記回り止め部にナット35を嵌め込むようにして、ナット側軸受けスペーサ32の軸受け孔321から突出する締付ボルト34の雄ねじ部341を捩じ込むようにするとよい。そして、本例の締付ボルト組付構造を組み付けた後、締付ボルト34の回転トルクを調整する際は、上述のように、回転規制片414を押し広げるようにしてナット35のみを回せばよい。このように、本発明の締付ボルト組付構造によれば、組付は容易でありながら、必要に応じて適宜ナット35を回してチルトレバー33の操作力(締付トルク)を調整できる利点がある。   When assembling the tightening bolt assembly structure of the present example, the rotation-preventing member 41 is attached to the nut-side bearing spacer 32, and the nut 35 is fitted into the rotation-preventing portion so that the bearing hole 321 of the nut-side bearing spacer 32 is fitted. It is preferable to screw the male thread portion 341 of the fastening bolt 34 projecting from the screw. Then, after adjusting the tightening bolt assembly structure of this example, when adjusting the rotational torque of the tightening bolt 34, as described above, only the nut 35 is rotated so as to spread the rotation restricting piece 414. Good. Thus, according to the tightening bolt assembly structure of the present invention, the assembly is easy, but the advantage is that the operating force (tightening torque) of the tilt lever 33 can be adjusted by turning the nut 35 as necessary. There is.

本発明を適用した締付ボルト組付構造を表すチルト機構を有するステアリングコラムの部分左側面図である。It is a partial left view of a steering column having a tilt mechanism that represents a tightening bolt assembly structure to which the present invention is applied. 本例のステアリングコラムの部分底面図である。It is a partial bottom view of the steering column of this example. 図1中A−A断面図である。It is AA sectional drawing in FIG. 左前斜め下方から見た本例のステアリングコラムの部分斜視図である。It is a fragmentary perspective view of the steering column of this example seen from the left front diagonally downward. 本例のステアリングコラムの図4相当分解斜視図である。FIG. 5 is an exploded perspective view corresponding to FIG. 4 of the steering column of this example. 回り止め部材の回転規制片をナットの側面に係合している状態を表す図3中B矢視部分拡大断面図である。FIG. 4 is a partial enlarged cross-sectional view taken along arrow B in FIG. 3 illustrating a state in which a rotation restricting piece of the rotation preventing member is engaged with a side surface of the nut. 締付ボルト組付構造のナットを回してチルトレバーの操作力(締付トルク)を調整している状態を表すステアリングコラムの図1相当部分左側面図である。FIG. 3 is a left side view of a portion corresponding to FIG. 1 of the steering column showing a state in which the operating force (tightening torque) of the tilt lever is adjusted by turning the nut of the fastening bolt assembly structure. 締付ボルト組付構造のナットを回してチルトレバーの操作力(締付トルク)を調整している状態を表すステアリングコラムの図2相当部分底面図である。FIG. 3 is a partial bottom view corresponding to FIG. 2 of a steering column showing a state in which an operation force (tightening torque) of a tilt lever is adjusted by turning a nut of a fastening bolt assembly structure. 締付ボルト組付構造のナットを回してチルトレバーの操作力(締付トルク)を調整している状態を表す左前斜め下方から見たステアリングコラムの図4相当部分斜視図である。FIG. 5 is a partial perspective view corresponding to FIG. 4 of the steering column as viewed from diagonally below the left front, showing a state in which the operating force (tightening torque) of the tilt lever is adjusted by turning the nut of the tightening bolt assembly structure. 締付ボルト組付構造のナットを回してチルトレバーの操作力(締付トルク)を調整している状態を表す図6相当部分拡大断面図である。FIG. 7 is a partially enlarged cross-sectional view corresponding to FIG. 6 illustrating a state in which the operating force (tightening torque) of the tilt lever is adjusted by turning the nut of the fastening bolt assembly structure.

符号の説明Explanation of symbols

11 コラム側ブラケット
21 車体側ブラケット
31 レバー側軸受けスペーサ
32 ナット側軸受けスペーサ
33 チルトレバー
34 締付ボルト
341 雄ねじ部
35 ナット
41 回り止め部材
411 貫通孔
412 本体部
413 位置規制片
414 回転規制片
415 凸湾曲部
11 Column side bracket
21 Car body side bracket
31 Lever side bearing spacer
32 Nut bearing spacer
33 Tilt lever
34 Tightening bolt
341 Male thread
35 nut
41 Non-rotating member
411 Through hole
412 Body
413 Position restriction piece
414 Rotation restricting piece
415 Convex curve

Claims (7)

車体側ブラケット及びコラム側ブラケットに締付ボルトを挿通し、この締付ボルトにチルトレバーを取り付けて構成されるチルト機構を有するステアリングコラムの締付ボルト組付構造において、車体側ブラケット又はコラム側ブラケットから突出する締付ボルトの雄ねじ部に螺着するナットに回り止め部材を装着してなり、回り止め部材は締付ボルトの貫通孔を設けた本体部に、締付ボルトを挿通してコラム側ブラケットと共に昇降する軸受けスペーサに係合する位置規制片と、ナットに係合する回転規制片とを設けてなり、位置規制片は剛性を、回転規制片は弾性をそれぞれ備えることを特徴とする締付ボルト組付構造。 In a steering column tightening bolt assembly structure having a tilt mechanism configured by inserting a tightening bolt into a vehicle body side bracket and a column side bracket and attaching a tilt lever to the tightening bolt, the vehicle body side bracket or the column side bracket An anti-rotation member is attached to the nut screwed into the male screw part of the tightening bolt protruding from the column, and the anti-rotation member is inserted into the main body part provided with a through-hole of the tightening bolt and the tightening bolt is inserted into the column side. A position restricting piece that engages with a bearing spacer that moves up and down together with the bracket and a rotation restricting piece that engages with the nut are provided. The position restricting piece has rigidity and the rotation restricting piece has elasticity. Bolt assembly structure. 位置規制片は、軸受けスペーサの対向する両縁部を挟む一対が本体部から車体側ブラケット又はコラム側ブラケットに向けて張り出す請求項1記載の締付ボルト組付構造。 The tightening bolt assembling structure according to claim 1, wherein the pair of position restricting pieces is extended from the main body portion toward the vehicle body side bracket or the column side bracket. 回転規制片は、ナットの対向する側面を挟む一対が本体部から車体側ブラケット又はコラム側ブラケットから逆向きに張り出す請求項1又は2記載の締付ボルト組付構造。 The tightening bolt assembling structure according to claim 1 or 2, wherein a pair of the rotation restricting pieces sandwiching opposite side surfaces of the nut projects from the main body portion in a reverse direction from the vehicle body side bracket or the column side bracket. 回り止め部材の本体部から張り出す一対の回転規制片は、ナットの対向する側面の間隔より前記回転規制片の間隔がわずかに狭い請求項3記載の締付ボルト組付構造。 The tightening bolt assembling structure according to claim 3, wherein the pair of rotation restricting pieces projecting from the main body portion of the rotation preventing member has a slightly narrower interval between the rotation restricting pieces than an interval between opposing side surfaces of the nut. 回り止め部材の本体部から張り出す一対の回転規制片は、側面視S字状のバネ片で、ナットの側面に対する凸湾曲部のみを前記ナットの側面に圧接する請求項3又は4記載の締付ボルト組付構造。 The pair of rotation restricting pieces projecting from the main body portion of the rotation preventing member are S-shaped spring pieces in a side view, and only the convex curved portion with respect to the side surface of the nut is pressed against the side surface of the nut. Bolt assembly structure. 回り止め部材の本体部から張り出す一対の回転規制片は、締付ボルトの雄ねじ部に螺着するナットより低くして、前記回転規制片を押し開きながらナットのみを回転させることができる請求項3〜5いずれか記載の締付ボルト組付構造。 The pair of rotation restricting pieces projecting from the main body portion of the rotation preventing member is lower than a nut screwed to the male screw portion of the tightening bolt, and only the nut can be rotated while pushing and opening the rotation restricting piece. The tightening bolt assembly structure according to any one of 3 to 5. 締付ボルトの雄ねじ部に螺着するナットは、回り止め部材の本体部から張り出す一対の回転規制片より高くして、前記回転規制片を押し開きながらナットのみを回転させることができる請求項3〜5いずれか記載の締付ボルト組付構造。 The nut screwed to the male screw portion of the tightening bolt is higher than the pair of rotation restricting pieces protruding from the main body portion of the rotation preventing member, and only the nut can be rotated while pushing and opening the rotation restricting piece. The tightening bolt assembly structure according to any one of 3 to 5.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139779U (en) * 1986-02-27 1987-09-03
JPH03108582U (en) * 1990-02-23 1991-11-07
JPH1078018A (en) * 1996-09-05 1998-03-24 Sugiura Seisakusho:Kk Coming-off preventing cap and coming-off preventing internal thread member including this coming-off preventing cap
JPH10217978A (en) * 1997-01-31 1998-08-18 Fuji Kiko Co Ltd Steering column tilt holding force adjusting mechanism
JP2000035022A (en) * 1998-07-21 2000-02-02 Fuji Electric Co Ltd Connecting bolt for line disc

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139779U (en) * 1986-02-27 1987-09-03
JPH03108582U (en) * 1990-02-23 1991-11-07
JPH1078018A (en) * 1996-09-05 1998-03-24 Sugiura Seisakusho:Kk Coming-off preventing cap and coming-off preventing internal thread member including this coming-off preventing cap
JPH10217978A (en) * 1997-01-31 1998-08-18 Fuji Kiko Co Ltd Steering column tilt holding force adjusting mechanism
JP2000035022A (en) * 1998-07-21 2000-02-02 Fuji Electric Co Ltd Connecting bolt for line disc

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