JP6417179B2

JP6417179B2 - Saddle riding vehicle

Info

Publication number: JP6417179B2
Application number: JP2014209053A
Authority: JP
Inventors: 岩田　茂行; 茂行岩田
Original assignee: Kawasaki Jukogyo KK
Current assignee: Kawasaki Motors Ltd
Priority date: 2014-10-10
Filing date: 2014-10-10
Publication date: 2018-10-31
Anticipated expiration: 2034-10-10
Also published as: JP2016078502A

Description

本発明は、メインシート及びサブシートを備える鞍乗型車両に関する。 The present invention relates to a saddle riding type vehicle including a main seat and a sub seat.

自動二輪車にはユーザの好みに応じて種々のタイプのものがあり、そのうちの一種として、特許文献１に開示されたような所謂アメリカンタイプの自動二輪車がある（例えば、特許文献１参照）。このような自動二輪車では、運転者用シートと同乗者用シートとが一体的に連続しているのが一般的である。 There are various types of motorcycles according to user's preference, and one of them is a so-called American type motorcycle disclosed in Patent Document 1 (see, for example, Patent Document 1). In such a motorcycle, a driver's seat and a passenger's seat are generally continuously integrated.

特開平１０−８６８７４号公報JP-A-10-86874

ところで、運転者用シートと同乗者用シートとの両方が設けられる仕様と、同乗者用シートがなくて運転者用シートのみが設けられる仕様とを、共通の車両で実現することができれば有利である。しかし、同乗者用シートを運転者用シートとは別体で形成し、同乗者用シートを取り外しただけでは、同乗者用シートを取り付けるためのブラケットが車体に残存したり、同乗者用シートを取り付けるための車体側固定部が露出するなどして、外観が良くない。 By the way, it is advantageous if a specification in which both a driver's seat and a passenger's seat are provided and a specification in which only a driver's seat is provided without a passenger's seat can be realized in a common vehicle. is there. However, if the passenger's seat is formed separately from the driver's seat and the passenger's seat is simply removed, the bracket for attaching the passenger's seat will remain on the vehicle body, or the passenger's seat The appearance is not good because the vehicle body side fixing part for mounting is exposed.

そこで本発明は、運転者用シートと同乗者用シートとの両方が設けられる仕様と、同乗者用シートがなくて運転者用シートのみが設けられる仕様とを、外観を損なうことなく共通の車両で実現することを目的とする。 Therefore, the present invention provides a common vehicle in which both a driver's seat and a passenger's seat are provided, and a specification in which only the driver's seat is provided without a passenger's seat without impairing the appearance. It aims to be realized with.

本発明の一態様に係る鞍乗型車両は、車体フレームと、運転者が着座するためのメインシートと、前記メインシートとは別体であり、前記メインシートの後側に配置される、同乗者が着座するためのサブシートと、前記メインシートとは別体であり、前記サブシートが取り付けられるブラケットと、前記ブラケットを前記車体フレームに着脱可能に締結する第１締結部材と、を備え、前記メインシートは、後方に向けて突出したステー部を有し、前記第１締結部材は、前記ステー部と前記ブラケットとを前記車体フレームに共締めする。 A straddle-type vehicle according to an aspect of the present invention is a riding body that is separate from a body frame, a main seat for a driver to sit on, and the main seat, and is disposed on the rear side of the main seat. A sub-seat for a person to sit on, and the main seat, and a bracket to which the sub-seat is attached, and a first fastening member that detachably fastens the bracket to the vehicle body frame, The main seat has a stay portion protruding rearward, and the first fastening member fastens the stay portion and the bracket together with the body frame.

前記構成によれば、サブシート用のブラケットが第１締結部材により車体フレームに着脱可能に固定されるので、サブシートを設置しない場合には、メインシートとは別体のサブシートをブラケットから取り外して且つブラケットを車体フレームから取り外せば、当該ブラケットが車体に残存することがない。そして、サブシート用のブラケットを取り外した状態でも第１締結部材はメインシートのステー部を締結する機能を果たすので、サブシートを設置しない場合でも、第１締結部材の締結対象部分を不所望に露出させずに済む。よって、運転者用シートと同乗者用シートとの両方が設けられる仕様と、同乗者用シートがなくて運転者用シートのみが設けられる仕様とを、外観を損なうことなく共通の車両で実現することができる。また、例えば、第１締結部材がリヤフェンダを通して車体フレームに締結される場合には、サブシート用のブラケットを車体フレームに締結するための専用の開口をリヤフェンダに形成せずに済み、サブシートを設置しない場合の外観を更に良好にすることができる。 According to the above configuration, since the sub seat bracket is detachably fixed to the vehicle body frame by the first fastening member, the sub seat separate from the main seat is removed from the bracket when the sub seat is not installed. If the bracket is removed from the vehicle body frame, the bracket will not remain on the vehicle body. And since the 1st fastening member fulfill | performs the function which fastens the stay part of a main seat also in the state which removed the bracket for sub seats, even when not installing a sub seat, the fastening object part of a 1st fastening member is made undesirably No need to expose. Therefore, a specification in which both a driver's seat and a passenger's seat are provided, and a specification in which only a driver's seat is provided without a passenger's seat are realized in a common vehicle without impairing the appearance. be able to. For example, when the first fastening member is fastened to the vehicle body frame through the rear fender, it is not necessary to form a dedicated opening for fastening the bracket for the sub seat to the vehicle body frame in the rear fender, and the sub seat is installed. If not, the appearance can be further improved.

前記ブラケットは、前記ステー部に対して相対角変位不能に嵌合する嵌合部を有してもよい。 The bracket may include a fitting portion that is fitted to the stay portion so that relative angular displacement is impossible.

前記構成によれば、第１締結部材でブラケットを締結する際に、複雑な回り止め機構を設けずともブラケットが回転するのを簡易に防止することができる。 According to the said structure, when fastening a bracket with a 1st fastening member, it can prevent easily that a bracket rotates, without providing a complicated rotation prevention mechanism.

前記鞍乗型車両は、前記サブシートの下側で且つ前記車体フレームの上側に配置されるリヤフェンダを更に備え、前記ブラケットが、前記リヤフェンダの上側に配置され、前記第１締結部材は、前記リヤフェンダを通して前記ブラケットを前記車体フレームに着脱可能に締結してもよい。 The straddle-type vehicle further includes a rear fender disposed below the sub-seat and above the vehicle body frame, the bracket is disposed above the rear fender, and the first fastening member includes the rear fender. The bracket may be detachably fastened to the vehicle body frame.

前記構成によれば、サブシートを設置しない場合には、サブシート用のブラケットを車体フレームから取り外すことで、当該ブラケットがリヤフェンダの上側の領域に残存することがない。よって、サブシートを取り外してリヤフェンダの上面が露出することになっても、美観が良好に保つことができる。 According to the above configuration, when the sub seat is not installed, the bracket for the sub seat is removed from the vehicle body frame so that the bracket does not remain in the upper region of the rear fender. Therefore, even if the sub-sheet is removed and the upper surface of the rear fender is exposed, the aesthetic appearance can be kept good.

前記第１締結部材は、前記ブラケット及び前記リヤフェンダを前記車体フレームに共締めしてもよい。 The first fastening member may fasten the bracket and the rear fender together with the body frame.

前記構成によれば、リヤフェンダの固定部分をブラケットの固定部分と共通化することができ、美観を向上することができる。 According to the said structure, the fixing | fixed part of a rear fender can be made shared with the fixing | fixed part of a bracket, and aesthetics can be improved.

前記鞍乗型車両は、前記サブシートを前記車体フレームに着脱可能に締結する第２締結部材を更に備え、前記サブシートは、前記ブラケットから離れた位置で前記車体フレームに固定される固定部を有し、前記第２締結部材は、前記固定部及び前記リヤフェンダを前記車体フレームに共締めしてもよい。 The straddle-type vehicle further includes a second fastening member that detachably fastens the sub-seat to the body frame, and the sub-seat has a fixing portion that is fixed to the body frame at a position away from the bracket. And the second fastening member may fasten the fixing portion and the rear fender together with the vehicle body frame.

前記構成によれば、リヤフェンダの固定部分をサブシートの固定部分と共通化することができ、美観を向上することができる。 According to the said structure, the fixing | fixed part of a rear fender can be made shared with the fixing | fixed part of a sub seat, and aesthetics can be improved.

前記サブシートは、前記ブラケットに係合する係合部を有し、前記ブラケットは、前記メインシートの後方で前記車体フレームに固定される車体固定部と、前記車体固定部から上方に離れて配置され、前記サブシートの前記係合部に係合されて前記サブシートの上方移動を阻止する被係合部とを有し、前記被係合部は、前記車体固定部よりも前方に位置してもよい。 The sub-seat has an engaging portion that engages with the bracket, and the bracket is disposed at a rear side of the main seat and fixed to the vehicle body frame, and spaced upward from the vehicle body fixing portion. And an engaged portion that is engaged with the engaging portion of the sub-seat and prevents the sub-sheet from moving upward, and the engaged portion is positioned forward of the vehicle body fixing portion. May be.

前記構成によれば、サブシートの前端部がメインシートの後端部に上方から重なるように容易に配置できる。 According to the said structure, it can arrange | position easily so that the front-end part of a subsheet may overlap with the rear-end part of a main seat from upper direction.

前記ブラケットは、前記メインシートの後方で前記車体フレームに固定される車体固定部と、前記サブシートを下方から支えるための受け部とを有し、前記受け部は、前記車体固定部よりも上方に配置されていてもよい。 The bracket includes a vehicle body fixing portion fixed to the vehicle body frame behind the main seat, and a receiving portion for supporting the sub seat from below, and the receiving portion is located above the vehicle body fixing portion. May be arranged.

前記構成によれば、ブラケットの受け部とそれよりも下方の部材との接触が防がれ、当該接触による傷の発生を防ぐことができる。 According to the said structure, a contact with the receiving part of a bracket and the member below it is prevented, and generation | occurrence | production of the damage | wound by the said contact can be prevented.

本発明によれば、運転者用シートと同乗者用シートとの両方が設けられる仕様と、同乗者用シートがなくて運転者用シートのみが設けられる仕様とを、外観を損なうことなく共通の車両で実現することができる。 According to the present invention, the specification in which both the driver's seat and the passenger's seat are provided and the specification in which only the driver's seat is provided without the passenger's seat are common without impairing the appearance. It can be realized with a vehicle.

実施形態に係る自動二輪車の左側面図である。1 is a left side view of a motorcycle according to an embodiment. （Ａ）は、図１に示す自動二輪車のサブシート及びその近傍の斜視図である。（Ｂ）は、（Ａ）に示す自動二輪車のサブシートを取り外した状態における斜視図である。（Ｃ）は、（Ｂ）に示す自動二輪車の分解斜視図である。（Ｄ）は、（Ｃ）に示す自動二輪車のブラケットを取り外した状態における斜視図である。FIG. 2A is a perspective view of a sub-seat of the motorcycle shown in FIG. 1 and its vicinity. (B) is a perspective view in a state where a sub seat of the motorcycle shown in (A) is removed. (C) is an exploded perspective view of the motorcycle shown in (B). (D) is a perspective view of the motorcycle shown in (C) with the bracket removed. 図２（Ｂ）に示す自動二輪車の要部を示す平面図である。Fig. 3 is a plan view showing a main part of the motorcycle shown in Fig. 2 (B). 図３のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG. 図３のV−V線断面図である。It is the VV sectional view taken on the line of FIG. 図２（Ａ）に示す自動二輪車のサブシートを下方から見た分解斜視図である。FIG. 3 is an exploded perspective view of a sub seat of the motorcycle shown in FIG. 図６に示すサブシートの補強部材本体部を上方から見た斜視図である。It is the perspective view which looked at the reinforcement member main-body part of the sub sheet | seat shown in FIG. 6 from upper direction. 図２（Ａ）に示す自動二輪車の要部を左斜め前方から見て一部断面化した斜視図である。FIG. 3 is a perspective view in which a main part of the motorcycle shown in FIG. 図２（Ａ）に示す自動二輪車の要部を示す平面図である。FIG. 3 is a plan view showing a main part of the motorcycle shown in FIG. 図９のX−X線断面図である。FIG. 10 is a sectional view taken along line XX in FIG. 9. 図９のXI−XI線断面図である。It is the XI-XI sectional view taken on the line of FIG. 図９のXII−XII線断面図である。It is the XII-XII sectional view taken on the line of FIG.

以下、図面を参照して実施形態を説明する。なお、以下の説明で用いる方向の概念は、車両に乗車した運転者から見た方向を基準とする。 Hereinafter, embodiments will be described with reference to the drawings. In addition, the concept of the direction used in the following description is based on the direction viewed from the driver who gets on the vehicle.

図１は、実施形態に係る自動二輪車１の左側面図である。図１に示すように、自動二輪車１は、所謂アメリカンタイプである。自動二輪車１は、従動輪からなる前輪２と、駆動輪からなる後輪３と、金属製の車体フレーム４とを備える。車体フレーム４は、前フレーム部５と、前フレーム部５から連続して後方に延びる後フレーム部６とを備える。前フレーム部５のヘッドパイプ部５ａには、ハンドル７に連結されたステアリング軸（図示せず）が回転自在に挿通され、そのステアリング軸に連結されたフロントフォーク８が前輪２を回転自在に支持する。 FIG. 1 is a left side view of a motorcycle 1 according to the embodiment. As shown in FIG. 1, the motorcycle 1 is a so-called American type. The motorcycle 1 includes a front wheel 2 that is a driven wheel, a rear wheel 3 that is a driving wheel, and a metal body frame 4. The vehicle body frame 4 includes a front frame portion 5 and a rear frame portion 6 that continuously extends rearward from the front frame portion 5. A steering shaft (not shown) connected to the handle 7 is rotatably inserted into the head pipe portion 5a of the front frame portion 5, and a front fork 8 connected to the steering shaft rotatably supports the front wheel 2. To do.

前フレーム部５の上方には、燃料タンク９が配置される。前フレーム部５は、後輪３を駆動する回転動力を発生するエンジン１０（原動機）を支持する。エンジン１０には変速機１１が接続され、変速機１１から出力される動力が動力伝達機構１２（例えば、無端状のチェーン又はベルト）を介して後輪３に伝達される。車体フレーム４には、前後方向に延びるスイングアーム１３の前端部が揺動可能に軸支され、スイングアーム１３の後端部が後輪３を回転自在に軸支する。 A fuel tank 9 is disposed above the front frame portion 5. The front frame portion 5 supports an engine 10 (prime mover) that generates rotational power for driving the rear wheels 3. A transmission 11 is connected to the engine 10, and power output from the transmission 11 is transmitted to the rear wheel 3 via a power transmission mechanism 12 (for example, an endless chain or belt). A front end portion of a swing arm 13 extending in the front-rear direction is pivotally supported on the vehicle body frame 4, and a rear end portion of the swing arm 13 pivotally supports the rear wheel 3.

後フレーム部６は、燃料タンク９の後側に配置されたメインシート１４と、メインシート１４の後側に配置されたサブシート１５（タンデムシート）とを支持する。サブシート１５は、メインシート１４とは別体であり、メインシート１４には運転者が着座し、サブシート１５には同乗者が着座する。後フレーム部６の後部は、後輪３を上方から覆う樹脂製のリヤフェンダ１６を下方から支持する。リヤフェンダ１６は、側面視で上方に凸な円弧形状を呈し、かつ、前後方向に直交する断面が上方に凸な円弧形状を呈する。リヤフェンダ１６は、側面視において後輪３の上端部を覆う。リヤフェンダ１６は、サブシート１５の下側かつ後フレーム部６の上側に配置される。 The rear frame portion 6 supports a main seat 14 disposed on the rear side of the fuel tank 9 and a sub-seat 15 (tandem seat) disposed on the rear side of the main seat 14. The sub seat 15 is separate from the main seat 14, and a driver is seated on the main seat 14, and a passenger is seated on the sub seat 15. The rear portion of the rear frame portion 6 supports a resin rear fender 16 that covers the rear wheel 3 from above. The rear fender 16 has an arc shape that protrudes upward in a side view, and also has an arc shape whose cross section perpendicular to the front-rear direction protrudes upward. The rear fender 16 covers the upper end portion of the rear wheel 3 in a side view. The rear fender 16 is disposed below the sub seat 15 and above the rear frame portion 6.

図２（Ａ）は、図１に示す自動二輪車１のサブシート１５及びその近傍の斜視図である。図２（Ｂ）は、図２（Ａ）に示す自動二輪車１のサブシート１５を取り外した状態における斜視図である。図２（Ｃ）は、図２（Ｂ）に示す自動二輪車１の分解斜視図である。図２（Ｄ）は、図２（Ｃ）に示す自動二輪車１のブラケット１７を取り外した状態における斜視図である。図２（Ａ）（Ｂ）に示すように、サブシート１５は、その前部がメインシート１４の後部に重なるようにしてリヤフェンダ１６の上側に配置される。サブシート１５の前部は、後述する被係合部３４を有するブラケット１７に着脱可能に係合され、サブシート１５の後部は、リヤフェンダ１６を介して車体フレーム４に着脱可能に固定される。ブラケット１７は、メインシート１４とは別体であり、リヤフェンダ１６の上側に配置される。ブラケット１７は、第１締結部材１８（例えば、ボルト）によりリヤフェンダ１６を通して車体フレーム４に着脱可能に締結される。サブシート１５の後部には、後方に突出するステー部１９が設けられ、ステー部１９は、第２締結部材２０（例えば、ボルト）によりリヤフェンダ１６を通して車体フレーム４に着脱可能に締結される。即ち、サブシート１５のステー部１９は、ブラケット１７から前後方向に離れた位置で車体フレーム４に固定される固定部である。 FIG. 2A is a perspective view of the sub-seat 15 and the vicinity of the motorcycle 1 shown in FIG. FIG. 2 (B) is a perspective view of the motorcycle 1 shown in FIG. 2 (A) with the sub seat 15 removed. FIG. 2 (C) is an exploded perspective view of the motorcycle 1 shown in FIG. 2 (B). FIG. 2 (D) is a perspective view of the motorcycle 1 shown in FIG. 2 (C) with the bracket 17 removed. As shown in FIGS. 2A and 2B, the sub-seat 15 is disposed on the upper side of the rear fender 16 so that the front portion thereof overlaps the rear portion of the main seat 14. The front portion of the sub seat 15 is detachably engaged with a bracket 17 having an engaged portion 34 described later, and the rear portion of the sub seat 15 is detachably fixed to the vehicle body frame 4 via the rear fender 16. The bracket 17 is separate from the main seat 14 and is disposed on the upper side of the rear fender 16. The bracket 17 is detachably fastened to the vehicle body frame 4 through the rear fender 16 by a first fastening member 18 (for example, a bolt). The rear portion of the sub-seat 15 is provided with a stay portion 19 that protrudes rearward. The stay portion 19 is detachably fastened to the vehicle body frame 4 through the rear fender 16 by a second fastening member 20 (for example, a bolt). That is, the stay portion 19 of the sub seat 15 is a fixed portion that is fixed to the vehicle body frame 4 at a position away from the bracket 17 in the front-rear direction.

メインシート１４とサブシート１５との両方が設けられた状態からメインシート１４のみが設けられた状態に変更するには、先ず、図２（Ａ）（Ｂ）に示すように、第２締結部材２０を取り外してからサブシート１５を後方に動かしてブラケット１７との係合を解除し、サブシート１５を取り外す。次いで、第２締結部材２０を再びリヤフェンダ１６を通して車体フレーム４に締結する。次いで、図２（Ｃ）に示すように、第１締結部材１８を取り外してブラケット１７を取り外す。ブラケット１７を取り外すと、第１締結部材１８によりブラケット１７とともに締結されていたメインシート１４のステー部２１が露出する。次いで、図２（Ｄ）に示すように、メインシート１４のステー部２１を第１締結部材１８によりリヤフェンダ１６を通して車体フレーム４に締結する。このようにして、メインシート１４とサブシート１５との両方が設けられた状態からメインシート１４のみが設けられた状態への変更が完了する。 In order to change from the state in which both the main seat 14 and the sub seat 15 are provided to the state in which only the main seat 14 is provided, first, as shown in FIGS. 2 (A) and 2 (B), the second fastening member After removing 20, the sub-sheet 15 is moved rearward to release the engagement with the bracket 17, and the sub-sheet 15 is removed. Next, the second fastening member 20 is fastened to the vehicle body frame 4 through the rear fender 16 again. Next, as shown in FIG. 2C, the first fastening member 18 is removed and the bracket 17 is removed. When the bracket 17 is removed, the stay portion 21 of the main seat 14 that is fastened together with the bracket 17 by the first fastening member 18 is exposed. Next, as shown in FIG. 2D, the stay portion 21 of the main seat 14 is fastened to the vehicle body frame 4 through the rear fender 16 by the first fastening member 18. In this way, the change from the state in which both the main seat 14 and the sub-seat 15 are provided to the state in which only the main seat 14 is provided is completed.

図３は、図２（Ｂ）に示す自動二輪車１の要部を示す平面図である。図４は、図３のIV−IV線断面図である。図５は、図３のV−V線断面図である。図３〜５に示すように、車体フレーム４の後フレーム部６には、左右方向に離隔して前後方向に延びる一対のレール部２２と、左右方向に延びて一対のレール部２２同士を連結する前クロス部２３及び後クロス部２４とを有する。前クロス部２３及び後クロス部２４は、前後方向から見て上方に凸な円弧状である。前クロス部２３と後クロス部２４とは、互いに前後方向に離隔しており、前クロス部２３と後クロス部２４との間に空隙Ｓ１が形成される。前クロス部２３には、後フレーム部６の車幅方向中心に位置する車体側支持部２５が１つのみ設けられ、後クロス部２４にも、後フレーム部６の車幅方向中心に位置する車体側支持部２６が１つのみ設けられる。前側の車体側支持部２５は、サブシート１５の前部に対応し、後側の車体側支持部２６は、サブシート１５の後部に対応する。 FIG. 3 is a plan view showing a main part of the motorcycle 1 shown in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. As shown in FIGS. 3 to 5, the rear frame portion 6 of the vehicle body frame 4 is connected to the pair of rail portions 22 that are separated in the left-right direction and extend in the front-rear direction, and the pair of rail portions 22 that extend in the left-right direction. A front cross portion 23 and a rear cross portion 24. The front cross part 23 and the rear cross part 24 have an arc shape that is convex upward when viewed from the front-rear direction. The front cross part 23 and the rear cross part 24 are separated from each other in the front-rear direction, and a gap S <b> 1 is formed between the front cross part 23 and the rear cross part 24. The front cross portion 23 is provided with only one vehicle body side support portion 25 positioned at the center of the rear frame portion 6 in the vehicle width direction, and the rear cross portion 24 is also positioned at the center of the rear frame portion 6 in the vehicle width direction. Only one vehicle body side support portion 26 is provided. The front vehicle body side support portion 25 corresponds to the front portion of the sub seat 15, and the rear vehicle body side support portion 26 corresponds to the rear portion of the sub seat 15.

前側の車体側支持部２５は、前クロス部２３の上面に固定された上方に凸なドーム部２５ａと、ドーム部２５ａの上面に固定されたナット部２５ｂとを有する。ナット部２５ｂは、円筒状であり、その内周面に雌ネジが刻設される。ナット部２５ｂには、円筒状のゴムダンパ２７が外嵌される。リヤフェンダ１６には、上方から見てナット部２５ｂを露出させる前開口部１６ａが形成される。ゴムダンパ２７は、リヤフェンダ１６の前開口部１６ａの周縁部を下方から弾性的に支持する。 The front vehicle body side support portion 25 has an upwardly protruding dome portion 25a fixed to the upper surface of the front cross portion 23, and a nut portion 25b fixed to the upper surface of the dome portion 25a. The nut portion 25b has a cylindrical shape, and a female screw is engraved on the inner peripheral surface thereof. A cylindrical rubber damper 27 is fitted on the nut portion 25b. The rear fender 16 is formed with a front opening 16a that exposes the nut portion 25b when viewed from above. The rubber damper 27 elastically supports the periphery of the front opening 16a of the rear fender 16 from below.

メインシート１４は、革製の表皮２８と、樹脂製の底板部材２９と、表皮２８と底板部材２９との間に配置されたウレタン製の弾性部材３０と、底板部材２９の後部に締結具３１（例えば、ボルト及びナット）で固定されて表皮２８及び底板部材２９よりも後方に突出した金属製のステー部２１とを有する。ステー部２１のうち底板部材２９よりも後方に突出した部分は、後方に向けて先細りとなる山形状の板部である（図２（Ｃ）参照）。ステー部２１には、締結用の孔２１ａが形成される。 The main sheet 14 includes a leather skin 28, a resin bottom plate member 29, a urethane elastic member 30 disposed between the skin 28 and the bottom plate member 29, and a fastener 31 at the rear of the bottom plate member 29. (For example, a bolt and a nut) and a metal stay portion 21 that protrudes rearward from the skin 28 and the bottom plate member 29. The portion of the stay portion 21 that protrudes rearward from the bottom plate member 29 is a mountain-shaped plate portion that tapers toward the rear (see FIG. 2C). The stay portion 21 is formed with a fastening hole 21a.

サブシート１５用のブラケット１７は、メインシート１４の後方で車体側支持部２５に固定するための車体固定部３２と、車体固定部３２の左右両端から斜め前上方に突出した一対の側壁部３３と、一対の側壁部３３の上端に固定されて車幅方向に延びる被係合部３４と、一対の側壁部３３から車幅方向外方にそれぞれ突出した一対の受け部３５とを備える。車体固定部３２には、締結用の孔３２ａが形成される。車体固定部３２は、メインシート１４のステー部２１に対して平面視で相対角変位不能に嵌合する嵌合部３２ｂを有する。嵌合部３２ｂは、車体固定部３２の下面を上方に窪ませて且つ前方に開放した凹部であり、メインシート１４のステー部２１の外形に沿った形状を有する。 The bracket 17 for the sub-seat 15 includes a vehicle body fixing portion 32 for fixing to the vehicle body side support portion 25 behind the main seat 14 and a pair of side wall portions 33 projecting obliquely forward and upward from the left and right ends of the vehicle body fixing portion 32. And an engaged portion 34 that is fixed to the upper ends of the pair of side wall portions 33 and extends in the vehicle width direction, and a pair of receiving portions 35 that respectively protrude outward from the pair of side wall portions 33 in the vehicle width direction. A fastening hole 32 a is formed in the vehicle body fixing portion 32. The vehicle body fixing portion 32 has a fitting portion 32b that is fitted to the stay portion 21 of the main seat 14 so that relative angular displacement is impossible in a plan view. The fitting portion 32 b is a concave portion that has a lower surface of the vehicle body fixing portion 32 that is depressed upward and opened forward, and has a shape that follows the outer shape of the stay portion 21 of the main seat 14.

一対の側壁部３３は、平面視で締結用の孔３２ａの左右両側に位置する。被係合部３４は、一対の側壁部３３の上端を車幅方向に連結するとともに、一対の側壁部３３よりも車幅方向外に延出している。被係合部３４は、パイプ形状である。被係合部３４は、車体固定部３２から上方に離れて配置され、サブシート１５の後述する係合部４２ｄに係合される。被係合部３４は、車体固定部３２よりも前方に位置する。メインシート１４は、下から上に向けて前方に傾斜した後端面１４ａを有し、ブラケット１７は、平面視でメインシート１４の後端面１４ａに重なる。即ち、被係合部３４は、メインシート１４の後端１４ｂよりも前方に位置する。但し、被係合部３４は、メインシート１４の後端面１４ａから後方に間隔をあけて配置される。受け部３５は、車体固定部３２よりも上方で且つ被係合部３４よりも下方に配置される。受け部３５は、サブシート１５を下方から支えるためのものである。 The pair of side wall portions 33 are located on both the left and right sides of the fastening hole 32a in plan view. The engaged portion 34 connects the upper ends of the pair of side wall portions 33 in the vehicle width direction, and extends more outward in the vehicle width direction than the pair of side wall portions 33. The engaged portion 34 has a pipe shape. The engaged portion 34 is disposed away from the vehicle body fixing portion 32 and is engaged with an engaging portion 42 d described later of the sub seat 15. The engaged portion 34 is located in front of the vehicle body fixing portion 32. The main seat 14 has a rear end surface 14a inclined forward from the bottom to the top, and the bracket 17 overlaps the rear end surface 14a of the main seat 14 in plan view. That is, the engaged portion 34 is positioned in front of the rear end 14b of the main seat 14. However, the engaged portion 34 is disposed rearwardly from the rear end surface 14a of the main seat 14. The receiving portion 35 is disposed above the vehicle body fixing portion 32 and below the engaged portion 34. The receiving portion 35 is for supporting the sub-sheet 15 from below.

ブラケット１７の嵌合部３２ｂがメインシート１４のステー部２１に上方から嵌合された状態で、ステー部２１の孔２１ａとブラケット１７の孔３２ａとを通して第１締結部材１８がナット部２５ｂに締結される。これにより、第１締結部材１８は、リヤフェンダ１６の前開口部１６ａを通してブラケット１７及びステー部２１を前側の車体側支持部２５に着脱可能に締結する。ステー部２１とリヤフェンダ１６との間には、ナット部２５ｂの上端部の外周側に位置する円環状のキャップ３７が挟まれる。キャップ３７は、リヤフェンダ１６よりも柔軟な樹脂からなる。即ち、第１締結部材１８は、ブラケット１７とステー部２１とリヤフェンダ１６とを後フレーム部６に共締めする。第１締結部材１８は、上方から見て被係合部３４と重ならない位置に配置される。具体的には、被係合部３４は、上方から見て、第１締結部材１８から距離Ｔをあけて前方に配置され、第１締結部材１８を露出させる。第１締結部材１８及び被係合部３４の両方が、リヤフェンダ１６の車幅方向中央に配置され、平面視で前後方向に延びる車体中心線Ｌ上に配置される。 The first fastening member 18 is fastened to the nut portion 25b through the hole 21a of the stay portion 21 and the hole 32a of the bracket 17 in a state where the fitting portion 32b of the bracket 17 is fitted to the stay portion 21 of the main seat 14 from above. Is done. Thus, the first fastening member 18 detachably fastens the bracket 17 and the stay portion 21 to the front vehicle body side support portion 25 through the front opening portion 16a of the rear fender 16. An annular cap 37 located on the outer peripheral side of the upper end portion of the nut portion 25 b is sandwiched between the stay portion 21 and the rear fender 16. The cap 37 is made of a resin that is more flexible than the rear fender 16. That is, the first fastening member 18 fastens the bracket 17, the stay part 21, and the rear fender 16 together with the rear frame part 6. The 1st fastening member 18 is arrange | positioned in the position which does not overlap with the to-be-engaged part 34 seeing from upper direction. Specifically, the engaged portion 34 is disposed forward from the first fastening member 18 at a distance T as seen from above, and exposes the first fastening member 18. Both the first fastening member 18 and the engaged portion 34 are arranged at the center in the vehicle width direction of the rear fender 16 and are arranged on the vehicle body center line L extending in the front-rear direction in plan view.

後側の車体側支持部２６は、後クロス部２４の上面に固定されたナット部２６ａを有する。ナット部２６ａは、円筒状であり、その内周面に雌ネジが刻設される。ナット部２６ａには、円筒状のゴムダンパ３８が外嵌される。リヤフェンダ１６には、上方から見てナット部２６ａを露出させる後開口部１６ｂが形成される。ゴムダンパ３８は、リヤフェンダ１６の後開口部１６ｂの周縁部を下方から弾性的に支持する。 The rear vehicle body side support portion 26 has a nut portion 26 a fixed to the upper surface of the rear cross portion 24. The nut portion 26a has a cylindrical shape, and a female screw is engraved on the inner peripheral surface thereof. A cylindrical rubber damper 38 is fitted on the nut portion 26a. The rear fender 16 is formed with a rear opening 16b that exposes the nut portion 26a when viewed from above. The rubber damper 38 elastically supports the periphery of the rear opening 16b of the rear fender 16 from below.

サブシート１５が取り外された状態においては、第２締結部材２０がワッシャ３９を介してナット部２６ａに締結される。ワッシャ３９とリヤフェンダ１６との間には、ナット部２６ａの上端部の外周側に位置する円環状のキャップ４０が挟まれる。キャップ４０は、リヤフェンダ１６よりも柔軟な樹脂からなる。これにより、第２締結部材２０は、リヤフェンダ１６の後開口部１６ｂを通して後側の車体側支持部２６に着脱可能に取り付けられる。 In the state where the sub-sheet 15 is removed, the second fastening member 20 is fastened to the nut portion 26 a via the washer 39. An annular cap 40 located between the washer 39 and the rear fender 16 is positioned on the outer peripheral side of the upper end portion of the nut portion 26a. The cap 40 is made of a resin that is more flexible than the rear fender 16. Thus, the second fastening member 20 is detachably attached to the rear vehicle body side support portion 26 through the rear opening 16b of the rear fender 16.

図６は、図２（Ａ）に示す自動二輪車１のサブシート１５を下方から見た分解斜視図である。図７は、図６に示すサブシート１５の補強部材本体部４６を上方から見た斜視図である。図６及び７に示すように、サブシート１５は、革製の表皮４１と、樹脂製の底板部材４２と、表皮４１と底板部材４２との間に配置されたウレタン製の弾性部材４３と、底板部材４２の下面に沿って延びて底板部材４２に固定された金属製の補強部材４４と、使用者が把持するための革製のベルト４５を備える。サブシート１５は、その前後方向寸法が車幅方向寸法よりも大きい。 FIG. 6 is an exploded perspective view of the sub seat 15 of the motorcycle 1 shown in FIG. FIG. 7 is a perspective view of the reinforcing member main body 46 of the sub-sheet 15 shown in FIG. 6 as viewed from above. As shown in FIGS. 6 and 7, the sub-sheet 15 includes a leather skin 41, a resin bottom plate member 42, a urethane elastic member 43 disposed between the skin 41 and the bottom plate member 42, and A metal reinforcing member 44 that extends along the lower surface of the bottom plate member 42 and is fixed to the bottom plate member 42, and a leather belt 45 that is gripped by the user. The sub seat 15 has a dimension in the front-rear direction larger than the dimension in the vehicle width direction.

表皮４１は、ステープラーで底板部材４２に固定される。底板部材４２は、上方に窪んだ断面形状を有する。底板部材４２は、サブシート１５の前部に対応して左右一対設けられた前側の補強部材固定部４２ａと、サブシート１５の後部に対応して左右一対設けられた後側の補強部材固定部４２ｂとを有する。前側の補強部材固定部４２ａは、ベルト４５を固定するためのベルト固定部も兼ねる。底板部材４２における前側の補強部材固定部４２ａと後側の補強部材固定部４２ｂとの間の中間部４２ｃには、複数の凹凸が形成される。底板部材４２は、前述したブラケット１７の被係合部３４に係合する係合部４２ｄを有する。係合部４２ｄは、前方に向けて突出した突起部であり、サブシート１５の前端よりも後方において底板部材４２の前部に設けられる。 The skin 41 is fixed to the bottom plate member 42 with a stapler. The bottom plate member 42 has a cross-sectional shape that is recessed upward. The bottom plate member 42 includes a pair of left and right front reinforcing member fixing portions 42 a corresponding to the front portion of the sub-sheet 15 and a pair of left and right rear reinforcing member fixing portions corresponding to the rear portion of the sub-sheet 15. 42b. The front reinforcing member fixing portion 42 a also serves as a belt fixing portion for fixing the belt 45. In the bottom plate member 42, a plurality of irregularities are formed in an intermediate portion 42c between the front reinforcing member fixing portion 42a and the rear reinforcing member fixing portion 42b. The bottom plate member 42 has an engaging portion 42d that engages with the engaged portion 34 of the bracket 17 described above. The engaging portion 42 d is a protruding portion that protrudes forward, and is provided at the front portion of the bottom plate member 42 behind the front end of the sub-sheet 15.

補強部材４４は、金属板をプレス加工してなる第１分割片４６及び第２分割片１９が互いに着脱可能に連結されてなる。第１分割片４６は、第２分割片１９よりも前後方向寸法及び車幅方向寸法が大きい。以下では、第１分割片４６は補強部材本体部４６と称し、第２分割片１９はステー部１９と称する。 The reinforcing member 44 is formed by detachably connecting a first divided piece 46 and a second divided piece 19 formed by pressing a metal plate. The first divided piece 46 has larger dimensions in the front-rear direction and the vehicle width direction than the second divided piece 19. Hereinafter, the first divided piece 46 is referred to as a reinforcing member main body 46, and the second divided piece 19 is referred to as a stay portion 19.

補強部材本体部４６は、前側の補強部材固定部４２ａに締結具４８（例えば、ボルト及びナット）で固定され、かつ、後側の補強部材固定部４２ｂに締結具４９（例えば、ボルト及びナット）で固定される。ベルト４５は、補強部材本体部４６とともに前側の補強部材固定部４２ａに締結具４８で共締めされる。ステー部１９は、後側の補強部材固定部４２ｂに固定され、かつ、サブシート１５の底板部材４２の後端よりも後方に突出して後フレーム部６の車体側支持部２６に固定される。補強部材本体部４６とステー部１９とは、互いに重ね合わされて後側の補強部材固定部４２ｂに締結具４９で共締めされる。補強部材４４は、複数の分割片４６，１９を互いに結合して形成することで、補強部材の製作単位の大型化が阻止され、スプリングバック等による寸法精度のバラつきが抑制される。 The reinforcing member main body 46 is fixed to the front reinforcing member fixing portion 42a with a fastener 48 (for example, bolts and nuts), and the fastener 49 (for example, bolts and nuts) to the rear reinforcing member fixing portion 42b. It is fixed with. The belt 45 is fastened together with the reinforcing member main body 46 to the front reinforcing member fixing portion 42 a by a fastener 48. The stay portion 19 is fixed to the rear reinforcing member fixing portion 42 b and protrudes rearward from the rear end of the bottom plate member 42 of the sub seat 15 and is fixed to the vehicle body side support portion 26 of the rear frame portion 6. The reinforcing member main body portion 46 and the stay portion 19 are overlapped with each other and fastened together with a fastener 49 to the rear reinforcing member fixing portion 42b. The reinforcing member 44 is formed by connecting a plurality of divided pieces 46 and 19 to each other, thereby preventing an increase in the production unit of the reinforcing member and suppressing variation in dimensional accuracy due to a springback or the like.

補強部材４４は、サブシート１５の前側から後側まで前後方向に延びる。補強部材４４は、その前後方向寸法が車幅方向寸法よりも大きい。補強部材４４は、底板部材４２よりも車幅方向寸法が小さい。前述した後フレーム部６の車体側支持部２５，２６（図５参照）がサブシート１５の車幅方向中心に配置されるので、補強部材４４の車幅方向寸法の大型化が防がれる。 The reinforcing member 44 extends in the front-rear direction from the front side to the rear side of the sub-seat 15. The reinforcing member 44 has a dimension in the front-rear direction larger than the dimension in the vehicle width direction. The reinforcing member 44 has a smaller dimension in the vehicle width direction than the bottom plate member 42. Since the vehicle body side support portions 25 and 26 (see FIG. 5) of the rear frame portion 6 described above are disposed at the center in the vehicle width direction of the sub seat 15, an increase in the size in the vehicle width direction of the reinforcing member 44 is prevented.

補強部材４４は、前側の車体側支持部２５と後側の車体側支持部２６との間において底板部材４２に下方から対向する中間部４４ａを有する。具体的には、補強部材本体部４６が、底板部材４２の中間部４２ｃに下方から対向して接触する。補強部材本体部４６の前端部の車幅方向中央には、後方に向けて切り欠かれた切欠部４６ｂが形成される。補強部材本体部４６の前端部には、切欠部４６ｂの車幅方向両側において上方に突出する一対の突起部４６ｃが設けられる。補強部材本体部４６の前端部の下面には、切欠部４６ｂの車幅方向両側においてゴムダンパ５０が取り付けられる。補強部材本体部４６は、その前後方向中心よりも前側において車幅方向に延びる段差部４６ｄを有する。補強部材本体部４６では、段差部４６ｄの前側部分が段差部４６ｄの後側部分よりも上方に位置する。 The reinforcing member 44 has an intermediate portion 44 a that faces the bottom plate member 42 from below between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26. Specifically, the reinforcing member main body 46 comes into contact with the intermediate portion 42c of the bottom plate member 42 so as to face from below. At the center in the vehicle width direction of the front end portion of the reinforcing member main body 46, a cutout portion 46b cut out rearward is formed. A pair of projecting portions 46 c projecting upward on both sides in the vehicle width direction of the notch portions 46 b are provided at the front end portion of the reinforcing member main body portion 46. Rubber dampers 50 are attached to the lower surface of the front end portion of the reinforcing member main body 46 on both sides of the notch 46b in the vehicle width direction. The reinforcing member main body 46 has a step 46d extending in the vehicle width direction on the front side of the center in the front-rear direction. In the reinforcing member main body 46, the front portion of the step portion 46d is positioned above the rear portion of the step portion 46d.

補強部材本体部４６には、前側の車体側支持部２５と後側の車体側支持部２６との間の領域に対応して前後方向に延びる複数のリブ４６ｅ，４６ｆが形成される。リブ４６ｅ，４６ｆは、プレス加工により下方に向けて突出するように形成される。リブ４６ｅは、補強部材本体部４６の車幅方向中央に形成され、段差部４６ｄから補強部材本体部４６の後端まで延在する。リブ４６ｆは、補強部材本体部４６の車幅方向両端部に形成され、段差部４６ｄから後方に延び、中央のリブ４６ｅよりも前後方向長さが小さい。 The reinforcing member main body 46 is formed with a plurality of ribs 46e and 46f extending in the front-rear direction corresponding to a region between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26. The ribs 46e and 46f are formed so as to protrude downward by pressing. The rib 46e is formed in the center of the reinforcing member main body 46 in the vehicle width direction, and extends from the stepped portion 46d to the rear end of the reinforcing member main body 46. The ribs 46f are formed at both ends in the vehicle width direction of the reinforcing member main body 46, extend rearward from the stepped portion 46d, and have a length in the front-rear direction smaller than the central rib 46e.

ステー部１９は、補強部材固定部４２ｂに締結される結合部１９ａと、結合部１９ａから斜め下後方に延びる中間部１９ｂと、中間部１９ｂから底板部材４２の後端よりも後方に突出し且つ締結用の孔１９ｄが形成された固定部１９ｃとを有する。ステー部１９の固定部１９ｃは、後方に向けて先細りとなる山型形状を有する（図２（Ａ）参照）。 The stay portion 19 includes a coupling portion 19a that is fastened to the reinforcing member fixing portion 42b, an intermediate portion 19b that extends obliquely downward and rearward from the coupling portion 19a, and protrudes rearward from the intermediate portion 19b to the rear end of the bottom plate member 42 and is fastened. And a fixing portion 19c in which a hole 19d is formed. The fixing portion 19c of the stay portion 19 has a mountain shape that tapers toward the rear (see FIG. 2A).

図８は、図２（Ａ）に示す自動二輪車１の要部を左斜め前方から見て一部断面化した斜視図である。図９は、図２（Ａ）に示す自動二輪車１の要部を示す平面図である。図１０は、図９のX−X線断面図である。図１１は、図９のXI−XI線断面図である。図１２は、図９のXII−XII線断面図である。図８〜１２に示すように、本実施形態のシート構造においてサブシート１５が取り付けられた状態では、サブシート１５の前端部がメインシート１４の前傾した後端面１４ａに上方から重ねられる。サブシート１５の係合部４２ｄは、ブラケット１７の被係合部３４に係合され、サブシート１５のステー部１９が後側の車体側支持部２６に第２締結部材２０で締結される。 FIG. 8 is a perspective view in which the main part of the motorcycle 1 shown in FIG. FIG. 9 is a plan view showing a main part of the motorcycle 1 shown in FIG. 10 is a cross-sectional view taken along the line XX of FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. As shown in FIGS. 8 to 12, in the state where the sub-sheet 15 is attached in the seat structure of the present embodiment, the front end portion of the sub-sheet 15 is superimposed on the rear end surface 14 a of the main seat 14 that is inclined forward from above. The engaging portion 42 d of the sub seat 15 is engaged with the engaged portion 34 of the bracket 17, and the stay portion 19 of the sub seat 15 is fastened to the rear body side support portion 26 by the second fastening member 20.

具体的には、ブラケット１７が補強部材本体部４６の切欠部４６ｂ内に配置されるように、サブシート１５の係合部４２ｄが、ブラケット１７の被係合部３４の下側かつ一対の側壁部３３の間の空間に後方から挿入される。係合部４２ｄが被係合部３４に干渉することで、サブシート１５の上方移動が規制され、かつ、係合部４２ｄが側壁部３３に干渉することで、サブシート１５の左右方向の移動が規制される。また、補強部材４４の突起部４６ｃは、一対の側壁部３３の車幅方向外側において被係合部３４に下方から対向する。即ち、ベルト４５が引っ張られてサブシート１５が上方に移動しようとしたときに、補強部材４４の突起部４６ｃも被係合部３４に干渉することで、サブシート１５の上方移動が安定的に規制される。ブラケット１７の被係合部３４は、サブシート１５の底板部材４２の下面に対向するため、底板部材４２を下方から支持する機能も有する。サブシート１５の補強部材本体部４６の前端部は、その下面に取り付けられたゴムダンパ５０を介してブラケット１７の受け部３５に上方から載置される。 Specifically, the engaging portion 42d of the sub-sheet 15 is provided below the engaged portion 34 of the bracket 17 and a pair of side walls so that the bracket 17 is disposed in the notch 46b of the reinforcing member main body 46. It is inserted into the space between the parts 33 from the rear. When the engaging portion 42d interferes with the engaged portion 34, the upward movement of the sub-sheet 15 is restricted, and when the engaging portion 42d interferes with the side wall portion 33, the sub-sheet 15 moves in the left-right direction. Is regulated. Further, the protrusion 46 c of the reinforcing member 44 faces the engaged portion 34 from below on the outer side in the vehicle width direction of the pair of side wall portions 33. That is, when the belt 45 is pulled and the sub-sheet 15 is about to move upward, the protrusion 46c of the reinforcing member 44 also interferes with the engaged portion 34, so that the upward movement of the sub-sheet 15 is stably performed. Be regulated. Since the engaged portion 34 of the bracket 17 faces the lower surface of the bottom plate member 42 of the sub sheet 15, it also has a function of supporting the bottom plate member 42 from below. The front end portion of the reinforcing member main body 46 of the sub-sheet 15 is placed on the receiving portion 35 of the bracket 17 from above via a rubber damper 50 attached to the lower surface thereof.

また、サブシート１５のステー部１９の固定部１９ｃの孔１９ｄを通して、第２締結部材２０がナット部２６ａに締結される。これにより、第２締結部材２０は、リヤフェンダ１６の後開口部１６ｂを通してステー部１９及びリヤフェンダ１６を後側の車体側支持部２６に着脱可能に共締めする。この締結作業の際、係合部４２ｄがブラケット１７の側壁部３３に干渉することで、サブシート１５が第２締結部材２０周りに角変位することが防止される。 Further, the second fastening member 20 is fastened to the nut portion 26a through the hole 19d of the fixing portion 19c of the stay portion 19 of the sub seat 15. Thus, the second fastening member 20 detachably fastens the stay portion 19 and the rear fender 16 to the rear vehicle body side support portion 26 through the rear opening portion 16b of the rear fender 16. During the fastening operation, the engaging portion 42d interferes with the side wall portion 33 of the bracket 17 to prevent the sub-sheet 15 from being angularly displaced around the second fastening member 20.

リヤフェンダ１６は、補強部材４４に下方から対向し、かつ、後フレーム部６に上方から対向する。補強部材４４は、前側の車体側支持部２５と後側の車体側支持部２６との間にわたって延在する。補強部材本体部４６は、その下方のリヤフェンダ１６に対して鉛直方向に隙間をあけて配置される。即ち、補強部材４４のうち前側の車体側支持部２５と後側の車体側支持部２６との間に位置する中間部４４ａは、リヤフェンダ１６と隙間をあけて配置され、リヤフェンダ１６には支持されていない。前側の車体側支持部２５と後側の車体側支持部２６との間の領域では、後フレーム部６はリヤフェンダ１６を支持していない。補強部材４４の中間部４４ａは、後フレーム部６の前クロス部２３と後クロス部２４の間の空隙Ｓ１の上方に位置する。サブシート１５の左右両側の下端部は、リヤフェンダ１６の上面に対して隙間をあけている。 The rear fender 16 faces the reinforcing member 44 from below and faces the rear frame portion 6 from above. The reinforcing member 44 extends between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26. The reinforcing member main body 46 is disposed with a gap in the vertical direction with respect to the rear fender 16 below the reinforcing member main body 46. That is, an intermediate portion 44 a located between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26 of the reinforcing member 44 is disposed with a gap from the rear fender 16 and is supported by the rear fender 16. Not. In the region between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26, the rear frame portion 6 does not support the rear fender 16. The intermediate portion 44 a of the reinforcing member 44 is located above the gap S <b> 1 between the front cross portion 23 and the rear cross portion 24 of the rear frame portion 6. The lower ends of the left and right sides of the sub-seat 15 are spaced from the upper surface of the rear fender 16.

以上に説明した構成によれば、サブシート１５用のブラケット１７が第１締結部材１８により車体フレーム４に着脱可能に固定されるので、サブシート１５を設置しない場合には、メインシート１４とは別体のサブシート１５をブラケット１７から取り外して且つブラケット１７を車体フレーム４から取り外せば、ブラケット１７がリヤフェンダの上側の領域に残存することがない。よって、サブシート１５を取り外してリヤフェンダ１６の上面が露出することになっても、美観が良好に保たれる。そして、サブシート１５用のブラケット１７を取り外した状態でも、第１締結部材１８がメインシート１４のステー部２１を締結する機能を果たすので、サブシート１５を設置しない場合でも、第１締結部材１８の締結対象部分を不所望に露出させずに済み、かつ、ブラケット１７を車体フレーム４に締結するための専用の開口をリヤフェンダ１６に形成せずに済む。したがって、運転者用シートと同乗者用シートとの両方が設けられる仕様と、同乗者用シートがなくて運転者用シートのみが設けられる仕様とを、外観を損なうことなく共通の車両で実現することができる。 According to the configuration described above, since the bracket 17 for the sub seat 15 is detachably fixed to the vehicle body frame 4 by the first fastening member 18, when the sub seat 15 is not installed, If the separate sub-seat 15 is removed from the bracket 17 and the bracket 17 is removed from the vehicle body frame 4, the bracket 17 does not remain in the upper region of the rear fender. Therefore, even if the sub-sheet 15 is removed and the upper surface of the rear fender 16 is exposed, the aesthetic appearance is kept good. Even when the bracket 17 for the sub seat 15 is removed, the first fastening member 18 functions to fasten the stay portion 21 of the main seat 14. Therefore, even when the sub seat 15 is not installed, the first fastening member 18 is used. It is not necessary to undesirably expose the fastening target portion, and it is not necessary to form a dedicated opening in the rear fender 16 for fastening the bracket 17 to the vehicle body frame 4. Therefore, a specification in which both a driver's seat and a passenger's seat are provided, and a specification in which only the driver's seat is provided without a passenger's seat are realized in a common vehicle without impairing the appearance. be able to.

また、第１締結部材１８は、ブラケット１７及びリヤフェンダ１６を車体フレーム４に共締めし、第２締結部材２０は、ステー部１９及びリヤフェンダ１６を車体フレーム４に共締めするので、リヤフェンダ１６の固定部分がブラケット１７の固定部分及びサブシート１５の固定部分と共通化され、美観を向上することができる。また、ステー部２１にブラケット１７が載置されることで、ブラケット１７がリヤフェンダ１６に接触することが防がれ、ブラケット１７によりリヤフェンダ１６が傷付くことが防止できる。また、ステー部２１及び第１締結部材１８は、リヤフェンダ１６の車幅方向中心に配置されるため、前後方向に垂直な切断面におけるリヤフェンダ１６の最上部に配置されることになる。これにより、第１締結部材１８から見てブラケット１７を水平方向に延出させても、ブラケット１７とリヤフェンダ１６との接触を防止できる。また、ブラケット１７の受け部３５は、車体固定部３２よりも上方に配置されるので、受け部３５とリヤフェンダ１６との接触が好適に防がれ、当該接触によりリヤフェンダ１６の上面が傷付くことを防止できる。 The first fastening member 18 fastens the bracket 17 and the rear fender 16 together with the vehicle body frame 4, and the second fastening member 20 fastens the stay portion 19 and the rear fender 16 together with the vehicle body frame 4. The portion is made common with the fixing portion of the bracket 17 and the fixing portion of the sub-seat 15, and the aesthetic appearance can be improved. In addition, by placing the bracket 17 on the stay portion 21, the bracket 17 can be prevented from coming into contact with the rear fender 16, and the rear fender 16 can be prevented from being damaged by the bracket 17. Further, since the stay portion 21 and the first fastening member 18 are disposed at the center of the rear fender 16 in the vehicle width direction, the stay portion 21 and the first fastening member 18 are disposed at the uppermost portion of the rear fender 16 on the cut surface perpendicular to the front-rear direction. Thereby, even if the bracket 17 is extended in the horizontal direction when viewed from the first fastening member 18, the contact between the bracket 17 and the rear fender 16 can be prevented. Further, since the receiving portion 35 of the bracket 17 is disposed above the vehicle body fixing portion 32, the contact between the receiving portion 35 and the rear fender 16 is preferably prevented, and the upper surface of the rear fender 16 is damaged by the contact. Can be prevented.

また、ブラケット１７は、ステー部２１に対して相対角変位不能に嵌合する嵌合部３２ｂを有するので、第１締結部材１８でブラケット１７を締結する際に、複雑な回り止め機構を設けずともブラケット１７が回転するのを簡易に防止できる。即ち、ブラケット１７の回り止め部（嵌合部３２ｂ）は、ステー部２１に対応して上方に窪んだ凹所が形成され、ステー部２１と回り止め部が嵌合することで回り止めできる。また、ブラケット１７の嵌合部３２ｂとステー部２１とが嵌合した状態で、ブラケット１７のステー部２１に対する前方向及び横方向への相対移動が阻止されるので、第１締結部材１８による共締め作業が行いやすくなる。具体的には、ステー部２１が後方に進むにつれて先細り形状に形成されることで、それに嵌合したブラケット１７の前方向及び横方向の移動を阻止できる。 Further, since the bracket 17 has the fitting portion 32b that is fitted to the stay portion 21 so as not to be relatively angularly displaced, when the bracket 17 is fastened by the first fastening member 18, a complicated detent mechanism is not provided. In both cases, it is possible to easily prevent the bracket 17 from rotating. In other words, the rotation preventing portion (fitting portion 32b) of the bracket 17 is formed with a recess recessed upward corresponding to the stay portion 21, and can be prevented by fitting the stay portion 21 and the rotation preventing portion. Further, since the relative movement in the forward direction and the lateral direction of the bracket 17 with respect to the stay portion 21 is prevented in a state in which the fitting portion 32b of the bracket 17 and the stay portion 21 are fitted, the joint by the first fastening member 18 is prevented. Tightening work becomes easier. Specifically, the stay portion 21 is formed in a tapered shape as it moves backward, so that the forward and lateral movement of the bracket 17 fitted thereto can be prevented.

また、ブラケット１７の被係合部３４は、車体固定部３２よりも前方に位置するので、サブシート１５の前端部がメインシート１４の後端部に上方から重なるように容易に配置できる。また、サブシート１５の前端部とメインシート１４の後端部とが、前後方向及び上下方向に重なって配置されることで、シート１４，１５同士に一体感を与えることができ、美観が向上する。また、被係合部３４が第１締結部材１８よりも前方に配置されることで、サブシート１５に設けられる把持用のベルト４５をなるべく前方に配置することができ、サブシート１５の大型化を防止できる。また、サブシート１５のうちメインシート１４の後端部に上方から重なる部分にベルト４５を配置することで、サブシート１５の後端部をメインシート１４側に近づけることができ、車体中心に重心を近づけることができる。また、サブシート１５のうち同乗者の着座部分に配置される弾性材料４３（例えば、ウレタン材）の上下寸法を大きくすることができる。 Further, since the engaged portion 34 of the bracket 17 is positioned in front of the vehicle body fixing portion 32, it can be easily arranged such that the front end portion of the sub seat 15 overlaps the rear end portion of the main seat 14 from above. Further, the front end portion of the sub-seat 15 and the rear end portion of the main seat 14 are disposed so as to overlap in the front-rear direction and the vertical direction, so that a sense of unity can be given to the seats 14 and 15 and the aesthetic appearance is improved. To do. Further, since the engaged portion 34 is disposed in front of the first fastening member 18, the gripping belt 45 provided in the sub seat 15 can be disposed as far as possible, and the sub seat 15 can be enlarged. Can be prevented. Further, by arranging the belt 45 in a portion of the sub seat 15 that overlaps the rear end portion of the main seat 14 from above, the rear end portion of the sub seat 15 can be brought closer to the main seat 14 side, and the center of gravity is centered on the vehicle body. Can be brought closer. Moreover, the vertical dimension of the elastic material 43 (for example, urethane material) arrange | positioned in the passenger's seating part among the sub seats 15 can be enlarged.

更に、サブシート１５は、樹脂製の底板部材４２の下面に沿って延びて底板部材４２に固定される補強部材４４を備えるので、補強部材４４が底板部材４２に負荷される荷重を支え、サブシート１５に負荷される荷重を支えるための車体側に形成すべき支持箇所を低減できる。また、補強部材４４は、前側の車体側支持部２５と後側の車体側支持部２６との間にわたって延在するので、底板部材４２からの荷重が補強部材４４を介して後フレーム部６に伝達されるため、補強部材４４の撓みを抑制できる。 Further, since the sub-sheet 15 includes the reinforcing member 44 that extends along the lower surface of the resin-made bottom plate member 42 and is fixed to the bottom plate member 42, the reinforcing member 44 supports the load applied to the bottom plate member 42, The support location which should be formed in the vehicle body side for supporting the load loaded on the sheet | seat 15 can be reduced. Further, since the reinforcing member 44 extends between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26, the load from the bottom plate member 42 is applied to the rear frame portion 6 via the reinforcement member 44. Since it is transmitted, the bending of the reinforcing member 44 can be suppressed.

また、補強部材４４の中間部４４ａは、その下方のリヤフェンダ１６に対して鉛直方向に隙間をあけて配置されるので、補強部材４４の中間部４４ａが多少撓んだとしても、リヤフェンダ１６に補強部材４４が押し当てられることが防止できる。そのため、サブシート１５からの荷重によりリヤフェンダ１６が変形するのを防ぐためにだけに、後フレーム部６がリヤフェンダ１６を支持する必要はなくなる。よって、後フレーム部６には、補強部材４４の中間部４４ａの直下の領域に空隙Ｓ１を形成することが可能となり、車体軽量化に貢献する。また、補強部材４４の中間部４４ａがリヤフェンダ１６に押し当てられることが防止されるため、リヤフェンダ１６を金属でなく樹脂することが可能となり、車体軽量化を更に図ることでき、かつ、リヤフェンダ１６の上面の美観も良好にできる。 Further, since the intermediate portion 44a of the reinforcing member 44 is disposed with a gap in the vertical direction with respect to the rear fender 16 below the reinforcing member 44, even if the intermediate portion 44a of the reinforcing member 44 is slightly bent, it is reinforced to the rear fender 16. It is possible to prevent the member 44 from being pressed. Therefore, the rear frame portion 6 does not need to support the rear fender 16 only to prevent the rear fender 16 from being deformed by the load from the sub-seat 15. Therefore, it is possible to form the gap S1 in the region immediately below the intermediate portion 44a of the reinforcing member 44 in the rear frame portion 6, which contributes to the weight reduction of the vehicle body. Further, since the intermediate portion 44a of the reinforcing member 44 is prevented from being pressed against the rear fender 16, the rear fender 16 can be made of resin instead of metal, the vehicle weight can be further reduced, and the rear fender 16 can be reduced. The aesthetics of the top surface can be improved.

また、補強部材４４のうち前側の車体側支持部２５と後側の車体側支持部２６との間の領域は、リヤフェンダ１６と隙間をあけてリヤフェンダ１６との間にスペーサ（例えば、ゴムダンパ）が介設されないため、スペーサの跡がリヤフェンダ１６の上面に残ることがなく、リヤフェンダ１６の上面の美観を更に良好にできる。また、補強部材４４により底板部材４２の撓み変形が抑止されるため、サブシート１５の左右両側の下端部がリヤフェンダ１６の上面に擦れることも防止でき、リヤフェンダ１６の上面の美観を更に良好にできる。 Further, in the reinforcing member 44, a region between the front vehicle body side support portion 25 and the rear vehicle body side support portion 26 has a spacer (for example, a rubber damper) between the rear fender 16 and a gap between the rear fender 16 and the rear fender 16. Since it is not interposed, the trace of the spacer does not remain on the upper surface of the rear fender 16, and the aesthetic appearance of the upper surface of the rear fender 16 can be further improved. Further, since the bending deformation of the bottom plate member 42 is suppressed by the reinforcing member 44, it is possible to prevent the lower end portions of the left and right sides of the sub-sheet 15 from rubbing against the upper surface of the rear fender 16, and to further improve the appearance of the upper surface of the rear fender 16. .

また、補強部材４４には、前後方向に延びるリブ４６ｅ，４６ｆが形成されるので、補強部材４４の剛性が向上し、補強部材４４の撓みを抑制できる。また、補強部材本体部４６とステー部１９とを互いに連結するにあたり、補強部材４４を底板部材４２に固定するための補強部材固定部４２ａを共用するので、構造を簡素化することができる。また、補強部材４４は、ベルト４５とともに底板部材４２に共締めされるので、ベルト４５を固定するための部分と補強部材４４を固定するための部分とを共通化でき、固定部を低減できる。 Further, since the ribs 46e and 46f extending in the front-rear direction are formed on the reinforcing member 44, the rigidity of the reinforcing member 44 is improved and the bending of the reinforcing member 44 can be suppressed. Further, since the reinforcing member fixing portion 42a for fixing the reinforcing member 44 to the bottom plate member 42 is shared when the reinforcing member main body portion 46 and the stay portion 19 are connected to each other, the structure can be simplified. Further, since the reinforcing member 44 is fastened together with the belt 45 together with the bottom plate member 42, a portion for fixing the belt 45 and a portion for fixing the reinforcing member 44 can be made common, and the fixing portion can be reduced.

なお、本発明は前述した実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲でその構成を変更、追加、又は削除することができる。前記実施形態では、鞍乗型車両として自動二輪車を例示したが、使用者がシートに跨って着座する車両であれば他の車両（例えば、ＡＴＶ等）でもよい。前記実施形態では、原動機として内燃機関のエンジンが用いられているが、電気モータが用いられてもよい。本実施形態の構成は、アメリカンタイプの自動二輪車に好適に適用できるが、レーサータイプ又はネイキッドタイプなどに適用してもよい。 The present invention is not limited to the above-described embodiment, and the configuration can be changed, added, or deleted without departing from the spirit of the present invention. In the above-described embodiment, the motorcycle is exemplified as the saddle riding type vehicle. However, other vehicles (for example, ATV or the like) may be used as long as the user sits across the seat. In the embodiment, the engine of the internal combustion engine is used as the prime mover, but an electric motor may be used. The configuration of the present embodiment can be suitably applied to an American type motorcycle, but may be applied to a racer type or a naked type.

１自動二輪車（鞍乗型車両）
４車体フレーム
１４メインシート
１５サブシート
１６リヤフェンダ
１７ブラケット
１８第１締結部材
１９ステー部（第２分割片）
１９ｃ固定部
２０第２締結部材
２１ステー部
２２レール部
２３前クロス部
２４後クロス部
２５，２６車体側支持部
３２車体固定部
３２ｂ嵌合部
３３側壁部
３４被係合部
３５受け部
４１表皮
４２底板部材
４２ａ補強部材固定部
４２ｂ補強部材固定部
４２ｄ係合部
４３弾性部材
４４補強部材
４５ベルト
４６補強部材本体部（第１分割片）
４６ｅ，４６ｆリブ
Ｓ１空隙
1 Motorcycle (saddle-ride type vehicle)
4 Body frame 14 Main seat 15 Sub seat 16 Rear fender 17 Bracket 18 First fastening member 19 Stay portion (second divided piece)
19c fixing part 20 second fastening member 21 stay part 22 rail part 23 front cross part 24 rear cross part 25, 26 vehicle body side support part 32 vehicle body fixing part 32b fitting part 33 side wall part 34 engaged part 35 receiving part 41 skin 42 bottom plate member 42a reinforcing member fixing portion 42b reinforcing member fixing portion 42d engaging portion 43 elastic member 44 reinforcing member 45 belt 46 reinforcing member main body portion (first divided piece)
46e, 46f rib S1 gap

Claims

Body frame,
A main seat for the driver to sit on;
A sub-seat that is separate from the main seat and is disposed on the rear side of the main seat, for a passenger to sit on;
A bracket separate from the main seat, to which the sub-seat is attached;
A first fastening member for detachably fastening the bracket to the body frame,
The main seat has a stay portion protruding rearward,
The sub-sheet has an engaging portion that engages with the bracket;
The bracket is disposed rearward of the main seat and fixed to the vehicle body frame, spaced apart upward from the vehicle body fixing portion, and is engaged with the engagement portion of the sub seat so that the sub seat And an engaged portion for preventing upward movement of the
The straddle-type vehicle, wherein the first fastening member fastens the stay portion and the bracket together with the body frame.

Body frame,
A main seat for the driver to sit on;
A sub-seat that is separate from the main seat and is disposed on the rear side of the main seat, for a passenger to sit on;
A bracket separate from the main seat, to which the sub-seat is attached;
A first fastening member for detachably fastening the bracket to the body frame,
The main seat has a stay portion protruding rearward,
The first fastening member fastens the stay portion and the bracket to the body frame,
The straddle-type vehicle according to claim 1, wherein the bracket has a fitting portion that is fitted to the stay portion so that relative angular displacement is impossible.

A rear fender disposed below the sub-seat and above the vehicle body frame;
The bracket is disposed above the rear fender,
The straddle-type vehicle according to claim 1 or 2, wherein the first fastening member detachably fastens the bracket to the vehicle body frame through the rear fender.

The straddle-type vehicle according to claim 3, wherein the first fastening member fastens the bracket and the rear fender together with the body frame.

A second fastening member for detachably fastening the sub-seat to the body frame;
The sub-seat has a fixing portion that is fixed to the vehicle body frame at a position away from the bracket,
The straddle-type vehicle according to claim 3 or 4, wherein the second fastening member fastens the fixing portion and the rear fender together with the vehicle body frame.

The sub-sheet has an engaging portion that engages with the bracket;
The bracket is disposed rearward of the main seat and fixed to the vehicle body frame, spaced apart upward from the vehicle body fixing portion, and is engaged with the engagement portion of the sub seat so that the sub seat And an engaged portion for preventing upward movement of the
The straddle-type vehicle according to any one of claims 1 to 5, wherein the engaged portion is positioned in front of the vehicle body fixing portion.

Body frame,
A main seat for the driver to sit on;
A sub-seat that is separate from the main seat and is disposed on the rear side of the main seat, for a passenger to sit on;
A bracket separate from the main seat, to which the sub-seat is attached;
A first fastening member for detachably fastening the bracket to the body frame,
The main seat has a stay portion protruding rearward,
The first fastening member fastens the stay portion and the bracket to the body frame,
The bracket includes a vehicle body fixing portion fixed to the vehicle body frame behind the main seat, and a receiving portion for supporting the sub seat from below.
The straddle-type vehicle, wherein the receiving portion is disposed above the vehicle body fixing portion.