JP2013159171A - Method of manufacturing bicycle frame and bicycle frame - Google Patents

Method of manufacturing bicycle frame and bicycle frame Download PDF

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JP2013159171A
JP2013159171A JP2012020832A JP2012020832A JP2013159171A JP 2013159171 A JP2013159171 A JP 2013159171A JP 2012020832 A JP2012020832 A JP 2012020832A JP 2012020832 A JP2012020832 A JP 2012020832A JP 2013159171 A JP2013159171 A JP 2013159171A
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bicycle frame
welding
section
pipe
vibration
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JP5991820B2 (en
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Mitsunobu Kono
光伸 河野
Hiroshi Todoroki
寛 轟
Akira Isoda
亮 磯田
Nobutoshi Kasuga
信敏 春日
Masumi Kawabata
真澄 川端
Takahide Nomura
敬英 能村
Munenori Iizuka
宗紀 飯塚
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Bridgestone Cycle Co Ltd
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Bridgestone Cycle Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a bicycle frame capable of suppressing deformation in the vicinity of a welding surface when joining a resin halved bicycle frame member by vibration welding, and the bicycle frame.SOLUTION: A bicycle frame includes halved head pipes 12 and 22, halved seat pipes 14 and 24, and a pair of right and left halved bicycle frame members 10 and 20 which are made of resin and include upper side halved connection members 16 and 26 and lower side halved connection members 18 and 28 for connecting the halved head pipes and the halved seat pipes. Respective welding surfaces of the bicycle frame members 10 and 20 are joined by vibration welding, and the vibration direction thereof is set in the direction along axial direction of the halved seat pipes 14 and 24. On the lower side of the inside surface of the halved connection members 18 and 28, a rib 30 is formed for suppressing fall deformation in the vicinity of the welding surfaces 18B and 28B in a circumferential direction.

Description

本発明は、自転車フレームの製造方法及び自転車フレームに関する。   The present invention relates to a method for manufacturing a bicycle frame and a bicycle frame.

下記特許文献１には、自転車の閉断面のフレームの製造方法として、２つの開断面の半フレーム体を接着、溶接、或いはねじによる締結、または超音波などの結合方式で接合し、閉断面のフレームとする技術が開示されている。   In Patent Document 1 below, as a method of manufacturing a frame having a closed cross section of a bicycle, two half-frame bodies having an open cross section are bonded, welded, fastened by screws, or joined by a coupling method such as ultrasonic waves, A technique for making a frame is disclosed.

登録実用新案第３００４８２８号公報Registered Utility Model No. 3004828

しかし、上記特許文献１に記載の構成では、例えば、２つの開断面の半フレーム体を樹脂で形成し、２つの半フレーム体の溶着面を接合して閉断面のフレームとする場合、溶着方式によっては、溶着面付近の強度が不十分となる恐れがある。   However, in the configuration described in Patent Document 1, for example, when two open half-frame bodies are formed of resin and the welding surfaces of the two half-frame bodies are joined to form a closed cross-section frame, a welding method is used. In some cases, the strength in the vicinity of the weld surface may be insufficient.

本発明は、上記問題点に鑑みてなされたものであり、振動溶着により樹脂製の半割り自転車フレーム部材を接合する際に、溶着面付近の変形を抑制することができる自転車フレームの製造方法及び自転車フレームを提供することを目的とする。   The present invention has been made in view of the above problems, and a bicycle frame manufacturing method capable of suppressing deformation in the vicinity of the weld surface when joining a resin-made half bicycle frame member by vibration welding and An object is to provide a bicycle frame.

上記課題を解決するために、請求項１に記載の発明に係る自転車フレームの製造方法は、ハンドルが装着される開断面の半割りヘッドパイプ及びサドルのシートポストが装着される開断面の半割りシートパイプの少なくとも一方と、前記半割りヘッドパイプ及び前記半割りシートパイプの少なくとも一方に連結される開断面の半割り連結部材と、が一体成形された開断面の半割り自転車フレーム部材を２つ重ね合わせて振動溶着により接合して閉断面の自転車フレームとするときに、前記振動溶着による振動方向を前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向とすると共に、前記振動方向と交差する方向に軸方向が配置された前記半割り連結部材の内側面の少なくとも一部に、前記半割り連結部材の周方向に沿ってリブが形成されている。   In order to solve the above-mentioned problem, a manufacturing method of a bicycle frame according to claim 1 includes a half-cut head pipe having an open cross section to which a handle is attached and a half cut having an open cross section to which a seat post of a saddle is attached. Two half-cut bicycle frame members having an open cross section integrally formed with at least one of a seat pipe and an open cross-section half connecting member connected to at least one of the half head pipe and the half seat pipe When overlapping and joining by vibration welding to form a bicycle frame having a closed cross section, the vibration direction by the vibration welding is a direction along the axial direction of the half head pipe or the half seat pipe, and the vibration At least a part of the inner surface of the half connecting member, the axial direction of which is arranged in a direction crossing the direction, along the circumferential direction of the half connecting member. It is formed rib Te.

請求項１に記載の発明では、開断面の半割りヘッドパイプ及び開断面の半割りシートパイプの少なくとも一方と、半割りヘッドパイプ及び前記半割りシートパイプの少なくとも一方に連結される開断面の半割り連結部材と、が一体成形された開断面の半割り自転車フレーム部材を２つ重ね合わせると共に、半割りヘッドパイプ又は半割りシートパイプの軸方向に沿った方向を振動方向として振動溶着により接合して閉断面の自転車フレームを製造する。その際、振動方向と交差する方向に軸方向が配置された半割り連結部材の内側面の少なくとも一部に、該半割り連結部材の周方向に沿ってリブが形成されており、振動溶着により半割り連結部材の溶着面を接合する際に、リブにより溶着面付近の倒れ変形を抑制することができる。   According to the first aspect of the present invention, at least one of the half-head pipe with the open cross section and the half-seat pipe with the open cross-section, and the half with the open cross-section connected to at least one of the half head pipe and the half seat pipe are provided. Two split frame members with an open cross section integrally formed with the split connecting member are overlapped and joined by vibration welding with the direction along the axial direction of the half head pipe or half seat pipe as the vibration direction. To produce a bicycle frame with a closed cross section. At this time, ribs are formed along at least a part of the inner side surface of the half connecting member in which the axial direction is arranged in a direction crossing the vibration direction, along the circumferential direction of the half connecting member. When joining the welding surfaces of the half connecting members, the ribs can be prevented from being collapsed near the welding surface.

請求項２に記載の発明は、請求項１に記載の自転車フレームの製造方法において、前記半割り連結部材の内側面には、前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向の少なくとも両側に前記リブがそれぞれ形成されている。   According to a second aspect of the present invention, in the method for manufacturing a bicycle frame according to the first aspect, an inner side surface of the half connection member extends along an axial direction of the half head pipe or the half seat pipe. The ribs are respectively formed on at least both sides in the direction.

請求項２に記載の発明では、半割り連結部材の内側面には、半割りヘッドパイプ又は半割りシートパイプの軸方向に沿った方向の少なくとも両側にリブがそれぞれ形成されており、振動溶着により半割り連結部材の溶着面を接合する際に、リブにより半割り連結部材の両側の溶着面付近の倒れ変形をより効果的に抑制することができる。   In the invention according to claim 2, ribs are formed on at least both sides in the direction along the axial direction of the half head pipe or the half seat pipe on the inner side surface of the half connecting member, and vibration welding is used. When joining the welding surfaces of the half-split connecting members, the ribs can be more effectively suppressed from falling down near the weld surfaces on both sides of the half-split connecting members.

請求項３に記載の発明は、請求項１に記載の自転車フレームの製造方法において、前記半割り連結部材は、前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向の一方側と他方側とで、前記半割り連結部材の軸方向と直交する方向の幅が異なる長さとされており、前記半割り連結部材における前記幅が長い側の内側面に前記リブが形成されている。   A third aspect of the present invention is the bicycle frame manufacturing method according to the first aspect, wherein the half connection member is one side in a direction along an axial direction of the half head pipe or the half seat pipe. And the other side have different lengths in the direction perpendicular to the axial direction of the half connecting member, and the rib is formed on the inner side surface of the half connecting member on the long side. .

請求項３に記載の発明では、半割り連結部材は、半割りヘッドパイプ又は半割りシートパイプの軸方向に沿った方向の一方側と他方側とで、半割り連結部材の軸方向と直交する方向の幅が異なる長さとされていると、振動溶着時に半割り連結部材の当該幅が長い側の溶着面付近が倒れ変形しやすい。したがって、半割り連結部材における前記幅が長い側の内側面にリブが形成されていることで、振動溶着時に半割り連結部材の前記幅が長い側の溶着面付近が倒れ変形するのを抑制することができる。   In the invention according to claim 3, the half connecting member is orthogonal to the axial direction of the half connecting member on one side and the other side in the axial direction of the half head pipe or the half seat pipe. When the lengths in the directions are different, the vicinity of the welding surface on the side where the width of the halved connecting member is long is easily collapsed and deformed during vibration welding. Therefore, the ribs are formed on the inner surface of the half connecting member having the longer width, thereby suppressing the deformation of the vicinity of the welding surface of the half connecting member having the longer width at the time of vibration welding. be able to.

請求項４に記載の発明は、請求項１又は請求項２に記載の自転車フレームの製造方法において、前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向を上下方向として自転車フレームを組み立てたときの前記半割り連結部材の内側面の側部を跨いで上下方向に前記リブが形成されている。   According to a fourth aspect of the present invention, in the bicycle frame manufacturing method according to the first or second aspect, when the bicycle frame is assembled with the axial direction of the half head pipe or the half seat pipe as the vertical direction The said rib is formed in the up-down direction across the side part of the inner surface of the said half split connection member.

請求項４に記載の発明では、半割りヘッドパイプ又は半割りシートパイプの軸方向を上下方向として自転車フレームを組み立てたときの半割り連結部材の内側面の側部を跨いで上下方向にリブが形成されており、振動溶着により半割り連結部材の溶着面を接合する際に、リブにより半割り連結部材の上下方向の溶着面付近の倒れ変形を抑制することができる。   In the invention according to claim 4, the rib is formed in the vertical direction across the side portion of the inner side surface of the half connection member when the bicycle frame is assembled with the axial direction of the half head pipe or the half seat pipe as the vertical direction. Thus, when the welding surfaces of the half connecting members are joined by vibration welding, the ribs can suppress the collapse deformation in the vicinity of the welding surface in the vertical direction of the half connecting members.

請求項５に記載の発明に係る自転車フレームは、ハンドルが装着される開断面の半割りヘッドパイプ及びサドルのシートポストが装着される開断面の半割りシートパイプの少なくとも一方と、前記半割りヘッドパイプ及び前記半割りシートパイプの少なくとも一方に連結される開断面の半割り連結部材と、が一体成形された開断面の半割り自転車フレーム部材を２つ重ね合わせて溶着により接合して形成された閉断面の自転車フレームであって、前記半割り連結部材を接合して形成された連結部材の内側面の少なくとも一部に、前記連結部材の周方向に沿ってリブが形成されている。   According to a fifth aspect of the present invention, there is provided a bicycle frame comprising at least one of an open-section halved head pipe to which a handle is mounted and an open-section halved seat pipe to which a saddle seat post is mounted; A pipe and a half connecting member having an open cross-section connected to at least one of the half seat pipes are formed by overlapping two integrally-formed half-cut bicycle frame members having an open cross-section and joining them by welding. In the bicycle frame having a closed cross section, ribs are formed along at least a part of the inner surface of the connecting member formed by joining the half connecting members along the circumferential direction of the connecting member.

請求項５に記載の発明では、半割り連結部材を接合して形成された連結部材の内側面の少なくとも一部に、連結部材の周方向に沿ってリブが形成されており、振動溶着により半割り連結部材の溶着面を接合して連結部材とする際に、リブにより半割り連結部材の溶着面付近の倒れ変形を抑制することができる。   In the fifth aspect of the present invention, ribs are formed along the circumferential direction of the connecting member on at least a part of the inner side surface of the connecting member formed by joining the half connecting members. When joining the welding surfaces of the split connecting member to form a connecting member, the ribs can suppress the collapse deformation near the welding surface of the half connecting member.

本発明によれば、振動溶着により樹脂製の半割り自転車フレーム部材を接合する際に、半割り連結部材の溶着面付近の変形を抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, when joining a resin-made half bicycle frame member by vibration welding, a deformation | transformation of the welding surface vicinity of a half connection member can be suppressed.

第１実施形態の自転車フレームに適用される樹脂製の半割り自転車フレーム部材を示す斜視図である。It is a perspective view which shows the resin-made half bicycle frame members applied to the bicycle frame of 1st Embodiment. 図１に示す半割り自転車フレーム部材を溶着して一体化した自転車フレームを示す斜視図である。It is a perspective view which shows the bicycle frame which welded and integrated the half-bicycle frame member shown in FIG. 図１に示す半割り自転車フレーム部材の溶着面を振動溶着する際の振動方向を示す側面図である。It is a side view which shows the vibration direction at the time of carrying out the vibration welding of the welding surface of the half-bicycle frame member shown in FIG. 半割り連結部材の内側面に設けられた複数のリブを示す斜視図である。It is a perspective view which shows the some rib provided in the inner surface of a half connection member. （Ａ）は半割り連結部材の軸方向と略直交する上下方向に沿った断面図であり、（Ｂ）は半割り連結部材を溶着して一体化させた連結部材の軸方向と略直交する上下方向に沿った断面図である。(A) is sectional drawing along the up-down direction substantially orthogonal to the axial direction of a half connection member, (B) is substantially orthogonal to the axial direction of the connection member which welded and integrated the half connection member. It is sectional drawing along the up-down direction. 左右一対の半割り自転車フレーム部材を振動溶着する装置を示す斜視図である。It is a perspective view which shows the apparatus which carries out the vibration welding of a pair of right and left half bicycle frame members. （Ａ）は半割り連結部材を振動溶着する装置の溶着前の状態を示す断面図であり、（Ｂ）は半割り連結部材を振動溶着する装置の溶着後の状態を示す断面図である。(A) is sectional drawing which shows the state before welding of the apparatus which carries out vibration welding of the half connection member, (B) is sectional drawing which shows the state after welding of the apparatus which carries out vibration welding of a half connection member. 半割り連結部材の第１変形例であって、（Ａ）は半割り連結部材の軸方向と略直交する上下方向に沿った断面図であり、（Ｂ）は半割り連結部材を溶着して一体化させた連結部材の軸方向と略直交する上下方向に沿った断面図である。It is a 1st modification of a half connection member, Comprising: (A) is sectional drawing along the up-down direction substantially orthogonal to the axial direction of a half connection member, (B) welds a half connection member. It is sectional drawing along the up-down direction substantially orthogonal to the axial direction of the integrated connection member. 半割り連結部材の第２変形例である半割り連結部材の軸方向と略直交する上下方向に沿った断面図である。It is sectional drawing along the up-down direction substantially orthogonal to the axial direction of the half connection member which is a 2nd modification of a half connection member.

以下、本発明の実施の形態を図面に基づいて説明する。なお、これらの図面において適宜示される矢印ＦＲは自転車の前方側を示しており、矢印ＵＰは自転車の上方側を示している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In these drawings, an arrow FR appropriately shown indicates the front side of the bicycle, and an arrow UP indicates the upper side of the bicycle.

図１には、本発明の第１実施形態である自転車フレームの製造方法に用いられる左右一対の半割り自転車フレーム部材１０、２０が示されている。また、図２には、本発明の第１実施形態である自転車フレームの製造方法により製造された自転車フレーム４０が示されている。図１に示されるように、自転車の後面視にて左側と右側に配置される左右一対の開断面の半割り自転車フレーム部材１０、２０は、略上下方向に沿って配置される開断面の半割りヘッドパイプ１２、２２と、半割りヘッドパイプ１２、２２と間隔をおいて上下方向に沿って配置される開断面の半割りシートパイプ１４、２４と、半割りヘッドパイプ１２、２２と半割りシートパイプ１４、２４に交差するように配置されると共に半割りヘッドパイプ１２、２２と半割りシートパイプ１４、２４との間を繋ぐ開断面の上側の半割り連結部材１６、２６及び下側の半割り連結部材１８、２８と、を備えている。さらに、半割り自転車フレーム部材１０、２０は、半割りシートパイプ１４、２４の下端部から後方側に延びたチェーンステー３２、３４と、半割りシートパイプ１４、２４の上端部とチェーンステー３２、３４の後端部とを繋ぐバックホーク３６、３８と、を備えている。   FIG. 1 shows a pair of left and right halved bicycle frame members 10 and 20 used in the bicycle frame manufacturing method according to the first embodiment of the present invention. FIG. 2 shows a bicycle frame 40 manufactured by the bicycle frame manufacturing method according to the first embodiment of the present invention. As shown in FIG. 1, a pair of left and right open-section halved bicycle frame members 10, 20 arranged on the left side and the right side in a rear view of the bicycle are arranged in a substantially half-open section. The split head pipes 12 and 22; the half head pipes 12 and 22 having an open cross-section disposed along the up and down direction at an interval from the half head pipes 12 and 22; The upper half-split connecting members 16, 26 and the lower side of the open cross section that are arranged to intersect the seat pipes 14, 24 and connect between the half-head pipes 12, 22 and the half-split seat pipes 14, 24 And half-split connecting members 18 and 28. Further, the half-bicycle frame members 10 and 20 include chain stays 32 and 34 extending rearward from the lower ends of the half-seat pipes 14 and 24, and upper ends of the half-seat pipes 14 and 24 and the chain stay 32, 34, and back hawks 36 and 38 that connect the rear end portions of 34.

半割り自転車フレーム部材１０は、半割りヘッドパイプ１２と、半割りシートパイプ１４と、上側の半割り連結部材１６と、下側の半割り連結部材１８と、チェーンステー３２と、バックホーク３６とが樹脂で一体成形されている。また、半割り自転車フレーム部材２０は、半割りヘッドパイプ２２と、半割りシートパイプ２４と、上側の半割り連結部材２６と、下側の半割り連結部材２８と、チェーンステー３４と、バックホーク３８とが樹脂で一体成形されている。   The half bicycle frame member 10 includes a half head pipe 12, a half seat pipe 14, an upper half connection member 16, a lower half connection member 18, a chain stay 32, and a back fork 36. Is integrally formed of resin. Further, the half bicycle frame member 20 includes a half head pipe 22, a half seat pipe 24, an upper half connection member 26, a lower half connection member 28, a chain stay 34, a backhawk. 38 are integrally formed of resin.

図３に示されるように、左側の半割り自転車フレーム部材１０には、半割りヘッドパイプ１２の前端部と後端部に上下方向に沿って溶着面１２Ａ、１２Ｂが形成されており、半割りシートパイプ１４の前端部と後端部に上下方向に沿って溶着面１４Ａ、１４Ｂが形成されている。半割りヘッドパイプ１２と半割りシートパイプ１４は、横方向に沿った断面が略半円状に形成されており、周方向に沿ってほぼ均一な厚みで形成されている。図示を省略するが、右側の半割り自転車フレーム部材２０は、左側の半割り自転車フレーム部材１０と左右対称であり、半割りヘッドパイプ２２と半割りシートパイプ２４に同様に溶着面が形成されている。   As shown in FIG. 3, the left half bicycle frame member 10 has welding surfaces 12A and 12B formed in the front and rear ends of the half head pipe 12 along the vertical direction. Welding surfaces 14 </ b> A and 14 </ b> B are formed on the front end portion and the rear end portion of the seat pipe 14 along the vertical direction. The half-head pipe 12 and the half-sheet pipe 14 are formed in a substantially semicircular cross section along the lateral direction, and are formed with a substantially uniform thickness along the circumferential direction. Although not shown, the right half bicycle frame member 20 is bilaterally symmetric with the left half bicycle frame member 10, and a welding surface is similarly formed on the half head pipe 22 and the half seat pipe 24. Yes.

また、左側の半割り自転車フレーム部材１０には、上側の半割り連結部材１６の上端部と下端部に溶着面１６Ａ、１６Ｂが形成されており、下側の半割り連結部材１８の上端部と下端部に溶着面１８Ａ、１８Ｂが形成されている。   The left half-bicycle frame member 10 is formed with welding surfaces 16A and 16B at the upper end and the lower end of the upper half connecting member 16, and the upper half connecting member 18 has an upper end and a lower end. Welding surfaces 18A and 18B are formed at the lower end.

図５（Ａ）に示されるように、左右一対の下側の半割り連結部材１８、２８は、軸方向と略直交する上下方向の断面（半割りシートパイプ１４、２４の軸方向に沿った断面）にて、上端部の溶着面１８Ａ，２８Ａと下端部の溶着面１８Ｂ，２８Ｂとが重ね合わされたときに卵形となるように形成されている。下側の半割り連結部材１８、２８は、上端部の溶着面１８Ａ，２８Ａと下端部の溶着面１８Ｂ，２８Ｂの幅（半割りシートパイプ１４、２４の軸方向に沿った方向の幅）が半割り連結部材１８、２８の側部１８Ｃ、２８Ｃの厚み（肉厚）よりも厚く形成されている。さらに、下端部の溶着面１８Ｂ，２８Ｂの幅が上端部の溶着面１８Ａ，２８Ａの幅よりも大きく形成されている。   As shown in FIG. 5 (A), the pair of left and right lower half connecting members 18 and 28 are vertically sectioned substantially along the axial direction (along the axial direction of the half seat pipes 14 and 24). In the cross section), the welding surfaces 18A, 28A at the upper end and the welding surfaces 18B, 28B at the lower end are overlapped to form an oval shape. The lower half connecting members 18 and 28 have the widths of the welding surfaces 18A and 28A at the upper end and the welding surfaces 18B and 28B at the lower end (the width in the direction along the axial direction of the half seat pipes 14 and 24). It is formed thicker than the thickness (thickness) of the side portions 18C and 28C of the half connecting members 18 and 28. Furthermore, the width of the welding surfaces 18B and 28B at the lower end is formed larger than the width of the welding surfaces 18A and 28A at the upper end.

また、下側の半割り連結部材１８、２８は、上部側と下部側の左右方向の幅（半割り連結部材１８、２８の軸方向と交差する方向の幅）が異なる長さとされており、左右方向の幅が長い下部側の内側面にリブ３０が形成されている。下側の半割り連結部材１８、２８の上部側と下部側は、半割りヘッドパイプ１２、２２又は半割りシートパイプ１４、２４の軸方向に沿った方向の一方側と他方側に配置されている。図４及び図５に示されるように、リブ３０は、下側の半割り連結部材１８、２８の下端部の溶着面１８Ｂ，２８Ｂと側部１８Ｃ、２８Ｃとの間の内側面に左右方向に沿って設けられている。また、リブ３０は、下側の半割り連結部材１８、２８の軸方向にほぼ等間隔で複数設けられている。   In addition, the lower half connecting members 18 and 28 have different lengths in the left-right direction on the upper side and the lower side (widths in the direction intersecting the axial direction of the half connecting members 18 and 28). Ribs 30 are formed on the inner surface on the lower side having a long width in the left-right direction. The upper and lower sides of the lower half connecting members 18 and 28 are arranged on one side and the other side in the direction along the axial direction of the half head pipes 12 and 22 or the half seat pipes 14 and 24, respectively. Yes. As shown in FIGS. 4 and 5, the rib 30 is formed in the left-right direction on the inner side surface between the welding surfaces 18B, 28B and the side portions 18C, 28C at the lower ends of the lower half connecting members 18, 28. It is provided along. Further, a plurality of ribs 30 are provided at substantially equal intervals in the axial direction of the lower half connecting members 18 and 28.

図示を省略するが、左右一対の上側の半割り連結部材１６、２６は、上下方向に沿った断面が下側の半割り連結部材１８、２８と上下対称に形成されている。   Although not shown, the pair of left and right upper half connecting members 16 and 26 are formed so that the cross section along the vertical direction is vertically symmetrical with the lower half connecting members 18 and 28.

図１及び図２等に示されるように、左右一対の半割り自転車フレーム部材１０、２０は、半割りヘッドパイプ１２、２２と、半割りシートパイプ１４、２４と、上側の半割り連結部材１６、２６と、下側の半割り連結部材１８、２８の各溶着面が重ね合わされて振動溶着によって接合されることで、左右一対の半割り自転車フレーム部材１０、２０が一体化された閉断面の自転車フレーム４０が形成されている。図３に示されるように、振動溶着では、半割りヘッドパイプ１２及び半割りシートパイプ１４の軸方向（半割りヘッドパイプ１２及び半割りシートパイプ１４の長手方向、すなわち矢印Ａ方向、矢印Ｂ方向）に沿って振動させる。すなわち、半割りヘッドパイプ１２の溶着面１２Ａ、１２Ｂと半割りシートパイプ１４の溶着面１４Ａ、１４Ｂは振動方向とほぼ平行に配置され、上側の半割り連結部材１６の軸方向に沿った溶着面１６Ａ、１６Ｂと、下側の半割り連結部材１８の軸方向に沿った溶着面１８Ａ、１８Ｂが振動方向と交差するように配置されている。下側の半割り連結部材１８、２８の内側面の下部側には、半割り連結部材１８、２８の周方向に沿ってリブ３０が形成されている。言い換えると、リブ３０は、振動溶着の振動方向と交差する方向に配置されている。   As shown in FIGS. 1 and 2, etc., the pair of left and right half bicycle frame members 10, 20 includes a half head pipe 12, 22, a half seat pipe 14, 24, and an upper half connecting member 16. , 26 and the lower half connecting members 18, 28 are overlapped and joined by vibration welding so that a pair of left and right half bicycle frame members 10, 20 are integrated into a closed cross section. A bicycle frame 40 is formed. As shown in FIG. 3, in vibration welding, the axial direction of the half head pipe 12 and the half seat pipe 14 (the longitudinal direction of the half head pipe 12 and the half seat pipe 14, that is, the arrow A direction and the arrow B direction). ). That is, the welding surfaces 12A and 12B of the half-head pipe 12 and the welding surfaces 14A and 14B of the half-sheet pipe 14 are arranged substantially in parallel with the vibration direction, and the welding surfaces along the axial direction of the upper half connecting member 16 are arranged. 16A, 16B and welding surfaces 18A, 18B along the axial direction of the lower half connecting member 18 are arranged so as to intersect the vibration direction. Ribs 30 are formed on the lower side of the inner side surfaces of the lower half connecting members 18 and 28 along the circumferential direction of the half connecting members 18 and 28. In other words, the rib 30 is disposed in a direction that intersects the vibration direction of vibration welding.

左右一対の半割り自転車フレーム部材１０、２０は、半割りヘッドパイプ１２、２２と、半割りシートパイプ１４、２４と、上側の半割り連結部材１６、２６と、下側の半割り連結部材１８、２８の各溶着面が重ね合わされて振動溶着されることで、圧力と往復運動による摩擦熱で溶着面が溶融し、接合される。これにより、図２に示されるように、閉断面のヘッドパイプ４２と、閉断面のシートパイプ４４と、ヘッドパイプ４２とシートパイプ４４とを繋ぐ閉断面の上側の連結部材４６及び下側の連結部材４８と、を備えた自転車フレーム４０が形成される。その際、半割りヘッドパイプ１２、２２と半割りシートパイプ１４、２４の軸方向に振動方向が設定されていることで、振動溶着時の半割りヘッドパイプ１２、２２と、半割りシートパイプ１４、２４との溶着面のズレが抑制され、溶着後のヘッドパイプ４２とシートパイプ４４の強度及び寸法精度が確保される。   The pair of left and right halved bicycle frame members 10 and 20 are divided into half head pipes 12 and 22, half seat pipes 14 and 24, upper half connection members 16 and 26, and lower half connection member 18. , 28 are overlapped and vibration welded, so that the weld surfaces are melted and joined by frictional heat generated by pressure and reciprocating motion. Accordingly, as shown in FIG. 2, the closed section head pipe 42, the closed section seat pipe 44, the upper section connecting member 46 that connects the head pipe 42 and the seat pipe 44, and the lower section connection are connected. A bicycle frame 40 having a member 48 is formed. At that time, the vibration direction is set in the axial direction of the half head pipes 12, 22 and the half seat pipes 14, 24, so that the half head pipes 12, 22 and the half seat pipe 14 at the time of vibration welding are provided. , 24 is suppressed, and the strength and dimensional accuracy of the head pipe 42 and the seat pipe 44 after welding are ensured.

また、下側の半割り連結部材１８、２８の軸方向は、振動溶着による振動方向と交差する方向に配置されているが、半割り連結部材１８、２８の溶着面１８Ｂ、２８Ｂ付近の内側面の下部側に、周方向に沿って（振動方向と交差する方向に）リブ３０が設けられているため、振動溶着時に溶着面１８Ｂ、２８Ｂ付近が倒れ変形（特に溶着面１８Ｂ、２８Ｂ付近が内側に倒れ変形）することが抑制されるようになっている。   Further, the axial direction of the lower half connecting members 18 and 28 is arranged in a direction intersecting with the vibration direction by vibration welding, but the inner side surfaces of the half connecting members 18 and 28 in the vicinity of the welding surfaces 18B and 28B. Since ribs 30 are provided along the circumferential direction (in a direction intersecting with the vibration direction), the vicinity of the welding surfaces 18B and 28B collapses during vibration welding (particularly, the vicinity of the welding surfaces 18B and 28B is the inside). To be deformed).

また、本実施形態では、図５（Ａ）に示されるように、左右一対の下側の半割り連結部材１８、２８は、上端部の溶着面１８Ａ，２８Ａと下端部の溶着面１８Ｂ，２８Ｂの幅が半割り連結部材１８、２８の側部１８Ｃ、２８Ｃの厚みよりも厚く形成されていることで、振動溶着時の溶着面１８Ａ，２８Ａと、溶着面１８Ｂ，２８Ｂとのズレが吸収され、溶着性の低下が抑制されるようになっている。   Further, in the present embodiment, as shown in FIG. 5A, the pair of left and right lower half linking members 18, 28 are welded surfaces 18A, 28A at the upper end and welded surfaces 18B, 28B at the lower end. Is formed to be thicker than the thickness of the side portions 18C and 28C of the half connecting members 18 and 28, the deviation between the welding surfaces 18A and 28A and the welding surfaces 18B and 28B during vibration welding is absorbed. In addition, a decrease in weldability is suppressed.

さらに、左右一対の下側の半割り連結部材１８、２８は、軸方向と直交する方向である左右方向の幅が長い下端部の溶着面１８Ｂ，２８Ｂの幅を、左右方向の幅が短い上端部の溶着面１８Ａ，２８Ａの幅よりも厚くしている。左右方向の幅が長いと振動溶着時に溶着面付近が倒れ変形しやすいが、下端部の溶着面１８Ｂ，２８Ｂの幅を厚くすることで、溶着面１８Ｂ，２８Ｂ付近の倒れ変形をより確実に抑制することができる。   Furthermore, the pair of left and right lower half linking members 18 and 28 have the widths of the welding surfaces 18B and 28B at the lower end with a large width in the left and right direction, which is a direction orthogonal to the axial direction, and the upper ends with a short width in the left and right direction It is thicker than the width of the welding surfaces 18A and 28A. If the width in the left-right direction is long, the vicinity of the weld surface will fall down and deform easily during vibration welding, but by increasing the width of the weld surfaces 18B and 28B at the lower end, the fall deformation near the weld surfaces 18B and 28B can be more reliably suppressed. can do.

なお、下側の半割り連結部材１８、２８と上下対称に形成された上側の半割り連結部材１６、２６もほぼ同じである。   The upper half connecting members 16 and 26 formed symmetrically with the lower half connecting members 18 and 28 are substantially the same.

次に、本実施形態の自転車フレーム４０の製造方法について説明する。   Next, the manufacturing method of the bicycle frame 40 of this embodiment is demonstrated.

図６に示されるように、自転車フレーム４０を製造するための振動溶着装置６０は、片側の面に半割り自転車フレーム部材１０が嵌め込まれる凹部６２Ａを備えた略矩形状の溶着治具６２と、凹部６２Ａと対向する面に半割り自転車フレーム部材２０が嵌め込まれる凹部６４Ａを備えた略矩形状の溶着治具６４と、を備えている。この振動溶着装置６０では、図６に示す装置上下方向の上方側に溶着治具６２が配置され、下方側に溶着治具６４が配置されている。この振動溶着装置６０では、溶着治具６４を固定した状態で、溶着治具６２の半割り自転車フレーム部材１０の各溶着面を溶着治具６４の半割り自転車フレーム部材２０の各溶着面に荷重をかけて接触させ、半割りヘッドパイプ１２及び半割りシートパイプ１４の軸方向（略上下方向）に振動させることで、半割り自転車フレーム部材１０の各溶着面と半割り自転車フレーム部材２０の各溶着面とを振動溶着により接合する。   As shown in FIG. 6, the vibration welding device 60 for manufacturing the bicycle frame 40 includes a substantially rectangular welding jig 62 having a recess 62 </ b> A into which the half-bicycle frame member 10 is fitted on one side surface, A substantially rectangular welding jig 64 having a concave portion 64A into which the half-bicycle frame member 20 is fitted on a surface facing the concave portion 62A. In this vibration welding apparatus 60, a welding jig 62 is disposed on the upper side in the vertical direction of the apparatus shown in FIG. 6, and a welding jig 64 is disposed on the lower side. In the vibration welding apparatus 60, the welding surfaces of the half-bicycle frame member 10 of the welding jig 62 are loaded on the welding surfaces of the half-bicycle frame member 20 of the welding jig 64 with the welding jig 64 fixed. , And are caused to vibrate in the axial direction (substantially up and down direction) of the half head pipe 12 and the half seat pipe 14, so that each welding surface of the half bicycle frame member 10 and each half bicycle frame member 20 are The welding surface is joined by vibration welding.

図７（Ａ）、（Ｂ）には、左右一対の下側の半割り連結部材１８の溶着面と下側の半割り連結部材２８の溶着面とを振動溶着させる工程が部分断面図にて示されている。図７（Ａ）に示されるように、溶着治具６２の凹部６２Ａに嵌め込まれた下側の半割り連結部材１８の溶着面１８Ａ、１８Ｂと、溶着治具６４の凹部６４Ａに嵌め込まれた下側の半割り連結部材２８の溶着面２８Ａ、２８Ｂと、が対向配置されている。図７（Ｂ）に示されるように、溶着治具６４を固定した状態で、溶着治具６２の半割り連結部材１８の溶着面１８Ａ、１８Ｂを溶着治具６４の半割り連結部材２８の溶着面２８Ａ、２８Ｂに図示しない押圧手段により矢印Ｃ方向に荷重をかけて接触させると共に、振動装置６６により略上下方向（矢印Ａ方向）に振動させる。これにより、半割り連結部材１８の溶着面１８Ａ、１８Ｂと半割り連結部材２８の溶着面２８Ａ、２８Ｂとが、圧力と往復運動による摩擦熱で溶融し、接合されることで、閉断面の連結部材４８が形成される。   7A and 7B are partial cross-sectional views showing a process of vibration welding the welding surface of the pair of left and right lower half connecting members 18 and the welding surface of the lower half connecting member 28. It is shown. As shown in FIG. 7A, the welding surfaces 18A and 18B of the lower half connecting member 18 fitted in the recess 62A of the welding jig 62 and the lower part fitted in the recess 64A of the welding jig 64 are shown. The welding surfaces 28A and 28B of the half-split connecting member 28 are arranged to face each other. 7B, with the welding jig 64 fixed, the welding surfaces 18A and 18B of the half connecting member 18 of the welding jig 62 are welded to the half connecting member 28 of the welding jig 64. As shown in FIG. A load is applied to the surfaces 28A and 28B by a pressing means (not shown) in the direction of arrow C, and the surface is vibrated in a substantially vertical direction (arrow A direction) by the vibration device 66. As a result, the welding surfaces 18A and 18B of the half connecting member 18 and the welding surfaces 28A and 28B of the half connecting member 28 are melted and joined by pressure and frictional heat due to reciprocating motion, thereby connecting the closed cross section. A member 48 is formed.

開断面の半割り自転車フレーム部材１０、２０の各溶着面が接合された閉断面の自転車フレーム４０を自転車に用いる際には、ヘッドパイプ４２にはハンドル（図示省略）が装着され、シートパイプ４４にはサドルのシートポスト（図示省略）が装着される。   When the bicycle frame 40 having a closed cross section in which the welding surfaces of the half-cut bicycle frame members 10 and 20 having an open cross section are joined to a bicycle is used for a bicycle, a handle (not shown) is attached to the head pipe 42, and the seat pipe 44. A saddle seat post (not shown) is attached to the.

このような自転車フレーム４０の製造方法では、振動溶着の振動方向が半割りヘッドパイプ１２、２２と半割りシートパイプ１４、２４の軸方向に設定されており、上側の半割り連結部材１６、２６及び下側の半割り連結部材１８、２８の軸方向は振動方向と交差する方向に配置されている。その際、図４及び図５に示されるように、下側の半割り連結部材１８、２８の溶着面１８Ｂ、２８Ｂ付近の内側面の下部側には、周方向に沿って（振動方向と交差する方向に）複数のリブ３０が形成されており、振動溶着時に溶着面１８Ｂ、２８Ｂ付近が（特に内側に）倒れ変形するのを抑制することができる。   In such a manufacturing method of the bicycle frame 40, the vibration direction of vibration welding is set in the axial direction of the half head pipes 12, 22 and the half seat pipes 14, 24, and the upper half connecting members 16, 26 are arranged. And the axial direction of the lower half connection members 18 and 28 is arranged in a direction crossing the vibration direction. At that time, as shown in FIGS. 4 and 5, the lower side of the inner side surface near the welding surfaces 18B, 28B of the lower half connecting members 18, 28 is arranged along the circumferential direction (crossing the vibration direction). A plurality of ribs 30 are formed (in the direction in which the welding is performed), and the vicinity of the welding surfaces 18B and 28B (particularly inward) can be prevented from falling and deforming during vibration welding.

また、下側の半割り連結部材１８、２８は、下端部の溶着面１８Ｂ，２８Ｂ付近の左右方向の幅が、上端部の溶着面１８Ａ，２８Ａ付近の左右方向の幅よりも長いが、左右方向の幅が長い下端部の溶着面１８Ｂ，２８Ｂ付近の内側面にリブ３０を設けることで、振動溶着時に溶着面１８Ｂ、２８Ｂ付近が（特に内側に）倒れ変形するのをより一層抑制することができる。   Further, the lower half connecting members 18 and 28 have a width in the left and right direction near the welding surfaces 18B and 28B at the lower end portion longer than a width in the left and right direction near the welding surfaces 18A and 28A at the upper end portion. By providing the rib 30 on the inner side surface in the vicinity of the welding surfaces 18B and 28B at the lower end portion having a long width in the direction, it is possible to further suppress the vicinity of the welding surfaces 18B and 28B from falling down (particularly inward) during vibration welding. Can do.

さらに、下端部の溶着面１８Ｂ，２８Ｂの幅を上端部の溶着面１８Ａ，２８Ａの幅よりも厚くすることで、溶着面１８Ｂ，２８Ｂ付近の倒れ変形をより確実に抑制することができる。   Furthermore, by making the width of the welding surfaces 18B, 28B at the lower end portion thicker than the widths of the welding surfaces 18A, 28A at the upper end portion, it is possible to more reliably suppress the collapse deformation near the welding surfaces 18B, 28B.

なお、上側の半割り連結部材１６、２６は、下側の半割り連結部材１８、２８と上下対称であるので、同様に半割り連結部材１６、２６の溶着面付近の倒れ変形を抑制することができる。   In addition, since the upper half connection members 16 and 26 are vertically symmetrical with the lower half connection members 18 and 28, similarly, the collapse deformation in the vicinity of the welding surface of the half connection members 16 and 26 is suppressed. Can do.

次に、本発明の第１変形例である自転車フレームの連結部材について説明する。なお、第１実施形態と同一の部材には同一の符号を付し、重複した説明は省略する。   Next, a bicycle frame connecting member according to a first modification of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

図８（Ａ）に示すように、半割りヘッドパイプ（図１参照）と半割りシートパイプ（図１参照）とを繋ぐ左右一対の開断面の半割り連結部材８２、８４は、上端部の溶着面８２Ａ，８４Ａと下端部の溶着面８２Ｂ，８４Ｂの幅（半割りシートパイプの軸方向に沿った方向の長さ）が半割り連結部材８２、８４の側部８２Ｃ、８４Ｃの厚み（肉厚）よりも厚く形成されている。半割り連結部材８２、８４の内側面には、上下方向の両側、すなわち側部８２Ｃ、８４Ｃの上部側と下部側にリブ８６、８８が形成されている。振動溶着による振動方向は、半割りシートパイプの軸方向（略上下方向）に設定されている。リブ８６は、上端部の溶着面８２Ａ，８４Ａ付近の半割り連結部材８２、８４の内側面の上部側に周方向に沿って（振動方向と交差する方向に）設けられている。また、リブ８８は、下端部の溶着面８２Ｂ，８４Ｂ付近の半割り連結部材８２、８４の内側面の下部側に周方向に沿って（振動方向と交差する方向に）設けられている。   As shown in FIG. 8A, a pair of left and right open half-section connecting members 82 and 84 that connect the half head pipe (see FIG. 1) and the half seat pipe (see FIG. 1) The width (the length in the direction along the axial direction of the half seat pipe) of the weld surfaces 82A, 84A and the lower end weld surfaces 82B, 84B is the thickness (meat) of the side portions 82C, 84C of the half connection members 82, 84. It is formed thicker than (thickness). Ribs 86 and 88 are formed on the inner side surfaces of the half connecting members 82 and 84 on both sides in the vertical direction, that is, on the upper and lower sides of the side portions 82C and 84C. The vibration direction by vibration welding is set in the axial direction (substantially up and down direction) of the half seat pipe. The rib 86 is provided along the circumferential direction (in a direction intersecting with the vibration direction) on the upper side of the inner side surface of the half connecting members 82 and 84 in the vicinity of the welding surfaces 82A and 84A at the upper end. Further, the rib 88 is provided along the circumferential direction (in a direction intersecting with the vibration direction) on the lower side of the inner side surface of the half connecting members 82 and 84 near the welding surfaces 82B and 84B at the lower end.

半割り連結部材８２、８４の上端部の溶着面８２Ａ，８４Ａと、下端部の溶着面８２Ｂ，８４Ｂをそれぞれ振動溶着により溶融接合することで、図８（Ｂ）に示すように、半割り連結部材８２、８４が一体となった閉断面の連結部材９０が形成される。なお、上側と下側の連結部材９０は、上下方向に沿った断面が上下対称に形成されている。   As shown in FIG. 8 (B), the welded surfaces 82A and 84A at the upper end portions of the half-split connecting members 82 and 84 and the weld surfaces 82B and 84B at the lower end portions are melt-bonded by vibration welding. A connecting member 90 having a closed cross section in which the members 82 and 84 are integrated is formed. The upper and lower connecting members 90 are formed so that the cross section along the vertical direction is vertically symmetrical.

このような半割り連結部材８２、８４では、半割り連結部材８２、８４の軸方向が振動方向と交差する方向に配置されているが、上端部の溶着面８２Ａ、８４Ａ付近の内側面の上部側には、周方向に沿って（振動方向と交差する方向に）複数のリブ８６が形成されており、振動溶着時に溶着面８２Ａ、８４Ａ付近が（特に内側に）倒れ変形するのを抑制することができる。また、下端部の溶着面８２Ｂ、８４Ｂ付近の内側面の下部側には、周方向に沿って（振動方向と交差する方向に）複数のリブ８８が形成されており、振動溶着時に溶着面８２Ｂ、８４Ｂ付近が（特に内側に）倒れ変形するのを抑制することができる。   In such a half connecting member 82, 84, the axial direction of the half connecting members 82, 84 is arranged in a direction intersecting the vibration direction, but the upper part of the inner side surface in the vicinity of the welding surfaces 82A, 84A at the upper end. On the side, a plurality of ribs 86 are formed along the circumferential direction (in a direction crossing the vibration direction), and the vicinity of the welding surfaces 82A and 84A (particularly inward) is prevented from falling and deforming during vibration welding. be able to. A plurality of ribs 88 are formed along the circumferential direction (in a direction intersecting the vibration direction) on the lower side of the inner side surface near the welding surfaces 82B and 84B at the lower end, and the welding surface 82B is formed during vibration welding. , 84B (in particular, inward) can be prevented from falling and deforming.

次に、本発明の第２変形例である自転車フレームの連結部材について説明する。なお、第１実施形態及び第１変形例と同一の部材には同一の符号を付し、重複した説明は省略する。   Next, a bicycle frame connecting member according to a second modification of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment and a 1st modification, and the overlapping description is abbreviate | omitted.

図９に示されるように、半割りヘッドパイプと半割りシートパイプとを繋ぐ左右一対の開断面の半割り連結部材１１０、１１２は、上端部の溶着面１１０Ａ，１１２Ａと下端部の溶着面１１０Ｂ，１１２Ｂの幅（半割りシートパイプの軸方向に沿った方向の長さ）が半割り連結部材１１０、１１２の側部１１０Ｃ、１１２Ｃの厚み（肉厚）よりも厚く形成されている。半割り連結部材１１０、１１２の内側面には、側部１１０Ｃ、１１２Ｃを跨いで上下方向に沿ってリブ１１４、１１６が形成されている。リブ１１４、１１６は、半割り連結部材１１０、１１２の内側面の略周方向に沿って形成されている。振動溶着による振動方向は、半割りシートパイプの軸方向（略上下方向）であって、半割り連結部材１１０、１１２の軸方向と交差する方向に設定されている。   As shown in FIG. 9, the pair of left and right half-section connecting members 110 and 112 that connect the half-head pipe and the half-seat pipe are welded surfaces 110A and 112A at the upper end and welded surface 110B at the lower end. , 112B (length in the direction along the axial direction of the half seat pipe) is formed to be thicker than the thickness (wall thickness) of the side portions 110C, 112C of the half connection members 110, 112. Ribs 114 and 116 are formed on the inner side surfaces of the half connecting members 110 and 112 along the vertical direction across the side portions 110C and 112C. The ribs 114 and 116 are formed along the substantially circumferential direction of the inner side surfaces of the half connecting members 110 and 112. The vibration direction by vibration welding is set in the axial direction (substantially vertical direction) of the half seat pipe and in a direction intersecting with the axial direction of the half connection members 110 and 112.

このような半割り連結部材１１０、１１２では、半割り連結部材１１０、１１２の軸方向が振動方向と交差する方向に配置されているが、半割り連結部材１１０、１１２の内側面に側部１１０Ｃ、１１２Ｃを跨いで上下方向に沿ってリブ１１４、１１６が形成されていることで、振動溶着時に溶着面１１０Ａ、１１２Ａ付近及び溶着面１１０Ｂ、１１２Ｂ付近が（特に内側に）倒れ変形するのを抑制することができる。   In such a half connection member 110, 112, the axial direction of the half connection member 110, 112 is arranged in a direction crossing the vibration direction, but the side portion 110C is formed on the inner surface of the half connection member 110, 112. , 112C and ribs 114 and 116 are formed along the vertical direction, so that the welding surfaces 110A and 112A and the welding surfaces 110B and 112B are prevented from being collapsed (particularly inward) during vibration welding. can do.

なお、半割り連結部材の軸方向と直交する断面形状は適宜変更することが可能である。また、リブの大きさや半割り連結部材の内周面の周方向におけるリブの形成範囲も変更することが可能であり、半割り連結部材の軸方向のリブの位置や個数も適宜変更することが可能である。   In addition, the cross-sectional shape orthogonal to the axial direction of the half connecting member can be changed as appropriate. Also, the rib size and the rib forming range in the circumferential direction of the inner peripheral surface of the half connecting member can be changed, and the position and number of the ribs in the axial direction of the half connecting member can be changed as appropriate. Is possible.

なお、第１実施形態、第１変形例及び第２変形例では、半割りヘッドパイプと、半割りシートパイプと、半割りヘッドパイプと半割りシートパイプとを繋ぐ半割り連結部材と、が一体成形された半割り自転車フレーム部材を用いたが、これに限定されるものではない。例えば、半割りシートパイプと該半割りシートパイプに連結される半割り連結部材とが一体成形された半割り自転車フレーム部材、又は、半割りヘッドパイプと該半割りヘッドパイプに連結される半割り連結部材とが一体成形された半割り自転車フレーム部材を用いてもよい。   In the first embodiment, the first modification, and the second modification, the half head pipe, the half seat pipe, and the half connection member that connects the half head pipe and the half seat pipe are integrated. Although the molded half bicycle frame member is used, the present invention is not limited to this. For example, a half bicycle frame member in which a half seat pipe and a half joint member connected to the half seat pipe are integrally formed, or a half head pipe and a half joint connected to the half head pipe. A half bicycle frame member integrally formed with the connecting member may be used.

１０、２０ 半割り自転車フレーム部材
１２、２２ 半割りヘッドパイプ
１２Ａ 溶着面
１４、２４ 半割りシートパイプ
１４Ａ 溶着面
１６、２６ 半割り連結部材
１６Ａ 溶着面
１８、２８ 半割り連結部材
１８Ａ，２８Ａ 溶着面
１８Ｂ，２８Ｂ 溶着面
１８Ｃ，２８Ｃ 側部
４０ 自転車フレーム
４２ ヘッドパイプ
４４ シートパイプ
４６ 連結部材
４８ 連結部材
８２、８４ 半割り連結部材
８２Ａ，８４Ａ 溶着面
８２Ｂ，８４Ｂ 溶着面
８２Ｃ，８４Ｃ 側部
８６ リブ
８８ リブ
９０ 連結部材
１１０、１１２ 半割り連結部材
１１０Ａ，１１２Ａ 溶着面
１１０Ｂ，１１２Ｂ 溶着面
１１０Ｃ，１１２Ｃ 側部
１１４ リブ
１１６ リブ 10, 20 Half-divided bicycle frame member 12, 22 Half-split head pipe 12A Welding surface 14, 24 Half-split seat pipe 14A Welding surface 16, 26 Half-split connecting member 16A Welding surface 18, 28 Half-split connecting member 18A, 28A Welding surface 18B, 28B Welding surface 18C, 28C Side 40 Bicycle frame 42 Head pipe 44 Seat pipe 46 Connecting member 48 Connecting member 82, 84 Half split connecting member 82A, 84A Welding surface 82B, 84B Welding surface 82C, 84C Side 86 Rib 88 Rib 90 Connecting member 110, 112 Split connection member 110A, 112A Welding surface 110B, 112B Welding surface 110C, 112C Side portion 114 Rib 116 Rib

Claims (5)

ハンドルが装着される開断面の半割りヘッドパイプ及びサドルのシートポストが装着される開断面の半割りシートパイプの少なくとも一方と、前記半割りヘッドパイプ及び前記半割りシートパイプの少なくとも一方に連結される開断面の半割り連結部材と、が一体成形された開断面の半割り自転車フレーム部材を２つ重ね合わせて振動溶着により接合して閉断面の自転車フレームとするときに、前記振動溶着による振動方向を前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向とすると共に、
前記振動方向と交差する方向に軸方向が配置された前記半割り連結部材の内側面の少なくとも一部に、前記半割り連結部材の周方向に沿ってリブが形成されている自転車フレームの製造方法。 Connected to at least one of an open-section half-head pipe to which a handle is attached and an open-section half-seat pipe to which a saddle seat post is attached, and at least one of the half-head pipe and the half-seat pipe When a half-cycle bicycle frame member having an open cross-section having an open cross-section formed integrally is overlapped and joined by vibration welding to form a bicycle frame having a closed cross-section, vibration caused by vibration welding The direction is a direction along the axial direction of the half head pipe or the half seat pipe,
A method for manufacturing a bicycle frame, wherein a rib is formed along at least a part of an inner surface of the half connecting member having an axial direction arranged in a direction crossing the vibration direction along a circumferential direction of the half connecting member. . 前記半割り連結部材の内側面には、前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向の少なくとも両側に前記リブがそれぞれ形成されている請求項１に記載の自転車フレームの製造方法。   2. The bicycle frame according to claim 1, wherein the rib is formed on at least both sides in the axial direction of the half head pipe or the half seat pipe on an inner surface of the half connecting member. Production method. 前記半割り連結部材は、前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向に沿った方向の一方側と他方側とで、前記半割り連結部材の軸方向と直交する方向の幅が異なる長さとされており、
前記半割り連結部材における前記幅が長い側の内側面に前記リブが形成されている請求項１に記載の自転車フレームの製造方法。 The half connecting member has a width in a direction orthogonal to the axial direction of the half connecting member on one side and the other side in the axial direction of the half head pipe or the half seat pipe. It is said to be length,
The method for manufacturing a bicycle frame according to claim 1, wherein the rib is formed on an inner side surface of the half connecting member on the long side. 前記半割りヘッドパイプ又は前記半割りシートパイプの軸方向を上下方向として自転車フレームを組み立てたときの前記半割り連結部材の内側面の側部を跨いで上下方向に前記リブが形成されている請求項１又は請求項２に記載の自転車フレームの製造方法。   The rib is formed in the vertical direction across the side part of the inner side surface of the half connection member when the bicycle frame is assembled with the axial direction of the half head pipe or the half seat pipe as the vertical direction. The manufacturing method of the bicycle frame of Claim 1 or Claim 2. ハンドルが装着される開断面の半割りヘッドパイプ及びサドルのシートポストが装着される開断面の半割りシートパイプの少なくとも一方と、前記半割りヘッドパイプ及び前記半割りシートパイプの少なくとも一方に連結される開断面の半割り連結部材と、が一体成形された開断面の半割り自転車フレーム部材を２つ重ね合わせて溶着により接合して形成された閉断面の自転車フレームであって、
前記半割り連結部材を接合して形成された連結部材の内側面の少なくとも一部に、前記連結部材の周方向に沿ってリブが形成されている自転車フレーム。 Connected to at least one of an open-section half-head pipe to which a handle is attached and an open-section half-seat pipe to which a saddle seat post is attached, and at least one of the half-head pipe and the half-seat pipe A closed cross-section bicycle frame formed by superposing two open-section half-cycle bicycle frame members integrally formed and joining them by welding,
A bicycle frame in which a rib is formed along at least a part of an inner surface of a connection member formed by joining the half connection members along a circumferential direction of the connection member.
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JPH11105766A (en) * 1997-10-03 1999-04-20 Honda Motor Co Ltd Body frame of motorcycle
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JP2011105140A (en) * 2009-11-17 2011-06-02 Toyoda Gosei Co Ltd Steering wheel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3004828U (en) * 1994-05-31 1994-11-29 必翔 伍 Motorcycle type frame body
US6123353A (en) * 1997-02-19 2000-09-26 Techmatics, Inc. Method of joining and reinforcing molded plastic bicycle frames
JPH11105766A (en) * 1997-10-03 1999-04-20 Honda Motor Co Ltd Body frame of motorcycle
JP2006044262A (en) * 2004-07-08 2006-02-16 Toray Ind Inc Hollow molded article and its production method
JP2010168027A (en) * 2008-09-29 2010-08-05 Toyoda Gosei Co Ltd Airbag door
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