JPS6121350Y2 - - Google Patents
Info
- Publication number
- JPS6121350Y2 JPS6121350Y2 JP1981095919U JP9591981U JPS6121350Y2 JP S6121350 Y2 JPS6121350 Y2 JP S6121350Y2 JP 1981095919 U JP1981095919 U JP 1981095919U JP 9591981 U JP9591981 U JP 9591981U JP S6121350 Y2 JPS6121350 Y2 JP S6121350Y2
- Authority
- JP
- Japan
- Prior art keywords
- wheel
- mounting body
- opening
- axial direction
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J13/00—Guards for chain, chain drive or equivalent drive, e.g. belt drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M2009/007—Guides to prevent chain from slipping off the sprocket
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Gear Transmission (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は自転車用フロントギヤ装置に関とす
る。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bicycle front gear device.
（従来の技術）
自転車用フロントギヤ装置は、従来、フロント
ギヤの外側方にチエーンガードが配備されて、該
チエーンガードの外側面に装飾用ホイールが固定
具により固定されることで構成されていた、しか
し、このような構造では、部品点数が多いため、
組立が困難であると共に、それだけ重量も増加す
ると云う問題があり、更に、製作コストが高くつ
くものである。(Prior Art) Conventionally, a front gear device for a bicycle has been configured such that a chain guard is provided on the outside of the front gear, and a decorative wheel is fixed to the outside surface of the chain guard using a fixture. ,However, such a structure has a large number of parts, so
There are problems in that it is difficult to assemble and the weight increases accordingly, and furthermore, the manufacturing cost is high.
（比較例）
そこで、本考案の比較例として、図面の第１図
及び第２図に示すものが考えられる。第１図にお
いて、１は鉄、アルミダイキヤスト、アルミ鍛造
等から成る金属製ペダルクランクで、その一端部
にヘツド軸部２が内側方に突設されており、該ヘ
ツド軸部２がクランク軸３の一端部に固設され
る。４はヘツド軸部２に固着されるフロントギヤ
装置で、第２図にも示すように、装飾用ホイール
５と、装着体６と、多数のリベツトにて示す固定
具７とから成る。装飾用ホイール５はチエーンガ
ード兼用とされるもので、アルミ、鉄等の金属か
ら成る円盤状とされ、その外側面には凹凸形状、
摸様、色彩等の装飾が施されている。ホイール５
はその内周部側がヘツド軸部２の内側端部に螺結
又はセレーシヨン結合されると共に、ヘツド軸部
２の内側端がかしめられることでヘツド軸部２に
固定されている。装着体６はプラスチツク材、あ
るいは鉄、アルミ等の金属材により環状に形成さ
れて、ホイール５の外周部の内側面側に同心状に
配置されている。装着体６の内周部側は周方向に
等配された固定具７によりホイール５に固設され
ている。装着体６の外周部側には、ギヤ及びイン
ナチエーンガード９がホイール５と同心状として
内側方に向つて上記の順で軸心方向に間隔をおい
て列設されている。ギヤ８はホイール５より小径
の環状とされ、ホイール５と軸心方向に間隔をお
いて対向している。インナチエーンガード９はホ
イール５と同径の環状とされ、断面略Ｌ型状とさ
れている。(Comparative Example) Therefore, as a comparative example of the present invention, what is shown in FIGS. 1 and 2 of the drawings can be considered. In Fig. 1, reference numeral 1 denotes a metal pedal crank made of iron, die-cast aluminum, forged aluminum, etc., with a head shaft 2 protruding inwardly from one end thereof. It is fixedly installed at one end of 3. Reference numeral 4 denotes a front gear device fixed to the head shaft portion 2, and as shown in FIG. 2, it is comprised of a decorative wheel 5, a mounting body 6, and a fixture 7 represented by a number of rivets. The decorative wheel 5 is said to double as a chain guard, and is in the shape of a disc made of metal such as aluminum or iron, and has an uneven shape on its outer surface.
It is decorated with patterns, colors, etc. wheel 5
The inner peripheral side of the head is screwed or serrated connected to the inner end of the head shaft 2, and the inner end of the head shaft 2 is fixed to the head shaft 2 by caulking. The mounting body 6 is formed in an annular shape from a plastic material or a metal material such as iron or aluminum, and is arranged concentrically on the inner side of the outer circumference of the wheel 5. The inner peripheral side of the mounting body 6 is fixed to the wheel 5 by fixing members 7 equally spaced in the circumferential direction. On the outer peripheral side of the mounting body 6, gears and an inner chain guard 9 are arranged concentrically with the wheel 5 and arranged inward in the above order at intervals in the axial direction. The gear 8 has an annular shape with a diameter smaller than that of the wheel 5, and faces the wheel 5 with an interval in the axial direction. The inner chain guard 9 has an annular shape with the same diameter as the wheel 5, and has a substantially L-shaped cross section.
上記比較例の構成によれば、装飾用ホイール５
がチエーンガードを兼用しているため、従来のよ
うにチエーンガードと装飾用ホイールの双方を必
要としたものよりは部品点数が削減できる。 According to the configuration of the above comparative example, the decorative wheel 5
Since the wheel doubles as a chain guard, the number of parts can be reduced compared to conventional models that require both a chain guard and a decorative wheel.
（考案が解決しようとする問題点）
比較例のものでも、複数の固定具７を必要と
し、しかも、ホイール５に装着体６を固設するの
に固定具７を用いた場合は、固定具７とホイール
５又は装着体６との間に僅かでも隙間があれば、
長期の使用によつてホイール５とギヤ８との間に
がた付きが生じてくる虞れもある。(Problem to be solved by the invention) Even in the comparative example, a plurality of fixtures 7 are required, and moreover, when the fixtures 7 are used to securely attach the mounting body 6 to the wheel 5, the fixtures If there is even a slight gap between 7 and the wheel 5 or mounting body 6,
There is also a possibility that rattling may occur between the wheel 5 and the gear 8 due to long-term use.
ホイール５と装着体６とを固設するのに、単に
固定具７を用いないようにするのであれば、ホイ
ール５に嵌合溝を設け、これに装着体６を嵌合す
ることも考えられるが、その場合でも、嵌合溝と
装着体１６との間に隙間を全くなくすことは不可
能であり、どうしてもがたつきが生じる。 If the fixing device 7 is not simply used to securely attach the wheel 5 and the mounting body 6, it is also possible to provide a fitting groove in the wheel 5 and fit the mounting body 6 into this. However, even in that case, it is impossible to eliminate any gap between the fitting groove and the mounting body 16, and looseness inevitably occurs.
そこで、装着体６とギヤ８とを合成樹脂で一体
成形し、装着体６でホイール５を内有するように
して両者５，６を固設することが考えられる。そ
の場合、ホイール５はチエーンガードを兼用する
ものであるため、その外周径はギヤ８の外周径よ
りも大径とする必要があるため、装着体６はその
外周径が不必要に大径とする必要のないことが好
ましい。 Therefore, it is conceivable to integrally mold the mounting body 6 and the gear 8 from synthetic resin, and fixing both 5 and 6 so that the mounting body 6 contains the wheel 5. In that case, since the wheel 5 also serves as a chain guard, its outer diameter needs to be larger than the outer diameter of the gear 8, so the attached body 6 has an unnecessarily large outer diameter. It is preferable that there is no need to do so.
本考案は上記に鑑み、装着体６とギヤ８とを合
成樹脂で一体に成形し、装着体６でホイール５を
内有することで両者５，６を堅固に固定できる自
転車用フロントギヤ装置であつて、装着体６の外
周径を不必要に大きくする必要のないものを提供
することを目的とする。 In view of the above, the present invention is a bicycle front gear device in which the mounting body 6 and the gear 8 are integrally molded from synthetic resin, and the mounting body 6 contains the wheel 5, thereby firmly fixing both 5 and 6. Therefore, it is an object of the present invention to provide a mounting body 6 that does not need to have an unnecessarily large outer circumferential diameter.
（問題点を解決するための手段）
本考案が、従来技術の問題点を解決し、その目
的を達成するために講じる技術的手段の特徴とす
るところは、クランク軸３側に固着されるチエー
ンガード兼用の装飾用ホイール５と、該ホイール
５外周よりその外周が小径の環状とされ且つホイ
ール５の内側面側に軸心方向に間隔をおいて同心
状に固設されたギヤ８とを備えた自転車用フロン
トギヤ装置において、ホイール５の外周よりも径
方向内方位置で且つ周方向に間隔をおいた複数位
置から、切出し部１０が内側面側に切起こされる
と共に、その切起こしによつてホイール５に開口
１１が形成され、切出し部１０は開口１１と軸方
向に対向するものとされ、環状の合成樹脂製の装
着体６が、切出し部１０を軸方向内外から狭着す
るように内有すると共に前記開口１１に充填され
ることによりホイール５に固設され、該装着体６
に前記ギヤ８が一体的に形成されている点にあ
る。(Means for Solving the Problems) The present invention solves the problems of the prior art and is characterized by the technical means taken to achieve its purpose. It is equipped with a decorative wheel 5 which also serves as a guard, and a gear 8 which has an annular shape whose outer periphery is smaller in diameter than the outer periphery of the wheel 5 and which is fixed concentrically to the inner surface of the wheel 5 at intervals in the axial direction. In the bicycle front gear device, the cutout portions 10 are cut and raised toward the inner side from a plurality of positions spaced apart in the radial direction from the outer circumference of the wheel 5, and the cutout portions 10 are cut and raised toward the inner surface side from a plurality of positions that are radially inward from the outer circumference of the wheel 5 and spaced apart in the circumferential direction. An opening 11 is formed in the wheel 5, and the cutout part 10 is arranged to face the opening 11 in the axial direction, and the annular synthetic resin attachment body 6 narrowly attaches the cutout part 10 from the inside and outside in the axial direction. The mounting body 6 is fixed to the wheel 5 by being contained therein and filling the opening 11.
The point is that the gear 8 is integrally formed.
（作 用）
装着体６がホイール５の開口１１に充填される
ことで、装着体６とホイール５との相対的な径方
向移動は規制される。さらに、切出し部１０は開
口１１と軸方向に対向するもので、この切出し部
１０を装着体６は軸方向内外から狭着するように
内有することで装着体６とホイール５との相対的
な軸方向移動が規制され、これにより、装着体６
はホイール５に固設される。(Function) By filling the opening 11 of the wheel 5 with the mounting body 6, relative radial movement between the mounting body 6 and the wheel 5 is restricted. Further, the cut-out portion 10 faces the opening 11 in the axial direction, and by having the cut-out portion 10 inside the mounting body 6 so as to narrowly attach it from the inside and outside in the axial direction, the relative relationship between the mounting body 6 and the wheel 5 is reduced. The axial movement is regulated, and as a result, the attached body 6
is fixed to the wheel 5.
また、切出し部１０はホイール５の外周むりも
径方向内方位置で且つ周方向に間隔をおいた複数
位置から切起こされると共に、その切起こしによ
り開口１０が形成されたものであるため、装着体
６はホイール５の外周径よりも小径のものであつ
ても、ホイール５に固設可能である。 In addition, the cut-out portion 10 is cut and raised from a plurality of positions spaced apart in the radial direction from the outer circumference of the wheel 5, and the opening 10 is formed by the cut-and-raised portion. Even if the body 6 has a smaller diameter than the outer peripheral diameter of the wheel 5, it can be fixed to the wheel 5.
（実施例）
以下、本考案の実施例を図面に基づき説明す
る。なお、比較例と同一部分の説明は省略する。(Example) Hereinafter, an example of the present invention will be described based on the drawings. Note that description of the same parts as those in the comparative example will be omitted.
第３図において、１０は切出し部であつて、ホ
イール５の外周よりも径方向内方位置で、周方向
等間隔の多数の箇所が内側面側に切起こされて形
成されたものである。該切出し部１０は下方に突
出する倒立Ｌ型状とされている。 In FIG. 3, reference numeral 10 denotes a cut-out portion, which is formed by cutting and raising a number of portions at equal intervals in the circumferential direction at positions radially inward from the outer periphery of the wheel 5 toward the inner side. The cutout portion 10 has an inverted L shape that projects downward.
１１はホイール５に形成された開口で、ホイー
ル５から切出し部１０が切起こされることにより
形成されたものであり、切出し部１０は開口１１
と軸方向に対向する。 Reference numeral 11 denotes an opening formed in the wheel 5, which is formed by cutting and raising a cutout part 10 from the wheel 5, and the cutout part 10 is formed in the opening 11.
axially opposite.
そして装着体６は合成樹脂製であり、切出し部
１０を軸方向内外から内有すると共に開口１１に
充填されることによりホイール５に固設されてい
る。該装着体６にホイール５外周径より小径のギ
ヤ８とインナチエーンガード９とが一体的に形成
されている。他の構成は前記比較例と同様であ
る。 The mounting body 6 is made of synthetic resin, has cut-out portions 10 inside it from the inside and outside in the axial direction, and is fixed to the wheel 5 by filling the opening 11. A gear 8 having a smaller diameter than the outer peripheral diameter of the wheel 5 and an inner chain guard 9 are integrally formed on the mounting body 6. The other configurations are the same as those of the comparative example.
これにより、装着体６は開口１１に充填される
ことでホイール５に対する相対的な径方向移動が
規制され、切出し部１０を軸方向内外から狭着す
ることでホイール５に対する相対的な軸方向移動
が規制され、ホイール５にがたつきなく固設され
ている。 As a result, the mounting body 6 is prevented from moving in the radial direction relative to the wheel 5 by filling the opening 11, and by narrowly fitting the cutout portion 10 from the inside and outside in the axial direction, the mounting body 6 is moved relative to the wheel 5 in the axial direction. is regulated and is fixed to the wheel 5 without rattling.
また、装着体６は、ホイール５の外周よりも径
方向内方位置でホイール５に固設されており、チ
エーンガードを兼用するためにギヤ８よりも大径
でなければならないホイール５外周径に対し、不
必要にその外周径を大径とする必要のないものと
されている。 The mounting body 6 is fixed to the wheel 5 at a position radially inward from the outer circumference of the wheel 5, and the outer circumference of the wheel 5 must be larger than the gear 8 in order to serve as a chain guard. On the other hand, there is no need to unnecessarily increase the outer circumferential diameter.
（考案の効果）
本考案によれば、ホイールの開口への装着体の
充填により、ホイールと装着体の相対的な径方向
移動が規制され、装着体が切出し部を軸方向内外
から狭着状とすることでホイールと装着体の相対
的な軸方向移動が規制され、これにより、装着体
をホイールにがたつきなく、しかも何らの固定具
も不要として固設できる。(Effects of the invention) According to the invention, by filling the opening of the wheel with the mounting body, the relative radial movement between the wheel and the mounting body is regulated, and the mounting body narrows the cut-out portion from the inside and outside in the axial direction. This restricts relative axial movement between the wheel and the mounting body, and thereby the mounting body can be fixed to the wheel without rattling and without the need for any fixing tools.
さらに、装着体に一体成形されるギヤよりも大
径のチエーンガード兼用のホイールに対し、装着
体はホイールの外径よりも径方向内方位置でホイ
ールに固設されることとなり、ギヤが一体に成形
される装着体を不必要に大径とする必要がなく、
チエーンガードと装飾用ホイールとを兼用させた
自転車用フロントギヤ装置にとつては極めて好ま
しいものである。 Furthermore, for wheels that also serve as a chain guard and have a larger diameter than the gear that is integrally molded on the mounting body, the mounting body is fixed to the wheel at a position radially inward from the outer diameter of the wheel, so that the gear is integrally molded. There is no need to make the attached body formed into an unnecessarily large diameter,
This is extremely preferable for a bicycle front gear device that serves both as a chain guard and a decorative wheel.
第１図は本考案の比較例に係る断面図、第２図
は同要部斜視図、第３図は本考案の実施例に係る
要部断面図である。
３……クランク軸、５……ホイール、６……装
着体、８……ギヤ、１０……切出し部、１１……
開口。
FIG. 1 is a cross-sectional view of a comparative example of the present invention, FIG. 2 is a perspective view of the same, and FIG. 3 is a cross-sectional view of the main part of an embodiment of the present invention. 3... Crankshaft, 5... Wheel, 6... Mounted body, 8... Gear, 10... Cutout part, 11...
Opening.
Claims (1)
用の装飾用ホイール５と、該ホイール５外周より
その外周が小径の環状とされ且つホイール５の内
側面側に軸心方向に間隔をおいて同心状に固設さ
れたギヤ８とを備えた自転車用フロントギヤ装置
において、ホイール５の外周よりも径方向内方位
置で且つ周方向に間隔をおいた複数位置から、切
出し部１０が内側面側に切起こされると共に、そ
の切起こしによつてホイール５に開口１１が形成
され、切出し部１０は開口１１と軸方向に対向す
るものとされ、環状の合成樹脂製の装着体６が、
切出し部１０を軸方向内外から狭着するように内
有すると共に前記開口１１に充填されることによ
りホイール５に固設され、該装着体６に前記ギヤ
８が一体的に形成されていることを特徴とする自
転車用フロントギヤ装置。 A decorative wheel 5 that also serves as a chain guard is fixed to the crankshaft 3 side, and the outer periphery of the wheel 5 is annular with a smaller diameter than the outer periphery of the wheel 5, and is concentrically arranged on the inner side of the wheel 5 at intervals in the axial direction. In a bicycle front gear device having a fixed gear 8, the cutout portions 10 are cut toward the inner side from a plurality of positions spaced apart in the circumferential direction from a position radially inward from the outer periphery of the wheel 5. When raised, an opening 11 is formed in the wheel 5 by the cutting and raising, and the cutout part 10 faces the opening 11 in the axial direction, and the annular synthetic resin mounting body 6 is
It is noted that the cut-out portion 10 is provided inside so as to be narrowly attached from the inside and outside in the axial direction, and the opening 11 is filled to be fixed to the wheel 5, and the gear 8 is integrally formed with the mounting body 6. Features a front gear device for bicycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981095919U JPS5892U (en) | 1981-06-25 | 1981-06-25 | Bicycle front gear device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981095919U JPS5892U (en) | 1981-06-25 | 1981-06-25 | Bicycle front gear device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5892U JPS5892U (en) | 1983-01-05 |
| JPS6121350Y2 true JPS6121350Y2 (en) | 1986-06-26 |
Family
ID=29890807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981095919U Granted JPS5892U (en) | 1981-06-25 | 1981-06-25 | Bicycle front gear device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5892U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL72661A (en) * | 1983-12-05 | 1989-10-31 | Harris Arthur M | Precision reagent metering and delivery device |
-
1981
- 1981-06-25 JP JP1981095919U patent/JPS5892U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5892U (en) | 1983-01-05 |
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