JPS6159807B2 - - Google Patents
Info
- Publication number
- JPS6159807B2 JPS6159807B2 JP9111581A JP9111581A JPS6159807B2 JP S6159807 B2 JPS6159807 B2 JP S6159807B2 JP 9111581 A JP9111581 A JP 9111581A JP 9111581 A JP9111581 A JP 9111581A JP S6159807 B2 JPS6159807 B2 JP S6159807B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- gear
- crank
- band
- adapter
- 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
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 238000004804 winding Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Description
【発明の詳細な説明】
本発明は自転車用ギヤクランクの製造方法、詳
しくはクランクにアダプターを介してギヤを取付
けて成る自転車用ギヤクランクの製造方法に関す
るもので、目的とする処は、１枚の金属板から前
記ギヤを打抜いて形成するとき、そのギヤ打抜き
のトリミングを合理的に行なうことができて、材
料の無駄を少なくし、製造コストの低減を計り得
るギヤクランクの製造方法を提供する点にある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a bicycle gear crank, and more particularly, to a method for manufacturing a bicycle gear crank in which a gear is attached to the crank via an adapter. To provide a method for manufacturing a gear crank, in which when the gear is punched out from a metal plate, trimming of the punched gear can be rationally performed, thereby reducing waste of materials and reducing manufacturing costs. It is in the point of doing.
一般にこの種ギヤクランクのチエンギヤは、鉄
板或いは合金板などの金属板を環状に打抜いて形
成されているため、１枚の金属板から環状のチエ
ンギヤを形成するとき、トリミングを合理的に行
なうことができなくて、材料の無駄が非常に多
く、製造コストが高くつく問題があつた。 Generally, the chain gear of this type of gear crank is formed by punching a metal plate such as an iron plate or an alloy plate into an annular shape, so when forming an annular chain gear from a single metal plate, trimming must be done rationally. This resulted in problems such as a large amount of wasted material and high manufacturing costs.
本発明は以上の点に鑑みて発明したもので、剛
性をもつ金属板から所定長さの帯状板を打抜きに
より成形すると共に、この成形時、帯状板の軸方
向一側に、長さ方向に連続する多数の歯を同時に
打抜き成形し、次いでこの帯状板を各歯を形成し
た幅方向一側が半径方向外向きになり、幅方向他
側が半径方向内向きになるごとく環状に巻回し、
然る後前記帯状板の各端部を互に連結すると共
に、この帯状板を前記アダプターに、帯状板の巻
回中心がクランクの軸芯に合致するごとく固定し
て、自転車用ギヤクランクを製造するごとくした
ものである。 The present invention was invented in view of the above points, and includes forming a band-like plate of a predetermined length from a rigid metal plate by punching, and at the time of forming, a band-like plate is formed on one side in the axial direction of the band-like plate in the length direction. A large number of consecutive teeth are stamped and formed at the same time, and then this band-shaped plate is wound in an annular shape so that one side in the width direction on which each tooth is formed faces radially outward, and the other side in the width direction faces radially inward.
After that, each end of the strip plate is connected to each other, and the strip plate is fixed to the adapter so that the winding center of the strip plate matches the axis of the crank, thereby producing a bicycle gear crank. It was a great accomplishment.
先ず本発明方法により製造される自転車用ギヤ
クランクの構造を図面に基づいて説明する。 First, the structure of a bicycle gear crank manufactured by the method of the present invention will be explained based on the drawings.
第１図において１はクランク軸で、該クランク
軸１の軸方向一端外周に多数の凹凸条をもつテー
パー状の嵌合部１１と、球受面１２をもつた径大
部１３とを設けると共に、前記嵌合部１１と径大
部１３との間に段部１４を設け、また軸方向他端
外周に多数の凹凸条をもつテーパー状の嵌合部１
５とねじ部１６とを設けて、前記嵌合部１１，１
５にクランクアーム２，３を挿嵌すると共に、前
記ねじ部１６に球受面４ａをもつ球押し４を螺着
する一方、クランク軸１の軸端中心部にねじ孔１
７，１７を設け、このねじ孔１７，１７に螺合す
る頭付ボルト５，５により前記クランクアーム
２，３をクランク軸１に対し回転不能に固定する
のである。 In FIG. 1, reference numeral 1 denotes a crankshaft, and the crankshaft 1 has a tapered fitting part 11 with a large number of uneven stripes on the outer periphery of one end in the axial direction, and a large-diameter part 13 with a ball-receiving surface 12. , a tapered fitting part 1 having a stepped part 14 between the fitting part 11 and the large diameter part 13, and having a large number of uneven stripes on the outer periphery of the other end in the axial direction.
5 and a threaded portion 16, the fitting portions 11, 1
At the same time, a ball pusher 4 having a ball receiving surface 4a is screwed into the threaded portion 16, and a threaded hole 1 is inserted into the center of the shaft end of the crankshaft 1.
7, 17 are provided, and the crank arms 2, 3 are fixed non-rotatably to the crankshaft 1 by head bolts 5, 5 which are screwed into these screw holes 17, 17.
６は前記クランク軸１の嵌合部１１より大径な
外周をもつ筒状体で、この筒状体の内周に、前記
嵌合部１１の凹凸条に嵌合する多数の凹凸条６１
を形成すると共に、外周に多数の凹凸条６２を設
けて、この筒状体６の中心孔部分を前記嵌合部１
１に挿嵌したクランク軸１に対し回転不能に取付
けるのである。 Reference numeral 6 denotes a cylindrical body having an outer periphery larger than that of the fitting portion 11 of the crankshaft 1, and a large number of uneven stripes 61 that fit into the uneven stripes of the fitting portion 11 are provided on the inner periphery of this cylindrical body.
At the same time, a large number of uneven stripes 62 are provided on the outer periphery, and the center hole portion of this cylindrical body 6 is connected to the fitting portion 1.
It is mounted so that it cannot rotate with respect to the crankshaft 1 that is inserted into the crankshaft 1.
７はこの筒状体６を介して前記クランク軸１に
取付けるアダプターで、アルミニウムなどの軽量
材から成り、このアダプター７を、前記筒状体６
の外周に嵌合する嵌合孔７１をもつボス部７２
と、該ボス部７２から放射方向に延出する複数本
の支持アーム７３とにより形成し、前記嵌合孔７
１内周に、前記筒状体６の凹凸条６２に嵌合する
凹凸条を形成して、アダプター７を、筒状体６を
介してクランク軸１に対し回転不能に取付ける一
方、前記各支持アーム７３にギヤ取付部７４を形
成すると共に、一つの取付部７４にねじ孔７６を
形成する。またこのギヤ取付部７４の厚さ方向一
側面を切欠いて、後記するチエンギヤ８の係合突
起８６が係合する切欠部７５を形成する。この切
欠部７５はその幅を係合突起８６の肉厚と同一又
は僅かに小さくして、該切欠部７５に係合突起８
６を係合させたとき、第２図に示す如く係合突起
８６の段部８６ｃをギヤ取付部７４の側縁に接当
させて、チエンギヤ８の周方向への自由な移動と
軸方向への自由な移動とを阻止すべくしている。
尚図中７７は前記各支持アーム７３に形成した別
のギヤ取付部で、前記ギヤ取付部７４と同一構造
とされている。 Reference numeral 7 denotes an adapter that is attached to the crankshaft 1 through the cylindrical body 6, and is made of a lightweight material such as aluminum.
A boss portion 72 having a fitting hole 71 that fits into the outer periphery of the
and a plurality of support arms 73 extending radially from the boss portion 72, and the fitting hole 7
The adapter 7 is non-rotatably attached to the crankshaft 1 via the cylindrical body 6 by forming a concavo-convex strip on the inner periphery thereof to fit into the concave-convex strip 62 of the cylindrical body 6. A gear attachment portion 74 is formed on the arm 73, and a screw hole 76 is formed in one attachment portion 74. Further, one side surface in the thickness direction of this gear attachment portion 74 is cut out to form a notch portion 75 that engages with an engagement protrusion 86 of a chain gear 8, which will be described later. This notch 75 has a width that is equal to or slightly smaller than the thickness of the engaging protrusion 86 so that the engaging protrusion 8
6 is engaged, the stepped portion 86c of the engagement protrusion 86 comes into contact with the side edge of the gear attachment portion 74 as shown in FIG. The aim is to prevent the free movement of people.
In the figure, reference numeral 77 denotes another gear attachment portion formed on each of the support arms 73, which has the same structure as the gear attachment portion 74.
８，１０は前記アダプター７のギヤ取付部７
４，７７に取付けられるチエンギヤである。 8 and 10 are gear attachment parts 7 of the adapter 7.
This is a chain gear attached to 4,77.
尚図中７８は前記アダプター７の各支持アーム
７３先端を連結する環状のチエンガードで、この
チエンガード７８は、前記各支持アーム７３の先
端を、段部７９を介して外方に延長して形成する
のである。９０はハンガー９１，９２はこのハン
ガーの両端に螺着する椀であつて、この椀９１，
９２に設けられる球受面と前記クランク軸１の球
受面１２及び球押し４の球受面４ａとの間に介装
する球体９３によりクランク軸１をハンガー９０
に対し回転自由に支持するのである。 In the figure, reference numeral 78 denotes an annular chain guard that connects the tips of the support arms 73 of the adapter 7, and the chain guard 78 is formed by extending the tips of the support arms 73 outward through step portions 79. It is. 90 is a bowl that is screwed onto both ends of the hanger 91, 92;
The crankshaft 1 is attached to the hanger 90 by a ball 93 interposed between the ball receiving surface provided on the crankshaft 92 and the ball receiving surface 12 of the crankshaft 1 and the ball receiving surface 4a of the ball pusher 4.
It is supported so that it can rotate freely.
尚以上説明した自転車用ギヤクランクは、アダ
プター７を、筒体６を介してクランク軸１に取付
けたものであるが、このアダプター７は前記クラ
ンク軸１に直接挿嵌して取付けてもよいし、又ク
ランクアーム２に取付けるか或いは該クランクア
ーム２と一体に形成してもよい。 The bicycle gear crank described above has the adapter 7 attached to the crankshaft 1 via the cylinder 6, but the adapter 7 may be attached by being directly inserted into the crankshaft 1. Alternatively, it may be attached to the crank arm 2 or formed integrally with the crank arm 2.
しかして本発明は以上の如き構造をもつ自転車
用ギヤクランクにおいて、前記チエンギヤ８，１
０を以下の如き成形方法により形成するのであ
る。尚チエンギヤ８，１０の各成形方法は同一で
あるから、チエンギヤ８の成形方法についてのみ
説明する。 Therefore, the present invention provides a bicycle gear crank having the above structure, in which the chain gears 8, 1
0 is formed by the following molding method. Incidentally, since the method of molding each of the chain gears 8 and 10 is the same, only the method of molding the chain gear 8 will be described.
先ず鉄板或いは合金板など剛性のある金属板を
プレスにより所定長さの帯状に打抜き成形すると
共に、このプレス時幅方向一側に、長さ方向に連
続する多数の歯８１を、また他側に、突出部８６
ａと該突出部８６ａの一端で更に突出する膨出部
８６ｂとこの突出部８６ａ膨出部８６ｂ間で形成
される段部８６ｃとから成る段付係合突起８６を
複数個同時に打抜き成形し、以つて第３図に示す
如くチエンギヤ８の中間素材となる帯状板８ａを
形成する。 First, a rigid metal plate such as an iron plate or an alloy plate is stamped into a belt shape of a predetermined length using a press, and during this pressing, a large number of teeth 81 that are continuous in the length direction are formed on one side in the width direction, and on the other side. , protrusion 86
a, a bulge 86b further protruding at one end of the protrusion 86a, and a step 86c formed between the protrusion 86a and the bulge 86b. Then, as shown in FIG. 3, a band-shaped plate 8a, which will become the intermediate material of the chain gear 8, is formed.
次いで前記帯状板８ａを各歯８１を形成した幅
方向一側が半径方向外向きになり、幅方向他側が
半径方向内向きになるごとく環状に巻回し、かつ
その巻回端部を互に連結すると共に、前記アダプ
ター７の取付部７４に、帯状板８ａの巻回中心が
前記クランク軸１の中心に合致するよう固定する
のである。 Next, the band-shaped plate 8a is wound in an annular shape so that one side in the width direction on which each tooth 81 is formed faces outward in the radial direction, and the other side in the width direction faces inward in the radial direction, and the wound ends are connected to each other. At the same time, the belt-shaped plate 8a is fixed to the mounting portion 74 of the adapter 7 so that the winding center of the band-shaped plate 8a coincides with the center of the crankshaft 1.
しかして前記の如き成形方法により形成したギ
ヤ８のアダプター７への固定は、前記帯状板８ａ
の巻回端部一端に、帯状板の肉厚相当分の段部８
２を介して外方に突出する取付片８３を設けると
共に、この取付片８３と、前記帯状板の巻回他端
部とに取付孔８４，８５を設け、これら取付孔８
４，８５に螺子体９を挿入して帯状板８ａの巻回
端部を連結する一方、チエンギヤ８の係合突起８
６，８６間における内周面部分を前記ギヤ取付部
７４に位置させた状態で前記ギヤ８を、該ギヤの
逆回転方向（第２図矢印Ｘ方向）に回動して、係
合突起８６を切欠部７５に係合させると共に、前
記螺子体９の先端部をギヤ取付部７４のねじ孔７
６に螺合することにより行なうのである。 Therefore, fixing the gear 8 formed by the above-described molding method to the adapter 7 is performed using the band-shaped plate 8a.
At one end of the winding end, there is a stepped portion 8 corresponding to the thickness of the strip plate.
A mounting piece 83 is provided that protrudes outward through the strip plate 2, and mounting holes 84 and 85 are provided in this mounting piece 83 and the other winding end of the strip plate.
4 and 85 to connect the winding ends of the strip plate 8a, while the engagement protrusion 8 of the chain gear 8
With the inner circumferential surface portion between 6 and 86 located in the gear mounting portion 74, the gear 8 is rotated in the reverse rotation direction of the gear (in the direction of arrow X in FIG. 2), and the engagement protrusion 86 is engaged with the notch 75, and the tip of the screw body 9 is inserted into the screw hole 7 of the gear attachment portion 74.
This is done by screwing into 6.
尚前記チエンギヤ８のアダプター７への固定手
段として、帯状板８ａの巻回端部を重ね合わせる
ことなく、該巻回端部に取付孔を設けて、これら
取付孔のそれぞれに螺子体を挿通して、該螺子体
を前記ギヤ取付部７４に螺着するようにしてもよ
いし、又相対向する２つの突起をもつ連結板を形
成し、この連結板の前記突起間に貫通孔を設け
て、前記突起を帯状板の巻回端部における各取付
孔に挿嵌すると共に、連結板の貫通孔に螺子体を
挿通して、該螺子体を前記ギヤ取付部７４に螺着
するようにしてもよい。 As a means for fixing the chain gear 8 to the adapter 7, mounting holes are provided at the winding ends of the strip plate 8a without overlapping them, and screws are inserted into each of these mounting holes. Then, the screw body may be screwed into the gear attachment portion 74, or a connecting plate having two opposing protrusions may be formed, and a through hole may be provided between the protrusions of this connecting plate. , by inserting the protrusions into each attachment hole at the winding end of the band plate, and inserting a screw body into the through hole of the connecting plate, and screwing the screw body into the gear attachment part 74. Good too.
以上の如く本発明は、軸方向一側に連続する多
数の歯をもつた帯状板を成形して、この帯状板
を、前記各歯を形成した幅方向一側が半径方向外
向きになり、幅方向他側が半径方向内向きになる
ごとく環状に巻回して、この帯状板をアダプター
に、その巻回中心がクランク軸の軸芯に合致する
ごとく固定したから、換言すると帯状板を打抜く
と同時にギヤを形成する工程と、環状に巻回する
工程と、環状に巻回する工程およびアダプターに
芯出し固定する工程を有機的、かつ、合理的に結
合したのであるから、自転車用ギヤクランクの形
成が著しく作業能率を高くすることができ、しか
も、チエンギヤを形成するに際し、帯状板を巻回
して形成するから、素材に対するトリミングを合
理的に行なえて、材料の無駄が非常に少なく、製
造コストを大幅に低減できるのである。 As described above, the present invention forms a band-shaped plate having a large number of continuous teeth on one side in the axial direction, and one side in the width direction on which each tooth is formed faces outward in the radial direction, and the width of the band-shaped plate is The strip plate was wound in an annular shape with the other side facing inward in the radial direction, and the strip plate was fixed to the adapter so that the center of the winding coincided with the axis of the crankshaft.In other words, the strip plate was punched out at the same time. The process of forming the gear, the process of winding it in an annular shape, the process of winding it in an annular shape, and the process of centering and fixing it to the adapter are organically and rationally combined, so the formation of a bicycle gear crank is possible. In addition, since the chain gear is formed by winding a strip, material can be trimmed rationally, resulting in very little wasted material and reduced manufacturing costs. This can be significantly reduced.
図面は本発明方法により製造された自転車用ギ
ヤクランクを示すもので、第１図は一部切欠正面
図、第２図は部分側面図、第３図は帯状板の平面
図、第４図はギヤの部分斜視図、第５図は第２図
―線断面図、第６図はギヤの部分側面図、第
７図及び第８図はアダプターの部分斜視図であ
る。
１…クランク軸、７…アダプター、８…ギヤ、
８１…歯、８ａ…帯状板。
The drawings show a bicycle gear crank manufactured by the method of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a partially cutaway side view, Fig. 3 is a plan view of a strip plate, and Fig. 4 is a partially cutaway front view. FIG. 5 is a partial perspective view of the gear, FIG. 5 is a sectional view taken along the line of FIG. 2, FIG. 6 is a partial side view of the gear, and FIGS. 7 and 8 are partial perspective views of the adapter. 1...Crankshaft, 7...Adapter, 8...Gear,
81...teeth, 8a...band plate.
Claims (1)
て成る自転車用ギヤクランクにおいて、剛性をも
つ金属板から所定長さの帯状板を打抜きにより成
形すると共に、この成形時、帯状板の幅方向一側
に、長さ方向に連続する多数の歯を同時に打抜き
成形し、次いでこの帯状板を、各歯を形成した幅
方向一側が半径方向外向きになり、幅方向他側が
半径方向内向きになるごとく環状に巻回し、然る
後前記帯状板の各端部を互に連結すると共に、こ
の帯状板を前記アダプターに、帯状板の巻回中心
がクランクの軸芯に合致するごとく固定したこと
を特徴とする自転車用ギヤクランクの製造方法。1. In a bicycle gear crank in which a gear is attached to the crank via an adapter, a band-shaped plate of a predetermined length is formed from a rigid metal plate by punching, and at the time of this forming, on one side in the width direction of the band-shaped plate, A large number of teeth that are continuous in the length direction are simultaneously stamped and formed, and then this strip plate is formed into an annular shape so that one side in the width direction where each tooth is formed faces radially outward and the other side in the width direction faces radially inward. The belt-like plate is wound, and then each end of the belt-like plate is connected to each other, and the belt-like plate is fixed to the adapter so that the winding center of the band-like plate coincides with the axis of the crank. How to manufacture bicycle gear cranks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9111581A JPS5744438A (en) | 1981-06-11 | 1981-06-11 | Manufacture of gear crank of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9111581A JPS5744438A (en) | 1981-06-11 | 1981-06-11 | Manufacture of gear crank of bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744438A JPS5744438A (en) | 1982-03-12 |
| JPS6159807B2 true JPS6159807B2 (en) | 1986-12-18 |
Family
ID=14017512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9111581A Granted JPS5744438A (en) | 1981-06-11 | 1981-06-11 | Manufacture of gear crank of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5744438A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02129987U (en) * | 1989-03-31 | 1990-10-26 | ||
| DE19757186A1 (en) * | 1997-12-22 | 1999-06-24 | Schaeffler Waelzlager Ohg | Manufacturing hollow cylindrical internal and external gears |
| JP2005053410A (en) * | 2003-08-07 | 2005-03-03 | Shimano Inc | Sprocket for bicycle |
-
1981
- 1981-06-11 JP JP9111581A patent/JPS5744438A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5744438A (en) | 1982-03-12 |
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