JPH0314473Y2 - - Google Patents
Info
- Publication number
- JPH0314473Y2 JPH0314473Y2 JP1986150671U JP15067186U JPH0314473Y2 JP H0314473 Y2 JPH0314473 Y2 JP H0314473Y2 JP 1986150671 U JP1986150671 U JP 1986150671U JP 15067186 U JP15067186 U JP 15067186U JP H0314473 Y2 JPH0314473 Y2 JP H0314473Y2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- toothed
- idler roller
- pulley
- toothed pulley
- 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
- 238000005452 bending Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- RSMUVYRMZCOLBH-UHFFFAOYSA-N metsulfuron methyl Chemical compound COC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)NC1=NC(C)=NC(OC)=N1 RSMUVYRMZCOLBH-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004804 winding Methods 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0874—Two or more finally actuated members
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、歯付ベルトにより駆動する自転車の
ベルトのテンシヨナ（緊張装置）に関するもので
ある。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bicycle belt tensioner driven by a toothed belt.
従来技術及びその問題点
自転車の駆動チエーンの代りに歯付ベルトを用
いた場合、歯付ベルトは駆動時に伸びて戻り側が
弛むため、後輪プーリにおいてベルト歯がプーリ
歯に乗り上げて歯飛びを生じる。かかる歯飛びを
防止するため、歯付ベルトの初張力を充分に高く
とることは、回転抵抗が増大して実用にならな
い。これがため、歯付ベルトの戻り側の後輪プー
リ直前にベルト緊張用ローラを圧接させる案があ
るが、実験の結果から見てこれは到底不充分であ
る。Prior art and its problems When a toothed belt is used in place of a bicycle drive chain, the toothed belt stretches during driving and loosens on the return side, causing the belt teeth to ride on the pulley teeth on the rear wheel pulley, causing tooth skipping. . In order to prevent such tooth skipping, setting the initial tension of the toothed belt sufficiently high increases rotational resistance and is not practical. For this reason, there has been a proposal to press a belt tensioning roller just before the rear wheel pulley on the return side of the toothed belt, but this is completely inadequate based on the results of experiments.
現在実用化されている対策の１つは、特公昭58
−47592号公報に開示されているように、クラン
クペダルを固定した駆動プーリを歯車とし、これ
に噛合する内歯車の外周と後輪プーリとの間に歯
付ベルトを掛け、ペダルの回転力によつて内歯車
が前方に変位されることによつて歯付ベルトの戻
り側をも緊張させる構造である。しかしながら、
この構造は複雑で高価となる欠点がある。 One of the measures currently in practical use is
As disclosed in Publication No. 47592, a drive pulley to which a crank pedal is fixed is used as a gear, and a toothed belt is hung between the outer circumference of an internal gear that meshes with the drive pulley and the rear wheel pulley, and a toothed belt is applied to the rotational force of the pedal. Therefore, the structure is such that when the internal gear is displaced forward, the return side of the toothed belt is also tensed. however,
This structure has the disadvantage of being complicated and expensive.
一方、実開昭56−39649号に類似の方式も実用
化されているが、これはベルトを２個所で背面か
ら曲げてたるみを取る方式であるため、ベルトが
屈曲疲労しやすいという欠点があつた。すなわ
ち、歯付ベルト本来のプーリに対する巻掛による
屈曲とは逆方向に２回折り曲げられることにな
り、屈曲の程度、回数が非常に多くなる結果とな
る。 On the other hand, a method similar to Utility Model Application Publication No. 56-39649 has also been put into practical use, but this method involves bending the belt from the back at two places to take up the slack, which has the disadvantage that the belt is prone to bending fatigue. Ta. That is, the toothed belt is bent twice in the opposite direction to the original bending caused by winding around the pulley, resulting in an extremely large number of bends.
問題点を解決するための手段
本考案は、フレームに支持される軸を中心とし
て回動自在に設けられたアームの一端にアイドラ
ローラを、他端に歯付プーリを有し、前記アイド
ラローラは張り側ベルトの背面または弛み側ベル
トの背面に接し、前記歯付プーリは弛み側ベルト
の歯面または張り側ベルトの歯面に接するように
する構成により前記問題点を解決した。Means for Solving the Problems The present invention has an idler roller at one end of an arm that is rotatable about an axis supported by a frame, and a toothed pulley at the other end, and the idler roller is provided with a toothed pulley at the other end. The above problem has been solved by a configuration in which the toothed pulley is in contact with the back surface of the tight side belt or the back surface of the slack side belt, and the toothed pulley is in contact with the tooth surface of the slack side belt or the tooth surface of the tight side belt.
作 用
ベルトに弛みがないように前後のプーリの軸間
を調整したとき張り側のベルト及び弛み側のベル
トが夫々アイドラローラまたは歯付プーリにより
僅かに屈曲するように設定する。Function: When the axes of the front and rear pulleys are adjusted so that there is no slack in the belt, the belt on the tight side and the belt on the slack side are set so that they are bent slightly by the idler roller or toothed pulley, respectively.
ベルトに駆動力が働くと張り側ベルトに弾性伸
びを生じて弛み側ベルトがたるもうとするが、張
り側ベルトに働く張力により張り側ベルトは真直
ぐになろうとする。従つて、張り側ベルトが張り
側にあるアイドラローラを押し上げるかまたは歯
付プーリを押し下げることになる。 When a driving force is applied to the belt, the tension side belt is elastically stretched and the slack side belt tends to sag, but the tension side belt tends to straighten due to the tension acting on the tension side belt. Therefore, the tension side belt will either push up the idler roller on the tension side or push down the toothed pulley.
この動きがアームを介して弛み側ベルトの側に
ある歯付プーリを押し下げるかまたはアイドラロ
ーラを押し上げるのでこれにより弛み側ベルトの
たるみが取られる。 This movement, via the arm, pushes down the toothed pulley on the side of the slack belt or pushes up the idler roller, thereby taking up the slack in the slack belt.
実施例
第１図において、１は自転車のフレーム、２は
駆動プーリ、３は後輪プーリ、４は歯付ベルト、
５はアーム軸、６はアーム、７はアイドラロー
ラ、８はアイドラローラ軸、９は歯付プーリ、１
０は歯付プーリ軸である。Embodiment In Fig. 1, 1 is a bicycle frame, 2 is a drive pulley, 3 is a rear wheel pulley, 4 is a toothed belt,
5 is an arm shaft, 6 is an arm, 7 is an idler roller, 8 is an idler roller shaft, 9 is a toothed pulley, 1
0 is the toothed pulley shaft.
アイドラローラ７は張り側ベルト４ａの背面に
接し、歯付プーリ９は弛み側ベルト４ｂの歯面に
接している。 The idler roller 7 is in contact with the back surface of the tight side belt 4a, and the toothed pulley 9 is in contact with the toothed surface of the slack side belt 4b.
第２図、第３図において、１ａはフレーム、１
ｂはフレームに取付けられる軸受であり、この中
でボルト５ａ、ナツト５ｃ及びブシユ５ｂで構成
されるアーム軸５が回転可能な構造となつてい
る。 In Figures 2 and 3, 1a is a frame, 1
Reference numeral b denotes a bearing attached to the frame, in which an arm shaft 5 consisting of a bolt 5a, a nut 5c, and a bush 5b is rotatable.
なお、第３図の符号９′は歯付プーリ９のフラ
ンジであるが、第１図、第２図では簡単のため省
略している。 Note that the reference numeral 9' in FIG. 3 is a flange of the toothed pulley 9, but it is omitted in FIGS. 1 and 2 for the sake of simplicity.
１１はアーム６が振動しないようローラをベル
トに押しつけるための力の弱いバネである。 11 is a weak spring for pressing the roller against the belt so that the arm 6 does not vibrate.
ベルトに弛みがないよう前後プーリの軸間を調
整したとき、張り側ベルト４ａ及び弛み側のベル
ト４ｂが、ローラ７及び歯付プーリ９により僅か
に屈曲するよう各部の長さは設定される。 The length of each part is set so that when the axes of the front and rear pulleys are adjusted so that there is no slack in the belt, the tension side belt 4a and the slack side belt 4b are slightly bent by the rollers 7 and toothed pulleys 9.
今、第１図においてペダル１２が踏まれて、ベ
ルト４に駆動力が働くと、張り側ベルト４ａに弾
性伸びを生じて弛み側ベルト４ｂがたるもうとす
る。しかし、張り側ベルト４ａは張力が働くこと
により真直ぐになろうとし、このためアイドラロ
ーラ７が押し上げられるため、アーム６を介して
歯付プーリ９が押し下げられて弛み側ベルト４ｂ
のたるみを取るので、後輪プーリ３において歯飛
びを生じることがない。 Now, in FIG. 1, when the pedal 12 is stepped on and a driving force is applied to the belt 4, the tension side belt 4a is elastically stretched and the slack side belt 4b tends to slacken. However, the tension side belt 4a tends to become straight due to tension, and as a result the idler roller 7 is pushed up, the toothed pulley 9 is pushed down via the arm 6, and the slack side belt 4b is pushed down.
Since the slack of the rear wheel pulley 3 is taken up, tooth skipping does not occur in the rear wheel pulley 3.
第２図において、歯付プーリ９の軸１０とアー
ム軸５の間の長さ2をアイドラローラ７の軸８
とアーム軸５の長さ1と同等又はより長くして
おくと、張り側ベルト４ａの張力の増加による動
きをアーム６を介して歯付プーリ９の大きな動き
に変換できるのでベルトの弾性伸びを確実に吸収
することができ、これにより後輪プーリでの歯飛
びを確実に防止することができる。 In FIG. 2, the length 2 between the shaft 10 of the toothed pulley 9 and the arm shaft 5 is the shaft 8 of the idler roller 7.
By making the length of the arm shaft 5 equal to or longer than the length 1 , the movement due to the increase in tension of the tension side belt 4a can be converted into a large movement of the toothed pulley 9 via the arm 6, so that the elastic stretch of the belt can be reduced. It can be reliably absorbed, thereby reliably preventing tooth skipping on the rear wheel pulley.
第４図は別の実施例を示すもので、第１の実施
例とは逆に歯付プーリ９が張り側ベルト４ａの歯
面に接し、アイドラローラ７が弛み側ベルト４ｂ
の背面に接している。 FIG. 4 shows another embodiment, in which, contrary to the first embodiment, the toothed pulley 9 is in contact with the tooth surface of the tension side belt 4a, and the idler roller 7 is in contact with the tooth surface of the slack side belt 4b.
is in contact with the back of the
この場合も、前述と同様の理由により、アイド
ラローラ７側のアーム長さ2は歯付プーリ９側
のアーム長さ1と等しいか、それより長くして
おくことが望ましい。 In this case as well, for the same reason as mentioned above, it is desirable that the arm length 2 on the idler roller 7 side is equal to or longer than the arm length 1 on the toothed pulley 9 side.
考案の効果 (1) 構造が簡単で安価である。Effect of invention (1) The structure is simple and inexpensive.
(2) したがつて、故障も少ない。(2) Therefore, there are fewer failures.
(3) 特公昭58−47592号の例では浮動ギヤのガイ
ドと内側ギヤの側面において摩擦音を生じる場
合があるが、本考案では音の出る要素がない。(3) In the example of Japanese Patent Publication No. 58-47592, friction noise may be generated at the guide of the floating gear and the side surface of the inner gear, but the present invention does not have any elements that produce sound.
(4) 実開昭56−39649号類似の方式に比べ、背面
からの曲げ回数が１回少ないのでベルトの屈曲
疲労の程度が少なくなる。(4) Compared to a system similar to Utility Model Application No. 56-39649, the number of bends from the back side is one less, so the degree of bending fatigue of the belt is reduced.
(5) また、前記の方式に比べアーム形状が簡単に
できる。(5) Also, the arm shape can be made easier compared to the above method.
(6) 歯付プーリにより、ベルト歯面に付着した泥
や砂が払い落されやすくなる。(6) Toothed pulleys make it easier to brush off mud and sand that adhere to the belt tooth surface.
第１図は、第１の実施例の全体図、第２図は第
１の実施例のテンシヨナ部拡大正面図、第３図は
第１の実施例のテンシヨナ部拡大断面図、第４図
は第２の実施例の全体図である。
１ａ……フレーム、４……歯付ベルト、４ａ…
…張り側ベルト、４ｂ……弛み側ベルト、５……
アーム軸、６……アーム、７……アイドラロー
ラ、８……アイドラローラ軸、９……歯付プー
リ、１０……歯付プーリ軸。
FIG. 1 is an overall view of the first embodiment, FIG. 2 is an enlarged front view of the tensioner section of the first embodiment, FIG. 3 is an enlarged sectional view of the tensioner section of the first embodiment, and FIG. 4 is an enlarged sectional view of the tensioner section of the first embodiment. FIG. 3 is an overall view of the second embodiment. 1a...Frame, 4...Toothed belt, 4a...
...Tight side belt, 4b... Loose side belt, 5...
Arm shaft, 6...Arm, 7...Idler roller, 8...Idler roller shaft, 9...Toothed pulley, 10...Toothed pulley shaft.
Claims (1)
在に設けられたアームの一端にアイドラローラ
を、他端に歯付プーリを有し、 前記アイドラローラは張り側ベルトの背面ま
たは弛み側ベルトの背面に接し、 前記歯付プーリは弛み側ベルトの歯面または
張り側ベルトの歯面に接するようにしたことを
特徴とする、自転車駆動ベルト用テンシヨナ。 (2) 前記アームの軸から前記弛み側ベルトの側に
ある歯付プーリまたはアイドラローラの軸まで
の長さが、前記アームの軸から前記張り側ベル
トの側にあるアイドラローラまたは歯付プーリ
の軸までの長さと等しいかまたはそれより大き
いことを特徴とする、実用新案登録請求の範囲
第１項記載の自転車駆動ベルト用テンシヨナ。[Claims for Utility Model Registration] (1) An arm provided rotatably around an axis supported by a frame has an idler roller at one end and a toothed pulley at the other end, and the idler roller is tensioned. A tensioner for a bicycle drive belt, characterized in that the toothed pulley is in contact with a back surface of a side belt or a back surface of a slack side belt, and the toothed pulley is in contact with a tooth surface of a slack side belt or a tooth surface of a tight side belt. (2) The length from the axis of the arm to the axis of the toothed pulley or idler roller on the side of the slack side belt is the same as the length from the axis of the arm to the axis of the idler roller or toothed pulley on the side of the tight side belt. The tensioner for a bicycle drive belt according to claim 1, characterized in that the tensioner has a length equal to or greater than the length to the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986150671U JPH0314473Y2 (en) | 1986-10-02 | 1986-10-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986150671U JPH0314473Y2 (en) | 1986-10-02 | 1986-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6357196U JPS6357196U (en) | 1988-04-16 |
| JPH0314473Y2 true JPH0314473Y2 (en) | 1991-03-29 |
Family
ID=31067019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986150671U Expired JPH0314473Y2 (en) | 1986-10-02 | 1986-10-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0314473Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030061739A (en) * | 2003-06-18 | 2003-07-22 | 문흥만 | Belt bicycle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62163487U (en) * | 1986-04-09 | 1987-10-17 |
-
1986
- 1986-10-02 JP JP1986150671U patent/JPH0314473Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6357196U (en) | 1988-04-16 |
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