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- 〈穀物など〉‘を'束ねる
- sheafの複数形
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/01/28 22:53:52」(JST)
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Not to be confused with sheaf, which has the same plural as "sheave".
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Look up sheave in Wiktionary, the free dictionary. |
Pulley block including sheave.
A sheave // is a wheel or roller with a groove along its edge for holding a belt, rope, or cable. When hung between two supports and equipped with a belt, rope or cable, one or more sheaves make up a pulley. The words sheave and pulley are sometimes used interchangeably.
A sheave can also refer to a pulley which has an adjustable operating diameter for use with a mechanical belt. This is accomplished by constructing the pulley out of several pieces. The two main "halves" of the pulley can be moved closer together or farther apart, thus altering the operational diameter. The usual construction is some sort of locking collar or set screws to secure the components, one half with a threaded central shaft and one half with a threaded center. By rotating the components one can "screw" the parts closer together or further apart, thus changing the distance between the two halves and allowing the belt to ride higher or lower in the groove. The adjustments are constrained to a specific range of size and are not limitless.
See also
- Block and tackle
- Block (sailing)
- Eccentric (mechanism)
English Journal
- Creep rupture behavior of polypropylene suture material and its applications as a time-release mechanism.
- Kusy RP, Whitley JQ.
- Journal of biomedical materials research.J Biomed Mater Res.1983 May;17(3):411-25.
- The controlled failure of polypropylene (PP) sutures is studied via creep rupture tests. From plots of log time (tB) vs. stress (sigma), linear relationships are generated over the failure times of 1-1000 h. Results show that as a function of stress, the time dependence varies with irradiation dose
- PMID 6345549
Japanese Journal
- エレベータ式立体駐車場用ワイヤロープの疲労損傷機構と寿命評価
- 出口 明雄,小笠原 和也,蜂須賀 俊次
- 日本機械学会論文集 A編 79(801), 672-681, 2013
- … In this paper, first, the damage mechanism and behavior of wire rope in this parking system were studied using the exchanged wire rope attained the criterion, 10% breakage of wire, and then the estimation method of fatigue life of wire rope is proposed, based on S-bend fatigue test simulated the actual condition, using the wire bending stress σb by sheaves and the fatigue strength reduction factor Kf which is related to the contact force PUC with driving sheave as a function of wire rope tension. …
- NAID 130003374640
- 104 トラクションシーブP. C. D.差がシーブ・ロープに及ぼす影響
- 戸川 寛太,新井 晋治,上床 昌弘
- 昇降機・遊戯施設等の最近の技術と進歩技術講演会講演論文集 : Elevator, Escalator and Amusement Rides Conference 2011, 31-34, 2012-01-18
- … This paper describes problems of sheave and rope caused by Pitch Circle Diameter (P.C.D.) difference. … Traction sheave of elevator has P.C.D. … When traction sheave has P.C.D. … difference, running radius of rope on each groove is different from each other, and it is suspected doing damage to sheave and rope. …
- NAID 110009665249
- 102 コンペンセーションシーブの抑制によるエレベータロープの制振
- 中川 淳一,新井 晋治
- 昇降機・遊戯施設等の最近の技術と進歩技術講演会講演論文集 : Elevator, Escalator and Amusement Rides Conference 2011, 23-26, 2012-01-18
- … The behavior of the elevator ropes is influenced by interaction between deflection of the elevator rope and the movement of a compensation sheave. … Specifically, the lateral vibration of the elevator ropes is damped by attaching a damper to a compensation sheave and resisting vertical vibration of this sheave. …
- NAID 110009665247
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