Studies on the development of a new yarder which is exclusively used for Iw.U.S. in standing skyline system of cable logging

新型Iw.U.S.专用码机的开发研究

• 批准号: 58860020
• 负责人: OKAWARA Shoji
• 金额: $ 5.12万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1983
• 资助国家: 日本
• 起止时间: 1983 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-58860020/
• 关键词: standing skyline system; Iw.U.S.; differential friction clutch

This yarder is characterized by the installation of a new special equipment of DRK (Differentialreibungskupplung), which enables the speed of the two operating lines (main and endless line) to be simply balanced, when it is applied to the Iw.U.S.. The fundamental principle of DRK is based on differential friction clutch, but unlike traditional interlocking in America, DRK functions not between every drive gear and driven drum, but direct between two drums (main and endless-drum) each other. Therefore any special design as a complicated, expensive or great and heavy yarder of interlocking is thoroughly avoidable.This yarder can be also widely used for the other cable logging systems in general if DRK is merely kept to be free. The friction inside DRK causes the losses of power but it is sufficiently small to practical use and serves favorably as a brake for running of carriage caused by the gravity of load in the case of down-hill yarding, so that the control of another brake may not be necessary.During inhaul the operator can control DRK with its lever very easily and almost stationarily. The trial product of the yarder with a power of 48 PS was developed in 1985 and then its expected properties were realized through the logging operations performed in the experimental forest of Iwate University. The main contributions of this method were : A. Continuous lifting the load above ground could be guaranteed under every skidding conditions. B. The operational efficiency of skidding could be greater than that when using of the brake on the endless-drum. C. From the ergonomical point of view the strain of the operator during control DRK was very slight (rather in relaxation), which was proved by the pulse measurment (heart checker) of the operator.

该码垛机的特点是安装了DRK（Differentialreibungskupplung）的新型专用设备，当应用于Iw.U.S.时，可以简单地平衡两条作业线（主线和循环线）的速度。 DRK的原理是基于差速摩擦离合器，但与美国传统的联锁不同，DRK不是在每个驱动齿轮和从动滚筒之间起作用，而是直接在两个滚筒（主滚筒和环形滚筒）之间起作用。因此，完全可以避免任何特殊设计，如复杂、昂贵或庞大而笨重的联锁编码器。如果DRK仅保持免费，则该编码器还可以广泛用于一般的其他电缆测井系统。 DRK内部的摩擦力会造成动力损失，但对于实际使用来说足够小，并且在下坡码放的情况下，可以有利地作为负载重力引起的车厢运行的制动器，从而可以控制另一个制动器没有必要。在牵引过程中，操作员可以非常轻松且几乎静止地用其控制杆控制 DRK。 1985年开发出功率为48PS的码垛机试制品，通过在岩手大学实验林进行的伐木作业，实现了其预期性能。该方法的主要贡献是： A.在各种打滑条件下都能保证将负载连续提升到地面以上。 B、滑行作业效率比使用环形滚筒制动时更高。 C. 从人体工程学的角度来看，操作者在控制 DRK 过程中的应变非常轻微（而不是放松），这由操作者的脉搏测量（心脏检查器）证明。

项目成果

Transactions of the Annual Meeting of the Japanese Forestry Society. 95. (1984)

日本林业学会年会论文集。

日本林学会大会発表論文集. 97. (1986)

日本林业学会会议记录。97。（1986）

Transactions of the Annual Meeting of the Japanese Forestry Society. 96. (1985)

日本林业学会年会论文集。

日本林学会大会発表論文集. 95. (1984)

日本林业学会会议论文集 95。（1984）

Transactions of the Annual Meeting of the Japanese Forestry Society. 97. (1986)

日本林业学会年会论文集。