Research on the development of harvester with the delimbing function of broad leaved tree

收割机是一种具有高效、多工序的采伐机械。但到目前为止，还没有制造出具有阔叶树划界功能的机器。因此，从1993财政年度开始，我们继续进行研究，将阔叶树的定界函数附加到收割机上。第一年讨论了划界设备的结构。经过检查，我们对Knife进行了相应的改进。在第一阶段制作了一些具有不同前斜角和逃逸角的刀具。这些刀具的划界能力与桦树属有关。结果表明，形成23度前斜角和3度逸出角的刀具是合适的。在1994财政年度，发展的典型刀具是从以前的结果。讨论了刀具的耐用性和粘接方法。因此，采用了两层柔性刀。估计了7种类型，估计的点如下：切割成功，残枝长度，切割强度。通过这些数据对刀具的应用进行了讨论。在规则边的情况下，23度是最优的。研究结果表明，对阔叶树，尤其是林分密度高、茎直的桦木次生林，改进刀具可以使阔叶树的定界更加容易。

Harvester is a logging machine that have functions of the highly efficient and the meny process. But until the present, machines with the delimbing function of the broad leaved tree are not made. Therefore, we have ccontinued research that attaches a delimbing function of the broad leaved tree to harvestor, from the fiscal year 1993. The structure for delimbing equipment was discussed at the first year. As a result of examination, we corresponded with the improvement of Knife.Some Knives which had different front bevel angles and escape angles were made at the first stage. Delimbing ability of those knives were with Betula species. As the result, it was cleared that knives which formed 23 degree front bevel angle and 3 degree escape angle was proper.In the fiscal year 1994, the development of the parcical knives was aimed from former results. That is, endurance and attaching method of the knives with its forms was discussed. As the result, the two-storied and flexibility knives were adoped.7 types were estimated, the points of the estimation were as follows ; successfulness of cutting, length of residual branch, cutting strenghth. The application of the knives was discussed by those data. It was realized in the case of regular edge 23 degree was optirimal.In this study, it was concluded that the improvement of the knives would enable the delimbing of broad leaved tree, especially in the secondary forest of betula species which have high stand density and straight stems.