Developmental Research on Wood Structure for Machine-Precutting System

本研究的目的是为最近开发的机器预切割系统提供一种创新的木框架结构。本研究是按照以下3个步骤1至3.1进行的。新结构节点的调查与选择：在现有文献资料的基础上，首先对节点的数量、种类、分类标准、分类实例、木工特点等进行了调查。然后提出了创新结构中新采用的接缝要求，并得出榫卯和鸽尾两种接缝最符合要求。第1学期所选节点的性能：在众多的榫卯和鸽子尾节点类型中，选取了两种具有代表性的节点类型，通过拉伸、压缩和剪切试验，明确了它们的强度特性、和易性和节点刚度系数。一种创新结构的呈现及其在木结构房屋模型中的应用：新木结构构成的基本概念来源于上述研究，即节点种类的简单性，传统框架的继承，但大量使用上述两种类型的节点，以及结构分析中的半刚性节点分析。然后，它们被证明是有用的设计，我们的目标是一个木制的房子。

This research has an object to present an innovative structure of wooden frameworks for the machine-precutting systems recently developed. The research has carried out along the line of the following three steps 1 to 3.1. Investigations and selection of joints for the new structure: Being based on the data of existing literatures, number of joints sorts, classification criteria, examples of classification, characteristics of wood working, etc. were investigated at first. Then we could present the requisites for the joints as newly adopted in the innovative structure, and concluded that two joints of tenon & mortise and dove tail were the most appropriate to the requisites.2. Performances of the joints selected in the term 1: Among many types of tenon & mortise and dove tail joints, two representative types were selected, and their strength properties, workability, and coefficients of joint rigidities were clarified by the experiments in tension, compression, and shear.3. Presentation of an innovative structure and its application to a model of wooden houses: Basic concepts for the constitution of a new wooden structure were derived from the above investigations, namely, simplicity of the joints sorts, the succession of the traditional framework in essential, but much use of the two types of the joints above described, and semi-rigid joint analysis in structural analysis. Then they were proved to be useful in the design of a wooden house we aimed at.