Joint - Joint

Japanese: 継手 - つぎて
Joint - Joint

A general term for structures that join components of machines and buildings. Rivets, bolts and nuts, or welding are used to join steel frames and steel plates in bridges, steel towers, boilers, etc., and they are called riveted joints, screw joints, welded joints, etc. Rivet joints are classified into types such as lap joints and butt joints depending on the form of the joint between the plates, and single-row rivets and double-row rivets depending on the arrangement of the rivets. Welded joints are easier to work with than riveted joints, and the weight is reduced by the amount of rivets and reinforcing materials. In shipbuilding, riveted joints are no longer used due to advances in welding technology. Many joints are used to join machine parts, such as shaft joints that join shafts to shafts and pipe joints that join pipes to pipes.

In wooden architecture, the term "tsugite" is used when connecting pillars and pillars, beams and beams in the longitudinal direction of the components. Nails, bolts and nuts are often used to fasten the joints, but traditional joints that do not use metal components are still used today in places where little force is applied. There are many types of joints for wood, such as the saotsujigi joint, the koshikake dovetail joint and the ochikake joint. Note that connecting materials with different directions, such as pillars and beams or braces, at an angle is called a shiguchi, and not a tsugite.

[Hidetaro Nakayama]

[Reference items] | Pipe joints | Connections | Shaft joints | Rivets
Main types of fittings
©Takashi Aoki

Main types of fittings


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

機械、建造物の部材を結合する構造の総称。橋梁(きょうりょう)、鉄塔、ボイラーなど鉄骨、鉄板の結合には、リベット、ボルトとナット、あるいは溶接が使用され、リベット継手、ねじ継手、溶接継手などとよばれる。リベット継手には、板の結合部の形態により重ね継手、突き合せ継手など、リベットの配列により一列リベット、二列リベットなどの種類がある。溶接継手はリベット継手に比べて作業が簡単で、リベットと補強材の分だけ重量が軽減される。造船でも溶接技術の進歩によりリベット継手は使われなくなっている。機械部品の結合には、軸と軸を結合する軸継手、管と管を結合する管継手など、多くの継手が使われている。

 木造建築では、継手という呼び方を、柱と柱、梁(はり)と梁などを部材の長さ方向に結合する場合に用いる。接合部には釘(くぎ)やボルト、ナットを使用して固定することが多いが、力のあまり加わらない箇所では、金属部材を使わない伝統的な継手が今日でも行われている。木材の継手には、竿(さお)継ぎ、腰掛けあり継ぎ、追っ掛け継ぎなど多くの継手法がある。なお、柱と梁、筋かいなど方向の違う材料をある角度をもって結合することを仕口(しぐち)といって、継手とはよばない。

[中山秀太郎]

[参照項目] | 管継手 | 仕口 | 軸継手 | リベット
継手のおもな種類
©青木 隆">

継手のおもな種類


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