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前言油压机器的广泛使用,特别是近来的高压化趋向,同各机器間連接所用的配管和管接头一样,提出了改善和提高高压橡胶軟管性能的要求。压力配管用管接头按照JIS已被标准化了,性能是稳定的,但对橡胶軟管来說,JIS只就飞机用高压橡胶軟管做了規定,而没有对油压建筑机械等所用的橡胶軟管做出規定,因此由各橡胶軟管制造厂所保証的性能是多种多样的。没有作为保証一定性能的基准标准,又加以橡胶軟管本身的构造也很复杂,因此很难象压力配管用鋼管那样容易地用設計計算公式决定它的尺寸。目前大多是根据各軟管制造厂的产品目录釆决定尺寸。
Foreword The widespread use of hydraulic machines, especially the recent high-pressure trend, and piping and joints used in connection with various machines, has raised the need to improve and improve the performance of high-pressure rubber hoses. The pipe fittings for pressure piping have been standardized according to JIS, and the performance is stable. However, for rubber hoses, JIS only specifies the high-pressure rubber hoses for aircraft, and there is no rubber used for hydraulic construction machinery, etc. Pipes make regulations, so the performance guaranteed by each rubber hose manufacturer is varied. Since the construction of the rubber hose itself is not complicated as a reference standard for ensuring certain performance, it is difficult to determine the size of the rubber hose as easily as the pressure piping. At present, most of them are determined according to the product catalog of each hose manufacturer.