| 摘要 |
PURPOSE:To make it possible to perform the test applicable to actual use, by providing a plurality of test-piece holding tools at both ends of an upper arc shaped plate, providing a pair of arc shaped plates that are provided at the upper and lower sides of a tangent line, and imparting crank movement to one of the arc shaped plates on said tangent line. CONSTITUTION:A plurality of test-piece holding tools 26 are provided at both ends of an upper arc shaped plate 18. A test piece P is folded into two parts toward a crank pin 2. The upper part P1 is attached to the upper arc shaped plate 18 by using the holding tools 26 and 26'. The lower part P2 is attached to a lower arc shaped plate 19 by using holding tools 24. Then complicated frictional and sliding movement is performed between the upper and lower parts P1 and P2. Air is put into the test piece P. The test is conducted in the state very close to the actual using state. The test, which is applicable to the actual use, can be performed. |
