| 摘要 |
PURPOSE:To take conveniently a periodic measurement without less difference in each measuring person by providing a grip part, elastic body fixed atop of it, and scale on which the flection extent of the elastic body is indicated. CONSTITUTION:The landing-zone door 14 is opened fully, and the self-closing force measuring instrument 19 is held in hand and inserted to the fitting position of plate rubber 3 fitted to a frame 2 at one side of th self-closing force measuring instrement 19 until it abuts on a door abutting frame 18. Then, the door 14 is closed and abuts on plate rubber 3 fitted to a frame 1 at the other side of the measuring instrument 19, and the measuring instrument 19 flexes with the self- closing force of the door 14 to read the scale of the measuring instrument 19 when the spring force of the measuring instrument 19 balances with the self- closing force of the door 14. The read value is the self-closing force. |
