| 摘要 |
PROBLEM TO BE SOLVED: To prevent damage and dropping-out of a screw shaft, by providing a restrictive means prohibitting the outward movement of the screw shaft exceeding a specified range, in a packing structure of an instrument provided with the parts including the screw shaft. SOLUTION: In the packing of an air heater 1 provided with front legs 3a, 3b composed of a screw shaft 31 screwed in the screw hole at the bottom wall and a leg part 32, the packing structure is provided with the first shock- absorbing block 2a covering one corner at the underside of the air heater 1. And the first recession 21 recessed downward forming the first recess 20a on which the corner is fitted and containing a leg part 32 at the first face 201 in the first recess 20a, is formed. The first wall 27 between respective recessions 21, 25 is made thin to lessen the strength so as not to bring damage in the screw shaft 31. The second shock-absorbing block 2b is formed to cover the corner at the opposite side of the first shock-absorbing block 2a and have a symmetrical shape against the first shock-absorbing block 2a. |
