| 摘要 |
<p>A multi-layer structure roller is a multi-layer structure composed of a tubular-shaped metal-made outer cylinder section (20) located at the outer-most position, a tubular-shaped metal-made middle cylinder section (30) located on the inside of the outer cylinder section (20), and an tubular-shaped metal-made inner cylinder section (40) located on the inside of the middle cylinder section (30), in which coefficient of linear expansion of the middle cylinder section (30) is greater than the coefficient of linear expansion of the outer cylinder section (20), the outer cylinder section (20) and the middle cylinder section (30) are coupled by using the difference in heat-expansion caused by heating both cylinder sections (20,30) in the state sandwiching an elastic body (60) between both cylinder sections (20,30) to be laminated, tapers are respectively provided at the inner circumference of the middle cylinder section (30) and the outer circumference of the inner cylinder section (40) to fit the taper of the middle cylinder section (30), certainly coupled with the outer cylinder section (40) to sandwich the elastic body by expanding with heating, the taper of the inner cylinder section (40), being in the cooling shrinking state or the room-temperature state, and further, the middle cylinder section (30) and the inner cylinder section (40) are combined in the fitted state of the tapers with prevention from shrinkage caused when the middle cylinder section (30) is changed to the room-temperature. The middle cylinder section (30) can be attached onto the outer circumference surface with an elastic body (60). <IMAGE></p> |
