| 摘要 |
PURPOSE:To improve the safety to prevent a magnet from springing out, assembly workability, and scavenging workability by penetrating magnet single bodies and polar bodies stored in a main body tube with a connecting shaft and plugging both end parts of the main body tube with a pair of end plugs. CONSTITUTION:A bar magnet 1 is composed of a main body tube 2, a connecting shaft 5, and a pair of end plugs 6. A plurality of short cylinder-like magnet single bodies 3 having center holes 3a and a pluarlity of disk-like polar plates 4 having center holes 4a are reciprocally arranged in the axial direction and stored in the main body tube 2. The connecting shaft 5 penetrates the center holes 3a, 4a of respective magnet single bodies 3 and polar plates 4 and screw parts 5a at both end parts are set to face to both end parts of the main body tube 2. Moreover, respective end plugs 6 are screwed in both end parts of the connecting shaft 5, the smaller diameter parts 6a are fixed in the insides of both end parts of the main body tube 2, and the larger diameter parts 6c are made to plug the both end parts of the main body tube 2 in the condition in which the larger diameter parts 6c and the outer circumference of the main body tube 2 are set continuously. |
