| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a weld structure for preventing the discharge of weld burr generated at the time of welding to the inside and outside of a case body, not exerting adverse effects on the rotary operation of an impeller and the appearance of the case body and generating no deviation even in dimensional accuracy, and a pump device. SOLUTION: In the weld structure for integrating a plurality of case members 1, 2 to form the case body 10 having an internal space, a fitting groove 13 is formed to the opposed region of the first case member 1 with the second case member 2 and the projected part 23 fitted in the fitting groove is formed to the opposed region of the second case member 2 with the first case member 1 and, when the projected part 23 is fitted in the fitting groove 13, a predetermined gap S is formed in the inside and outside direction of the case members and a positioning part 26 coming into contact with the inner or outer peripheral sides of the first case member 1 to position the first case member 1 in the inside and outside direction of the case members with respect to the second case member 2 is provided to the second case member 2.</p> |
