Patent ID: 8535611

Claim:
An exhaust gas purifying device comprising: a case body that includes a plurality of cases, and a heat insulating unit that is provided to an inner surface of the case body over a substantially-entire area from an upstream side to a downstream side in an exhaust gas flowing direction, wherein the heat insulating unit includes first heat insulating units and second heat insulating units provided in the plurality of cases, the first heat insulating units being placed in the cases in such a manner as not to protrude from openings of the cases, and the second heat insulating units being placed in such a manner as to bridge over joint portions between the cases, each of the second heat insulating units includes: an inner ring member placed on inner sides of the cases; a heat insulator placed between the inner ring member and inner surfaces of the cases; and an outer ring member placed between the inner surfaces of the cases and the heat insulator.