| 摘要 |
<p>A novel core piece for an exhaust gas catalyst device capable of realizing further reduction in weight, costs, etc. that are constantly demanded for automobile related components, a method of producing the core piece, and a method of inserting and fixing the core piece. A core piece (3) for an exhaust gas catalyst device (1), provided inside an outer tube body (2) into which an exhaust gas (G) is sent and purifying the exhaust gas (G) by a catalyst adhered and formed on the surface of the core piece (3), wherein the core piece (3) is attached to the outer tube body (2) by at least either a method where the core piece (3) is formed so as to return elastically in the outer peripheral direction when the core piece (3) is deformed in the inner peripheral direction in attaching the core piece (3) to the outer tube body (2), and the core piece (3) is attached to the outer tube body (2) by spring elasticity of the core piece (3) itself, or a method where an appropriate portion of the outer tube (2), into which the core piece (3) is inserted, is reduced in diameter to attach the core piece (3) to the outer tube body (2).</p> |
