| 主权项 |
1. A honeycomb structure comprising:
a honeycomb basal body having porous partition walls defining a plurality of cells having an extending direction that become through channels of a fluid; and a ring-shaped convex portion surrounding an outer periphery of the honeycomb basal body and covering only a part of the outer periphery in a direction parallel to the extending direction of the cells, wherein the ring-shaped convex portion is disposed to project outwardly from the outer periphery of the honeycomb basal body, and in the ring-shaped convex portion, outwardly adjacent plural cells are formed to extend in parallel to the extending direction of the cells, with each adjacent plural cell having a length, and the length of an outward plural cell being less than the length of an inward plural cell such that both end portions of the ring-shaped convex portion are tapered, a thickness of the ring-shaped convex portion in a cross section perpendicular to the extending direction of the cells is from 3 to 20 mm, and a part of a surface of the ring-shaped convex portion, when viewed in a plane perpendicular to the extending direction of the cells, has a planar shape parallel to the extending direction of the cells. |
