Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus including: a metallic shaft; and a covering layer, wherein the metallic shaft has a cylindrical shape formed so that one end portion and the other end portion of the metallic plate oppose each other, the one end portion and the other end portion each include a straight portion, a projection, and a depression, the projections on the one end portion engage the depressions on the other end portion, a straight area is located outside a projection and depression area in which the projection on the one end portion and the projection on the other end portion are aligned in an axial direction of the metallic shaft, and the projection and depression area is entirely covered with the covering layer and at least part of the straight area is exposed from the covering layer.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft. The metallic shaft includes a cylindrical portion formed so that one end portion and an other end portion of the metallic plate oppose each other and a projecting portion projecting from an end surface of the cylindrical portion outward in an axial direction of the metallic shaft. The projecting portion includes an end surface located at an end of the projecting portion in the axial direction and an inclined surface configured to connect the end surface of the projecting portion and the end surface of the cylindrical portion. The inclined surface is inclined with respect to the axial direction of the metallic shaft by extending outward from the end surface of the projecting portion in a circumference direction of the cylindrical portion.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft. The metallic shaft includes a cylindrical portion formed so that one end portion and an other end portion of the metallic plate oppose each other and a projecting portion projecting from an end surface of the cylindrical portion outward in an axial direction of the metallic shaft. The projecting portion includes an end surface located at an end of the projecting portion in the axial direction and an inclined surface configured to connect the end surface of the projecting portion and the end surface of the cylindrical portion. The inclined surface is inclined with respect to the axial direction of the metallic shaft by extending outward from the end surface of the projecting portion in a circumference direction of the cylindrical portion.

Abstract: A roller member used in an image forming apparatus including: a metallic shaft; and a covering layer, wherein the metallic shaft has a cylindrical shape formed so that one end portion and the other end portion of the metallic plate oppose each other, the one end portion and the other end portion each include a straight portion, a projection, and a depression, the projections on the one end portion engage the depressions on the other end portion, a straight area is located outside a projection and depression area in which the projection on the one end portion and the projection on the other end portion are aligned in an axial direction of the metallic shaft, and the projection and depression area is entirely covered with the covering layer and at least part of the straight area is exposed from the covering layer.