Weather strip, and attachment structure of weather strip

An attachment structure of a weather strip made of a polymer material,

• the weather strip including an attachment portion formed in a shape having an exterior side wall portion, an interior side wall portion, and a base bottom portion connecting together both the side wall portions so as to be attached to a flange provided along the circumferential edge of an opening of a vehicle body formed by a plurality of panels, and a sealing portion provided at one of the side wall portions or the base bottom portion of the attachment portion, and the weather strip being arranged between the circumferential edge of the opening and a lid capable of opening and closing the opening of the vehicle body to seal a gap between the circumferential edge of the opening and the lid,
• wherein the weather strip is arranged so as to intersect a portion joined by overlapping the plurality of panels, and is provided with a tip projection portion which projects onto an extension line of the exterior side wall portion from the tip of the exterior side wall portion of the attachment portion, and
• wherein the tip projection portion is formed from a material which can deform more easily than a material forming the sealing portion, and the tip projection portion is formed in a shape which becomes thin towards a projecting direction with a width dimension which does not exceed the thickness of the tip of the exterior side wall portion in a cross section along the width direction of the attachment portion,
• wherein the tip of the exterior side wall portion is formed with a joining portion that includes a joining surface joined to the tip projection portion,
• wherein the projecting direction is the same as a direction in which the weather strip is attached to the flange,
• wherein the joining surface and the tip projection portion extend both more interior and more exterior, in a width direction of the exterior side wall portion, than a main portion of the exterior side wall portion,
• when the attachment portion is attached to the flange, the tip projection portion comes into contact with the panels from its tip, and compressively deforms gradually in the projecting direction so as to be broadened in the width direction of the attachment portion so that a width dimension after deformation becomes greater than a width dimension before the deformation, and the tip projection portion stretches in the longitudinal direction of the attachment portion and comes into contact with the panels.