Stopper for vehicle

1. A stopper for vehicle which is disposed between a vehicle body side member and a wheel side member to restrict a relative amount of movement of the vehicle body side member and the wheel side member, the stopper for vehicle comprising:

a cylindrical holding member including a first end portion on one side in a vertical direction, and a second end portion on the other side in the vertical direction, the first end portion attached to one of the vehicle body side member and the wheel side member and disposed above the second end portion in the vertical direction; and

an elastic body which is held by the holding member, protrudes toward the other side in the vertical direction from the holding member, and faces the other of the vehicle body side member and the wheel side member,

wherein a folded-back portion, which is bent outward in a radial direction of the holding member and folded back toward the one side in the vertical direction, is formed at the second end portion of the holding member,

wherein the folded-back portion comprises:

a curved portion gradually extending toward the other side in the vertical direction and outward in the radial direction from an adjacent portion of the holding member adjacent to the folded-back portion,

a base portion extending outward in the radial direction from the curved portion, and

an inverted portion gradually extending toward the one side in the vertical direction and outward in the radial direction from the base portion, and

wherein a drainage hole penetrating the folded-back portion is formed in the inverted portion thereof, and

wherein the elastic body is configured to expand in the radial direction while contacting the folded back portion.

2. The stopper for vehicle according to claim 1 , wherein the drainage hole penetrates the folded-back portion in the vertical direction, and

an inner portion of an inner circumferential surface of the drainage hole located inside in the radial direction and facing outward in the radial direction gradually extends outward in the radial direction from the one side toward the other side in the vertical direction.

3. The stopper for vehicle according to claim 1 , wherein at least a part of the drainage hole is located in a portion located to be closest to the other side in the vertical direction, of an inner surface facing the one side in the vertical direction, of the folded-back portion.

4. A stopper for vehicle which is disposed between a vehicle body side member and a wheel side member to restrict a relative amount of movement of the vehicle body side member and the wheel side member, the stopper for vehicle comprising:

a cylindrical holding member including a first end portion on one side in a vertical direction, and a second end portion on the other side in the vertical direction, the first end portion attached to one of the vehicle body side member and the wheel side member and disposed above the second end portion in the vertical direction; and

an elastic body which is held by the holding member, protrudes toward the other side in the vertical direction from the holding member, and faces the other of the vehicle body side member and the wheel side member,

wherein a folded-back portion, which is bent outward in a radial direction of the holding member and folded back toward the one side in the vertical direction, is formed at the second end portion of the holding member,

wherein the folded-back portion comprises:

a curved portion gradually extending toward the other side in the vertical direction and outward in the radial direction from an adjacent portion of the holding member adjacent to the folded-back portion,

a flat base portion extending outward in the radial direction from the curved portion, and

an inverted portion gradually extending toward the one side in the vertical direction and outward in the radial direction from the base portion, and

wherein a drainage hole penetrating the folded-back portion is formed in the inverted portion thereof.