Vehicle opening/closing member damper apparatus and vehicle opening/closing member stopper apparatus

A vehicle opening/closing member damper apparatus which is disposed between an opening portion provided in a vehicle and an opening/closing member attached to the opening portion for preventing a vibration of the opening/closing member upon its closure, including:

• a piston having a flange-shaped piston main body and a pair of piston rods which project respectively from both end faces of the piston main body;
• a cylinder having
• a first body having a first cylindrical portion which accommodates the piston main body slidably and a second cylindrical portion which extends continuously from one end portion of the first cylindrical portion while being reduced in diameter and which accommodates one of the piston rods being inserted therethrough and
• a second body which accommodates the other of the piston rods therethrough, which is connected to the other end portion of the first cylindrical portion of the first body and which is secured to one of the circumferential edge of the opening portion and the opening/closing member,
• an interior of the cylinder being filled with a viscous fluid;
• and
• an elastic member which biases the piston so that the one of the piston rods projects from the second cylindrical portion of the first body and a distal end portion of the piston rod abuts the other of the circumferential edge of the opening portion and the opening/closing member,
• wherein, when the piston moves towards the second body against the elastic member, the piston main body directly or indirectly abuts the second body so as to restrict a further movement of the piston.

A vehicle opening/closing member damper apparatus which is disposed between an opening portion provided in a vehicle and an opening/closing member attached to the opening portion for preventing a vibration of the opening/closing member upon its closure, including:

• a piston having a flange-shaped piston main body and a pair of piston rods which project respectively from both end faces of the piston main body;
• a cylinder having
• a first body having a first cylindrical portion which accommodates the piston main body slidably, a second cylindrical portion which extends continuously from one end portion of the first cylindrical portion while being reduced in diameter and which supports one of the piston rods being inserted therethrough and a first flange portion which extends from a circumferential edge of the other end portion of the first cylindrical portion and
• a second body having a third cylindrical portion which supports the other of the piston rods being inserted therethrough and a second flange portion which extends from a circumferential edge of one end portion of the third cylindrical portion to be joined to the first flange portion and which is secured to one of the circumferential edge of the opening portion and the opening/closing member,
• an interior of the cylinder being filled with a viscous fluid;
• and
• a coil spring which biases the piston so that the one of the piston rods projects from the second cylindrical portion of the first body and a distal end portion of the piston rod abuts the other of the circumferential edge of the opening portion and the opening/closing member,
• wherein the coil spring is disposed on an outer circumference of the cylinder such that one end of the coil spring is supported by abutting a joint portion of the first flange portion and the second flange portion while the other end of the coil spring is supported on a distal end portion side of the piston rod projecting from the second cylindrical portion.

A vehicle opening/closing member damper apparatus which is disposed between an opening portion provided in a vehicle and an opening/closing member attached to the opening portion for restricting a rotation of the opening/closing member and for preventing a vibration of the opening/closing member upon its closure, including:

• an expandable/contractable stopper main body including
• a piston having a flange-shaped piston main body and a pair of piston rods which project respectively from both end faces of the piston main body and
• a cylinder having a cylinder main body which accommodates the piston main body slidably and cylindrical portions which support respectively the pair of piston rods slidably, an interior of the cylinder being filled with a viscous fluid;
• a fastener which secures a proximal end portion of the stopper main body to one of a circumferential edge of the opening portion and the opening/closing member such that a distal end portion of the stopper main body is directed towards the other of the circumferential edge of the opening portion and the opening/closing member;
• and
• an elastic member which biases the piston so that one of the piston rods projects from the other of the cylindrical portions and a distal end portion of the piston rod abuts the other of the circumferential edge of the opening portion and the opening/closing member,
• wherein a flange portion which engages with a circumferential edge on a front side of an attachment hole which is provided in the circumferential edge of the opening portion or the opening/closing member and an insertion portion which is inserted into the attachment hole so as to be engaged with a circumferential edge on a rear side of the attachment hole are provided on the fastener, and
• wherein there is provided an expandable/contractable cover member which covers a portion of the stopper main body projecting from the front side of the attachment hole and which is joined to the flange portion of the fastener, so that air inside the cover member is allowed to communicate from the insertion portion to an exterior of the fastener on the rear side of the attachment hole through a gap between the stopper main body and the fastener when the cover member is expanded or contracted.