Shock absorber, shock absorber manufacturing method, valve, and valve manufacturing method

A method of manufacturing a shock absorber including a cylinder, a piston provided inside the cylinder, and a body valve dividing an inside of the cylinder into two chambers, the body valve including a valve body having a working fluid passage, at least one disk-shaped valve member opening and closing the working fluid passage, a restricting member provided on an opposite side to the valve body in the valve member and thicker than the valve member, and a pin member disposed on inner peripheries of the valve member and the restricting member, having a flange portion provided at one end and a crimped portion provided at another end, arranging the valve body, the valve member, and the restricting member in an axial direction to integrate them, the method comprising:

• a residual axial force applying step of applying a residual axial force to the valve body and the valve member;
• a pressing step of pressing the restricting member toward the pin member;
• and
• a crimping step of forming the crimped portion by crimping.

A valve used in a shock absorber, comprising:

• a valve body which has a working fluid passage;
• at least one disk-shaped valve member that opens and closes the working fluid passage;
• a restricting member that is provided on an opposite side to the valve body in the valve member and thicker than the valve member;
• and
• a pin member that is disposed on inner peripheries of the valve member and the restricting member, has a flange portion provided at one end and a crimped portion provided at another end, and arranges the valve body, the valve member, and the restricting member in an axial direction to integrate them,
• wherein a gap between the restricting member and the pin member is smaller than a gap between the valve body and the pin member.

A method of manufacturing a valve used in a shock absorber and including a valve body having a working fluid passage, at least one disk-shaped valve member opening and closing the working fluid passage, a restricting member provided on an opposite side to the valve body in the valve member and thicker than the valve member, and a pin member disposed on inner peripheries of the valve member and the restricting member, having a flange portion provided at one end and a crimped portion provided at another end, and arranging the valve body, the valve member, and the restricting member in an axial direction to integrate them, the method comprising:

• a residual axial force applying step of applying a residual axial force to the valve body and the valve member;
• a pressing step of pressing the restricting member toward the pin member;
• and
• a crimping step of forming the crimped portion by crimping.