Method for joining members, and composite elastic body used in said method

A method for joining members, the method comprising:

• preparing a first member provided with a hole, a second member having a tubular shape, and a composite elastic body obtained by combining at least two types of elastic bodies having different hardness;
• inserting the second member into the hole of the first member;
• inserting the composite elastic body into the second member;
• and
• pressing the composite elastic body to cause the second member to bulge out, thereby joining the first member and the second member by press-fitting, wherein
• the composite elastic body has a columnar shape including a first end surface having a flat shape and a second end surface having a flat shape, the first end surface and the second end surface receiving a pressing force in such a manner as to be sandwiched, and a side surface connecting the first end surface and the second end surface, and
• the composite elastic body includes a first elastic body having relatively high hardness and a second elastic body having relatively low hardness,
• the method further comprising preparing a pusher that includes a drive surface for pressing the first end surface and is driven in a direction perpendicular to the first end surface, and a receiver that includes a fixing surface for supporting the second end surface and is positionally fixed;
• and
• pressing the composite elastic body to sandwich the composite elastic body between the drive surface of the pusher and the fixing surface of the receiver, wherein
• the first elastic body has a tapered columnar shape extending from the first end surface to the second end surface, and
• the second elastic body is disposed around the first elastic body and constitutes a whole of the side surface.

A method for joining members, the method comprising:

• preparing a first member provided with a hole, a second member having a tubular shape, and a composite elastic body obtained by combining at least two types of elastic bodies having different hardness;
• inserting the second member into the hole of the first member;
• inserting the composite elastic body into the second member;
• and
• pressing the composite elastic body to cause the second member to bulge out, thereby joining the first member and the second member by press-fitting, wherein
• the composite elastic body has a columnar shape including a first end surface having a flat shape and a second end surface having a flat shape, the first end surface and the second end surface receiving a pressing force in such a manner as to be sandwiched, and a side surface connecting the first end surface and the second end surface, and
• the composite elastic body includes a first elastic body having relatively high hardness and a second elastic body having relatively low hardness,
• the method further comprising preparing a pusher that includes a drive surface for pressing the first end surface and is driven in a direction perpendicular to the first end surface, and a receiver that includes a fixing surface for supporting the second end surface and is positionally fixed;
• disposing a lower surface of the second member and the second end surface of the composite elastic body to make the lower surface and the second end surface flush with each other on the fixing surface of the receiver;
• and
• pressing the composite elastic body to sandwich the composite elastic body between the drive surface of the pusher and the fixing surface of the receiver, wherein
• the second elastic body constitutes a whole of the second end surface and a part of the first end surface.