Fixed structure, fixing method, and fixing device

Abstract

A structure in which a plurality of members including at least a first member are fixed, in which a first through-hole is provided in the first member, a caulked body is inserted into the first through-hole, a first opening portion that is open to one flat surface portion of the first member is formed at one end of the first through-hole, a first recessed portion is provided in the one flat surface portion of the first member to surround the first opening portion, a first head portion at one end of the caulked body is stored in the first recessed portion, and the one flat surface portion of the first member and the first head portion are flush with each other, and a fixing method and a fixing device, each of which includes a step of caulking both ends of the caulked body at the same time.

1 . A structure in which a plurality of members including at least a first member are fixed, wherein
 a first through-hole is provided in the first member,   a caulked body is inserted into the first through-hole,   a first opening portion that is open to one flat surface portion of the first member is formed at one end of the first through-hole,   a first recessed portion is provided in the one flat surface portion of the first member to surround the first opening portion,   a first head portion at one end of the caulked body is stored in the first recessed portion, and   the one flat surface portion of the first member and the first head portion are flush with each other.   
     
     
         2 . The structure according to  claim 1 , wherein
 the plurality of members include a second member,   a second opening portion that is open to a columnar protrusion portion formed on the other flat surface portion of the first member is formed at the other end of the first through-hole,   the second member is disposed around the protrusion portion,   a substantially annular fitting portion that is fitted to the protrusion portion is formed on the second member, and   the protrusion portion, the caulked body in the protrusion portion, and the fitting portion are caulked to have a substantially truncated conical shape.   
     
     
         3 . The structure according to  claim 1 , wherein
 the plurality of members include a third member,   a third through-hole that is substantially concentric with the first through-hole and has the same diameter as the first through hole is provided in the third member,   the caulked body is inserted into the first through-hole and the third through-hole,   a third opening portion that is open to one flat surface portion of the third member is formed at one end of the third through-hole,   a third recessed portion is provided in the one flat surface portion of the third member to surround the third opening portion,   a second head portion of at the other end of the caulked body is stored in the third recessed portion, and   the one flat surface portion of the third member and the second head portion are flush with each other.   
     
     
         4 . A heat sink, wherein the second member of the structure according to  claim 2  has an erecting portion that is perpendicular to the other flat surface portion of the first member. 
     
     
         5 . The heat sink according to  claim 4 , wherein a fourth member having a thermal conductivity and/or a strength higher than that of the first member and/or the second member is disposed between the first member and the second member. 
     
     
         6 . A heat sink, wherein a fourth member having a thermal conductivity and/or a strength higher than that of the first member and/or the second member is disposed between the first member and the second member of the structure according to  claim 2 . 
     
     
         7 . A heat sink, wherein a fourth member having a thermal conductivity and/or a strength higher than that of the first member and/or the third member is disposed between the first member and the third member of the structure according to  claim 3 . 
     
     
         8 . The structure according to  claim 1 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         9 . A fixing method of fixing a plurality of members, the fixing method comprising:
 overlapping the plurality of members such that through-holes provided in the plurality of members coincide with each other;   inserting a caulked body into the through-holes of the coinciding plurality of members; and   caulking both ends of the caulked body at the same time.   
     
     
         10 . The fixing method according to  claim 9 , wherein the one end of the caulked body is relatively pressed by pressing the plurality of members. 
     
     
         11 . A fixing device for fixing a plurality of members, the device comprising: a punch, a stripper, a die, and a die pin, wherein
 a caulked body is inserted into a through-hole penetrating the plurality of members,   the punch abuts one end of the caulked body,   the stripper abuts one flat surface portion of the plurality of members,   the die abuts the other flat surface portion of the plurality of members,   the die pin abuts the other end of the caulked body, and   the punch, the stripper, the die, and/or the die pin are moved such that both ends of the caulked body are simultaneously caulked.   
     
     
         12 . The fixing device according to  claim 11 , wherein the punch, the stripper, and the die are moved to press the other end of the caulked body relatively by the die pin when the die pin is fixed. 
     
     
         13 . The structure according to  claim 2 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         14 . The structure according to  claim 3 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         15 . The heat sink according to  claim 4 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         16 . The heat sink according to  claim 5 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         17 . The heat sink according to  claim 6 , wherein the caulked body is deformed into a substantially barrel shape. 
     
     
         18 . The heat sink according to  claim 7 , wherein the caulked body is deformed into a substantially barrel shape.