Title:
ばね組立体の製造方法
Document Type and Number:
Japanese Patent JP4077375
Kind Code:
B2
Abstract:
Large-diameter projection portions (3) and small-diameter projection portions (4) are formed in each of the two annular plates (1A,1B), while large-diameter end turn portions (2a), which are respectively associated with large-diameter projection portions, and small-diameter end turn portions (2b), which are respectively associated with small-diameter projection portions, are formed in the compress ion coil springs (2). Then, a punch (5) having a diameter portion (D2), whose diameter is larger than the inside diameter (D1) of the large-diameter projection portion, is inserted thereinto and increases the diameter thereof. Consequently, the large-diameter end turn portions of the compression coil springs are assembled to each of the annular plates. Subsequently, the punch (6) having a portion (D5), whose diameter is larger than the inside diameter (D4) of the small-diameter end turn portion is inserted from the inside of each of the enlarged large-diameter projection portions into the small-diameter projection portion and increases the diameter of the small-diameter projection portion.
Inventors:
Wakamori Masami
Fueki Hisae
Fueki Hisae
Application Number:
JP2003190011A
Publication Date:
April 16, 2008
Filing Date:
July 02, 2003
Export Citation:
Assignee:
Piolux Co., Ltd.
International Classes:
B23P11/02; F16F1/12; B21F15/10; B21K25/00; B23P11/00; B23P19/04; B23P21/00; F16F3/04
Domestic Patent References:
| JP2003025165A | ||||
| JP60191736U | ||||
| JP2096053U |
Attorney, Agent or Firm:
Shunichiro Ichihashi