Title:
TENSION DEVICE
Document Type and Number:
Japanese Patent JP2001063918
Kind Code:
A
Abstract:
To provide a tension device for adjusting back tension plural steps or steplessly.
A tension device, for imparting tension to a wire rod W by engaging with the rod W moving from the supply source of the rod W to the treating device for the rod W, has a back tension pulley 107 for engaging with the rod W, imparting pulling force to the rod W, and movable in a given direction, first and second springs 129 and 135 for energizing the pulley 107 in a given direction, and an air cylinder 138 for canceling the energizing force of the spring 135, consequently tension imparted to the rod W by the pulley 107 can be changed at plural steps because of the variation of the energizing force of the spring in accordance with such canceling.
Inventors:
SUDO KATSUHIRO
SHIMIZU KENJI
SHIMIZU KENJI
Application Number:
JP23706499A
Publication Date:
March 13, 2001
Filing Date:
August 24, 1999
Export Citation:
Assignee:
TANAKA SEIKI CO
International Classes:
B65H59/10; B65H59/38; (IPC1-7): B65H59/10
Attorney, Agent or Firm:
Keijiro Tamura (1 person outside)