Title:
プレスブレーキ
Document Type and Number:
Japanese Patent JP6662467
Kind Code:
B2
Abstract:
A press brake includes a ram to which an upper or lower tool can be attached; a movable ram driver; and a controller that controls the ram driver, wherein the ram driver includes a rotation/linear motion converter composed of a screw fixed to the ram and moves upward and downward as the ram moves upward and downward, and a nut screw-coupled with the screw; a drive rotation body arranged rotatably about a rotation axis of the nut; a first motor arranged in a fixed state; a first power transmitter that transmits rotation of the first motor to the nut at high speed and with low torque; a second motor arranged in a fixed state; a second power transmitter that transmits rotation of the second motor to the drive rotation body at low speed and with high torque; and a clutch provided between the nut and the drive rotation body.
Inventors:
Kensei Hattori
Application Number:
JP2018547498A
Publication Date:
March 11, 2020
Filing Date:
September 28, 2017
Export Citation:
Assignee:
Murata Machinery Co., Ltd.
International Classes:
B30B1/18; B21D5/02; F16D28/00; F16H25/20; F16H25/24
Domestic Patent References:
| JP2003200221A | ||||
| JP5028588U | ||||
| JP2004098105A | ||||
| JP4075798A |
Foreign References:
| WO2015049930A1 |
Attorney, Agent or Firm:
Kazuya Nishi
Tomihiko Isono
Tomihiko Isono