Title:
PUNCHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/077693
Kind Code:
A1
Abstract:
A punching device (10) includes a body (12), a drive unit (18) connected to an upper part of the body (12), and a cam block (76) that moves in a horizontal direction in the interior of the body (12) under a driving action of the drive unit (18). A second rotating roller (108), which is connected to a rod (16), is inserted in a second cam groove (96) of the cam block (76). The second cam groove (96) includes first and second groove portions (98, 100) inclined at predetermined angles with respect to the direction of movement of the cam block (76), such that when the rod (16) descends downwardly toward a workpiece (W), a second rotating roller (108) moves from the second groove portion (100) to the first groove portion (98) having a smaller angle of inclination, whereby the driving force transmitted to the rod (16) is boosted in power.
Inventors:
NAGAI HIROTSUGU (JP)
Application Number:
PCT/JP2016/004666
Publication Date:
May 11, 2017
Filing Date:
October 24, 2016
Export Citation:
Assignee:
SMC CORP (JP)
International Classes:
B21D28/20; B21D28/00; B30B1/14; B30B1/40
Domestic Patent References:
| WO2014168227A1 | 2014-10-16 |
Foreign References:
| US3529502A | 1970-09-22 | |||
| JP2014205151A | 2014-10-30 |
Attorney, Agent or Firm:
CHIBA, Yoshihiro et al. (JP)
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