Title:
杭打機
Document Type and Number:
Japanese Patent JP6689536
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pile driver having a wire presser capable of preventing an undulation wire from slipping out of a gantry sheave even if the positional relationship between the gantry sheave and a middle sheave is largely changed.SOLUTION: A wire presser 31 comprises a pair of left-right rotary plates 32 and 33 rotatably installed on a sheave support shaft 20 and four connection members for respectively connecting mutual both rotary plates, and among the four connection members, two connection members positioned on the middle sheave side are formed as a guide connection member 34 for rotating the rotary plates by contacting with an undulation wire 26a, and two connection members positioned on the opposite side of a middle sheave are formed as wire presser connection members 35 and 36 for preventing the undulation wire 26 from slipping out of a gantry sheave 21.SELECTED DRAWING: Figure 1
Inventors:
Hiroshi Muto
Application Number:
JP2016133940A
Publication Date:
April 28, 2020
Filing Date:
July 06, 2016
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B15/00; E02D7/16
Domestic Patent References:
| JP2008127944A | ||||
| JP2010168147A | ||||
| JP9132381A |
Foreign References:
| US20100072156 |
Attorney, Agent or Firm:
Yoshihiko Kido
Kazuhiko Kido
Kazuhiko Kido