Title:
杭打機及び杭打機の使用方法
Document Type and Number:
Japanese Patent JP7213134
Kind Code:
B2
Abstract:
To provide a pile driver and a method for using the same comprising handrail devices for which high place work caused by operation for lying handrails down and returning handrails to the original raised state is not required, and that can be safely and easily handled.SOLUTION: A parallel link that can move in the front-rear and vertical directions is formed on an upper section of a handrail device 23 while a handrail body 28 remains in a horizontal state. On the upper end of a lower support 24, an arc and long guide hole 32b that extends in the circumferential direction of a lower support pin 25 is provided. A guide pin 33 provided at a lower section of an upper support 26 is formed so as to be able to engage with the guide hole and to pivot on the lower support pin. Because of this, a swinging angle range A for the upper support is set. The parallel link can move to: a laid down position in which the handrail body is lower than the limit height defined by regulations when a pair of upper supports reach the lower limit angle in the swinging angle range; and a raised position in which the handrail body is higher than the limit height when the pair of upper supports reach the upper limit angle in the swinging angle range.SELECTED DRAWING: Figure 3
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Inventors:
Takahashi Hidenao
Shigeki Tanaka
Yuya Tanida
Shigeki Tanaka
Yuya Tanida
Application Number:
JP2019088127A
Publication Date:
January 26, 2023
Filing Date:
May 08, 2019
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E02D13/00; E21B7/02
Domestic Patent References:
| JP2014101642A | ||||
| JP2008212275A | ||||
| JP2011219965A | ||||
| JP48026801Y1 | ||||
| JP2003095580A | ||||
| JP2011140802A |
Attorney, Agent or Firm:
Yoshihiko Kido
Kido Kazuhiko
Kido Kazuhiko