Title:
TRACTOR
Document Type and Number:
WIPO Patent Application WO/2018/105497
Kind Code:
A1
Abstract:
Provided is a technology of reliably preventing a work machine from operating when an engine starts. In this tractor, a lifting/lowering valve of a hydraulic lifting/lowering system of a work machine is mechanically connected to a lifting/lowering lever. An engine start condition in the tractor is that a reverser lever is neutral, a PTO clutch is off, a seat switch is on, and the lifting/lowering lever is at the lowest position. A switch driving unit is provided on a side surface orthogonal to the turning direction of the lifting/lowering lever, and a switch is provided at a position so as to face the switch driving unit when the lifting/lowering lever is turned to the lowest position, so that the lifting/lowering lever at the lowest position is detected by the switch.
Inventors:
MIYAZAKI TAKESHI (JP)
MIWA TOSHIYUKI (JP)
MIWA TOSHIYUKI (JP)
Application Number:
PCT/JP2017/043139
Publication Date:
June 14, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
YANMAR CO LTD (JP)
International Classes:
A01B63/00; A01B63/10; B60K28/04; B62D49/00
Foreign References:
| JP2007290617A | 2007-11-08 | |||
| JP2013129304A | 2013-07-04 | |||
| JPS63186208U | 1988-11-29 | |||
| JP2009273426A | 2009-11-26 | |||
| JP2010051189A | 2010-03-11 | |||
| JP2000106723A | 2000-04-18 | |||
| JP2016113044A | 2016-06-23 | |||
| JPH0632837Y2 | 1994-08-31 | |||
| JP2007325532A | 2007-12-20 | |||
| JP2003009608A | 2003-01-14 | |||
| JP2016200038A | 2016-12-01 | |||
| JP2004190636A | 2004-07-08 | |||
| JPS62139208U | 1987-09-02 | |||
| JPH099719A | 1997-01-14 | |||
| US20160029546A1 | 2016-02-04 | |||
| JPS63186208U | 1988-11-29 |
Other References:
See also references of EP 3549418A4
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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