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Patent Searching and Data


Title:
LOCK DEVICE AND OUTRIGGER
Document Type and Number:
Japanese Patent JP2018134912
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lock device which enables reduction of entry of foreign object.SOLUTION: A lock device 60 is fixed to an arm member, which can extend and contract relative to a box member 51, and includes: a bolt 61; a lever member 62 which is supported by the bolt 61 so as to rotate to a first position and a second position; and an engagement member 63 which is supported by the bolt 61 so as to rotate to a third position where the engagement member 63 engages with the box member 51 and a fourth position where the engagement member 63 is separated from the box member 51. The lever member 62 includes: a top plate 81; and a holding arm 83 extending from the top plate 81. The engagement member 63 includes: a base end part 91 which is disposed facing the top plate 81 at the radial inner side of the top plate 81 and rotatably supported by the bolt 61; and a claw part 92 which extends from the base end part 91 and engages with the box member 51 at the third position. An inner surface 81A of the top plate 81 curves along a circumferential direction of the bolt 61. An outer surface 93 of the base end part 91 curves along the circumferential direction and faces the inner surface 81A near the inner surface 81A in a radial direction.SELECTED DRAWING: Figure 7

Inventors:
ATSUMI MASASHI
Application Number:
JP2017029211A
Publication Date:
August 30, 2018
Filing Date:
February 20, 2017
Export Citation:
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Assignee:
TADANO LTD
International Classes:
B60S9/02; B66C23/78
Domestic Patent References:
JP2016175622A2016-10-06
JP2016097845A2016-05-30
JP2009091088A2009-04-30
Foreign References:
US20080265543A12008-10-30
US4865377A1989-09-12
US4422218A1983-12-27
US4648009A1987-03-03
Attorney, Agent or Firm:
Tomohiro Matsuda
Nobuo Nishiki