Title:
LOCK DEVICE FOR EXTENDABLE AND RETRACTABLE RAIL DEVICE FOR RAILWAY WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/182435
Kind Code:
A1
Abstract:
[Problem] To provide a lock device that prevents a movable rail in a retracted position in an extendable and retractable rail device from unexpectedly extending. [Solution] A lock device 3 comprises a main body 4 and a stopper key 5. The main body 4 has: a frame 6; a stopper member 7 pivotally supported on the frame 6; and a stopper block 8 that is movable in the frame 6 so as to restrain the stopper member 7 in a lock position and to release the stopper member 7 therefrom. The frame 6 has an insertion hole 63 composed of an insertion-removal hole 63a and a movement hole 63b, and the stopper block 8 has a through-hole 8a corresponding to the insertion-removable hole 63a. The stopper key 5 can be inserted from the insertion-removal hole 63a into the through-hole 8a of the stopper block 8 in a restraining position and moved in the movement hole 63b together with the stopper block 8 to a release position, but cannot be removed and inserted.
Inventors:
OTAKE YOSHIYUKI (JP)
Application Number:
PCT/JP2021/009154
Publication Date:
September 16, 2021
Filing Date:
March 09, 2021
Export Citation:
Assignee:
SANWA TEKKI CORP (JP)
International Classes:
B61J1/10; E01B23/00
Foreign References:
| JP2008261147A | 2008-10-30 | |||
| JP2008150819A | 2008-07-03 | |||
| JP2011208477A | 2011-10-20 | |||
| CN206843955U | 2018-01-05 |
Attorney, Agent or Firm:
OTSUKA Tadashi (JP)
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