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Patent Searching and Data


Title:
RAILWAY CROSSING GATE
Document Type and Number:
WIPO Patent Application WO/2021/053869
Kind Code:
A1
Abstract:
This railway crossing gate 1 has: a motor 4 that raises and lowers a crossbar; a motor drive unit 5; and a relay control unit 7. The motor drive unit 5 includes a relay 51 which is turned ON when drive voltage is applied thereto, and is configured to rotate the motor 4 in a direction that causes the crossbar to be raised when the relay 51 is turned ON and to rotate the motor 4 in a direction that causes the crossbar to be lowered when the relay 51 is turned OFF. The relay control unit 7 includes a capacitor 71 to which, as with to the relay 51, the drive voltage is applied while the relay 51 is turned ON, and is configured to temporarily turn ON the relay 51 by discharging electric charge accumulated in the capacitor 71 in the case when the load current of the motor 4 has exceeded a threshold during lowering of the crossbar, so as to cause the crossbar to be raised.

Inventors:
KURITA SHUHEI (JP)
OKAMI TAKEHIKO (JP)
KITA KEISUKE (JP)
IKEDA TAKAHIRO (JP)
IIDA KOUJI (JP)
Application Number:
JP2020/017598
Publication Date:
March 25, 2021
Filing Date:
April 24, 2020
Export Citation:
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Assignee:
NIPPON SIGNAL CO LTD (JP)
International Classes:
B61L29/16; B61L29/04
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (Akasaka Eight One Building 13-5, Nagata-cho 2-chome, Chiyoda-k, Tokyo 14, JP)
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