To provide a safety switch input diagnostic device and a work machine using the same, in which a switch operation and a failure mode of a circuit related to the switch may be diagnosed.SOLUTION: There are provide: a circuit 12 formed by connecting an emergency stop switch 14 and a line having a resistor in series; a circuit 11 having one end connected to one end of the circuit 12; a line L1 having one end connected to another end of the circuit 11 and another end connected to a power supply Vcc; a line L3 having one end connected to another end of the circuit 12; a circuit 22 having one end connected to another end of the line L3 and having another end connected to a ground GND; a circuit 13 connected in parallel with the circuit 12; a line L2 having one end connected to another end of the circuit 12; and a circuit 21 having one end connected to another end of the line L2 and having another end connected to the ground. Diagnosis of a connection state of the emergency stop switch 14 and the failure mode of the lines L1 to L3 is performed on the basis of a voltage value at one end of the circuit 21.SELECTED DRAWING: Figure 1
【課題】スイッチの操作とスイッチに係る回路の故障モードとを診断することができる安全スイッチ入力診断装置及びこれを用いた作業機械を提供すること。【解決手段】非常停止スイッチ14と抵抗器を有する線路とが直列接続されて形成される回路12と、一端が回路12の一端と接続された回路11と、一端が回路11の他端と接続されるとともに、他端が電源Vccと接続された線路L1と、一端が回路12の他端と接続された線路L3と、一端が線路L3の他端と接続されるとともに、他端が接地GNDと接続された回路22と、回路12と並列接続された回路13と、一端が回路12の他端と接続された線路L2と、一端が線路L2の他端と接続されるとともに、他端が接地と接続された回路21とを備え、回路21の一端の電圧値に基づいて非常停止スイッチ14の接続状態と線路L1〜L3の故障モードとを診断する。【選択図】 図1
SAFETY SWITCH INPUT DIAGNOSTIC DEVICE AND WORK MACHINE USING THE SAME
安全スイッチ入力診断装置及びこれを用いた作業機械
2020-04-02
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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