Emergency controller
An emergency controller includes an emergency stop switch to be activated upon detection of an emergency, a control section to be enabled upon activation of the emergency stop switch, and an emergency stop mechanism configured to execute and release braking by a brake mechanism under control of the control section. The control section is configured to perform execution control for causing the emergency stop mechanism to execute braking by the brake mechanism and for stopping operation of the engine upon the condition that the emergency stop switch is activated while the engine is in operation. The control section is configured to perform restoration control for causing the emergency stop mechanism to release the braking by the brake mechanism upon the condition that the emergency stop switch is deactivated and the engine is started.
1. An emergency controller installable in a vehicle including an engine and a brake mechanism, the emergency controller, comprising:
an emergency stop switch to be activated upon detection of an emergency;
a control section to be enabled upon activation of the emergency stop switch; and
an emergency stop mechanism configured to execute and release braking by the brake mechanism under control of the control section, wherein
the control section is configured to perform execution control for causing the emergency stop mechanism to execute braking by the brake mechanism and stopping operation of the engine upon the condition that the emergency stop switch is activated while the engine is in operation,
the control section is configured to perform restoration control for causing the emergency stop mechanism to release the braking by the brake mechanism upon the condition that the emergency stop switch is deactivated and the engine is started,
the brake mechanism is a hydraulic brake mechanism, the brake mechanism including:
a brake lever;
a first hydraulic cylinder having a first piston rod that is slidable in response to an operation of the brake lever;
a brake hose connected to the first hydraulic cylinder;
a brake pad connected to the brake hose; and
a tank for feeding the brake hose with brake fluid,
the emergency stop mechanism further comprises a second hydraulic cylinder, the second hydraulic cylinder being at a position upstream of the first hydraulic cylinder or a position downstream of the first hydraulic cylinder and having a second piston rod that is slidable in response to a signal from the control section, wherein
upon the condition that the second piston rod is slid, communication is blocked between the tank and the brake hose at a downstream side of the second hydraulic cylinder and a rise in pressure is caused inside the brake hose at the downstream side of the second hydraulic cylinder, such that the brake pad is pressed.
2. The emergency controller according to claim 1 , wherein
the emergency stop mechanism includes:
a pressing member that is operable to press the second piston rod of the second hydraulic cylinder; and
a driving mechanism that is operable to move the pressing member, and
the driving mechanism is configured to be driven forwardly according to the execution control to press the piston rod, and the driving mechanism is configured to be driven reversely according to the restoration control to release the pressure on the piston rod.