JPS5933709Y2 - work vehicle - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a work vehicle.

In conventional work vehicles, if you forget to switch the transmission operation device such as the transmission or clutch to a non-transmission state and start the engine, the vehicle body will start suddenly, causing the vehicle to start suddenly near the edge of a cliff. This was extremely dangerous and could cause the vehicle to fall.

In view of the above-mentioned circumstances, the present invention aims to make it possible to extremely easily and reliably avoid dangerous situations caused by erroneous operations.

Next, embodiments of the present invention will be described in detail based on the drawings.

A diesel engine 3 and a control section 4 are mounted side by side on the rear of a vehicle body 2 equipped with a crawler traveling device 1, and a loading platform 6 is attached to the vehicle body so that it can be driven and oscillated around a horizontal axis on the front end side of the vehicle body using a cylinder 5, thereby constructing a transport work vehicle. It is composed.

As shown in FIG. 2, the electric circuit of the diesel engine 3 includes a switch 11 that is connected to the connection point a of the engine key 9 of the starter switch 8 to which the battery 7 is connected, and which is turned off when the dynamo 10 is activated. A charging circuit A equipped with a lamp 12 that indicates the state of charge by turning off is connected, a starting power supply circuit B equipped with an engine starting device 13 consisting of a starter motor is connected to the engine starting contact, and A switch mechanism 15 is provided in conjunction with the pedal 14 to detect that the transmission operation device for the driving drive wheels is in a non-transmission state by disengaging the clutch in conjunction with the depression operation of the pedal 14. An A contact 15a is interposed in the starting electric circuit B, that is, the switch mechanism 15 is configured to enable the engine starting device 13 to operate based on the detection that the transmission operating device is in the non-transmission state, and A mechanism 15 is configured to automatically switch the engine starting device 13 to an inoperable state based on the detection that the transmission operation device is in a transmission enabled state, so that when the user forgets to press the clutch pedal, the engine 3 This prevents the engine from starting.

A coil 16 is connected to the AC output terminal N of the dynamo 10, and when a current flows through the coil 16, the switch 11 is turned off, and a relay R is interposed in the circuit A, and the automatic switching mechanism 15
B contact 15b, a switch 18 that closes when the relay R is energized, and a power circuit C equipped with an alarm lamp 19 are connected to the contact a, and the engine key 9 is inserted into the contact a position. In this state, if the engine starting device 13 is in an inoperable state, the state is indicated as a warning by lighting a lamp 19, and the automatic switching mechanism 15 switches the starting device 13 to an inoperable state and then starts the engine 3. Then, when the engine key 9 is returned to the contact a position, the power supply circuit A of the charging display is in the OFF state and accordingly, regardless of whether the switching mechanism 15 detects that the engine starting device 13 is inoperable. Since the switch 18 is turned off, the lighting display of the lamp 19 is not performed.

Note that it is possible to select various targets for the transmission operation device, such as using the transmission as a transmission operation device for the drive wheels and setting the gear change switching state to a transmission enabled state.

It is also possible to target gasoline engines, or to target work vehicles equipped with a wheel-type traveling device. You can select various targets.

In summary, the work vehicle according to the present invention detects that the transmission operation device for the traveling device is in a non-transmission state, and
A mechanism is provided for automatically switching the engine starting device to an inoperable state based on detection that the engine starting device is in an operable state and that the transmission operating device is in a transmitting enable state, and the engine starting device is in an operable state. A warning lamp is provided to indicate that the engine is in a disabled state, and a switch is provided in the power circuit of the warning lamp that is turned off only when the power circuit of the lamp, which lights to indicate the state of battery charge accompanying engine operation, is turned off. Concerning the characteristics of things.

In other words, by disabling the engine from starting and lighting the lamp when the transmission operating device is in the state where transmission is possible, it is possible to reliably avoid dangerous situations associated with unexpected engine starting due to forgetting to operate the device, and also to It is now possible to easily visually check the status and quickly operate the device to the specified starting condition.

Moreover, simply detecting the transmission-enabled state of the transmission operating device would cause the warning lamp to light up when the engine is in the transmission-enabled state during normal engine operation, weakening the predetermined warning effect of that lamp; By effectively utilizing the charging circuit that is cut off, this drawback can be overcome with a simple configuration, and overall, by simply modifying the electrical system for the engine, accidents associated with engine starting can be reliably prevented. Became.

[Brief explanation of the drawing]

The drawings show an embodiment of a working vehicle according to the present invention, with FIG. 1 being an overall side view and FIG. 2 being an electric circuit diagram. 1... Traveling device, 13... Engine starting device, 15... Automatic switching mechanism, 18...
...Switch, 19...Warning lamp, A, C
...Power circuit.

Claims (1)

[Scope of utility model registration request] Based on the detection that the transmission operating device for the traveling device 1 is in the non-transmission state, the engine starting device 13 is enabled, and the engine starting device 13 is activated on the basis of the detection that the transmission operating device is in the transmission enabled state. A mechanism 15 for automatically switching the engine starting device 13 to an inoperative state is provided, and an alarm lamp 19 is provided to indicate that the engine starting device 13 is in an inoperable state. The working vehicle is equipped with a switch 18 that is turned off only when the power supply circuit A of the lamp 12 is turned off to indicate the state of battery charge.