JPS62258823A - Working vehicle - Google Patents

Abstract

PURPOSE:To allow the self-travel transfer safely in a narrow area by automatically stopping the travel when the change of the longitudinal tilt angle of a vehicle body within a predetermined time is a preset value or more in a working vehicle such as a combine. CONSTITUTION:The presence of the lateral displacement of a machine against grain straws to be reaped and the displacement direction are detected by a displacement detecting mechanism 7 and entered into a control means 19. On the other hand, the longitudinal tilt angle of the machine is detected by a sensor 12, and the tilt angle change is determined by a detecting means 18 and entered into the control means 19. The control means 19 judges whether the tilt angle change is a preset value or more, and if it judges that there is a change, it outputs signals to a stop unit drive circuit 15, a clutch operating circuit 11 and a buzzer drive circuit 17 for the engine stop, buzzer warning, and travel stop. According to this constitution, self-travel transfer is allowed safely in a narrow area.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a work vehicle such as a combine harvester.

[Conventional technology]

As shown in Fig. 5, when the machine (^) is driven by itself on the footboards (21) and loaded onto the carrier platform (20), or when it is taken out from inside the field onto the ridge (not shown), the footboards form the structure. However, when climbing a narrow and steeply sloped slope to a high level, and when the aircraft transfers from the footboard to the loading platform or to the transfer destination on the shore, the center of gravity of the aircraft changes due to the angular difference between the footboard and the transfer destination. The aircraft's center of gravity suddenly changes from the tilted forward position when it is on the footboard to a horizontal position where the center of gravity of the aircraft has shifted to the destination. For this reason, piloting the aircraft while boarding the aircraft can be frightening, so self-propelled transfers to high places are sometimes carried out while operating from outside the aircraft without being on board, which can lead to the following troubles: there were.

[Problem that the invention seeks to solve]

If the length of the aircraft at the destination is relatively short in the longitudinal direction, such as when the loading platform is short and the side 11 is narrow, there may be a gap between the front end of the aircraft and the tip of the transfer when the aircraft is transferred from the footboard to the destination. This is because there is not much room at the transfer destination to allow the aircraft to move on its own, and because the aircraft is controlled from outside the aircraft, it is difficult to quickly stop the aircraft after it has been transferred to the transfer destination. In some cases, there was a delay in stopping the aircraft after it had transferred to the transfer destination, causing the aircraft to collide with the wall at the front end of the loading platform or fall onto the opposite side of the ridge from the climbing side.

Our goal is to provide work vehicles that can do all the work.

[Means for solving problems]

The characteristic structure of the work vehicle according to the present invention is that it is provided with a sensor that detects the longitudinal inclination angle of the machine body, and a detection means that detects a change in the detected angle by this sensor by more than a set value within a set time. The vehicle is provided with a traveling stop means that automatically stops traveling when the change is detected, and its functions and effects are as follows.

[For production]

As the center of gravity of the aircraft moves from the footboard to the transfer destination, it rapidly changes from the forward upward tilted position when it was on the footboard to the horizontal or almost horizontal position at the transfer destination. The set time and the set value are each set so that the change is detected by the detection means.

Then, when the aircraft moves to the transfer destination, the stopping means is automatically activated to stop the aircraft from traveling.

〔Effect of the invention〕

By automatically stopping traveling when the aircraft transfers to the transfer destination, even if the transfer destination is narrow, there is no possibility of the aircraft colliding with the wall of the transport vehicle loading platform due to a delay in the operation of stopping the vehicle, or if the transfer destination is narrow. It is now possible to prevent the aircraft from falling onto the side, and it is now possible to safely load the aircraft onto the platform of a transport vehicle or take it out onto the ridge.

〔Example〕

As shown in Figure 3, the reaping pre-processing section (1) raises the planted culm, reaps it, and transports the cut culm to the rear of the machine.
are provided at the front part of a traveling body having a crawler traveling device (2), a threshing section (3), a riding type vertical section (4), etc., to constitute a combine harvester.

As shown in Fig. 4, a pair of contact-type rocking sensors (5), (5) provided at the front end of the reaping pre-processing section (1) so as to act on the culm to be reaped, act on the culm to be reaped. The presence or absence of lateral displacement of the aircraft body and the direction of the displacement are detected, and the detection results are electrically taken out by a pair of switches (6), (6) which are individually linked to the pair of sensors (5), (5). The displacement detection mechanism (7) is configured as shown in FIG.
) is connected via the control device (8) to a pair of aircraft running clutches (
10a) and (10b) are connected to the running circuit (11).

A gravity type inclination sensor (12) attached to the traveling aircraft to detect the longitudinal inclination angle thereof is connected to the drive circuit (15) of the engine (13) stop device (14) via the control device (8). , and is linked to a drive circuit (17) for an alarm buzzer (16), which is an example of a sounding alarm device. Means (18) for detecting a change in the angle detected by the tilt sensor (12), and automatically outputting an operation signal to the drive circuits (15) and (17) based on the detection result by the detection means (18). The engine stop device (14
) and alarm buzzer (16), and automatically outputs operation No. 16 to the operation circuit (11) based on information from the displacement detection mechanism (17). The control device (8) is constituted by a microcomputer so as to include a control means (19) for operating the clutches (10a) and (10b).

The control means (19) controls the pair of aircraft based on the information from the displacement detection mechanism (7) so that the displacement detection mechanism (7) is in the detection state of no displacement.
(10b) is configured to be automatically operated. In other words, the machine is automatically oriented so that it travels along the rows of culms to be harvested.

As shown in FIG. 5, the pair of sensors (5), (5) are installed when the aircraft is self-propelled on the footboard (21) to a destination such as the carrier platform (20). To automatically steer the crawler traveling device (2) so that it does not come off the footboard (21) by switching from a usage posture in which the culm is the detection target to a usage posture in which the footboard (21) is the detection target. It is configured so that it can be done. During this aircraft transfer, as shown by the imaginary line in Figure 5, the aircraft moves to the footboard (21).
When the vehicle is transferred from the vehicle to the carrier platform (20), a warning is automatically issued and the vehicle stops traveling.

That is, the control device (8) operates based on a program as shown in FIG. 2 to automatically operate the alarm buzzer (16) and the engine stop device (14). That is, the detected angle by the tilt sensor (12) is inputted into the first setter (22) every set time (1), and the detected difference between the previous detected angle (θ.) and the subsequent detected angle (θ1) is calculated. (θh)
By calculating the detected angle difference (θ7) and the setting value (θα) by the second setting device (23),
The setting time of the detection angle by the tilt sensor (12) (
1), the presence or absence of a change greater than the set value (θα) is detected. Detection means (
18), the control means (19) automatically operates the alarm buzzer (16) and the engine stop device (14). Therefore, when the aircraft transfers onto the transport vehicle loading platform (20), due to the movement of the center of gravity of the aircraft from the footboard to the loading platform and the angular difference between the walking board (21) and the transport vehicle loading platform (20). The detection sensor (1) is activated when the front tilting position changes from the forward tilting position when the vehicle is on the loading platform (21) to the position on the loading platform (20) as shown by the imaginary line in Figure 5.
In order to ensure that the change detected by 2) corresponds to the change detected by the detection means (18), the settings are made in consideration of the angular difference between the footboard (21) and the carrier platform (20) and the traveling speed of the aircraft. The time (t) and the set value (θα) are each set. Then, when the aircraft transfers to the loading platform (20),
The warning buzzer (16) is automatically activated and the engine (13) is stopped.

[Another example]

In addition to means for stopping the engine, means for disengaging the running clutch, means for engaging and operating the running brake,
Alternatively, a means for switching the driving transmission to a neutral state may be employed. Furthermore,
A logic circuit configuration other than a microcomputer may be employed for automatic control. Accordingly, the controller
The first stage (19) is referred to as travel stop means (19).

In addition to combines, the present invention can also be applied to various types of work vehicles such as construction vehicles.

[Brief explanation of drawings]

The drawings show an embodiment of the working vehicle according to the present invention, in which Fig. 1 is a block diagram of the control system, Fig. 2 is a flowchart, Fig. 3 is a side view of the front part of the combine, and Fig. 4 is a diagram of the pre-reaping processing section. A schematic plan view, and FIG. 5 is a side view of the loaded state. (12)...Sensor, (18)...
Detection means, (19)... Travel stop means.

Claims (1)

[Claims] A sensor (12) that detects the longitudinal inclination angle of the aircraft, and
A detection means (18) is provided for detecting a change in the angle detected by this sensor (12) by a set value (θα) or more within a set time (t), and when this detection means (18) detects the change, it automatically A working vehicle is provided with a traveling stop means (19) for stopping traveling at a certain time.