JPS631782Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides an automatic control mechanism that maintains the height of the work equipment above the ground within a set range, and also provides priority to the automatic control mechanism while maintaining this automatic control mechanism in an operating state. The present invention relates to a working device operating structure for a working vehicle that enables manual lifting and lowering of the device and manual lifting and lowering of the working device with the automatic control mechanism inactive.

For example, in the case of combine harvesters, when working with the automatic elevation control of the pre-harvesting section, when turning the machine on a headland, the working level is adjusted to prevent the pre-harvesting section from touching the ground due to machine vibration. The pre-harvesting treatment section will automatically control the weeding tool to ensure that it goes under the lodging grain culm when the weeding tool is moved upward and stopped at that level, and if there is a place where the grain culm is significantly lodging. It is operated to descend from the level maintained by , and is also operated to stop at that level. However, in the past, switching the automatic control mechanism between the activated and non-activating states and raising and lowering the pre-reaping treatment section were performed using separate operating levers, so as mentioned above, when reaping is in the automatically controlled state, Stop the pre-processing section from rising,
There was a drawback that two operating levers had to be operated in order to lower and stop, which was time-consuming.

In view of the above-mentioned circumstances, the present invention has been developed by making it easy to switch the automatic control between active and non-active states and to raise and lower the working equipment, and by arranging the operating position rationally. The purpose of the present invention is to make it possible to easily operate a working device and an automatic control mechanism when starting and finishing work.

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

As shown in FIG. 1, a crawler type traveling device 1,
A weeding tool 4 for dividing the planted grain culm into objects to be reaped and objects not to be reaped, a device 5 for raising the grain culm to be reaped, on the front part of the traveling machine body having the threshing section 2, the driving section 3, etc. A reaping pre-processing section 8 having a device 6 for raising and reaping grain culms and a conveying device 7 for supplying the reaped grain culms to the threshing section 2 is connected to the reaping pretreatment section 8 so as to be capable of swinging up and down operation by a single-acting fluid pressure cylinder 9. A combine harvester is configured.

As shown in FIG. 2, a first control valve for manually operating the cylinder 9 is provided.
V ₁ and an electromagnetic second control valve V ₂ for automatic operation, and the second control valve V ₂ is connected to the first control valve V ₁
By connecting the cylinder 9 so that fluid is supplied only when it is in the neutral state, operation by the second control valve V ₂ of the cylinder 9 is possible only when the first control valve V ₁ is in the neutral state. It is structured as follows. In addition, in the reaping pretreatment section 8, the bracket 1 attached to the weeding tool support rod 10 is
A vertically swingable ground sensor 12 and a potentiometer 13 linked to the sensor 12 are attached to the ground sensor 1 to detect the height of the pre-reaping treatment section 8 from the ground based on the angle of the sensor 12 with respect to the bracket.
A pre-processing unit height detecting device is configured to electrically take out the detection result, and a second control unit is configured to maintain the height of the reaping pre-processing unit 8 above the ground within a set range based on information from this detecting device. A control mechanism 14 for automatically operating the control valve _V2 is linked to the electromagnetic operating section of the second control valve _V2 . Also, a first switch 15 for operating the control mechanism 14 into an active state and a second switch 16 for operating the control mechanism 14 into a non-active state.
is controlled by the control mechanism 14 via the flip-flop circuit 17, which maintains the control mechanism 14 in an activated or non-activated state when one switch 15 or 16 is operated until the other switch 16 or 15 is operated. so that when the first switch 15 or the second switch 16 is operated, the second control valve _V2 is maintained in the operating state or the non-operating state until the second switch 16 or the first switch 15 is operated. By operating the first control valve V ₁ and the first and second switches 15 and 16 based on the operation structure described in detail below, the reaping pre-processing section 8 can be automatically raised and lowered. The automatic control system is maintained in an operating state and the reaping pre-processing section 8 is manually raised and lowered in priority to the automatic control system. With the system inactive, it is possible to manually raise and lower the pre-reaping treatment section 8 and to stop it at that level.

That is, as shown in FIGS. 3 and 4, the swing operation member ₁ of the first control valve V1
8 is interlocked with the rotation support shaft 22 of the operating lever 21 via the push/pull rod 19 and the swing arm 20,
As shown in FIG. 5, when the operating lever 21 is located at approximately the middle position N of the series of operating paths 24 formed in its guide 23, the first control valve V1 is in the neutral state and the operating lever ₂₁ is in the neutral state. Lever 2
When the control lever 1 is swung from the intermediate position N to the operating range UP on the one end side, the first control valve V ₁ rises, and the operating lever 21 is moved from the intermediate position N to the operating range DN on the other end side. When the first control valve V1 is swung inwards, the first control valve _V1 is brought into a lowered state. Then, a pressing operation arm 2 for the first and second switches 15 and 16 is provided.
5 extends from the mounting boss portion 20a of the swing arm 20 relative to the rotation support shaft 22 so as to swing integrally with the operating lever 21, and both switches 1
5 and 16 are distributed and arranged on both sides of the operating arm 20, and the operating lever 21 is moved to the upper operating range UP.
When the switch is turned OFF at the position corresponding to the end of the operation path 24, the second switch 16 becomes operational.
Further, when the operating lever 21 is operated to a position ON corresponding to the end of the operating path 24 in the lower operating range DN, the first switch 15 is configured to be in an operating state.

In other words, even if the operating lever 21 for the first control valve V ₁ is used to control the first and second switches 1
5 and 16, while operating the first switch 15 while operating the first control valve V ₁ in the downward state, or operating the second switch 15 while operating the first control valve V ₁ in the upward state. A switch 16 can be operated.

Further, as shown in FIGS. 4 and 6, a helical spring 26 that provides rocking resistance to the operating lever 21 is attached to the support shaft cylinder support shaft 28 fixed to the machine frame 27. , the spring 2
6 at its end 26a or 26b so that it does not rotate.
A stopper 29 for locking extends from the cylinder support shaft 28, and as the operating lever 21 is operated, it comes into contact with the end 26a or 26b, elastically deforming the spring 26, and causing the operating lever 21 to swing. The spring operating arm 30 that applies dynamic resistance is extended from the boss portion 20a, and begins to act as the operating lever 21 reaches the first switch operating position ON or slightly before the second switch operating position OFF. and configured so that the lever operation resistance when operating the first switch 15 or the second switch 16 together is greater than the lever operation resistance when operating only the first control valve _V1 . Therefore, the first switch 15 and the second switch 1 are activated when the pre-reaping processing section 8 is raised and lowered.
6 is intended to prevent erroneous operation.

The cylinder 9 can be changed to a fluid pressure motor, an electric motor, etc., and these are collectively referred to as a drive mechanism 9, and the first control valve V ₁ is connected to a human operation section V ₁
, and the second control valve V ₂ is referred to as an automatic operation section V ₂ .

Further, the operation structure described above can also be applied to a device for raising and lowering a tilling device or a seedling planting device with respect to this machine, and the pre-reaping processing section 8 is referred to as a working device 8.

In summary, the working device operating structure for a working vehicle according to the present invention includes a manual operating section V ₁ and an automatic operating section V that maintains the height of the working device 8 above the ground within a set range in the working device lifting mechanism 9. ₂ is attached in such a state that the drive mechanism can be operated by the automatic operation section V ₂ only when the manual operation section V ₁ is in a neutral state, and when the manual operation section V 1 is operated, the automatic operation section V ₂ is activated. a first switch 15 for maintaining the automatic operating section V _{2 in a non-operating state, and a second switch 16 for maintaining the automatic operating section V 2} in an inactive state when operated, and a series of operating levers 21 for the manual operating section V ₁ are provided. In the operating path 24, an ascending operating range UP is provided at one end with the operating position OFF of the second switch 16 located at a part of the end of the route, and a descending operating range DN is provided at the other end of the route. It is characterized in that the first switch 15 is provided at a part of the end so that the operating position ON is located.

In other words, the operating lever 2 for the human operating part V ₁
1, the first and second switches 15 and 16 can be operated, so that the automatic control can be switched from one of the working state and the non-working state to the other as described above, and the operation for raising and lowering the working device 8 can be performed. This can now be done simply by operating one of the levers 21, and as a result, the work can be done more efficiently from an operational standpoint.

Generally, when starting work, the working device 8 is manually lowered to the working level or a position close to it, and the automatic control system is switched to the operating state, and when the work is finished, the automatic control system is Switching the system to a non-operating state and operating the working device 8
is raised to a non-working level. In view of this,
The operating position of the first switch 15 is set to ON in a part of the lowering operating range DN of the operating lever 21, and the operating position of the second switch 16 is set to OFF in a part of the ascending operating range UP. In order to start or end the operation, the operating device 8 is raised or lowered, and the automatic control system is switched from one of the working state and the non-working state to the other. It is now possible to easily operate the aircraft by simply moving it slightly in the descent operation area DN, and as a result, it has become possible to easily and quickly adjust the aircraft to a working state or a non-working state from the operational perspective.

[Brief explanation of the drawing]

The drawings show an embodiment of the working device operating structure for a working vehicle according to the present invention, in which Fig. 1 is a side view of the front part of the combine, Fig. 2 is a fluid pressure circuit diagram and a block diagram of the cylinder control system, and Fig. 3 is a block diagram of the cylinder control system. FIG. 4 is a front view of the operating lever mounting part, FIG. 5 is a plan view showing the operating position, and FIG. 6 is a side view showing the operating structure of the first control valve.
The figure is a cross-sectional view taken along the - arrow in FIG. 4. 8... Working device, 9... Drive mechanism, 15... First switch, 16... Second switch, 21... Operating lever,
24...Operation path, V ₁ ...Manual operation section, V ₂ ...Automatic operation section, UP...Up operation area, DN...Down operation area, ON
...First switch operating position, OFF...Second switch operating position.

Claims (1)

[Scope of utility model claims] The drive mechanism 9 for lifting and lowering the work equipment includes a human operation unit V ₁ ,
And, the drive mechanism can be operated by the automatic operation unit V ₂ only when the manual operation unit V ₁ is in a neutral state, so that the automatic operation unit V ₂ that maintains the height above the ground of the working device 8 within a set range is set. a first switch 15 that maintains the automatic operating section V ₂ in an activated state as it is operated; and a first switch 15 that maintains the automatic operating section V ₂ in an inactive state as it is operated; A second switch 16 is provided, and in a series of operating paths 24 of the operating lever 21 for the human operating section _V1 , an upward operating range UP is set at one end, and an operating position OFF of the second switch 16 is set at a part of the end of the route. and a lowering operation area at the other end.
The first switch 1 connects the DN to a part of the end of the path.
5. A working device operating structure for a working vehicle, characterized in that it is provided in a state where the operating position ON is located.