JPS6138414Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention comprises a crawler traveling device, a threshing device mounted on the top of the crawler traveling device, a reaping device that cuts the base of a planted stem culm at the front of the crawler traveling device, A stump following sensor is attached to the support frame of the reaping device and detects the height of the reaping device by contact with the stump end surface, and the reaping device is maintained at a set height based on the detection result of the stump following sensor. The present invention relates to a reaping harvester equipped with a lifting and lowering control mechanism.

A reaping harvester equipped with a stump tracking sensor automatically stabilizes the cutting height based on the stump height.Theoretically, this means that the harvester can automatically stabilize the cutting height based on the stump height. It is said that highly accurate detection can be obtained without any interference.

Therefore, when looking at conventional means, this sensor was attached to the outside of the frame on the mowed field side of the reaping device so that it could move up and down (for example,
Publication No.).

However, in this conventional structure, firstly, the sensor is placed on the side of the mown field to detect stumps in the mowed field, so it is rather impractical for accurate detection. In other words, the stumps on the mowed field have been trampled by vehicles, etc., and their heights vary from place to place, and straw and weeds have accumulated, making it difficult to accurately detect the height. It is. Secondly, since the sensor is simply mounted so that it can move up and down, there is a tendency for the stem culm to be cut higher than the desired height due to a delay in operation, even though the reaping device is automatically raised and lowered due to sudden pitching of the machine, etc. I had a problem with this.

This idea was developed in light of these circumstances,
The purpose is to automatically stabilize the cutting height regardless of pitching of the machine or fluctuations in the amount of sinking into the mud. The aim is to automatically stabilize the cutting height in a highly accurate state.

A feature of the technical means of the present invention taken to achieve the objective is that, in the above-mentioned reaping harvester, the stump following sensor is provided between the crawler traveling device and the reaping device and within the cutting width of the reaping device. In addition, as the aircraft advances, the stump is biased downward with a biasing force sufficient to retain and bend the stump in the direction in which the aircraft moves, and the following effects are achieved.

In other words, the stump tracking sensor is installed within the cutting width of the reaping device and between the reaping device and the crawler traveling device, and it follows the stump immediately after it has been cut by the reaping device, so it does not prevent stumps from being stepped on by the traveling device. It is possible to detect stumps in situations where there are no external disturbances such as dust, straw, and weeds. It has the advantage of being significantly improved compared to other devices. Moreover, according to the present invention, the sensor is biased downward with a force sufficient to bend the stump in the direction of the aircraft's movement as the aircraft moves forward. As mentioned above, despite raising and lowering the reaping device based on sensor information, the height of the target stump that the sensor comes into contact with is due to the fact that the stem culm is cut higher than the desired height due to the operation delay. Even if the cutting height is higher than the desired height, the sensor will automatically maintain the desired cutting height by contacting the stump with the stump in a more curved state as the stump is higher than the desired height. It has become something that can be done. To elaborate further,
Generally, the shape-retaining strength of a stump is greater at its base, and the stump that is higher than the desired height will be bent more by contact with the sensor. As a result, even if the height of the target stump is higher than the desired height, the sensor will always be maintained in approximately the same state as the state in which it is in contact with the stump of the desired height. The cutting operation can be performed at a desired cutting height regardless of variations in the height of the stump, making it more convenient to use.

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

As shown in FIGS. 1 and 2, the stems are introduced into a pair of left and right stalk introduction paths A ₁ and A 2 at the front of the vehicle body equipped with a crawler traveling device 1, a threshing device 2, a driver's seat ₃ , etc. A device 4 for pulling up the stem culm, a clipper-shaped cutting blade 5 which is a reaping device for cutting the base of the pulled stem culm, auxiliary conveyance devices 6a and 6b for transferring the cut stem culm backwards and merging them, and merging. A reaping pre-processing section is provided, which includes a rear transport device 7, etc., which transports the stalk culms that have been harvested toward the threshing device 2, and as the machine advances, the stalk culms planted in the field are harvested and then threshed. The system is configured to automatically perform the following tasks in succession.

The support frame 8 of the reaping pretreatment section is pivotally supported to the vehicle body by a hydraulic cylinder 9 so as to be swingable around the horizontal axis X. As shown in FIG. 3, the frame 10 attached to the support frame 8 has a stump follower that contacts the stump between the crawler traveling device 1 and the cutting blade 5 and within the cutting width of the cutting blade 5. The sensor 11 is connected to a pair of front and rear swinging arms 12.
a, 12b so that it can move up and down in a parallel position, and is attached so that it is biased downward by a spring 13 with a force sufficient to bend the stump in the lower arm in the direction of the aircraft's movement as the aircraft advances. . Further, the front side swinging arm 12a and the swinging operation arm 14a of the control valve 14 of the hydraulic cylinder 9 are connected by a wire 1.
5, they are interlocked and connected. When the height of the sensor 11 relative to the cutting blade 5 is within a set range, the control valve 14 is set to a neutral state in which the operation of the hydraulic cylinder 9 is stopped; when the height is below the set range, the control valve 14 is set to the neutral state. When the hydraulic cylinder 9 is shortened and the reaping pre-treatment section is lowered, and further out of the setting range, the control valve 1 is activated.
4 is configured to extend the hydraulic cylinder 9 and switch to a state in which the reaping pre-processing section is raised, and the cutting blade 5 attached to the reaping pre-processing section is
The cutting height is automatically maintained at a set height relative to the stump, thereby stabilizing the cutting height.

In short, by automatically raising and lowering the pre-cutting section in order to stabilize the cutting height based on the stump, it is possible to avoid the negative effects of foreign matter such as irregularities and straw waste present in the field. The mowing height can be stabilized with high precision while avoiding the above-mentioned problems, and in addition, the sensor 11 is attached with enough attachment to bend the stump in the direction of the machine's movement as the machine advances. By applying force, for example, if the machine body suddenly pitches, the stem culm may be cut higher than the desired height due to a delay in operation despite the above-mentioned automatic lifting and lowering of the pre-harvesting section. etc., the sensor 11
Even if the height of the target stump that the sensor 11 contacts is higher than the desired height, the sensor 11 will contact the stump with the stump higher than the desired height in a state where the sensor 11 is bent and locked to a greater degree, so that The cutting height can be maintained automatically.

The frame body 10 is pivotally supported to be vertically swingable around the horizontal axis V, and is biased downward by a helical spring 16, and the frame body 10 and the guide frame 17
A swinging lever 18 that can be locked and held at a desired swinging position is interlocked and connected with a wire 19.
By swinging the lever 18, the sensor 1
The structure is such that the front and rear inclination posture of the first reaping pre-processing section can be changed and adjusted. In other words, when working in wet fields where the vehicle body sinks deep into the mud, if the reaping pretreatment section is raised by swinging relative to the vehicle body,
Although the ground attitude of the sensor 11 deviates from the desired horizontal attitude, it is possible to correct this.

In addition, 20 in the figure is the valve operating arm 14a which is biased by the sensor 11 to perform a lowering operation.
is a lever for operating a valve that is operated by a locking pin 21 to lock and move while being lifted, and is configured to be operable to a raised position U, a raised/lowered stop position N, and a lowered position D. When automatically operating the valve operating arm 14, the locking pin 21 is connected to the valve operating arm 14.
It is configured so that it can be operated to an automatic position A where it does not come into contact with a.

Furthermore, the spring 13 that biases the sensor 11 downward as described above is connected to the front swing arm 12a and the valve operating lever 20 at the end of a wire 23 which is flexibly connected through the long hole 22. When the lever 20 is operated to the automatic position A, the spring 13 exerts a predetermined biasing action, and conversely, the lever 20 is moved to the other positions U, N, and D. Spring 1 when operating
3 is released so that the lever 20 can be operated smoothly with a small operating force while moving the sensor 11 up and down.

FIG. 4 shows another embodiment, in which the lower surface of the sensor 11 is provided with protrusions 24 along the width direction of the fuselage at appropriate intervals in the traveling direction of the fuselage for the purpose of locking stumps. The structure is such that the stump can be reliably locked and bent even with force.

In the embodiment, in order to raise and lower the cutting blade 5 as a reaping device based on the information of the sensor 11, the reaping pre-processing section is raised and lowered, but at least only the reaping device 5 needs to be raised and lowered. be.

Furthermore, in the embodiment, the elevating operation control mechanism is constructed by connecting the sensor 11 and the control valve 14 of the elevating hydraulic cylinder 9 by a mechanical linkage mechanism using the wire 15. ,for example,
Other configurations may be used, such as a configuration in which the height of the sensor 11 relative to the reaping device is detected by an electric switch and the control valve 14 is operated based on this detection signal.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping harvester according to the present invention, in which Fig. 1 is a side view of the combine, Fig. 2 is a schematic plan view of the reaping pretreatment section, and Fig. 3 is the linkage between the stump tracking sensor and the control valve. FIG. 4 is a partially cutaway side view of another embodiment. 1... Crawler traveling device, 2... Threshing device, 5
... Reaping device, 11 ... Stump following sensor, 24
...protrusion.

Claims (1)

[Claims for Utility Model Registration] A crawler traveling device 1, a threshing device 2 mounted on the top of the crawler traveling device 1, and a reaping device 5 for cutting the base of a planted stem culm at the front of the crawler traveling device 1. and a stump tracking sensor 11 which is attached to the support frame 8 of the reaping device 5 and detects the height of the reaping device 5 by contact with the end surface of the stump.
In the reaping harvester, the stump following sensor 11 is connected to the crawler traveling device 1 and the reaping device in a reaping/harvesting machine equipped with a mechanism that controls the elevation and descent of the reaping device 5 to maintain it at a set height based on the detection result of the stump following sensor 11. 5 and the reaping device 5
A reaping/harvesting machine characterized in that it is provided within the cutting width of the machine and is biased downward with a biasing force sufficient to retain and bend the stump in the direction of the machine's movement as the machine advances. According to the utility model registration claim 1, the lower surface of the sensor 11 is provided with protrusions 24 along the width direction of the fuselage at appropriate intervals in the traveling direction of the fuselage for locking stumps. Reaping harvester.