JPH0115301Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention connects the right and left center portions of the lower end side of the weeding tool to its support rod, and connects the ultrasonic sensor for detecting the ground height of the reaping device to the above-mentioned portion above the support rod. Relating to a reaping harvester placed behind the weeding implements.

In the case of the above-mentioned reaping/harvesting machine, the weeding tool is firmly supported by connecting the lower end side of the weeding tool, where the largest weeding reaction force acts, and the left and right center portions of the tool to the support rod. However, conventionally,
Since the support rod was formed in a straight line, if the sensor was placed within the width of the weeding tool so that the stem culm would not get caught on it, the support rod would interfere with the sensor's transmission or reception. In addition, especially when performing so-called horizontal cutting work by moving the machine in a direction perpendicular to the planting direction of the stem culm,
The base of the planted stem culm may get behind the weeding tool, causing interference with the transmission and reception of sound waves by the sensor.
Problems such as false detections were becoming more likely to occur.

The purpose of the present invention is to make it possible to place the sensor within the width of the weeding tool, and to ensure that the sensor transmits and receives signals without being obstructed by the support rod or stem culm. The goal is to modify the support rod to something that is less likely to get tangled so that height detection can be performed with high accuracy.

A characteristic feature of the present invention is that in the above-mentioned reaping harvester, the support rod is provided with a loop portion having an opening at the rear thereof and bypassing the ultrasonic path of the sensor.

In other words, by forming a loop part on the weeding tool support rod and positioning it outside the ultrasonic path, the sound waves emitted from the sensor can be reflected by the support rod and received, and the reflected sound waves from the field can be This eliminates inconveniences such as not being able to receive signals due to interference from the rod, so the sensor can be placed within the width of the weeding tool.
It has become possible to effectively prevent the stem culm from getting caught in the sensor. Furthermore, by forming the part of the support rod located below the sensor into a loop shape, the stem culm located behind the weeding tool is pushed out of the ultrasonic path by the loop part. By providing an opening at the rear of the loop section, even if short leaves of the stem culm enter the loop section, they will not slip out through the opening and become entangled with the support rod.
In addition to the fact that the support rod does not interfere with the transmission and reception by the sensor as mentioned above, it also avoids the inconvenience that the sound waves emitted from the sensor are attenuated by the stem culm or do not reach the field, allowing for highly accurate height detection. It started to be done.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a self-propelled machine having a crawler-type traveling device 1 is equipped with a threshing section 2, a driving section 3, etc. Two weeding tools for separating weeds 4
a, 4b, three weeding tools 5 for separating the grain culms to be reaped into four pulling paths, four pulling devices 6 for the grain culms to be reaped, pulling up and reaping the grain culms A reaping pre-processing section including a device 7 and a conveying device 8 for supplying reaped grain culms to the threshing section 2 is connected to a cylinder 9.
It is connected to the front part of the self-propelled body in a state where it can be freely swung up and down, thereby forming a combine harvester capable of cutting four rows.

As shown in FIG. 2, an ultrasonic sensor 10 that transmits ultrasonic waves at set time intervals and receives reflected sound waves from the field is provided in the reaping pre-processing section, and the transmitting section of the sensor 10 10a
The height of the reaping device 7 above the ground is detected based on the time required from when the signal is transmitted until the receiving section 10b receives the signal, and the cylinder 9 is automatically operated so that the detection result is within a set range. , a device (not shown) for controlling the elevation of the reaping pre-processing section so that the height of the reaping device 7 from the ground is approximately constant is mounted on the self-propelled aircraft,
This allows work to be carried out while maintaining the stump height almost constant regardless of pitching of the machine.

In order to provide the weeding tool 4b on the right side of the machine body among both the weeding tools 4a and 4b, as shown in FIG. The left and right center portions of the lower end side of the tool 4b are connected by a stay 13.

When the sensor 10 is provided, the steps shown in FIGS.
As shown in the figure, the weed culm 4b is disposed behind the weeding tool 4b and above the support rod 12 to prevent the grain culm from getting caught on the sensor 10.
It is attached to the stay 14 attached to b.
Then, the ultrasonic wave path R of the sensor 10 is detoured to a portion of the support rod 12 located below the sensor 10, and the grain culm located behind the weeding tool 4b is exposed to the ultrasonic wave as shown in FIG. A loop portion 12a is provided to push the route R outward, and a loop portion 12a is provided at the rear of the loop portion 12a.
An opening 15 is provided to allow grain culm leaves etc. that have entered a to come out and prevent them from getting entangled with the support rod 12, and the transmission and reception of sound waves by the sensor 10 is located behind the support rod 12 and the weeding tool 4b. This allows the process to be carried out without being hindered by the grain culm.

To construct the weeding tool support rod 12, as shown in the above embodiment, if the support rod portion forming the loop portion 12a is formed into a curved shape that is located at a higher level toward the front and rear middle portions, as shown in FIG. As shown in the figure, it is advantageous that the support rod 12 acts as upwardly as possible on the culm to push apart the grain culm, thereby preventing breakage of the culm as much as possible.
It may be formed into a linear shape located at the same level as the proximal end side of No. 2.

Note that the present invention can also be applied to a harvester that harvests various stems and culms other than rice and wheat.

[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 front part of the combine, Fig. 2 is a schematic plan view of the pre-reaping processing section, and Fig. 3 is a side view of the sensor mounting section. Figure 4 is a plan view of the weeding tool support rod;
FIG. 5 is a front view showing the operating state of the support rod loop portion. 7... Reaping device, 10... Sensor, 12...
Support rod, 12a...Loop part, 15...Opening, R
...Ultrasonic path.

Claims (1)

[Claims for Utility Model Registration] The left and right center portions of the lower end side of the weeding tool 4b are connected to its support rod 12, and the ultrasonic sensor 10 for detecting the height above the ground of the reaping device 7 is connected above the support rod 12. The reaping/harvesting machine is arranged behind the weeding tool 4b, and the sensor 1 is attached to the support rod 12.
A reaping/harvesting machine characterized in that a loop part 12a that detours the ultrasonic path R of 0 is provided with an opening 15 at the rear thereof. The reaping harvester according to claim 1, wherein the support rod portion forming the loop portion 12a is formed into a curved shape that is located at a higher level toward the front and back middle portions.