JPH0444038Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is a method for detecting culm length in a combine harvester, which detects the culm length of grain culms in order to adjust the handling depth when transporting and supplying the harvested grain culms to a self-threshing type threshing device. Regarding equipment.

(b) Prior art Conventionally, a reverse method was used in which a clamping rod was installed between the threshing device mounted on the machine platform and the reaping device installed in front, which also served as a handling depth adjustment device, and was installed opposite to the conveyance belt, bypassing the ear transfer path. A grain conveying device supported by a U-shaped rod is installed,
A culm length detection device for a combine harvester in which a culm length detector is attached to the grain culm conveying device is already known.

(c) Problems to be solved by the invention In the culm length detection device in the known combine harvester, the culm length detector was disposed behind the inverted U-shaped rod, so that the ears of the grain to be transported were There is a problem that the grains collide with the inverted U-shaped rod and fall off, and
The above-mentioned collision causes a transfer delay on the ear side, and this transfer delay causes many ear breakages during threshing, and the amount of transfer delay varies depending on the hardness and softness of the grain culm, which causes problems such as inaccurate culm length detection. It was hot. In addition, straw debris etc. fell on the culm length detector, causing the detection unit and sensor arm to not operate smoothly.

(d) Means for solving the problem The present invention provides a clamping rod that also serves as a handling depth adjustment device and is installed opposite to the conveyor belt between the threshing device mounted on the machine platform and the reaping device installed in front. In a combine in which a grain culm transport device supported by an inverted U-shaped rod that bypasses the panicle transfer path is interposed, and a culm length detector is attached to the grain culm transport device, in the front part of the inverted U-shaped rod, A mounting member made of a plate with a downward U-shaped cross section is attached, and the sensor bar of the culm length detector is tilted in the direction of movement of the grain culm, and the tilting causes an inverted U-shape to the tip side. The above-mentioned problem was solved by pivoting so as to approach the lower surface of the shape rod 11.

(E) Action When the tip of the grain culm being conveyed by the conveying device presses the sensor bar of the culm length detector, the sensor bar tilts and approaches the bottom of the inverted U-shaped rod toward the tip; Thereby, the culm length detector detects the culm length.

Then, based on the detection result of the culm length detector, the grain culm conveying device is tilted via an automatic handling depth control circuit and a drive device controlled by it to adjust the handling depth.

When the sensor bar is activated, it guides the ear of the grain culm with its tip approaching the lower surface of the inverted U-shaped rod, so that the ear passes through the inverted U-shaped rod without colliding with it. do. Furthermore, while the grain culm is being transported, straw and dust fly up and tend to land on the culm length detector, but since the top surface of the culm length detector is covered by a mounting member with a downward U-shaped cross section, the detection part and sensor are covered. It does not adhere to the server or its pivot portion, and furthermore, even if it enters the mounting member, it will fall from the opening below.

(F) Example An example of the present invention will be explained with reference to the drawings.
A self-removal type threshing device is mounted on the machine base with a traveling device, similar to a conventional combine harvester, and in front of it are a cutting blade, a cutting body, a grain culm rake body, a grain culm pulling body 1, etc. A reaping device 2 consisting of
A grain culm conveying device 3 is interposed between the grain culm and the threshing device to convey and supply the harvested grain culm to the threshing device.
A stock-side clamping conveyance body 6, which has a conveyor chain 7 with a lug and a guide rod 8 disposed oppositely, and a panicle side conveyor body 9,
The holding rod 5 and the guide rod 8 are attached to an inverted U-shaped rod 11 whose base is fixed to the frame of the grain culm conveying device 3. .

Further, a stalk detection switch 12 installed near the tip of the inverted U-shaped rod 11 faces between the clamping rod 5 and the guide rod 8, and detects whether grain culms are being conveyed or not. A culm length detector 13 is attached to a portion corresponding to the guide plate 10.

Then, as shown in FIGS. 1 to 3, a mounting plate 14 for mounting the culm length detector 13 is fastened to a bracket 15 projecting forward from the inverted U-shaped rod 11 with a mounting nut 14a, and the culm length detector 13 is mounted on the mounting plate 14. A pair of detectors arranged in the direction of the inverted U-shaped rod 1 of the frame 16
A reed switch 17 is enclosed near the top of the frame, a sensor bar 18 whose base is rotatably supported by a support shaft 19 in the opening of the frame body 16, and the sensor bar 18.
A magnet 20 is attached in an enclosed state to the tip of an arm protruding from the base of the reed switch 17 toward the inverted U-shaped rod 11, and is opposed to the reed switch 17, and pivotally supports the sensor bar 18. The frame bodies 16 are attached as a pair by fitting the front portions into the holes 21, 21 of the mounting plate 14 at intervals in the culm direction.

In the above-mentioned culm length detection device, the grain culm conveying device 3
When the harvested grain culm is being transported, the stalk detection switch 12 detects the grain culm, and if the handling depth is appropriate, the lower sensor bar 18 of the culm length detector 13 is guided by the support guide plate 10. The second grain is pushed by the ear of the grain culm.
By rotating as shown by the chain line in the figure, the magnet 20 is separated from the reed switch 17 and is in the detection state in a non-contact state, and the upper sensor bar 18 does not come into contact with the spike and is in the detection state as shown by the solid line. In the hanging position, the magnet 20 approaches the reed switch 17 and is in a non-detection state.

In addition, in the shallow handling state, both the upper and lower sensor bars 18, 18 become non-detecting state (short culm detection state) and a deep handling signal is emitted, and furthermore, in the deep handling state, the upper and lower sensor bars 18, The servers 18, 18 are both pushed by the panicles and tilted backwards, and the magnet 20 is placed in a long culm detection state away from the reed switch 17, and shallow handling adjustment is performed.

Furthermore, the magnet 20 returns as a weight when returning from the detection posture shown by the chain line in FIG. 2 to the non-detection posture shown by the solid line, and does not require the force to turn on the switch at the time of detection, unlike conventional ones. Therefore, the resistance to the ears of the grain culm being transported during detection is small.

Furthermore, even if water droplets or dust adhere to the detection section, malfunction will not occur because the switch is a reed switch and is non-contact type.

When the sensor bars 18, 18 are pushed and tilted by the ears of the grain culms being conveyed, their tips enter the lower side of the inverted U-shaped rod 11, so that the sensor bars 18, 18 Since the ears are guided so that they do not come into contact with the inverted U-shaped rod 11, the ears do not collide with the inverted U-shaped rod 11 and are shed, and the ears are prevented from being transferred due to obstacles before the tips are detected. Since the transfer is not caused and is only subjected to the detection resistance, there is only a slight delay in transfer.

Further, even if straw, dust, etc. fly up during the reaping and threshing work, they are caught by the top plate of the mounting plate 14 and do not attach to the culm length detector 13, and do not enter into the mounting plate 14. Even if the culm length detector 13 falls, the culm length detector 13 will not malfunction because it will fall from the opening at the bottom.

(G) Effects of the invention The present invention has a mechanism that also serves as a handling depth adjustment device between the threshing device mounted on the machine base and the reaping device 2 installed in front, and also connects a clamping rod installed opposite to the conveyance belt to the ear section transfer path. A grain culm transport device 3 supported by an inverted U-shaped rod 11 bypassing the grain culm transport device 3 is installed, and a culm length detector 13 is installed in the grain culm transport device 3.
In the combine harvester, a mounting member made of a plate having a downward U-shaped cross section is attached to the front part of the inverted U-shaped rod 11, and the sensor bar of the culm length detector 13 is attached to the inside of the mounting member. 18 is tilted in the grain culm movement direction and pivoted so that the tip approaches the lower surface of the inverted U-shaped rod 11 by tilting, so there is no delay in the tip before detecting the culm length.
The culm length can be reliably detected regardless of the hardness or softness of the grain culm.

Moreover, the sensor bar 18 of the culm length detector 13 is
When tilting to detect the culm length, the panicle is guided so as not to come into contact with the inverted U-shaped rod 11.
It is possible to reliably prevent shedding.

Furthermore, the ears of the grain being transported are only subjected to resistance for detecting the length of the culm, and are not subjected to resistance from the inverted U-shaped rod, which minimizes ear tip lag and increases the chance of ear breakage during threshing. It is possible to prevent this from happening.

Furthermore, during the reaping and threshing work, a large amount of straw and dust is generated and blown up, but these are caught by the top plate of the mounting member, which has a downward U-shaped cross section and is made of a plate, so that the straw and other dust can be removed from the culm. Accurate culm length detection can be maintained by preventing adhesion to the detector, and even if straw debris etc. enters the mounting member, they will fall from the opening at the bottom and will not interfere with detection. There is no.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a front view of the detection device, Fig. 2 is a side view of the same, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a perspective view of the grain culm conveying device and grain culm lifting body of the combine. , FIG. 5 is a side view of the conventional example. 3...Grain culm transport device, 6...Stock base transport body, 9...
... panicle side conveyor, 10 ... leaning guide plate, 13 ... culm length detector, 17 ... reed switch, 18 ... sensor bar, 20 ... magnet.

Claims (1)

[Scope of utility model registration request] An inverted U-shaped rod 11 is installed between the threshing device mounted on the machine base and the reaping device 2 installed in front, which also serves as a handling depth adjustment device and is installed opposite to the conveying belt, by an inverted U-shaped rod 11 that bypasses the ear transfer path. In a combine in which a supported grain culm conveying device 3 is interposed and a culm length detector 13 is attached to the grain culm conveying device 3, a plate having a downward U-shaped cross section is provided at the front part of the inverted U-shaped rod 11. The sensor bar 18 of the culm length detector 13 is tilted in the direction of movement of the grain culm, and the tip side approaches the lower surface of the inverted U-shaped rod 11 by tilting the sensor bar 18 of the culm length detector 13 inside the mounting member. A culm length detection device for a combine harvester, characterized in that the culm length is pivotally supported in the following manner.