JPH0111008Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, a sensing device for a dropper in a combine harvester and a device that rotates downward and focuses and discharges each time the amount of collected culm reaches a certain weight are already known, but this weight-sensing type dropper is There was a drawback that the amount of waste straw fluctuated significantly depending on whether it was wet or dry.

Therefore, a sensor was installed at the top of the dropper, and a sensing rod was hung from the sensor to the tip of the dropper to surround the focusing space and sense the amount of focusing, and the dropper released the focusing culm and focused. When the culm returns to the culm position, straw may remain at the tip of the rod that makes up the dropper, or it may bend and get caught (especially in the case of lodging grain culms). This resulted in a drawback that the sensing rod's operation was obstructed during focusing.

The purpose of the present invention is to improve the above-mentioned drawbacks, and the present invention provides a combine harvester with a dropper that slides vertically on the straw discharger and has a plurality of recesses at the tip. the sensing rod of the dropper is suspended between the tip portions of the rods of the dropper, a wide discharge portion is provided at the tip portion of the sensing rod and intersects the recessed portion in side view; It is characterized in that it is constructed so as not to protrude from the wide discharge section.

The embodiment shown in the drawings will be explained below.1
is a dropper attached (directly or via a cutter) to the rear of a threshing device 2 mounted on the base of a combine harvester, and the dropper 1 has a plurality of receiving rods 3 as shown by solid lines in Fig. 2. The horizontal shaft 4 is provided with a comb-like protrusion, or a plurality of recesses are provided at the tip of the receiving plate as shown by chain lines, and the vertical shaft 6 is provided upright on the bearing cylinder 5 of the horizontal shaft 4. is rotatably held by a receiver tube 7 fixed to the machine frame, and a spring 8 is stretched between an arm 4a protruding from the horizontal shaft 4 and an arm 5a protruding from the shaft support tube 5. pulls up the dropper 1 and biases it.

Reference numeral 9 denotes a roll pivotally supported at the tip of the control arm 10 at one end of the horizontal shaft 4, and a regulating cam consisting of a gutter-like part having an arcuate cross section and a flat plate-like stopper part connected to the upper edge of the gutter-like part. The arm 12 at the upper end of the vertical shaft 6 is operatively connected via a link 15 to a crank arm 14 which is rotated by a motor 13.

Reference numeral 16 denotes a wire whose one end is fixed to the middle part of the arm 12, the middle part is passed through the rings 17 and 18, and the other end is fixed to the arm 21 protruding from the shaft 20 of the partition body 19. The body 19 is the shaft 2 supported on the rear end of the opening/closing cover 22 of the straw drainage passage.
0, a plurality of partition rods 19a are provided protrudingly from each other.

A sensor 23 having a sensing rod 24 made of an elastic material is attached to the lower surface of the opening/closing cover 22. The sensing rod 24 protrudes rearward and then branches into two near the top of the shaft 20. The lower part of the sensing rod 24 faces the recess or between the tips of the receiving rods 3, 3 of the dropper 1, and also extends into a wide discharge portion that intersects with the dropper 1, as shown in FIG. 4 when viewed from the side. This wide discharge part is constituted by a loop 25 or a plate shown in the drawings.

In the above-mentioned device, the waste straw discharged from the culm opening of the threshing device 2 and sent later by the straw removal chain 26 slides down on the guide plate 27 and rises with the partition body 19 which is in a descending position to be concentrated. It was caught by Dropper 1, who was in a good posture.

As the amount of convergence of the waste straw increases, the sensing rod 2
The forked portion 4 is gradually pushed rearward from the position shown by the solid line in FIG. 4, and when it reaches the position shown by the chain line, the sensor 23 is turned on.

At this time, the sensing rod 24 has a single base, and a bifurcated tip that contacts the straw.
Since it is pressed by the waste straw at a certain point, even if the culm length of the waste straw changes and its center of gravity changes, the amount of convergence can be accurately sensed by a single sensing rod.

Furthermore, when two sensors are provided and a sensing rod is suspended from each, it is difficult to match the sensing timing of those sensors. By using a single base, the different sensing amounts sensed at two locations can be averaged and transmitted to the sensor 24.

When the switch of the sensor 24 is turned on, the motor 13 is started and the dropper 1 rotates rearward about the vertical axis 6 while rotating approximately 180 degrees, whereby the roll 9 is blocked by the regulation cam 11. As the dropper 1 rotates while moving, the dropper 1 rotates downward and releases the collected straw into the field.

Meanwhile, the arm 12 of the vertical shaft 6 pulls up the arm of the shaft 20 via the wire 16, so the partition 1
9 rises and rotates to catch the following straw while separating it.

Next, while the motor 13 further rotates approximately 180 degrees and stops, the dropper 1 rotates upward while rotating forward and returns to the focusing position.

At that time, if straw remains at the tip of the rod holder 3 of the dropper 1, the loop 25 at the lower end of the sensing rod 24
As shown in Fig. 5, the straw is pushed backwards and removed at the end of the rising process of the receiving rod 3, so that the sensing rod 2
4 senses the amount of waste straw to be focused next, it does so accurately without any hindrance.

Further, the partition body 19 rotates downward as the dropper 1 rotates back.

As described above, the present invention is a combine that is provided with a dropper that slides up and down in the straw discharging part and has a plurality of recesses at the tip. A wide discharge portion is provided at the tip of the sensing rod to hang between the tips of the rods, and intersects with the concave portion in side view, and the dropper is configured such that the tip thereof does not protrude from the wide discharge portion. So,
Even if there is straw remaining at the tip of the dropper, where the dropper releases the collected straw and returns to the culm support position, the wide discharge part at the tip of the sensing rod will not release the collected straw and return to the culm support position. It protrudes from the tip of the dropper and pushes it out to remove it, and in the next focusing stroke, the sensing rod responds accurately to the amount of culm in the straw without being hindered by the remaining straw, and accurately senses the amount of culm. can do.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a perspective view of the combine with a dropper attached, Figure 2 is a perspective view of the main parts, Figure 3 is an action diagram of the dropper, Figure 4 is a side view of the main parts, and Figure 5 is the action of the main parts. It is a diagram. 1... Dropper, 3... Receiving rod, 19... Sorting body, 23... Sensor, 24... Sensing rod, 25...
loop.

Claims (1)

[Scope of utility model registration request] In a combine harvester provided with a dropper that slides up and down on the straw discharge part and has a plurality of recesses at the tip, a sensor is provided on the upper part of the dropper, and a sensing rod of the dropper is suspended from the tip side of the recess of the dropper, A wide discharge part is provided at the tip of the sensing rod, and the wide discharge part is bulged in a direction substantially perpendicular to the culm direction of the collected waste straw, and when viewed from the culm direction of the waste straw. A dropper sensing device for a combine harvester, characterized in that the dropper is configured to intersect the recess in a focused state.