JPH06276830A - Lower transfer apparatus of combine harvester - Google Patents

Abstract

PURPOSE:To construct the lower transfer apparatus of a combine harvester in such a manner as to enable sure delivery of culms to an auxiliary transfer apparatus in the work at the end of reaping, in low-speed reaping or on a field having small amount of culms without causing the spill-over and the falling-off of the culms between the lower transfer chains. CONSTITUTION:A stretchable member is attached to one of the oppositely placed lower transfer chains at the joint part of the lower transfer apparatuses of a combine harvester and the gap between the lower transfer chains is made to be changeable with the stretchable member. The member is actuated by the signal transmitted from a culm quantity detection sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a lower conveying device for nipping and conveying a root of a grain culm in a combine harvester.

[0002]

2. Description of the Related Art In a conventional combine harvester, as shown in FIGS. 10 and 11, a root of a grain culm cut by a reaper is a leaf spring arranged above or below the lower transport chains 33. 32, the pinching guides 34, 34, the lower transfer chain 33, 33 while being sandwiched by the lower transfer device 31, 31
After being transported to the confluence section, it was passed on to the vertical transport device.

[0003]

However, in the prior art, the distance between the lower conveyor chains is constant so as not to be deformed even when a large amount of grain culms are conveyed, and for this reason, during mowing or low speed reaping. At the time or when cutting a small amount of grain culm, the grain culm slipped down from between the lower transport chains, causing spillage between the auxiliary transport device and the feed chains. In addition, a leaf spring or a piano wire is arranged above or below the lower transport chain in the dead space X between the lower transport chains where grain drop occurs, so that even a small amount can be clamped and transported. However, if the grain culm that is conveyed deforms immediately and becomes useless, or if the strength of the leaf spring or piano wire is too strong to prevent deformation, the grain culm will be used at the junction. There was a problem such as clogging.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the above problems will be described. That is, at the merging portion of the lower conveyor of the combine, an expandable member that can change the distance between the lower conveyor chains is provided on one of the lower conveyor chains that are arranged facing each other, and a signal from the grain culm detection sensor is provided. On the basis of the above, when the amount of grain culm is small, the expansion / contraction member is operated to reduce the distance.

[0005]

The function of the present invention will be described. At the merging portion of the lower transport device 1.1 of the combine, one of the lower transport chains 2 and 2 arranged to face each other is provided with a telescopic member that can change the distance between the lower transport chains 2 and 2 Since the expansion / contraction member is expanded / contracted based on the signal from the detection sensor, it is possible to adjust the distance between the lower transfer chains 2 and 2 in accordance with the amount of the grain culms conveyed.

[0006]

The problems to be solved and the means for solving the present invention are as described above. Next, the specific structure of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall side view of the combine, FIG. 2 is a plan view showing the transport structure of the mowing section, FIG. 3 is a side view of the same, FIG. 4 is a plan view of the confluence section of the lower transfer device of the present invention, and FIG. 5 is the present invention. 6 is a plan view showing the second embodiment, FIG. 7 is a plan view showing the third embodiment, and FIG. 8 is a bottom view when the amount of grain is small. FIG. 9 is a front sectional view showing the positions of the transport chain and the piano wire, and FIG. 9 is a front sectional view showing the positions of the lower transport chain and the piano wire when the amount of grain is large.

The overall structure of the combine will be described with reference to FIGS. A machine body frame 23 is placed on the crawler type traveling device 22, and a raising / mowing unit A is arranged at the front end of the machine body frame 23 so as to be able to move up and down. At the front end of the mowing frame 6 of the raising and mowing section A, a grass plate 7 is fixedly installed,
A raising case 9 equipped with a tine 8a for driving a raising chain 8 to drive a fall culm is erected at a rear portion of the tine 8a, and a cutting blade 10 is horizontally provided below the reaping frame 6 behind the raising case 9. There is. A plurality of sets of facing star wheels 11, 11 are arranged above the cutting blade 10, and the sprocket 12 is coaxial with one of the star wheels 11.
And a lower conveyance device 1 in which a lower conveyance chain 2 is wound around a sprocket 12 and another sprocket behind the sprocket.

Although only two lower transfer devices 1 are provided in FIG. 2, a plurality of lower transfer devices 1 are provided in the combine in accordance with the number of cutting lines. A take-up pulley 13 is pivotally supported above the rotary shaft of the sprocket 12, and a take-up belt 14 is wound around the take-up pulley 13 and is covered with a take-up cover 15. Further, substantially above each lower transfer device 1.1, an upper transfer device 16/16 in which an upper transfer chain 17 having a tine 17a is wound is provided.
Is provided. With the above configuration, the culm is a sprouting board 7.
And, it is divided into several rows by the mowing frame 6, the tip portion is raised and caused by the chain 8, transferred to the upper conveyance device 16 and nipped and conveyed, and the root portion is scraped by the scraping belt 14. It is cut by the cutting blade 10, transferred to the lower transfer device 1 and is nipped and transferred.

Further, the lower transfer device 1.1 merges at the rear part thereof, and a vertical transfer device 18 is disposed behind the lower transfer device 1.1 so that the root part of the grain culm transferred from the lower transfer device 1.1 is connected to the tip part. It is being conveyed while causing it to be horizontal. Similarly, the upper transfer devices 16 and 16 also merge at the rear part to transfer the culm horizontally to the rear auxiliary transfer device 19 together with the vertical transfer device 18. And
When the grain culm is inherited from the auxiliary conveying device 19 to the feed chain 20 of the threshing section B, the rotating handling cylinder 21 threshes. The straw that has been threshed by the handling cylinder 21 is conveyed by the feed chain 20 and discharged to the outside, and the mixed grains such as straw debris fall into the sorting unit C, and the air blower 28 blows the chaff 29. It is separated into paddy and straw debris by rocking.
25 is a straw chain, 36 is a straw cutter device, 37 is a Glen tank, 38 is a driver's cab, and 39 is a discharge auger.

Next, the structure of the lower conveyance device of the present invention will be described with reference to FIGS. As shown in FIG. 4, in the merging portion of the lower carrier device 1, 1 of the present invention, the distance between the lower carrier chains 2, 2 changes according to the traveling speed of the combine and the amount of the grain culm to be conveyed. As shown in FIG. 4, the tip of the piston 5a of the electric cylinder 5 is fixedly mounted on the bracket 3a of the driven sprocket 3 on one side of the lower transport chain 2, 2.
When is driven, the piston 5a of the electric cylinder 5 expands and contracts, and the distance between the lower transport chains 2 changes. The drive of the motor M1 is controlled according to a signal from a culm sensor 30 described later. Reference numeral 35 is a controller.

More specifically, as shown in the flow chart of FIG. 5, in STEP 1, the culm detection sensor provided in the combine raising / mowing section A detects the presence or absence of grain culm by turning it on / off. When the culm sensor detects the presence of a grain culm, the process proceeds to STEP 2, and the timer started at the same time as turning on the culm sensor is reset to detect the next grain culm. Next, in STEP 3, the amount of grain culm conveyed by the culm amount sensor 30 provided in the raising / mowing section A is read. Although this is a method of directly detecting the amount of grain, it may alternatively be detected indirectly by a vehicle speed sensor or the like. When the amount of grain culm is determined, this result is output to the controller 35, and the target value S of the motor M1 is set based on the calculation of the controller 35 as in STEP4. The motor M1 is provided with a potentiometer and the like, and the piston 5a of the electric cylinder 5 is provided.
The amount of expansion and contraction is detected, and the target value S of the motor M1 and the amount of expansion and contraction of the piston 5a are controlled to match.

If the culm detection sensor does not detect the presence of grain culm, the process proceeds from STEP 1 to STEP 5, and if the timer is not operating, the process proceeds to STEP 6 to start the timer, and if the time is up in STEP 7, , Go to STEP8, set the target value S of the motor M1 to the minimum value so that the distance between the lower transport chains 2 and 2 becomes the shortest, and if the time is not up in STEP7, wait for the next grain to arrive. Repeat timer is set. By doing so, it is possible to control the distance to the shortest only when the culm is interrupted,
The temporary lowering of the culm is erroneously detected, and the lower conveyance device 1
・ The grain culm is not clogged at the confluence of 1.

As described above, the target value S of the motor M1
Is set, but if the actual value indicating the actual digitized position of the motor M1 is smaller than the value obtained by subtracting the allowable error value a from the target value S as in STEP 9, proceed to STEP 10 to set the target. The motor M1 rotates by the difference between the value S-the allowable error value a and the actual value, and the electric cylinder 5
And shorten the piston 5a. On the contrary, the actual motor M
If the actual value indicating the position of 1 is larger than the target value S plus the allowable error value a as in STEP 11, STE
Proceeding to P12, the motor M1 reversely rotates by the difference between the target value S + the allowable error value a and the actual value, and the piston 5a of the electric cylinder 5 is extended. As described above, the motor M1
Repeat the process to match the target value S and the actual value of
The distance between the lower transport chains 2 and 2 is adapted to the amount of grain stalks to be transported, and the harvested grain stalks are transferred to the lower transport device 1.1.
It is delivered to the vertical transfer device 18 without being dropped at the merging portion.

Next, another embodiment will be described as a countermeasure against spillage between the lower conveying chains 2 and 2. As shown in FIG. 6, the lower transport chain facing the central portion 24a of the connecting rod 24 connecting the bracket 3a of the driven sprocket 3 and the bracket 4a of the tension sprocket 4 on one side of the lower transport chain 2 Two
When the compression springs 24b biased to the side are arranged and there are many grain culms to be conveyed, the grain culm moves rearward while spreading the lower conveyance chains 2 and 2 to move the lower conveyance device 1.1. If there are few grain culms that have been transported to the confluence of
It is also possible to move backward between the lower transfer chains 2 and reach the confluence of the lower transfer devices 1.1. And the compression spring 24b
The pressing force of is set smaller than the pressing force of the grain culm,
In addition, driven sprocket 3 and tension sprocket 4
Since they move integrally, troubles such as transport stagnation due to changes in the peripheral length of the lower transport chain 2 do not occur.

In addition to the measures against the spillage, as shown in FIGS. 7 to 9, the rear ends 26a, 26a of the pinching guides 26, 26 are shown.
Both ends 27a ・ 27a of the V-shaped piano wire 27
Suspend each and hold the piano wire 27 and the pinching guide 26.
The inside surrounded by 26 can be configured so that grain culms cannot enter. And when there are few grain culms to be conveyed, as shown in FIG.
And, the grain culm passes between the piano wire 27 and the lower transport chain 2.2, and is transported to the confluence of the lower transport device 1.1. 9
While pushing the pinching guides 26 and 26 and the piano wire 27 inward, the grain culm passes and the lower transfer device 1.1
Is transported to the confluence section.

[0016]

Since the present invention is configured as described above, it has the following effects. That is, the culm sensor provided inside the mowing unit immediately grasps the vehicle speed and the grain culm and sets the target value of the motor, drives the motor according to the target value of the motor, and expands and contracts the piston of the electric cylinder. Since the distance between the lower conveyor chains is adjusted to accommodate the grain culm that is being conveyed, spillage of culms at the confluence of lower conveyors, drop of culms, jamming of culms, etc. are eliminated, and auxiliary conveyors and feed chains are eliminated. You will be able to reliably deliver the grain culm to you.

[Brief description of drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a plan view showing a transport structure of a reaping unit.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of a merging portion of the lower conveyance device of the present invention.

FIG. 5 is a flowchart of a distance adjustment control between lower transport chains according to the present invention.

FIG. 6 is a plan view showing a second embodiment.

FIG. 7 is a plan view showing a third embodiment.

FIG. 8 is a front sectional view showing the positions of the lower transport chain and the piano wire when the amount of grain culm is small.

FIG. 9 is a front cross-sectional view showing the positions of the lower transport chain and the piano wire when the amount of grain culms is also large.

FIG. 10 is a plan view of a merging portion of a lower conveyance device according to the related art.

FIG. 11 is a front sectional view of the same.

[Explanation of symbols]

 M1 motor 1 lower transfer device 2 lower transfer chain 3 driven sprocket 5 electric cylinder 5a piston 30 culm sensor

Claims (1)

[Claims] 1. A combine sensor of a lower conveyor device of a combine is provided with a telescopic member capable of changing a distance between the lower conveyor chains on one of the lower conveyor chains arranged facing each other, and a sensor for detecting a grain amount. Based on a signal from the above, when the amount of grain culm is small, the lower conveyer device of the combine is characterized in that the expandable member is operated to reduce the distance.