JP2009225763A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester capable of uniformly returning straw onto the farm field in the well-drained paddy field work, while avoiding carrying about of the straw by crawlers in the wet paddy field work. <P>SOLUTION: The combine harvester 1 has a pretreating part 2 for reaping stem culm, a threshing part 3 for threshing grain from the reaped stem culm and a cutter 6 for cutting the threshed straw, on a machine body travelling on the farm field by a pair of right and left crawlers 7a, and falls down the straw cut with the cutter 6 from the rear part of the machine body, wherein the combine harvester can switch a condition dispersing and falling down the straw cut with the cutter 6 and a condition intensively falling down on the wheel tracks of the crawlers 7a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a combine equipped with a cutter for cutting threshed cocoons.

Combine harvesters that cut and thresh stem stalks are widely used. For example, the combine shown in Patent Document 1 is a machine that runs on a field by a pair of left and right crawlers, a pre-processing unit that cuts stems, a threshing unit that threshs grains from the cut stems, and a threshed rice cake And the cutter cut by the cutter falls from the rear part of the machine body and is returned to the field.
JP 2004-313068 A

  When mowing in a wet field, it is preferable to avoid carrying around the crawler by a crawler as much as possible. The reason for this is that when the soot carried around by the crawler is mixed with mud, it becomes a so-called mud wall state in which the solid strength and adhesion strength are increased, and adhesion and accumulation on the crawler running portion are promoted. And since mud mixed with firewood is difficult to fall off, it not only increases the burden of car washing after mowing work, but also drops when traveling on the road after mowing work, and there is a risk of contaminating the road.

  Therefore, the operator tries not to step on the paddle as much as possible when working on the wet field, but there is a problem that stepping on the paddle is unavoidable when going backward. In general, when going back in wetland work, it is recommended to go back avoiding crawler traps. The reason is that when the crawler runs on the kite again, the kite gets deeper and affects the next year's scoring work.

The present invention has been created in order to solve these problems in view of the above circumstances, and includes a pre-processing unit that cuts stems and a cutting unit on a machine body that runs on a field by a pair of left and right crawlers. In a combine that includes a threshing section for threshing grain from a stalk stalk and a cutter for cutting the threshed cocoon, and dropping the cocoon cut by the cutter onto the field from the rear part of the machine body, It is possible to switch between a state where it is diffused and dropped and a state where it is dropped intensively on the crawler's cage. If it does in this way, in the dry rice field work where the rotation of the straw by the crawler does not become a problem, the straw can be evenly returned to the field by diffusing and dropping the cut straw on the field. On the other hand, in wetland work where it is desired to avoid the crawling of the crawler by the crawler, the crawler can avoid the crawling of the crawler by intensively dropping the cut reed on the crawler's reed. In other words, in wet field work, it is common to avoid running the kite so that the kite does not become deeper. Therefore, if the cut kite is dropped intensively onto the crawler kite, even when traveling backwards It is possible to avoid the crawling around the crawler.
Further, the switching is performed according to an operation of an operation tool provided in the vicinity of the driver's seat. If it does in this way, the operator can switch the fall state of a straw without getting down to a wet field.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a combine, and the combine 1 includes a pre-processing unit 2 for harvesting stems, a threshing unit 3 for threshing and selecting grains from the harvested stems, and a sorted kernel. The machine body includes a grain tank 4 to be stored, a waste transporting body 5 for transporting threshed waste to the rear part of the machine, a cutter 6 provided below the terminal end of the waste transporting body 5, and a pair of left and right crawlers 7a. The crawler traveling unit 7 for traveling the vehicle and the operation unit 8 provided with a driver's seat (not shown) and various operation tools are configured.

  As shown in FIGS. 1 to 3, the cutter 6 includes a cutter case 9 having a discharge introduction port 9 a at an upper portion thereof, a scraping shaft 10 installed in the cutter case 9 facing in the left-right direction, and the scraper A number of scraping discs 10a arranged in parallel to the shaft 10 with a predetermined interval, a cutter shaft 11 parallel to the scraping shaft 10, and a parallel arrangement to the cutter shaft 11 with a predetermined interval. A number of cutter teeth 11a are provided, and the scraper introduced from the reject introduction port 9a is cut by rotating the scraping shaft 10 and the cutter shaft 11 in a reverse direction with a predetermined peripheral speed difference. It has become.

  On the upper part of the cutter case 9, a switching plate 13 for opening and closing the waste introduction port 9a is provided. The switching plate 13 is supported by a rear end edge portion of the evacuation introduction port 9a through a support shaft 13a so as to be vertically rotatable, and a cutter processing posture that allows the evacuation introduction by opening the evacuation introduction port 9a. Then, it is transformed into a non-cutter processing posture that closes the waste introduction port 9a and restricts the introduction of waste. Further, the switching plate 13 in the cutter processing posture is held at a predetermined opening angle and guides the introduction of waste on the lower surface thereof, while the switching plate 13 in the non-cutter processing posture guides waste on the rear side of the cutter by its upper surface inclination. It also functions as a guide member that guides to a position (a mounting position of a knotter or the like). In addition, a waste rail 14 that is slid back and forth in conjunction with the rotation of the switching plate 13 is provided at the transport end portion of the waste transport body 5, and when the switching plate 13 is in the cutter processing posture, While the waste rail 14 is slid to the front position to reduce the transport end position of the waste transport body 5 forward, when the switching plate 13 is in the non-cutter processing position, the transport end position of the waste transport body 5 is set. In order to extend backward, the waste rail 14 is slid to the rear position.

  Below the cutter case 9 is provided a cutter cover 15 that guides the dropping of the cut bag. The cutter cover 15 is provided between the rear cover 16 extending downward from the rear end of the cutter case 9, a pair of left and right side covers 17 extending downward from the left and right ends of the cutter case 9, and the left and right side covers 17. The opening / closing cover 18 is included. As shown in FIGS. 3 and 5, the open / close cover 18 includes a support shaft 19 that protrudes forward from the left and right center position of the rear cover 16, and a pair of plate members 20 that rotate left and right about the support shaft 19. A bendable connecting link 21 that connects the pair of plate members 20, and a return spring that is interposed between the pivot 22 and the support shaft 19 of the connecting link 21 and biases the pair of plate members 20 in the closing direction. 23.

  That is, the opening / closing cover 18 pulls the pivot 22 of the connecting link 21 downward against the urging force of the return spring 23 when the pair of plate members 20 are superposed in a vertical posture by the urging force of the return spring 23. Thus, the pair of plate members 20 can be switched to an open state in which the pair of plate members 20 are inclined in a C shape. When the open / close cover 18 is in the closed state, the ridges cut by the cutter 6 can be diffused and dropped into the field, while when the open / close cover 18 is in the open state, the inclined guide of the plate member 20 is provided. By the action, the wrinkles cut by the cutter 6 can be intensively dropped onto the wrinkles of the crawler 7a.

  If it does in this way, in the dry rice field work in which the rotation of the straw by the crawler 7a does not become a problem, the straw can be uniformly returned to the field by diffusing and dropping the cut straw. On the other hand, in wet field work where it is desired to avoid the crawling of the crawler 7a, the crawler 7a can avoid the crawling of the crawler 7a by intensively dropping the cut gutter onto the crawler 7a. That is, in wet field work, it is common to avoid the heel so that the heel does not become deeper. Therefore, if the cut heel is intensively dropped onto the heel of the crawler 7a, it will be in reverse. In addition, the crawler 7a can be prevented from being carried around.

  The switching of the open / close state of the open / close cover 18 is preferably performed according to an operation of an operation tool provided in the vicinity of the driver's seat. For example, in order to switch the postures of the switching plate 13 and the waste rail 14 described above, the switching state of the opening / closing cover 18 is switched using the existing switching operation lever 24 provided in the vicinity of the driver's seat. If it does in this way, it will become possible for the operator to switch the fall state of a paddle, without getting down to a wet field.

  Next, the switching operation of the switching plate 13, the waste rail 14 and the opening / closing cover 18 according to the operation of the switching operation lever 24 will be described. As shown in FIGS. 3 and 4, the switching operation lever 24 can be rotated in the front-rear direction about the lever support shaft 24a, and the lever guide 25 has three operation positions (exhaust position, wetland cutter). Position, cutter position). Three operation wires 26 to 28 are connected to the switching operation lever 24, and the switching operation of the switching plate 13, the waste rail 14, and the opening / closing cover 18 can be performed via these operation wires 26 to 28. .

  3 and 4 show a state in which the switching operation lever 24 is operated to the wetland cutter position, the switching plate 13 is in the open state, the waste rail 14 is in the contracted state, and the opening / closing cover 18 is in the open state. . Here, when the switching operation lever 24 is operated from the wet paddle cutter position to the cutter position, the operation wire 28 connected to the opening / closing cover 18 is drawn out, and the opening / closing cover 18 is closed by the urging force of the return spring 23. Further, when the switching operation lever 24 is operated from the wet paddle cutter position to the rejection position, the operation wire 28 connected to the open / close cover 18 is pulled, and the open / close cover 18 is maintained in the open state. That is, in the evacuation position, the evacuation is discharged without being cut, so there is no problem even if the opening / closing cover 18 is opened.

  As for the switching plate 13 and the waste rail 14, when the switching operation lever 24 is operated from the wet paddle cutter position to the waste position, the switching plate 13 is switched from the open state to the closed state, and the waste rail 14 is moved from the contracted state. Switch to the extended state. Conversely, when the switching operation lever 24 is operated from the rejection position to the wet paddy cutter position, the switching plate 13 is switched from the closed state to the open state, and the rejection rail 14 is switched from the extended state to the contracted state. In addition, when the switching operation lever 24 is operated from the wet paddle cutter position to the cutter position (or from the cutter position to the wet paddy cutter position), the state of the switching plate 13 and the waste rail 14 is not changed.

  According to the present embodiment configured as described, in the machine body that runs on the field by a pair of left and right crawlers 7a, the pre-processing unit 2 that cuts the stems and the threshing unit 3 that threshs the grains from the cut stems. A combine 6 that cuts the cocoon cut by the cutter 6 from the rear part of the machine body to the field, and the state that the cutter 6 cuts and diffuses to the field; Since it is possible to switch to a state where the crawler 7a is intensively dropped on the straw, in dry field work where the crawling around the crawler 7a is not a problem, the cut straw is diffused and dropped on the field to drop the straw. The field can be reduced evenly. On the other hand, in wet field work where it is desired to avoid the crawling of the crawler 7a, the crawler 7a can avoid the crawling of the crawler 7a by intensively dropping the cut gutter onto the crawler 7a. That is, in wet field work, it is common to avoid the heel so that the heel does not become deeper. Therefore, if the cut heel is intensively dropped onto the heel of the crawler 7a, it will be in reverse. In addition, the crawler 7a can be prevented from being carried around.

  Further, since the switching is performed according to the operation of the switching operation lever 24 provided in the vicinity of the driver's seat, the operator can switch the falling state of the soot without getting down to the wet field.

It is a side view of a combine. It is a rear view of the combine which shows the inside of a cutter. It is the perspective view which looked at the inside of a cutter from the front side. It is a perspective view of a switching operation lever. It is a front view of an opening / closing cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 2 Pretreatment part 3 Threshing part 6 Cutter 7a Crawler 7 Crawler traveling part 8 Operation part 9a Exhaust introduction port 13 Switching plate 14 Exhaust rail 18 Opening / closing cover 24 Switching operation lever

Claims (2)

The machine that runs on the field with a pair of left and right crawlers is equipped with a pre-processing unit that harvests stalks, a threshing unit that threshs grains from the harvested stalks, and a cutter that cuts threshed culms, and the cutter cuts In the combine to drop the firewood that has been done to the field from the rear of the aircraft,
A combine that can be switched between a state in which the cocoon cut by the cutter is diffused and dropped onto the field and a state in which the cocoon is dropped intensively on the crawler's cocoon.   The combine according to claim 1, wherein the switching is performed in accordance with an operation of an operation tool provided in the vicinity of a driver's seat.

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