JP2014176395A5 - - Google Patents

Description

Combine harvesting and conveying structure

  The present invention connects a cutting and conveying unit to one of the left and right sides of the traveling vehicle body, forms a riding operation unit on the other side of the traveling vehicle body, and deploys a threshing device at a position behind the cutting and conveying unit in the traveling vehicle body. And a pair of left and right pulling frames are formed by arranging three weeding members and a pair of right and left pulling devices in the cutting and conveying section so that the pulling device is positioned between two adjacent weeding members. A squeeze transport device that squeezes and transports the crop culm harvested by the reaping device of the reaping transport unit to each of the left and right pulling frames to the cereal passing part formed between the left and right pulling frames. It is related with the harvesting conveyance structure of the combine provided with the supply conveyance device which equips and the said harvesting conveyance part conveys the grain straw of the crop conveyed to the above-mentioned threshing passage part to the above-mentioned threshing device by the above-mentioned left and right scraping conveyance device.

  In a small combine that adopts the two-frame specification mowing and conveying structure as described above, the working width of the mowing and conveying unit is larger than the distance between the left and right crawlers that is set widely in order to secure a predetermined fall angle. Narrow. For this reason, it is difficult to perform the split operation in which uncut crops exist on the left and right outer sides of the vehicle body.

  Therefore, in the harvesting and transporting structure of the small combine, the pulling frame on the side away from the boarding operation part is configured for one line, and the pulling frame on the boarding operation part side can cause a maximum of two crop culms. By constructing for two lines, the cutting and conveying part is configured to have a two-frame and three-line cutting specification with a wide working width, and this cutting and conveying part is positioned substantially at the center of the left and right sides of the vehicle body (within the left and right widths of the vehicle body (crawlers). The middle split work position for harvesting the three crops in the furrow) and the two crops present on the side farther from the boarding operation section by shifting to the side farther from the boarding operation section than the middle work position There is one that can perform both the middle split and the swivel work well by being equipped so as to be slidable laterally with respect to the traveling vehicle body over the swivel cutting work position (see, for example, Patent Document 1). ).

JP 10-155339 A

  According to said structure, the complicated structure for enabling horizontal cutting of the cutting conveyance part with respect to a traveling vehicle body is needed. Therefore, the cutting and conveying structure becomes large and complicated, and the cost required for the cutting and conveying structure increases.

  An object of the present invention is to make it possible to satisfactorily perform both the middle-cutting and the turning-cutting work without complicating the cutting and conveying structure and increasing the cost.

The feature of the present invention is that
A cutting and conveying section connected to one of the left and right sides of the traveling vehicle body ;
A boarding operation part provided on the other side of the traveling vehicle body ;
A threshing device provided at a position behind the cutting and conveying unit in the traveling vehicle body ,
A scraping and transporting device that scrapes and transports the cereals harvested by the reaping device of the scouring and transporting unit to the scouring and transporting unit, and a supply and transporting device that transports the stalks transported by the scavenging and transporting device to the threshing device And
The feeding and conveying device includes a conveying terminal portion of the feeding and conveying device so that the handling depth can be adjusted to change the feeding length to the threshing device on the tip side of the cereal that is threshed by the threshing device. It is configured to be able to swing up and down as a fulcrum,
The cutting and conveying unit is provided with a guide rod that swings and guides the conveyance start end portion of the supply and conveyance device in the vertical direction while suppressing the lateral movement of the supply and conveyance device.
A recess for allowing the transfer start end and the guide rod to enter is formed at a front end of the boarding operation portion on the supply transfer device side, and the transfer start end and the guide rod in the vehicle body front view. Is configured to overlap with the boarding operation unit.

In the present invention,
A bracket having a through hole is attached to the conveyance start end,
The guide rod is preferably inserted into the through-hole so as to swing and guide the conveyance start end portion in the vertical direction while suppressing the lateral movement of the supply and conveyance device.

In the present invention,
It is preferable that the bracket is attached to the transport start end portion in a state of extending toward the front.

In the present invention,
It is preferable that the bracket is attached to the conveyance start end portion so that the through hole is located closer to the boarding operation portion than the conveyance start end portion.

In the present invention,
A stock holding and transporting mechanism for holding and transporting the stock source side of the grain straw to the supply transporting device, and a tip associated with and transporting the stock tip holding side of the grain straw, which is provided above the stock holding and transporting mechanism. A stop conveyance mechanism,
It is preferable that the bracket is attached to the tip locking and conveying mechanism.

Combine left side view Combine right side view Overall plan view of combine Overall front view of combine Schematic showing the transmission configuration of the combine Left side view of the cutting and conveying section Right side view of the cutting and conveying section Cross-sectional plan view of the main parts of the cutting and conveying section Longitudinal front view of the main parts of the cutting and conveying section Longitudinal rear view of the main parts of the cutting and conveying section Longitudinal right side view of the main parts of the cutting and conveying section Longitudinal front view of the main part showing the configuration of the pulling device Cross-sectional plan view of the main part showing the configuration of the take-up transport device Cross-sectional plan view of the main part showing the configuration of the take-up transport device and the supply transport device 4 is a schematic plan view of the main part showing the working state of four-cutting Schematic plan view of the main part showing the working state of 3-cutting The perspective view of the principal part which shows the attachment structure of the weed terminal part side of the left weed fence A plan view of the main part showing the state where the left weed fence is switched to the retracted position Left side view of the cutting and conveying unit showing another form of the cutting and conveying unit Front view of the cutting and conveying unit showing another form of the cutting and conveying unit

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1 is an overall left side view of the combine, FIG. 2 is an overall right side view of the combine, FIG. 3 is an overall plan view of the combine, and FIG. 4 is an overall front view of the combine. As shown in these drawings, the combine illustrated in this embodiment has a boarding operation unit 2 formed on the right side of the front portion of the traveling vehicle body 1. On the left side of the front part of the traveling vehicle body 1, a cutting and conveying unit 3 that harvests and conveys crop cereals of crops C such as paddy rice and wheat during operation traveling is connected to be swingable up and down. The left half of the traveling vehicle body 1 receives the harvested culm that is transported by the harvesting and transporting unit 3, threshing the harvested culm, and subjecting the processed product obtained by the threshing process to sorting. A threshing device 4 is mounted. The rear portion of the threshing device 4 is connected to a waste straw processing device 5 that discharges the waste straw that is the cereal straw after the threshing processing to the outside of the vehicle. On the right side of the rear part of the traveling vehicle body 1 is mounted a bagging device 7 for storing single-grained grains from the threshing device 4 conveyed by the lifting screw 6 and for bagging the stored single-sized grains. It is.

  FIG. 5 is a schematic view showing the transmission configuration of the combine. As shown in FIGS. 1 to 5, the traveling vehicle body 1 is integrally equipped with a belt-type transmission device 10 and a transmission case (hereinafter abbreviated as T / M case) 11 with power from an engine 9 mounted on a vehicle body frame 8. The hydrostatic continuously variable transmission (hereinafter abbreviated as HST) 12 and a traveling transmission system (not shown) provided inside the T / M case 11 are provided at the lower portion of the vehicle body frame 8. It is configured to transmit to a pair of left and right crawlers 13A, 13B provided.

  Although illustration or reference numerals are omitted, the vehicle body frame 8 is connected to a base frame frame formed by a plurality of side members and cross members made of square pipes, and a large number of reinforcing members and support members made of various steel materials. Configured. The engine 9 is water-cooled, and is disposed with a radiator on the right side portion of the front portion of the body frame 8. The T / M case 11 has a left and right divided structure, and is disposed at the right and left center side portion of the front portion of the vehicle body frame 8 so as to be located on the right side of the vehicle body. Inside the T / M case 11, a pair of left and right side brakes for braking the corresponding crawlers 13A and 13B are provided. The HST 12 is located above the left case in the T / M case 11 and transmits the power after the shift to the traveling transmission system for traveling. The traveling transmission system includes a pair of left and right side clutches that intermittently transmit power to the corresponding crawlers 13A and 13B. The left and right crawlers 13A and 13B are operated by the power transmitted through the corresponding side clutch, and are braked by the operation of the corresponding side brake. The left and right side clutches and side brakes are hydraulically operated.

  Incidentally, in the traveling vehicle body 1, a gear-type transmission device is provided inside the T / M case 11 instead of the HST 12, and the power from the engine 9 is transmitted to the belt-type transmission device 10, the gear-type transmission device, and the side clutch, It may be configured to transmit to the left and right crawlers 13A and 13B via the above. Further, a sub-transmission device that shifts the power after shifting by the HST 12 may be provided in the traveling transmission system.

  As shown in FIGS. 1 to 4, the boarding operation unit 2 is provided with a front panel 14, a side panel 15, an engine cover 16, and the like on the right side of the front part of the vehicle body frame 8, and can get on and off from the vehicle body right side. It is formed so that Further, the right end portion is set so as to be located on the right outer side of the vehicle body with respect to the right end portion (end portion on the laterally outer side of the vehicle body) 13Ba of the right crawler 13B. The front panel 14 is equipped with a cross swing type neutral return type control lever 17 and the like. The side panel 15 is equipped with a swinging type and position maintaining type transmission lever 18 and the like. The engine cover 16 is equipped with a driver seat 19.

  6 is a left side view of the cutting and conveying unit 3, FIG. 7 is a right side view of the cutting and conveying unit 3, and FIG. 8 is a transverse plan view of the main part of the cutting and conveying unit 3. As shown in FIGS. 1-8, the cutting conveyance part 3 is attached to the cutting frame 20 connected with the front left side of the vehicle body frame 8 so that raising / lowering swinging is possible, three weeding members 21A-21C, and a pair of left and right pulling devices 22A. , 22B, a clipper type mowing device 23, a pair of left and right scraping and conveying devices 24A and 24B, a supply conveying device 25, and the like. And three weeding members 21A-21C are arrange | positioned at predetermined intervals in the left-right direction, and between two adjacent ones of these weeding members 21A-21C, right and left corresponding raising apparatus 22A, By arranging 22B, a pair of left and right pulling frames 26A and 26B are formed in the front part of the cutting and conveying unit 3.

  The three weeding members 21 </ b> A to 21 </ b> C are located at the left weeding member 21 </ b> A located at the left end of the cutting and conveying unit 3, the right weeding member 21 </ b> B located at the right end of the cutting and conveying unit 3, and between them. It is the middle weed member 21C, and cereals of the crop C to be harvested during work traveling are divided into the trigger frames 26A and 26B. The left and right pulling devices 22 </ b> A and 22 </ b> B cause a crop culm introduced between the corresponding weeding members 21 </ b> A to 21 </ b> C. The reaping device 23 reaps the crop culm caused by the left and right pulling devices 22A and 22B. The left and right scraping and conveying devices 24 </ b> A and 24 </ b> B scrape and convey the harvested culm toward the culm passing unit 27 provided at the left and right center of the chopping and transporting unit 3, and pass the culm passing unit 27. The supply transport device 25 receives the cereals that have passed through the cereal passer 27 from the left and right scraping transport devices 24A and 24B, and changes the posture of the received culms from the standing posture at the time of receipt to the right-falling posture for threshing. While being fed toward the threshing device 4.

  As shown in FIG. 5, the power from the engine 9 is transmitted to the cutting and conveying unit 3 through the belt type transmission device 10, the input shaft 28 of the HST 12, the belt tension type cutting clutch 29, and the like.

  Incidentally, although illustration is omitted, the power after shifting by the HST 12 may be transmitted to the cutting and conveying unit 3. Also, a transmission dedicated for harvesting conveyance is provided, and power from the engine 9 is harvested and conveyed via the belt-type transmission 10, the input shaft 28 of the HST 12, the transmission dedicated for harvesting conveyance, the harvesting clutch 29, and the like. You may comprise so that it may transmit to the part 3. FIG. Note that a gear-type transmission, HST, or the like can be adopted as a transmission dedicated for cutting and conveying.

  As shown in FIG. 1, the cutting and conveying unit 3 swings up and down by the operation of a lifting cylinder 30 that extends between the vehicle body frame 8 and the cutting frame 20. A single-acting hydraulic cylinder is adopted as the lifting cylinder 30.

  Although illustration is omitted, the control lever 17 is linked to the lifting cylinder 30 via a hydraulic control system for lifting and lowering so that the operation of the lifting cylinder 30 is controlled based on the swinging operation in the front-rear direction. is there. Accordingly, by operating the control lever 17 to swing back and forth, the cutting and conveying unit 3 can be swung up and down over the lower limit side work area and the upper limit side non-work position. In the work area, the cutting height adjustment for adjusting the height position of the cutting device 23 with respect to the crop C to be harvested can be performed by the up-and-down swing of the cutting conveyance unit 3.

  Further, the control lever 17 is controlled via a steering hydraulic control system so that the operation of the left and right side clutches and the side brakes according to the operation direction is controlled based on the swing operation in the left and right direction. It is linked to the left and right side clutches and side brakes. The shift lever 18 is linked to the shift operation shaft of the HST 12 via a linkage mechanism so that the HST 12 operates based on the swing operation. Thus, by swinging the speed change lever 18, the left and right crawlers 13A and 13B can be switched steplessly between a stopped state, a forward drive state, and a reverse drive state. In each of the forward drive state and the reverse drive state, the drive speeds of the left and right crawlers 13A and 13B can be changed steplessly. In the forward drive state or the reverse drive state, the steering lever 17 is swung in the left-right direction to change the traveling state between the straight-ahead state in which the left and right crawlers 13A and 13B are driven at a constant speed and the clutch operation. It is possible to switch between a slow turning state in which 13A and 13B are differentiated and a sudden turning state in which one of the left and right (turning inside) crawlers 13A and 13B is braked.

  As shown in FIGS. 1 to 4, the threshing device 4 is such that the nipping and conveying mechanism 31 provided on the left side thereof is on the left outer side of the left side of the crawler 13 </ b> A (end on the lateral side of the vehicle side) 13 </ b> Aa. It is set to be located on the side. In addition, the pinching and transporting mechanism 31 receives the stock side of the culm that has been transported in the right-tilt posture from the scouring and transporting unit 3, and the sap is fed so that the tip side of the cereal is supplied to the inside of the threshing device 4. The culm from the transport unit 3 is nipped and transported toward the rear waste straw processing apparatus 5. And although illustration is abbreviate | omitted, with the handling cylinder with which the inside of the threshing apparatus 4 was provided, the threshing process was given to the tip side of the corn straw supplied to the inside, the sieving type | formula provided with the inside of the threshing apparatus 4, a wind type, etc. The sorting process is applied to the processed product obtained by the threshing process. The single grain obtained by this sorting process is collected in the No. 1 recovery part and conveyed toward the lifting screw 6 by the No. 1 screw. Unseparated grains etc. are collected in the No. 2 recovery unit, transported to the No. 2 reduction device by the No. 2 screw, re-threshed in the No. 2 reduction device, and then subjected to the re-sorting process by the sorting mechanism. As described above, the sheet is conveyed toward the sorting mechanism by the second reduction device. Dust such as cut straw and straw waste is discharged out of the vehicle through a dust outlet formed at the rear end of the threshing device 4. The threshing device 4 includes a holding conveyance mechanism 31, a handling cylinder, a selection mechanism, a first screw, a second screw, a second reduction device, and the like, which are transmitted together with the lifting screw 6 through a threshing clutch or the like. Operates with power from.

  As shown in FIG. 1, the waste straw processing apparatus 5 receives the waste straw transported from the threshing device 4 by the pinch transport mechanism 31 and transports it backwards by the waste straw transport mechanism 32 provided on the upper part thereof. Although not shown in the figure, the long straw discharge state in which the waste straw is released outside the vehicle with a long length, and the shredder that shreds the waste straw with the disc cutter provided inside, and the fine waste that is discharged outside the vehicle. It is configured such that the discharge state of the waste straw discharger can be switched to the disconnected state. The waste straw transporting mechanism 32 and the disc cutter are operated by power from the engine 9.

  9 is a longitudinal front view of the main part of the cutting and conveying unit 3, FIG. 10 is a vertical rear view of the main part of the cutting and conveying unit 3, and FIG. 11 is a vertical right side view of the main part of the cutting and conveying unit 3. As shown in FIGS. 1 to 11, the cutting frame 20 includes a left and right connecting member 33 connected to the traveling vehicle body 1 at the rear end thereof. The connecting member 33 is made of a round pipe material or the like so as to be a rocking fulcrum when the cutting and conveying unit 3 is rocked up and down. An extension member 34 that extends toward the front lower side of the traveling vehicle body 1 along the longitudinal direction of the vehicle body is connected to the connection member 33. An intermediate member 35 located at the bottom of the cutting and conveying unit 3 is connected to the extending end of the extending member 34 in the left-right direction. The intermediate member 35 is formed at a position on the left side of the left and right intermediate portion so that a connecting portion 35A for the extending member 34 extends from the back surface to the rear of the vehicle body along the front-rear direction of the vehicle body. . The left weed member 21A is connected to the left end portion of the intermediate member 35 so that the front portion of the left weed member 21A extends toward the front of the vehicle body along the longitudinal direction of the vehicle body. Further, a support member 36 that supports the left pulling device 22A is provided upright. The right weed member 21B is connected to the right end portion of the intermediate member 35 so as to extend toward the front of the vehicle body along the longitudinal direction of the vehicle body. The intermediate weed member 21C is connected to the left and right intermediate portions of the intermediate member 35 so as to extend toward the front of the vehicle body along the longitudinal direction of the vehicle body.

  Inside the connecting member 33, an input shaft 38 that rotates integrally with the output pulley 37 of the reaping clutch 29 is provided. Inside the extending member 34, a transmission shaft 40 that interlocks with the input shaft 38 via a pair of bevel gears 39 is provided. Inside the intermediate member 35, a front-rear-facing relay shaft 42 that interlocks with the transmission shaft 40 via a pair of bevel gears 41, a power distribution shaft 44 that interlocks with the relay shaft 42 via a pair of bevel gears 43, and the like. is there. Inside the support member 36, a left transmission shaft 46 that is linked to the power distribution shaft 44 via a pair of bevel gears 45 is provided. A right transmission shaft 48 that interlocks with the power distribution shaft 44 via a pair of bevel gears 47 is erected at the right end portion of the intermediate member 35 toward the right pulling device 22B.

  As shown in FIGS. 6 to 10, the left weed member 21 </ b> A is made of sheet metal via a left weed support rod 50 </ b> A at the front end of an L-shaped left weed pipe 49 </ b> A connected to the left end of the intermediate member 35. By connecting the left weeding tool 51A, the cutting and conveying unit 3 is positioned at the left end. The right weeding member 21B is cut by connecting the right weeding tool 51B made of sheet metal to the front end of the right weeding pipe 49B connected to the right end of the intermediate member 35 via the right weeding support rod 50B. It is configured to be positioned at the right end of the transport unit 3. The middle weed member 21C is connected to the front end portion of the middle weed pipe 49C connected to the left and right middle portions of the intermediate member 35 by connecting the middle weed tool 51C made of sheet metal via the middle weed support rod 50C. It is configured so as to be located at a substantially left and right intermediate position of the cutting and conveying unit 3 (so that the middle weed tool 51C is located at a substantially right and left intermediate position between the left weed tool 51A and the right weed tool 51B). . Each weeding member 21A to 21C has a predetermined interval in the left-right direction so that up to two crops C can be introduced between two adjacent weeding members 21A, 21C or 21B, 21C. Opened up. Further, when the cutting and conveying unit 3 is positioned in the work area, the posture thereof is set to be a horizontal posture or a substantially horizontal posture.

  FIG. 12 is a longitudinal sectional front view of the main part showing the configuration of the pulling devices 22A and 22B. As shown in FIGS. 1 to 12, the left and right pulling devices 22A and 22B are configured in a symmetrical shape. More specifically, the left and right pulling devices 22A and 22B include input shafts 53A and 53B above the pulling cases 52A and 52B. In each of the pulling cases 52A and 52B, there are driving sprockets 54A and 54B rotating integrally with the input shafts 53A and 53B, tension sprockets 55A and 55B adjacent to the lateral sides of the driving sprockets 54A and 54B, and the pulling cases 52A and 52B. The first guide rollers 56A and 56B and the second guide rollers 57A and 57B disposed at the lower portion, and endless chains 58A and 58B that are swung over them are provided. Each endless chain 58A, 58B is provided with a plurality of raising claws 59A, 59B arranged at a constant pitch. The pulling claws 59A and 59B have a retracted posture in which their free ends are located inside the pulling cases 52A and 52B, and an action posture that extends outward from the pulling cases 52A and 52B and acts on the crop C. Are pivoted about the connecting pins 60A and 60B that connect the endless chains 58A and 58B to the endless chains 58A and 58B. Between the first guide rollers 56A and 56B and the second guide rollers 57A and 57B, first guide rails 61A and 61B for holding the pulling claws 59A and 59B in a downward acting posture are provided. Between the second guide rollers 57A and 57B and the drive sprockets 54A and 54B, second guide rails 62A and 62B for holding the raising claws 59A and 59B in a laterally acting posture are provided.

The left pulling device 22 </ b> A has its input shaft 53 </ b> A interlocked with the left transmission shaft 46 via a pair of bevel gears 63. By this interlocking, the endless chain 58A rotates clockwise in a front view. By this rotation, each pulling claw 59A moves from the left end side to the left and right center side of the cutting and conveying unit 3 in the guide region Aa1 held in the downward acting posture by the first guide rail 61A. Then, the culm of up to two crops C introduced between the left weed member 21 </ b> A and the middle weed member 21 </ b> C is raked and guided toward the left and right center side of the cutting and conveying unit 3. Moreover, in the raising area Aa2 held in the laterally acting posture by the second guide rail 62A, it moves from the lower end of the pulling case 52A toward the upper part, and this movement allows the grain C of the crop C after the rake guidance to be moved. cause.

The right pulling device 22 </ b> B has its input shaft 53 </ b> B interlocked with the right transmission shaft 48 via a chain transmission mechanism 64 and a pair of bevel gears 65. By this interlocking, the endless chain 58B rotates counterclockwise when viewed from the front. By this rotation, each pulling claw 59B moves from the right end side to the left and right center side of the cutting and conveying unit 3 in the guide region Ab1 held in the downward acting posture by the first guide rail 61B. Then, the culm of up to two crops C introduced between the right weed member 21 </ b> B and the middle weed member 21 </ b> C is raked and guided toward the left and right center side of the cutting and conveying unit 3. Further, the lead region Ab2 is held sideways action position by the second guide rail 62B, to move from the lower end of the ink case 52B toward the upper, by this movement, the culms crop C after guiding scraping cause.

  In other words, the left and right pulling devices 22A and 22B are provided with the cereal of the crop C introduced between the corresponding ones of the three weeding members 21A to 21C by the plurality of pulling claws 59A and 59B provided for them. Guide areas Aa1 and Ab1 for scrambling and guiding toward the left and right central side of the cutting and conveying unit 3 and cause areas Aa2 and Ab2 for causing culling of the crop C which has been scorched and guided are formed.

  The left pulling device 22A is operated by the power transmitted from the input shaft 38 of the cutting and conveying unit 3 via the transmission shaft 40, the relay shaft 42, the power distribution shaft 44, the left transmission shaft 46, and the like. By this operation, a maximum of two crop C grains are introduced between the left weed member 21A and the middle weed member 21C.

  The right pulling device 22B is transmitted from the input shaft 38 of the cutting and conveying unit 3 through the transmission shaft 40, the relay shaft 42, the power distribution shaft 44, the right transmission shaft 48, the chain transmission mechanism 62, and the like. It is configured to cause a maximum of two crop C culms introduced between the right weed member 21B and the middle weed member 21C.

  Accordingly, the left and right pulling frames 26A and 26B can be configured for two lines that cause a maximum of two grain culms, and the cutting and conveying unit 3 is formed by a pair of left and right pulling frames 26A and 26B. It can be configured to a 2-frame 4-strip cutting specification for harvesting. As a result, as compared with a general three-frame four-line mowing specification cutting and conveying unit configured to harvest four crops C at maximum with four weed members and three pulling devices. The configuration can be simplified and the cost can be reduced while being configured to have a wide working width.

  Further, by forming guide areas Aa1 and Ab1 and raising areas Aa2 and Ab2 in the left and right pulling devices 22A and 22B, the structure of the two-frame four-line specification is simplified, but four crop grains Can cause wrinkles smoothly and well.

  In addition, the archless that does not need to install a heavy shaft transmission mechanism for interlockingly connecting the input and receiving shafts 53A and 53B provided on the upper parts of the left and right pulling devices 22A and 22B. As a result, the centroid position of the cutting and conveying section 3 can be lowered as compared with the case where an arch structure in which an axial transmission mechanism is installed over the upper portions of the left and right pulling devices 22A and 22B is adopted. And the stability of the vehicle body can be improved.

  By the way, although not shown in the figure, when an archless structure is adopted for the cutting and conveying part of the three-frame four-saw cutting specification, the transmission system for the pulling device disposed on the left and right center side of the cutting and conveying part is used as the conveying path for the cereals. It is necessary to arrange at the bottom of the left and right center side of the cutting and conveying unit that is below. If the transmission system is arranged in such a position, foreign matters such as mud and weeds are likely to accumulate on the transmission system case, and if the culm comes into contact with the accumulated foreign matter, the conveying posture of the cereal may be disturbed. Due to this disturbance, the alignment on the tip side becomes worse when the supply and transport device 25 transports the cereal toward the threshing device 4. Then, in the case of the threshing process in the threshing device 4, unhandled residue is likely to occur, and the grain recovery efficiency is likely to be reduced.

  On the other hand, the cutting and conveying unit 3 according to the present invention is a two-frame four-row cutting specification that does not require a pulling device on the left and right center sides while being a four-row cutting, and thus is caused by the accumulation of such foreign matters. A drop in grain recovery efficiency can be avoided in advance.

As shown in FIGS. 6 to 8, 10, and 11, the left raising case 52 </ b> A has a lower portion supported by the left weed support rod 50 </ b> A via a left support member 66 </ b> A. The upper part is supported by the support member 36. The lower part of the right raising case 52B is supported by the right weed support rod 50B via the right support member 66B. The upper part is connected to the upper part of the left pulling case 52 </ b> A by an arch-shaped connecting member 67. That is, the upper part of the right pulling case 52B is supported by the support member 36 via the connecting member 67 and the left pulling case 52A. With these support structures, the left and right pulling devices 22A and 22B are mounted on the cutting and conveying unit 3 in a rearward tilt position located on the rear side of the vehicle body as the upper side thereof.

  As the left and right pulling devices 22A and 22B, instead of the structure in which the guide areas Aa1 and Ab1 are formed by scraping and moving the plurality of pulling claws 59A and 59B in the left and right directions, as the vehicle body travels, You may make it employ | adopt the structure which forms guide area | region Aa1 and Ab1 with the guide member which raises the grain culm of crop C, and slides and guides toward area | region Aa2 and Ab2.

As shown in FIGS. 4 to 9, the cutting device 23 is supported by the weed support rods 50A to 50C of the weed members 21A to 21C. A plurality of movable blades 68 aligned and arranged in a straight line in the left-right direction on the upper side thereof, and a plurality of fixed blades arranged in a line in a straight line in the left-right direction on the lower side thereof By reciprocating with a fixed stroke in the left-right direction with respect to 69, the cereal of the crop C caused by the left and right pulling devices 22A, 22B is cut off. Each movable blade 68 slides back and forth with a fixed stroke in the left-right direction with respect to the fixed blade 69 by interlocking with the power distribution shaft 44 via a crank-type cutting blade driving device 70.

  In other words, the cutting device 23 is operated by the power transmitted from the power distribution shaft 44 of the cutting conveyance unit 3 via the cutting blade driving device 70, and by this operation, the crop C caused by the left and right pulling devices 22A and 22B is operated. It is configured to reap cereals.

  FIG. 13 is a cross-sectional plan view of the main part showing the configuration of the pick-up and transfer devices 24A and 24B, and FIG. 14 is a cross-sectional plan view of the main part showing the structures of the pick-up and transfer devices 24A and 24B and the supply transfer device 25. As shown in FIGS. 5 to 10, 13, and 14, the left and right scraping and transporting devices 24 </ b> A and 24 </ b> B are belt-type scraping and transporting mechanisms 71 </ b> A and 71 </ b> B that act on the upper part of the cereal stock side. The puckers 72A and 72B as rotating bodies that act on the lower part of the cereal stock side are disposed up and down, and the scraper transport mechanisms 71A and 71B and the packers 72A and 72B are scraped between them. The guide members 73A and 73B for guiding the cereal are provided in the conveying area. The left and right scraping and transporting mechanisms 71A and 71B are composed of rubber scraping belts 74A and 74B, in which a plurality of projecting portions 74a and 74b for scraping transport are integrally formed at a constant pitch, and large-diameter driving pulleys 75A and 75B. It is configured to rotate over the small-diameter driven pulleys 76A and 76B. Covering the driving pulleys 75A and 75B and the driven pulleys 76A and 76B from above along the belt sides of the scraping belts 74A and 74B, the scraping and transporting mechanisms 71A and 71B are provided above the left and right scraping and transporting mechanisms 71A and 71B. Covers 77A and 77B for preventing the wrapping of the cereals with respect to the The left and right packers 72A and 72B are integrally formed with a plurality of projecting portions 72a and 72b for scraping and transporting on the outer periphery thereof.

  The left scraping and transporting device 24A has an L-shaped support shaft so that the drive pulley 75A and the packer 72A of the scraping and transporting mechanism 71A are positioned in a rotatable state on the left and right center side of the cutting and transporting unit 3. The support member 36 is supported via 78. Further, the left auxiliary member integrally provided on the left end portion of the left support member 66A so that the driven pulley 76A of the scraping transfer mechanism 71A is positioned at the front end of the vehicle body with respect to the drive pulley 75A at the left end portion of the cutting transfer portion 3. 79A.

  The right drive unit 24B has a cylindrical shaft 80 that is externally fitted to the right transmission shaft 48 so that the drive pulley 75B and the packer 72B of the drive unit 71B are positioned on the left and right center side of the cutting transfer unit 3. Is equipped. That is, the right transmission shaft 48 and the cylinder shaft 80 function as a support member that supports the drive pulley 75B and the packer 72B of the take-up conveyance mechanism 71B. Further, the right auxiliary member integrally provided at the right end portion of the right support member 66B so that the driven pulley 76B of the scraping and conveying mechanism 71B is positioned at the front end of the vehicle body relative to the driving pulley 75B at the right end portion of the cutting and conveying portion 3. 79B.

  With this support structure, the left and right scavenging and transporting devices 24A and 24B are configured such that, in a state where the cutting and transporting unit 3 is positioned in the work area, the postures of the scavenging and transporting mechanisms 71A and 71B Equipped in the cutting and conveying section 3 so that the left and right central sides are inclined to the rear side of the vehicle body, and the rearwardly inclined posture is set, and the postures of the packers 72A and 72B are the upwardly inclined posture. It is.

  As a result, the left and right scraping and conveying devices 24A and 24B are provided on the left and right sides of the cutting and conveying unit 3 by the protruding portions 74a and 74b of the scraping belts 74A and 74B and the protruding portions 72a and 72b of the packers 72A and 72B. While picking up the harvested culm located in the conveying area from the lower side of the left and right outer sides, it was raked toward the culm passing part 27 and immediately before the culm passing part 27 While accepting and lifting the cereal from the front lower side, it is raked into the cereal passage passing part 27, and in the cereal passing part 27, the cereal passing part 27 is received and lifted from the front lower side. The grain passing portion 27 is allowed to pass by being scraped toward the supply and transport device 25 located behind the head.

  As a result, when scraping and transporting the cereal after harvesting by the left and right scavenging and transporting devices 24A and 24B, it is possible to make the stocker side of the cereal difficult to contact the reaping device 23. Due to the contact, the conveying posture of the cereal is disturbed, and due to the disturbance, the alignment of the tip side when conveying the cereal toward the threshing device 4 by the supply conveying device 25 becomes worse, and the threshing in the threshing device 4 It is possible to avoid a drop in the grain recovery rate such that unhandled items are likely to occur in the process.

  The left driving and conveying device 24A is integrally formed with the driving pulley 75A and the packer 72A so that the driving pulley 75A and the packer 72A of the driving and conveying mechanism 71A rotate together. The right-hand drive mechanism 24B connects the drive pulley 75B and the packer 72B to the cylinder shaft 80 so that the drive pulley 75B and the packer 72B of the drive mechanism 71B rotate integrally with the cylinder shaft 80. is there. The cylindrical shaft 80 is interlocked with the right transmission shaft 48 via a gear type reduction mechanism 81. The left packer 72A meshes with and interlocks with the right packer 72B.

  That is, the left and right scraping and conveying devices 24A and 24B are operated by the power transmitted from the right transmission shaft 48 via the speed reduction mechanism 81 and the cylinder shaft 80, and by this operation, the harvested cereals are converted into the left and right packers. It is configured such that it is scraped and conveyed toward the grain passer 27 which is the meshing part of 72A and 72B, and is scraped and transported from the grain passer 27 toward the rear supply transport device 25.

  As shown in FIGS. 1, 3, 4 to 7, and 14, the supply and transport device 25 is a cereal stock that has been scraped to the rear of the cereal passing portion 27 by the left and right scraping and transporting devices 24 </ b> A and 24 </ b> B. The stock holding and conveying mechanism 82 that holds the former side and conveys it toward the holding and conveying mechanism 31 of the threshing device 4, and the tip side of the grain culm is locked and conveyed toward the supply port 4 </ b> A of the threshing device 4. A tip locking and conveying mechanism 83 is arranged vertically. The stock holding and conveying mechanism 82 and the tip locking and conveying mechanism 83 are configured so that the transmission shaft 84 functioning as an input shaft thereof is linked to the input shaft 38 of the reaping and conveying unit 3 via a pair of bevel gears 85, thereby passing the cereal. The cereals that have passed through the section 27 are configured to be supplied and conveyed toward the threshing device 4 while changing the posture from the standing posture to the right-falling posture for threshing.

  The supply conveyance device 25 is configured to be able to swing up and down about the input shaft 38 of the harvesting conveyance unit 3 located at the conveyance end portion 25a. And by this up-and-down swing, the conveyance start end part 25b can be position-adjusted in the cocoon length direction with respect to the culm that has passed through the culm passing part 27. The supply length on the tip side with respect to the inside of the threshing device 4 can be changed, and the handling depth adjustment for adjusting the handling depth of the cereal by the threshing device 4 can be performed.

  The cutting and conveying unit 3 is provided with a guide rod 86 that swings and guides the conveyance start end portion 25b of the supply and conveyance device 25 in the vertical direction while suppressing the lateral movement of the supply and conveyance device 25. The guide rod 86 is curved in a circular arc shape with the swing fulcrum of the supply / conveyance device 25 as the center.

  The supply / conveyance device 25 is configured to swing the supply / conveyance device 25 in the vertical direction with the input shaft 38 of the cutting / conveyance unit 3 as a fulcrum, so that the conveyance start end 25b of the supply / conveyance device 25 is connected to the grain passing portion 27. The adjusting means 87 which adjusts the position in the cocoon length direction with respect to the cereal mash that has passed through is provided. In addition, a support frame 90 is provided that supports the pinching guide rods 89 of the stock holding pinch conveyance mechanism 82 across the grain haul conveyance route 88 of the supply conveyance device 25.

  The adjustment means 87 is operated by an electric motor 91 provided in the cutting and conveying unit 3, and a pinion gear (not shown) provided on an output shaft (not shown) of the electric motor 91 and a sector gear 92 that meshes with the pinion gear. By swinging the swing arm 93 that is integrated with the sector gear 92, the supply and transport device 25 linked to the swing arm 93 via the suspension rod 94 is driven to swing in the vertical direction. It is configured.

  The support frame 90 is provided with a tip sensor 95 that detects the tip position of the culm that is transported by the supply transport device 25. The tip sensor 95 includes a pair of sensor arms 96A and 96B. The pair of sensor arms 96 </ b> A and 96 </ b> B are arranged so as to be positioned at a predetermined interval in the cocoon length direction on the tip side of the grain pods conveyed by the supply conveyance device 25. Then, the tip sensor 95 outputs the tip position of the grain pod detected by the pair of sensor arms 96A and 96B to a control device 97 configured using a microcomputer. The control device 97 handles the operation of the electric motor 91 of the adjusting means 87 so that the length of the tip side of the cereal supplied to the inside of the threshing device 4 is constant based on the output of the tip sensor 95. A control means 97A for adjusting the depth is provided. The control means 97A is in a state in which the sensor arm 96A located on the stock side of the grain pod detects the tip side of the grain pod and the sensor arm 96B located on the side of the grain pod does not detect the tip side of the grain pod By controlling the operation of the electric motor 91, the length of the tip side of the corn straw supplied to the inside of the threshing device 4 is made constant.

  Although illustration is omitted, the pair of sensor arms 96A and 96B are configured to be able to integrally change the position in the cocoon length direction with respect to the culm conveyed by the supply conveyance device 25. And by this position change, the position of both sensor arms 96A and 96B is changed to the stockholder side of the cereal, thereby the cereal that supplies the threshing depth of the cereal by the threshing device 4 to the inside of the threshing device 4 It can be adjusted to the shallow handling side to shorten the tip length. Further, by changing the position of both sensor arms 96A and 96B to the tip side of the cereal, the handling depth of the cereal by the threshing device 4 is increased, and the tip length of the cereal that supplies the inside of the threshing device 4 is increased. It can be adjusted to the deep handling side.

  As shown in FIGS. 1 to 3, 6, and 7, the tip sensor 95 is equipped with an operation lever 98 that enables a position change operation of the pair of sensor arms 96 </ b> A and 96 </ b> B. The operation lever 98 is set so as to be located at a position close to the boarding operation unit 2 in the tip sensor 95. Thereby, the operation lever 98 can be operated while staying in the boarding operation part 2, and the handling depth of the cereal by the threshing apparatus 4 can be adjusted.

  As shown in FIGS. 8, 9, and 13, in the cutting and conveying unit 3, the middle weed member 21 </ b> C has the valley diameters da and db of the left and right packers 72 </ b> A and 72 </ b> B that are within the left and right widths of the grain passer 27. It is arranged so as to be located between them.

  With this arrangement, when the cedar after harvesting is transported toward the cereal passing part 27 by the left and right scraping and conveying devices 24A and 24B, the cereal is moved so as to straddle the middle weed member 21C. Can be prevented. As a result, compared with the case where the cereals straddle the middle weed member 21C, the stock side of the cereal can be made less likely to come into contact with the middle weed member 21C. Due to the disorder of the conveying posture, the alignment of the tip side when conveying the cereal toward the threshing device 4 by the supply conveying device 25 becomes worse, and unhandled residue is likely to occur in the threshing process in the threshing device 4. It is possible to avoid a decrease in the grain recovery rate.

  In addition, as described above, the left and right scavenging and conveying devices 24A and 24B are configured so that the posture of the scavenging and conveying mechanisms 71A and 71B is the cutting and conveying unit 3 in a state where the cutting and conveying unit 3 is positioned in the work area. The left and right central sides of the packer 72A and the rearwardly inclined posture are rearwardly inclined and the postures of the packers 72A and 72B are rearwardly upward inclined postures. With respect to the middle weed member 21C that assumes a horizontal posture or a substantially horizontal posture when positioned in the area, the lower side in the transport direction is separated from the middle weed member 21C upward. Thereby, it is possible to prevent the cereal straw that has been scraped and conveyed toward the cereal passing part 27 by the left and right rake conveying devices 24A and 24B from contacting the middle weed member 21C in the cereal passing part 27. As a result, it is possible to prevent a decrease in the grain recovery rate due to the disturbance of the posture of conveying the culm due to the contact.

  FIG. 15 is a schematic plan view of the main part showing the working state of four-line cutting, and FIG. 16 is a schematic plan view of the main part showing the working state of three-line cutting. As shown in FIGS. 3, 4, 15, and 16, the left weeding member 21 </ b> A located at the left end of the mowing and conveying unit 3 (one left and right end on the side away from the boarding operation unit 2 in the mowing and conveying unit 3). The crawler 13A on the left side (the side away from the boarding operation unit 2) is arranged so that the positions of the left weeding start end 21Aa of the left weeding member 21A and the left end portion 13Aa of the left crawler 13A in the left-right direction of the vehicle body coincide with each other. It is. Also, the right weeding member 21B located at the right end of the cutting and conveying section 3 (one left and right end on the boarding operation section side in the cutting and conveying section 3) and the right crawler 13B on the right (boarding operation section side) are crawlers on the right side. The right end portion 13Ba of the right weeding member 21B slightly protrudes from the weeding start end 21Ba of the right weeding member 21B to the right outer side of the vehicle body, and the right end portion of the right weeding member 21B and the right crawler 13B. It is arranged so that the position of 13Ba in the left-right direction of the vehicle body substantially matches.

  In other words, the left and right crawlers 13A, 13B have a distance L between the end portions on the laterally outer side of the vehicle body larger than the working width W of the cutting and conveying unit 3 configured to enable the cutting and conveying of up to four items. Thus, they are arranged at predetermined intervals in the left-right direction. As a result, the distance between the left and right crawlers 13A and 13B can be increased, and the wetland performance can be improved without causing a decrease in turning performance by increasing the contact length of each of the crawlers 13A and 13B. it can.

  In addition, the left crawler 13A is prevented from protruding to the left side of the vehicle body from the grass start end 21Aa because the position of the left end portion 13Aa coincides with the weed start end 21Aa of the left weed member 21A in the left-right direction. ing. As a result, the left side of the traveling vehicle body 1 such as an uncut crop Cx that exists on the left outer side of the traveling vehicle body 1 or a middle split operation that includes uncut crops Cx and Cy on the left and right outer sides of the traveling vehicle body 1 The crawler 13A steps on an uncut crop Cx located near the left outer side, or the left crawler 13A muds the uncut crop Cx located near the left outer side. Generation | occurrence | production can be prevented and the fall of the working efficiency resulting from the stepping and mud gathering can be avoided.

  On the other hand, the crawler 13B on the right side has its right end portion 13Ba substantially coincides with the weed start end 21Ba of the right weed member 21B in the left-right direction. At the time of work traveling such as splitting where Cy is present, the weeding start edge 21Ba of the right weeding member 21B is the rightmost crop Cb within the work width of the cutting and conveying unit 3 and the crop outside the work width adjacent to this crop Cb. If it is set so that it passes through the side of the crop Cb within the work width with the Cy, the right crawler 13B prevents the inconvenience of stepping on the uncut crop Cy located near the right outside. And a decrease in work efficiency due to the trampling can be avoided.

  Incidentally, the protrusion length Lz of the right weeding member 21B from the weed start end 21Ba to the right outer side of the vehicle body on the right crawler 13B is determined by the right crawler 13B being stepped on the uncut crop Cy near the right outer side of the vehicle body. If the length can be prevented, for example, it can be set to various lengths such as Lz = 1/3 * Sc and Lz = 1/4 * Sc from the relationship with the planting interval Sc of the crop C. However, it is preferable to satisfy Lz ≦ 1/6 * Sc. And, as the protrusion length Lz is shorter, mud gathering with respect to the uncut crop Cy near the right outer side of the vehicle body by the right crawler 13B can be suppressed, and the reduction in work efficiency due to the mud gathering is suppressed. be able to. Conversely, the longer the protrusion length Lz, the longer the distance between the left and right crawlers 13A and 13B can be, and the wetland performance can be improved.

  That is, it is configured as a full hunting specification that can prevent the left and right crawlers 13A and 13B from stepping on the uncut crops Cx and Cy and the mud approaching to the uncut crops Cx and Cy during work such as turning and splitting. can do.

  The right crawler 13B is positioned such that its right end portion 13Ba coincides with the weeding start end 21Ba of the right weeding member 21B in the left-right direction, or is located inward of the weeding start end 21Ba of the right weeding member 21B. You may arrange so that. Further, the left crawler 13A may be arranged so that the left end portion 13Aa thereof is located on the inner side of the vehicle body with respect to the weed start end 21Aa of the left weed member 21A. The left end portion 13Aa of the left weeding member 21A is located on the left outer side of the vehicle body within a range in which it is possible to prevent the neighboring uncut crop Cx from being stepped on and to suppress mud approach to the uncut crop Cx. You may arrange | position so that it may be located in.

  As shown in FIG. 15, the three weeding members 21 </ b> A to 21 </ b> C have the right weeding member 21 </ b> B at the time of the operation of harvesting the four crops C, and the grass starting end 21 </ b> Ba is the working width of the cutting and conveying unit 3. For the crop C to pass through the side of the crop Cb within the work width between the rightmost crop Cb and the crop Cy or crop cut Cz outside the right work width adjacent to the crop Cb. The middle weed member 21C passes through an intermediate position or a substantially intermediate position between the two crops Cc and Cd located on the left and right center sides within the work width to be acted on, and the left portion The grass member 21A is located between the leftmost crop Ca within the work width of the cutting and conveying unit 3 and the intermediate position between the crop Cx or the crop cut Cz outside the left work width adjacent to the crop Ca. To pass the position close to the crop Ca within the working width It is the location.

  That is, at the time of the four-row cutting operation, the weeding start end 21Ba of the right weeding member 21B with high visibility from the boarding operation unit 2 is positioned at the front lower side of the boarding operation unit 2, and the rightmost within the working width The left weed member 21A and the middle weed member 21C having low visibility from the boarding operation unit 2 by moving away from the boarding operation unit 2 by positioning the crop Cb located near the right side of the crop Cb. Without visually recognizing them, it is possible to pass through an appropriate position that is out of the planting position of the crop C, and it is possible to avoid pushing down and stepping on the crop C by the weeding members 21A and 21C.

  Thereby, even if the lodging of the crop C is intense, each weeding member 21A-21B can be easily and reliably aligned with the appropriate position with respect to the crop C, and each weeding member 21A-21B and left and right The pulling devices 22A and 22B can be used to efficiently raise cereals.

  Further, the middle weed member 21C is introduced into the frame of the left raising frame 26A by passing through an intermediate position or a substantially intermediate position between the two crops Cc and Cd located on the left and right center side within the work width 2. The cereals of the crops Ca and Cc and the cereals of the two crops Cb and Cd introduced in the frame of the right pulling frame 26B are passed through the cereals located just above the middle weed member 21C. It can be located in the left-right symmetrical position on both sides of the part 27, and the distance from the culm passing part 27 of the cereals which become the right and left object can be shortened uniformly.

  Thereby, while the grain culm of each crop C is introduced into the left and right pull-up frames 26A, 26B, the middle weed member 21C has two crops Cc, By greatly deviating from the intermediate position of Cd, the distance from the culm passing portion 27 of the cereal introduced into either one of the left and right pulling frames 26A, 26B becomes unnecessarily long, and either the left or right is scratched. It can prevent that the conveyance efficiency of the grain straw by conveyance apparatus 24A, 24B falls. Further, it is possible to prevent an unnecessary delay in the transportation of the cereals by either the left or right scraping and transporting device 24A, 24B. The apparatus 25 prevents a reduction in the grain recovery rate such that the alignment of the tip side when conveying the cereal toward the threshing device 4 is poor, and unhandled items are easily generated in the threshing process in the threshing device 4. be able to.

  In addition, when the left weed member 21A passes near the left side of the leftmost crop Ca within the work width, the right weed member 21B is always divided during the operation of harvesting the four crops C. It is necessary to align the grass start edge 21Ba so as to pass near the right side of the crop Cb located at the rightmost position within the work width.

  Thereby, at the time of the work traveling for harvesting the four crops C, the weeding members 21A to 21C can be surely passed through the appropriate positions described above with respect to the crop C. It is possible to improve the workability at the time of the work traveling for harvesting the crop C.

  As shown in FIG. 16, the three weeding members 21 </ b> A to 21 </ b> C have the right weeding member 21 </ b> B at the time of the operation of harvesting the three crops C, and the grass starting end 21 </ b> Ba is the working width of the cutting and conveying unit 3. When positioning with respect to the right crop crop Cz so as to pass above the right crop crop Cz adjacent to the rightmost crop Cb, the middle weed member 21C is subject to its action. The left weeding member 21A passes through a position closer to the crop Cc on the right and left center side than the right crop Cb between the two crops Cb and Cc located on the right side and the left and right center side within the working width. The intermediate position between the leftmost crop Ca within the work width of the cutting and transporting unit 3 and the crop Cx outside the left work width adjacent to the crop Ca or the crop cutting trace Cz, which is the target of the action It is arranged to pass through an intermediate position.

  That is, at the time of the three-row cutting operation, the weeding start end 21Ba of the right weeding member 21B with high visibility from the boarding operation unit 2 is positioned at the front lower side of the boarding operation unit 2, and the right cutting mark Cz is By positioning so as to pass above, the left weeding member 21A and the middle weeding member 21C, which are less visible from the boarding driving unit 2 by moving away from the boarding driving unit 2, without visually recognizing them, It is possible to pass through an appropriate position away from the planting position of the crop C, and it is possible to avoid pushing down and stepping on the crop C by the weeding members 21A and 21C.

  Thereby, even if the lodging of the crop C is intense, the right weed member 21B and the middle weed member 21C can be easily and reliably aligned at appropriate positions with respect to the crop C, and each weed member 21A. -21B and the left and right pulling devices 22A and 22B can be used to efficiently cause cereals.

  Further, the middle weed member 21C passes near the right side of the crop Cc located on the left and right center side within the work width, so that the two crops Ca and Cc introduced into the frame of the left pulling frame 26A. Of the cereal grains and the cereal grains of one crop Cb introduced into the frame of the right pull-up frame 26B, the leftmost crop Ca from the cereal passage part 27 located directly above the middle weed member 21C Can be made to have the shortest distance from the grain passing section 27.

  Thereby, the conveyance efficiency at the time of carrying out the scraping conveyance of the 3 grains of cereals toward the cereal passing part 27 by the left and right rake conveying devices 24A, 24B can be improved. Further, it is possible to prevent an unnecessary delay in the transportation of the cereals by either the left or right scraping and transporting device 24A, 24B. The apparatus 25 prevents a reduction in the grain recovery rate such that the alignment of the tip side when conveying the cereal toward the threshing device 4 is poor, and unhandled items are easily generated in the threshing process in the threshing device 4. be able to.

  Moreover, the left weeding member 21A passes through an intermediate position or a substantially intermediate position between the crop Ca located at the leftmost position within the work width and the crop Cx or the crop cutting trace Cz outside the left work width. When traveling for harvesting three crops C, the left weed member 21A having the lowest visibility from the boarding operation unit 2 is farthest from the planting position of the crop C to be acted on within the working range. Can be located at different positions.

  Thus, during the operation of harvesting the three crops C, the left weeding member 21A having the lowest visibility from the boarding operation unit 2 can be favorably applied to the crop C to be acted on, and the left It can prevent more reliably that the weeding member 21A is located in the planting position of the crop C to be acted on.

Incidentally, as a specific arrangement of the three weeding members 21A to 21C for satisfying the positional relationship between the three weeding members 21A to 21C and the crop C described above, the left-right distance Sa between the three weeding members 21A to 21C , Sb and the planting interval Sc of the crop C are arranged such that Sa = Sb = 1.75 * Sc, arrangement where Sa = Sb≈1.75 * Sc, or Sa> Sb and Sa≈1 .75 * Sc and Sb≈1.75 * Sc, and Sa <Sb and Sa≈1.75 * Sc and Sb≈1.75 * Sc are considered. During the operation of harvesting the four crops C, the separation distance La between the left weed member 21A and the leftmost crop Ca within the work width located on the right side thereof is the right weed member 21B and the left side thereof. It is preferable that the distance Lb be larger than the distance Lb from the rightmost crop Cb in the work width located at the position.

  As shown in FIGS. 3, 4, and 8, the left and right weeding members 21 </ b> A and 21 </ b> B are positioned so that the postures of the weeding tools 51 </ b> A and 51 </ b> B are closer to the vehicle interior side in the vehicle lateral direction toward the rear of the vehicle body. It is configured to have an inclined posture. Thereby, the crops Ca and Cb positioned at the left and right ends in the work width of the cutting and conveying unit 3 can be easily moved toward the left and right center in the work width.

  As shown in FIGS. 1 to 4 and FIGS. 6 to 9, the cutting and conveying unit 3 includes a left weed basket 99A, a right weed 99B, and a middle weed 99C.

  As shown in FIGS. 1, 3, 4, and 6, the left weed tackle 99 </ b> A is tilted so as to project outward from the left side of the traveling vehicle body 1 to the left side of the cutting and conveying unit 3. It is equipped so that the posture can be changed by swinging to the retracted posture standing so as to retreat to the traveling vehicle body side. Then, by switching the left weed fence 99A to the action posture, it is possible to prevent the uncut crop Cx existing on the left outer side of the traveling vehicle body 1 from falling to the vehicle body inner side.

  FIG. 17 is a perspective view of the main part showing the attachment structure on the weed terminal end side of the left weed ridge 99A. As shown in FIGS. 1, 3, 4, 6, and 17, the left weed ridge 99 </ b> A is capable of swinging its starting weed end 99 a to the left weed tool 51 </ b> A via the first connecting portion 100. It is connected to. Further, the extended end portion 101 a of the connecting rod 101 extending from the end portion of the weed is connected to the support member 36 of the cutting and conveying unit 3 through the second connecting portion 102 so as to be swingable.

  The first connecting portion 100 includes an L-shaped bracket 103 welded to the left weeding tool 51A, and a connecting pin 104 that connects the bracket 103 to the weeding start end portion 99a of the left weed ridge 99A so as to be swingable. The connecting pin 104 is configured to be close to the left side portion of the left weed tool 51A.

  The second connecting portion 102 includes a bracket 105 welded to the support member 36, a connecting pin 106 that swingably connects the extended end 101a of the connecting rod 101 to the bracket 105, and the posture of the left weed rod 99A. It is constituted by a holding mechanism 107 that enables the above. Then, by effectively using the space present immediately after the left end of the left pulling frame 26A, the left end of the crawler 13A on the left and right central side of the cutting and conveying unit 3 relative to the first connecting unit 100 It arrange | positions so that it may be located in the left-right center side of the traveling vehicle body 1 rather than part 13Aa.

  The holding mechanism 107 forms an arc-shaped long hole 105a centering on the connecting pin 106 in the bracket 105, and after inserting the bolt 108 into the long hole 105a, the compression spring 109 is removed from the insertion start end side of the bolt 108. The pair of nuts 110 are screwed together and the extension end portion 101a of the connecting rod 101 and the bracket 105 are pressed against each other by the action of the compression spring 109, whereby the left weed rod 99A along the long hole 105a. The posture of the left weed fence 99A is held while allowing the swinging operation between the action posture and the retracted posture.

  With the above configuration, even if the second connecting portion 102 is configured to be large with the holding mechanism 107, the left end portion of the cutting and conveying unit 3 can be used in the state where the posture of the left weed tackle 99A is switched to the retracted posture. In the case of a traveling operation in which the second cropped portion C is placed and harvests the crop C at the time of dredging, it is possible to avoid the possibility that the second connecting portion 102 contacts and deforms other things such as the straw. This is particularly effective in preventing the deformation of the second connecting portion 102 due to contact with the concrete block in a farm field in which the ridges are formed low with a concrete block or the like.

  Further, the swing axis P of the left weed ridge 99A passing through the centers of the connection pin 104 of the first connection unit 100 and the connection pin 106 of the second connection unit 102 is cut and conveyed toward the rear side of the cutting and conveying unit 3. Compared to the case where the swing axis P of the left weed culvert 99A is set to a posture along the front-rear direction of the cutting and conveying unit 3 by the inclined posture positioned on the left and right center side of the portion 3, the left weed It is possible to reduce the operating angle when swinging the rod 99A between the retracted posture and the acting posture, and it is possible to improve the operability of the left weed rod 99A.

  FIG. 18 is a plan view of the main part showing a state in which the left weed fence 99A is switched to the retracted position. As shown in FIGS. 4 and 18, in the retracted posture, the left weed rod 99 </ b> A is in a state in which the weed terminal end portion 99 b is located closer to the left and right center side of the traveling vehicle body 1 than the left end of the cutting and conveying unit 3. The position in the left-right direction of the vehicle body between the weed terminal portion 99b and the left end of the cutting and conveying unit 3 is configured to be substantially the same.

  As a result, the left weed culm 99A is in its retracted position with its weeding terminal end 99b positioned closer to the left and right center of the traveling vehicle body 1 than the left end 13Aa of the left crawler 13A. The positions of 99b and the left end 13Aa of the left crawler 13A in the left-right direction of the vehicle body substantially coincide with each other.

  That is, by switching the left weed rod 99A to the retracted position, the weed terminal end portion 99b of the left weed rod 99A is located on the traveling vehicle body 1 more than the left end 13Aa of the left crawler 13A and the left crawler 13A. It can be positioned on the left and right center side, so that the entire left weed fence 99A is more than the left outer end of the nipping and conveying mechanism 31 located on the left outer side of the vehicle body with respect to the left end portion 13Aa of the left crawler 13A. It can be located on the vehicle body inner side in the vehicle body left-right direction. As a result, as compared with the case where the weed terminal portion 99b of the left weed basket 99A is located on the left outer side of the vehicle body from the left outer end of the pinch transport mechanism 31, the left weed basket 99A is in the retracted position. The left and right widths of the combine as a whole in the switched state can be reduced, and the storage property for a barn or the like can be improved.

  In the retracted posture, the left weed culm 99A is configured such that its weed terminal end portion 99b is located on the vehicle body upper side with respect to the grain culm transport path 88 of the supply transport device 25. Thereby, even in the state in which the left weed cocoon 99A is switched to the retracted position, the cereal is directed toward the threshing device 4 without being brought into contact with the weed terminal end portion 99b of the left weed culm 99A by the feeding and conveying device 25. Can be transported.

  In other words, even if the left side weed basket 99A is switched to the retracted position, there is a risk that the cereal grain conveyed by the supply and transport device 25 may come into contact with the weed terminal end portion 99b of the left weed ridge 99A. Can be avoided. As a result, the cereal conveyance posture is disturbed due to the contact, so that the alignment of the tip side of the cereal is deteriorated, and the unprocessed cereal in the threshing process in the threshing device 4 is likely to occur. A decrease in the grain recovery rate can be avoided in advance.

  In addition, in the state where the left weed basket 99A is switched to the retracted position, the entire left weed basket 99A is located on the inner side of the vehicle body in the left-right direction of the vehicle body with respect to the left outer end of the pinch transport mechanism 31 of the threshing device 4. By doing so, when performing work traveling at the shore, it is possible to perform the traveling while the vehicle body is closer to the heel, and it becomes easier to align the left weed member 21A with respect to the crop C at the shore. As a result, workability at the heel can be improved.

  For crop C, which is about 65-75 cm long and has a low risk of lodging, the left weed pod 99A should be switched to the retracted position so that the left weed 99A does not act on the tip. Thus, it is possible to avoid the possibility that the left weed cocoon 99A acts as a weed on the cereal of the crop C, so that the grain can be removed from the cereal, and as a result, the grain recovery efficiency can be improved. it can. This is particularly effective when harvesting indica rice and the like that are easily shed.

  As shown in FIGS. 1 to 4 and FIGS. 6 to 8, the middle split weed 99C is positioned at the front end portion of the cutting and conveying unit 3 so as to be positioned at a substantially intermediate position between the left and right pulling devices 22A and 22B. It is erected over the connecting member 67 from the grass tool 51C.

As a result, each pulling device 22A, 22B falls down toward the other pulling device 22A, 22B by the scraping action of the pulling claws 59A, 59B in the guide areas Aa1, Ab1 of the left and right pulling devices 22A, 22B. The grain culm of the crop C that crosses in the front view of the vehicle body on the front side of the vehicle body of the guide regions Aa1 and Ab1 of 22B is guided by the middle weed culm 99C to guide the region Aa1 of the corresponding pulling devices 22A and 22B. , Ab1 can be divided into left and right.

As a result, culms crop C to harvest, each inking unit 22A, the causes pawl 59A in the guide region Aa1, Ab1 of 22B, by raking action of 59B, each inking unit 22A, 22B guide region Aa1, Ab1 of At the front side of the vehicle body, it is possible to avoid the possibility of crossing and entangled in front view of the vehicle body, and it is possible to prevent crop culm caused by the entanglement and reduce the efficiency and cause the occurrence of defects.

  As shown in FIGS. 3, 4, 8, 12, and 13, the two-row pulling device 22 </ b> B provided on the right pulling frame 26 </ b> B is located on the left side where the raising region Ab <b> 2 is separated from the boarding operation unit 2. It is comprised so that it may do.

  As a result, the vehicle body from the riding operation section 2 is compared with the case where the right pulling frame 26B is equipped with a two-row pulling device configured such that the raising area Ab2 is positioned on the right side which is the boarding operation section side. The visibility to the front can be improved, and the visibility from the boarding operation unit 2 to the work place in front of the vehicle body can be improved.

  The left and right pulling devices 22A and 22B are formed such that the left and right widths Wa and Wb of the raising areas Aa2 and Ab2 are wide enough to cause up to two ridges. Further, the raising claws 59A, 59B provided in the left and right raising devices 22A, 22B are formed in a long length corresponding to the wide raising areas Aa2, Ab2.

  Accordingly, when the left and right pulling devices 22A and 22B are in a four-row mowing operation that always causes two ridges of potatoes, the resistance when the culm passes through the corresponding right and left trigger areas Aa2 and Ab2 is within an allowable range. Can be prevented. As a result, it is possible to smoothly and satisfactorily raise the cereal by the left and right pulling devices 22A and 22B even during the four-saw cutting operation.

  In addition, by forming the pulling claws 59A and 59B in a length corresponding to the wide trigger areas Aa2 and Ab2, the dead zones in which the trigger claws 59A and 59B do not act on the cereals in the wide trigger areas Aa2 and Ab2. Can be prevented from being formed. As a result, while causing each of the raising regions Aa2 and Ab2 of the left and right pulling devices 22A and 22B to be wide enough to allow passage of the two rows of wheat straw, the right and left pulling devices 22A and 22B are surely caused to cause Can be done.

  By the way, regardless of the time when the three-row mowing operation is running or the time when the 4-row mowing work is running, only the left pulling device 22A to which two rows of cereals are always supplied is caused, and the left and right width Wa of the area Aa2 is increased. You may comprise so that it may become wide corresponding to the raise of a maximum of 2 grain ridges, and the raising nail | claw 59A may become long corresponding to the wide raising area | region Aa2.

  As shown in FIGS. 2, 5, and 7 to 9, the cutting blade driving device 70 is disposed at the right end portion of the intermediate member 35 so as to be positioned at the right end of the cutting conveyance unit 3. As a result, there is an inconvenience that the harvested culm becomes entangled with the cutting blade driving device 70, which may be caused when the cutting blade driving device 70 is arranged on the left and right center side of the cutting conveyance unit 3, and the cutting blade driving device 70 is cut. An uncut crop Cx that has a high work frequency when there is an uncut crop Cx that exists only on the left outer side of the traveling vehicle body 1 and that may be incurred when deployed at the left end of the transport unit 3. Therefore, it is possible to avoid the occurrence of inconveniences that are entangled with the blade driving device 70.

  In addition, the supply and transport device 25 is arranged at a position on the left side in the harvesting and transporting unit 3 so as to supply and transport the cereal that has been scraped and transported to the cereal passing unit 27 toward the threshing device 4 on the left side of the vehicle body. By providing a relatively heavy cutting blade driving device 70 at the right end of the cutting and conveying unit 3 whose left side is heavy, the right and left balance of the cutting and conveying unit 3 can be improved.

  A sheet metal cover 111 that covers the cutting blade driving device 70 is provided at the right end of the cutting and conveying unit 3. The cover 111 uses the upper two bolts 112 among the three bolts 112 that connect the right weed member 21B to the right end of the intermediate member 35, and the right weed at the right end of the intermediate member 35. It is connected together with と と も に 99B.

  As a result, during the middle-distance work traveling in which the uncut crop Cy is also present on the right outer side of the traveling vehicle body 1, the uncut crop Cy on the right outer side of the vehicle body is cut by the right weed rod 99 </ b> B and the cover 111. The possibility of getting entangled with the drive device 70 can be avoided in advance.

  Further, as compared with the case where the right weed member 21B, the right weed rod 99B, and the cover 111 are individually bolted to the right end portion of the intermediate member 35, the assembly can be improved. Moreover, when exchanging the right weed ridge 99B and the cover 111, they can be exchanged while preventing the right weed member 21B from being completely removed from the right end of the intermediate member 35.

  As shown in FIGS. 2 to 4, the side frame 113 located at the front right side end of the traveling vehicle body 1 is inclined in the left-right direction of the vehicle body so that the front half side approaches the right end portion 13Ba of the crawler 13B on the right side toward the front end side. I'm allowed. As a result, during the middle-distance work traveling in which the uncut crop Cy is also present on the right outer side of the traveling vehicle body 1, the outer surface 113a of the side frame 113 is placed on the uncut crop Cy on the right outer side of the vehicle body. It can be made to function as a guide surface for guiding. As a result, the lodging of the uncut crop Cy existing on the right outer side of the traveling vehicle body 1 toward the vehicle inner side can be prevented together with the right weed 99B.

  By the way, in the left and right scraping and transporting devices 24A and 24B, the left and right scraping and transporting mechanisms 71A and 71B perform the scraping and transporting of the culm by the rubber scraping belts 74A and 74B, so In this case, the protrusions 74a and 74b of the take-up belts 74A and 74B are deformed by losing the strength of the culm before cutting, and until the culm is trimmed by this deformation, The rice cake is not scraped and conveyed toward the grain rice cake passage part 27. In addition, by the operation traveling at this time, the cereal before cutting is pushed and bent toward the front of the vehicle body.

  Then, when the cereals pushed and bent in this way reach the cutting position of the cutting device 23 and are cut, the restoring action is made to return to the straight state from the pushed and bent state along with the cutting. As a result, it may jump out to the front side of the vehicle body away from the left and right scraping and transporting mechanisms 71A and 71B, deviate from the transport area of the left and right scraping and transporting mechanisms 71A and 71B, and spill out in front of the reaping device 12.

  When such a phenomenon occurs, the grain spills spilled forward in front of the reaping device 12 are successively introduced to the transport areas of the left and right scraping transport mechanisms 71A and 71B as the work travels. The pestle is pushed back to the reaping position of the reaping device 12, and the stock side is reaped together with the unreached culms.

  When such cereals are cut twice, the culm lengths of the cereals become uneven, and due to this unevenness, the alignment on the tip side when conveying the cereal toward the threshing device 4 becomes worse. In the threshing process in the threshing apparatus 4, unhandled items are likely to occur, and as a result, the grain recovery efficiency is likely to be reduced.

  Therefore, as shown in FIGS. 8, 9, 13 and 14, in this combine, the left and right scratch conveying mechanisms 71A and 71B in the left and right scratch conveying devices 24A and 24B are connected to their linear conveying paths 114A, The inclination angles θa and θb in the lateral direction of the vehicle body with respect to the longitudinal direction of the vehicle body 114B are configured to be the same. In addition, the angle θA between the straight conveyance path 114A of the left-side scratch conveyance mechanism 71A and the straight conveyance path 114B of the right-side scratch conveyance mechanism 71B is equal to the straight conveyance path 114A of the left-side scratch conveyance mechanism 71A and the supply conveyance device. The postures of the left and right scraping transport mechanisms 71A and 71B and the supply transport device 25 are set so as to be larger than the sandwiching angle θB with the straight transport path 115 of the stock holding and transport mechanism 82 at 25.

  When the postures of the left and right scraping and conveying mechanisms 71A and 71B are set as described above, the plurality of movable blades 68 and the fixed blades 69 are arranged in a straight line in the left and right direction on the straight conveying paths 114A and 114B above the reaping device 23. Are arranged so that they are arranged in a row in a straight line, and the cutting positions of the movable blades 68 and the fixed blades 69 that are positioned in a straight line in the left-right direction are substantially along the cutting positions. Can be positioned at.

  Thereby, it is possible to effectively suppress the left and right scavenging and conveying devices 24A and 24B from acting on the culm before the cutting by the reaping device 23, and the left and right scavenging and conveying devices 24A and 24B before the reaping. The fall of the grain collection | recovery efficiency resulting from acting on a grain kernel can be suppressed effectively.

  In addition, the culm immediately after cutting by the reaping device 23 can be quickly scraped and conveyed toward the culm passing portion 27 by the left and right scraping and transporting devices 24A and 24B, and as a result, the left and right scraping and transporting device 24A. , 24B can improve the scraping and conveying efficiency of the cereal.

  As shown in FIGS. 8 and 13, in the left and right scraping and conveying devices 24 </ b> A and 24 </ b> B, the guide members 73 </ b> A and 73 </ b> B are provided with the left and right packers 72 </ b> A and 72 </ b> B corresponding to the left and right end portions of the cutting and conveying unit 3. Linear guide portions 73a and 73b extending toward the center of rotation are provided. Each linear guide part 73a, 73b is formed in the horizontal straight line shape orthogonal to the vehicle body front-back direction.

  Thereby, it is possible to prevent the straight guide portions 73a and 73b of the left and right guide members 73A and 73B from acting on the culm before cutting and pushing and bending the cereal toward the front of the vehicle body during work travel. it can. As a result, it is possible to avoid the possibility that the pushed and bent cereal is spilled to the front of the reaping device 12 and cut twice due to the restoring action from the pushed and bent state.

  As shown in FIGS. 3 and 14, the supply and transport device 25 has its transport posture set so that the transport start end portion 25 b overlaps the boarding operation unit 2 when viewed from the front of the vehicle body. As a result, the cutting and conveying section 3 has a two-frame, four-saw cutting specification, and the positions of the left weeding start end 21Aa of the left weeding member 21A and the left end 13Aa of the left crawler 13A in the left-right direction of the vehicle body match, and the right By configuring so that the weed starting end 21Ba of the weeding member 21B and the right end 13Ba of the right crawler 13B in the left-right direction of the vehicle body substantially coincide with each other, it is positioned at the left-right intermediate portion of the traveling vehicle body 1. With respect to the cereal passing part 27, the conveyance start end 25b of the supply and transport device 25 is positioned immediately after the cereal passing part 27 capable of directly receiving the cereal passing through the cereal passing part 27. Can be made.

  That is, the cutting and conveying unit 3 configured to have a two-frame four-cutting specification without equipping an auxiliary conveying device that relays the delivery of cereals between the left and right scratch conveying devices 24A and 24B and the supply and conveying device 25. Can be obtained.

  The boarding operation unit 2 forms a recess 2a that allows the transfer start end 25b of the supply transfer device 25 to enter the front end of the side panel 15 that overlaps with the transfer start end 25b of the supply transfer device 25 when viewed from the front of the vehicle body. is there.

  The supply conveyance device 25 has an inclination angle θc in the vehicle body left-right direction of the straight conveyance path 115 of the stock holding and conveying mechanism 82 with respect to the vehicle body longitudinal direction so that the conveyance start end portion 25b enters the recess 2a of the boarding operation unit 2, and The inclination angle θd of the linear conveyance path 116 of the tip locking conveyance mechanism 83 with respect to the longitudinal direction of the vehicle body in the lateral direction of the vehicle body is increased.

  Thereby, compared with the case where the recessed part 2a is not formed in the boarding operation part 2, the conveyance start end part side of the supply conveyance apparatus 25 can be brought close to the boarding operation part 2, and, thereby, the vehicle body front-back direction of the supply conveyance apparatus 25 is obtained. Can be shortened, and the overall length of the combine as a whole can be shortened.

  Further, the closer to the boarding operation unit 2 is, the closer to the transport start end side of the supply transport device 25, the operation lever 98 for adjusting the handling depth provided in the support frame 90 of the supply transport device 25 is also provided. As a result, the operation lever 98 for adjusting the handling depth from the boarding operation unit 2 becomes easier to operate.

  By the way, when the inclination angles θc and θd in the lateral direction of the vehicle body with respect to the longitudinal direction of the vehicle body of the supply conveyance device 25 are increased, the supply conveyance device 25 comes closer to the left-side scraping conveyance mechanism 71A. Therefore, there is a possibility that the stocker side of the cereals conveyed by the supply and transport device 25 comes into contact with the left-side scraping and conveying mechanism 71A, resulting in inconvenience that the conveying posture of the cereals is disturbed.

  Therefore, as shown in FIG. 1, FIG. 2, FIG. 5 to FIG. 7 and FIG. 9, in this combine, the left scraping transport mechanism 71A is disposed at a lower height than the right scraping transport mechanism 71B. It is. As a result, the stocker side of the corn straw conveyed by the supply conveyance device 25 can be prevented from coming into contact with the left feeding and conveying mechanism 71A, and the conveying posture of the corn straw can be prevented from being disturbed. The grain recovery rate is reduced such that the supply side of the cereals is transported toward the threshing device 4 by the feeding / conveying device 25, and the handling of the threshing process in the threshing device 4 is likely to occur. Can be prevented.

  Further, when the left side scraping / conveying mechanism 71A is configured for two lines and the inclination angles θc and θd of the supply / conveyance device 25 in the lateral direction of the vehicle body with respect to the longitudinal direction of the vehicle body are increased, the left pulling frame 26A is used for trimming. The cereals are transported in a substantially U shape by the left-handed scraping transport mechanism 71A and the supply transport device 25. For this reason, in the culm passing section 27, which is a transfer direction switching point of the culm that is conveyed in a substantially U shape, the stocker side of the culm tends to be greatly swung by centrifugal force.

  Therefore, as shown in FIGS. 1, 2, 6 to 10, and 13, in this combine, a front-rear connecting portion 35 </ b> A is interposed between the extension member 34 and the intermediate member 35, and the extension is performed. By separating the member 34 from the grain passer 27 to the rear side of the vehicle body, between the extending member 34 and the intermediate member 35, A wide delivery path 117 that allows passage on the stock market side is formed.

  As a result, even if the cereal stock side is greatly swung by the centrifugal force in the cereal passing portion 27, the stock side of the cereal is prevented from contacting the extending end of the extending member 34. Kernel recovery that can be performed, and the grain tip side of the cereal is not aligned properly due to the contact posture of the cereal that is caused by the contact, and unhandled residue is likely to occur in the threshing process in the threshing device 4 A decrease in rate can be prevented.

  Further, the extending member 34 is arranged so as to be located on the left end side of the cutting and conveying unit 3 with respect to the grain passing portion 27. Thereby, in the corn straw passage part 27, it can prevent more reliably that the stock source side of the corn straw greatly shaken by the centrifugal force contacts the extension end of extension member 34, and resulted from the contact A drop in the grain recovery rate can be prevented more reliably.

  Furthermore, the guide members 73A and 73B of the left and right scraping and conveying devices 24A and 24B are formed so as to guide the stock source side of the cereal passing through the cereal passing portion 27 toward the supply conveying device 25, and The guide end portion 73c of the left guide member 73A is fixed to the support member 36, and the guide end portion 73d of the right guide member 73A is fixed to the extending end portion of the extending member 34.

  As a result, even if the stock side of the cereal is greatly swung by the centrifugal force in the cereal passing portion 27, the turning can be effectively suppressed by the right guide member 73B, and the Can be quickly and reliably delivered to the stock holding and transporting mechanism 82 of the supply and transport device 25 by the left and right guide members 73A and 73B. As a result, it is possible to prevent the grain recovery rate from being reduced due to clogging of cereals due to poor delivery and the disturbance of the posture of conveying cereals due to poor delivery.

  As shown in FIGS. 6, 9, and 13, above the connecting portion 35 </ b> A, a support plate that receives and supports the lower end of the cereals delivered from the left and right scraping and conveying devices 24 </ b> A and 24 </ b> B to the supply and conveying device 25 from below. 118 is provided so as to extend from the extending end of the extending member 34 to the intermediate member 35.

  Thereby, it is possible to easily align the stock side of the cereals delivered from the left and right scraping and conveying devices 24A and 24B to the supply and conveying device 25. As a result, the tip side of the cereal grains comes to be aligned, and it is difficult for unhandled items to be generated in the threshing process in the threshing device 4, and the grain recovery rate can be improved.

  FIG. 19 is a left side view of the cutting and conveying unit 3 showing another form of the cutting and conveying unit 3, and FIG. 20 is a front view of the cutting and conveying unit 3 showing another form of the cutting and conveying unit 3. As shown in these drawings, the cutting and conveying unit 3 exchanges the left weeding member 21A, so that the drive type separating member 21A is disposed between the left weeding tool 51A at the left end and the left pulling device 22A. A grass device 119 can be equipped.

  As shown in FIGS. 5, 19, and 20, the weeding device 119 can be driven by power extracted from the input shaft 53 </ b> A of the left pulling device 22 </ b> A via the bevel gear type auxiliary transmission mechanism 120. And, by the rotation, the endless chain 123 turned over the driving sprocket 121 arranged at the upper part and the driven sprocket 122 arranged at the lower part is rotated, so that the endless chain 123 is arranged and arranged at a constant pitch. The plurality of raising claws 124 separate the leftmost crop Ca within the work width of the cutting and conveying unit 3 and the crop Cx outside the left work width adjacent to the crop Ca.

  That is, by installing the drive type weeding device 119 between the left weeding tool 51A and the left pulling device 22A, the leftmost crop Ca within the working width of the cutting and conveying unit 3 and the adjacent crop Ca. It is possible to improve the weeding accuracy and weeding efficiency with the crop Cx outside the working width on the left side. This effect is particularly prominent when the harvesting operation is performed in a field where the crop C is heavily laid down.

The weeding device 119 is equipped with an inclined posture that inclines toward the inside of the vehicle body in the lateral direction of the vehicle body. Thereby, while separating the leftmost crop Ca within the work width of the cutting and conveying unit 3 and the crop Cx outside the left work width adjacent to the crop Ca, the tip side of the leftmost crop Ca within the work width is The left pulling device 22A can be pulled toward the raising area Aa2 .

  Thereby, the raising accuracy and the raising efficiency of the crop C by the pulling device 22A on the left side can be improved. This effect is particularly prominent when the left pulling device 22A causes two crops C.

    [Another embodiment]

[1] The cutting and conveying unit 3 may be a two-frame three-cutting specification in which the pulling frame (26B) on the boarding operation unit side is configured for one.

[2] The cutting and conveying unit 3 may be connected to the right side of the traveling vehicle body 1, and the boarding operation unit 2 may be formed on the left side of the traveling vehicle body 1.

[3] The supply / conveying device 25 receives the crop cereal delivery position to the sandwiching and conveying mechanism 31 of the threshing device 4 by the swinging operation in the left-right direction with the conveying start end 25b as a fulcrum. It may be configured to adjust the handling depth by changing.

[4] The tip sensor 95 may be configured to be mounted on the threshing device 4.

[5] Various changes can be made to the configuration of the adjusting means 87. For example, a hydraulic cylinder or the like may be employed instead of the electric motor 91.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 2 Boarding operation part 2a Concave part 3 Cutting and conveying part 4 Threshing device 21A Weeding member 21B Weeding member 21C Weeding member 22A Pulling device 22B Pulling device 23 Cutting device 24A Stake conveying device 24B Scratch conveying device 25 Supply conveying Device 25b Conveying start end portion 26A Pulling frame 26B Pulling frame 27 Grain passing portion 87 Adjusting means 95 Tip sensor 97A Control means 98 Operation lever C Crop θc Tilt angle of feeding and feeding device θd Tilt angle of feeding and feeding device

Claims (5)

A cutting and conveying section connected to one of the left and right sides of the traveling vehicle body ;
A boarding operation part provided on the other side of the traveling vehicle body ;
A threshing device provided at a position behind the cutting and conveying unit in the traveling vehicle body ,
A scraping and transporting device that scrapes and transports the cereals harvested by the reaping device of the scouring and transporting unit to the scouring and transporting unit, and a supply and transporting device that transports the stalks transported by the scavenging and transporting device to the threshing device And
The feeding and conveying device includes a conveying terminal portion of the feeding and conveying device so that the handling depth can be adjusted to change the feeding length to the threshing device on the tip side of the cereal that is threshed by the threshing device. It is configured to be able to swing up and down as a fulcrum
The cutting and conveying unit is provided with a guide rod that swings and guides the conveyance start end portion of the supply and conveyance device in the vertical direction while suppressing the lateral movement of the supply and conveyance device.
A recess for allowing the transfer start end and the guide rod to enter is formed at a front end of the boarding operation portion on the supply transfer device side, and the transfer start end and the guide rod in the vehicle body front view. Is configured to overlap with the boarding operation unit. A bracket having a through hole is attached to the conveyance start end,
The combine according to claim 1, wherein the guide rod is inserted into the through-hole to swing and guide the conveyance start end portion in the vertical direction while suppressing a lateral movement of the supply and conveyance device. The combine according to claim 2, wherein the bracket is attached to the conveyance start end portion in a state of extending toward the front. The combine according to claim 2 or 3, wherein the bracket is attached to the conveyance start end portion so that the through hole is located closer to the boarding operation portion than the conveyance start end portion. A stock holding and transporting mechanism for holding and transporting the stock source side of the grain straw to the supply transporting device, and a tip associated with and transporting the stock tip holding side of the grain straw, which is provided above the stock holding and transporting mechanism. A stop conveyance mechanism,
The combine according to any one of claims 2 to 4, wherein the bracket is attached to the tip locking and conveying mechanism.