JP2013153656A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester that prevents left-unreaped of a second reaping blade 133 in spite of constituting a second reaping blade support frame structure at a low cost.SOLUTION: A combine harvester is equipped with a reaping device 3 provided with a first reaping blade 15, a threshing device 9 having a threshing cylinder 21, a traveling machine 1 provided with an engine 7 and an operating seat 42, a second reaping blade 133 for cutting remaining stocks of the first reaping blade 15 and a second reaping blade drive mechanism 171 for transmitting driving force to the second reaping blade 133; adjusts cut stock height of a field by the second reaping blade 133; further is equipped with a left frame 134, a right frame 135 and a central frame 136 as a second reaping blade frame supporting the second reaping blade 133; and has a structure in which the second reaping blade 133 is mounted through the frames 134, 135 and 136 on the traveling machine 1 and the left frame 134, wherein the right frame 135 and the central frame 136 are formed approximately in the same shape and size.

Description

  The present invention relates to a combine equipped with a reaping device for reaping uncut cereal grains in a field and a threshing apparatus for threshing grains of the harvested cereal grains.

  Conventionally, a traveling machine body having a traveling unit and a driver seat, a reaping device having a first cutting blade, a threshing device having a handling cylinder, a feeder house for supplying reaped cereals from the reaping device to the threshing device, and driving each part A second cutting blade that cuts off the remaining stock of the first cutting blade and continuously cuts off the uncut rice cereals in the field and includes a grain sorting mechanism that sorts the threshing material of the threshing device. And adjusting the stump height of the farm field with the second cutting blade to reduce the stump height remaining in the farm field (Patent Documents 1 to 3).

No. 7-50901 JP 2011-36210 A JP 2011-200188 A

  In the prior art shown in Patent Literature 1 to Patent Literature 3, since the second cutting blade frame provided with the second cutting blade is connected to the reaping device having the first cutting blade so as to be movable up and down, the second cutting blade In the conventional structure in which the base end side of the second cutting blade frame is rotatably supported on the left front part of the traveling machine body, the left front part of the traveling machine body is located in front of the threshing device. It is necessary to prevent the uncut mower on the left side of the traveling machine body from coming into contact with the front part of the traveling machine body. For example, there is a problem that the second cutting blade frame cannot be easily assembled to the traveling machine structure that is not equipped with the second cutting blade by post-processing. Moreover, in the conventional structure which drives a 2nd cutting blade by spanning a drive chain or a belt from the cutting input shaft of the front part of a threshing device to the base end side of the 2nd cutting blade frame, the 2nd cutting blade frame is connected. It is necessary to configure the front part of the traveling machine body to be highly rigid, and the support structure for the second cutting blade cannot be simplified or reduced in cost. For example, there is a problem that the drive structure of the second cutting blade cannot be easily assembled to the drive structure of the reaping device not equipped with the second cutting blade by post-processing. That is, there is a problem that the structure in which the second cutting blade is not mounted and the structure in which the second cutting blade is mounted cannot be easily configured with a traveling machine body of the same specification.

  Therefore, the present invention seeks to provide a general combine that has been improved by examining these current conditions.

  In order to achieve the object, a combine of an invention according to claim 1 includes a cutting device provided with a first cutting blade, a threshing device having a handling cylinder, a traveling machine body provided with an engine and a driving seat, and a first cutting blade. In a combine that includes a second cutting blade that cuts the remaining stock, and a second cutting blade drive mechanism that transmits a driving force to the second cutting blade, and adjusts the height of the stump in the field with the second cutting blade, The left cutting frame includes a left frame, a right frame, and a central frame as a second cutting blade frame that supports the second cutting blade, and the second cutting blade is attached to the traveling machine body through the frames. The right frame and the center frame are formed to have substantially the same shape and size.

  According to a second aspect of the present invention, in the combine according to the first aspect, a forward / reverse switching case is provided on a cutting input shaft for transmitting a driving force to the cutting device, and the forward / reverse switching is performed via a hollow frame and a gear case. The left frame is connected to the case.

  According to a third aspect of the present invention, in the combine according to the first aspect, a second cutting blade drive shaft that transmits a driving force to the second cutting blade and a hollow frame that interpolates the second cutting blade drive shaft. A second cutting blade drive shaft and a hollow frame are provided on the outer side of the feeder house away from the driver seat, the left frame is connected to the hollow frame via a bevel gear case, and the hollow frame is connected to the traveling machine body. The left frame is connected via

  According to a fourth aspect of the present invention, in the combine according to the first aspect, the central frame is formed by a square pipe, a leaf spring body is provided between the traveling machine body and the lower surface of the central frame, and the leaf spring is provided. The body is configured to repress the second cutting blade in the upward direction.

  According to the first aspect of the present invention, the reaping device provided with the first cutting blade, the threshing device having the handling drum, the traveling machine body provided with the engine and the driver seat, and the first cutting blade remaining stock. A second cutting blade, and a second cutting blade drive mechanism that transmits a driving force to the second cutting blade, and the second cutting blade supports the second cutting blade in a combine that adjusts the stub height of a field. The second cutting blade frame includes a left frame, a right frame, and a central frame, and the second cutting blade is attached to the traveling machine body through the frames. The left frame, the right frame, and the central frame Since the steel frame is formed in substantially the same shape and dimensions, the left frame, the right frame, and the center frame can be formed by cutting the steel pipe into the same length, and the second cutting blade support frame structure is configured at low cost. it can. By extending the left frame and the right frame linearly forward, the left and right cutting widths of the second cutting blade can be secured to the same cutting width as the first cutting blade, for example, meandering during the cutting operation. However, it is possible to easily prevent the second cutting blade from cutting off the residue (long stump) in the field after the tip side is cut by the first cutting blade.

  According to the second aspect of the present invention, the forward / reverse switching case is provided on the cutting input shaft for transmitting the driving force to the cutting device, and the left frame is connected to the forward / reverse switching case via the hollow frame and the gear case. Therefore, by connecting the hollow frame and the gear case, the distance between the second cutting blade support part on the one end side of the left frame and the machine mounting part on the other end side of the left frame can be extended rearward. That is, the second cutting blade support part length (front-rear length) on the left frame side as the second cutting blade frame can be formed long in the rear side, and the machine support part of the left frame can be arranged at a high position. . For example, it is not necessary to project the left side portion of the traveling machine body forward, compared to a structure in which the left frame support unit is disposed at substantially the same height as the upper surface of the traveling machine body. Problems such as the left uncut cereals coming into contact with the grain and coming off can be eliminated.

  According to a third aspect of the present invention, the second cutting blade drive shaft that transmits a driving force to the second cutting blade and a hollow frame that interpolates the second cutting blade drive shaft are provided, and separated from the driver seat. A second cutting blade drive shaft and a hollow frame are provided on the machine outer side of the feeder house, the left frame is connected to the hollow frame via a bevel gear case, and the left frame is connected to the traveling machine body via a hollow frame. Since it is connected, the second cutting blade drive shaft and the hollow frame can be used as a second cutting blade support member for supporting the second cutting blade, and the left frame is positioned at a high position of the traveling machine body. The base end can be supported. Since the structure of the front lower part on the left side of the traveling machine body can be simplified, it is possible to prevent the uncut cereals on the outside of the machine from coming into contact with the left side of the traveling machine body. While the second cutting blade drive shaft and the hollow frame can be combined to reduce the weight of the second cutting blade support structure, the second cutting blade drive shaft and the hollow frame enhance the second cutting blade support structure. Can be configured to be rigid.

  According to a fourth aspect of the present invention, the central frame is formed by a square pipe, a leaf spring body is provided between the traveling machine body and the lower surface of the center frame, and the second cutting blade is formed by the leaf spring body. The other end side of the leaf spring body is fixed to the traveling machine body side so that the one end side of the leaf spring body is resiliently pressed to the lower surface side of the central frame. With a simple connection structure, the leaf spring body can be assembled between the traveling machine body and the central frame. Note that the elastic deformation of the leaf spring body allows the mud soil adhering to the upper surface of the leaf spring body to be easily removed, and the elastic deformation function of the leaf spring body can be maintained. Further, the height of the second cutting blade with respect to the first cutting blade can be changed by a simple adjustment operation while maintaining the height of the second cutting blade with respect to the main unit at a certain height or more with the leaf spring body.

It is a left view of the combine which shows 1st Embodiment of this invention. It is a right view of the combine. It is a top view of the combine. It is a perspective view of the threshing device front part and the 2nd cutting blade part seen from diagonally forward. It is a drive system figure of the combine. It is a perspective view of the traveling machine body front part and the 2nd cutting blade seen from diagonally forward. It is the perspective view of the 2nd cutting blade seen from diagonally forward. It is a partial expanded explanatory view of the support height adjustment part of the 2nd cutting blade. It is the elements on larger scale of FIG. It is a drive system figure of a reaping device part. It is a drive system figure of the reaping device part which shows a 2nd embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described based on the drawings (FIGS. 1 to 5) applied to an ordinary combine. 1 is a left side view of the combine, FIG. 2 is a right side view thereof, FIG. 3 is a plan view thereof, FIG. 4 is a left perspective view thereof, and FIG. First, the schematic structure of the combine will be described with reference to FIGS. In the following description, the left side in the forward direction of the traveling machine body 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side.

  As shown in FIGS. 1 to 5, the ordinary combine in the embodiment includes a traveling machine body 1 supported by a pair of left and right crawler belts 2 made of rubber crawlers as a traveling portion. At the front part of the traveling machine body 1, a reaping device 3 for capturing uncut cereal grains such as rice (or wheat, soybeans or corn) is mounted by a single-acting lifting / lowering hydraulic cylinder 4 so as to be adjustable up and down. ing.

  On the left side of the traveling machine body 1, a threshing device 9 for threshing the harvested cereal meal supplied from the reaping device 3 is mounted. In the lower part of the threshing device 9, a grain sorting mechanism 10 for performing swing sorting and wind sorting is arranged. A driver's cab 5 on which an operator is boarded is mounted on the front right side of the traveling machine body 1. An engine 7 as a power source is disposed on the cab 5 (below the driver seat 42). Behind the cab 5 (on the right side of the traveling machine body 1), a grain tank 6 for taking the grain from the threshing device 9 and a grain for discharging the grain in the grain tank 6 toward the truck bed (or container, etc.) A discharge conveyor 8 is arranged. The grain discharge conveyor 8 is tilted toward the outside of the machine so that the grains in the grain tank 6 are carried out by the grain discharge conveyor 8.

  The reaping device 3 includes a feeder house 11 that communicates with a handling port 9 a in the front part of the threshing device 9, and a horizontally long bucket-like grain header 12 that is provided continuously at the front end of the feeder house 11. A scraping auger 13 (platform auger) is rotatably supported in the grain header 12. A take-up reel 14 with a tine bar is disposed above the front portion of the take-up auger 13. A clipper-shaped first cutting blade 15 is disposed in front of the grain header 12. Left and right weed bodies 16 are provided to project from the left and right sides of the front part of the grain header 12. In addition, a supply conveyor 17 is installed in the feeder house 11. A beater-feeding beater 18 (front rotor) is provided on the feed end side (handle 9a) of the supply conveyor 17. The lower surface portion of the feeder house 11 and the front end portion of the traveling machine body 1 are connected via the lifting hydraulic cylinder 4, and the cutting device 3 moves up and down using a cutting input shaft 89 (feeder house conveyor shaft) described later as a lifting fulcrum. The hydraulic cylinder 4 is moved up and down.

  With the above configuration, the tip side of the uncut grain culm between the left and right weed bodies 16 is scraped by the scraping reel 14, and the scissor side of the uncut grain culm is cut by the first cutting blade 15. As a result of the rotational drive, the harvested cereal grains are collected near the entrance of the feeder house 11 near the center of the left and right width of the grain header 12. The whole amount of the harvested cereal meal of the grain header 12 is conveyed by the supply conveyor 17 and is configured to be input to the handling port 9 a of the threshing device 9 by the beater 18. The grain header 12 is provided with a horizontal control hydraulic cylinder (not shown) that rotates about the horizontal control fulcrum shaft, and the grain header 12 is adjusted by the horizontal control hydraulic cylinder to adjust the horizontal inclination of the grain header 12. 12 and the first cutting blade 15 and the take-up reel 14 can be supported horizontally with respect to the field scene.

  Moreover, as shown in FIG. 1, FIG. 3, the handling cylinder 21 is rotatably provided in the handling chamber of the threshing apparatus 9. As shown in FIG. A handling cylinder 21 is pivotally supported on a handling cylinder shaft 20 extended in the front-rear direction of the traveling machine body 1. On the lower side of the handling cylinder 21, a receiving net 24 for allowing the grains to leak is stretched. In addition, a spiral screw blade-shaped intake blade 25 projects outward in the radial direction on the outer peripheral surface of the front portion of the handling cylinder 21.

  With the above-described configuration, the harvested cereal mash introduced from the handling port 9a by the beater 18 is conveyed toward the rear of the traveling machine body 1 by the rotation of the handling cylinder 21 and is, for example, between the handling cylinder 21 and the receiving net 24. Kneaded and threshed. The threshing of grains or the like smaller than the mesh of the receiving net 24 leaks from the receiving net 24. The sawdust and the like that do not leak from the receiving net 24 are discharged from the dust outlet 23 at the rear of the threshing device 9 to the field by the conveying action of the barrel 21.

  A plurality of dust feed valves (not shown) for adjusting the conveying speed of shed grains in the handling chamber are pivotally mounted on the upper side of the handling cylinder 21 so as to be rotatable. By adjusting the angle of the dust feed valve, the conveying speed (residence time) of threshing in the handling chamber can be adjusted according to the variety and properties of the harvested cereal. On the other hand, the grain sorting mechanism 10 disposed below the threshing device 9 includes a rocking sorter 26 for specific gravity sorting having a grain pan, a chaff sheave, a grain sheave, a Strollac, and the like.

  In addition, the grain sorting mechanism 10 includes a tang fan 29 that supplies sorting wind to the swing sorter 26. The threshing that has been threshed by the handling cylinder 21 and leaked from the receiving net 24 is caused by the specific gravity sorting action of the rocking sorter 26 and the wind sorting action of the Kara fan 29, and the grain (the most important thing such as a refined grain). In addition, it is configured so as to be selected and extracted into a mixture of grain and straw (second product such as grain with branch stems), and sawdust.

  A first conveyor mechanism 30 and a second conveyor mechanism 31 are provided on the lower side of the swing sorter 26 as the grain sorting mechanism 10. The grain (first thing) dropped from the swing sorter 26 by the sorting of the swing sorter 26 and the tang fan 29 is collected in the glen tank 6 by the first conveyor mechanism 30 and the cereal conveyor 32. The mixture of grains and straw (second product) is returned to the sorting start end side of the swing sorting plate 26 through the second conveyor mechanism 31 and the second reduction conveyor 33 and is re-sorted by the swing sorting plate 26. The The sawdust and the like are configured to be discharged from the dust outlet 23 at the rear of the traveling machine body 1 to the field.

  Further, as shown in FIGS. 1 to 3, the cab 5 is provided with a control column 41 and a driver seat 42 on which an operator sits. The steering column 41 includes a control lever 43 that changes the path of the traveling machine body 1, a main transmission lever 44 and a sub-transmission lever 45 that switch the moving speed of the traveling machine body 1, and a cutting clutch lever that drives or stops the cutting device 3. 46 and a threshing clutch lever 47 for driving or stopping the threshing device 9 are arranged. Further, a roof 49 for awning is attached to the upper side of the cab 5 via a sun visor support 48.

  As shown in FIGS. 1 and 2, left and right track frames 50 are arranged on the lower surface side of the traveling machine body 1. The track frame 50 includes a drive sprocket 51 that transmits the power of the engine 7 to the crawler belt 2, a tension roller 52 that maintains the tension of the crawler belt 2, a plurality of track rollers 53 that hold the ground side of the crawler belt 2 in a grounded state, An intermediate roller 54 that holds the non-grounding side of the crawler belt 2 is provided. The front side of the crawler belt 2 is supported by the drive sprocket 51, the rear side of the crawler belt 2 is supported by the tension roller 23, the ground side of the crawler belt 2 is supported by the track roller 53, and the non-grounded side of the crawler belt 2 is supported by the intermediate roller 54. Configure to support.

  Next, the drive structure of the combine will be described with reference to FIGS. As shown in FIG. 5, a transmission continuously variable transmission 64 having a traveling hydraulic pump and a hydraulic motor (not shown) is provided in the mission case 63. The engine 7 is mounted on the upper right side of the front part of the traveling machine body 1, and the mission case 63 is arranged on the front part of the traveling machine body 1 on the left side of the engine 7. Further, an output shaft 65 projecting leftward from the engine 7 and an input shaft 66 projecting leftward from the mission case 63 are connected via an engine output belt 67. A charge pump 68 that drives the lifting hydraulic cylinder 4 and the like and a cooling fan 69 are arranged in the engine 7, and the charge pump 68 and the cooling fan 69 are driven by the engine 7.

  Further, a handling cylinder drive case 71 that pivotally supports the front end side of the handling cylinder shaft 20 is provided. A barrel driving case 71 is provided on the front wall of the threshing device 9. A counter shaft 72 for driving the reaping device 3 and the handling cylinder 21 is pivotally supported on a handling cylinder drive case 71. A tang input pulley 83 is provided at the right end of the tang shaft 76 that supports the tang fan 29. A tang input pulley 83 at the right end of the tang shaft 76 is connected to the output shaft 65 of the engine 7 through a threshing clutch 84 that also serves as a tension roller and a threshing drive belt 85. That is, the red shaft 76 is connected to the output shaft 65 of the engine 7 via the threshing drive belt 85. Then, a barrel driving pulley 86 is provided at the left end portion of the rod shaft 76 on the side away from the engine 7.

  Further, a counter input pulley 88 is disposed at the left end portion of the counter shaft 72 on the side away from the engine 7. A counter input pulley 88 at the left end of the counter shaft 72 is connected to the barrel driving pulley 86 via a tension-type barrel driving belt 87. A front end side of the barrel cylinder 20 is connected to a right end portion of a counter shaft 72 extending in the left-right direction via a bevel gear mechanism 75. The engine 7 is configured to transmit power from the engine shaft 7 to the front end side of the handling cylinder shaft 20 via the counter shaft 72 and to rotate the handling cylinder 21 in one direction.

  That is, the threshing clutch 84 is controlled to be turned on and off by the operation of the threshing clutch lever 47 by the operator. When the threshing clutch 84 is turned on, the handling cylinder 21 is driven via the counter shaft 72, and the cereals thrown in from the beater 18 are continuously threshed by the handling cylinder 21.

  Furthermore, the left end of the Karatsu shaft 76 is connected to the left end of the first conveyor shaft 77 of the first conveyor mechanism 30 and the left end of the second conveyor shaft 78 of the second conveyor mechanism 31 via the conveyor drive belt 111. The parts are connected. The left end portion of the second conveyor shaft 78 is connected to the left end portion of the crank-shaped swing drive shaft 79 pivotally supported by the rear portion of the swing sorting plate 26 via the swing sorting belt 112. The cereal conveyor 32 is driven via the first conveyor shaft 77, and the first selected grain of the first conveyor mechanism 30 is collected in the glen tank 6. The second reduction conveyor 33 is driven via the second conveyor shaft 78, and the second selected grain (second product) mixed with the sawdust from the second conveyor mechanism 31 is moved to the upper side of the swing sorter 26. Returned to

  On the other hand, a beater shaft 82 that pivotally supports the beater 18 is provided. The left end portion of the beater shaft 82 is connected to the left end portion of the counter shaft 72 via the cutting drive belt 114 and the cutting clutch 115 (tension pulley). A cutting input shaft 89 is provided as a conveyor input shaft that pivotally supports the feed terminal side of the supply conveyor 17. A forward / reverse switching case 121 (bearing means for the cutting input shaft 89) is provided on the left end of the cutting input shaft 89. While inserting the left end of the cutting input shaft 89 into the forward / reverse switching case 121, the forward / reverse transmission shaft 122 and the forward / reverse switching shaft 123 are provided in the forward / reverse switching case 121. The cutting input shaft 89 and the forward / reverse transmission shaft 122 are arranged on substantially the same axis. Further, the left end portion of the forward / reverse transmission shaft 122 is connected to the beater shaft 82 via a cutting drive chain 116 and sprockets 117 and 118.

  As shown in FIG. 5, a header drive shaft 91 is provided on the grain header 12. The right end of the cutting input shaft 89 is connected to the header drive shaft 91 via the header drive chain 90. A scraping shaft 93 that pivotally supports the scraping auger 13 is provided. A header drive shaft 91 is coupled to the drive shaft 93 via a drive drive chain 92.

  A reel shaft 94 that pivotally supports the take-up reel 14 is also provided. A header drive shaft 91 is connected to the reel shaft 94 via an intermediate shaft 95 and reel drive chains 96 and 97. The first cutting blade 15 is connected to the right end portion of the header drive shaft 91 via a first cutting blade drive crank mechanism 98. By the turning-on / off operation of the cutting clutch 242, the feed conveyor 17, the auger 13, the take-up reel 14, and the first cutting blade 15 are driven and controlled, and the tip side of the uncut grain culm in the field is continuously cut. It is configured to take.

  As shown in FIG. 5, the forward rotation bevel gear 124 integrally formed with the forward / reverse transmission shaft 122, the reverse rotation bevel gear 125 rotatably supported on the cutting input shaft 89, and the reverse rotation bevel gear 125 are connected to the forward rotation bevel gear 124. An intermediate bevel gear 126 is installed in the forward / reverse switching case 121. The intermediate bevel gear 126 is always meshed with the forward bevel gear 124 and the reverse bevel gear 125. On the other hand, the slider 127 is slidably supported on the cutting input shaft 89 by a spline engagement shaft. The slider 127 is configured to be detachably engageable with the forward rotation bevel gear 124 via the claw clutch-shaped forward rotation clutch 128, and the slider 127 is engaged with the reverse rotation bevel gear 125 via the claw clutch-shaped reverse rotation clutch 129. It is configured to be detachably engageable.

  In addition, a forward / reverse switching shaft 123 for sliding the slider 127 is provided. A forward / reverse switching arm 130 is provided on the forward / reverse switching shaft 123, and the forward / reverse switching arm 130 is swung to rotate the forward / reverse switching shaft 123. Then, the slider 127 is brought into contact with and separated from the forward rotation bevel gear 124 or the reverse rotation bevel gear 125, and the slider 127 is selectively locked to the forward rotation bevel gear 124 or the reverse rotation bevel gear 125 via the forward rotation clutch 128 or the reverse rotation clutch 129. The cutting input shaft 89 is configured to be forwardly or reversely connected to the forward / reverse transmission shaft 122.

  Further, as shown in FIGS. 4, 6, and 7, left and right mowing columns 211 are erected on the traveling machine body 1 in front of the threshing device 9. Both ends of the cutting input shaft 89 are rotatably supported by the left and right cutting posts 211 via the left and right cutting bearing bodies 212. The cutting bearing body 212 is bolted to the cutting column 211. A forward / reverse switching case 121 is bolted to the left mowing post 211.

  A rear end portion of the feeder house 11 is rotatably supported by the left and right cutting posts 211 via a cutting input shaft 89. The entire cutting device 3 is supported by the cutting input shaft 89 through the feeder house 11 so as to be movable up and down. Note that the beater 18 is pivotally supported via a beater shaft 82 between the left and right mowing columns 211.

  A forward / reverse switching lever (not shown) as a forward / reverse switching operation tool is connected to a forward / reverse switching arm 130 for switching the slider 127 via an operating rod (not shown). The forward / reverse switching lever is rotatably supported on the right side surface of the right mowing post 211 via a bracket body for lever support. The forward / reverse switching lever is disposed between the right mowing post 211 and the cab 5. An operator who sits on the driver's seat 42 can switch the forward / reverse switching lever with his left hand.

  With the above configuration, the operator operates the forward / reverse switching lever to engage the slider 127 with the forward rotation bevel gear 124 via the forward rotation clutch 128, and forwardly connect the cutting input shaft 89 to the forward / reverse transmission shaft 122. In this state, the operator operates the threshing device 9 by operating the threshing clutch 84 and operates the reaping device 3 by operating the chopping clutch 115 to thresh while continuously harvesting the grain culm in the field. The grain is collected in the Glen tank 6.

  On the other hand, during the harvesting operation, when the harvested cereals are stuck in the feeder house 11 or the beater 18 and the like, the operator first operates the forward / reverse switching lever and the reverse bevel gear 125 via the reverse clutch 129. With the slider 127 engaged and the cutting input shaft 89 connected in reverse to the forward / reverse transmission shaft 122, the threshing clutch 84 and the cutting clutch 115 are engaged to operate the feed conveyor 17 (the cutting device 3) in reverse. The cereals packed in the feeder house 11 and the like are moved back to the grain header 12 side, and the cereals packed in the feeder house 11 and the like are taken out from the grain header 12 side to the outside.

  Further, as shown in FIG. 5, the right end portion of the auger drive shaft 58 is connected to the output shaft 65 of the engine 7 via the auger clutch 56 and the auger drive belt 57 in the form of a tension pulley. The front end side of the lateral feed auger 60 at the bottom of the Glen tank 6 is connected to the left end portion of the auger drive shaft 58 via a bevel gear mechanism 59. A vertical feed auger 62 of the grain discharge conveyor 8 is connected to the rear end side of the horizontal feed auger 60 via a bevel gear mechanism 61.

  Further, a grain discharge lever 55 for turning on and off the auger clutch 56 is provided. The operation part of the grain discharge lever 55 protrudes to the right outer side of the front surface of the grain tank 6 so that the operator can operate the grain discharge lever 55 from the field on the driver seat 42 side or the right outer surface of the grain tank 6.

  Next, with reference to FIGS. 4-10, the attachment structure and drive structure of a 2nd cutting blade are demonstrated. As shown in FIGS. 6 and 7, a clipper-shaped second cutting blade 133 having substantially the same length as the clipper-shaped first cutting blade is provided. In addition, a left frame 134, a right frame 135, and a center frame 136 are provided as second cutting blade frames for mounting the second cutting blade 133 on the traveling machine body 1. The left frame 134, the right frame 135, and the center frame 136 are formed of rectangular steel pipes having substantially the same shape and size. A second cutting blade base 137 is fixed to the front end side of the left frame 134, the right frame 135, and the center frame 136. Left and right grounding housings 138 are provided at both ends of the second cutting blade base 137. The 2nd cutting blade 133 is attached between the left and right grounding housings 138 of the 2nd cutting blade base 137 so that reciprocation is possible.

  On the other hand, the right bearing body 139 is detachably fastened to the right side of the cab frame 1a of the traveling machine body 1, and the base end side of the right frame 135 is rotatably supported by the right bearing body 139. Further, the support frame body 140 is detachably fastened to the central portion of the left and right widths of the front frame 1b of the traveling machine body 1 so that the support frame body 140 protrudes forward from the front side part of the traveling machine body 1. A central bearing body 141 is detachably fastened to a front end portion of the support frame body 140, and a base end side of the central frame 136 is rotatably supported by the central bearing body 141.

  In addition, bearing frames 142 for the left and right drive sprockets 51 are provided in front portions of the left and right track frames 50. The left and right bearing frames 142 are integrally connected by the front lower frame 1c of the traveling machine body 1, and the spring seat bracket 143 is fixed to the center of the left and right widths of the front lower frame 1c. The spring seat bracket 143 is provided with a leaf spring elastic arm body 144 as a lifting support, and one end side of the elastic arm body 144 is fastened to the spring seat bracket 143. On the other hand, the other end side of the elastic arm body 144 extends from the front lower frame 1c toward the front, and the other end side of the elastic arm body 144 from the lower side to the middle lower surface side of the central frame 136 extended in the front-rear direction. Press. Then, the central frame 136 is set so that the support load of the second cutting blade mechanism 145 including the left frame 134, the right frame 135, the central frame 136, and the second cutting blade 133 substantially coincides with the lifting elastic force of the elastic arm body 144. The elastic pressure of the elastic arm body 144 with respect to is set.

  Furthermore, a second cutting blade height adjusting mechanism 150 is provided between the feeder house 11 and the central frame 136. The second cutting blade height adjustment mechanism 150 includes a vertically movable rectangular lifting frame 151 and a lifting and lowering frame 152 that can be expanded and contracted. An upper end side of the lifting / lowering frame 151 is slidably inserted into the hollow portion of the lifting / lowering frame 152 from below. A lower shaft body 153 is fixed to the middle upper surface side of the center frame 136. A lower shaft 153 is rotatably connected to the lower end side of the elevating / lowering frame 151. On the other hand, a reinforcing frame 154 is fixed to the upper surface side of the feeder house 11. One end side of the upper shaft body 155 is rotatably connected to the reinforcing frame 154, and the other end side of the upper shaft body 155 is fixed to the side surface of the elevating upper frame 152.

  In addition, an engagement / disengagement operation mechanism 161 that connects the elevating / lowering frame 151 and the elevating / lowering frame 152 is provided. A lower engaging groove 162 and a plurality of upper engaging grooves 163 are formed in a substantially vertical line on the upper end side of the elevating and lowering frame 151. An engagement / disengagement operation mechanism 161 is provided on the lifting / lowering frame 152. The engagement / disengagement operation mechanism 161 includes an engagement pin 164 that engages the distal end side selectively in one of the engagement grooves 162 and 163, and the engagement pin 164 is moved to the engagement groove 162 or 163. A holding spring 165 for engaging and holding, a casing 166 for interposing and supporting the intermediate portion of the engaging pin 164 and the holding spring 165, and a pivotally supported via a fulcrum shaft 167 at the base end portion of the engaging pin 164. And an engagement / disengagement operation lever 169 that is fixed to the insertion / removal cam body 168.

  A casing 166 is fixed to the outer side surface of the elevating and lowering frame 152, and the side surface of the elevating and lowering frame 151 in which the engaging grooves 162 and 163 are formed is configured to face the distal end side of the engaging pin 164. The inner diameter dimension of the circular hole-shaped upper engagement groove 163 and the outer diameter dimension of the cylindrical engagement pin 164 are formed to be substantially the same dimension. That is, the second cutting blade mechanism 145 is connected to the feeder house 11 via the lifting / lowering frame 151 and the lifting / lowering frame 152 so that the height can be adjusted. Engaging the engaging pin 164 into one of the plurality of upper engaging grooves 163, and adjusting the relative support height of the second cutting blade 133 with respect to the cutting device 3 (first cutting blade 15) in a multistage manner, It is configured to adjust the stump height remaining in the field.

  Compared to the inner diameter dimension of the upper engagement groove 163 or the outer diameter dimension of the engagement pin 164, the upper and lower inner diameter width dimension of the lower engagement groove 162 in the shape of a vertically long hole is formed longer. With the engagement pin 164 engaged with the lower engagement groove 162, the engagement pin 164 moves up and down with respect to the elevation frame 152 (feeder house 11) within the range in which the engagement pin 164 moves up and down in the lower engagement groove 162. The lower frame 151 (second cutting blade 133) is configured to move up and down. That is, when the cutting pin 164 is engaged with the lower engaging groove 162 and the cutting operation is executed, the grounding frame 138 is landed on the field scene, and the height of the cutting device 3 with respect to the main unit is maintained constant. In this state, the grounding housing 138 (second cutting blade 133) moves up and down following the unevenness of the farm scene, and the stub height remaining in the farm field is maintained substantially constant.

  In addition, in the state where the height of the cutting device 3 with respect to the main unit is kept constant, the height of the cutting device 3 with respect to ground changes due to the unevenness of the farm scene, and the chopping height of the first cutting blade 15 changes. . Further, even if the height of the cutting device 3 with respect to the cutting device 3 is changed by the lifting hydraulic cylinder 4 within a range where the engaging pin 164 moves up and down in the lower engaging groove 162 in a state where the farm scene is flat. The grounding frame 138 is landed on the farm scene, and the stump height remaining in the farm field is maintained substantially constant.

  As shown in FIGS. 5 to 7, 9, and 10, a second cutting blade drive mechanism 171 that transmits a driving force from the forward / reverse switching case 121 to the second cutting blade 133 is provided. The second cutting blade drive mechanism 171 includes a second cutting blade drive shaft 172 that transmits a driving force to the second cutting blade 133, and an eccentric rotation shaft 174 that is connected to the second cutting blade drive shaft 172 via the bevel gear mechanism 173. The second cutting blade drive crank mechanism 175 is connected to the eccentric rotation shaft 174. As shown in FIGS. 5 and 10, one end of the second cutting blade drive shaft 172 is inserted into the forward / reverse switching case 121, and the intermediate bevel gear 126 is engaged and supported on the second cutting blade drive shaft 172. A second cutting blade drive shaft 172 is connected to the forward / reverse transmission shaft 122 via an intermediate bevel gear 126.

  The second blade driving crank mechanism 175 includes an eccentric rotating body 176 provided on the eccentric rotating shaft 174, a swing rotating shaft 178 connected to the eccentric rotating body 176 via a swing converting body 177, and the swing rotating shaft 178. A swing drive arm 179 to be connected and a push / pull rod 180 to connect the second cutting blade 133 to the swing drive arm 179 are provided. The unidirectional rotation of the eccentric rotation shaft 174 is converted into the swing rotation of the swing rotation shaft 178 (reciprocating rotation that rotates forward and backward within a certain range), so that the swing drive arm 179 is swung, and the push-pull rod 180 is moved. The second cutting blade 133 is slid back and forth through the second cutting blade 133, and the grain cutter in the field is cut by the second cutting blade 133.

  In addition, a cylindrical transmission frame 181 having a second cutting blade drive shaft and a square box-shaped bevel gear case 182 having a bevel gear mechanism 173 are provided. A frame bearing portion 134a at the base end of the left frame 134 is rotatably supported on an eccentric rotation shaft 174 protruding from the bevel gear case 182. One end side of the transmission frame 181 is detachably fastened to the forward / reverse switching case 121, and a bevel gear case 182 is detachably fastened to the other end side of the transmission frame 181.

  That is, the left frame 134 is supported on the forward / reverse switching case 121 via the eccentric rotating shaft 174, the bevel gear case 182, and the transmission frame 181. A bearing post 183 is erected on the front end side of the left frame 134, and the front end side of the swing rotation shaft 178 is pivotally supported on the bearing post 183 via the bearing 184. The second blade driving crank mechanism 175 is disposed in a second blade driving cover 185 that is detachably supported on the left frame 134.

  With the above configuration, the cutting device 3 is driven by the operation of engaging the cutting clutch 115, whereby the second cutting blade 133 is operated together with the first cutting blade 15, and the tip of the uncut grain culm in the field by the first cutting blade 15. The side is cut off, the tip side of the grain pod is brought into the threshing device 9 from the feeder house 11, and the grain is taken out from the grain sorting mechanism 10 to the glen tank 6. On the other hand, the stumps remaining on the traces of the cereal crops harvested by the first cutting blade 15 are cut to a suitable height by the second cutting blade 133, and the height of the stumps remaining in the field after harvesting is approximately constant. Aligned. By reducing the height of the stumps remaining in the field after the harvesting work, the post-treatment work (cultivation work, etc.) of the field can be improved.

  In the harvesting operation, the cutting width of the first cutting blade 15 and the cutting width of the second cutting blade 133 are formed to be substantially the same length, and therefore the second cutting blade 133 is more than the cutting width of the first cutting blade 15. Compared to the structure in which the cutting width is short, even if the meandering movement is performed during the harvesting operation, there is almost no problem that the second cutting blade 133 leaves the stump. Further, the support height of the second cutting blade 133 is adjusted by operating the engagement / disengagement operation lever 169 according to the grain cutting height of the first cutting blade 15, and the second cutting blade 133 with respect to the first cutting blade 15. The height of the stub remaining in the field is adjusted to the stub height desired by the operator.

  Next, with reference to FIG. 11, the drive structure of the cutting device part which shows 2nd Embodiment is demonstrated. As shown in FIG. 11, in the first embodiment, the second cutting blade drive shaft 172 connected between the intermediate bevel gear 126 and the bevel gear mechanism 173, the second cutting blade drive shaft 172 connected to the intermediate bevel gear 126, and the second cutting blade. A bevel gear mechanism side input shaft 191 connected to a bevel gear mechanism 173 that transmits power to 133 is divided. A second cutting blade clutch 192 is provided between the second cutting blade drive shaft 172 and the bevel gear mechanism side input shaft 191. A clutch slider 193 for turning on and off the second cutting blade clutch 192 and a second cutting blade clutch switching shaft 194 for sliding the clutch slider 193 are provided. The second cutting blade clutch switching shaft 194 is provided with a clutch switching arm 195, the left frame 134 (second cutting blade frame) is provided with a lift sensor arm 196, the clutch switching arm 195 is connected with the lift sensor arm 196, and the clutch wire 197. Are linked.

  With the above configuration, when the operator operates the lifting hydraulic cylinder 4 to raise the reaping device 3 to a non-working height during harvesting operations, such as turning on a headland in the field, the left frame 134, the rising sensor arm 196, the clutch wire 197, and the clutch switching arm 195, the second cutting blade clutch switching shaft 194 is operated in conjunction with the ascending operation of the left frame 134, and the clutch slider 193 is slid to the clutch disengagement side. The two cutting blade clutch 192 is automatically turned off and the second cutting blade 133 is stopped. Noise can be reduced, for example, when turning a headland in a field.

  On the other hand, when the operator starts the lifting hydraulic cylinder 4 at the start of the harvesting operation and lowers the cutting device 3 to the cutting operation height, the left frame 134, the lift sensor arm 196, the clutch wire 197, and the clutch switching arm 195. The second cutting blade clutch switching shaft 194 is operated in conjunction with the lowering movement of the left frame 134, the clutch slider 193 is slid to the clutch engagement side, and the second cutting blade clutch 192 is automatically entered. Actuate and actuate the second cutting blade 133. When the harvesting operation is started, forgetting to operate the second cutting blade 133 can be prevented.

  As shown in FIGS. 1, 5 to 7, 9, and 10, the cutting device 3 provided with the first cutting blade 15, the threshing device 9 having the handling cylinder 21, the traveling machine body provided with the engine 7 and the driving seat 42. 1 and a second cutting blade 133 that cuts the remaining stock of the first cutting blade 15, and in the combine that adjusts the stump height of the field with the second cutting blade 133, the rotational driving force of the engine 7 is harvested by the cutting device 3. And a second cutting blade drive mechanism 171 that transmits a driving force from the forward / reverse switching case 121 to the second cutting blade 133. Therefore, the forward / reverse switching case 121 and the second cutting blade drive mechanism 171 can be configured to be detachable. The support structure of the second cutting blade 133 can be simplified or reduced in cost. For example, since it is not necessary to largely project the left front part of the traveling machine body 1 in front of the threshing device 9, it is possible to easily prevent the uncut cereals on the left side of the traveling machine body 1 from contacting the front part of the traveling machine body 1. Further, the support frame 134 of the second cutting blade 133 can be retrofitted without substantially changing the driving structure of the reaping device 3 or the traveling machine body 1 structure to the traveling machine body 1 structure to which the second cutting blade 133 is not attached. Can be assembled easily. Furthermore, the drive structure of the second cutting blade 133 can be easily assembled to the drive structure of the reaping device 3 to which the second cutting blade 133 is not mounted by retrofitting. That is, a structure in which the second cutting blade 133 is not mounted and a structure in which the second cutting blade 133 is mounted can be easily configured with the traveling machine body 1 structure having the same specifications.

  As shown in FIGS. 4, 9, and 10, the feeder house 11 is arranged side by side on the cab 5, and the side of the feeder house 11 is separated from the driver seat 42 of the cab 5. The forward / reverse switching case 121 and the second blade driving mechanism 171 are disposed on the side. Therefore, the forward / reverse switching case 121 or the second cutting blade drive mechanism 171 can be attached and detached in a wide work space on the outside of the feeder house 11 away from the driver seat 42. Assembly / disassembly or maintenance workability of the cutting drive unit can be improved.

  As shown in FIGS. 9 and 10, the second cutting blade drive shaft 172 extends from the forward / reverse switching case 121 and has a second cutting blade drive shaft 172 that transmits a driving force to the second cutting blade 133. The second cutting blade 133 is connected to the second cutting blade drive shaft 172 via a bevel gear mechanism 173. Therefore, for example, the driving noise of the second cutting blade 133 can be easily reduced as compared with a conventional structure in which a driving chain or the like is provided. The connection rigidity between the forward / reverse switching case 121 and the bevel gear mechanism 173 can be improved by the second cutting blade drive shaft 172. Using the forward / reverse switching case 121, the support structure of the second cutting blade 133 can be simplified or reduced in cost.

  As shown in FIGS. 4, 9, and 10, a feeder house 11 is arranged side by side on the cab 5, and a second cutting blade drive shaft 172 that transmits a driving force to the second cutting blade 133, The second cutting blade drive shaft 172 is provided with a transmission frame 181, and the second cutting blade drive shaft 172 and the transmission frame 181 are provided on the outside of the feeder house 11 away from the driver seat 42 of the cab 5. A left frame 134 as a second cutting blade frame is connected to the frame 181 via a bevel gear case 182, and a second cutting blade 133 is attached to the left frame 134. Therefore, the second cutting blade drive shaft 172 and the left frame 134 can be used as a second cutting blade support member that supports the second cutting blade 133. By combining the second cutting blade drive shaft 172 and the left frame 134, the machine structure on which the second cutting blade 133 is installed can be simplified or reduced in cost. Although the support structure of the second cutting blade 133 can be reduced in weight, the support structure of the second cutting blade 133 can be configured with high rigidity by the second cutting blade drive shaft 172 and the left frame 134.

  As shown in FIG. 1 and FIG. 5 to FIG. 10, the cutting device 3 provided with the first cutting blade 15, the threshing device 9 having the handling cylinder 21, the traveling machine body 1 provided with the engine 7 and the driving seat 42, and the first cutting The second cutting blade 133 that cuts the remaining stock of the blade 15 and the second cutting blade drive mechanism 171 that transmits the driving force to the second cutting blade 133 are provided. The second cutting blade 133 adjusts the height of the stump in the field. In the combine, the second cutting blade drive mechanism 171 includes a second cutting blade drive shaft 172 that transmits a driving force to the second cutting blade 133, and a transmission frame as a hollow frame that interpolates the second cutting blade drive shaft 172. The second cutting blade drive shaft 172 and the transmission frame 181 extend from the input portion of the cutting device 3 toward the front. Therefore, the second cutting blade frame structure for supporting the second cutting blade 133 can be simplified by utilizing the second cutting blade drive shaft 172 and the transmission frame 181. Further, the second cutting blade frame structure can be configured with high rigidity while the second cutting blade frame structure can be reduced in weight. On the other hand, for example, the driving noise of the second cutting blade 133 can be easily reduced as compared with a structure in which the second cutting blade 133 is driven by a chain.

  As shown in FIGS. 9 and 10, the transmission frame 181 is connected to a left frame 134 as a second cutting blade frame via a bevel gear case 182, and the second cutting blade 133 is supported via the transmission frame 181. doing. Therefore, by connecting the transmission frame 181 and the bevel gear case 182, the left frame 134 is easily extended, and the substantial front-rear length of the entire left frame 134 as the second cutting blade frame is formed long in the rear side. In addition, the machine support part (forward / reverse switching case 121) of the left frame 134 can be arranged at a high position. For example, compared to a structure in which the main body support portion of the left frame 134 is disposed at substantially the same height as the upper surface of the traveling machine body 1, it is not necessary to project the left side part of the traveling machine body 1 forward. Problems such as the left uncut cereals coming into contact with the grain and coming off can be eliminated.

  As shown in FIGS. 3 and 4 to 9, the feeder house 11 is arranged side by side on the cab 5, and the rotational driving force of the engine 7 is applied to the mowing device 3 on the same side of the feeder house 11. A forward / reverse switching case 121 serving as a forward / reverse switching mechanism for input to the input, a cutting clutch 115 mechanism for driving the cutting device 3, and a second cutting blade drive mechanism 171 having a second cutting blade drive shaft 172 are arranged in a line. doing. Therefore, the forward / reverse switching case 121, the cutting clutch 115 mechanism, the second cutting blade drive mechanism 171 and the like can be assembled or disassembled in a wide working space on the outside of the feeder house 11 away from the driver seat 43. Maintenance workability of the forward / reverse switching case 121, the cutting clutch 115 mechanism, the second cutting blade drive mechanism 171 and the like can be improved.

  As shown in FIGS. 3 and 6 to 9, the feeder house 11 is arranged side by side on the cab 5, and the second cutting blade lifting mechanism for connecting the second cutting blade 133 to the cutting device 3 is used. The second cutting blade height adjusting mechanism 150 and the reinforcing frame 154 as a fixed frame body for locking the second cutting blade height adjusting mechanism 150 to the feeder house 11 are provided on both sides of the feeder house 11. The second cutting blade drive shaft 172 and the second cutting blade height adjusting mechanism 150 are arranged separately, and a reinforcing frame 154 is fixed to the upper surface side of the feeder house 11 in a transverse manner. Therefore, the second cutting blade drive shaft 172 and the second cutting blade height adjusting mechanism 150 can be compactly supported in the vicinity of the left and right side surfaces of the feeder house 11. On the upper surface side of the feeder house 11 formed by sheet metal processing of a relatively thin iron plate, the reinforcing frame 154 can be fixed by welding over the wide width in the left-right direction. While it is possible to construct a structure that hardly requires reinforcement on the upper surface side of the feeder house 11, the connection strength of the reinforcing frame 154 necessary for cantilever support of the second cutting blade height adjusting mechanism 150 can be easily ensured.

  As shown in FIG. 1 and FIG. 5 to FIG. 10, the cutting device 3 provided with the first cutting blade 15, the threshing device 9 having the handling cylinder 21, the traveling machine body 1 provided with the engine 7 and the driving seat 42, and the first cutting The second cutting blade 133 that cuts the remaining stock of the blade 15 and the second cutting blade drive mechanism 171 that transmits the driving force to the second cutting blade 133 are provided. The second cutting blade 133 adjusts the height of the stump in the field. The combine includes a left frame 134, a right frame 135, and a center frame 136 as second cutting blade frames that support the second cutting blade 133, and is connected to the traveling machine 1 through the frames 134, 135, and 136. The cutting blade 133 is mounted, and the left frame 134, the right frame 135, and the center frame 136 are formed to have substantially the same shape and size. Therefore, the steel pipe can be cut into the same length to form the left frame 134, the right frame 135, and the center frame 135, respectively, and the second cutting blade support frame structure can be configured at low cost. By extending the left frame 134 and the right frame 135 straight forward, the left and right cutting widths of the second cutting blade 133 can be secured to the same cutting width as the first cutting blade 15, for example, meandering during the cutting operation Even when traveling, it is possible to easily prevent the second cutting blade 133 from cutting off the residue (long stump) in the field after the tip side is cut by the first cutting blade 15.

  As shown in FIGS. 5 to 10, a forward / reverse switching case 121 is provided on a cutting input shaft 89 that transmits driving force to the cutting device 3, and the forward / reverse switching case is provided via a transmission frame 181 and a bevel gear case 182 as a hollow frame. The left frame 134 is connected to 121. Therefore, by connecting the transmission frame 181 and the bevel gear case 182, the distance between the second cutting blade 133 support part on the one end side of the left frame 134 and the machine attachment part on the other end side of the left frame 134 can be extended rearward. That is, the second cutting blade 133 support portion length (front-rear length) on the left frame 134 side as the second cutting blade frame can be formed long on the rear side, and the machine support portion of the left frame 134 is disposed at a high position. it can. For example, compared to a structure in which the main body support portion of the left frame 134 is disposed at substantially the same height as the upper surface of the traveling machine body 1, it is not necessary to project the left side part of the traveling machine body 1 forward. Problems such as the left uncut cereals coming into contact with the grain and coming off can be eliminated.

  As shown in FIGS. 3 and 5 to 10, a second cutting blade drive shaft 172 that transmits a driving force to the second cutting blade 133, and a transmission frame 181 as a hollow frame into which the second cutting blade drive shaft 172 is inserted. The second cutting blade drive shaft 172 and the transmission frame 181 are provided on the outside of the feeder house 11 away from the driver seat 42, and the left frame 134 is connected to the transmission frame 181 via the bevel gear case 182 to travel. The left frame 134 is connected to the airframe 1 via a transmission frame 181. Therefore, the second cutting blade drive shaft 172 and the transmission frame 181 can be used as the second cutting blade support member that supports the second cutting blade 133, and the base end portion of the left frame 134 is placed at the high position of the traveling machine body 1. I can support it. Since the structure of the lower part on the front side on the left side of the traveling machine body 1 can be simplified, it is possible to prevent the uncut cereals on the outside of the machine from contacting the left side of the traveling machine body 1. The second cutting blade drive shaft 172 and the transmission frame 181 can reduce the weight of the support structure of the second cutting blade 133 by combining the second cutting blade drive shaft 172 and the transmission frame 181. The support structure 133 can be configured with high rigidity.

  As shown in FIGS. 5 to 9, the central frame 136 is formed by a square pipe, and an elastic arm body 144 as a leaf spring body is provided between the traveling machine body 1 and the lower surface of the central frame 136, and the elastic arm body 144 The second cutting blade 133 is configured to repress in the upward direction. Therefore, the traveling machine body 1 and the central frame are connected to each other by a simple connection structure in which the other end side of the elastic arm body 144 is fixed to the traveling machine body 1 side so that one end side of the elastic arm body 144 is elastically pressed against the lower surface side of the central frame 136. The elastic arm body 144 can be assembled between the members 136. The elastic arm body 144 can be configured to have a structure in which the mud adhering to the upper surface of the elastic arm body 144 can be easily removed by elastic deformation of the elastic arm body 144, and the elastic deformation function of the elastic arm body 144 can be easily maintained. Further, the height of the second cutting blade 133 with respect to the main unit is maintained at a certain height or higher by the elastic arm body 144, and the height of the second cutting blade 133 with respect to the first cutting blade 15 can be easily adjusted. Can be changed.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Cutting device 5 Driver's cab 7 Engine 9 Threshing device 11 Feeder house 15 First cutting blade 21 Handle 42 Driving seat 89 Cutting input shaft 115 Cutting clutch 121 Forward / reverse switching case 133 Second cutting blade 134 Left frame (first (2 cutting blade frame)
135 Right frame (second cutting blade frame)
136 Center frame (second cutting blade frame)
144 Elastic arm body (leaf spring body)
171 Second blade driving mechanism 172 Second blade driving shaft 181 Transmission frame (hollow frame)
182 Bevel gear case (hollow frame)

Claims (4)

A reaping device provided with a first cutting blade, a threshing device having a handling cylinder, a traveling machine body provided with an engine and a driving seat, a second cutting blade for cutting a remaining stock of the first cutting blade, and the second cutting blade In a combine that includes a second cutting blade driving mechanism that transmits a driving force, and that adjusts the height of the stub in the field with the second cutting blade,
The second cutting blade frame that supports the second cutting blade includes a left frame, a right frame, and a center frame, and the second cutting blade is attached to the traveling machine body through the frames. A combine characterized in that the frame, the right frame, and the center frame are formed in substantially the same shape and size.   2. The forward / reverse switching case is provided on a cutting input shaft for transmitting driving force to the reaping device, and a left frame is connected to the forward / reverse switching case via a hollow frame and a gear case. Combine.   A second cutting blade drive shaft for transmitting a driving force to the second cutting blade; and a hollow frame for inserting the second cutting blade drive shaft; A cutting blade drive shaft and a hollow frame are provided, the left frame is connected to the hollow frame via a bevel gear case, and the left frame is connected to the traveling machine body via a hollow frame. Combine as described.   The center frame is formed by a square pipe, a leaf spring body is provided between the traveling machine body and the lower surface of the center frame, and the second cutting blade is elastically pressed in the upward direction by the leaf spring body. The combine according to claim 1.

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