JP4855732B2 - Combine harvester - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a technology of a combine harvester that harvests cereal grains in a field using a reaping device and transports the harvested cereal grains to a threshing unit, and more particularly, easily clogs a lower conveyance mechanism (basic conveyance mechanism). It relates to a technology that can be released.

  Conventionally, a harvesting device for a combine has a weeding frame raising device, a scavenging device, a cutting blade device, a transport mechanism, etc. according to the number of cutting lines, on a cutting frame that is attached to the front of the machine base so as to be rotatable up and down. It is attached, and it is scraped while raising the uncut grain cocoon in the field after weeding, and when cutting it, the base of the uncut grain cereal is cut with a cutting blade, and the uncut grain culm in the field is harvested Yes. The harvested grain culm is pinched by a belt with a protrusion, a lower transport device, a guide body, etc. while the tip side is sandwiched between the upper transport device and the tip transport tine, to the vertical transport device at the rear of the harvest device It is configured to be sent.

  Specifically, the ridges of the harvested cereal grains are conveyed rearward by the belt with protrusions and the left and right lower conveyance devices, and the right and left row of the harvested corn grains are immediately behind the right and left lower conveyance devices and immediately before the rear of the other lower conveyance device. After the bases of the two are merged, they are configured to be transferred to the vertical transfer device. And in the conventional reaping device, the distance between the left and right lower conveying devices is fixed at the merging merging portion of the harvested cereal rice cake, and when the heel is clogged between the left and right lower conveying devices, a sickle or the like is removed. It was necessary to remove the clogged clogs.

Therefore, in order to release clogging of the harvested cereal rice cake at the junction, the position of the rotating wheel that winds and supports the rear end of one of the left and right heel feed chains is displaced in the perspective direction with respect to the other left and right heel feed chain. A position holding mechanism that holds the rotating wheel at the approach position is provided, and when the harvested cereal clog is clogged at the junction, the position holding at the approach position of the rotating wheel is released to the separated position. A method has been adopted in which the interval between the lower conveyance devices in the junction is expanded by retracting, and the harvested cereals are extracted from the junction (see Patent Document 1).
JP 2001-275459 A

  However, when a mechanism using a cam with an operation bar as described in Patent Document 1 is used as the position holding mechanism, the rotating wheel can be easily returned to the original approach position after clogging, compared to a mechanism using bolts and nuts. However, there are the following problems. That is, in order to release the position holding of the rotating wheel at the approach position by rotating the cam, the rotating wheel is once further moved forward from the approach position against the clogging reaction force of the harvested cereal meal at the junction. There is a need. Here, the clogging reaction force is the force acting in the direction of expanding these intervals on the lower conveying device in the merging portion by the harvested cereal rice cake that is tightly packed between the lower conveying devices in the merging portion, that is, on the rotating wheel. It is the force that works in the direction of retreating. Further, to further advance the rotating wheel from the approach position means to reduce the interval of the lower transport device at the junction.

  Therefore, a large amount of operating force is required to rotate the cam, and it is impossible to rotate the cam by hand.In fact, the cam is rotated by hitting the operation bar with a hammer or the like, so that The position holding is canceled. As described above, a great deal of labor was required to release clogging of the harvested cereals at the junction. Accordingly, the present invention provides a clogging release device that can easily hold and release the position of the rotating wheel at the approach position, and can easily release clogging of the harvested cereal meal at the junction. .

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
In claim 1, in the combine harvester (8) which weeds and raises a plurality of cereal grains and then cuts them and conveys them to the threshing part via the lower conveying mechanism and the upper conveying mechanism, the lower conveying mechanism Clogging of cereal grains in the junction (X) on the side of the lower left conveyor (31) of the junction (X) of the lower right conveyor (30) and the lower left conveyor (31) The tension mechanism (101) for releasing the tension is provided, and the tension mechanism (101) pivotally supports the tension arm (102) pivotally supporting the movable roller (104) and the fixed roller (105), and the roller (112). The release lever (103) is configured, and a support plate (115) is fixed to the rear portion of the transport frame (114) that supports the lower left transport device (31), and a rotating shaft ( 07), and the fixed roller (105) is pivotally supported on the rotating shaft (107), and the tension arm (102) is also pivotably supported. on the side, a portion for winding the chain on the lower left portion carrying device on the side closer to the merging section (X) (31), the movable roller (104) via a pivot shaft (106) journalled, said By rotating the release lever (103) to the release side, the tension arm (102) can be rotated in the forward direction away from the junction (X) with the rotation shaft (107) as the rotation center, and the release lever One end of (103) is pivotally supported on the support plate (116) of the lower left transport device (31) via a fulcrum shaft (113), and the roller (112) pivotally supported on the release lever (103) Opposite to part (X) A structure in which the tension arm (102) is pressed against the joining portion (X) by contacting the tension arm (102) and contacting the roller (112) in a normal working position. It is.

  According to a second aspect of the present invention, in the combine harvesting apparatus according to the first aspect, the other end of the release lever (103) is fixed to a fixed roller (rotating fulcrum of the tension arm (102) in a normal working position). 105) can be fixed to the portion of the rotating shaft (107).

  According to a third aspect of the present invention, in the harvesting device for the combine according to the first aspect, the pivot shaft (106) on the tension arm (102), which is the rotation center of the movable roller (104), and the roller (112). The center position and the fulcrum shaft (113), which is the rotation center of the release lever (103), are arranged in a substantially straight line at the normal work position.

  According to a fourth aspect of the present invention, in the harvesting device for the combine according to the first aspect, the tension arm (102) may also serve as a plate that prevents the tension arm (102) from being wound around the lower left conveying device (31) in the vicinity of the junction (X). Projecting rearward, and the rearward projecting portion is formed in a substantially bottom shape.

As effects of the present invention, the following effects can be obtained.
In claim 1, in the combine harvester (8) which weeds and raises a plurality of cereal grains and then cuts them and conveys them to the threshing part via the lower conveying mechanism and the upper conveying mechanism, the lower conveying mechanism Clogging of cereal grains in the junction (X) on the side of the lower left conveyor (31) of the junction (X) of the lower right conveyor (30) and the lower left conveyor (31) The tension mechanism (101) for releasing the tension is provided, and the tension mechanism (101) pivotally supports the tension arm (102) pivotally supporting the movable roller (104) and the fixed roller (105), and the roller (112). The release lever (103) is configured, and a support plate (115) is fixed to the rear portion of the transport frame (114) that supports the lower left transport device (31), and a rotating shaft ( 07), and the fixed roller (105) is pivotally supported on the rotating shaft (107), and the tension arm (102) is also pivotably supported. on the side, a portion for winding the chain on the lower left portion carrying device on the side closer to the merging section (X) (31), the movable roller (104) via a pivot shaft (106) journalled, said By rotating the release lever (103) to the release side, the tension arm (102) can be rotated in the forward direction away from the junction (X) with the rotation shaft (107) as the rotation center, and the release lever One end of (103) is pivotally supported on the support plate (116) of the lower left transport device (31) via a fulcrum shaft (113), and the roller (112) pivotally supported on the release lever (103) Opposite to part (X) Since the roller arm (112) is brought into contact with the tension arm (102) and the roller (112) is brought into contact with the tension arm (102) in a normal working position, the tension arm (102) is pressed toward the joining portion (X). When the clogging occurs, the roller is separated from the tension arm by rotating the release lever, and the tension arm is rotated to widen the space of the joining portion, so that the clogging can be easily removed. It becomes like this.

According to a second aspect of the present invention, in the combine harvesting apparatus according to the first aspect, the other end of the release lever (103) is fixed to a fixed roller (rotating fulcrum of the tension arm (102) in a normal working position). 105) can be fixed to the rotary shaft (107) portion, so that even if the cereal is clogged, the tension lever (e.g., the tension lever) is easily applied to the release lever fixing bolt fixed coaxially with the rotation fulcrum. 102), and the bolt can be pulled out.
According to a third aspect of the present invention, in the harvesting device for the combine according to the first aspect, the pivot shaft (106) on the tension arm (102), which is the rotation center of the movable roller (104), and the roller (112). The center position and the fulcrum shaft (113), which is the rotation center of the release lever (103), are arranged in a substantially straight line at the normal work position. The release lever fixing bolt can be pulled out against the force, and the movable roller can be easily held and released at the approaching position.
According to a fourth aspect of the present invention, in the harvesting device for the combine according to the first aspect, the tension arm (102) may also serve as a plate that prevents the tension arm (102) from being wound around the lower left conveying device (31) in the vicinity of the junction (X). Since the projecting part to the rear is configured in a substantially ship bottom shape, the wrapping prevention plate also rotates with the rotation of the tension arm, so that the space of the merging part can be easily expanded. it can. Further, it is not necessary to provide a wrapping prevention plate as a separate body, and cost reduction can be achieved.

  Next, embodiments of the invention will be described. 1 is a side view showing an overall configuration of a combine 100 according to an embodiment of the present invention, FIG. 2 is a front view of the combine 100, FIG. 3 is a skeleton diagram showing transmission of driving force of the reaping device 8, and FIG. Is a plan view showing an upper transport mechanism and a lower transport mechanism, and FIG. 5 is a plan view of a lower left transport device.

  First, the overall configuration of the combine 100 according to the present invention will be described. 1 and 2, reference numeral 1 denotes a track frame on which the left and right traveling crawlers 2 and driving wheels and rollers are installed, 3 denotes a machine base installed on the track frame 1, 4 denotes a handling cylinder 6, a processing cylinder (not shown), and the like. A threshing section, 5 is a feed chain, 8 is a cutting device for four strips equipped in front of the threshing section 4, 9 is a slaughter processing unit that faces the end of a sewage chain (not shown), and 11 is a grain selected after threshing. A grain tank that carries in and stores grains via the milling cylinder 20, a discharge auger that carries out the grains in the grain tank 11, and a driver seat 15, a round steering handle 17, and not shown. A driving operation unit 23 is provided with a main transmission lever, an auxiliary transmission lever, a threshing clutch lever, a harvesting clutch lever, and the like, and an engine 23 is provided below the driver seat 15. In this way, the combine 100 rakes the uncut wheat straw in the field with the mowing device 8 while raising it after weeding, cuts the base of the rice straw with the cutting blade 29 described later, and cuts the harvested grain. It is comprised so that a mash may be conveyed to the said threshing part 4 and threshed.

  Next, the configuration of the reaping device 8 will be described. As shown in FIGS. 1, 2, and 4, the reaping device 8 has a configuration for reaping a plurality of strips. In this embodiment, the reaping device 8 for four strips will be described. The cutting device 8 supports the rear part of the cutting frame 43 at the front part of the machine base 3 so as to be rotatable up and down, and projects five weed plates 24, 24, 24, 24, 24 at the front end of the cutting frame 43, Four raising cases 25a, 25b, 25c, and 25d for raising uncut grain sachets for four strips are erected side by side in a laterally inclined posture at the front portion of the cutting frame 43. And each raising case 25a * 25b * 25c * 25d is each provided with the raising tine 40, and raises the grain candy.

  A star wheel 27a and a belt 28a with a protrusion for scraping are disposed at the lower rear of the pulling case 25a. He is stroking his heel back diagonally to the right. In addition, a right star wheel 27d and a right protrusion belt 28d for right take-up are disposed at the lower rear of the right pulling case 25d, and the right side of the right stripe that is raised by the right star wheel 27d and the right protrusion belt 28d. Scratch the base of the uncut grain cereals diagonally to the left. In addition, a star wheel 27b and a belt 28b with a protrusion for scraping are arranged at the lower rear of the pulling case 25b, and the uncut cereal rice cake of the center right portion raised by the star wheel 27b and the belt 28b with a protrusion is raised. Scratch the heel of the back diagonally to the right. In addition, a star wheel 27c and a belt 28c with a protrusion for scraping are disposed at the lower rear of the pulling case 25c, and the uncut corn kernels for the center left one line raised by the star wheel 27c and the belt 28c with a protrusion are raised. Scratch the heel of the back diagonally to the left. In this way, the scraping device is configured, and the scraping device is used to scrape the uncut grain culm and cut the lower heel with the cutting blade 29.

  And the lower right conveyance apparatus 30 which conveys the base of the right side two cuts of the harvested cereals from the front right to the left rear, and the right lower part transport apparatus which conveys the base of the left two lines of the harvesting straws diagonally right rearward A left lower transfer device 31 that joins the right two strips in the vicinity of the feed end portion 30 is supported by a cutting frame 43 described later. Specifically, immediately before the rear portion of the lower right transport device 30 and behind the lower left transport device 31 (hereinafter, referred to as a merge portion X), the right side of the two reaped harvested rice cakes and the left side of the two upper harvested rice cakes join together. ing. And the upper left conveyance apparatus 32 which conveys the tip side of the cut grain cereals for the left two lanes diagonally right rear, and the heel and the tip of the four halves merging in the vicinity of the feed end portion of the lower right conveyance apparatus 30 A vertical conveyance device 34 that transfers the side to the feed start end of the feed chain 5 of the threshing unit 4 and an upper right conveyance device 35 are supported by a vertical conveyance drive case (not shown).

  As shown in FIG. 1, from the front of the threshing portion 4, a vertical transmission case 37 that is a cutting main frame is protruded obliquely downward and forward, and a bevel gear case is provided at the upper end of the vertical transmission case 37. ing.

  The lower end of the vertical transmission case 37 is integrally connected with an intermediate portion of a horizontal transmission case (not shown) that is horizontally mounted horizontally in the left-right direction of the machine body at the bottom of the cutting device 8. A support body 45 is laterally installed in front of the horizontal transmission case in parallel with the front transmission case. Five cutting frames 43, 43, 43, 43, 43 extend integrally from the lateral transmission case and the support body 45 toward the front of the machine body in parallel. The weed plate 24 is attached to the front end of each cutting frame 43.

  The lateral transmission case is configured to drive the pulling tine 40 by transmitting power to the pulling cases 25a, 25b, 25c, and 25d through bevel gears. Further, a cutting lift cylinder (not shown) is interposed between the substantially central portion of the vertical transmission case 37 and the front portion of the machine base 3. By comprising in this way, the whole cutting device 8 is comprised so that raising / lowering is possible by extending / contracting a cutting raising / lowering cylinder. Further, the handling depth can be adjusted by swinging the vertical conveying device 34 up and down.

  Next, the lower conveyance mechanism which conveys the heel side of the harvested cereal meal will be described. As shown in FIG. 4, the lower transport mechanism is composed of star wheels 27a, 27b, 27c, and 27d, left and right lower transport devices 30 and 31, and the like, and is sent from the front by the belts 28a, 28b, 28c, and 28d with protrusions. The base of the harvested cereal culm is conveyed backward and sent to the feed chain 5 by the vertical conveying device 34 while being guided by a tension arm 102 or the like which will be described later.

  As shown in FIGS. 1 to 4, sprocket shafts 22 a, 22 b, 22 c, and 22 d are pivotally supported on the upper part of the cutting frame 43 in the upward direction. On the sprocket shaft 22a, the left star wheel 27a, a left driven sprocket 26L around which the front portion of the lower left transport device 31 is wound, and a plate around which a belt 28d with a right protrusion is wound are fixed. Has been.

  Similarly, on the sprocket shaft 22d, the right star wheel 27d, a right driven sprocket 26R for winding the front portion of the lower right transport device 30 on the upper portion thereof, and a plate for winding the belt 28a with a right protrusion Is fixed. Here, the star wheels 27a and 27b are pivotally supported at substantially the same height via the sprocket shafts 22a and 22b, and are configured to mesh with each other. The star wheels 27c and 27d are pivotally supported at substantially the same height via the sprocket shafts 22c and 22d, and are configured to mesh with each other so as to be driven to rotate.

  The lower right transport drive shaft 38R protrudes downward from the drive case, and a right drive sprocket 44R is fixed to the lower end of the lower right transport drive shaft 38R. The lower right transport device 30 is wound around the right drive sprocket 44R. The lower left conveyance drive shaft 38L protrudes downward from the drive case, and a left drive sprocket 44L is fixed to the lower end of the lower left conveyance drive shaft 38L. The left drive sprocket 44L is wound around the rear portion of the lower left transfer device 31.

  Next, the power transmission mechanism of the reaping device 8 will be described with reference to FIGS. The power from the engine is transmitted to the input pulley 70 through a belt transmission mechanism, a clutch, etc., and the power is transmitted from the input pulley 70 to the first shaft 81 through a bevel gear provided on the cutting input shaft 55. Power is transmitted from the single shaft 81 to the second shaft 82 via the bevel gear. Then, the chains of the pulling cases 25a, 25b, 25c, and 25d are driven from the second shaft 82 via the pulling shafts 83a, 83b, 83c, and 83d, and the pulling tine 40 is driven.

  Power is transmitted from the cutting input shaft 55 to the lateral transmission shaft 78 through sprockets and chains in the chain case 39. Power is transmitted from the horizontal transmission shaft 78 to the vertical conveyance input shaft 85 via the bevel gear, the upper right conveyance device 35 is driven from the upper portion of the vertical conveyance input shaft 85, and is fixed to the lower portion of the vertical conveyance input shaft 85. The vertical conveying device 34 is driven by the drive sprocket 51.

  In addition, a left upper conveyance drive shaft 88 for extracting power from the middle of the pulling shaft 83a via a gear or the like is provided, and a left upper conveyance device 32 via a drive sprocket 89 provided on the upper left conveyance drive shaft 88. And a left tip transport drive shaft 73 for driving the left tip transport tine (not shown) through the drive sprocket 72 by taking out the power upward from the upper end of the upper left transport drive shaft 88 via the bevel gear. ing.

  The pulling shafts 83a and 83d drive the left and right lower transfer devices 30 and 31 from the middle through gears and the like. That is, as described above, the driving force of the left pulling shaft 83a is transmitted to the lower left conveying drive shaft 38L via a chain or the like, and the left driving sprocket 44L fixed to the lower end of the lower left conveying drive shaft 38L. The lower left transport device 31 is driven. Similarly, the driving force of the right pulling shaft 83d is transmitted to the lower right transport drive shaft 38R via a chain or the like, and transported by the lower right transport by the right drive sprocket 44R fixed to the lower end of the lower right transport drive shaft 38R. The device 30 is driven.

  When the lower left conveyance device 31 is driven, the driven sprocket 26L around which the front portion of the lower left conveyance device 31 is wound is driven, and a left belt drive pulley 46a fixed on the same axis of the driven sprocket 26L is provided. The belt 28a with a left protrusion is driven. A left star wheel 27a is coaxially fixed below the left belt driving pulley 46a, and the left star wheel 27a is driven in the clockwise direction in plan view at the same time as the belt 28a with the left protrusion is driven. , Responsible for transporting the heel back. A central star wheel 27b is coaxially fixed below the central belt drive pulley 46b of the belt 28b with a central protrusion, and the central star wheel 27b meshes with the right star wheel 27a. That is, at the same time as the right projection belt 28a is driven, the right star wheel 27a is driven clockwise in plan view, the central star wheel 27b is driven counterclockwise in plan view, and as a result, the belt 28b with center projection is driven. Is done. Similarly, when the lower right transport device 30 is driven, the driven sprocket 26R around which the front portion of the lower right transport device 30 is wound is driven, and the right belt drive fixed on the same axis of the driven sprocket 26R. The pulley 46d drives the belt 28d with the right protrusion.

  A right star wheel 27d is coaxially fixed below the right belt drive pulley 46d, and the star wheel 27d is driven counterclockwise in a plan view at the same time as the right projection belt 28d is driven. , Responsible for transporting the heel back. A central star wheel 27c is coaxially fixed below the central belt drive pulley 46c of the central protrusion-equipped belt 28c, and the central star wheel 27c meshes with the right star wheel 27d. That is, at the same time as the right projection belt 28d is driven, the right star wheel 27d is driven counterclockwise in plan view, and the central star wheel 27c is driven clockwise in plan view. As a result, the central projection belt 28c is driven. Is done.

  In this way, in the lower transport mechanism, the two left-side chopped grains are transported by the left star wheel 27a, the star wheel 27b, and the lower left transport device 31 to the junction X at the rear base, and the right and middle two strips. The portion of the harvested cereal meal is conveyed between the star wheel 27c, the right star wheel 27d, and the lower right conveying device 30 to the rear junction X. The harvested cereals for the four strips merged before the junction X pass through the junction X and are conveyed to the vertical conveyance device 34 behind the lower conveyance devices 30 and 31.

  Next, a clogging release device that is a main part of the present invention will be described. As shown in FIG. 5, in the junction X, a tension mechanism 101 serving as a means for releasing clogging of cereals is provided in the lower conveyance device on the left and right sides. In this embodiment, the tension mechanism 101 is provided in the lower left conveyance device 31 in the junction X.

  The tension mechanism 101 includes a tension arm 102 and a release lever 103. The tension arm 102 includes a movable roller 104, a fixed roller 105, a guide rail 108, and the like. A transport frame 114 for attaching the constituent members of the lower left transport device 31 is fixed to the harvesting frame 43 of the harvesting device 8, and a support plate 115 is fixed to the rear of the transport frame 114. A pipe-shaped rotating shaft 107 is fixed through the tube. A wrapping prevention plate 109 is fixed to the rotary shaft 107 and is provided to protrude outward (to the left in the traveling direction). On the other hand, the tension arm 102 is provided so as to protrude rearward so as to serve also as a wrapping prevention plate in the vicinity of the merging portion X, and the protruding portion has a substantially bottom shape. The movable roller 104 is disposed at a contact portion with the lower left conveyance device 31 near the junction X on the one side of the tension arm 102, and the movable roller 104 is pivotally supported by a pivot shaft 106 fixed on the tension arm 102. ing. The fixed roller 105 is disposed on the tension arm 102 at a position away from the joining portion X on the side of the machine body (on the left side in the traveling direction). It is supported. That is, one end of the tension arm 102 is pivotally supported at a position distant from the merging portion X on the downstream side, the pivoting shaft serves as the rotating shaft 107 of the fixed roller 105, and the tension arm 102 joins around the rotating shaft 107 as the rotational center. It can be rotated in a direction away from the portion X (counterclockwise in a plan view), and even when a large amount of cereal is conveyed, a predetermined amount is allowable. Then, accompanying the rotation of the tension arm 102, the lower left transport device 31 moves in a direction away from the junction X. A guide rail 108 that guides the rear portion of the chain of the lower left transport device 31 is fixed to the left and right centers of the tension arm 102 by bolts or the like.

  A support plate 116 is fixed to the transport frame 114 so as to guide the inside (right side) of the chain of the lower left transport device 31. A fulcrum shaft 113 is erected on the support plate 116, and one end of the release lever 103 is pivotally supported on the fulcrum shaft 113 so that the other end can be rotated with a bolt or the like. It arrange | positions and it has arrange | positioned so that abutment with the tension arm 102 is possible. That is, the release lever 103 is formed in a substantially triangular shape, and one (first) top portion is pivotally supported by the fulcrum shaft 113 as a rotation fulcrum of the release lever 103, and one (second) top portion is long. Extending laterally, a grip 103a is formed at the tip thereof, an insertion hole 103b is opened at the base of the grip 103a, and the bolt hole 111 provided in the axial center portion of the rotating shaft 107 is aligned with the insertion hole 103b. Thus, the release lever fixing bolt 110 can be screwed to both to be fixed. However, although a bolt is used in the present embodiment, the means for fixing is not limited, and a pin or the like can also be used. A roller 112 composed of a bearing or the like is rotatably supported on the remaining (third) top between the two tops of the release lever 103, and the roller 112 is supported by the left and right (longitudinal direction) of the tension arm 102. ) It is configured to be able to come into contact with a contact portion 102a bent at the front end of the midway portion. In the normal working position, the release lever 103 is fixed to the rotary shaft 107 with a bolt or the like. At this time, the center of the roller 112, the center of the fulcrum shaft 113 that serves as a pivotal fulcrum of the release lever 103, and the movable roller 104 The center of the pivot shaft 106 is arranged on a substantially straight line.

  With this configuration, when the merging portion X is clogged, the movable roller 104 is pushed in the direction of the fulcrum shaft 113, but the release lever 103 itself is not rotated, so the position of the insertion hole 103b Is almost unchanged. Therefore, the release lever fixing bolt 110 screwed into the bolt hole 111 can be easily removed, and the release lever 103 can be rotated clockwise around the axis. As the release lever 103 is rotated, the tension arm 102 is also rotated counterclockwise around the axis, so that the junction X is enlarged and the clogged cereal can be removed. When the release lever 103 and the tension arm 102 are rotated, the roller 112 rolls on the contact portion 102a, so that the frictional resistance is small and no galling or the like occurs, and the original position can be easily returned.

  After removing the clogged rice cake through the above operation, the release lever 103 can be returned to the original position, that is, the release lever fixing bolt 110 is screwed into the bolt hole 111 again.

  In this way, in the harvesting device of the combine that cuts and raises a plurality of cereal grains and then cuts and raises them through the lower transport mechanism and the upper transport mechanism to the threshing section, the merging portion X of the lower transport devices 30 and 31 In addition, by providing a tension arm 102 with two rollers 104 and 105, one of which is movable and one of which is fixed, the release lever fixing bolt 110 can be pulled out without resisting clogging reaction force. It is possible to easily hold the position at the approach position of the roller 104 and release it.

  Further, at the approaching position of the movable roller 104, the center of the fulcrum shaft 113 at the fulcrum position of the release lever 103, the center of the roller 112, and the center of the pivot shaft 106 of the movable roller 104 provided on the tension arm 102 Are arranged in a straight line. Further, when the cereals are clogged, the harvested cereals that are tightly packed between the lower conveyance devices in the junction X will cause the lower conveyance device in the junction X to act in the direction of expanding these intervals, i.e., clogging. The direction in which the reaction force works is configured to be the same direction as the straight line in which the previous centers are arranged.

  In order to release the release lever when the cereal is jammed, the release lever fixing bolt 110 must be pulled out of the bolt hole 111. At this time, the clogging reaction force is not applied to the release lever fixing bolt 110 and the bolt hole 111 at all. Does not work. Therefore, a tool such as a hammer or a spanner is not required when removing the release lever fixing bolt 110. When the cereal is jammed, the release lever fixing bolt 110 is pulled out and the release lever 103 is shifted in the clockwise direction so that the direction of the clogging reaction force, the center of the roller 112 of the release lever 103, and the fulcrum shaft 113 Since the straight line connecting the center is shifted, a moment is generated, and the release lever 103 easily rotates clockwise.

  As described above, the roller 112 is provided at the contact point of the release lever 103 with the tension arm 102, the center of the pivot shaft 106 of the movable roller 104 provided on the tension arm 102, and the center of the roller 112 of the release lever 103. The lower transfer device 30 in the merging portion X is provided by the harvested cereal rice cake which is provided in a straight line with the center of the fulcrum shaft 113 at the fulcrum position of the release lever 103 and is tightly packed between the lower transfer devices in the merging portion X. 31 is provided on the same straight line as the force acting in the direction of expanding these intervals, the force applied to the release lever fixing bolt 110 fixed coaxially with the rotation shaft of the fixing roller 105 even when the cereal is clogged. The bolts can be easily pulled out because it does not take.

The side view which showed the whole structure of the combine 100 which concerns on one Example of this invention. The front view of the combine 100. FIG. The skeleton figure which shows the driving force transmission of the cutting device 8. FIG. The top view which shows an upper conveyance mechanism and a lower conveyance mechanism. The top view of a lower left conveying apparatus.

30 Lower right transport device 31 Lower left transport device 102 Tension arm 103 Release lever 104 Movable roller 105 Fixed roller 108 Guide rail 110 Release lever fixing bolt

Claims (4)

The lower right part that constitutes the lower transport mechanism in the combine harvesting device (8) that weeds and raises a plurality of cereal grains and then cuts and raises the cereals through the lower transport mechanism and the upper transport mechanism to the threshing unit Tension for releasing clogging of cereals in the junction (X) on the side of the lower left conveyor (31) of the junction (X) of the conveyor (30) and the lower left conveyor (31) A mechanism (101) is provided. The tension mechanism (101) includes a tension arm (102) pivotally supporting a movable roller (104) and a fixed roller (105), and a release lever (103) pivotally supporting a roller (112). The support plate (115) is fixed to the rear part of the transport frame (114) that supports the lower left transport device (31), and the rotary shaft (107) is passed through the support plate (115). Solid The fixed roller (105) is pivotally supported on the rotation shaft (107), and the tension arm (102) is also pivotably supported, and the joining portion on one side of the tension arm (102). The movable roller (104) is pivotally supported via the pivot shaft (106) on the portion where the chain of the lower left transport device (31) is wound on the side close to (X), and the release lever (103) is released. The tension arm (102) can be rotated in the forward direction away from the junction (X) with the rotation shaft (107) as the center of rotation, and one end of the release lever (103) is moved to the lower left. The roller (112) pivotally supported on the support plate (116) of the partial transport device (31) via the fulcrum shaft (113) and pivotally supported on the release lever (103) is connected to the junction (X). Opposite tension arm ( 02), and in a normal working position, the roller (112) is brought into contact to press the tension arm (102) toward the joining portion (X). Combine harvester.   The combine mowing apparatus according to claim 1, wherein the other end of the release lever (103) is connected to a rotating shaft (105) of a fixed roller (105), which is a rotation fulcrum of the tension arm (102) in a normal working position. 107) A combine harvester characterized in that it can be fixed to the portion 107).   The combine mowing device according to claim 1, wherein the pivot shaft (106) on the tension arm (102), which is the rotation center of the movable roller (104), the center position of the roller (112), and the release A combine harvester, characterized in that the fulcrum shaft (113), which is the center of rotation of the lever (103), is arranged substantially in a straight line at a normal work position.   The combine mowing device according to claim 1, wherein the tension arm (102) protrudes rearward so as to serve also as a plate for preventing winding around the lower left conveying device (31) in the vicinity of the junction (X), A combine harvester characterized in that the rearward projecting portion has a substantially bottom shape.

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