JP2019024380A - Combine harvester - Google Patents

Abstract

To provide a combine harvester that can improve discharge efficiency by preventing dust from accumulating in a duct.SOLUTION: A combine harvester comprises a conveying device 26 for supplying grain culms reaped by a reaping device to a threshing device, and a dust removing device 7 for discharging dust in the conveying device 26 to the outside. The dust removing device 7 comprises a dust sucking fan 71 for sucking up dust from a dust sucking port formed in the conveying device 26, a duct 72 comprising a hood 721 covering the dust sucking fan 71 and constituting a discharge passage for dust sucked up by the dust sucking fan 71, and a guiding member 73 provided between the dust sucking fan 71 and the hood 721 to guide dust toward a discharge port of the duct 72.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a combine, and more particularly, to a combine dust remover.

  For example, as described in Patent Document 1, a combine is known in which a dust removing device is provided in a transport device that supplies cereals harvested by a reaping device to a threshing device. The dust removing device includes a dust suction fan that sucks up dust in the transport device and a duct that forms a discharge path for dust sucked up by the dust suction fan. By providing the dust removing device in the transport device, it is possible to prevent dust generated by mowing from being scattered around the operation unit.

  However, in the conventional dust remover, dust may stay in the duct, and it cannot be said that the dust discharge efficiency is sufficient, and it has been found that there is room for further improvement. In addition, if dust accumulates near the dust suction fan, part of the cereal that has been sucked up with the dust may wrap around the dust suction fan. A technique for preventing the stagnation is desired.

Japanese Utility Model Publication No. 6-15430

  This invention is made | formed in view of the said situation, The objective is to provide the combine which prevents the stay of the dust in a duct and can improve discharge | emission efficiency.

  The combine according to the present invention includes a transport device that supplies the cereals harvested by the reaping device to a threshing device, and a dust removal device that discharges the dust in the transport device to the outside, and the dust removal device includes the transport device. A dust suction fan for sucking up dust from a dust suction port formed on the duct, a duct that has a hood that covers the dust suction fan and that constitutes a discharge path for the dust sucked up by the dust suction fan, and the dust suction fan and the hood. And a guide member that guides the dust toward the discharge port of the duct. By guiding the dust in the duct toward the outlet using the guide member, it is possible to prevent the dust from staying in the duct and improve the discharge efficiency.

  The guide member is provided so as to partition a space between the dust suction fan and the hood into a first space relatively close to the discharge port and a second space relatively far from the discharge port. It is preferable that the opening of the dust suction fan faces the first space. In the second space, which is relatively far from the duct outlet, the air tends to stagnate and the dust tends to stay, but by separating it with the guide member in this way, the dust sucked up by the dust suction fan is reduced. Since it is sent to the discharge port of the duct without passing through the second space, it is possible to prevent the dust from staying in the duct and improve the discharge efficiency.

  The guide member is preferably provided along the opening. Thereby, it can prevent effectively that dust accumulates in the vicinity of a dust suction fan. As a result, the occurrence of a failure due to a part of the cereal cake sucked up with the dust wound around the dust suction fan is suppressed.

  It is preferable that the dust suction fan is fixed to the hood, and the guide member is fixed to the hood or the dust suction fan. According to such a configuration, since the dust suction fan and the guide member can be handled integrally with the hood, the work of attaching the dust removing device to the transport device is simplified.

  The dust removing device includes a mesh member disposed between the dust suction port and the dust suction fan, and a support member attached to the transport device, and the hood and the mesh member are supported by the support member, respectively. It is preferable that According to this configuration, since the hood and the net member can be handled integrally through the support member, the work of attaching the dust removing device to the transport device is simplified.

  The duct includes the hood disposed on an upper surface of the transport device, and a vertical cover disposed on a side surface of the transport device and having the discharge port at a lower end, and the vertical cover includes the support member. It is preferable that it is supported by. According to this configuration, since the hood and the vertical cover can be handled integrally through the support member, the work of attaching the dust removing device to the transport device is further simplified.

Combine left side view Combine right side view Top view of the combine Diagram showing threshing device and sorting device Longitudinal sectional view of the dust remover Top view of dust remover Perspective view of dust remover Exploded view of dust remover

  An example of a combine according to the present invention will be described. First, the overall structure of the combine will be briefly described. Next, the reaping device, the threshing device, and the sorting device equipped in the combine will be described, and then the dust removing device will be described.

[Overall structure of combine]
1-3 show the left side surface, right side surface, and plane of the combine 100 of this embodiment, respectively. In the figure, the front-rear direction, the left-right direction, and the up-down direction of the combine 100 are indicated by arrows.

  The combine 100 is mainly composed of a traveling device 1, a reaping device 2, a threshing device 3, a sorting device 4, a storage device 5, and a power device 6. On the left side of the threshing device 3 that is a threshing unit, a side cover 33 that covers the left side of a handling cylinder 31 described later is attached. As will be described later, the combine 100 is provided with a grain tank 51 for storing the grain and a discharge auger 52 for discharging the grain from the grain tank 51.

  The traveling device 1 is provided below the chassis frame 10. The traveling device 1 includes a transmission 11 and a crawler device 12 provided in a pair of left and right. The transmission 11 transmits the power of a diesel engine 61 described later to the crawler device 12. The crawler device 12 causes the combine 100 to travel in the front-rear direction, and turns the combine 100 in the left-right direction.

  The reaping device 2 is provided in front of the traveling device 1. The cutting device 2 includes a reel 21, a cutter (cutting blade) 22, an auger (lateral feed screw) 23, a feeder 24, and a rotor 25 (see FIG. 4). The reel 21 guides the cereal straw in the field to the cutter 22 by rotating. The cutter 22 cuts the cereal bowl guided by the reel 21. The auger 23 collects the cereals cut by the cutter 22 at a predetermined position. The feeder 24 includes a transport device 26 that supplies the cereals harvested by the reaping device 2 to the threshing device 3, and a dust removing device 7 described later is attached to the transport device 26. The transport device 26 includes a transport conveyor 27 that transports the cereals collected by the auger 23 to the rotor 25. The rotor 25 sends the cereals that have been conveyed by the feeder 24 to the threshing device 3.

  The threshing device 3 is provided behind the reaping device 2 and the conveying device 26. The threshing apparatus 3 includes a handling drum 31 and a receiving net 32 in a handling chamber. The handling drum 31 threshs the cereal by rotating. The receiving net 32 supports the cereals conveyed by the handling cylinder 31 and drops the cereal to the sorting device 4. In addition, the cereal threshed by the handling cylinder 31 is conveyed backward by a dust feeding valve (not shown) provided above the handling cylinder 31 in the handling chamber.

  The sorting device 4 is provided below the threshing device 3. The sorting device 4 includes an oscillating device 41 and a blower device (karasu) 42. The oscillating device 41 sifts through the cereal and sorts the grain. The grain selected by the swinging device 41 is conveyed by a grain conveying device having the first conveyor 143 and the cereal conveyor 151 and is put into the glen tank 51 through the inlet 153. The blower 42 sorts the grains by blowing away foreign matters such as sawdust included in threshing. Contaminants such as sawdust are finely cut by a cutter and discharged to the outside from a discharge port (not shown) provided behind the sorting device 4.

  The storage device 5 is provided on the right side of the threshing device 3 and the sorting device 4. Therefore, the threshing device 3 and the sorting device 4 and the storage device 5 are arranged in parallel on the left and right above the traveling device 1. The storage device 5 includes a Glen tank 51. The Glen tank 51 stores the grains that have been conveyed from the sorting device 4 through the first conveyor 143 and the cereal conveyor 151. The discharge auger 52 is used when discharging the grains in the grain tank 51. The discharge auger 52 is configured to rotate when performing the grain discharging operation and to discharge the grain to an arbitrary place.

  The power device 6 is provided below the operation unit 13 and in front of the storage device 5. The power unit 6 is composed of a diesel engine 61. The diesel engine 61 converts thermal energy obtained by burning fuel into kinetic energy. More specifically, the diesel engine 61 converts thermal energy obtained by burning fuel into motive power that drives each part such as the traveling device 1. The power unit 6 may be an electric motor that generates power by electricity. The power unit 6 may include both the diesel engine 61 and an electric motor.

  The operation unit 13 is provided in front of the Glen tank 51 and on the right front portion of the aircraft. The driver 13 is provided with a driver's seat 14 on which an operator is seated, and a steering handle 15 disposed in front of the driver's seat 14, and various operating tools such as a shift lever, a clutch lever, and switches around them. Is arranged.

[Reaping device]
As described above, the combine 100 includes the conveying device 26 that supplies the threshing device 3 that has been harvested by the harvesting device 2 to the threshing device 3. The transport device 26 includes a transport conveyor 27 that transports the harvested cereal. The conveyor 27 includes a front rotating body 271 that is rotatably supported at the front end portion of the conveying device 26, a rear rotating body 272 that is rotatably supported at the rear end portion of the conveying device 26, and left and right windings wound around them. A pair of transport chains 273. The lower surface portion of the transfer device 26 is connected to the front end portion of the chassis frame 10 via a hydraulic cylinder 28, and the cutting device 2 is configured to be movable up and down by the hydraulic cylinder 28.

  When the cereals harvested by the reaping device 2 are being transported by the transport device 26, if dust generated from the reaped cereals flows back around the transport device 26 and scatters around the operation unit 13, the operator's field of view is reduced. The working environment deteriorates due to obstacles. Therefore, in this embodiment, the dust removal device 7 is provided in the transport device 26 to prevent dust from being scattered. The dust removing device 7 sucks dust from a dust suction port 261 (see FIGS. 5 and 8) formed in the transport device 26 and discharges the dust to the outside. In the present embodiment, an example in which the dust suction port 261 is formed on the upper surface of the transport device 26 is shown, but the dust suction port may be formed on the side surface or the lower surface of the transport device 26.

[Threshing device]
As described above, the threshing apparatus 3 includes the handling cylinder 31 and the receiving net 32 in the handling chamber. As shown in FIG. 4, the handling cylinder 31 is mainly composed of a center shaft (handle cylinder axis) 311, a handling cylinder start end (scratching screw) 312, and a tooth bar (tooth handling support member) 313. Yes. In the present embodiment, a handling cylinder start end 312 is arranged at the front end of the center shaft 311, and a plurality of tooth bars 313 are arranged in parallel behind the handling cylinder start end 312 around the center shaft 311.

  The center shaft 311 is a structure formed in a straight line, and supports the handling cylinder start end 312 and the tooth bar 313. The center shaft 311 supports the handling cylinder start end 312 at its front end, and supports a plurality of tooth bars 313 from the center to the rear end. The center shaft 311 has a front end portion and a rear end portion rotatably supported by a front wall and a rear wall of the handling chamber.

  The handling cylinder start end 312 is a structure in which a spiral impeller (scraping blade) 312b is detachably formed. The handling cylinder start end 312 scrapes the cereals fed by the rotor 25. That is, the handling cylinder start end 312 rotates to take in the cereals that have been fed by the rotor 25 and send it to the rear of the handling cylinder start end 312 (that is, the handling cylinder 31). The handling cylinder start end 312 is not limited to the structure in which the spiral impeller 312b is formed, and may have a structure in which a plurality of blades are formed.

  The tooth bar 313 is a structure in which a plurality of teeth 313t are arranged in parallel at a predetermined interval. The tooth bar 313 threshs the cereal meal sent out from the handling cylinder start end 312. That is, when the tooth bar 313 rotates, the tooth bar 313 swallows the cereal mash sent out by the handling cylinder start end 312 and hits it to drop the threshing. Part of the cereals and dust that have been threshed by the handling drum 31 flow down to the rear of the handling drum 31 and are discharged from the rear of the threshing device 3. The tooth bar 313 is not limited to a structure having a plurality of teeth 313t, but may have a structure having a spiral blade. Further, in the present embodiment, a plurality of tooth bars 313 and a plate member 314 provided across each tooth bar 313 form a cylindrical shape as a whole by separating the internal space of the handling cylinder 31 and the external space of the handling cylinder 31. However, instead of this, a cylindrical rotary body may be provided with a plurality of teeth 313t. Behind the threshing device 3, a cutter (cutting device) for cutting the cereal can be provided.

  The receiving network 32 is mainly composed of a network body 321. In the present embodiment, the net body 321 is provided so as to cover the lower part of the rotating body constituted by the plurality of tooth bars 313. The net body 321 is a structure in which a plurality of wires 321w are stretched in parallel at a predetermined interval. The net body 321 supports the culm that is swallowed by the tooth bar 313. Further, the net body 321 drops the cereal to the sorting device 4 from the gap. The left end portion and the right end portion of the net body 321 are detachably supported with respect to the threshing device 3.

[Sorting device]
As described above, the sorting device 4 includes the swing device 41 and the blower device 42. As shown in FIG. 4, the oscillating device 41 is mainly composed of a feed pan 411, a chaff sheave 412, and a stroller 413. In the present embodiment, a chaff sheave 412 is disposed behind the feed pan 411, and a stroller 413 is disposed behind the chaff sheave 412.

  The feed pan 411 is a structure that is widely flat. The feed pan 411 receives threshing that has fallen from the receiving net 32. Further, the feed pan 411 is moved back and forth while swinging back and forth while leveling the cereal on the feed pan 411. At this time, the threshing is spread evenly in the left-right direction by the fins 411f attached obliquely.

  The chaff sheave 412 is a structure in which a plurality of sheave plates 412p are attached in parallel at predetermined intervals. The interval between the sheave plates 412p can be changed. The chaff sheave 412 filters the cereals sent from the feed pan 411. That is, the chaff sheave 412 swings back and forth to screen the cereals sent from the feed pan 411. Thereby, the foreign substance mixed in the threshing can be lifted and separated from the grain. In this way, the chaff sheave 412 performs grain selection ("fine selection") from cerealing. After the fine selection, the threshing (the “most processed product including only the grain”) passes through the sieve net 415, is guided by the first flow grain plate 431, and falls to the first basket 43, and the first conveyor 143. It is conveyed to the right side. The threshing remaining on the chaff sheave 412 moves rearward and is sent to the stroller 413.

  The Strollac 413 is a structure in which a plurality of rack plates 413p are attached in parallel at a predetermined interval. The Strollac 413 filters the cereals sent from the chaff sheave 412. That is, the Strollac 413 is swung back and forth to screen the cereals sent from the chaff sheave 412. Thereby, the comparatively big foreign substance mixed in the threshing can be supported and isolate | separated from a grain. In this way, the Strollac 413 performs grain sorting (“fine sorting”) from cereal removal. The cereal after the fine selection (the “second processed product” including the grain and a small number of small impurities) is guided by the second cereal plate 441 and falls to the second basket 44. The cereal that has fallen on the second basket 44 is conveyed to the right side by the second conveyor 144, is reduced and conveyed to the front end side of the sorting device 4, and is subjected to another sorting process. The threshing remaining on the Strollac 413 moves backward and is discharged to the outside.

  Thereafter, the chaff sheave 412 sifts the cereals sent from the feed pan 411. As described above, the threshing after the fine selection including only the grain passes through the sieve net 415 and is then guided by the first style cereal plate 431 and falls to the topmost culm 43. The threshing remaining on the chaff sheave 412 moves rearward and is sent to the stroller 413.

  In addition, the Strollac 413 sifts the cereals sent from the chaff sheave 412. As described above, the threshing after the fine sorting including the grain and a small number of small impurities is guided by the second flow grain plate 441 and falls to the second basket 44. The threshing remaining on the stroller 413 moves rearward and is discharged to the outside.

  The blower 42 is mainly composed of a fan 421 and a fan case 422. In the present embodiment, a fan 421 is disposed below the feed pan 411, and a fan case 422 is disposed so as to cover the fan 421.

  The fan 421 is a structure in which a plurality of fan plates 421p are attached at a predetermined angle. The fan 421 sends wind toward the chaff sheave 412 and the stroller 413, and blows away foreign substances. That is, the fan 421 blows away the dust on the chaff sheave 412, the dust dropped from the chaff sheave 412, the dust on the Strollac 413, the dust dropped from the Strollack 413, etc. by rotating and sending out the wind. . Thereby, the comparatively small foreign substance mixed in the threshing can be isolate | separated from a grain. In this way, the fan 421 performs grain selection from the cereal. The threshing after sorting (including only the grain) is guided by the first-style cereal board 431 and falls to the top 43 most. Alternatively, the cereal after sorting (including grains and a small number of small impurities) is guided by the second flow grain plate 441 and falls to the second basket 44.

  The fan case 422 is a structure formed by bending a plate material. The fan case 422 covers the fan 421 and guides the wind sent out by the fan 421 in a predetermined direction. More specifically, the fan case 422 guides the wind sent out by the fan 421 in a predetermined direction.

[Dust removal equipment]
As described above, the combine 100 includes the dust removing device 7 that discharges the dust in the transport device 26 to the outside. As shown in FIGS. 5 to 8, the dust removing device 7 has a dust suction fan 71 that sucks up dust from a dust suction port 261 formed in the transport device 26, and a hood 721 that covers the dust suction fan 71, and is sucked up by the dust suction fan 71. And a guide member 73 that is provided between the dust suction fan 71 and the hood 721 and guides the dust toward the discharge port 72e of the duct 72. For convenience of explanation, in FIG. 6, the hood 721 is drawn through. In FIG. 7, the portion of the hood 721 that covers the dust suction fan 71 is not shown. The dust removing device 7 further includes a net member 74 disposed between the dust suction port 261 and the dust suction fan 71.

  The dust suction fan 71 includes a casing 712 having an opening 711 that opens in a circular shape toward the hood 721, and a rotary blade 714 that is driven by a motor 713 disposed at the center of the casing 712. The power source for rotating the motor 713 can be taken out of the threshing device 3, for example. A power cord (not shown) for supplying electric power to the motor 713 is connected to the timer unit 715 and to a connector 716 in the duct 72 through a hole 721 h formed in the hood 721. The timer unit 715 prevents the dust suction fan 71 and the net member 74 from being clogged by turning off the motor 713 at regular intervals and temporarily stopping the operation of the dust suction fan 71.

  The dust suction fan 71 is fixed to the hood 721, and more specifically, is attached and fixed to the hood 721 via a pair of brackets 76. Each of the pair of brackets 76 is attached to the inner surface of the hood 721 by a fixture 76b such as a bolt. A plurality of (four in this embodiment) leg portions 712f are formed on the casing 712 of the dust suction fan 71, and each leg portion 712f is attached to the bracket 76 by a fixture 71b such as a bolt.

  The duct 72 includes a hood 721 disposed on the upper surface of the transport device 26 and a vertical cover 722 disposed on a side surface of the transport device and having a discharge port 72e at the lower end. In FIG. 5, the direction in which the air in the duct 72 flows is conceptually represented by arrows. The duct 72 extends in an L shape as a whole by the hood 721 and the vertical cover 722, and the dust sucked up by the dust suction fan 71 is discharged downward. The hood 721 is a horizontal discharge path forming member that forms a horizontal discharge path, and the vertical cover 722 is a vertical discharge path forming member that forms a vertical discharge path. The vertical discharge path forming member can be formed of a cylindrical body. The discharge port 72e is disposed on the left side of the transport device 26 on the side opposite to the operation unit 13.

  The guide member 73 guides the dust in the duct 72 sucked up by the dust suction fan 71 toward the discharge port 72e (in other words, toward the vertical cover 722). Thereby, the stay of the dust in the duct 72 can be prevented and the discharge efficiency can be improved. Further, by preventing the dust from staying in the vicinity of the dust suction fan 71, the occurrence of a failure due to a part of the cereal sucked up with the dust wrapped around the dust suction fan 71 can be suppressed.

  The guide member 73 according to the present embodiment includes a first space 81 that is relatively close to the discharge port 72e and a second space 82 that is relatively far from the discharge port 72e in the space between the dust suction fan 71 and the hood 721. The opening 711 of the dust suction fan 71 faces the first space 81. It is preferable that the opening 711 does not face the second space 82 and the whole area faces the first space 81. In the second space 82 located on the right side of the opening 711 (the side far from the discharge port 72e), air tends to stagnate and dust tends to stay, but by partitioning with the guide member 73 in this way, The dust in the duct 72 is sent to the discharge port 72e without passing through the second space 82, and dust can be prevented from staying.

  In the present embodiment, since the guide member 73 is provided along the opening 711 of the dust suction fan 71, it is possible to effectively prevent dust from staying in the vicinity of the dust suction fan 71. Thereby, generation | occurrence | production of the failure by a part of cereal cake sucked up with the dust around the dust suction fan 71 is suppressed effectively. As shown in FIGS. 6 and 7, the guide member 73 is formed of a curved plate material. The guide member 73 is provided with a hole 73h for allowing the leg portion 712f of the casing 712 to pass therethrough. The guide member 73 is provided from the front inner surface to the rear inner surface of the hood 721 and is curved along the opening 711. Above the dust suction fan 71, the inner surface of the hood 721 is inclined, and the upper edge of the guide member 73 is also inclined along it. The guide member 73 is preferably in close contact with the inner surface of the hood 721 along the longitudinal direction thereof, but a small gap may be formed.

  The guide member 73 is fixed to the hood 721 (see FIG. 8). In the present embodiment, spot welding is performed at three positions of the both ends and the center of the guide member 73 in the front-rear direction and joined to the inner surface of the hood 721. In the central portion of the guide member 73, spot welding is performed with a bent plate material 731 interposed in order to secure a contact area with the inner surface of the hood 721 positioned above. The guide member 73 may be fixed to the dust suction fan 71. Further, the guide member 73 can be fixed using other fixing means such as a screw as well as spot welding.

  As shown in FIG. 5, the hood 721 includes an inclined surface 723 formed above the dust suction fan 71 and inclined upward toward the discharge port 72 e (in other words, toward the vertical cover 722). . The inclined surface 723 preferably covers most of the opening 711 of the dust suction fan 71, and more preferably covers the entire area of the opening 711. Accordingly, in combination with the action of the guide member 73, the air blown up by the dust suction fan 71 is smoothly sent toward the discharge port 72e, which is effective in preventing dust from staying. The hood 721 includes an inclined surface 724 that is inclined upward toward the dust suction fan 71. The air blown up by the dust suction fan 71 and sent to the left side hits the inclined surface 724 and is sent downward. The inclined surface 724 preferably extends upward from a position below the upper edge of the opening 711. Thereby, since the flow of the air which hits the inclined surface 724 can be changed smoothly, it is effective in preventing the stay of dust.

  The net member 74 is disposed so as to cover the dust suction port 261. The net member 74 protects the dust-absorbing fan 71 by preventing part of the harvested cereal from entering the duct 72 together with dust. In the present embodiment, an example in which the net member 74 is a punch metal net formed by a punching metal plate is shown. The punch metal net has less irregularities than the crimp net, and a portion of the harvested cereal is less likely to be caught.

  As shown in FIG. 8, the dust removing device 7 includes a support member 75 attached to the transport device 26, and the hood 721 and the net member 74 are supported by the support member 75, respectively. Accordingly, the hood 721 and the net member 74 can be handled integrally through the support member 75, and the work of attaching the dust removing device 7 to the transport device 26 is simplified. As shown in FIG. 8, the support member 75 includes a frame-like portion 751 disposed so as to surround the dust suction port 261, a plate-like portion 752 provided in a front portion of the frame-like portion 751, and the frame-like portion 751. It has a plate-like portion 753 provided in the rear portion, and an arm portion 754 extending toward the side of the frame-like portion 751 (to the left in this embodiment).

  The support member 75 is attached to the transport device 26 via a fixture 75b. In this embodiment, the bolt as the fixing tool 75b is inserted into the hole 74h formed in the mesh member 74 and the hole 75h formed in each of the plate-like portions 752 and 753 of the support member 75, and is conveyed. It is inserted into a hole 26 h formed in the device 26 and is fastened to a nut (not shown) inside the transport device 26. The net member 74 is disposed inside the frame-like portion 751 and is placed on the pair of plate-like portions 752 and 753. As described above, the net member 74 is fixed to the support member 75 by the bolts as the fixing tool 75b.

  A hinge 725 connected to the frame-like portion 751 is provided in front of the hood 721, and a bracket 726 having a bolt 726 b fixed to the plate-like portion 753 is provided behind the hood 721. . When maintaining the dust suction fan 71, the net member 74, etc., the bolt 726b of the bracket 726 is removed, and the hood 721 is rotated together with the dust exhaust fan 71 with the hinge 725 as a fulcrum, so that the rear of the hood 721 It can be opened. A seal material 727 formed of an elastic material such as sponge is attached to the lower periphery of the hood 721. The sealing material 727 closes the gap between the hood 721 and the support member 75 and the gap between the hood 721 and the vertical cover 722 to improve the sealing performance of the duct 72.

  The vertical cover 722 is supported by the support member 75. In the present embodiment, the hook-shaped portion 722f formed on the upper edge of the vertical cover 722 is hooked on the arm portion 754 of the support member 75, and they are fixed by a fixing tool 722v such as a screw. The fixture 722v is inserted into a hole 722h formed in the hook-shaped portion 722f and is inserted into a hole 754h formed in the arm portion 754. As described above, the hood 721 and the vertical cover 722 are supported by the support member 75, so that the duct 72 constituted by them can be handled integrally.

  In the present embodiment, as described above, the hood 721, the vertical cover 722, and the mesh member 74 are supported by the support member 75, the dust suction fan 71 is fixed to the hood 721, and the guide member 73 is the hood 721. Since it is fixed to (or the dust-absorbing fan 71), these can be assembled in advance and unitized. As a result, it becomes easy to attach the unit to the transport device 26. Specifically, the unitized dust removing device 7 is placed on the upper portion of the transport device 26, the hood 721 is opened, and the mesh member 74, the support member 75, and the transport device 26 are fastened by the fixture 75b. Thus, the unitized dust removing device 7 can be attached to the transport device 26. When the dust removing device 7 is an optional product, a user or the like may attach the dust removing device 7 to an existing combine. Therefore, it is extremely convenient that a simple operation is sufficient.

  In the present embodiment, an example of a normal combine is shown, but the present invention is not limited to this, and the present invention may be a self-removing combine.

  The present invention is not limited to the embodiments described above, and various improvements and modifications can be made without departing from the spirit of the present invention.

2 Harvesting device 3 Threshing device 7 Dust removal device 24 Feeder 26 Transport device 71 Dust suction fan 72 Duct 72 e Discharge port 73 Guide member 74 Net member 75 Support member 81 First space 82 Second space 100 Combine 261 Dust suction port 711 Opening 721 Hood 722 Vertical cover

Claims (6)

A conveying device that supplies the threshing device harvested by the reaping device to the threshing device;
A dust removing device for discharging the dust in the transport device to the outside,
The dust removing device is
A dust suction fan that sucks up dust from a dust suction port formed in the transport device;
A duct having a hood that covers the dust suction fan and constituting a discharge path for the dust sucked up by the dust suction fan;
A combine provided with a guide member provided between the dust-absorbing fan and the hood and guiding the dust toward a discharge port of the duct.   The guide member is provided so as to partition a space between the dust suction fan and the hood into a first space relatively close to the discharge port and a second space relatively far from the discharge port. The combine according to claim 1, wherein an opening of the dust suction fan faces the first space.   The combine according to claim 1 or 2, wherein the guide member is provided along the opening.   The combine according to any one of claims 1 to 3, wherein the dust suction fan is fixed to the hood, and the guide member is fixed to the hood or the dust suction fan. The dust removing device is
A net member disposed between the dust suction port and the dust suction fan;
A support member attached to the transport device,
The combine according to any one of claims 1 to 4, wherein the hood and the net member are each supported by the support member. The duct includes the hood disposed on an upper surface of the transport device, and a vertical cover disposed on a side surface of the transport device and having the discharge port at a lower end portion.
The combine according to claim 5, wherein the vertical cover is supported by the support member.

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