JP6041777B2 - Combine - Google Patents

Description

  The present invention is such that a rear part of a grain tank is connected to a lifting conveyor that is erected on a machine frame so as to be rotatable about a longitudinal axis, and the grain tank is connected to a work position adjacent to a threshing apparatus and the threshing apparatus. The present invention relates to a combine that is configured so that a swing operation using the lifting conveyor as a support shaft can be performed over a maintenance position separated from the machine body laterally outward.

  The above combine includes a lock mechanism that holds the grain tank in the working position, but does not employ a structure for holding the grain tank in the maintenance position (for example, Patent Document 1). reference).

JP-A-8-242679

  In a combine, it is common to equip the rear part of a threshing device with a shredding device for shredding the threshing cereal after the threshing treatment. In order to facilitate maintenance of the shredding device and maintenance from the shredding device side with respect to the threshing device, the shredding device is operated by a swing operation in the horizontal direction with the grain tank side as a fulcrum. It is possible to change the position between the work position connected to the rear end and the maintenance position where the free end side is far away from the rear end of the threshing device to the grain tank side and opens greatly between the rear end of the threshing device. doing.

  In such a combine, for example, when performing maintenance of the threshing device, both the grain tank and the shredding device may be positioned at the maintenance position. In such a maintenance state, for example, in order to facilitate the maintenance of the threshing device from the shredding device side, when trying to further swing the shredding device in the direction away from the threshing device, than the shredding device When a bulky grain tank enters the field of view, contact with the grain tank due to swinging of the shredding device can be predicted, thereby avoiding contact with the grain tank.

  On the other hand, in order to facilitate the maintenance of the threshing device from the grain tank side, when the grain tank is further swung away from the threshing device, the shredding device is hidden by the grain tank. Therefore, the contact with the shredding device due to the swing of the grain tank cannot be predicted, and therefore, it is easy to cause the inconvenience of causing the grain tank to swing unintentionally and contacting the shredding device. It was.

  An object of the present invention is to make it difficult to cause inconvenience of bringing a grain tank into contact with another object by an inadvertent swinging operation of the grain tank during maintenance.

The problem-solving means of the present invention is such that a rear part of a grain tank is connected to a lifting conveyor which is erected on a body frame so as to be rotatable around a vertical axis, and the grain tank is disposed adjacent to a threshing device. In a combine that is configured to be capable of swinging operation using the lifting conveyor as a support shaft over the maintenance position away from the threshing device laterally outward from the machine body,
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor ,
The lifting conveyor is provided with a discharge chute that guides the grains discharged from the discharge port at the upper part thereof down to the outside of the machine body,
The shredding device for shredding the grain threshing from the threshing device from the threshing device, over the work position connected to the rear end of the threshing device and the maintenance position away from the rear end of the threshing device to the grain tank side It is configured to be able to swing around the vertical axis,
In order to avoid interference between the first maintenance position where the separation mechanism of the grain tank from the threshing device is maximized, and the shredding device at the maintenance position and the discharge chute. The position of the grain tank can be maintained at the second maintenance position in which the distance of the grain tank from the threshing device is set to a distance shorter than the first maintenance position.

  According to this means, the grain tank can be held at the maintenance position, and thereby an inadvertent swinging operation from the maintenance position of the grain tank can be prevented.

  Therefore, it is possible to make it difficult to cause inconvenience of bringing the grain tank into contact with another object by an inadvertent swinging operation from the maintenance position of the grain tank during maintenance.

According to this means, the grain discharged from the discharge port of the conveying conveyor can be guided down to a predetermined position outside the machine body by the discharge chute. That is, the grain is provided without a horizontal auger for conveying the grain from the lifting conveyor in the lateral direction, a turning motor for driving the horizontal auger to swing, a hydraulic cylinder for swinging and driving the horizontal auger in the undulation direction, etc. The grain in the tank can be discharged to a predetermined position outside the machine.

When the shredding device is positioned at the maintenance position, the kernel tank is held at the second maintenance position, thereby preventing an inadvertent swinging operation of the kernel tank from the second maintenance position. Can do. Thereby, it is possible to make it difficult to cause the inconvenience that the discharge chute contacts the shredding device by an inadvertent swinging operation of the grain tank.

Further, when the shredding device is not positioned at the maintenance position, by holding the grain tank at the first maintenance position, the space between the threshing device and the grain tank can be greatly opened. Maintenance of the grain tank can be facilitated.

Therefore, the grain stored in the grain tank can be discharged to the outside while simplifying the structure of the grain discharging structure, reducing the weight, and reducing the cost. In addition, the grain discharging structure with a simplified configuration and the like can be less likely to cause inconvenience of contacting the shredding device due to an inadvertent swinging operation of the grain tank.

As one of the means for making the present invention more suitable,
A first member provided with an insertion hole in the up and down direction in either one of the lifting conveyor and the support column is provided,
A second member provided with a plurality of insertion holes facing the insertion holes by a swinging operation of the grain tank is disposed on the other of the lifting conveyor and the support column,
The holding mechanism is composed of the first member and the second member, and an insertion pin that is inserted into the opposed insertion holes.

According to this means, the holding mechanism can be configured easily and inexpensively from the first member, the second member, and the insertion pin.

Another problem-solving means of the present invention is such that a rear part of a grain tank is connected to a transporting conveyor that is erected so as to be rotatable about a longitudinal axis of a machine frame, and the grain tank is adjacent to a threshing device. In a combine configured to be able to perform a swing operation using the lifting conveyor as a support shaft over a work position and a maintenance position away from the threshing device laterally outward,
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor,
A first member provided with an insertion hole in the up and down direction in either one of the lifting conveyor and the support column is provided,
A second member provided with a plurality of insertion holes facing the insertion holes by a swinging operation of the grain tank is disposed on the other of the lifting conveyor and the support column,
The holding mechanism is composed of the first member and the second member, and an insertion pin that is inserted into the opposed insertion holes.

According to this means, the grain tank can be held at the maintenance position, and thereby an inadvertent swinging operation from the maintenance position of the grain tank can be prevented.
Therefore, it is possible to make it difficult to cause inconvenience of bringing the grain tank into contact with another object by an inadvertent swinging operation from the maintenance position of the grain tank during maintenance.
According to this means, the holding mechanism can be configured easily and inexpensively from the first member, the second member, and the insertion pin.

As one of the means for making the present invention more suitable,
At least one of the first member and the second member is provided with a boss that forms the insertion hole.

  According to this means, the insertion posture of the insertion pin extending between the insertion hole of the first member and the insertion hole of the second member can be maintained in a stable posture without any bending.

  Therefore, the grain tank can be held in a stable state at the maintenance position.

As one of the means for making the present invention more suitable,
The lifting conveyor is configured to be vertically removable with respect to a grain discharge case provided at the rear lower part of the grain tank,
A bolt connection between the first connecting part provided in the grain discharge case and the second connecting part provided in the lifting conveyor is configured to prevent the lifting conveyor from coming off with respect to the grain discharging case. ,
The first member or the second member arranged on the lifting conveyor is configured to be bolt-connected to the lifting conveyor together with the bolt connection of the first connecting portion and the second connecting portion.

According to this means, when the lifting conveyor is maintained, the lifting conveyor can be removed from the grain discharge case, and the lifting conveyor can be easily maintained.
Moreover, since the 1st member or the 2nd member of a holding mechanism is attached to a conveyance conveyor using the retention structure of a conveyance conveyor, the number of parts regarding attachment of a retention mechanism can be reduced. Thereby, it is possible to simplify the configuration and reduce the cost by reducing the number of parts.

As one of the means for making the present invention more suitable,
The strut was provided with a stopper for limiting the swing range of the grain tank by abutting against the second connecting portion provided in the lifting conveyor.

According to this means, the rocking operation exceeding the rocking range of the grain tank can be reliably prevented. Thereby, the contact with the other thing by a grain tank exceeding a rocking | fluctuation range can be prevented.
Moreover, the structure for that can be comprised using the retaining structure of a conveyance conveyor. Thereby, it is possible to simplify the configuration and reduce the cost by reducing the number of parts.

As one of the means for making the present invention more suitable,
The stopper is integrally formed with the first member or the second member arranged on the support column.

According to this means, the configuration can be simplified and the cost can be reduced by reducing the number of parts.

As one of the means for making the present invention more suitable,
In the state where the first member or the second member arranged on the lifting conveyor is in contact with the stopper, the insertion hole of the first member is from the threshing device of the grain tank in the second member. It is configured to face the insertion hole provided at the position corresponding to the maintenance position where the separation distance is maximum.

According to this means, the grain tank can be easily positioned at the maintenance position where the separation distance from the threshing device is maximized by bringing the first member or the second member arranged on the lifting conveyor into contact with the stopper. Can do. And in this maintenance position, since the insertion hole of the 1st member opposes the insertion hole of the 2nd member, position maintenance in the maintenance position of a grain tank is performed by inserting an insertion pin in those insertion holes. It becomes easy.
Therefore, the operability when the grain tank is held at the maintenance position can be improved.

As one of the means for making the present invention more suitable,
The holding mechanism is configured to be able to hold the position of the grain tank at a plurality of maintenance positions with different separation distances from the threshing device.

According to this means, the grain tank can be held at an appropriate maintenance position according to various maintenance.

As one of the means for making the present invention more suitable,
The lifting conveyor is configured as a screw conveying type that lifts grains by rotating a lifting screw provided inside a cylindrical conveyor case,
The conveyor case is supported by an upper case portion having a discharge port for discharging the lifted grain and the upper case portion so that relative rotation about the rotation center of the lifting screw is possible. It consisted of a side case part.

According to this means, the direction of the discharge port can be arbitrarily changed around the rotation center of the lifting screw.
Therefore, when the grain stored in the grain tank is discharged outside the machine, the grain discharge direction of the lifting conveyor can be appropriately changed according to the grain discharge location.

Another problem-solving means of the present invention is such that a rear part of a grain tank is connected to a transporting conveyor that is erected so as to be rotatable about a longitudinal axis of a machine frame, and the grain tank is adjacent to a threshing device. In a combine configured to be able to perform a swing operation using the lifting conveyor as a support shaft over a work position and a maintenance position away from the threshing device laterally outward,
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor,
The lifting conveyor is configured as a screw conveying type that lifts grains by rotating a lifting screw provided inside a cylindrical conveyor case,
The conveyor case is supported by an upper case portion having a discharge port for discharging the lifted grain and the upper case portion so that relative rotation about the rotation center of the lifting screw is possible. Combine that consists of a side case.

According to this means, the grain tank can be held at the maintenance position, and thereby an inadvertent swinging operation from the maintenance position of the grain tank can be prevented.
Therefore, it is possible to make it difficult to cause inconvenience of bringing the grain tank into contact with another object by an inadvertent swinging operation from the maintenance position of the grain tank during maintenance.
According to this means, the direction of the discharge port can be arbitrarily changed around the rotation center of the lifting screw.
Therefore, when the grain stored in the grain tank is discharged outside the machine, the grain discharge direction of the lifting conveyor can be appropriately changed according to the grain discharge location.

As one of the means for making the present invention more suitable,
The upper case part was provided with a discharge chute for guiding the grains discharged from the discharge port to flow outward.

  According to this means, the direction of the discharge chute can be changed to the same direction as the direction of the discharge port as the direction of the discharge port is changed around the rotation center of the lifting screw. And the grain discharged | emitted from the discharge port of a conveying conveyor can be suitably flow-down-guided to the predetermined position outside a body by a discharge chute.

It is a right view of a self-detaching combine. It is a top view of a self-desorption type combine. It is a rear view of a self-detaching combine. It is a crossing plane of the principal part which shows the structure of a grain discharging apparatus, and the holding structure in the maintenance position of a grain tank. It is the cross-sectional top view (a) of the principal part which shows the holding structure in the maintenance position of a grain tank, and the right view (b) of the principal part. It is a partially cutaway right side view of the main part showing the configuration of the grain discharging device and the operation structure of the discharging chute. It is a rear view of the principal part which shows the structure of a grain discharge apparatus, and the operation structure of a discharge chute. It is an expanded rear view of the principal part which shows the operation structure of a discharge chute. It is the vertical side view (a) of the principal part which shows the structure of a grain discharging apparatus, and the operation structure of a discharge chute, the cross-sectional top view (b) of a principal part, and the expanded transverse plan view (c) of a principal part. It is a disassembled perspective view of the principal part which shows the structure of a grain discharge apparatus, and the operation structure of a discharge chute. It is a front view of the principal part which shows another embodiment of a discharge guide. They are the perspective view (a) of the discharge chute which shows the structure of the discharge chute in 1st Embodiment, and the longitudinal cross-sectional perspective view (b) of a discharge chute. It is the rear view (a) of the principal part which shows the structure of a flow-down guide plate, and the perspective view (b) of the principal part of a flow-down guide plate. They are the perspective view (a) of the principal part which shows the structure of the discharge chute in 2nd Embodiment, the right view (b) of the principal part, and the rear view (c) of the principal part. It is a perspective view of the principal part which shows the structure of the discharge chute in 2nd Embodiment. It is a disassembled perspective view of the principal part which shows the structure of the conveyance conveyor in another embodiment. It is a partially cutaway right side view of the main part showing the operation structure of the discharge chute in another embodiment.

[First Embodiment]

  Hereinafter, as an example of a mode for carrying out the present invention, a first embodiment in which the present invention is applied to a self-removing combine that is an example of a combine will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the self-removing combine exemplified in this embodiment forms a body frame 1 by connecting a plurality of steel materials such as a square pipe material. A pair of left and right crawlers 2 are provided at the bottom of the body frame 1. On the front side of the right half of the body frame 1, an engine 3 is mounted and a boarding operation unit 4 is formed. A left and right support shaft (not shown) is provided at a front end portion on the left side of the machine body frame 1 for a harvesting and conveying device 5 that harvests a crop culm to be harvested that is located in front of the machine body and transports it to the rear during operation. It is connected and equipped so that it can be moved up and down with a fulcrum. The left half of the machine body frame 1 receives the harvested cereal meal conveyed by the harvesting and conveying device 5 and conveys it to the rear while performing the threshing process on the granulated part of the harvested cereal meal. A threshing device 6 for performing a sorting process is installed. At the upper rear part of the threshing device 6, a threshing cereal conveyance device 8 is provided that receives the threshing cereal after the threshing process from the holding conveyance mechanism 7 of the threshing device 6 and conveys it to the upper rear side of the threshing device 6. At the lower rear end of the threshing device 6, a shredding device 9 that enables shredding and discharging of the threshing cereal mash conveyed by the threshing cereal masher 8 is connected and equipped. On the rear side of the right half of the machine body frame 1, a grain tank 11 made of sheet metal for storing the grains lifted and carried out from the threshing device 6 via the screw feed type supply conveyor 10 is mounted. The grain tank 11 is equipped with a grain discharging device 12 that enables the grain stored in the grain tank 11 to be discharged out of the machine.

  As shown in FIG. 4, the shredding device 9 is attached to a first support column 13 erected on the right rear end of the body frame 1 via a pair of upper and lower vertical support shafts 14 provided on the first support column 13. Thus, they are connected so as to be able to perform a swinging operation in the lateral direction with the support shafts 14 as fulcrums. Thereby, the work position which is located under the threshing mash feeder 8 and is connected to the rear end of the threshing apparatus 6 so that the chopped cereals conveyed by the threshing mash feeder 8 can be shredded and discharged. The swinging operation around the longitudinal axis can be performed across the maintenance position where the free end side is far away from the rear end of the threshing device 6 to the grain tank side and greatly opens between the rear end of the threshing device 6. It is configured as follows.

  Although not shown, the left rear end portion of the threshing device 6 and the free end portion of the shredding device 9 are each equipped with components of a lock mechanism that enables the shredding device 9 to be fixed and held at the working position. ing. Further, the first support column 13 is equipped with a stopper that prevents the shredding device 9 from swinging from a predetermined maintenance position to the grain tank side by the contact of the shredding device 9.

  As shown in FIGS. 1 to 7 and 13, the grain tank 11 has a grain receiving port 11 </ b> A that communicates with a grain outlet 10 </ b> A formed at the upper end of the supply conveyor 10 at the front and rear intermediate positions of the upper left end. Is forming. In addition, inclined parts 11Ba and 11Ca are provided on the lower side of the left and right side plates 11B and 11C to guide the grains stored in the grain tank 11 to flow down to the grain unloading part 11D formed on the bottom part on the left and right center side. . And the grain take-out port 11E which makes it possible to take out the grain stored in the grain tank 11 out of the grain tank is formed at the rear end of the grain carrying-out part 11D.

  As shown in FIGS. 1-10, the grain discharge apparatus 12 is located in the grain carrying-out part 11D, the carrying-out screw 15 which carries out the grain in a grain tank out of the tank from the grain extraction outlet 11E, and the carrying-out screw 15, the conveying conveyor 16 that lifts the grain carried out and discharges it from the upper discharge port 16A, and the discharge chute 17 that guides the grain discharged from the discharge port 16A downward to the right of the machine body, And so on.

  The unloading screw 15 is in a state in which the front end portion of the screw shaft 15A projects forward from the front end of the grain tank 11, and the rear end portion of the unloading screw 15 passes through the grain outlet 11E of the grain tank 11. The grain tank 11 is disposed in the grain unloading section 11D in the front-rear direction so as to be located inside the grain discharge case 18 connected to the bottom rear end of the grain tank 11. And the belt tension type discharge clutch 19 which interrupts transmission from the engine 3 to the grain discharge apparatus 12 is connected to the front end of the screw shaft 15A. A bevel gear (not shown) is connected to the rear end portion of the screw shaft 15 </ b> A so as to rotate integrally with the carry-out screw 15.

  The lifting conveyor 16 includes a cylindrical conveyor case 21 that is vertically connected to the upper end of the grain discharge case 18, a lid 22 that closes an opening 21 </ b> A formed at the upper end of the conveyor case 21, and the conveyor case 21. A screw conveying type is provided by a lifting screw 23 provided rotatably inside, and is connected to the rear part of the grain tank 11 via a grain discharge case 18.

  The lifting screw 23 is configured such that its lower end extends downward from the conveyor case 21 and is positioned inside the grain discharge case 18. A bevel gear (not shown) that meshes with and engages with a bevel gear connected to the screw shaft 15 </ b> A of the carry-out screw 15 is connected to a lower end portion of the screw shaft 23 </ b> A so as to rotate integrally with the feeding screw 23. On the upper part of the lifting screw 23, the union that rotates integrally with the lifting screw 23 to release the grain that has been lifted up to the upper part of the lifting conveyor 16 from the discharge port 16 </ b> A in the horizontal direction. Equipped with a plate 23B.

  The grain discharge case 18 communicates the gear storage space in which the two bevel gears are engaged and supported so as to be interlocked with each other, and the inside of the grain tank 11 and the inside of the conveyor case 21 in a state where the grain can be carried out. It is formed in an L shape having a communication space.

  At the top of the conveyor case 21, a discharge guide 27 that guides the grains discharged from the discharge port 16A formed in the right portion of the upper portion of the conveyor case 21 toward the lower right outside of the conveyor case 21 is detachably bolted. Yes. A discharge chute 17 is disposed at a position directly below the discharge guide 27 in the conveyor case 21 so as to guide the grain guided by the discharge guide 27 to flow outward to the right of the machine body.

  From the above configuration, the grain discharging device 12 can be switched between the operating state and the stopped state by the intermittent operation of the discharging clutch 19. In the operating state, the unloading screw 15 is rotated by the power from the engine 3 via the discharge clutch 19, and the unloading screw 15 and the lifting screw 23 are interlocked via the bevel gear. Thereby, the grain stored in the grain tank 11 can be carried out from the grain outlet 11 </ b> E by the carry-out screw 15 and sent into the communication space of the grain discharge case 18. In addition, the grains fed into the communication space can be transported to the upper part of the transporting conveyor 16 by the transporting screw 23, and the grains transported to the upper part are horizontally directed from the discharge port 16A by the release plate 23B. Can be dissipated. Then, the released grains can be guided by the discharge guide 27 toward the lower discharge chute 17, and the guided grains can be guided by the discharge chute 17 to the bottom of the right outer side of the machine body. It is possible to guide down to a predetermined grain discharge location.

  That is, the grain stored in the grain tank 11 can be satisfactorily discharged by the grain discharging device 12 having a simple and inexpensive configuration including the discharge chute 17 to the grain discharging portion at the lower right side of the machine body.

  As shown in FIGS. 9 and 10, the conveyor case 21 slides on the inner surface of the left portion where the discharge port 16 </ b> A is not formed at the upper portion thereof with the grain subjected to the releasing action of the releasing plate 23 </ b> B in the left portion. A reinforcing plate 38 for suppressing wear due to contact is provided for joining. The reinforcing plate 38 is made of high-strength steel or ultra-high-strength steel having a high strength, and has a semicircular arc shape along the inner surface of the conveyor case 21. And a lower region that is superposed on one pitch of the screw blades. And it attaches to the inner surface of the conveyor case 21 so that attachment or detachment is possible with the some countersunk screw 39. FIG. Further, the head of the countersunk screw 39 is inserted into the countersunk screw insertion hole 38 a of the reinforcing plate 38 such that the head side end surface of the countersunk screw 39 is farther from the feeding screw 23 than the inner surface of the reinforcing plate 38. A counterbore 38b is formed to be submerged.

  Thereby, durability of the conveyor case 21 with respect to the abrasion by the sliding contact with the grain which received the releasing action of the releasing board 23B can be improved. Further, when the reinforcing plate 38 is worn, the reinforcing plate 38 can be easily replaced. In addition, it is possible to effectively suppress wear of each countersunk head due to sliding contact with the grain, resulting in inconvenience that it is difficult to replace the reinforcing plate 38 due to wear of the countersunk head. Can be prevented.

  Incidentally, as a reinforcement structure of the upper part in the conveyor case 21, you may make it equip the reinforcement board 38 by welding to the inner surface or outer surface of the left side part in the upper part of the conveyor case 21 by welding. Further, the reinforcing plate 38 may be detachably connected to the outer surface of the left side portion in the upper part of the conveyor case 21.

  As shown in FIGS. 1 to 3, 6, 7, 9, and 10, the lifting conveyor 16 is configured such that its upper end is located above the upper end of the grain tank 11. The lid 22 provided at the upper end is detachably bolted to the upper end of the conveyor case 21. Further, on the back surface of the lid body 22, there is provided a shaft support portion 22 </ b> A that supports the upper end portion of the screw shaft 23 </ b> A of the lifting screw 23 so as to be relatively rotatable in a state where it can be inserted and removed. Further, the lower end portion of the screw shaft 23A and the bevel gear are connected by fitting (for example, spline fitting) that allows the bevel gear to be engaged and disengaged from the upper side of the screw shaft 23A while allowing the integral rotation thereof. doing. A support portion (not shown) that receives and supports the lower end portion of the lifting screw 23 is provided at the upper end portion of the grain discharge case 18.

  While adopting a structure in which the unloading screw 15 and the lifting screw 23 are interlocked and connected via a bevel gear, the lid 22 is removed from the upper end of the conveyor case 21 so that the lifting screw 23 is directly above. The opening 21 </ b> A located at can be opened. Then, by pulling up the lifting screw 23 from the opening 21A, the fitting between the lower end portion of the screw shaft 23A and the bevel gear can be released, and the lifting screw 23 can be extracted from the conveyor case 21. Thereby, it is possible to facilitate maintenance such as cleaning of the conveyor case 21 and the lifting screw 23, replacement of the lifting screw 23, or replacement of the reinforcing plate 38 described above.

  Further, after the maintenance, the lifting screw 23 can be linked to the carry-out screw 15 by inserting the lifting screw 23 from the opening 21A and fitting the lower end portion of the screw shaft 23A to the bevel gear. Thereafter, the shaft 22A of the lid 22 is fitted to the upper end of the screw shaft 23A, and the lid 22 is bolted to the upper end of the conveyor case 21 so that the feeding screw 23 can be driven inside the conveyor case 21. Can be deployed in an appropriate state.

  In addition, since the upper end of the lifting conveyor 16 is located above the upper end of the grain tank 11, the lifting screw 23 is inserted into the conveyor tank 21 when the lifting screw 23 is inserted into and removed from the conveyor tank 21. It is possible to make it difficult to cause the inconvenience that the feeding screw 23 and the grain tank 11 are damaged due to unexpected contact with the upper part.

  As shown in FIGS. 1 to 12, at the bottom of the grain discharge case 18, a cylindrical support shaft 18 </ b> A that extends downward from the bottom while being concentric with the rotation center of the lifting screw 23. Are integrally formed. The support shaft portion 18A is received and supported from below by the shaft support portion 1A in a state in which the support shaft portion 18A is fitted in the shaft support portion 1A provided at the right rear end portion of the body frame 1 so as to be relatively rotatable.

  The grain discharge case 18 and the conveyor case 21 include left and right first connecting portions 18B that are formed to protrude left and right in the upper part of the grain discharge case 18, and each first connection of the grain discharge case 18 in the lower part of the conveyor case 21. By connecting the left and right second connecting portions 21D arranged in a state of facing the portion 18B with bolts, the grain discharge case 18 and the conveyor case 21 are prevented from coming out of the conveyor case 21 from the grain discharge case 18. In such a connected state, they can be connected so as not to be relatively rotatable.

  Each of the second connecting portions 21D of the conveyor case 21 is welded in a hanging position to a pair of left and right first plate bodies 21Da protruding in the left-right direction at the lower end portion of the conveyor case 21 and the extending ends of the first plate bodies 21Da. The second plate body 21Db.

  The conveyor case 21 is lifted at a predetermined position on the upper and lower intermediate sides to a second support column 24 erected on the right rear end portion of the machine body frame 1 via a holder 25 provided at the upper end portion of the second support column 24. The feed screw 23 is connected in a state in which relative rotation is possible with the screw shaft 23A as a fulcrum. The upper part of the conveyor case 21 is connected to the grain tank 11 via a fixture 26 so as not to be relatively rotatable. The lower end of the conveyor case 21 is connected to the grain discharge case 18 connected to the grain tank 11 so that it can be inserted and removed in the vertical direction.

  From the above configuration, the lifting conveyor 16 of the grain discharging device 12 has a longitudinal axis X passing through the rotation center of the lifting screw 23 and the center of the supporting shaft portion 18A of the grain discharging case 18 as a fulcrum. The machine frame 1 can be erected in a state where it can be rotated, and the grain tank 11 and the grain discharge device 12 can be integrally swung with the lifting conveyor 16 as a fulcrum.

  Thereby, the grain discharge port 10A of the supply conveyor 10 is adjacent to the right end of the threshing device 6 with the grain tank 11 as a fulcrum with the longitudinal axis X (lifting conveyor 16) provided behind the grain tank 11. And the grain receiving port 11A of the grain tank 11 and the working position where the grain receiving port 10A of the supply conveyor 10 communicates and the grain receiving port 11A of the grain tank 11 are released and the threshing device is released. 6 can be swung and displaced over a maintenance position away from the right side of the machine body (see FIG. 2). Then, by swinging and displacing the grain tank 11 to the maintenance position, the right side of the threshing apparatus 6 and the grain while securing a wide space between the threshing apparatus 6 and the grain tank 11 that are adjacent at the work position. The left side of the grain tank 11 can be opened. As a result, the threshing device 6 and the grain tank 11 can be easily maintained.

  Although illustration is omitted, the grain tank 11 is configured to be able to be fixed and held at the work position by the first lock mechanism and the second lock mechanism. The first lock mechanism has an engagement hole formed at a predetermined position of the machine body frame 1 and a downward L-shape provided at the front lower portion of the grain tank 11 in a state of being spring-biased in an engagement direction with respect to the engagement hole. It is comprised so that it may act with respect to the lower part side of the grain tank 11 by the engagement pin of a type | mold. The second lock mechanism is provided with respect to the upper side of the grain tank 11 by a locking pin provided at the front upper part of the threshing device 6 and an engagement hook provided at the front upper part of the grain tank 11 so as to be swingable. It is configured to work. The engagement hook is linked to a lock release lever provided at the front lower part of the grain tank 11 via a linkage rod.

  As shown in FIGS. 1, 2 and 6, the discharge clutch 19 switches the transmission belt 19 </ b> A between a tensioned state and a relaxed state by a swinging operation of the tension arm 19 </ b> B, thereby transferring power from the engine 3 to the grain. It is configured to switch between a transmission state that is transmitted to the discharging device 12 and a blocking state that blocks the transmission. The tension arm 19B is linked via a linkage mechanism 37 to a discharge clutch lever 36 provided at the left rear portion of the driver seat 35 in the boarding driver 4.

  From the above configuration, when the grain tank 11 is swung to the maintenance position, the discharge clutch lever 36 is operated to switch the discharge clutch 19 to the shut-off state, and the transmission belt 19A relaxed by this switching is transferred to the screw shaft. After removing from the output pulley 19C of the discharge clutch 19 rotating integrally with 15A, the maintenance of the grain tank 11 is released by releasing the fixed holding of the grain tank 11 at the working position by the first lock mechanism and the second lock mechanism. The swing operation to the position can be made possible.

  As shown in FIGS. 4 and 5, the second strut 24 is connected to the second connection 24 provided on the right side portion (outer side portion of the fuselage) of the conveyor case 21 during the swinging operation of the grain tank 11 to the outer right side of the fuselage. A steel plate stopper 20 that restricts the swinging range of the grain tank 11 to the right outside of the machine body is provided vertically by contacting the first plate body 21Da of the portion 21D.

  In addition, a holding mechanism 60 that allows the grain tank 11 to be held at the first maintenance position and the second maintenance position is provided across the lifting conveyor 16 and the second support column 24. The first maintenance position is set to a position where the separation distance of the grain tank 11 from the threshing device 6 is maximized. That is, the position of the grain tank 11 obtained when the second plate 21Db of the second connecting portion 21D provided on the right side of the conveyor 16 contacts the stopper 20 is set as the first maintenance position. . The second maintenance position is such that the separation distance of the grain tank 11 from the threshing device 6 is larger than that of the first maintenance position in order to avoid interference between the shredding device 9 swinging to a predetermined maintenance position and the discharge chute 17. It is set to be a short distance.

  The holding mechanism 60 is inserted into the insertion hole 61a of the first member 61 by a swinging operation of the first tank 61 having a boss 61A that forms a vertical insertion hole 61a and the grain tank 11 with the lifting conveyor 16 as a fulcrum. A second member 62 having a first insertion hole 62a and a second insertion hole 62b facing each other, and an insertion pin inserted into the insertion holes 61a, 62a, 62b facing each other between the first member 61 and the second member 62. 63, and the like.

  The first member 61 includes a left and right first connection portion 18B on the side of the grain discharge case and a second left and right connection portion 21D on the side of the conveyor case for preventing the conveyor case 21 from coming off from the grain discharge case 18. It is equipped in the lifting conveyor 16 by bolting to the lifting conveyor 16 together with the bolt connection. The second member 62 is integrally formed with the stopper 20 so as to extend rightward from the upper end portion of the stopper 20 described above. When the second plate 21 </ b> Db of the second connecting portion 21 </ b> D provided on the right side of the transporting conveyor 16 is in contact with the stopper 20, the insertion hole 61 a of the first member 61 is the first insertion of the second member 62. It is configured to face the hole 62a.

  From the above configuration, for example, it is necessary to perform maintenance on the grain tank side or the grain tank 11 of the threshing device 6, and also it is necessary to perform maintenance on the shredding device side of the threshing device 6, the shredding device 9, or the like. If there is not, the state where the threshing device 6 and the grain tank 11 are opened to the maximum extent can be maintained by holding the grain tank 11 at the first maintenance position by the holding mechanism 60. It is possible to facilitate the maintenance of the threshing device 6 on the grain tank side, the grain tank 11 and the like.

  Moreover, when it is necessary to perform maintenance on the grain tank side of the threshing device 6 and the grain tank 11 and the maintenance on the shredding device side of the threshing device 6 and the shredding device 9, the grain tank 11 is used. By maintaining the position at the second maintenance position, maintenance can be performed on the grain tank side and the grain tank 11 of the threshing device 6, and maintenance on the shredding device side of the threshing device 6, the shredding device 9, and the like. Therefore, when the shredding device 9 is oscillated and displaced to the maintenance position, it is possible to avoid the possibility that the shredding device 9 contacts the discharge chute 17 on the grain tank side.

  As shown in FIGS. 7, 9, and 10, the discharge port 16 </ b> A of the transporting conveyor 16 is formed into a vertically long rectangular shape having the same width as the diameter of the conveyor case 21 by a frame member 21 </ b> B provided at the top of the conveyor case 21. Forming. Moreover, it sets so that the grain tank 11 may face the right direction of the machine body in the state where it is located at the work position. And the discharge guide 27 which guides the grain from the discharge port 16A to the discharge chute 17 is detachably bolted to the frame member 21B in a state where the discharge guide 27 is externally fitted to the frame member 21B.

  The discharge guide 27 includes a fixed portion 28 that is bolted to the frame member 21B of the conveyor case 21 and a movable portion 29 that is externally connected to the fixed portion 28 so as to be position-changeable in the grain discharging direction of the transporting conveyor 16. It is composed. The fixing portion 28 includes a pair of upper and lower screwed portions 28a on the front and rear side plate portions. The movable portion 29 is formed with a left and right elongated hole 29a corresponding to the screwing portion 28a in each of the front and rear side plate portions. Then, by connecting the bolts by the butterfly bolts 30 using the screwed portions 28a and the long holes 29a, the connecting position of the movable portion 29 with respect to the fixed portion 28 can be changed within the range of the long holes 29a. The opening area of the opening portion 27A in FIG.

  Each screwing portion 28a is formed by a bolt insertion hole formed in a pair of upper and lower side plate portions on the front and rear sides of the fixing portion 28, and a nut welded to the inner surface side of the fixing portion 28 in a state corresponding to each bolt insertion hole. It is composed.

  Thereby, the opening area of 27 A of opening parts in the discharge guide 27 can be changed according to the wet condition etc. of the grain carried out from the grain tank 11. FIG. And, for example, by changing the connection position of the movable part 29 with respect to the fixed part 28 so that the opening area of the opening part 27A becomes larger as the grain of the grain tank 11 becomes wetter, the wetness of the grain is increased. As a result, it is possible to prevent the occurrence of inconvenience that the grains accumulate in a bridge shape at the opening 27A of the discharge guide 27 and inhibit the discharge of the grains.

  As shown in FIG. 11, the discharge guide 27 can swing in the grain discharge direction of the transporting conveyor 16 via a fixing part 31 that is bolted to the frame member 21 </ b> B of the conveyor case 21 and the fixing part 28 via a hinge 32. And a movable spring 33 that is externally connected to each other, a tension spring 34 as a biasing means 34 that swings and biases the movable section 33 in a direction that narrows the opening area of the opening 27A, and the like. In the discharge state in which the grain is discharged from the discharge port 16A, the movable portion 33 receives the pressing of the grain from the discharge port 16A and swings, so that the opening area of the opening 27A becomes the grain from the discharge port 16A. In the discharge stop state in which the amount changes depending on the discharge amount and the grain is not discharged from the discharge port 16A, the movable portion 33 does not receive the pressing of the grain from the discharge port 16A, thereby opening the opening area of the opening 27A. But Or it may be configured such that the small.

  As shown in FIGS. 2, 3, and 7, the discharge guide 27 has a movable portion 29 in a state where the opening area of the opening 27 </ b> A is minimized regardless of the sliding type and the swinging type. , 33 is configured not to protrude outward from the right end of the aircraft. That is, in the sliding-type discharge guide 27, when traveling without discharging the grain in the grain tank 11, the connection position of the movable portion 29 with respect to the fixed portion 28 is changed so that the opening area of the opening 27A is minimized. In addition, in the swing type discharge guide 27, when traveling without discharging the grain of the grain tank 11, the opening area of the opening 27A is minimized by the action of the tension spring 34, so that it is discharged during traveling. It is possible to make it difficult for the guide 27 to come into contact with other objects.

  As shown in FIGS. 6 to 10, the conveyor case 21 is equipped with a support member 21 </ b> C for the discharge chute by welding at a position directly below the frame member 21 </ b> B via an arc-shaped reinforcing plate 21 </ b> E. The support member 21 </ b> C is provided with an end on the upper side in the grain guiding direction, which is the base end of the discharge chute 17, and a lateral support shaft 40 that is oriented in the front-rear direction when the grain tank 11 is located at the working position. Thus, the discharge chute 17 with the support shaft 40 as a fulcrum is connected so as to be able to swing up and down.

  Thus, by reinforcing the support portion of the discharge chute 17 in the conveyor case 21 with the reinforcing plate 21E, it is possible to prevent the inconvenience that the conveyor case 21 is deformed when the discharge chute 17 is brought into contact with another object. it can. Thereby, the deformation | transformation of the conveyor case 21 can suppress effectively the possibility that the conveyor case 21 and the whole conveying conveyor 16 need to be replaced | exchanged.

  As shown in FIGS. 1 to 4 and 6 to 12, the discharge chute 17 includes an upper chute portion 17 </ b> A that constitutes the upper side of the grain guide direction of the discharge chute 17 and the lower side of the grain direction of the discharge chute 17. The lower side chute | shoot part 17B which comprises is provided. Each chute part 17A, 17B is a groove type including a bottom plate 17a and a pair of side plates 17b rising in parallel from the bottom plate 17a, and the lower chute part 17B slides in the grain guide direction with respect to the upper chute part 17A. It is configured to fit in a movable inscribed state.

  The upper chute portion 17A is capable of swinging up and down with the lateral support shaft 40 as a fulcrum in the right-side posture on the right-hand side that is the discharge port side of the conveyor 16 and the bottom plate 17a facing the right-side portion. It is deployed with. Further, by bending the upper ends of the pair of side plates 17b inwardly, a pair of guide grooves 17c for slidingly guiding the pair of side plates 17b of the lower chute portion 17B in the grain guide direction is formed. The lower-side chute portion 17B has a shape-retaining upper-side connection rod 17d and a lower-side connection to the upper-side end and the lower-side end of the grain guide direction and connecting the upper sides of the pair of side plates 17b. And 17e. The lower-side connecting rod 17e can be used as a gripping portion when sliding the lower-side chute 17B with respect to the upper-side chute 17A.

  The discharge chute 17 includes a lock mechanism 90 for adjusting the chute length that fixes and holds the lower chute 17B at an arbitrary sliding position with respect to the upper chute 17A. The lock mechanism 90 includes a swing arm 92 that is swingably connected to a front side end portion of the front side plate 17b of the upper side chute portion 17A via a support shaft 91 facing forward and backward. The swing arm 92 is formed in a saw blade shape having a plurality of recesses 92a arranged at predetermined intervals in the grain guide direction of the discharge chute 17 at the edge of the discharge chute 17 facing the bottom plate 17a. ing. Then, these concave portions 92a are selectively engaged with the upper-side connecting rod 17d of the lower-side chute portion 17B, so that the lower-side chute portion 17B is fixedly held at an arbitrary sliding position with respect to the upper-side chute portion 17A. It is configured as follows.

  The support shaft 91 is externally equipped with a torsion spring 93 as urging means 93 that urges and oscillates the swing arm 92 toward the upper-side connecting rod 17d of the lower-side chute portion 17B. An L-shaped operating rod 92 </ b> A that facilitates the swinging operation of the swinging arm 92 in the disengagement direction against the bias of the torsion spring 93 is welded to the free end of the swinging arm 92. Each recess 92a of the swing arm 92 receives the upper side connecting rod 17d of the lower chute 17B by the lower edge of the grain guiding direction, and the inclined edge on the upper side of the grain guiding direction from the recess 92a. The upper side connecting rod 17d is formed in a shape that allows it to be detached upward.

  That is, the lock mechanism 90 for adjusting the chute length is configured by the upper-side connecting rod 17d of the lower-side chute portion 17B, the saw-toothed swing arm 92, the torsion spring 93, and the like. Further, the upper-side connecting rod 17d of the lower-side chute portion 17B is configured to also serve as an engaging portion that selectively engages with the plurality of concave portions 92a formed in the swing arm 92.

  When the length of the discharge chute 17 is increased from the above configuration, first, the lower-side connecting rod 17e of the lower-side chute portion 17B and the operating rod 92A of the swing arm 92 are gripped, and the torsion spring 93 is held. The swing arm 92 is swung in the disengagement direction against the urging force, and the engagement between the upper-side connecting rod 17d of the lower chute portion 17B and the recess 92a of the swing arm 92 is released. Next, after sliding the lower chute 17B with respect to the upper chute 17A to the lower side in the grain guiding direction to an arbitrary sliding position, the sliding position at that time is biased by the torsion spring 93. The recess 92a of the swing arm 92 corresponding to is engaged with the upper-side connecting rod 17d of the lower-side chute portion 17B.

  On the other hand, when the length of the discharge chute 17 is shortened, the lower chute 17e of the lower chute 17B is grasped and the upper chute 17A is opposed to the upper chute 17A against the bias of the torsion spring 93. After the lower chute 17B is slid to the upper side in the grain guiding direction to an arbitrary sliding position, the torsion spring 93 biases the concave portion 92a of the swing arm 92 corresponding to the sliding position at that time. Is engaged with the upper-side connecting rod 17d of the lower-side chute portion 17B.

  Thereby, the length of the discharge chute 17 can be easily adjusted to an arbitrary length.

  A reinforcing plate 17f is welded to the support portion of the swing arm 92 in the upper chute portion 17A. And this reinforcement board 17f functions as a stopper which restrict | limits the sliding to the grain guide direction upper side of the lower chute part 17B with respect to the upper chute part 17A by contact | abutting with the lower chute part 17B. It is composed.

  As shown in FIGS. 1 to 3, 6, 7, 9, and 10, the grain discharging device 12 extends from the upper part of the conveying conveyor 16 to the discharging chute 17 on the upper side in the grain guiding direction of the discharging chute 17. A cover body 51 that covers a certain upper side from above is provided to be openable and closable. The cover body 51 is configured by bolting one side edge of a transparent and flexible resin sheet 51B to a shape-retaining member 51A made of sheet metal and bent in a U shape. Then, the discharge guide 27 is connected to the discharge guide 27 via a pair of left and right hinges 52 so as to be able to swing up and down, and a toggle spring 53 is installed over the discharge guide 27 and the shape retaining member 51A, so While permitting, it is configured to be able to switch and hold between a closed state that covers the upper side of the discharge chute 17 from above and an open state that opens the upper side of the discharge chute 17.

  From the above configuration, it is possible to prevent leakage of the grain on the upper side in the grain guiding direction of the discharge chute 17 while configuring the cover body 51 to be light and inexpensive. Regardless of the open / closed state of the cover body 51, the flow state of the grain on the upper side of the discharge chute 17 in the grain guiding direction can be easily visually confirmed. Thereby, when clogging of the grain occurs on the upper side in the grain guiding direction of the discharge chute 17, the cover body 51 is switched to the open state and held, whereby appropriate measures against the clogging of the grain are easily performed. be able to.

  Note that the cover body 51 may be configured to have rigidity by employing a sheet metal material or the like.

  As shown in FIGS. 3 and 6 to 10, the grain discharging device 12 has a chute angle adjusting lock mechanism that fixes and holds the discharging chute 17 that swings up and down with the support shaft 40 as a fulcrum at an arbitrary inclination angle. 41 is provided. The lock mechanism 41 includes a receiving member 42 that is mounted vertically on the bottom plate 17a of the upper chute 17A of the discharge chute 17 along the grain guide direction of the discharge chute 17, and a discharge chute on the conveyor case 21 of the conveying conveyor 16. 17 and a torsion spring 44 as an urging means 44 that urges the urging member 43 to oscillate upward in which the receiving member 42 is positioned. .

  The receiving member 42 is provided with a guide groove 42 </ b> A provided with recesses 42 a to 42 c as three engaged portions for setting an inclination angle with a predetermined interval in the grain guide direction of the discharge chute 17. It is formed vertically along the grain guide direction. The tension member 43 is formed by bending an engaging portion 43a that is alternatively engaged with each of the concave portions 42a to 42c of the receiving member 42 at the free end portion thereof. Then, the engagement portion 43a of the tension member 43 is selectively engaged with the respective recesses 42a to 42c of the receiving member 42 by the operation of the tension member 43 and the action of the torsion spring 44, whereby the engagement state is changed. The discharge chute 17 is received and supported at an arbitrary inclination angle while being maintained.

  The grain discharging device 12 includes a holding mechanism 48 that holds the discharge chute 17 in a retracted position along the lifting conveyor 16 in a retracted position that is closest to the lifting conveyor 16. The holding mechanism 48 is formed by a cylindrical engaging portion 49 provided laterally on the front side of the conveyor case 21 and an elastically deformable holding tool 50 provided on the bottom plate 17a of the upper chute portion 17A of the discharge chute 17. The storage position of the discharge chute 17 that resists the action of the torsion spring 44 provided in the lock mechanism 41 when the holding tool 50 is clamped and engaged with the engaging portion 49 as the discharge chute 17 reaches the storage position. It is configured so that it can be fixedly held at. And the discharge chute | shoot 17 is comprised so that it may not protrude rightward from the right end part of an airframe in the state located in the retracted position.

  From the above configuration, the inclination angle of the discharge chute 17 is set to the first angle for storing the discharge chute 17 in the storage position by the holding mechanism 48, and the engaging portion 43a of the tension member 43 is the lowest position in the receiving member 42. The second angle for discharging the grain, which is engaged with the concave portion 42a and makes the discharge position of the discharge chute 17 closest to the machine body, and the engaging portion 43a of the tension member 43 is the concave portion at the upper and lower intermediate positions in the receiving member 42. The catching member 42 receives the engaging portion 43a of the projecting member 43 and the third angle for discharging the grain, which is engaged with 42b so that the discharging position of the discharging chute 17 is separated from the machine body to the right outside of the second angle. The discharge position of the discharge chute 17 can be changed into four stages with the fourth angle for discharging the grain most spaced from the machine body.

  That is, in addition to adjusting the length of the discharge chute 17 in the grain discharge direction, by changing the inclination angle of the discharge chute 17, the discharge position in the height direction of the discharge chute 17 can be changed more finely. Since the discharge position of the discharge chute 17 in the lateral direction of the machine body can be changed, the discharge position of the discharge chute 17 can be easily changed to a more appropriate position with respect to the grain discharge location. As a result, the grain can be discharged satisfactorily by the discharge chute 17 regardless of the grain discharge location.

  In the state in which the discharge chute 17 is switched to the storage position, the discharge chute 17 can be stably held in the storage position by the holding mechanism 48, so that the discharge chute 17 is discharged due to vibration of the airframe while traveling. It is possible to reliably prevent the occurrence of inconvenience that the chute 17 unexpectedly switches from the storage position to the discharge position and contacts other objects.

  In addition, by changing the inclination angle of the discharge chute 17, it is possible to adjust the flow rate of the grain that is guided down by the discharge chute 17. Thereby, by changing the inclination angle of the discharge chute 17 in accordance with the fluidity that changes depending on the moisture content of the grain, it is possible to adjust the grain flow speed to an appropriate speed. As a result, it becomes easy to avoid the occurrence of a grain clogging in the discharge chute 17 due to a decrease in fluidity, and a reduction in work efficiency due to the grain clogging in the discharge chute 17 can be prevented.

  Further, by providing the lower chute portion 17B of the discharge chute 17 with upper and lower connecting rods 17d, 17e, these connecting rods 17d, 17e can be used as a gripping portion when the inclination angle of the discharge chute 17 is changed. Can do. Thereby, the operativity at the time of changing the inclination-angle of the discharge chute 17 can be improved.

  As shown in FIGS. 1-3 and FIGS. 6-10, at the upper part of the grain tank 11, a mechanical linkage type operating mechanism 95 that allows the discharge chute 17 to swing up and down from the front of the grain tank 11 is provided. It has. The operation mechanism 95 includes a front-rear rotation shaft 96 penetrating the upper part of the grain tank 11 in the front-rear direction, an operation lever 97 detachably connected to the front end of the rotation shaft 96, and the rear of the rotation shaft 96. The operation lever 97 and the operation arm 98 are configured to swing integrally through the rotation shaft 96 by an operation arm 98 for the discharge chute provided at the end.

  The grain tank 11 includes a pair of front and rear shaft support portions 99 that rotatably support the rotation shaft 96. The rotation shaft 96 and the operation arm 98 of the operation mechanism 95 and the support shaft 40 of the discharge chute 17 are made of a single round bar steel material so that the rotation shaft 96 and the support shaft 40 are located on the same axis, and The operation arm 98 is integrally formed so as to extend from the rear end of the support shaft 40 toward the bottom plate 17 a of the discharge chute 17. A torsion spring 100 as an urging means 100 for oscillating and urging the discharge chute 17 upward via an operation arm 98 is fitted to the support shaft 40. The operation lever 97 is detachably pin-connected to the front end portion of the rotating shaft 96 in such a posture that the operation lever 97 does not protrude rightward from the right end portion of the airframe during the swinging operation.

  Below the operation mechanism 95 for the discharge chute in the upper part of the grain tank 11, a mechanically linked locking operation mechanism 101 that enables operation of the lock mechanism 41 for adjusting the chute angle from the front of the grain tank 11. It has. The lock operation mechanism 101 includes a lock rotation shaft 102 extending in the front-rear direction penetrating the upper portion of the grain tank 11 in the front-rear direction, and a lock operation lever detachably connected to a front end portion of the lock rotation shaft 102. 103, etc., the lock operation lever 103 and the tension member 43 of the lock mechanism 41 are configured to swing together through the lock rotation shaft 102.

  The grain tank 11 includes a pair of front and rear shaft support portions 104 that rotatably support the lock rotation shaft 102. The lock rotation shaft 102 and the tension member 43 of the lock mechanism 41 are integrally formed by bending a single round steel bar. The lock operation lever 103 is detachably connected to the front end portion of the lock rotation shaft 102 in such a posture that the lock operation lever 103 does not protrude rightward from the right end portion of the machine body during the swinging operation.

  From the above configuration, the discharge chute is operated by operating the operation lever 97 and the lock operation lever 103 located at the front end of the grain tank 11 while being in the boarding operation unit 4 located in front of the grain tank 11. The inclination angle of 17 can be changed and fixed at an arbitrary inclination angle. Further, the effort required to change the inclination angle of the discharge chute 17 can be reduced by the action of the torsion spring 100 for the discharge chute and the torsion spring 44 for the tension member. Furthermore, it is possible to prevent the operation lever 97 and the lock operation lever 103 from coming into contact with other objects due to the right end portion of the machine body protruding outward.

  As shown in FIGS. 1, 3, 6, 7, and 10, an auxiliary chute 46 made of a transparent resin sheet having flexibility is provided at the free end portion of the discharge chute 17 in the grain guide direction view. The bolts are connected in a U-shape. The free end portion of the auxiliary chute 46 is equipped with a band 47 that is inserted into round holes 46a formed at both front and rear ends of the free end portion to change the width of the free end portion.

  From the above configuration, for example, when the grain discharge target is a truck bed or the like, the opening of the auxiliary chute 46 at the grain discharge end is widened by loosening the band 47. it can. Thereby, the grain can be discharged in a state of being diffused in a wide area such as a truck bed.

  When the grain discharge target is a bag or the like, the band 47 can be tightened to form a cylindrical shape with a narrowed opening at the grain discharge end of the auxiliary chute 46. Thereby, a grain can be discharged | emitted in the state concentrated on narrow areas, such as a bag.

  That is, while having a simple configuration using the flexible auxiliary chute 46 and the band 47, the front end at the grain discharge end of the auxiliary chute 46 can be easily sized to be suitable for a grain discharge target or the like. The grain can be changed, and the grain suitable for the grain can be discharged well.

  As shown in FIG. 13, just below the carry-out screw 15 in the grain tank 11, a flow-down guide plate 80 having a reverse V-shaped cross section for guiding the grains in the grain tank to the left and right of the carry-out screw 15. Is deployed in a front-back orientation along the carry-out screw 15. The descending guide plate 80 is interlocked with the drive of the carry-out screw 15 so that the support shaft 80A swings left and right with the support shaft 80A provided at the upper end thereof as a fulcrum. And the unloading screw 15 are linked together.

  The left and right auxiliary guide plates 81 are detachably bolted to the left and right guide portions 80B of the flow guide plate 80 by using screwed portions 80a provided in pairs in the front-rear direction. . And by changing the attachment position and attachment direction of each auxiliary guide plate 81 with respect to each guide portion 80B, the flow guide length of the grain by the flow guide plate 80 is changed to the shape of the grain tank 11 and the moisture content of the grain. It can be changed according to

  Specifically, the flow guide plate 80 has only a lower screwing portion 80a in the left guide portion 80B such that the flow guide length on the left side is the longest according to the shape of the left side of the grain tank 11. The left auxiliary guide plate 81 is bolted in the longest state with the surface on the upper side and the bent part on the lower side. Further, the right auxiliary guide plate is used by using both the upper and lower screwed portions 80a in the right guide portion 80B so that the flow guide length on the right side becomes the shortest according to the right shape of the grain tank 11. 81 is bolt-connected in the shortest state with the back side facing up and the bent part facing up. And, when the moisture content of the grain is large, the flow guide length on the left side uses both the upper and lower screwing portions 80a in the left guide portion 80B, and the left auxiliary guide plate 81 is placed on the surface. By bolting in an intermediate length state with the bent part on the upper side, the occurrence of grain clogging at the lower part of the grain tank 11 due to the high moisture content of the grain is prevented. be able to.

[Second Embodiment]

  Hereinafter, as an example of an embodiment for carrying out the present invention, a second embodiment in which the present invention is applied to a self-removing combine that is an example of a combine will be described with reference to the drawings.

  Since the second embodiment differs from the first embodiment only in the configuration of the discharge chute 17, only the configuration of the discharge chute 17 will be described.

  As shown in FIGS. 14 and 15, the discharge chute 17 includes an upper chute portion 17 </ b> A that constitutes the upper side of the grain guide direction of the discharge chute 17 and a lower side that constitutes the lower side of the grain guide direction of the discharge chute 17. And a chute portion 17B.

  The upper chute portion 17A is capable of swinging up and down with the lateral support shaft 40 as a fulcrum in the right-side posture on the right-hand side that is the discharge port side of the conveyor 16 and the bottom plate 17a facing the right-side portion. It is deployed with. The free end portion of the upper-side chute portion 17A is provided with a shape-retaining connecting rod 17g that connects the upper ends of the pair of side plates 17b.

  The lower chute portion 17B is connected to the upper chute portion 17A by connecting one end of each side plate 17b to the free end portion of each side plate 17b in the upper chute portion 17A laterally via a pair of support shafts 17C. On the other hand, it is configured to be swingable up and down. Then, by a downward swing using a pair of support shafts 17C with respect to the upper chute portion 17A as a fulcrum, the upper chute portion 17A is switched to an action position connected to the lower side of the grain guiding direction of the upper chute portion 17A, and the upper chute portion 17A. As a result of the upward swing using the pair of support shafts 17C as fulcrums, the upper chute 17A is switched from the upper position to the non-actuated position so as to be fitted over.

  That is, the length of the discharge chute 17 in the grain guiding direction is changed by switching the lower chute 17B between the operating position and the non-operating position by vertically swinging the lower chute 17B relative to the upper chute 17A. The length in the grain guide direction of the upper chute 17A and the length in the grain guide direction of the upper chute 17A are added to the length in the grain guide direction of the upper chute 17A. The length is set to a long length and can be adjusted in two steps.

  From the above configuration, when the grain is discharged to a high place such as a truck bed, the discharge chute 17 is changed to a short state so that the discharge chute 17 stands up around the bed. The grain can be efficiently discharged to the truck bed or the like while making it difficult to contact the truck. In addition, in this short state, the lower chute portion 17B is fitted over the upper chute portion 17A so as to cover the upper chute portion 17A from above, so that the lower chute portion 17B is adjacent to the upper chute portion 17A in the vertical direction or front and rear. Compared with the case where it does, it is not necessary to secure the storage space for the lower chute portion 17B around the upper chute portion 17A, and the discharge chute 17 in a short state can be made compact. As a result, it is possible to easily avoid contact with the discharge chute 17 that has been switched to the short length without causing an increase in the size of the combine as a whole.

  On the other hand, when carrying out a bag removal in which the grains from the discharge chute 17 are packed into a bag or the like, the discharge chute 17 is switched to the long state so that the guide terminal portion of the discharge chute 17 is brought to the hand height position. Can be positioned. As a result, it is possible to simply and easily carry out the bag removal of the grain from the discharge chute 17, and the labor required for bag removal can be reduced. In addition, in this long state, since the discharge chute 17 has a groove shape over its entire length, if clogging of the grain occurs in the discharge chute 17 during bag removal, the clogging is quickly detected visually. It can be found, and the clogged grains can be easily swept down toward the lower side of the discharge chute 17 with a hand inserted from the open portion of the discharge chute 17.

  The discharge chute 17 includes a lock mechanism 17D that holds the lower chute portion 17B in the non-acting position. The lock mechanism 17D engages the engagement pin 17i with a hook member 17h provided on the upper chute portion 17A so as to swing up and down, an engagement pin 17i provided laterally on the lower chute portion 17B, and the hook member 17h. The torsion spring 17k is urged.

  In the upper chute 17A, the lower chute 17B is received by receiving the upper end of the lower chute 17B in the grain guiding direction in accordance with the switching to the operating position of the lower chute 17B. A stopper (not shown) is provided for holding. Then, by receiving the lower chute portion 17B with this stopper, the lower chute portion 17B is stably maintained in line with the upper chute portion 17A at the operating position.

  The lower chute portion 17B is provided with a guide plate 17F for switching the discharge width of the discharge chute 17 between a wide state for normal discharge with respect to a truck bed or the like and a narrow state for bag removal. The guide plate 17F is fitted on one end of the guide plate 17G to the support shaft 17G so that the guide plate 17F swings around the support shaft 17G standing on the intermediate side in the width direction of the free end of the bottom plate 17a of the lower chute 17B. doing. Further, the swing from the vertical posture to the rear is prevented by a receiving pin 17H that is erected on the lower side chute portion 17B at the intermediate position in the width direction of the bottom plate 17a. As a result, when the lower chute 17B swings between the non-operating position and the operating position, the lower chute 17B is swung by its own weight with the support shaft 17G serving as a fulcrum. In the non-acting position, a hanging state is maintained in which the pair of side plates 17b hangs down along the side plate 17b while the distance between the pair of side plates 17b is set to the discharge width of the discharge chute 17, At the operating position of the lower chute portion 17B, the free end is in contact with the front side plate 17b and is inclined so that the rear side plate side is positioned downward from the front side plate 17b toward the rear side plate 17b. Maintaining the inclined posture, a length shorter than the separation distance between the pair of side plates 17b (separation distance between the rear side plate 17b and the end of the oscillator of the guide plate 17F) is set as the discharge width of the discharge chute 17. It is configured so that the width becomes narrow state.

  From the above configuration, when the lower chute 17B is switched to the non-operating position, and the discharge chute 17 is switched to a short state suitable for discharging grains to a truck bed or the like, the discharge width of the discharge chute 17 As a result, it is possible to automatically obtain a wide state for normal discharge with respect to a truck bed or the like. In addition, when the lower chute 17B is switched to the operating position and the discharge chute 17 is switched to a long state suitable for taking a grain bag, the discharge chute 17 has a narrow width for bag removal. Can be obtained automatically.

  That is, only by switching the lower chute portion 17B between the non-acting position and the acting position, the discharge chute 17 has a discharge width of the discharge chute 17 along with the length of the discharge chute 17 in the grain guiding direction. Can be changed. Thereby, the operation | work at the time of picking up a grain can be facilitated, aiming at the improvement of the working efficiency at the time of discharging | emitting a grain to the loading platform etc. of a truck.

[Another embodiment]

[1] The combine may be configured as a whole-pile-feeding type in which the whole of the harvested cereal straw is put into the threshing device 6. Further, the boarding operation unit 4 may be configured to be covered with a cabin.

[2] As shown in FIG. 16, as the conveyor 16, the cylindrical case 21 is supported by the second support column 24 and the like, and the lower case 21F is rotated relative to the lower case 21F. The upper case portion 21G is fitted into the upper case portion 21G. The upper case portion 21G is equipped with a discharge guide 27 and a discharge chute 17, and the discharge chute 17 passes through the center of rotation of the feed screw 23. You may comprise so that the rocking | fluctuation operation which made the center X the fulcrum is attained.
Although not shown, in this configuration, for example, a swinging operation with the longitudinal axis X of the discharge chute 17 as a fulcrum by the operation of the operation lever provided in the boarding operation unit 4 can be performed. The operation lever and the discharge chute 17 may be configured to be linked to each other via a linkage wire or the like.

[3] As shown in FIG. 17, the support shaft 40 of the discharge chute 17 may be configured independently. In this case, in the operation mechanism 95 of the discharge chute 17, the rotating shaft 96 and the operation arm 98 may be integrally formed by bending a single round bar steel material or a round pipe material.
In this configuration, the support shaft 40 of the discharge chute 17 and the rotation shaft 96 of the operation mechanism 95 may be arranged on the same axis, or may not be arranged on the same axis. You may comprise.

[4] A bucket conveyor may be adopted as the lifting conveyor 16.

[5] The discharge chute 17 may be configured such that the length cannot be adjusted. Moreover, various changes are possible as the length adjustment step number in the grain guide direction of the discharge chute 17, and for example, the length may be adjusted to two steps or four steps or more. Further, the discharge chute 17 may be formed in a round pipe shape or a square pipe shape.

[6] The holding mechanism 60 may be configured to hold the grain tank 11 at a maintenance position other than the first maintenance position and the second maintenance position.

[7] The holding mechanism 60 may be configured by disposing the second member 62 on the conveyor 16 and disposing the first member 61 on the support (second support) 24. In this structure, you may comprise the 2nd member 62 so that it may be bolt-connected to the conveyance conveyor 16 with the bolt connection of the 1st connection part 18B and the 2nd connection part 21D. Further, the first member 61 and the stopper 20 may be integrally formed.

[8] As the holding mechanism 60, the insertion holes 62a and 62b of the second member 62 may be formed by bosses.

[9] The first member 61 or the second member 62 provided on the support column (second support column) 24 may be configured to include a stopper 20 that is separate from them.

  The present invention is configured such that the grain tank can be swung with a lifting conveyor as a support shaft over a work position adjacent to the threshing apparatus and a maintenance position away from the threshing apparatus laterally outward. It can be applied to self-detaching and all-throw-in type combine harvesters.

DESCRIPTION OF SYMBOLS 1 Airframe frame 6 Threshing device 9 Shredding device 11 Grain tank 16 Lifting conveyor 16A Discharge port 17 Discharge chute 18 Grain discharge case 18B 1st connection part 20 Stopper 21 Conveyor case 21D 2nd connection part 21F Lower case part 21G Upper case portion 23 Lifting screw 24 Post 60 Holding mechanism 61 First member 61A Boss 61a Insertion hole 62 Second member 62a Insertion hole 62b Insertion hole 63 Insertion pin X Vertical axis

Claims (12)

The rear part of the grain tank is connected to a lifting conveyor which is erected on the machine frame so as to be pivotable around the vertical axis, and the grain tank is connected to the work position adjacent to the threshing device and the threshing device laterally outside the machine body. In a combine that is configured to be able to swing with the lifting conveyor as a support shaft over a maintenance position that is away from the
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor ,
The lifting conveyor includes a discharge chute that guides the grain discharged from the upper discharge port to the outside of the machine body,
The shredding device for shredding the grain threshing from the threshing device from the threshing device, over the working position connected to the rear end of the threshing device and the maintenance position away from the rear end of the threshing device to the grain tank side, It is configured to be able to swing around the vertical axis,
In order to avoid interference between the first maintenance position where the separation mechanism of the grain tank from the threshing device is maximized, and the shredding device at the maintenance position and the discharge chute. The combine comprised so that the position maintenance of the said grain tank was attained to the 2nd maintenance position which set the separation distance from the said threshing apparatus of the said grain tank to the distance shorter than the said 1st maintenance position . A first member provided with an insertion hole in the up and down direction in either one of the lifting conveyor and the support column is provided,
A second member provided with a plurality of insertion holes facing the insertion holes by a swinging operation of the grain tank is disposed on the other of the lifting conveyor and the support column,
The combine according to claim 1 , wherein the holding mechanism is configured by the first member and the second member, and an insertion pin that is inserted through the opposing insertion holes. The rear part of the grain tank is connected to a lifting conveyor which is erected on the machine frame so as to be pivotable around the vertical axis, and the grain tank is connected to the work position adjacent to the threshing device and the threshing device laterally outside the machine body. In a combine that is configured to be able to swing with the lifting conveyor as a support shaft over a maintenance position that is away from the
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor,
A first member provided with an insertion hole in the up and down direction in either one of the lifting conveyor and the support column is provided,
A second member provided with a plurality of insertion holes facing the insertion holes by a swinging operation of the grain tank is disposed on the other of the lifting conveyor and the support column,
The combine which comprised the said holding mechanism from the said 1st member and the said 2nd member, and the insertion pin penetrated through those opposing penetration holes . The combine of Claim 2 or 3 provided with the boss | hub which forms the said insertion hole in at least any one of the said 1st member and the said 2nd member. The lifting conveyor is configured to be vertically removable with respect to a grain discharge case provided at the rear lower part of the grain tank,
A bolt connection between the first connecting part provided in the grain discharge case and the second connecting part provided in the lifting conveyor is configured to prevent the lifting conveyor from coming off with respect to the grain discharging case. ,
The said 1st member or said 2nd member arrange | positioned at the said conveyance conveyor is comprised so that it may be bolt-connected to the said conveyance conveyor with the bolt connection of the said 1st connection part and the said 2nd connection part . The combine according to any one of 4 . The combine according to claim 5 , wherein the support is provided with a stopper that limits a swing range of the grain tank by abutting with the second connecting portion provided in the lifting conveyor. The combine according to claim 6 , wherein the stopper is integrally formed with the first member or the second member arranged on the support column. In the state where the first member or the second member arranged on the lifting conveyor is in contact with the stopper, the insertion hole of the first member is from the threshing device of the grain tank in the second member. The combine of Claim 6 or 7 comprised so that it might oppose the insertion hole provided in the position corresponding to the maintenance position where the separation distance of this becomes the largest. The combine according to any one of claims 1 to 8, wherein the holding mechanism is configured to be capable of holding the position of the grain tank at a plurality of maintenance positions having different separation distances from the threshing device. The lifting conveyor is configured as a screw conveying type that lifts grains by rotating a lifting screw provided inside a cylindrical conveyor case,
The conveyor case is supported by an upper case portion having a discharge port for discharging the lifted grain and the upper case portion so that relative rotation about the rotation center of the lifting screw is possible. The combine according to any one of claims 1 to 9, comprising a side case portion. The rear part of the grain tank is connected to a lifting conveyor which is erected on the machine frame so as to be pivotable around the vertical axis, and the grain tank is connected to the work position adjacent to the threshing device and the threshing device laterally outside the machine body. In a combine that is configured to be able to swing with the lifting conveyor as a support shaft over a maintenance position that is away from the
A holding mechanism for holding the grain tank at the maintenance position across the support column and the lifting conveyor that are erected on the machine frame so as to support the lifting conveyor,
The lifting conveyor is configured as a screw conveying type that lifts grains by rotating a lifting screw provided inside a cylindrical conveyor case,
The conveyor case is supported by an upper case portion having a discharge port for discharging the lifted grain and the upper case portion so that relative rotation about the rotation center of the lifting screw is possible. Combine that consists of a side case. The combine according to claim 10 or 11 , wherein the upper case portion includes a discharge chute that guides the grain discharged from the discharge port to flow outward.

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