JP2014079222A - Grain discharge structure of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain discharge structure of a combine harvester favorably discharging grains stored in a grain tank, outside the combine harvester by a grain discharge device while simplifying a structure of the grain discharge device.SOLUTION: The grain discharge structure of the combine harvester comprises a grain discharge device 12 for discharging grains stored in a grain tank 11 from a rear part of the grain tank 11 to the outside of the combine harvester. The grain discharge device 12 includes a lift conveyor 16 at the rear part of the grain tank 11 for lifting grains in the grain tank and discharging them from an upper discharge port, and a discharge chute 17 for flowing down and guiding the grains discharged from the discharge port to the outward of the combine harvester. The discharge chute 17 is configured to change an inclination angle due to vertical swing, with the upper part side used as a fulcrum, at a discharge port side of the lift conveyor 16. The grain discharge structure further includes a mechanical linkage type operation mechanism 95 for allowing a vertical swinging operation of the discharge chute 17 from the front side of the grain tank 11.

Description

  The present invention relates to a combine grain discharging structure including a grain discharging device that discharges grains stored in a grain tank from the rear part of the grain tank to the outside of the machine.

  As a grain discharge structure for a combine, for example, in a grain discharge device, a discharge screw arranged in the front-rear direction at the bottom of a grain tank (grain tank) and a rear end of a discharge screw protruding backward from the grain tank A vertical auger of the screw auger of the horizontal auger in a state in which the screw conveyance type vertical auger having the lower end connected to the upper end of the vertical auger and a screw transfer type horizontal auger having one end connected to the upper end of the vertical auger can be interlocked with each other. Equipped with a swinging operation and a swinging swinging operation based on the connecting part of the horizontal auger, and a swing motor for swinging the horizontal auger and a hydraulic cylinder for swinging the lateral auger. There exists what comprised so that the grain stored in the tank might be discharged | emitted from the discharge port formed in the other end part (extension end part) of a horizontal auger to arbitrary discharge | emission locations outside a machine (for example, refer patent document 1). .

Japanese Patent Laying-Open No. 2011-67110 (paragraph numbers 0018, 0019 to 0022, FIGS. 1 and 2)

  In said structure, in order to raise the freedom degree of the selection of a grain discharge | emission location, the horizontal auger which conveys the grain lifted with the vertical auger to the grain discharge device, the conveyance direction of the grain by a horizontal auger A structure with a large number of parts is included in the grain discharging device because it has a swing motor that enables the change of the oil pressure and a hydraulic cylinder that enables the change of the discharge height of the grain discharged from the discharge port of the horizontal auger. Is complicated and large. Therefore, it takes time and cost to equip the grain discharging device, and the weight of the grain discharging device is increased.

  Furthermore, when working or moving without performing grain discharge, it is necessary to fix and hold a horizontal auger extending horizontally from the upper end of the vertical auger at a preset storage position. Since it is necessary to install a support member that supports the extended end side of the horizontal auger in the retracted position on the airframe, it is more laborious and costly to equip the grain discharging device. It was.

  The objective of this invention is enabling it to discharge | emit to the exterior by the grain discharging apparatus of the grain stored in the grain tank favorably, aiming at the simplification of the structure of a grain discharging apparatus.

The problem-solving means of the present invention is a combine grain discharging structure including a grain discharging device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine.
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
The discharge chute is configured such that, on the discharge port side of the transporting conveyor, the inclination angle can be changed by swinging up and down with the upper side as a fulcrum,
A mechanically linked operation mechanism that enables the discharge chute to swing up and down from the front of the grain tank is provided.

  According to this means, when the grain in the grain tank is discharged to a predetermined position outside the machine, after changing the inclination angle of the discharge chute so that the discharge chute is directed to the predetermined position, By transporting the grain by the transporting conveyor, the transported grain can be discharged from the upper discharge port, and the discharged grain is guided down to a predetermined position outside the machine body by the discharge chute. Can do. 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.

  In addition, when working or moving without performing grain discharge, for example, the discharge chute is lifted by changing the inclination angle of the discharge chute so that the discharge chute follows the conveyor. The overhang from the conveyor can be suppressed. As a result, it is possible to eliminate the need for a support structure for supporting the horizontal auger, which had to be equipped when the horizontal auger was employed, at the storage position.

  In addition, the swinging operation of the discharge chute for changing the inclination angle of the discharge chute can be performed from the front of the grain tank by the operation mechanism. And in a combine, since it is common to arrange a boarding operation part in the front position of a grain tank, a vertical swing operation of a discharge chute can be performed from a boarding operation part.

  Therefore, while simplifying the structure of the grain discharging device, reducing the weight, and reducing the cost, the operation of boarding the discharging of the grain stored in the grain tank to a predetermined position outside the aircraft by the grain discharging device It can be performed satisfactorily by operation from the section.

As one of the means for making the present invention more suitable,
With the vertical axis provided behind the grain tank as a fulcrum, the grain tank swings over a work position adjacent to the threshing device and a maintenance position where the threshing device is separated laterally outward from the machine, And it was comprised so that the said conveyance conveyor and the said discharge chute could move integrally with the said grain tank.

  According to this means, by swinging the grain tank to the maintenance position, a wide space can be ensured between the threshing apparatus and the grain tank which are adjacent to each other at the work position. This facilitates maintenance of the threshing device and the grain tank.

  Also, when the grain tank is swung, the lifting conveyor and the discharge chute move together with the grain tank. Therefore, when the grain tank is swung, the lifting conveyor or discharge is performed with respect to the grain tank. There is no need to separate the chutes, and it is possible to avoid the possibility that the grain tank may come into contact with the conveying conveyor or the discharge chute by swinging the grain tank.

  Therefore, it is possible to improve the operability when the grain tank is swung between the work position and the maintenance position while preventing the occurrence of inconvenience that the grain tank contacts the lifting conveyor or the discharge chute and is damaged. It is possible to improve the maintainability of the threshing device and the grain tank.

As one of the means for making the present invention more suitable,
The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
For the operation mechanism, a rotation shaft extending in the front-rear direction across the front and rear ends of the grain tank, an operation lever provided at the front end of the rotation shaft, and a discharge chute provided at the rear end of the rotation shaft The operation mechanism is configured such that the operation lever and the operation arm swing together through the rotation shaft.

  According to this means, when the operation lever is operated to swing, the operation arm for the discharge chute integrally swings with the operation lever via the rotation shaft, so that the discharge chute is swung up and down.

  Therefore, the swinging operation of the discharge chute can be favorably performed from the boarding operation unit with a simple and inexpensive configuration including the front and rear rotation shaft, the operation lever, and the discharge chute operation arm.

As one of the means for making the present invention more suitable,
The support shaft and the rotation shaft are arranged on the same axis.

  According to this means, when the discharge chute is swung up and down by swinging the operation lever, the control lever, the operation arm, and the discharge chute are smoothly swung with the same axis as a fulcrum and without being swung. Move.

  Accordingly, it is possible to improve the operability when the discharge chute is swung up and down by swinging the operation lever.

As one of the means for making the present invention more suitable,
The supporting shaft is integrally formed with the rotating shaft.

  According to this means, the configuration can be simplified and the cost can be reduced by reducing the number of parts. In addition, the pivot shaft serving as the pivot point for the operation lever and the operation arm and the support shaft of the discharge chute can be easily and reliably positioned on the same axis. The moving operation can be performed smoothly in a state without drowning.

  Accordingly, the vertical swing operation of the discharge chute by the operation lever can be smoothly performed while simplifying the configuration and reducing the cost.

As one of the means for making the present invention more suitable,
The operation mechanism is configured to include the operation lever, the operation arm, and the rotation shaft by bending a single member.

  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,
It was comprised so that the said rotating shaft might penetrate the said grain tank in the front-back direction.

  According to this means, the length of the rotation shaft extending between the operation lever and the operation arm can be minimized.

  Therefore, the configuration of the operation mechanism can be simplified.

As one of the means for making the present invention more suitable,
The operation mechanism is configured by an operation lever provided in a boarding operation unit located in front of the grain tank, and a linkage wire that links the operation lever to the discharge chute.

  According to this means, when the operation lever is swung, the discharge chute can be swung up and down via the linkage wire. In addition, the use of a connecting wire increases the degree of freedom in the routing of the operating mechanism, so that even when the grain tank is configured to be swingable between the working position and the maintenance position, the operating lever can be mounted. Can be deployed in the driving department.

  Accordingly, while the operation mechanism is configured simply and inexpensively from the operation lever and the connecting wire, the swinging operation of the discharge chute can be favorably performed from the boarding operation unit, and maintenance for the threshing device and the grain tank is performed. Can be improved.

As one of the means for making the present invention more suitable,
The operation lever is configured not to protrude outside the body.

  According to this means, it is possible to effectively prevent the occurrence of inconvenience that the operation lever comes into contact with other objects and damages during traveling.

As one of the means for making the present invention more suitable,
An urging means for urging the discharge chute upward is provided.

  According to this means, it is possible to reduce the operating force when swinging the discharge chute upward. In addition, when the discharge chute is swung downward, it is possible to prevent the inconvenience of the discharge chute falling and swinging rapidly.

  Accordingly, it is possible to improve the operability when the discharge chute is swung up and down by swinging the operation lever.

As one of the means for making the present invention more suitable,
A lock mechanism that enables the discharge chute to be fixed and held at an arbitrary inclination angle is provided.

  According to this means, when discharging the grain in the grain tank to a predetermined position outside the machine, after changing the inclination angle of the discharge chute so that the discharge chute is directed to the predetermined position, the lock mechanism The discharge chute can be fixedly held at the inclination angle.

  Therefore, the grain stored in the grain tank can be more easily and satisfactorily discharged to a predetermined position outside the machine by the grain discharging device.

As one of the means for making the present invention more suitable,
An inclination angle in which the lock mechanism is disposed in any one of the lifting conveyor and the discharging chute with a predetermined interval in the grain conveying direction of the lifting conveyor or the grain guiding direction of the discharging chute. The discharge chute is configured such that a plurality of engaged portions for setting, and the other one of the transporting conveyor and the discharge chute can be selectively engaged with the plurality of engaged portions. And a strut member deployed so that it can swing in the same direction as
A machine-linked locking operation mechanism that enables operation of the locking mechanism from the front of the grain tank is provided.

  According to this means, the lock mechanism can be configured simply and inexpensively from the plurality of engaged portions for setting the inclination angle and the tension member.

  Moreover, the lock mechanism can be operated from the front of the grain tank by the lock operation mechanism. And in a combine, since it is common to arrange a boarding operation part in the front position of a grain tank, operation of a lock mechanism can be performed from a boarding operation part.

  Accordingly, the discharge chute fixing operation and the fixing release operation at an arbitrary inclination angle by the lock mechanism can be favorably performed by operations from the boarding operation unit while simplifying the configuration of the lock mechanism and reducing the cost. it can.

As one of the means for making the present invention more suitable,
The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
The tension member is provided in the transporting conveyor,
The locking operation mechanism includes a front and rear locking rotation shaft extending from the front end portion of the grain tank to the tension member, and a locking operation lever provided at the front end portion of the rotation shaft, The operation mechanism is configured such that the lock operation lever and the tension member swing together through the lock rotation shaft.

  According to this means, when the lock operation lever is swung, the tension member swings integrally with the lock operation lever via the lock rotation shaft, and engages with any of the engaged portions. It switches to the state of releasing the engagement.

  Therefore, with a simple and inexpensive configuration consisting of a front and rear locking rotation shaft and a locking operation lever, the discharge mechanism can be fixed and released by the lock mechanism at an arbitrary inclination angle from the boarding driver. It can be done well by operation.

As one of the means for making the present invention more suitable,
The tension member, the lock rotation shaft, and the lock operation lever are integrally formed by bending a single member.

  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,
The lock operation mechanism is configured by a lock operation lever provided in a boarding operation unit located in front of the grain tank, and a lock link wire that links the lock operation lever to the tension member.

  According to this means, when the lock operation lever is swung, the tension member is swung via the lock link wire, so that the tension member is engaged with any of the engaged portions. And the state of releasing the engagement. In addition, by adopting the lock linking wire, the degree of freedom in the routing of the lock operating mechanism is increased, and even when the grain tank is configured to be swingable between the work position and the maintenance position, An operating lever for locking can be provided in the boarding operation section.

  Therefore, the lock operation mechanism can be easily and inexpensively configured from the lock operation lever and the lock connecting wire, and the discharge chute can be fixed and released from the boarding operation section at an arbitrary inclination angle by the lock mechanism. In addition to being able to perform well, the maintainability of the threshing device and the grain tank can be improved.

As one of the means for making the present invention more suitable,
The lock operation lever is configured not to protrude outward from the fuselage.

  According to this means, it is possible to effectively prevent the occurrence of inconvenience that the locking operation lever comes into contact with other objects and damages during traveling.

As one of the means for making the present invention more suitable,
The lock mechanism includes an urging unit that urges the tension member to swing upward.

  According to this means, when the locking member is swung up and down, the tension member is swung up and down to switch between the engaged state and the released state. The operating force can be reduced.

  Therefore, the operability when the discharge chute is fixed and released at an arbitrary inclination angle can be improved by swinging the lock operation lever.

As one of the means for making the present invention more suitable,
Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The discharge guide is configured to be able to change the opening area of the opening with respect to the discharge chute.

  According to this means, the grain discharged from the discharge port of the conveying conveyor can be reliably guided to the discharge chute disposed below the discharge port by the discharge guide.

  Moreover, the opening area of the opening part in a discharge guide can be changed according to the wetness etc. of the grain carried out from a grain tank. Thereby, for example, by increasing the opening area of the opening as the grain in the grain tank is wet, the grain is bridged at the opening of the discharge guide due to the wetting of the grain. Generation | occurrence | production of the disadvantage which accumulates and inhibits discharge | emission of a grain can be prevented.

  Therefore, the work efficiency at the time of discharging the grain of a grain tank can be aimed at.

As one of the problem solving means of the present invention,
In the grain discharge structure of a combine equipped with a grain discharge device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine,
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The discharge guide is configured to be able to change the opening area of the opening with respect to the discharge chute.

  According to this means, the grain discharged from the discharge port of the conveying conveyor can be reliably guided to the discharge chute disposed below the discharge port by the discharge guide, and the discharge chute can be used to place the kernel at a predetermined position outside the machine body. You can guide the flow down. 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.

  Moreover, the opening area of the opening part in a discharge guide can be changed according to the wetness etc. of the grain carried out from a grain tank. Thereby, for example, by increasing the opening area of the opening as the grain in the grain tank is wet, the grain is bridged at the opening of the discharge guide due to the wetting of the grain. Generation | occurrence | production of the disadvantage which accumulates and inhibits discharge | emission of a grain can be prevented.

  Therefore, while simplifying the structure of the grain discharging device, reducing the weight, and reducing costs, the grain stored in the grain tank is discharged to a predetermined position outside the machine by the grain discharging device. be able to. Moreover, the work efficiency at the time of discharging | emitting the grain of a grain tank can be improved irrespective of the wet condition etc. of a grain.

As one of the means for making the present invention more suitable,
The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so that the position of the lifting conveyor can be changed in the grain discharging direction of the lifting conveyor. The opening area of the opening is changed by changing the connecting position of the movable part with respect to the fixed part.

  According to this means, the opening area of the opening can be changed according to the wetness of the grain and the like by a simple operation of changing the connecting position of the movable part with respect to the fixed part in the grain discharging direction.

  Therefore, while reducing the effort required to change the opening area of the opening, the grain accumulates in a bridge shape in the opening of the discharge guide due to the wetness of the grain, and inhibits the discharge of the grain. It is possible to prevent the occurrence of inconvenience.

As one of the means for making the present invention more suitable,
The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so as to be swingable in the grain discharging direction of the lifting conveyor. In the discharging state in which the grain is discharged from the discharge port, the opening of the opening is reduced by the amount of the grain discharged from the discharge port as the movable part swings upon receiving the pressing of the grain from the discharge port. In the discharge stop state in which the grain is not discharged from the outlet, the movable portion does not receive the pressing of the grain from the outlet, so that the opening area of the opening is minimized. Configured.

  According to this means, the opening area of the opening can be automatically changed by the movable part swinging in response to the pressing of the grain from the outlet.

  Therefore, there is no need to change the opening area of the opening, and due to the wetting of the grain, the grain accumulates in a bridge shape at the opening of the discharge guide, and the inconvenience of inhibiting the discharge of the grain Can be prevented.

As one of the means for making the present invention more suitable,
The discharge guide is provided with a biasing means for swinging and biasing the movable part in a direction of narrowing the opening area of the opening.

  According to this means, it is possible to prevent the movable portion from receiving the pressing of the grain from the outlet and unnecessarily increasing the opening area of the opening.

  Therefore, the leakage of the grain from the opening due to the unnecessarily large opening area of the opening can be prevented.

As one of the means for making the present invention more suitable,
In a state where the opening area of the opening portion is minimized, the movable portion is configured not to protrude outward from the body.

  According to this means, when the grain is not discharged from the grain tank, the discharge guide is brought into contact with other objects during work traveling or traveling by minimizing the opening area of the opening. Occurrence of inconvenience of damage can be prevented.

As one of the means for making the present invention more suitable,
At least the upper side of the discharge chute is formed into a groove shape including a bottom plate and a pair of side plates rising from the bottom plate,
The grain discharging apparatus includes a cover body that covers the upper side of the discharge chute from above from the upper part of the transporting conveyor to the discharge chute.

  According to this means, when the clogging of the grain occurs on the upper side of the discharge chute, etc., the cover body is removed, and the clogged grain is inserted below the discharge chute by the hand inserted from the open part of the discharge chute. It can be easily swept away.

  In addition, the cover body has the disadvantage that the grain jumps out from the upper part of the discharge chute when the grain flows from the discharge port toward the discharge chute, which is likely to occur by forming the upper part of the discharge chute into a groove shape. Can be prevented.

  Therefore, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute and to prevent a reduction in the grain recovery rate due to the grain jumping out from the upper part of the discharge chute.

As one of the means for making the present invention more suitable,
The cover body was attached to the upper part of the transporting conveyor so as to swing up and down.

  According to this means, the cover body can be swung in the same direction as the discharge chute as the discharge chute is swung up and down. Thereby, a clearance gap is formed between the discharge chute and the cover body by the vertical swing operation of the discharge chute, and it is possible to avoid the risk that the grain leaks from the clearance.

  Therefore, it is possible to prevent a reduction in the grain recovery rate due to the leakage of the grain from the gap between the discharge chute and the cover body.

As one of the means for making the present invention more suitable,
The discharge chute comprises an upper chute portion that constitutes the upper side of the grain direction of the discharge chute, and a lower chute portion that constitutes the lower side of the grain direction of the discharge chute,
Fitting the lower chute part slidably in the grain guide direction with respect to the upper chute part,
A lock mechanism for adjusting the chute length that enables the lower chute portion to be fixed and held at an arbitrary sliding position with respect to the upper chute portion is provided.

  According to this means, in addition to the change of the inclination angle of the discharge chute, the length of the discharge chute in the grain discharge direction can be changed. Thereby, it becomes possible to finely adjust the grain discharge position, and the grain discharge position by the discharge chute can be easily changed to a more appropriate position with respect to the grain discharge position.

  Therefore, the grain can be discharged by the discharge chute in a good state suitable for the grain discharge location.

As one of the means for making the present invention more suitable,
The lock mechanism for adjusting the chute length has a plurality of recesses formed at a predetermined interval on either the upper chute portion or the lower chute portion and arranged in the grain guiding direction of the discharge chute. A saw blade-like swinging arm arranged in this manner, and an engaging part arranged to selectively engage with the plurality of recesses on the other side of the upper-side chute part and the lower-side chute part And consisted of

  According to this means, the lock mechanism for adjusting the chute length can be configured simply and inexpensively from the saw blade-like swing arm and the engaging portion.

  Accordingly, it is possible to simplify the configuration of the lock mechanism for adjusting the chute length and reduce the cost.

As one of the means for making the present invention more suitable,
The lock mechanism for adjusting the chute length is provided with a biasing means for biasing the swing arm.

  According to this means, it is possible to easily and reliably maintain the saw-toothed swing arm in the engaged state with the engaging portion by the biasing means.

  Therefore, the length of the discharge chute can be easily and reliably adjusted.

As one of the means for making the present invention more suitable,
The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
On the upper side end of the lower-side chute part in the grain guide direction, an upper-side connecting rod connecting the upper sides of the pair of side plates is provided,
The upper side connecting rod is configured to serve also as the engaging portion.

  According to this means, when the discharge chute is formed in the groove shape, when the clogging of the grain occurs in the discharge chute, it becomes possible to detect the clogging at an early stage visually. Moreover, the clogged grain can be easily swept down toward the lower side of the discharge chute with the hand inserted from the open part of the discharge chute.

  And the deformation | transformation of the discharge chute which becomes easy to produce because the discharge chute was formed in the groove | channel type | mold can be suppressed by the upper side connection rod. Further, since the upper side connecting rod also serves as an engaging portion of the lock mechanism for adjusting the chute length, the number of parts in the lock mechanism for adjusting the chute length can be reduced.

  Therefore, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute and to simplify the configuration and reduce the cost by reducing the number of parts while suppressing the deformation of the discharge chute.

As one of the means for making the present invention more suitable,
The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
The lower side chute | shoot part was equipped with the lower side connection hook which connects those upper side over the pair of side plate in the grain guidance direction lower end part.

  According to this means, when the discharge chute is formed in the groove shape, when the clogging of the grain occurs in the discharge chute, it becomes possible to detect the clogging at an early stage visually. Moreover, the clogged grain can be easily swept down toward the lower side of the discharge chute with the hand inserted from the open part of the discharge chute.

  And the deformation | transformation of the discharge chute which becomes easy to produce because the discharge chute was formed in the groove shape can be suppressed by the lower side connecting rod. When the lower chute is slid with respect to the upper chute, the lower connecting rod can be used as a gripping part, which makes it easier to slide the lower chute. Become.

  Accordingly, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute, and to improve the operability when adjusting the length of the discharge chute while suppressing the deformation of the 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 a combine grain discharging structure according to the present invention is applied to a self-decomposing 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 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 at the rear end of the grain carrying-out part 11B, the grain outlet 11E which enables taking out of the grain stored in the grain tank 11 out of the grain tank is formed.

  As shown in FIGS. 1-10, the grain discharge apparatus 12 is located in the grain carrying-out part 11B, the carrying-out screw 15 and carrying-out screw which carry out the grain in a grain tank out of the tank from the grain extraction outlet 11E. 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 portion 11B in the front-rear direction so as to be located inside the grain discharge case 18 connected to the rear end of the bottom 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 arranged at a position directly below the discharge guide 27 in the conveyor case 21 so that the grain guided by the discharge guide 27 flows down to the right outside 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 the upper region facing the discharge port 16 </ b> A and the upper side of the lifting screw 23. 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 that they cannot rotate relative to each other.

  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's 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 16A 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 63 inserted into the insertion holes 62a to 62c facing each other of the first member 61 and the second member 62, Etc.

  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 portion 33 that is externally connected to each other, a tension spring 34 as a biasing means 34 that swings and biases the movable portion 32 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 that the discharge chute 17 is swung up and down. 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.

  Furthermore, by providing the lower chute portion 17A 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 a rotation shaft 95 by a discharge chute operation arm 98 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 combine grain discharging structure according to the present invention is applied to a self-decomposing 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 locking mechanism 17D engages the hook member 17h provided to the upper chute portion 17A so as to swing up and down, the engagement pin 17i provided laterally to the lower chute portion 17B, and the hook member 17h to the engagement pin 17c. 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 the grain discharging device 12, instead of the configuration provided in the bottom 11B of the grain tank 11 with a carry-out screw 15 for carrying the grain stored in the grain tank 11 out of the tank from the grain outlet 11E, The bottom 11B of the grain tank 11 is configured to have an inclined surface that guides the grain stored in the grain tank 11 from the grain outlet 11E to the outside of the tank, or the bottom 11B of the grain tank 11 The grain stored in the grain tank 11 may be fluidly guided from the grain outlet 11E to the outside of the tank.

[3] As the grain discharging device 12, a discharge port 16A is formed on the upper rear side of the lifting conveyor 16, a discharging chute 17 is provided on the rear side which is the discharging port side of the lifting conveyor 16, and a bottom plate 17A is provided. It is possible to change the inclination angle by swinging up and down around a horizontal support shaft 40 that is horizontally oriented in a state where the grain tank 11 is located at the working position in a state facing the rear portion of the lifting conveyor 16. It may be configured as follows.

[4] As the grain discharging device 12, a discharge port 16A is formed on the upper rear side of the lifting conveyor 16, a discharging chute 17 is provided on the rear side which is the discharging port side of the lifting conveyor 16, and a side plate 17B is provided on the side plate 17B. It is possible to change the inclination angle by swinging up and down with a laterally supporting shaft 40 which is oriented in the front-rear direction when the grain tank 11 is located at the working position in a state facing the rear part of the lifting conveyor 16. It may be configured as follows.

[5] As shown in FIG. 16, the grain discharging device 12 includes a lower case portion 21 </ b> F that supports the cylindrical conveyor case 21 in the transporting conveyor 16 by the second support column 24, and the lower case. The upper case portion 21G is fitted with a discharge guide 27 and a discharge chute 17 so that the upper case portion 21G can be rotated relative to the portion 21F. You may comprise so that the rocking | fluctuation operation which made the vertical axis X which passes through a fulcrum possible is possible.
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.

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

[7] 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.

[8] As the operation mechanism 95 for the discharge chute, the link wire bypasses the grain tank 11 from the operation lever 97 provided in the boarding operation unit 4 and the link wire that links the control lever 97 to the discharge chute 17. It may be configured as described above.

[9] A discharge chute operating mechanism 95 includes a front-rear rotation shaft 96, an operation lever 97 provided at the front end of the rotation shaft 96, and a discharge chute provided at the rear end of the rotation shaft 96. In this case, the pivot shaft 96 may be configured to pass above or laterally outward of the grain tank 11.

[10] As shown in FIG. 17, as the operation mechanism 95 for the discharge chute, the rotating shaft 96 and the operation arm 98 are integrally formed by bending a single round bar steel material or a round pipe material. The seventeen support shafts 40 may be configured not to be integrally formed with the rotation shaft 96 and the operation arm 98.
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. May be.

[11] As the operation mechanism 95 for the discharge chute, the rotating shaft 96 and the operating lever 97 are integrally formed by bending a single round bar steel material or a round pipe material. The operation arm 98 may be configured to be detachably connected. Further, the operating lever 97 and the operating arm 98 may be detachably connected to the rotating shaft 96. Further, the rotating shaft 96, the operation lever 97, and the operation arm 98 may be integrally formed by bending a single round bar steel material or a round pipe material.

[12] The operation lever 97 may be configured not to protrude outward from the outer end of the machine body when the discharge chute 17 is positioned at the retracted position.

[13] A tension spring or a compression spring may be employed as the biasing means 100 that swings and biases the discharge chute 17 upward.

[14] As the lock mechanism 41 for adjusting the chute angle, a plurality of engaged portions 42 a to 42 c for setting an inclination angle are provided on the lifting conveyor 16 at predetermined intervals in the grain conveying direction of the lifting conveyor 16. By deploying a tension member 43 that selectively engages with the plurality of engaged portions 42 a to 42 c by swinging in the same direction as the discharge chute 17. It may be configured.

[15] The lock mechanism 41 for adjusting the chute angle includes a plurality of recessed portions provided in the front end portion of the grain tank 11 or the boarding operation portion 4 in a state in which the lock mechanism 41 can selectively engage with the operation lever 97. It may be configured.

[16] The lock operation mechanism 101 includes a lock operation lever 103 provided in the boarding operation unit 4 and a lock connection wire that links the lock operation lever 103 to the tension member 43. It may be configured to bypass the grain tank 11.

[17] When the locking operation mechanism 101 includes the front and rear locking rotation shafts 102 and the locking operation lever 103 provided at the front end of the rotation shaft 96, the locking rotation shaft 96 is provided. May be configured to pass laterally outward of the grain tank 11.

[18] As the lock operation mechanism 101, the lock rotation shaft 102 and the lock operation lever 103 are integrally formed by bending a single round bar steel material or a round pipe material. It may be configured such that the stretching member 43 is detachably connected to the rear end portion. Further, a structure in which the tension member 43 and the lock operation lever 103 are detachably connected to the lock rotation shaft 102 may be used. Further, the tension member 43, the lock rotation shaft 102, and the lock operation lever 103 may be integrally formed by bending a single round bar steel material or a round pipe material.

[19] The locking operation lever 103 may be configured not to protrude outward from the outer end of the machine body when the discharge chute 17 is positioned at the retracted position.

[20] A tension spring or a compression spring may be employed as the urging means 44 that urges the tension member 43 to swing upward.

[21] A case where the discharge guide 27 is constituted by a fixed portion 31 fixed to the lifting conveyor 16 and a movable portion 33 externally connected to the fixed portion 31 so as to be swingable in the grain discharging direction of the lifting conveyor 16. In the discharge stop state in which the grain is not discharged from the discharge port 16A, the opening area of the opening 27A may be minimized by the weight of the movable portion 33.

[22] A torsion spring or a compression spring may be employed as the biasing means 34 that swings and biases the movable portion 33 in the direction of narrowing the opening area of the opening 27A.

[23] As the lock mechanism 90 for adjusting the chute length, the lower chute portion 17B may be equipped with a dedicated engaging portion 17d that selectively engages with the plurality of concave portions 92a.

[24] As the lock mechanism 90 for adjusting the chute length, a plurality of recesses 92a formed at predetermined intervals on the lower chute 17B that is externally fitted to the upper chute 17A is a grain guide for the discharge chute 17. It has a saw blade-like swing arm 92 arranged so as to be aligned in the direction, and is configured by disposing an engaging portion 17d that selectively engages with the plurality of concave portions 92a on the upper chute portion 17A. It may be a thing.

[25] As the biasing means 93 for biasing the swing arm 92, a tension spring or a compression spring may be employed.

  The grain discharge structure of the combine according to the present invention can be applied to a self-removal type or whole-pile type type combine equipped with a grain tank.

DESCRIPTION OF SYMBOLS 4 Boarding operation part 6 Threshing apparatus 11 Grain tank 12 Grain discharge apparatus 16 Lifting conveyor 16A Discharge port 17 Discharge chute 17A Upper side chute part 17B Lower side chute part 17a Bottom plate 17b Side plate 17d Engagement part (upper side connection rod)
17e Lower side connecting rod 27 Discharge guide 27A Opening portion 28 Fixed portion 29 Movable portion 31 Fixed portion 33 Movable portion 34 Energizing means 40 Lateral support shaft 41 Lock mechanism 42a Engaged portion 42b Engaged portion 42c Engaged portion 43 Stretching member 44 Energizing means 51 Cover body 90 Locking mechanism for adjusting the chute length 92 Swing arm 92a Recessed portion 93 Energizing means 95 Mechanically linked operation mechanism 96 Front / rear rotating shaft 97 Operating lever 98 For discharge chute Operation arm 100 Energizing means 101 Mechanically linked locking operation mechanism 102 Front-rear locking rotation shaft 103 Locking operation lever X Vertical axis

  The present invention relates to a combine grain discharging structure including a grain discharging device that discharges grains stored in a grain tank from the rear part of the grain tank to the outside of the machine.

  As a grain discharge structure for a combine, for example, in a grain discharge device, a discharge screw arranged in the front-rear direction at the bottom of a grain tank (grain tank) and a rear end of a discharge screw protruding backward from the grain tank A vertical auger of the screw auger of the horizontal auger in a state in which the screw conveyance type vertical auger having the lower end connected to the upper end of the vertical auger and a screw transfer type horizontal auger having one end connected to the upper end of the vertical auger can be interlocked with each other. Equipped with a swinging operation and a swinging swinging operation based on the connecting part of the horizontal auger, and a swing motor for swinging the horizontal auger and a hydraulic cylinder for swinging the lateral auger. There exists what comprised so that the grain stored in the tank might be discharged | emitted from the discharge port formed in the other end part (extension end part) of a horizontal auger to arbitrary discharge | emission locations outside a machine (for example, refer patent document 1). .

Japanese Patent Laying-Open No. 2011-67110 (paragraph numbers 0018, 0019 to 0022, FIGS. 1 and 2)

  In said structure, in order to raise the freedom degree of the selection of a grain discharge | emission location, the horizontal auger which conveys the grain lifted with the vertical auger to the grain discharge device, the conveyance direction of the grain by a horizontal auger A structure with a large number of parts is included in the grain discharging device because it has a swing motor that enables the change of the oil pressure and a hydraulic cylinder that enables the change of the discharge height of the grain discharged from the discharge port of the horizontal auger. Is complicated and large. Therefore, it takes time and cost to equip the grain discharging device, and the weight of the grain discharging device is increased.

  Furthermore, when working or moving without performing grain discharge, it is necessary to fix and hold a horizontal auger extending horizontally from the upper end of the vertical auger at a preset storage position. Since it is necessary to install a support member that supports the extended end side of the horizontal auger in the retracted position on the airframe, it is more laborious and costly to equip the grain discharging device. It was.

  The objective of this invention is enabling it to discharge | emit to the exterior by the grain discharging apparatus of the grain stored in the grain tank favorably, aiming at the simplification of the structure of a grain discharging apparatus.

The problem-solving means of the present invention is a combine grain discharging structure including a grain discharging device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine.
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
The discharge chute is configured such that, on the discharge port side of the transporting conveyor, the inclination angle can be changed by swinging up and down with the upper side as a fulcrum,
A mechanically linked operation mechanism that enables the discharge chute to swing up and down from the front of the grain tank is provided.

  According to this means, when the grain in the grain tank is discharged to a predetermined position outside the machine, after changing the inclination angle of the discharge chute so that the discharge chute is directed to the predetermined position, By transporting the grain by the transporting conveyor, the transported grain can be discharged from the upper discharge port, and the discharged grain is guided down to a predetermined position outside the machine body by the discharge chute. Can do. 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.

  In addition, when working or moving without performing grain discharge, for example, the discharge chute is lifted by changing the inclination angle of the discharge chute so that the discharge chute follows the conveyor. The overhang from the conveyor can be suppressed. As a result, it is possible to eliminate the need for a support structure for supporting the horizontal auger, which had to be equipped when the horizontal auger was employed, at the storage position.

  In addition, the swinging operation of the discharge chute for changing the inclination angle of the discharge chute can be performed from the front of the grain tank by the operation mechanism. And in a combine, since it is common to arrange a boarding operation part in the front position of a grain tank, a vertical swing operation of a discharge chute can be performed from a boarding operation part.

  Therefore, while simplifying the structure of the grain discharging device, reducing the weight, and reducing the cost, the operation of boarding the discharging of the grain stored in the grain tank to a predetermined position outside the aircraft by the grain discharging device It can be performed satisfactorily by operation from the section.

As one of the means for making the present invention more suitable,
With the vertical axis provided behind the grain tank as a fulcrum, the grain tank swings over a work position adjacent to the threshing device and a maintenance position where the threshing device is separated laterally outward from the machine, And it was comprised so that the said conveyance conveyor and the said discharge chute could move integrally with the said grain tank.

  According to this means, by swinging the grain tank to the maintenance position, a wide space can be ensured between the threshing apparatus and the grain tank which are adjacent to each other at the work position. This facilitates maintenance of the threshing device and the grain tank.

  Also, when the grain tank is swung, the lifting conveyor and the discharge chute move together with the grain tank. Therefore, when the grain tank is swung, the lifting conveyor or discharge is performed with respect to the grain tank. There is no need to separate the chutes, and it is possible to avoid the possibility that the grain tank may come into contact with the conveying conveyor or the discharge chute by swinging the grain tank.

  Therefore, it is possible to improve the operability when the grain tank is swung between the work position and the maintenance position while preventing the occurrence of inconvenience that the grain tank contacts the lifting conveyor or the discharge chute and is damaged. It is possible to improve the maintainability of the threshing device and the grain tank.

As one of the means for making the present invention more suitable,
The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
For the operation mechanism, a rotation shaft extending in the front-rear direction across the front and rear ends of the grain tank, an operation lever provided at the front end of the rotation shaft, and a discharge chute provided at the rear end of the rotation shaft The operation mechanism is configured such that the operation lever and the operation arm swing together through the rotation shaft.

  According to this means, when the operation lever is operated to swing, the operation arm for the discharge chute integrally swings with the operation lever via the rotation shaft, so that the discharge chute is swung up and down.

  Therefore, the swinging operation of the discharge chute can be favorably performed from the boarding operation unit with a simple and inexpensive configuration including the front and rear rotation shaft, the operation lever, and the discharge chute operation arm.

As one of the means for making the present invention more suitable,
The support shaft and the rotation shaft are arranged on the same axis.

  According to this means, when the discharge chute is swung up and down by swinging the operation lever, the control lever, the operation arm, and the discharge chute are smoothly swung with the same axis as a fulcrum and without being swung. Move.

  Accordingly, it is possible to improve the operability when the discharge chute is swung up and down by swinging the operation lever.

As one of the means for making the present invention more suitable,
The supporting shaft is integrally formed with the rotating shaft.

  According to this means, the configuration can be simplified and the cost can be reduced by reducing the number of parts. In addition, the pivot shaft serving as the pivot point for the operation lever and the operation arm and the support shaft of the discharge chute can be easily and reliably positioned on the same axis. The moving operation can be performed smoothly in a state without drowning.

  Accordingly, the vertical swing operation of the discharge chute by the operation lever can be smoothly performed while simplifying the configuration and reducing the cost.

As one of the means for making the present invention more suitable,
The operation mechanism is configured to include the operation lever, the operation arm, and the rotation shaft by bending a single member.

  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,
It was comprised so that the said rotating shaft might penetrate the said grain tank in the front-back direction.

  According to this means, the length of the rotation shaft extending between the operation lever and the operation arm can be minimized.

  Therefore, the configuration of the operation mechanism can be simplified.

As one of the means for making the present invention more suitable,
The operation mechanism is configured by an operation lever provided in a boarding operation unit located in front of the grain tank, and a linkage wire that links the operation lever to the discharge chute.

  According to this means, when the operation lever is swung, the discharge chute can be swung up and down via the linkage wire. In addition, the use of a connecting wire increases the degree of freedom in the routing of the operating mechanism, so that even when the grain tank is configured to be swingable between the working position and the maintenance position, the operating lever can be mounted. Can be deployed in the driving department.

  Accordingly, while the operation mechanism is configured simply and inexpensively from the operation lever and the connecting wire, the swinging operation of the discharge chute can be favorably performed from the boarding operation unit, and maintenance for the threshing device and the grain tank is performed. Can be improved.

As one of the means for making the present invention more suitable,
The operation lever is configured not to protrude outside the body.

  According to this means, it is possible to effectively prevent the occurrence of inconvenience that the operation lever comes into contact with other objects and damages during traveling.

As one of the means for making the present invention more suitable,
An urging means for urging the discharge chute upward is provided.

  According to this means, it is possible to reduce the operating force when swinging the discharge chute upward. In addition, when the discharge chute is swung downward, it is possible to prevent the inconvenience of the discharge chute falling and swinging rapidly.

  Accordingly, it is possible to improve the operability when the discharge chute is swung up and down by swinging the operation lever.

As one of the means for making the present invention more suitable,
A lock mechanism that enables the discharge chute to be fixed and held at an arbitrary inclination angle is provided.

  According to this means, when discharging the grain in the grain tank to a predetermined position outside the machine, after changing the inclination angle of the discharge chute so that the discharge chute is directed to the predetermined position, the lock mechanism The discharge chute can be fixedly held at the inclination angle.

  Therefore, the grain stored in the grain tank can be more easily and satisfactorily discharged to a predetermined position outside the machine by the grain discharging device.

As one of the means for making the present invention more suitable,
An inclination angle in which the lock mechanism is disposed in any one of the lifting conveyor and the discharging chute with a predetermined interval in the grain conveying direction of the lifting conveyor or the grain guiding direction of the discharging chute. The discharge chute is configured such that a plurality of engaged portions for setting, and the other one of the transporting conveyor and the discharge chute can be selectively engaged with the plurality of engaged portions. And a strut member deployed so that it can swing in the same direction as
A machine-linked locking operation mechanism that enables operation of the locking mechanism from the front of the grain tank is provided.

  According to this means, the lock mechanism can be configured simply and inexpensively from the plurality of engaged portions for setting the inclination angle and the tension member.

  Moreover, the lock mechanism can be operated from the front of the grain tank by the lock operation mechanism. And in a combine, since it is common to arrange a boarding operation part in the front position of a grain tank, operation of a lock mechanism can be performed from a boarding operation part.

  Accordingly, the discharge chute fixing operation and the fixing release operation at an arbitrary inclination angle by the lock mechanism can be favorably performed by operations from the boarding operation unit while simplifying the configuration of the lock mechanism and reducing the cost. it can.

As one of the means for making the present invention more suitable,
The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
The tension member is provided in the transporting conveyor,
The locking operation mechanism includes a front and rear locking rotation shaft extending from the front end portion of the grain tank to the tension member, and a locking operation lever provided at the front end portion of the rotation shaft, The operation mechanism is configured such that the lock operation lever and the tension member swing together through the lock rotation shaft.

  According to this means, when the lock operation lever is swung, the tension member swings integrally with the lock operation lever via the lock rotation shaft, and engages with any of the engaged portions. It switches to the state of releasing the engagement.

  Therefore, with a simple and inexpensive configuration consisting of a front and rear locking rotation shaft and a locking operation lever, the discharge mechanism can be fixed and released by the lock mechanism at an arbitrary inclination angle from the boarding driver. It can be done well by operation.

As one of the means for making the present invention more suitable,
The tension member, the lock rotation shaft, and the lock operation lever are integrally formed by bending a single member.

  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,
The lock operation mechanism is configured by a lock operation lever provided in a boarding operation unit located in front of the grain tank, and a lock link wire that links the lock operation lever to the tension member.

  According to this means, when the lock operation lever is swung, the tension member is swung via the lock link wire, so that the tension member is engaged with any of the engaged portions. And the state of releasing the engagement. In addition, by adopting the lock linking wire, the degree of freedom in the routing of the lock operating mechanism is increased, and even when the grain tank is configured to be swingable between the work position and the maintenance position, An operating lever for locking can be provided in the boarding operation section.

  Therefore, the lock operation mechanism can be easily and inexpensively configured from the lock operation lever and the lock connecting wire, and the discharge chute can be fixed and released from the boarding operation section at an arbitrary inclination angle by the lock mechanism. In addition to being able to perform well, the maintainability of the threshing device and the grain tank can be improved.

As one of the means for making the present invention more suitable,
The lock operation lever is configured not to protrude outward from the fuselage.

  According to this means, it is possible to effectively prevent the occurrence of inconvenience that the locking operation lever comes into contact with other objects and damages during traveling.

As one of the means for making the present invention more suitable,
The lock mechanism includes an urging unit that urges the tension member to swing upward.

  According to this means, when the locking member is swung up and down, the tension member is swung up and down to switch between the engaged state and the released state. The operating force can be reduced.

  Therefore, the operability when the discharge chute is fixed and released at an arbitrary inclination angle can be improved by swinging the lock operation lever.

As one of the means for making the present invention more suitable,
Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The discharge guide is configured to be able to change the opening area of the opening with respect to the discharge chute.

  According to this means, the grain discharged from the discharge port of the conveying conveyor can be reliably guided to the discharge chute disposed below the discharge port by the discharge guide.

  Moreover, the opening area of the opening part in a discharge guide can be changed according to the wetness etc. of the grain carried out from a grain tank. Thereby, for example, by increasing the opening area of the opening as the grain in the grain tank is wet, the grain is bridged at the opening of the discharge guide due to the wetting of the grain. Generation | occurrence | production of the disadvantage which accumulates and inhibits discharge | emission of a grain can be prevented.

  Therefore, the work efficiency at the time of discharging the grain of a grain tank can be aimed at.

As one of the problem solving means of the present invention,
In the grain discharge structure of a combine equipped with a grain discharge device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine,
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The discharge guide is configured to be able to change the opening area of the opening with respect to the discharge chute.

  According to this means, the grain discharged from the discharge port of the conveying conveyor can be reliably guided to the discharge chute disposed below the discharge port by the discharge guide, and the discharge chute can be used to place the kernel at a predetermined position outside the machine body. You can guide the flow down. 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.

  Moreover, the opening area of the opening part in a discharge guide can be changed according to the wetness etc. of the grain carried out from a grain tank. Thereby, for example, by increasing the opening area of the opening as the grain in the grain tank is wet, the grain is bridged at the opening of the discharge guide due to the wetting of the grain. Generation | occurrence | production of the disadvantage which accumulates and inhibits discharge | emission of a grain can be prevented.

  Therefore, while simplifying the structure of the grain discharging device, reducing the weight, and reducing costs, the grain stored in the grain tank is discharged to a predetermined position outside the machine by the grain discharging device. be able to. Moreover, the work efficiency at the time of discharging | emitting the grain of a grain tank can be improved irrespective of the wet condition etc. of a grain.

As one of the means for making the present invention more suitable,
The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so that the position of the lifting conveyor can be changed in the grain discharging direction of the lifting conveyor. The opening area of the opening is changed by changing the connecting position of the movable part with respect to the fixed part.

  According to this means, the opening area of the opening can be changed according to the wetness of the grain and the like by a simple operation of changing the connecting position of the movable part with respect to the fixed part in the grain discharging direction.

  Therefore, while reducing the effort required to change the opening area of the opening, the grain accumulates in a bridge shape in the opening of the discharge guide due to the wetness of the grain, and inhibits the discharge of the grain. It is possible to prevent the occurrence of inconvenience.

As one of the means for making the present invention more suitable,
The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so as to be swingable in the grain discharging direction of the lifting conveyor. In the discharging state in which the grain is discharged from the discharge port, the opening of the opening is reduced by the amount of the grain discharged from the discharge port as the movable part swings upon receiving the pressing of the grain from the discharge port. In the discharge stop state in which the grain is not discharged from the outlet, the movable portion does not receive the pressing of the grain from the outlet, so that the opening area of the opening is minimized. Configured.

  According to this means, the opening area of the opening can be automatically changed by the movable part swinging in response to the pressing of the grain from the outlet.

  Therefore, there is no need to change the opening area of the opening, and due to the wetting of the grain, the grain accumulates in a bridge shape at the opening of the discharge guide, and the inconvenience of inhibiting the discharge of the grain Can be prevented.

As one of the means for making the present invention more suitable,
The discharge guide is provided with a biasing means for swinging and biasing the movable part in a direction of narrowing the opening area of the opening.

  According to this means, it is possible to prevent the movable portion from receiving the pressing of the grain from the outlet and unnecessarily increasing the opening area of the opening.

  Therefore, the leakage of the grain from the opening due to the unnecessarily large opening area of the opening can be prevented.

As one of the means for making the present invention more suitable,
In a state where the opening area of the opening portion is minimized, the movable portion is configured not to protrude outward from the body.

  According to this means, when the grain is not discharged from the grain tank, the discharge guide is brought into contact with other objects during work traveling or traveling by minimizing the opening area of the opening. Occurrence of inconvenience of damage can be prevented.

As one of the means for making the present invention more suitable,
At least the upper side of the discharge chute is formed into a groove shape including a bottom plate and a pair of side plates rising from the bottom plate,
The grain discharging apparatus includes a cover body that covers the upper side of the discharge chute from above from the upper part of the transporting conveyor to the discharge chute.

  According to this means, when the clogging of the grain occurs on the upper side of the discharge chute, etc., the cover body is removed, and the clogged grain is inserted below the discharge chute by the hand inserted from the open part of the discharge chute. It can be easily swept away.

  In addition, the cover body has the disadvantage that the grain jumps out from the upper part of the discharge chute when the grain flows from the discharge port toward the discharge chute, which is likely to occur by forming the upper part of the discharge chute into a groove shape. Can be prevented.

  Therefore, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute and to prevent a reduction in the grain recovery rate due to the grain jumping out from the upper part of the discharge chute.

As one of the means for making the present invention more suitable,
The cover body was attached to the upper part of the transporting conveyor so as to swing up and down.

  According to this means, the cover body can be swung in the same direction as the discharge chute as the discharge chute is swung up and down. Thereby, a clearance gap is formed between the discharge chute and the cover body by the vertical swing operation of the discharge chute, and it is possible to avoid the risk that the grain leaks from the clearance.

  Therefore, it is possible to prevent a reduction in the grain recovery rate due to the leakage of the grain from the gap between the discharge chute and the cover body.

As one of the means for making the present invention more suitable,
The discharge chute comprises an upper chute portion that constitutes the upper side of the grain direction of the discharge chute, and a lower chute portion that constitutes the lower side of the grain direction of the discharge chute,
Fitting the lower chute part slidably in the grain guide direction with respect to the upper chute part,
A lock mechanism for adjusting the chute length that enables the lower chute portion to be fixed and held at an arbitrary sliding position with respect to the upper chute portion is provided.

  According to this means, in addition to the change of the inclination angle of the discharge chute, the length of the discharge chute in the grain discharge direction can be changed. Thereby, it becomes possible to finely adjust the grain discharge position, and the grain discharge position by the discharge chute can be easily changed to a more appropriate position with respect to the grain discharge position.

  Therefore, the grain can be discharged by the discharge chute in a good state suitable for the grain discharge location.

As one of the means for making the present invention more suitable,
The lock mechanism for adjusting the chute length has a plurality of recesses formed at a predetermined interval on either the upper chute portion or the lower chute portion and arranged in the grain guiding direction of the discharge chute. A saw blade-like swinging arm arranged in this manner, and an engaging part arranged to selectively engage with the plurality of recesses on the other side of the upper-side chute part and the lower-side chute part And consisted of

  According to this means, the lock mechanism for adjusting the chute length can be configured simply and inexpensively from the saw blade-like swing arm and the engaging portion.

  Accordingly, it is possible to simplify the configuration of the lock mechanism for adjusting the chute length and reduce the cost.

As one of the means for making the present invention more suitable,
The lock mechanism for adjusting the chute length is provided with a biasing means for biasing the swing arm.

  According to this means, it is possible to easily and reliably maintain the saw-toothed swing arm in the engaged state with the engaging portion by the biasing means.

  Therefore, the length of the discharge chute can be easily and reliably adjusted.

As one of the means for making the present invention more suitable,
The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
On the upper side end of the lower-side chute part in the grain guide direction, an upper-side connecting rod connecting the upper sides of the pair of side plates is provided,
The upper side connecting rod is configured to serve also as the engaging portion.

  According to this means, when the discharge chute is formed in the groove shape, when the clogging of the grain occurs in the discharge chute, it becomes possible to detect the clogging at an early stage visually. Moreover, the clogged grain can be easily swept down toward the lower side of the discharge chute with the hand inserted from the open part of the discharge chute.

  And the deformation | transformation of the discharge chute which becomes easy to produce because the discharge chute was formed in the groove | channel type | mold can be suppressed by the upper side connection rod. Further, since the upper side connecting rod also serves as an engaging portion of the lock mechanism for adjusting the chute length, the number of parts in the lock mechanism for adjusting the chute length can be reduced.

  Therefore, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute and to simplify the configuration and reduce the cost by reducing the number of parts while suppressing the deformation of the discharge chute.

As one of the means for making the present invention more suitable,
The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
The lower side chute | shoot part was equipped with the lower side connection hook which connects those upper side over the pair of side plate in the grain guidance direction lower end part.

  According to this means, when the discharge chute is formed in the groove shape, when the clogging of the grain occurs in the discharge chute, it becomes possible to detect the clogging at an early stage visually. Moreover, the clogged grain can be easily swept down toward the lower side of the discharge chute with the hand inserted from the open part of the discharge chute.

  And the deformation | transformation of the discharge chute which becomes easy to produce because the discharge chute was formed in the groove shape can be suppressed by the lower side connecting rod. When the lower chute is slid with respect to the upper chute, the lower connecting rod can be used as a gripping part, which makes it easier to slide the lower chute. Become.

  Accordingly, it is possible to easily and quickly cope with the clogging of the grain with the discharge chute, and to improve the operability when adjusting the length of the discharge chute while suppressing the deformation of the 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 a combine grain discharging structure according to the present invention is applied to a self-decomposing 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 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. Then, the position directly below the discharge guide 27 in the conveyor casing 21, the discharge guide 27 is deployed discharge chute 17 so as to flow down guide the grains shown in the guidance to the right outer side of the fuselage.

  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 the upper region facing the discharge port 16 </ b> A and the upper side of the lifting screw 23. It is vertically long form and a lower region which polymerize one pitch of the screw vane. 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 that they cannot rotate relative to each other.

  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's 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 that the discharge chute 17 is swung up and down. 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 combine grain discharging structure according to the present invention is applied to a self-decomposing 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. Lock mechanism 17D is a hook member 17h having vertically swingably on the upstream side chute section 17A, the engaging pin 17i having sideways downstream side chute portion 17B, and the engaging hook member 17h with the engaging pin 17i 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 the grain discharging device 12, instead of the configuration in which the carrying-out screw 15 for carrying the grain stored in the grain tank 11 out of the tank from the grain outlet 11 </ b> E is provided at the bottom of the grain tank 11, The bottom part of the grain tank 11 is configured to have an inclined surface for guiding the grain stored in the grain tank 11 to flow down from the grain outlet 11E to the outside of the tank, or the bottom part of the grain tank 11 is vibrated. Thus, the grain stored in the grain tank 11 may be configured to flow and be guided out of the tank from the grain outlet 11E.

[3] As the grain discharging device 12, a discharge port 16A is formed on the upper rear side of the lifting conveyor 16, a discharging chute 17 is provided on the rear side which is the discharging port side of the lifting conveyor 16, and a bottom plate 17a is provided. It is possible to change the inclination angle by swinging up and down around a horizontal support shaft 40 that is horizontally oriented in a state where the grain tank 11 is located at the working position in a state facing the rear portion of the lifting conveyor 16. It may be configured as follows.

[4] As the grain discharging device 12, a discharge port 16A is formed on the upper rear side of the lifting conveyor 16, a discharging chute 17 is provided on the rear side which is the discharging port side of the lifting conveyor 16, and a side plate 17b thereof is provided. It is possible to change the inclination angle by swinging up and down with a laterally supporting shaft 40 which is oriented in the front-rear direction when the grain tank 11 is located at the working position in a state facing the rear part of the lifting conveyor 16. It may be configured as follows.

[5] As shown in FIG. 16, the grain discharging device 12 includes a lower case portion 21 </ b> F that supports the cylindrical conveyor case 21 in the transporting conveyor 16 by the second support column 24, and the lower case. The upper case portion 21G is fitted with a discharge guide 27 and a discharge chute 17 so that the upper case portion 21G can be rotated relative to the portion 21F. You may comprise so that the rocking | fluctuation operation which made the vertical axis X which passes through a fulcrum possible is possible.
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.

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

[7] 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.

[8] As the operation mechanism 95 for the discharge chute, the link wire bypasses the grain tank 11 from the operation lever 97 provided in the boarding operation unit 4 and the link wire that links the control lever 97 to the discharge chute 17. It may be configured as described above.

[9] A discharge chute operating mechanism 95 includes a front-rear rotation shaft 96, an operation lever 97 provided at the front end of the rotation shaft 96, and a discharge chute provided at the rear end of the rotation shaft 96. In this case, the pivot shaft 96 may be configured to pass above or laterally outward of the grain tank 11.

[10] As shown in FIG. 17, as the operation mechanism 95 for the discharge chute, the rotating shaft 96 and the operation arm 98 are integrally formed by bending a single round bar steel material or a round pipe material. The seventeen support shafts 40 may be configured not to be integrally formed with the rotation shaft 96 and the operation arm 98.
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. May be.

[11] As the operation mechanism 95 for the discharge chute, the rotating shaft 96 and the operating lever 97 are integrally formed by bending a single round bar steel material or a round pipe material. The operation arm 98 may be configured to be detachably connected. Further, the operating lever 97 and the operating arm 98 may be detachably connected to the rotating shaft 96. Further, the rotating shaft 96, the operation lever 97, and the operation arm 98 may be integrally formed by bending a single round bar steel material or a round pipe material.

[12] The operation lever 97 may be configured not to protrude outward from the outer end of the machine body when the discharge chute 17 is positioned at the retracted position.

[13] A tension spring or a compression spring may be employed as the biasing means 100 that swings and biases the discharge chute 17 upward.

[14] As the lock mechanism 41 for adjusting the chute angle, a plurality of engaged portions 42 a to 42 c for setting an inclination angle are provided on the lifting conveyor 16 at predetermined intervals in the grain conveying direction of the lifting conveyor 16. By deploying a tension member 43 that selectively engages with the plurality of engaged portions 42 a to 42 c by swinging in the same direction as the discharge chute 17. It may be configured.

[15] The lock mechanism 41 for adjusting the chute angle includes a plurality of recessed portions provided in the front end portion of the grain tank 11 or the boarding operation portion 4 in a state in which the lock mechanism 41 can selectively engage with the operation lever 97. It may be configured.

[16] The lock operation mechanism 101 includes a lock operation lever 103 provided in the boarding operation unit 4 and a lock connection wire that links the lock operation lever 103 to the tension member 43. It may be configured to bypass the grain tank 11.

[17] When the locking operation mechanism 101 is constituted by the front and rear locking rotation shafts 102 and the locking operation lever 103 provided at the front end of the locking rotation shaft 102 , the locking rotation mechanism You may comprise so that the axis | shaft 102 may pass the lateral outward of the grain tank 11. FIG.

[18] As the lock operation mechanism 101, the lock rotation shaft 102 and the lock operation lever 103 are integrally formed by bending a single round bar steel material or a round pipe material. It may be configured such that the stretching member 43 is detachably connected to the rear end portion. Further, a structure in which the tension member 43 and the lock operation lever 103 are detachably connected to the lock rotation shaft 102 may be used. Further, the tension member 43, the lock rotation shaft 102, and the lock operation lever 103 may be integrally formed by bending a single round bar steel material or a round pipe material.

[19] The locking operation lever 103 may be configured not to protrude outward from the outer end of the machine body when the discharge chute 17 is positioned at the retracted position.

[20] A tension spring or a compression spring may be employed as the urging means 44 that urges the tension member 43 to swing upward.

[21] A case where the discharge guide 27 is constituted by a fixed portion 31 fixed to the lifting conveyor 16 and a movable portion 33 externally connected to the fixed portion 31 so as to be swingable in the grain discharging direction of the lifting conveyor 16. In the discharge stop state in which the grain is not discharged from the discharge port 16A, the opening area of the opening 27A may be minimized by the weight of the movable portion 33.

[22] A torsion spring or a compression spring may be employed as the biasing means 34 that swings and biases the movable portion 33 in the direction of narrowing the opening area of the opening 27A.

[23] As the lock mechanism 90 for adjusting the chute length, the lower chute portion 17B may be equipped with a dedicated engaging portion 17d that selectively engages with the plurality of concave portions 92a.

[24] As the lock mechanism 90 for adjusting the chute length, a plurality of recesses 92a formed at predetermined intervals on the lower chute 17B that is externally fitted to the upper chute 17A is a grain guide for the discharge chute 17. It has a saw blade-like swing arm 92 arranged so as to be aligned in the direction, and is configured by disposing an engaging portion 17d that selectively engages with the plurality of concave portions 92a on the upper chute portion 17A. It may be a thing.

[25] As the biasing means 93 for biasing the swing arm 92, a tension spring or a compression spring may be employed.

  The grain discharge structure of the combine according to the present invention can be applied to a self-removal type or whole-pile type type combine equipped with a grain tank.

DESCRIPTION OF SYMBOLS 4 Boarding operation part 6 Threshing apparatus 11 Grain tank 12 Grain discharge apparatus 16 Lifting conveyor 16A Discharge port 17 Discharge chute 17A Upper side chute part 17B Lower side chute part 17a Bottom plate 17b Side plate 17d Engagement part (upper side connection rod)
17e Lower side connecting rod 27 Discharge guide 27A Opening portion 28 Fixed portion 29 Movable portion 31 Fixed portion 33 Movable portion 34 Energizing means 40 Lateral support shaft 41 Lock mechanism 42a Engaged portion 42b Engaged portion 42c Engaged portion 43 Stretching member 44 Energizing means 51 Cover body 90 Locking mechanism for adjusting the chute length 92 Swing arm 92a Recessed portion 93 Energizing means 95 Mechanically linked operation mechanism 96 Front / rear rotating shaft 97 Operating lever 98 For discharge chute Operation arm 100 Energizing means 101 Mechanically linked locking operation mechanism 102 Front-rear locking rotation shaft 103 Locking operation lever X Vertical axis

Claims (30)

In the grain discharge structure of a combine equipped with a grain discharge device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine,
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
The discharge chute is configured such that, on the discharge port side of the transporting conveyor, the inclination angle can be changed by swinging up and down with the upper side as a fulcrum,
A combine grain discharging structure including a mechanically linked operation mechanism that enables a vertical swing operation of the discharge chute from the front of the grain tank.   With the vertical axis provided behind the grain tank as a fulcrum, the grain tank swings over a work position adjacent to the threshing device and a maintenance position where the threshing device is separated laterally outward from the machine, And the grain discharge structure of the combine of Claim 1 comprised so that the said conveyance conveyor and the said discharge chute might move integrally with the said grain tank. The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
For the operation mechanism, a rotation shaft extending in the front-rear direction across the front and rear ends of the grain tank, an operation lever provided at the front end of the rotation shaft, and a discharge chute provided at the rear end of the rotation shaft 3. The combine grain discharging structure according to claim 1, wherein the operation mechanism is configured such that the operation lever and the operation arm swing together via the rotation shaft. .   The combine grain discharging structure according to claim 3, wherein the support shaft and the rotation shaft are arranged on the same axis.   The combine grain discharging structure according to claim 4, wherein the support shaft is integrally formed with the rotating shaft.   The combine grain discharging structure according to any one of claims 3 to 5, wherein the operation mechanism is configured to include the operation lever, the operation arm, and the rotation shaft by bending a single member. .   The combine grain discharging structure according to any one of claims 3 to 6, wherein the pivot shaft penetrates the grain tank in the front-rear direction.   3. The combine according to claim 1, wherein the operation mechanism includes an operation lever provided in a boarding operation unit located in front of the grain tank, and a linkage wire that links the operation lever to the discharge chute. Kernel discharge structure.   The combine grain discharging structure according to any one of claims 3 to 8, wherein the operation lever is configured not to protrude outward of the fuselage.   The combine grain discharging structure according to any one of claims 1 to 9, further comprising an urging means that swings and urges the discharging chute upward.   The combine grain discharge structure according to any one of claims 1 to 10, further comprising a lock mechanism that enables the discharge chute to be fixedly held at an arbitrary inclination angle. An inclination angle in which the lock mechanism is disposed in any one of the lifting conveyor and the discharging chute with a predetermined interval in the grain conveying direction of the lifting conveyor or the grain guiding direction of the discharging chute. The discharge chute is configured such that a plurality of engaged portions for setting, and the other one of the transporting conveyor and the discharge chute can be selectively engaged with the plurality of engaged portions. And a strut member deployed so that it can swing in the same direction as
The combine grain discharging structure according to claim 11, further comprising a mechanically linked locking operation mechanism that enables the lock mechanism to be operated from the front of the grain tank. The discharge conveyor side of the conveyor is set to the side of the fuselage, and the discharge chute is configured to swing up and down with a lateral support shaft as a fulcrum,
The tension member is provided in the transporting conveyor,
The locking operation mechanism includes a front and rear locking rotation shaft extending from the front end portion of the grain tank to the tension member, and a locking operation lever provided at the front end portion of the rotation shaft, The combine grain discharging structure according to claim 12, wherein the operation mechanism is configured so that the lock operation lever and the tension member swing together through the lock rotation shaft.   The combine grain discharging structure according to claim 13, wherein the tension member, the lock rotation shaft, and the lock operation lever are integrally formed by bending a single member.   The lock operation mechanism comprises a lock operation lever provided in a boarding operation part located in front of the grain tank, and a lock link wire that links the lock operation lever to the tension member. 12. The grain discharge structure of the combine according to 12.   The combine grain discharging structure according to any one of claims 13 to 15, wherein the locking operation lever is configured not to protrude outward of the fuselage.   The combine grain discharging structure according to any one of claims 12 to 16, wherein the lock mechanism includes an urging unit that urges the tension member to swing upward. Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The combine grain discharging structure according to any one of claims 1 to 17, wherein the discharging guide is configured to be capable of changing an opening area of an opening portion with respect to the discharging chute. In the grain discharge structure of a combine equipped with a grain discharge device that discharges the grain stored in the grain tank from the rear part of the grain tank to the outside of the machine,
The above-described grain discharging device is configured to lift the grain in the grain tank behind the grain tank and discharge it from the upper outlet, and the grain discharged from the outlet to the machine body. It has a discharge chute that guides it to the outside,
Deploying the discharge chute below the outlet of the conveyor;
The lifting conveyor includes a discharge guide that guides the grain from the discharge port to the discharge chute,
The grain discharge structure of the combine which comprised the said discharge guide so that the opening area of the opening part with respect to the said discharge chute could be changed.   The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so that the position of the lifting conveyor can be changed in the grain discharging direction of the lifting conveyor. 20. The combine grain discharging structure according to claim 18 or 19, wherein the opening area of the opening is changed by changing the connecting position of the movable part with respect to the fixed part.   The discharge guide includes a fixed portion fixed to the lifting conveyor, and a movable portion externally connected to the fixed portion so as to be swingable in the grain discharging direction of the lifting conveyor. In the discharging state in which the grain is discharged from the discharge port, the opening of the opening is reduced by the amount of the grain discharged from the discharge port as the movable part swings upon receiving the pressing of the grain from the discharge port. In the discharge stop state in which the grain is not discharged from the outlet, the movable portion does not receive the pressing of the grain from the outlet, so that the opening area of the opening is minimized. The grain discharge structure for a combine according to claim 18 or 19, which is configured as described above.   The combine grain discharging structure according to claim 21, wherein the discharging guide includes biasing means for swinging and biasing the movable part in a direction of narrowing an opening area of the opening.   The combine grain discharging structure according to any one of claims 20 to 22, wherein the movable part is configured not to protrude outward from the fuselage in a state where the opening area of the opening is minimized. At least the upper side of the discharge chute is formed into a groove shape including a bottom plate and a pair of side plates rising from the bottom plate,
The grain of the combine according to any one of claims 1 to 23, wherein the grain discharging device includes a cover body that covers the upper side of the discharge chute from above from the upper part of the conveyor to the discharge chute. Discharge structure.   The combine grain discharging structure according to claim 24, wherein the cover body is attached to an upper portion of the transporting conveyor so as to be vertically swingable. The discharge chute comprises an upper chute portion that constitutes the upper side of the grain direction of the discharge chute, and a lower chute portion that constitutes the lower side of the grain direction of the discharge chute,
Fitting the lower chute part slidably in the grain guide direction with respect to the upper chute part,
The combine according to any one of claims 1 to 25, further comprising a lock mechanism for adjusting the chute length that enables the lower chute portion to be fixed and held at an arbitrary sliding position with respect to the upper chute portion. Grain discharge structure.   The lock mechanism for adjusting the chute length has a plurality of recesses formed at a predetermined interval on either the upper chute portion or the lower chute portion and arranged in the grain guiding direction of the discharge chute. A saw blade-like swinging arm arranged in this manner, and an engaging part arranged to selectively engage with the plurality of recesses on the other side of the upper-side chute part and the lower-side chute part 27. The combine grain discharging structure according to claim 26, comprising:   The combine grain discharging structure according to claim 27, wherein the lock mechanism for adjusting the chute length is provided with a biasing means for biasing the swing arm. The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
On the upper side end of the lower-side chute part in the grain guide direction, an upper-side connecting rod connecting the upper sides of the pair of side plates is provided,
29. The combine grain discharging structure according to claim 27 or 28, wherein the upper-side connecting rod also serves as the engaging portion. The lower-side chute part is formed into a groove shape composed of a bottom plate and a pair of side plates rising from the bottom plate,
30. The combine according to any one of claims 26 to 29, further comprising a lower-side connecting rod connecting the upper side of the pair of side plates across the pair of side plates at the lower end portion in the grain guiding direction of the lower-side chute portion. Kernel discharge structure.

Images