Harvester

Abstract

A harvester includes a harvesting unit provided in front of a traveling body and harvesting crops in a field, a threshing device provided in the traveling body and threshing the crops harvested by the harvesting unit, a conveying unit extending from the traveling body to the harvesting unit and supplying the crops harvested by the harvesting unit to the threshing device, and a threshing cylinder transmission device that transmits power from an engine, changes the transmitted power, and outputs the changed power to a threshing cylinder drive unit of the threshing device, the threshing cylinder transmission device being provided at a position higher than a body frame of the traveling body at a portion in front of the threshing device and below the conveying unit.

Description

[0001] This application is a divisional application of the following application:

[0002] Invention Title: Harvester

[0003] International application deadline: June 6, 2018

[0004] International Application Number: PCT / JP2018 / 021646

[0005] National Application Number: 201880035182.2 Technical Field

[0006] The present invention relates to a harvester comprising: a threshing device for threshing harvested crops; and a grain bin for storing the grains threshed by the threshing device. Background Technology

[0007] This type of harvester is configured to allow for maintenance of the grain bin's interior. For example, Patent Document 1 discloses a combine harvester having a grain bin with an opening formed in its side wall. This opening is covered by a removable cover (the first side cover 54 in Patent Document 1), which can be opened and closed freely by removing and installing the cover. In the combine harvester of Patent Document 1, the opening can be used as an inspection port for performing maintenance on the inside of the grain bin.

[0008] Furthermore, some harvesters include a sorting frame oscillating inside the threshing body and a chaff screen supported by the sorting frame, whose opening of the material passing through the screen is adjustable. In such harvesters, the opening of the material passing through the screen is adjusted, allowing for high-precision sorting even if the quantity or characteristics of the harvested material supplied to the threshing unit change. Moreover, some harvesters are equipped with a remote operating device that is linked to the opening adjustment unit of the chaff screen via an operating cable, allowing for remote operation of the opening adjustment unit via electric power. With this structure, the opening of the chaff screen can be easily adjusted simply by operating the remote operating device.

[0009] As an example of such a structure, there is the structure disclosed in Patent Document 2. In the structure shown in Patent Document 2, the sieve plate is configured to oscillate integrally via a metal wire and an electric motor, which allows for adjustment of the discharge opening of the processed material.

[0010] One type of harvester has an inspection port at the rear of the threshing body for removing / placing sorting frames. The sorting frames can be removed from the inspection port to the outside of the threshing body for cleaning and inspection of the husks and other materials in the sorting frames.

[0011] Furthermore, some harvesters are equipped with a threshing drum speed changer that transmits power from the engine, changes the speed of the transmitted power, and outputs it to the threshing drum drive unit of the threshing device. With such a harvester, even if the harvesting characteristics, varieties, or other crops are different, or if the amount of crop supplied to the threshing device changes, the drive speed of the threshing drum can be changed through the threshing drum speed changer, making it less likely to cause incomplete threshing.

[0012] Conventionally, a combine harvester as shown in Patent Document 3 is an example of such a harvester. In the combine harvester shown in Patent Document 3, the power of the engine is transmitted to the input shaft of the transmission box via a drive belt, and the power of the output shaft of the transmission box is transmitted to the input shaft of the threshing drum via a drive belt and a drive shaft. Inside the transmission box, there is a gear transmission mechanism that changes the rotational speed of the input shaft into three levels (high, medium, and low) and transmits them to the output shaft. The transmission box is located between the front of the threshing device and the front (bottom) of the grain bin.

[0013] Existing technical documents

[0014] Patent documents

[0015] Patent Document 1: Japanese Patent Application Publication No. 2016-67221

[0016] Patent Document 2: Japanese Patent Application Publication No. 9-56250

[0017] Patent Document 3: Japanese Patent Publication No. 3907596 Summary of the Invention

[0018] The problem that the invention aims to solve

[0019] However, in the combine harvester of Patent Document 1, in order to open the inspection port, two outer covers (the third side cover 61 and the second side cover 55 in Patent Document 1) covering a portion of the cover must be removed before removing the cover covering the inspection port, requiring multiple steps. Furthermore, since the inspection port is integrally formed across the side wall of the grain bin in the front-to-back direction of the machine body, removing the cover covering the inspection port and the outer covers is very laborious. Therefore, the combine harvester of Patent Document 1 cannot easily perform internal maintenance on the grain bin.

[0020] In view of the above-mentioned actual situation, there is a need for a harvester that can easily open and close the inspection port formed in the grain bin and easily perform internal maintenance of the grain bin.

[0021] Furthermore, in the combine harvester of Patent Document 1, the cover abuts against the edge of the inspection port from the outside, thereby blocking the inspection port. Therefore, when the pressure acting on the outside of the grain bin increases due to the accumulation of grains inside, the pressure acts on the cover towards the outside, i.e., the side where the cover might detach. Therefore, with the existing structure, the cover may detach due to the pressure inside the grain bin, and there is room for improvement in its durability against this pressure.

[0022] In view of the above actual situation, there is a need for a harvester that has an inspection port in the grain bin that can be used for maintenance, but the inspection port will not be accidentally opened due to the internal pressure of the grain bin.

[0023] When the remote control device is located deep within the threshing machine, a method is sometimes used where the connection between the remote control device and the control cable is disconnected, and the sorting box is removed from the outside of the threshing machine. In this case, disconnecting the remote control device from the control cable is time-consuming, and the time required to remove the sorting box is also increased. Alternatively, a method is sometimes used where the remote control device is removed while remaining connected to the control cable, and the remote control device and sorting box are removed together. In this case, disassembling the remote control device is time-consuming, and the time required to remove the sorting box is also increased.

[0024] Therefore, a harvester capable of quickly removing the sorting boxes is desired.

[0025] When using the technology disclosed in Patent Document 3, the threshing device or grain box is located in front of the threshing cylinder speed change device when the speed change operation is performed. Therefore, the threshing device or the like will hinder the speed change operation and make it difficult to perform the speed change operation of the threshing cylinder speed change device.

[0026] Therefore, a harvester that allows for easy speed changes in the threshing drum speed changer is desired.

[0027] Solution for solving the problem

[0028] A harvester according to one embodiment of the present invention is characterized by comprising: a threshing device for threshing harvested crops; and a grain bin arranged laterally with the threshing device for storing grains threshed by the threshing device, wherein an inspection port is provided on the outer side wall of the grain bin located on the opposite side of the threshing device in the left-right direction; and a door for opening and closing the inspection port.

[0029] According to this structure, the inspection port of the grain bin has a partial opening in the front-rear direction of the outer side wall, thus allowing entry into the grain bin from the side with more space, and making the area occupied by the inspection port in the front-rear direction relatively narrow. Therefore, it is possible to reduce the need for laborious operations to open the inspection port. Furthermore, the inspection port is configured to be opened and closed via a door. Therefore, opening and closing the inspection port can be performed easily. Therefore, according to the present invention, opening and closing the inspection port, which is necessary for maintaining the interior of the grain bin, is easy, thus enabling easy maintenance.

[0030] In one embodiment of the present invention, preferably, a discharge section for discharging the grains from the threshing device is provided inside the grain bin, and the inspection port is positioned so as not to overlap with the discharge section when viewed from the side.

[0031] According to this structure, since the inspection port and the discharge section do not overlap when viewed from the side, space for their respective configuration can be ensured with high reliability. Therefore, even if the door of the inspection port has an inward-opening shape that swings towards the inside of the grain bin, interference between the opened door and the discharge section located inside the grain bin can be avoided. Furthermore, even if various devices for measuring the state of the grains are provided around the discharge section, interference between these devices and the door can be avoided. Therefore, according to an embodiment of the present invention, space for maintenance around the discharge section can be easily ensured, facilitating maintenance.

[0032] In one embodiment of the present invention, preferably, the discharge portion is disposed in the front region of the interior of the grain bin, and the inspection port is disposed in the rear region of the outer side wall.

[0033] According to this structure, the discharge section and the inspection port can be arranged at different positions in the front-rear direction. Therefore, for example, when performing maintenance on the discharge section and surrounding devices, they can be accessed from the rear, making maintenance easier.

[0034] In one embodiment of the invention, preferably, the door has an abutting portion that abuts against the edge of the inspection port, and in the closed state of the door, the abutting portion abuts against the edge via a sealing member.

[0035] According to this structure, when the door is closed, the edge of the inspection port abuts against the door via a sealing member, thus ensuring the airtightness of the grain bin with high reliability.

[0036] In one embodiment of the invention, preferably, the door is formed to be larger than the inspection opening, and the abutting portion abuts against the edge portion from the inside of the grain bin.

[0037] According to this structure, the door's abutting portion abuts against the edge of the inspection port from the inside of the grain bin. Therefore, even if the pressure acting towards the outside of the grain bin increases due to the accumulation of grains inside, the door can be prevented from falling off due to this pressure. Thus, according to this structure, a door with high durability against internal pressure of the grain bin can be achieved.

[0038] In one embodiment of the invention, it is preferred that the door is disposed on the same plane as the outer surface of the outer side wall.

[0039] For example, in situations where, unlike this structure, the door's outer surface relative to the outer wall is positioned on the outside or inside, and the harvester is blown by strong winds, air resistance is locally applied to the door, potentially causing it to break or fall off. However, according to this structure, the air resistance applied to the outer surface of the outer wall including the door can be made uniform, thereby suppressing door breakage and detachment. Furthermore, since the outer surface of the outer wall including the door is a single plane, the safety of the area around the outer wall, such as the safety of operators working around it, can be improved.

[0040] In one embodiment of the invention, it is preferred that the door has a recessed portion that is recessed toward the inside of the grain bin, and a handle for opening and closing the door is provided in the recessed portion.

[0041] According to this structure, the handle is located in a recessed portion facing the inner side of the grain bin, thus preventing the handle from protruding outward from the outer surface of the outer wall. This further enhances the safety of the perimeter of the outer wall.

[0042] In one embodiment of the invention, it is preferred that the recess is formed as an inwardly narrow shape that narrows toward the inside.

[0043] According to this structure, the angle of the edge in the recess can be made gentler, allowing for safe operation of the handle.

[0044] In one embodiment of the present invention, it is preferred that the inspection port is formed as a longitudinal shape along the vertical direction.

[0045] When the inspection port is elongated, the operator can enter and exit the grain bin without strain. Therefore, according to this structure, entry and exit to the grain bin can be easily performed via the inspection port.

[0046] In one embodiment of the present invention, it is preferred that the grain bin includes: a lower side box portion formed in a narrow-bottom shape, and a bottom stirring cage disposed thereon for discharging stored grains from the grain bin; and an upper side box portion disposed above the lower side box portion, wherein the inspection port is formed extending from the upper part of the portion constituting the outer side wall of the upper side box portion to the lower part.

[0047] According to this structure, since the inspection port is formed on the upper box section, it is easier and simpler to install the inspection port compared to the case where the inspection port is formed on the lower box section, which has a narrower shape at the bottom. Furthermore, it is also easy and simple to install a door for opening and closing this inspection port.

[0048] A combine harvester according to one embodiment of the present invention is characterized by comprising: a threshing device for threshing harvested crops; and a grain bin arranged laterally with the threshing device for storing grains threshed by the threshing device; further comprising: an inspection port that opens into the side wall of the grain bin; and a door configured to open inwards, which abuts against the edge of the inspection port from the inside of the grain bin to close the inspection port.

[0049] According to this structure, the door that closes the inspection port has a predetermined opening and closing mechanism. The door, configured as an inward-opening type, abuts against the edge of the inspection port from the inside of the grain bin. Therefore, even if the pressure acting towards the outside of the grain bin increases due to the accumulation of grains inside, the door can be prevented from opening due to this pressure. Thus, according to this structure, the inspection port will not open accidentally due to internal pressure in the grain bin.

[0050] In one embodiment of the invention, preferably, the door has an abutting portion that abuts against the edge portion, and in the closed state of the door, the abutting portion abuts against the edge portion via a sealing member.

[0051] According to this structure, when the door is closed, the edge of the inspection port abuts against the door via a sealing member, so even if the pressure inside the grain bin increases, the door can be prevented from breaking through the buffering effect of the sealing member.

[0052] In one embodiment of the present invention, preferably, the abutting portion is disposed around the entire periphery of the door and abuts against the entire edge portion.

[0053] According to this structure, the pressure acting on the abutment part can be dispersed to the entire periphery of the door, and damage to the door caused by local pressure concentration can be suppressed.

[0054] In one embodiment of the invention, preferably, the door has a curved portion that bends toward the inside of the grain bin, the abutting portion is configured to be continuously formed with the curved portion and opposite the edge portion, and the door is disposed on the same plane relative to the outer surface of the sidewall.

[0055] According to this structure, the bending portion, which curves inward toward the grain bin, improves the door's durability against pressure acting from the inside of the grain bin outward. Furthermore, by forming an abutment portion continuously with the bending portion, it is easy to align this abutment portion with the edge of the inspection port. Moreover, with this structure, the outer surfaces of the door and the sidewall can be aligned on the same plane, thereby improving the safety of the area around the sidewall, such as the safety of operators working around it.

[0056] In one embodiment of the invention, it is preferred that the door has a recessed portion that is recessed toward the inside of the grain bin, and a handle for opening and closing the door is provided in the recessed portion.

[0057] According to this structure, since the handle is located in a recessed portion facing the inner side of the grain bin, it is possible to prevent the handle from protruding outward from the outer surface of the side wall. This further enhances the safety of the perimeter of the side wall.

[0058] In one embodiment of the present invention, preferably, the grain bin is provided with a locking mechanism for locking the door in a closed state, and the handle for opening and closing the door and the locking mechanism are configured to be linked.

[0059] According to this structure, the door is locked by a locking mechanism, thereby maintaining the door in a closed state. Furthermore, the locking mechanism located inside the grain bin can be operated from the outside of the grain bin by a handle provided on the outside of the door.

[0060] In one embodiment of the invention, it is preferred that the grain bin has a support mechanism inside to support the door in the closed state.

[0061] Generally, grain bins require a certain degree of rigidity, therefore the door constituting the grain bin is preferably made of, for example, metal to provide rigidity. The heavier the door, the easier it is to tilt relative to the inspection opening (grain bin). In particular, even a slight tilt of the door when it is closed can create a gap between the door and the inspection opening. From the viewpoint of ensuring the grain bin's airtightness, this is undesirable. According to this structure, by supporting the door in the closed state with a support mechanism, tilting of the door relative to the inspection opening can be suppressed, ensuring the grain bin's airtightness with high reliability.

[0062] In one embodiment of the invention, it is preferred that a plurality of ribs are formed on the inner side of the grain bin in the door.

[0063] According to this structure, the door's durability against the internal pressure of the grain bin can be improved through multiple ribs.

[0064] In one embodiment of the invention, it is preferred that the plurality of ribs are configured to have a plurality of longitudinal ribs formed in the vertical direction and a plurality of transverse ribs formed in the horizontal direction.

[0065] According to this structure, the durability of the door to bending stress in the vertical and horizontal directions can be improved, and even under higher pressure, the door can be further suppressed from breaking.

[0066] In one embodiment of the present invention, preferably, a plurality of the longitudinal ribs are disposed at positions that sandwich the recess, and a plurality of the transverse ribs are respectively disposed at the upper and lower edges of the door.

[0067] According to this structure, the durability of the recess, which is prone to stress concentration, can be improved by sandwiching it between longitudinal ribs. Furthermore, even at the edge portions of the door where stress concentration is more likely to occur, the overall durability of the door can be improved by arranging transverse ribs at those edge portions.

[0068] In a harvester according to one embodiment of the present invention, arranged in a configuration along the lateral width direction of the traveling body, the traveling body includes: a threshing device that receives crop harvested by the harvesting section, threshes the supplied crop, and sorts the threshed material; and a storage unit that receives and stores the threshed material discharged from the threshing device. The threshing device includes: a threshing body; a sorting frame that is oscillatingly disposed inside the threshing body; a chaff screen supported by the sorting frame and whose opening is adjustable; and an inspection port that opens at the rear of the threshing body for removing / placing the sorting frame. A remote operation device is provided behind the storage unit, and the remote operation device is linked to the opening adjustment unit of the chaff screen via an operation cable, and the opening adjustment unit is operated remotely by electric power.

[0069] According to this structure, the remote operating device can be easily reached from the rear of the machine body. Therefore, when removing the sorting frame from the threshing machine body for cleaning, inspection, etc., it is easy to disconnect the remote operating device from the operating cable or remove the remote operating device.

[0070] Therefore, when disconnecting the remote operating device from the operating cable and removing the sorting box, the connection is easily severed, allowing for quick removal of the sorting box. Similarly, when removing the remote operating device while keeping it connected to the operating cable, the sorting box can be easily removed, enabling quick retrieval of the sorting box.

[0071] In one embodiment of the present invention, preferably, the storage section is a threshing box, comprising: a longitudinal discharge device disposed on the rear side of the threshing box in a vertically extending manner on the traveling body, for discharging threshing material from the threshing box; and a support column erected on the traveling body for supporting the longitudinal discharge device, wherein the remote operation device is supported by the support column.

[0072] According to this structure, a remote operating device can be securely supported by a simple support structure, which effectively uses a high-rigidity strut for supporting a longitudinal discharge device to support the remote operating device.

[0073] In one embodiment of the invention, preferably, the remote operating device is supported by the support column in a position located behind the support column.

[0074] According to this structure, the remote control device can be more easily reached from the rear of the vehicle body, making it easier to remove the remote control device or disconnect the remote control device from the operating cable, and enabling the sorting box to be removed more quickly.

[0075] A harvester according to one embodiment of the present invention includes: a harvesting section disposed in front of a traveling body for harvesting crops in a field; a threshing device disposed in the traveling body for threshing the crops harvested by the harvesting section; a conveying section extending from the traveling body to the harvesting section for supplying the crops harvested by the harvesting section to the threshing device; and a threshing drum speed changer for transmitting power from an engine, changing the speed of the transmitted power, and outputting it to a threshing drum drive section of the threshing device, wherein the threshing drum speed changer is disposed in a position in front of the threshing device and below the conveying section, at a position higher than the body frame of the traveling body.

[0076] According to this structure, the threshing device is located behind the threshing cylinder speed change device, the conveying unit is located above the threshing cylinder speed change device, and the machine frame is located below the threshing cylinder speed change device. Therefore, the threshing device, the conveying unit, and the machine frame do not easily obstruct the speed change operation of the threshing cylinder speed change device from the outside of the traveling machine body, and the speed change operation is easy.

[0077] In one embodiment of the present invention, it is preferred that the threshing device is covered by an outer cover that extends laterally from the outer side of the traveling body, and the threshing cylinder transmission device is covered by the outer cover from the outer side of the traveling body.

[0078] According to this structure, the outer cover covering the threshing device can be effectively used as a cover for the threshing drum speed change device, thus protecting the threshing drum speed change device inexpensively.

[0079] In one embodiment of the present invention, preferably, the front end of the threshing drum speed change device has a speed change operation portion protruding forward, and the outer cover is configured to change state between a closed state covering the threshing device and the threshing drum speed change device and an open state opening the threshing device and the threshing drum speed change device. The front end of the outer cover has a front transverse cover portion that protrudes laterally toward the inner side of the machine body. When the outer cover is in the closed state, the front transverse cover portion covers the speed change operation portion from the front side, and when the outer cover is in the open state, the front transverse cover portion opens the speed change operation portion.

[0080] According to this structure, the shift control unit is protected by the front transverse cover simply by closing the outer cover. Opening the outer cover removes the front transverse cover from the shift control unit, allowing it to be operated.

[0081] In one embodiment of the present invention, it is preferred that power is transmitted from the input axis of the threshing drum speed change device to the drive shaft of the conveying section.

[0082] According to this structure, the threshing drum speed change device is effectively used as a unit to transfer power from the engine to the threshing drum and the conveying section, and it is able to transmit power at a fixed rotational speed that is not affected by the speed change of the threshing drum to the conveying section.

[0083] In one embodiment of the present invention, preferably, the threshing drum speed change device is located in front of the fan of the threshing device, and the engine is located on the side opposite to the side where the threshing drum speed change device is located on the two sides of the traveling body, and the power of the engine is transmitted to the input shaft of the threshing drum speed change device via the fan.

[0084] According to this structure, power from the engine can be transmitted to the threshing drum speed changer by using a simple power transmission structure that effectively uses the blower as an intermediate unit.

[0085] In one embodiment of the present invention, preferably, in the threshing drum speed change device, the input shaft is located above the output shaft.

[0086] According to this structure, when an input pulley with a diameter larger than that of an output pulley is used, compared with a structure where the input shaft is located below the output shaft, it is possible to avoid or suppress the pulley from protruding downward from the threshing drum speed change device, thus enabling its use.

[0087] In one embodiment of the present invention, preferably, the drive shaft of the conveying unit and the threshing drum drive unit are located above the threshing drum speed change device, the power of the output shaft is transmitted to the threshing drum drive unit, and the power of the input shaft is transmitted to the drive shaft, and the transmission system connecting the output shaft and the threshing drum drive unit is located on the lateral outer side of the traveling body than the transmission system connecting the input shaft and the drive shaft.

[0088] According to this structure, the driving load of the threshing cylinder is often greater than that of the conveying section, and the replacement frequency of the transmission components for the threshing cylinder drive section is often higher than that of the transmission components for the conveying section. Therefore, since the transmission components for the threshing cylinder drive section are located laterally outside the traveling body than the transmission components for the conveying section, it is easier to replace the transmission components for the threshing cylinder drive section. Attached Figure Description

[0089] Figure 1 This is a top view of the combine harvester according to Embodiment 1.

[0090] Figure 2 This is a right view of the combine harvester according to Embodiment 1.

[0091] Figure 3 This is a cross-sectional view of the main parts of the combine harvester in Embodiment 1 when viewed from the rear.

[0092] Figure 4 This is a cross-sectional view of the main parts of the combine harvester in Embodiment 1, viewed from the right.

[0093] Figure 5 This is a top-down sectional view of the main parts of the combine harvester in Embodiment 1.

[0094] Figure 6 This is a perspective view of the grain bin according to Embodiment 1.

[0095] Figure 7 This is an enlarged cross-sectional view of the main part of the grain bin in Embodiment 1, viewed from above.

[0096] Figure 8 This is an enlarged cross-sectional view of the main part of the grain bin in Embodiment 1 when viewed from the rear.

[0097] Figure 9 This is a left view showing the main part of the inner side of the grain bin in Embodiment 1.

[0098] Figure 10 This is a cross-sectional view of the main parts around the ceiling inspection opening in Embodiment 1 when viewed from the right.

[0099] Figure 11 This is a top-view cross-sectional view showing the main parts of the connecting mechanism of the lower side cover of Embodiment 1.

[0100] Figure 12 This is a cross-sectional view of the main part of the connecting mechanism of the lower side cover in Embodiment 1 when viewed from the rear.

[0101] Figure 13 This is a right view of a combine harvester according to another embodiment of Embodiment 1.

[0102] Figure 14 This is a right view of a combine harvester according to another embodiment of Embodiment 1.

[0103] Figure 15 This is a left view showing the overall structure of the combine harvester according to Embodiment 2.

[0104] Figure 16 This is a top view showing the overall structure of the combine harvester according to Embodiment 2.

[0105] Figure 17 This is a longitudinal sectional side view showing the threshing apparatus of Embodiment 2.

[0106] Figure 18 This is a rear view showing the configuration of the remote operation device in Embodiment 2.

[0107] Figure 19 This is a side view showing the opening adjustment section of Embodiment 2.

[0108] Figure 20 This is a top view showing the opening adjustment section of Embodiment 2.

[0109] Figure 21 This is a rear view of the remote operation device according to Embodiment 2.

[0110] Figure 22 This is a cross-sectional top view of the remote operation device according to Embodiment 2.

[0111] Figure 23 This refers to the connection between the opening adjustment unit and the remote operation device in Embodiment 2, and the removal of the sorting box.

[0112] Figure 24 This is a left view showing the overall structure of the combine harvester according to embodiment 3.

[0113] Figure 25 This is a top view showing the overall structure of the combine harvester according to embodiment 3.

[0114] Figure 26 This is a line diagram showing the power transmission structure of embodiment 3.

[0115] Figure 27 This is a left view showing the arrangement of the threshing drum speed change device and the power transmission structure in Embodiment 3.

[0116] Figure 28 This is a front view showing the configuration of the threshing drum speed change device and the power transmission structure of Embodiment 3.

[0117] Figure 29 This is a top view showing the arrangement of the threshing drum speed change device and the power transmission structure in Embodiment 3.

[0118] Figure 30 This is a side view showing the airflow regulating mechanism of the fan in Embodiment 3. Detailed Implementation

[0119] (Implementation Method 1)

[0120] As an example of an embodiment of the present invention, the case of applying the present invention of Embodiment 1 to a full-feed combine harvester will be described with reference to the accompanying drawings. It should be noted that, in the following description, unless otherwise stated, the forward direction of the combine harvester will be used as the front side to define the "front-to-back direction" and the "left-to-right direction".

[0121] (A rough outline of a combine harvester)

[0122] like Figure 1 and Figure 2 As shown, the combine harvester 100 travels via a pair of tracked running gears C supported on the left and right sides of the machine frame F. In the illustrated example, the combine harvester 100 is configured as a full-feed combine harvester, capable of harvesting crops such as rice, soybeans, and buckwheat planted in the field.

[0123] The combine harvester 100 includes: a harvesting section 1 for harvesting standing rice stalks; a threshing device 2 for threshing the harvested standing rice stalks; a grain bin 4 arranged transversely to the threshing device 2 for storing the grains threshed by the threshing device 2; a discharger A for discharging the grains stored in the grain bin 4; and a driving section D for operating the combine harvester 100 as a whole, including the above-mentioned devices. It should be noted that in the following description, "upstream side" and "downstream side" are defined based on the flow from when the crop harvested by the harvesting section 1 is discharged by the discharger A.

[0124] (Harvesting Department)

[0125] like Figure 1 and Figure 2 As shown, the harvesting section 1 is located on the front side of the machine frame F. The harvesting section 1 is configured to move up and down around an axis along the left-right direction. During non-harvesting operations, such as when the combine harvester 100 is rotating, the harvesting section 1 is in an ascending state, and during harvesting operations, it is in a descending state close to the field surface.

[0126] The harvesting unit 1 includes: a divider 11 for separating and gathering standing rice stalks; a harrowing drum 12 for harrowing the standing rice stalks backward by being driven by rotation; a cutting device 13 for harvesting the standing rice stalks harrowed by the harrowing drum 12; and a lateral feeding device 14 and a conveying device 15 for conveying the harvested rice stalks harvested by the cutting device 13 to the threshing unit 2 at the rear.

[0127] (Threshing device)

[0128] like Figure 1 As shown, the threshing device 2 is located behind the harvesting section 1 and on the left side of the machine frame F. The threshing device 2 threshes the harvested crop. Specifically, the threshing device 2 threshes the harvested stalks harvested by the harvesting section 1 to obtain grains as a primary product. The grains obtained by threshing are collected by the primary product recovery section 22 of the threshing device 2 and conveyed to the primary product conveying section 3 (see also...). Figure 3 ).

[0129] (Primary Material Conveying Department)

[0130] like Figure 3 As shown, the primary material conveying unit 3 conveys grains from the threshing device 2 to the grain bin 4. The primary material conveying unit 3 includes a winnowing device 31 that conveys grains upward and a lateral feeding unit 32 that feeds the upward-conveyed grains laterally into the interior of the grain bin 4. Thus, the grains can be conveyed to the upper region of the grain bin 4.

[0131] The winnowing device 31 is configured as a bucket type, with multiple buckets on the outer periphery of an annular rotating chain that winds across the drive sprocket and the driven sprocket. The downstream end (upper end) of the winnowing device 31 is connected to the upstream end (left end) of the lateral feed unit 32.

[0132] The transverse feed section 32 penetrates the inner wall 4Wi of the grain bin 4. Therefore, the downstream end (right end) of the transverse feed section 32 is disposed inside the grain bin 4. The transverse feed section 32 includes: a stirring section 34, covered by a housing 33, for conveying grains downstream; and a discharge section 35, disposed at the downstream end of the transverse feed section 32, for discharging grains into the grain bin 4 by the rotation of the rotating blades 36.

[0133] like Figure 4 and Figure 5 As shown, the rotating blade 36 rotates about an axis in the left-right direction. Therefore, the grains discharged from the discharge section 35 by the rotation of the rotating blade 36 are thrown into the rear side of the grain bin 4. Figure 4 In the example shown, the discharge section 35 discharges grains in an upward and rearward direction. A portion of the grains conveyed by the transverse feed section 32 becomes the object of measurement by the measuring device S.

[0134] (Measuring device)

[0135] like Figures 3-5 As shown, the measuring device S is disposed inside the grain bin 4, and more specifically, around the discharge section 35. The measuring device S measures the state of the grains conveyed to the grain bin 4. The measuring device S includes a flow measuring device S1 for measuring the flow rate of the grains conveyed to the grain bin 4 and a taste measuring device S2 for measuring grain components such as moisture and protein.

[0136] (Unloader)

[0137] like Figure 1 and Figure 2 As shown, unloader A discharges the grains stored in the grain bin 4 from the discharge port A3. Unloader A includes: a longitudinal feed screw conveyor A1, which longitudinally feeds the grains that have been conveyed to the outside of the grain bin 4 by the bottom agitator 4S; and a transverse feed screw conveyor A2, connected to the longitudinal feed screw conveyor A1, which transversely feeds the grains conveyed by the longitudinal feed screw conveyor A1 toward the discharge port A3. Unloader A is configured to rotate about an upper and lower axis centered on the longitudinal feed screw conveyor A1.

[0138] In the combine harvester 100 described above, the internal maintenance of the grain bin 4 is performed regularly. As mentioned earlier, the grain bin 4 includes a discharge section 35 for discharging grains and a measuring device S for measuring the state of the grains; these are also objects of maintenance. The structure of the grain bin 4 and its surroundings will be described in detail below.

[0139] (The grain bin and its surrounding structure)

[0140] like Figure 1 and Figure 2 As shown, the grain bin 4 is configured to rotate left and right about a vertical axis located on its rear side. Therefore, the grain bin 4 is configured to change position between a working position and a maintenance position. The working position is when the grain bin 4 is adjacent to the threshing device 2 and can receive grains from the threshing device 2. The maintenance position is when the grain bin 4 is separated from the threshing device 2 and extends from the machine frame F, allowing the right side of the threshing device 2 to open. In the maintenance position, maintenance of the threshing device 2, the unloader A, and other peripheral equipment of the grain bin 4 can be performed appropriately. It should be noted that, unless otherwise stated, the following description focuses on the grain bin 4 being in the working position.

[0141] like Figure 1As shown, the grain bin 4 is formed in a box shape with its length along the rear-to-rear direction. The grain bin 4 is configured to include a top plate 4C and a plurality of side walls 4W extending downward from the edge of the top plate 4C. The grain bin 4 has an internal space formed by the top plate 4C and the plurality of side walls 4W.

[0142] A sloping portion 4Ca of the top plate 4C is formed at the rear of the top plate 4C, which slopes downwards and outwards (see reference). Figure 4 Therefore, interference between the unloader A and the grain bin 4 can be suppressed when the unloader A, which is located on the rear side of the grain bin 4, rotates.

[0143] The plurality of side walls 4W include: a front side wall 4Wf, disposed in front of the grain bin 4; an outer side wall 4Wo, disposed on the opposite side of the threshing device 2 in the left-right direction; an inner side wall 4Wi, disposed opposite to the outer side wall 4Wo in the left-right direction; and a rear side wall 4Wr, disposed opposite to the front side wall 4Wf in the front-back direction.

[0144] The front side wall 4Wf is arranged adjacent to the driver's compartment D in the longitudinal direction. The inner side wall 4Wi is arranged adjacent to the threshing device 2 in the lateral direction. The rear side wall 4Wr is arranged adjacent to the unloader A in the longitudinal direction. The outer side wall 4Wo is a part of the outermost outer portion arranged in the lateral direction of the combine harvester 100.

[0145] like Figure 3 and Figure 6 As shown, the grain bin 4 includes: a lower bin section 4L, which is narrow at the bottom and is equipped with a bottom stirring cage 4S for discharging stored grains from the grain bin 4; and an upper bin section 4U, which is located above the lower bin section 4L. The upper bin section 4U is composed of a top plate 4C and multiple side walls 4W.

[0146] like Figures 4-6 As shown, the outer wall 4Wo of the grain bin 4, which is located on the opposite side of the threshing device 2 in the left-right direction, has: an inspection port 41, which is partially open in the front-back direction of the outer wall 4Wo; and a door 43 for opening and closing the inspection port 41.

[0147] The inspection port 41 is formed in a longitudinal shape along the vertical direction. This allows the operator to enter and exit the grain bin 4 without strain during internal maintenance. In this embodiment, the inspection port 41 is formed from the upper part of the portion constituting the outer side wall 4Wo in the upper box section 4U to the lower part.

[0148] like Figure 4 and Figure 5As shown, a discharge section 35 for discharging grains from the threshing device 2 is provided inside the grain bin 4. The discharge section 35 is located in the front region of the grain bin 4. As described above, in this embodiment, the discharge section 35 is configured to throw grains to the rear side via rotating blades 36. Therefore, by placing such a discharge section 35 in the front region of the grain bin 4, grains can be thrown from the front region to the rear side, and grains can be stored inside the grain bin 4 without any dead angles. However, this structure is not limited to this one; the discharge section 35 may also be located in the middle region in the front-to-back direction.

[0149] like Figure 4 As shown, the inspection port 41 is positioned so as not to overlap with the discharge section 35 when viewed from the side. This allows the operator to access the interior of the grain bin 4 during internal maintenance, utilizing the ample space free from the discharge section 35 and surrounding measuring devices S. In this embodiment, the inspection port 41 is positioned in the rear region of the outer wall 4Wo. However, the inspection port 41 can be positioned so as not to overlap with the discharge section 35 when viewed from the side; for example, it could be positioned in the front or middle region of the outer wall 4Wo.

[0150] like Figure 4 As shown, door 43 is formed to be larger than inspection port 41. Furthermore, as... Figure 5 and Figure 7 As shown, the door 43 is configured to open inwards, and it abuts against the edge 42 of the inspection port 41 from the inside of the grain bin 4 to close the inspection port 41. Therefore, even if the pressure acting towards the outside of the grain bin 4 increases due to the grains accumulated inside the grain bin 4, the door 43 can be prevented from falling off due to the pressure.

[0151] In this embodiment, the door 43 is configured as a single-opening hinged door, with its rear portion supported by a hinge portion 43E that allows it to swing freely about an upper and lower axis. This ensures a large internal space for the grain bin 4 when the door 43 is opened, given that the inspection port 41 is located in the rear region of the outer side wall 4Wo. However, this configuration is not limited to this structure; the door 43 may also be a structure where its front portion is supported by the hinge portion 43E. Furthermore, the door 43 is not limited to a single-opening type and may also be configured as a double-opening hinged door.

[0152] like Figure 7 As shown, door 43 has a face 43A disposed in the same plane as the outer surface 4F of the outer wall 4Wo and a curved portion 43B that bends inward toward the grain bin 4. Face 43A occupies most of door 43. Therefore, door 43 is disposed in the same plane as the outer surface 4F of the outer wall 4Wo.

[0153] Door 43 has an abutting portion 43C that abuts against the edge portion 42 of inspection port 41. The abutting portion 43C and the curved portion 43B are continuously formed and configured to face the edge portion 42 of inspection port 41. Thus, the abutting portion 43C and the edge portion 42 can abut against each other. In this embodiment, when door 43 is closed, the abutting portion 43C abuts against the edge portion 42 via the sealing member 99. Furthermore, in... Figure 7 In the example shown, a pair of sealing members 99 are provided so that they clamp into the abutment portion 43C from the left and right directions when the door 43 is closed.

[0154] The abutting portion 43C abuts against the edge portion 42 from the inside of the grain bin 4. In this embodiment, the abutting portion 43C is provided around the entire periphery of the door 43 and abuts against the edge portion 42.

[0155] like Figure 6 and Figure 7 As shown, a recess 43D is formed on the door 43, recessed towards the inner side of the grain bin 4. A handle 44 for opening and closing the door 43 is provided in the recess 43D. In this embodiment, the handle 44 is configured as a rod. However, it is not limited to this structure, and the handle 44 may also be configured as a spoke type.

[0156] like Figure 8 As shown, the recess 43D is formed into an inwardly narrow shape that narrows towards the inside. In this embodiment, the recess 43D has: a handle mounting portion 43Da, which is parallel to the face portion 43A and disposed on the inner side of the grain bin 4 closer to the face portion 43A than the face portion 43A; and an inclined portion 43Db, which is inclinedly connected to the face portion 43A from the upper and lower edges of the handle mounting portion 43Da, respectively. Thus, the recess 43D becomes an inwardly narrow shape that narrows towards the inside of the grain bin 4 in the vertical direction. A handle 44 is provided through the handle mounting portion 43Da.

[0157] like Figure 9 As shown, multiple ribs 46 are formed on the inner side of the grain bin 4 in the door 43. This improves the durability of the door 43 against the pressure inside the grain bin 4.

[0158] The plurality of ribs 46 are configured to have a plurality of longitudinal ribs 46A formed in the vertical direction and a plurality of transverse ribs 46B formed in the horizontal direction. In the illustrated example, four longitudinal ribs 46A are formed on the inside of the door 43, and two transverse ribs 46B are formed on the inside of the door 43.

[0159] Two of the plurality of longitudinal ribs 46A are disposed at the position sandwiching the recess 43D. In this embodiment, a pair of longitudinal ribs 46A disposed at the position sandwiching the recess 43D constitute a part of the recess 43D. That is, as Figure 7 and Figure 8As shown, in this embodiment, the recess 43D is configured to include: a handle setting portion 43Da, a pair of inclined portions 43Db that are continuous with the upper and lower edges of the handle setting portion 43Da, and a pair of longitudinal ribs 46A (a portion of the pair of longitudinal ribs 46A) that are continuous with the side edges of the handle setting portion 43Da.

[0160] like Figure 8 As shown, the handle setting portion 43Da and a pair of inclined portions 43Db are configured as a curved plate, thereby forming a continuous structure in the vertical direction. Furthermore, the side edges of this plate are each covered by a pair of longitudinal ribs 46A formed on the inner side of the door 43, thereby forming a recess 43D.

[0161] like Figure 9 As shown, multiple horizontal ribs 46B are respectively disposed on the upper and lower edges of the door 43. In this embodiment, the horizontal ribs 46B disposed on the upper edge of the door 43 are connected to the upper ends of all the longitudinal ribs 46A. Furthermore, the horizontal ribs 46B disposed on the lower edge of the door 43 are connected to the lower ends of all the longitudinal ribs 46A. In other words, a pair of horizontal ribs 46B are configured to clamp the longitudinal ribs 46A from the vertical direction.

[0162] like Figures 7-9 As shown, a locking mechanism 5 is provided inside the grain bin 4 to lock the door 43 when it is closed. In this embodiment, the handle 44 for opening and closing the door 43 is configured to be linked with the locking mechanism 5. Thus, the locking mechanism 5 can be operated from the outside of the door 43 via the handle 44.

[0163] The locking mechanism 5 includes a locking bar 53 located inside the door 43, and a fixing support 54 located inside the outer wall 4Wo to fix the locking bar 53. By fixing the locking bar 53 to the fixing support 54, the door 43 is locked.

[0164] Furthermore, the locking mechanism 5 includes: a bearing portion 51 that rotatably supports the handle shaft portion 44A that passes through the handle mounting portion 43Da; and a connecting member 52 that is connected to the handle shaft portion 44A and to the locking rod 53. In this embodiment, the handle shaft portion 44A (handle 44) and the connecting member 52 are fixed together by bolts and rotate together integrally. Furthermore, the connecting member 52 and the locking rod 53 are fixed together by welding and rotate together integrally. Therefore, the handle 44 and the locking rod 53 are configured to rotate integrally about the axis of the handle shaft portion 44A via the connecting member 52 (see reference). Figure 9 ).

[0165] like Figure 9As shown, in this embodiment, when the handle 44 is in a horizontal position, the locking bar 53 is in a locked position along the horizontal direction. More specifically, when the handle 44 is in a horizontal position extending rearward from the rotation axis, the locking bar 53 is in a locked position extending forward along the horizontal direction from the rotation axis.

[0166] Furthermore, when the handle 44 is in a vertical position, the locking bar 53 is in a locked-out position along the vertical direction. More specifically, when the handle 44 is in a vertical position extending upward from the axis of rotation, the locking bar 53 is in a locked-out position extending downward from the axis of rotation along the vertical direction.

[0167] like Figure 8 and Figure 9 As shown, in this embodiment, the fixing support 54 is positioned above the locking rod 53. Furthermore, the fixing support 54 is secured by bolts via an adjustment elongated hole 55 formed in the left-right direction (see reference). Figure 8 Therefore, the position of the fixing support 54 can be adjusted in the left and right directions. The fixing support 54 has a protrusion 54A that protrudes downward at a position spaced apart from the outer side wall 4Wo towards the inner side of the grain bin 4.

[0168] When the locking bar 53 is in the unlocked position, and the door 43 swings from the open position to the closed position ( Figure 5 (The solid line indicates the closed position, and the imaginary line indicates the open position). The locking bar 53 is positioned on the outer side 4Wo, closer to the protrusion 54A of the fixing support member 54. When the operating handle 44 moves the locking bar 53 from this position to the locked position, the locking bar 53 is clamped from both sides in the left and right directions by the outer side wall 4Wo and the protrusion 54A of the fixing support member 54 (see reference). Figure 8 As a result, the swing of the locking bar 53 is restricted, and the door 43 is in a locked state where the swing in the opening direction is restricted.

[0169] It should be noted that by adjusting the position of the fixing support 54 in the left-right direction through the elongated hole 55, the degree of locking of the door 43 can be adjusted. For example, by positioning the fixing support 54 closer to the right side (outer wall 4Wo side), the locking rod 53 and the protrusion 54A can be brought into strong contact, thereby achieving a locking state that more effectively suppresses the swinging of the door 43.

[0170] In addition, such as Figure 8As shown, the fixing support 54 includes a locking bar guide 54B that guides the locking bar 53 as it changes from a locked-out position to a locked position. This makes it easier to lock the door 43. In this embodiment, the locking bar guide 54B is formed on a portion of the protrusion 54A and slopes upward toward the outer wall 4Wo from the lower end of the protrusion 54A.

[0171] like Figure 8 and Figure 9 As shown, the grain bin 4 has a support mechanism 6 inside that supports the door 43 when it is closed. The support mechanism 6 has a support rod 61 disposed inside the door 43, and a support member 62 disposed inside the outer wall 4Wo, which supports the support rod 61. The support rod 61 is supported by the support member 62, thereby supporting the door 43.

[0172] The support rod 61 is provided such that it passes through a pair of longitudinal ribs 46A forming the recess 43D in the front-rear direction. In this embodiment, the support rod 61 passes through a pair of longitudinal ribs 46A forming the recess 43D in a horizontal position.

[0173] A support member 62 is disposed below the support rod 61. Furthermore, the support member 62 is formed as a protrusion extending from the outer side wall 4Wo toward the inner side of the grain bin 4. In this embodiment, the support member 62 is configured to support the support rod 61 from below.

[0174] When the door 43 swings from the open position to the closed position, the support rod 61 is positioned in a supported position that overlaps with the support member 62 when viewed from above. Furthermore, in this state, the support rod 61 contacts the support member 62 from above. Thus, the support member 62 supports the support rod 61 from below, and the closed door 43 is supported by the support rod 61.

[0175] It should be noted that, as Figure 8 As shown, the support member 62 includes a support rod guide 62A, which guides the support rod 61 to the supported position during the swinging motion of the door 43 from the open position to the closed position. In this embodiment, the support rod guide 62A is formed as a part of the support member 62 and tilts upward from the inner end of the grain bin 4 in the support member 62 toward the outer wall 4Wo. Therefore, even if, for example, the door 43 tilts downward due to its own weight, the support rod guide 62A can temporarily lift the door 43, allowing the door 43 to be positioned appropriately as the closed position.

[0176] like Figure 7 and Figure 9As shown, a door stop mechanism 7 is provided inside the grain bin 4. This door stop mechanism 7 prevents the door 43, which opens inwards towards the grain bin 4, from interfering with the grain bin 4 due to excessive opening. In this embodiment, the door stop mechanism 7 is provided at both the top and bottom of the inside of the grain bin 4. The door stop mechanism 7 has: a stop member 71, which prevents the door 43 from being excessively opened; and a stop member bearing portion 73, which contacts the stop member 71 at the extreme position of the door 43 opening (see also...). Figure 5 ).

[0177] A stop member 71 is provided on the outer side wall 4Wo. In this embodiment, the stop member 71 is provided on the outer side wall 4Wo via a stop member support portion 72. The portion of the stop member 71 that contacts the stop member bearing portion 73 is arranged to face forward. The stop member 71 is preferably made of, for example, rubber, and has a cushioning effect.

[0178] A stop-support portion 73 is provided on the door 43 side. In this embodiment, the stop-support portion 73 is provided on the hinge portion 43E that swings freely to support the door 43. The stop-support portion 73 is configured to rotate freely about the upper and lower axes of the hinge portion 43E, and rotate integrally with the door 43. Figure 7 As shown, in this embodiment, the stop-bearing portion 73 is formed in the shape of a plate and abuts against a portion (two in this example) of a plurality of longitudinal ribs 46A when the door 43 is closed. More specifically, one surface of the stop-bearing portion 73 abuts against two longitudinal ribs 46A. The other surface of the stop-bearing portion 73 contacts the stop 71 at the extreme position of the door 43 when it is open (see reference). Figure 5 By bringing the stop support portion 73 into contact with the longitudinal rib portion 46A, the durability of the stop support portion 73 when in contact with the stop member 71 can be improved.

[0179] like Figure 6 As shown, the outer wall 4Wo has a monitoring window 45 with an opening in the outer wall 4Wo and a small door 45A for opening and closing the monitoring window 45. In this embodiment, the small door 45A is configured to be transparent or semi-transparent. Thus, even when the monitoring window 45 is closed by the small door 45A, the interior of the grain bin 4 can be monitored through the monitoring window 45. Furthermore, if necessary, internal maintenance of the grain bin 4 can be performed by opening the small door 45A. However, in this embodiment, the monitoring window 45 is formed to be smaller than the inspection port 41, and is configured so that the grain bin 4 cannot be entered or exited through the monitoring window 45. Thus, the area occupied by the opening portion of the outer wall 4Wo (inspection port 41, monitoring window 45) can be prevented from expanding beyond what is necessary, thereby preventing a decrease in the durability of the grain bin 4.

[0180] exist Figure 6In the example shown, the monitoring window 45 is positioned near the lower part of the inspection port 41. This allows for easy monitoring of the state of the area near the lower part of the inspection port 41 inside the grain bin 4. For example, when opening the door 43, which is in the closed position of the inspection port 41, factors such as blockages caused by stored grains that might prevent the door 43 from opening can be identified before opening the door 43. Furthermore, in such cases, opening the small door 45A that closes the monitoring window 45 can also remove any grains that might cause blockages, thus eliminating factors that might prevent the door 43 from opening. For example, the lower part of the inspection port 41, where the monitoring window 45 is located, is preferably positioned at the line of sight of an operator not riding the combine harvester 100 (e.g., an operator standing in the field). This allows the operator to monitor the interior of the grain bin 4 from the monitoring window 45 while standing.

[0181] In this embodiment, the small door 45A is configured as a sliding type that slides in the vertical direction. This allows for a simple opening and closing structure for the monitoring window 45, which is opened and closed less frequently than the inspection port 41. However, this structure is not limited to this; the small door 45A can also be configured to slide in the front-back direction. Furthermore, the small door 45A can also be configured to remain closed and cannot be opened or closed. Even in this case, since the small door 45A is configured to be transparent or semi-transparent, the interior of the grain bin 4 can be monitored through the monitoring window 45.

[0182] like Figure 6 and Figure 10 As shown, the top plate 4C has a roof inspection port 47 opening in the top plate 4C and a cover 47A for opening and closing the roof inspection port 47. The roof inspection port 47 is located near the discharge section 35 located inside the grain bin 4. This allows for easy maintenance of the discharge section 35 and surrounding measuring devices S, etc., through the roof inspection port 47. In this embodiment, the roof inspection port 47 is located in the front region of the top plate 4C.

[0183] In this embodiment, the cover 47A is configured as a single-opening hinged door, with its rear supported by a cover hinge 47B that allows it to swing freely about a horizontal axis. Furthermore, the cover 47A is configured to be transparent or semi-transparent. Thus, even when the roof inspection opening 47 is closed by the cover 47A, the interior of the grain bin 4 can be visually inspected through the roof inspection opening 47.

[0184] A reinforcing member 48 is provided on the rear side of the ceiling inspection port 47 to strengthen the ceiling inspection port 47. The reinforcing member 48 is formed as a rib along the left-right direction. Here, as mentioned above, in this embodiment, the discharge section 35 is configured to discharge grains in an upward and rearward direction. For example, if the reinforcing member 48 is provided on the inner surface of the top plate 4C, the reinforcing member 48 will protrude downward from the inner surface of the top plate 4C. In this case, the reinforcing member 48 will obstruct the grains discharged in an upward and rearward direction, which may result in the grains not being easily stored in the rear area of ​​the grain bin 4. Therefore, in this embodiment, the reinforcing member 48 is provided on the outer surface of the top plate 4C. As a result, the reinforcing member 48 will not obstruct the discharged grains, thus suppressing the situation where the grains are not easily stored in the rear area of ​​the grain bin 4.

[0185] like Figure 6 As shown, a lower cover 8 protecting the lower housing portion 4L is provided on the outer side of the lower housing portion 4L in the left-right direction. The upper and lower parts of the lower cover 8 are connected to the lower housing portion 4L. The upper part of the lower cover 8 is configured to be freely attached to and detached from the lower housing portion 4L via the connecting mechanism 9 described later. Furthermore, the lower cover 8 is configured to swing about the lower part of the lower cover 8 connected to the lower housing portion 4L as the rotation center when the upper part of the lower cover 8 is detached from the lower housing portion 4L.

[0186] The lower cover 8 has: a wall portion 8A disposed on the same plane relative to the outer wall 4Wo; and an inclined portion 8B continuously formed with the lower end of the wall portion 8A, inclined inward in a downward direction (see also...). Figure 3 ).

[0187] like Figure 11 and Figure 12 As shown, the lower cover 8 has a connecting mechanism 9 that can connect to and disconnect from the lower box section 4L. Figure 6 In the example shown, a pair of connecting mechanisms 9 are provided at a distance from each other in the front-back direction.

[0188] like Figure 11 and Figure 12 As shown, the connecting mechanism 9 has a pair of hooks 92 and locking pieces 93 that can be engaged with a rod 97 provided on the lower box portion 4L. The pair of hooks 92 and locking pieces 93 are provided on the inner side of the wall portion 8A of the lower cover 8.

[0189] A handle portion 91 is provided on the outer side of the wall surface 8A. The handle portion 91 is configured to be linked with a pair of hooks 92. When the handle portion 91 is swung upward, the pair of hooks 92 swing downward. By swinging the handle portion 91 from the state where the pair of hooks 92 are locked to the bar 97, the pair of hooks 92 swing downward, releasing the lock from the bar 97. Furthermore, by swinging the entire lower cover 8 outward in the left-right direction, the locking piece 93 that is locked to the bar 97 also disengages, and the connection achieved by the connecting mechanism 9 is released.

[0190] Thus, the lower cover 8 is configured to swing, so even when the wall surface 8A is connected to the lower box portion 4L, the wall surface 8A may be offset relative to the outer wall 4Wo in the swing direction. In this case, sometimes the wall surface 8A and the outer wall 4Wo are not on the same plane.

[0191] Therefore, in this embodiment, as Figure 12 As shown, the connecting mechanism 9 is configured to adjust the angle of the lower side cover 8.

[0192] like Figure 11 As shown, the connecting mechanism 9 includes: a U-shaped bracket 95 with angular edges on the outer surface of the lower housing portion 4L; and plate-shaped connecting portions 96 respectively provided at both ends of the bracket 95 in the front-rear direction. A pair of connecting portions 96 are configured to protrude outwards in the left-right direction. A rod 97 is configured to pass through a pair of connecting portions 96 in the front-rear direction. Furthermore, as described above, the connecting mechanism 9 is connected by engaging a pair of hooks 92 and a locking piece 93 provided on the lower cover 8 side with the rod 97.

[0193] The bracket 95 and the connecting portion 96 are connected by a bolt 98 that integrally passes through them in the front-rear direction. An adjustment elongated hole 96A is formed in the through portion of the bolt 98 in the connecting portion 96, extending in a direction perpendicular to the inclined portion of the lower box portion 4L. The bolt 98 passes through the connecting portion 96 by passing through the adjustment elongated hole 96A in the front-rear direction. Therefore, the connection position of the connecting portion 96 with the bracket 95 can be adjusted in the direction of the extension of the adjustment elongated hole 96A. Thus, the arrangement position of the rod 97, which is set to pass through a pair of connecting portions 96, can also be adjusted in the direction of the extension of the adjustment elongated hole 96A, and the connection position of the rod 97 with the wall surface 8A (specifically, a pair of hooks 92 and a locking piece 93). Therefore, the overall angle of the lower cover 8 can be adjusted, and the wall surface 8A and the outer wall 4Wo can be easily arranged on the same plane.

[0194] (Other embodiments of Implementation 1)

[0195] Hereinafter, other embodiments of the combine harvester of Embodiment 1 will be described.

[0196] (1) In the above embodiment, an example was described in which the door 43 abuts against the edge 42 of the inspection port 41 from the inside of the grain bin 4. However, the door 43 may also abut against the edge 42 of the inspection port 41 from the outside of the grain bin 4.

[0197] (2) In the above embodiment, an example in which the door 43 is formed to be larger than the inspection opening 41 has been described. However, the door 43 may also be formed to be smaller than the inspection opening 41 in such a way that it does not abut against the edge portion 42 of the inspection opening 41. In this case, it is ideal to provide a door abutment portion at the edge portion 42 of the inspection opening 41, which is configured to abut against the door 43 in the closed position, and to provide a sealing member to close the gap caused by the size difference between the inspection opening 41 and the door 43 when the door 43 is closed.

[0198] (3) In the above embodiment, an example of a single-opening hinged door with the door 43 supported by the hinge portion 43E has been described. However, the door 43 may also be configured as a sliding door or a folding door or a sliding door with a linkage.

[0199] (4) In the above embodiment, an example where the door 43 is elongated has been described. For example, as shown in... Figure 13 As shown, the upper edge of the door 43 can be inclined parallel to the inclined portion 4Ca of the top plate formed on the upper surface of the grain bin 4. With this structure, the size of the door 43 is more easily ensured compared to a rectangular door.

[0200] (5) In the above embodiment, an example of a monitoring window 45 opening in the outer side wall 4Wo has been described. Multiple monitoring windows 45 may also be opened in the outer side wall 4Wo. For example, as... Figure 14 As shown, a pair of monitoring windows 45 can also be opened at a distance between them in the vertical direction on the outer wall. In this case, it is also preferable that the monitoring window 45 on the lower side is positioned at the operator's eye level.

[0201] (6) In the above embodiment, an example was described in which the stop member 71, which is the door stop mechanism 7, is provided on the side of the outer wall 4Wo and the stop member receiving part 73 is provided on the side of the door 43. However, their positions can also be reversed. That is, the stop member 71 can be provided on the side of the door 43 and the stop member receiving part 73 can be provided on the side of the outer wall 4Wo. In addition, for example, the stop member 71 can be provided on the inner side of the door 43 away from the swing axis (for example, near the locking mechanism 5) and the stop member receiving part 73 can be provided on the inner side of the rear side wall 4Wr.

[0202] (7) In the above embodiment, an example of the door 43 being configured to open by swinging about the vertical axis via the hinge portion 43E has been described. However, the door 43 may also be configured to swing about the horizontal axis and open in the vertical direction.

[0203] (8) In the above embodiment, an example of an inspection port 41 partially opening in the front-rear direction of the outer wall 4Wo has been described. However, the inspection port 41 may also be entirely open in the front-rear direction of the outer wall 4Wo. In this case, the door 43 is also inwardly opening and is configured to abut against the edge 42 of the inspection port 41 from the inside of the grain bin 4 to close the inspection port 41.

[0204] (9) In the above embodiment, an example of the inspection port 41 being formed as a longitudinal shape along the vertical direction has been described. However, the inspection port 41 may also be formed as a square or as a transverse shape along the front-back direction.

[0205] (Implementation Method 2)

[0206] Hereinafter, based on the accompanying drawings, we will describe the application of Embodiment 2 of the present invention to a combine harvester, which is an example of a harvester. Figure 15 This is a side view showing the overall structure of the combine harvester according to Embodiment 2. Figure 16 This is a top view showing the overall structure of the combine harvester according to Embodiment 2. Figure 15 , 16 The direction of [F] is defined as the front of the vehicle body 101, and the direction of [B] is defined as the rear of the vehicle body 101. Figure 16 The direction of [L] is defined as the left side of the traveling body 101, and the direction of [R] is defined as the right side of the traveling body 101.

[0207] like Figure 15 , 16As shown, the combine harvester includes a traveling body 101 equipped with a pair of left and right tracked traveling devices 102. A driver's compartment 103 is formed on the right side of the front portion of the traveling body 101. The driver's compartment 103 is covered by a cab 104. A power unit (not shown) is formed below the driver's compartment 103. An engine (not shown) is installed in the power unit. A threshing device 106 and a threshing box 107 serving as a storage compartment are provided at the rear of the traveling body 101. The threshing device 106 and the threshing box 107 are arranged in the transverse width direction of the traveling body 101 with the threshing box 107 located behind the driver's compartment 103. A stalk shredder 108 is provided at the rear of the threshing device 106. A harvesting conveyor 109 extends forward from the threshing device side of the front portion of the traveling body 101. The harvesting and conveying device 109 includes a conveying section 110 and a harvesting section 111 that extend forward from the traveling body 101 and can be oscillating up and down. The rear of the harvesting section 111 is connected to the front of the conveying section 110. By oscillating the conveying section 110, the harvesting section 111 is raised and lowered between a lowering working state and an upward non-working state.

[0208] In a combine harvester, by lowering the harvesting section 111 to a lowering operation state and moving the traveling body 101 in this state, harvesting operations for crops such as rice, wheat, and soybeans can be performed. Specifically, in the harvesting section 111, the tip side of the standing rice stalks located in front of the traveling body is raked backward by a rotating reel 112, and the root side of the standing rice stalks is cut by the harvesting device 113, thus harvesting the standing rice stalks as crops. Then, the entire harvested rice stalk from root to tip is conveyed backward by the conveying sections 110 of the screw conveyor 114 and supplied to the threshing unit 106. In the threshing unit 106, the harvested rice stalks are threshed, and the threshed grains are sorted to separate them from dust. The threshed waste stalks are shredded by the waste stalk shredder 108. The shredded straw is guided by the discharge mask 108a located at the lower part of the waste straw chopping device 108 and discharged towards the rear of the traveling body 101. The sorted threshed grains are fed to the threshing box 107 for storage via the winnowing device 117. The threshed grains stored in the threshing box 107 can be removed from the threshing box 107 via the threshing discharge device 116.

[0209] (Structure of threshing device 106)

[0210] like Figure 17 As shown, the threshing device 106 includes a threshing body 120. A threshing section 106A is formed in the upper part of the threshing body 120, and a sorting section 106B is formed in the lower part of the threshing body 120. An inspection port 150 opens at the rear of the threshing body 120.

[0211] like Figure 17As shown, in the threshing section 106A, harvested rice stalks supplied to the front end of the threshing chamber 121 via the conveying section 110 are raked towards the rear of the threshing cylinder 122 by the rake section 122a in the threshing cylinder 122 and supplied to the threshing processing section 122b in the threshing cylinder 122. The rice stalks supplied to the threshing processing section 122b are threshed by the threshing teeth 123 and the receiving net 124. The threshed material, which is given rotational force by the threshing processing section 122b, comes into contact with the dust valve 125a supported on the top plate 125 and is guided by the dust valve 125a to flow towards the rear of the threshing chamber 121. The threshed material is moved towards the rear of the threshing chamber 121 and threshed. The threshed grains obtained by the threshing process fall through the processing material drain hole of the receiving net 124 into the sorting section 106B. The threshing dust generated during the threshing process is discharged from the dust outlet 126 located at the rear of the threshing chamber 121. The threshing dust discharged from the threshing chamber 121 flows into the waste stalk shredding device 108 from the outlet 127, which also serves as an inspection port 150.

[0212] The sorting unit 106B includes a sorting chamber 130. The sorting chamber 130 is formed inside the threshing machine body 120 via the left and right side walls, etc. The sorting chamber 130 is provided with a sorting frame 131. The sorting frame 131 is swayably supported by a support 132 acting on the front of the sorting frame 131 and a drive mechanism 133 connected to the rear of the sorting frame 131, and is swayed by the drive mechanism 133. Inside the sorting frame 131 are supported a grain tray 134a, a sieve section 134, a first chaff sieve 135, a grain sieve 136, and a second chaff sieve 137. A fan 138 is provided below the front of the sorting frame 131. Sorting air is supplied to the rear of the sorting chamber 130 by the fan 138. The threshed material leaking from the receiving net 124 is shaken by the grain disc 134a, the sieve section 134, the first chaff sieve 135, the grain sieve 136, and the second chaff sieve 137, and is sorted into grains and stalk dust by the sorting air from the blower 138.

[0213] A first recovery section 139 and a second recovery section 140 are provided below the sorting frame 131. In this embodiment, the first recovery section 139 and the second recovery section 140 are composed of screw conveyors. Fine grains, which are the first processed material, sorted by the first chaff screen 135 and grain screen 136 of the sorting frame 131, fall into the first recovery section 139 and are recovered, then discharged to the outside of the threshing machine body 120 through the first recovery section 139. The discharged fine grains are received by the winnowing device 117 and conveyed to the threshing box 107 through the winnowing device 117. Unprocessed grains, which are the second processed material, sorted by the second chaff screen 137 of the sorting frame 131, fall into the second recovery section 140 and are recovered, then discharged to the outside of the threshing machine body 120 through the second recovery section 140. The discharged unprocessed grains are received by the return device 141 and conveyed to the front of the sorting chamber 130 through the return device 141, and then returned to the front of the sorting frame. The rod chips and other sorting dust separated in the sorting box 131 are discharged from the outlet 127 and flow into the waste rod shredding device 108.

[0214] (Adjustment of the opening of the first glume sieve 135)

[0215] like Figure 19 , 20 As shown, the first chaff screen 135 is composed of a plurality of screen plates 135a arranged at intervals in the front-back direction of the sorting frame 131. The gaps between the screen plates 135a serve as drainage holes for the processed material.

[0216] The upper end of each sieve plate 135a is supported by the support portion 131a of the sorting frame 131 via the fulcrum shaft 143. Each sieve plate 135a is supported by the sorting frame 131 in a state where it can swing back and forth with the fulcrum shaft 143 as the swing fulcrum. The lower end of each sieve plate 135a is connected to the linkage rod 144. The sieve plate 135a and the linkage rod 144 are rotatably connected relative to each other via the connecting pin 144a. Multiple sieve plates 135a are linked together by the linkage rod 144 and can swing in the same swing direction relative to the sorting frame 131.

[0217] An opening adjustment section 145 is provided on the right lateral outer side (threshing box side) of the sorting frame 131. The opening adjustment section 145 is supported by the sorting frame 131 via a fulcrum shaft 146 and can swing back and forth with the fulcrum shaft 146 as the swing fulcrum. The fulcrum shaft 146 of the opening adjustment section 145 and the fulcrum shaft 143 of the sieve plate 135a are composed of the same fulcrum shaft. The movable end of the opening adjustment section 145 is linked to the linkage rod 144 via a linkage shaft 147. The linkage shaft 147 passes through an elongated through hole 148 formed in the sorting frame 131.

[0218] When the opening adjustment unit 145 is oscillating, the oscillation force of the opening adjustment unit 145 is transmitted to the linkage rod 144 through the linkage shaft 147, causing the linkage rod 144 to move in the forward and backward direction. As the linkage rod 144 moves in the forward and backward direction, multiple screen plates 135a oscillate in the forward and backward direction around the fulcrum shaft 143, causing a change in the width of the gap between the screen plates 135a. That is, the opening of the material discharge hole changes.

[0219] like Figure 20 , 23 As shown, the opening adjustment unit 145 is linked to the remote operation device 160 via the operation cable 149. Figure 18 , 20 As shown, the remote operation device 160 is located at the rear of the threshing chamber 107. The operation cable 149 passes through the sorting chamber 130 from the opening adjustment section 145 to the rear of the threshing machine body 120, and then through the inspection port 150 at the rear of the threshing machine body 120 to the outside of the threshing machine body 120, reaching the remote operation device 160.

[0220] like Figure 15 , 16 As shown in Figure 18, the threshing discharge device 116 includes a longitudinal discharge device 116a and a transverse discharge device 116b. The longitudinal discharge device 116a is provided at the rear of the threshing box 107, extending in the vertical direction of the traveling body 101. The transverse discharge device 116b extends from the upper end of the longitudinal discharge device 116a. Figure 18 , 23 As shown, a support column 151 is erected on the side of the longitudinal discharge device 116a, within the body frame 101a. A support arm 152 extends from the support column 151 toward the longitudinal discharge device 116a. A holding member 153 that holds the longitudinal discharge device 116a is supported by the extended end of the support arm 152. The longitudinal discharge device 116a is supported by the support column 151 via the holding member 153 and the support arm 152. Figure 18 , 23 The 154 shown is a reinforcing member that is connected to the threshing device 106 and the support column 151 to strengthen the support column 151. The reinforcing member 154 is connected to the support column 151 via a connecting member 151a. The end of the reinforcing member 154 is connected to the support arm 152 via a connecting member 152a. Figure 18 The 155 shown is an electric motor that rotates the gear 116c of the longitudinal discharge device 116a and rotates the threshing discharge device 116.

[0221] like Figure 18 , 23As shown, the remote operation device 160 is supported by a support column 151. The remote operation device 160 is firmly supported by the support column 151, which has high rigidity to support the longitudinal discharge device 116a. In this embodiment, the remote operation device 160 is supported by the support column 151 in a position located at the rear of the support column 151, but a structure in which it is supported on the side or front of the support column 151 may also be adopted.

[0222] like Figure 21 , 22 As shown, the remote operation device 160 includes an operation box 161. The operation box 161 includes a box body 161a and a cover box 161b. The cover box 161b is detachably supported on the box body 161a by connecting bolts 163, and can be opened and closed by disassembly. The remote operation device 160 is supported on the support column 151 by connecting the operation box 161 to the support portion 151b of the support column 151 using two mounting bolts 162. The two mounting bolts 162 pass through the through holes of the cover box 161b from the outside of the operation box 161 and enter the interior of the operation box 161, fastening the bottom of the box body 161a to the support portion 151b, thereby supporting the operation box 161 on the support portion 151b. A handle 162a is provided at the end of the mounting bolt 162 in a non-rotatable manner. The handle 162a is located on the outside of the operation box 161. By rotating the handle 162a, the mounting bolt 162 can be removed from the support 151b, and the operating box 161 can be removed from the support column 151 while the cover box 161b remains closed. The entire remote operating device 160 can then be removed from the support column 151.

[0223] like Figure 21 , 22 As shown, a motor 164 and an operating arm 165 are supported inside the main body 161a. The motor 164 and the operating arm 165 are linked together via a reduction gear 166 and a linkage gear 167. That is, the input part of the reduction gear 166 is linked to the output shaft of the motor 164, and the linkage gear 167 meshes with the output gear 166a of the reduction gear 166. The linkage gear 167 is supported on the rotating support shaft 165a of the operating arm 165 without relative rotation. The operating arm 165 is connected to an internal cable 149a of an operating cable 149. Figure 22 The 160a shown is a sensor that detects the swing angle of the manipulator 165.

[0224] In the remote operation device 160, the power of the motor 164 is reduced in speed by the reduction transmission mechanism 166 and transmitted to the linkage gear 167. The linkage gear 167 is rotated around the rotating pivot 165a. When the linkage gear 167 is rotated, the operating arm 165 is oscillated around the rotating pivot 165a via the power of the linkage gear 167, thereby stretching or loosening the internal cable 149a. When the internal cable 149a is stretched, the opening adjustment unit 145 resists the return spring 168 (see reference) by the tension of the internal cable 149a. Figure 20 , 23 When the internal cable 149a is loosened, the opening adjustment unit 145 is swung by the tension of the return spring 168.

[0225] That is to say, by operating the screen operation switch 169 located in the driver's compartment 103 (see...) Figure 15 The control device (not shown) operates based on information from the screen operation switch 169, and the motor 164 is controlled by the control device. This enables the remote operation device 160 to operate. The remote operation device 160 is operated remotely via the operation cable 149, allowing the opening adjustment unit 145 to swing and adjust the opening of the material discharge hole of the first chaff screen 135. It should be noted that the opening adjustment unit 145 is operated by electricity supplied from the remote operation device 160.

[0226] During cleaning and inspection of the first chaff screen 135, the second chaff screen 137, and the grain screen 136, the rotary cutter 108b and discharge mask 108a of the waste stalk chopping device 108 are removed, and the rear of the inspection port 150 is opened. By disengaging the sorting frame 131 from the support 132 and the drive mechanism 133, the sorting frame 131 can be removed from the inspection port 150 and taken outside the threshing machine body 120 (see reference). Figure 17 In this case, by removing the mounting bolt 162, the remote operating device 160 can be removed together with the sorting frame 131 while the operating cable 149 is still connected. Then, open the swingable cover 170 that covers the threshing box 107 and the remote operating device 160 from the rear, and open the rear of the remote operating device 160 (see reference). Figure 18 , 23 Since the remote operating device 160 and the operating cable 149 can remain connected, there is no need to perform linkage adjustment between the remote operating device 160 and the operating cable 149 after the sorting box 131 is returned from the inspection port 150 to the sorting chamber 130.

[0227] like Figure 18 , 23As shown, a fuel tank 105 for the engine is provided at the rear of the vehicle body 101, between the threshing device 106 and the threshing box 107. The lateral portion of the fuel tank 105 on the threshing box 107 side extends below the bottom 107a of the threshing box 107, which tapers at the lower end. A remote operation device 160 is located behind the fuel tank 105. It should be noted that... Figure 23 In the image, the fuel tank 105 is shown with a dashed line for ease of understanding.

[0228] (Other embodiments of embodiment 2)

[0229] In the above embodiment, the sorting box 131 is removed by taking the remote operating device 160 off the support 151, but the sorting box 131 can also be removed by disconnecting the remote operating device 160 from the operating cable 149.

[0230] (2) In the above embodiment, an example is shown in which a threshing box 107 is used as a storage unit for threshing, but a storage unit with a bagging box may also be used.

[0231] (3) In the above embodiment, an example is shown in which the remote operation device 160 is supported by the support column 151 of the longitudinal discharge device 116a, but a structure supported by a dedicated support member may also be adopted.

[0232] (4) In the above embodiment, an example is shown in which the remote operation device 160 is supported by the support column 151 in a state located at the rear side of the support column 151, but a structure located at the side or front side of the support column 151 may also be adopted.

[0233] (5) In the above embodiment, the second chaff screen 137 has an opening adjustment section, which is disposed on the left lateral side of the sorting frame 131 and has the same structure as the opening adjustment section 145 of the first chaff screen 135. It is configured to adjust the opening by manually operating the opening adjustment section. The second chaff screen 137 can also be configured to adjust the opening by using the same remote operating device as the first chaff screen 135.

[0234] (Implementation Method 3)

[0235] Hereinafter, based on the accompanying drawings, we will describe the application of Embodiment 3 of the present invention to a combine harvester, which is an example of a harvester. Figure 24 This is a left view showing the overall structure of the combine harvester according to embodiment 3. Figure 25 This is a top view showing the overall structure of the combine harvester according to embodiment 3. Figure 24 , 25 The direction of [F] is defined as the front of the vehicle body 201, and the direction of [B] is defined as the rear of the vehicle body 201. Figure 25 The direction of [L] is defined as the left side of the traveling body 201, and the direction of [R] is defined as the right side of the traveling body 201.

[0236] like Figure 24 , 25 As shown, the combine harvester includes a traveling body 201 equipped with a pair of tracked traveling devices 202 on the left and right sides. A driver's compartment 203 is formed on the right side of the front part of the traveling body 201. A driver's seat 204 is provided in the driver's compartment 203. The driver's compartment 203 is covered by a cab 205. A threshing device 206 and a threshing box 207 are provided at the rear of the traveling body 201. The threshing device 206 and the threshing box 207 are arranged in the transverse width direction of the traveling body 201 with the threshing box 207 located behind the driver's compartment 203. A stalk chopper 208 is provided at the rear of the threshing device 206. A harvesting conveyor 209 extends forward from the threshing device side of the front part of the traveling body 201. The harvesting and conveying device 209 includes: a conveying section 210 extending from the traveling body 201 in a manner capable of swinging forward and backward; and a harvesting section 211 disposed in front of the traveling body 201. The rear portion of the harvesting section 211 is connected to the front portion of the conveying section 210. The conveying section 210 is swung by the extension and retraction of the lifting cylinder 212, thereby the harvesting section 211 is raised and lowered between a lowering working state and an upward non-working state.

[0237] In a combine harvester, by lowering the harvesting section 211 to a lowering operation state and moving the traveling body 201 in this state, harvesting operations of crops such as rice, wheat, and soybeans can be performed. Specifically, in the harvesting section 211, the tip side of the standing rice stalks located in front of the traveling body is raked backward by a rotating reel 213, and the root side of the standing rice stalks is cut by the harvesting device 214, thus harvesting the standing rice stalks as crops. Then, the entire harvested rice stalk from root to tip is conveyed to the conveying section 210 via a screw conveyor 215. The harvested rice stalks conveyed to the conveying section 210 are then conveyed rearward through the conveying section 210 and supplied to the threshing device 206. In the threshing device 206, the harvested rice stalks are threshed by the threshing cylinder 206a, and the threshed grains are sorted to separate them from dust. The threshing waste stalks are shredded by the waste stalk shredder 208. The shredded stalks are guided by the discharge mask 208a located at the lower part of the waste stalk shredder 208 and discharged to the rear of the traveling body 201. The sorted threshed grains are fed to the threshing box 207 for storage via the winnowing device 216. The threshed grains stored in the threshing box 207 can be removed from the threshing box 207 via the threshing discharge device 217.

[0238] like Figure 24 , 25As shown, a ladder 218 is erected in front of the threshing device 206 on the machine frame 201a. The ladder 218 allows access to the threshing device 206. The support column of the ladder 218 is inclined along the front edge of the outer cover 219 that covers the threshing device 206 from the lateral outside of the traveling body. The upper end of the ladder 218 is at the same or approximately the same height as the upper end of the outer cover 219. A support member 220 extends from the ladder 218, and a rearview mirror 221 is supported on the extended end of the support member 220. The support member 220 is sway-operated on the ladder 218. When using the ladder 218, the support member 220 and the rearview mirror 221 can be separated from the ladder 218 by swaying the support member 220. The upper part of the ladder 218 and the support member 222 are connected by a reinforcing member 223. The support member 222 is located at the front of the threshing device 206 and is configured to support the horizontal conveyor section 217a in the threshing discharge device 217 in a retracted position. The ladder 218 is supported by the support member 222, which has high rigidity for supporting the horizontal conveyor section 217a, via the reinforcing member 223, and is firmly supported, making it less prone to swaying. As a result, the rearview mirror 221 is less likely to sway.

[0239] (Regarding the power transmission structure)

[0240] The engine 225 is located below the driver's seat 204 (see reference). Figure 26 Engine 225 outputs from shaft 225a (see reference). Figure 26 The mounting posture, extending in the lateral width direction of the vehicle body 201, is located on the right lateral side of the vehicle body 201. The power of the engine 225 is transmitted through... Figure 26 The power transmission structure shown transmits power to the tracked travel device 202, the threshing cylinder 206a of the threshing device 206, and the sorting section 206b, etc.

[0241] like Figure 26 As shown, the power from the output shaft 225a of the engine 225 is input to the travel gearbox 227 via the belt transmission mechanism 226, and output from the travel gearbox 227 to the drive wheels 202a of the left and right tracked travel devices 202. In the travel gearbox 227, the power from the engine 225 is input to the hydrostatic continuously variable transmission unit 227a, and the power after being changed by the hydrostatic continuously variable transmission unit 227a is transmitted to the distribution gearbox (not shown) via the auxiliary transmission unit (not shown), and output from the distribution gearbox to the left and right drive wheels 202a.

[0242] The power from the output shaft 225a of the engine 225 is transmitted via the belt transmission mechanism 228 to the bottom stirring cage 229 of the threshing box 207, and from the bottom stirring cage 229 to the longitudinal conveyor section 217b and the transverse conveyor section 217a of the threshing discharge device 217.

[0243] The power from the output shaft 225a of the engine 225 is transmitted via belt transmission mechanism 230a to the rotating support shaft 231a of the blower 231 in the sorting section 206b, and from the rotating support shaft 231a to the input shaft 232a of the threshing drum speed change device 232 via belt transmission mechanism 230b. The power from the output shaft 232b of the threshing drum speed change device 232 is transmitted via belt transmission mechanism 233 to the input shaft 234a of the threshing drum drive unit 234. The threshing drum speed change device 232 contains a gear transmission mechanism 235 that changes the rotational speed of the input shaft 232a and transmits it to the output shaft 232b. Figure 27 , 28 As shown in Figure 29, a speed change operation section 232c is provided at the front end of the threshing drum speed change device 232, protruding forward. In the threshing drum speed change device 232, by operating the speed change operation section 232c, the speed change gear 235a slides and alternately engages with the three transmission gears 235b, 235c, and 235d, switching between high, medium, and low speed levels, thereby changing the rotational speed of the output shaft 232b. The threshing drum speed change device 232 allows for three-level speed changes of the threshing drum 206a driven by the threshing drum drive unit 234.

[0244] The power from the input shaft 232a of the threshing drum speed changer 232 is transmitted via belt conveyor 236 to the first screw conveyor 237 and the second screw conveyor 238 of the sorting section 206b. The power from the first screw conveyor 237 is transmitted to the bucket conveyor section 216a and the screw conveyor section 216b of the winnowing device 216. The power from the belt conveyor 236 is transmitted via intermediate shaft 239 and belt conveyor 240 to the oscillating sorting device 241 of the sorting section 206b. The power from the second screw conveyor 238 is transmitted via chain conveyor 263 to the return device 264. The return device 264 returns the untreated particles from the second screw conveyor 238 to the oscillating sorting device 241. The power from the rotating support shaft 231a of the blower 231 is transmitted via belt conveyor 242, intermediate shaft 243, and belt conveyor 244 to the rotating blade 208b of the waste stalk shredder 208. Regardless of whether the threshing cylinder 206a is speed-changed via the threshing cylinder speed changer 232, the first screw conveyor 237, the second screw conveyor 238, the oscillating sorting device 241, and the rotating blade 208b are all driven at a fixed rotational speed.

[0245] The belt conveyor 245 for forward rotation is configured to span one end of the input shaft 232a of the threshing drum speed changer 232 and the drive shaft 210a of the conveying section 210. The belt conveyor 246 for reverse rotation is configured to span the other end of the reverse output shaft 234b of the threshing drum drive section 234 and the drive shaft 210a. The reverse output shaft 234b is linked to the input shaft 234a via a bevel gear mechanism 234c and is driven in a rotational direction opposite to that of the input shaft 234a.

[0246] The belt conveyor 245, which transmits power in a forward rotation, is switched to the tension side to the transmission connected state, and the belt conveyor 246, which transmits power in a reverse rotation, is switched to the slack side to the transmission disconnected state. Thus, the power from the input shaft 232a is transmitted to the drive shaft 210a via the belt conveyor 245, driving the conveyor section 210 in the conveying direction. At this time, regardless of whether the threshing cylinder 206a is speed-changed via the threshing cylinder speed changer 232, the conveyor section 210 is driven at a fixed rotational speed. The belt conveyor 245, which transmits power in a forward rotation, is switched to the slack side to the transmission disconnected state, and the belt conveyor 246, which transmits power in a reverse rotation, is switched to the tension side to the transmission connected state. Thus, the power from the output shaft 232b is transmitted to the drive shaft 210a via the bevel gear mechanism 234c, the reverse output shaft 234b, and the belt conveyor 246, driving the conveyor section 210 in the rotational direction opposite to the conveying rotational direction.

[0247] The power of the drive shaft 210a of the conveying unit 210 is transmitted via the chain transmission mechanism 247 to the input shaft 211a of the harvesting unit 211, which is located behind the harvesting unit 211. Figure 26 The 248 shown is the compressor for the refrigerant used in the driver's side air conditioning system.

[0248] like Figure 27 , 28 As shown in Figure 29, the threshing drum speed change device 232 is positioned in front of the threshing device 206 and below the conveying section 210, at a position higher than the machine frame 201a. The threshing drum speed change device 232 is located in front of the blower 231 in the threshing device 206. A platform component 249 is sandwiched between the threshing drum speed change device 232 and the machine frame 201a, with the threshing drum speed change device 232 positioned higher than the machine frame 201a.

[0249] The threshing drum transmission device 232 is disposed on the left lateral side of the traveling body 201, on the lateral side opposite to the side where the engine 225 is located. In this embodiment, the threshing drum transmission device 232 is disposed on the left lateral side, but if the engine 225 is disposed on the left lateral side, it is preferable to dispose of the threshing drum transmission device 232 on the right lateral side. The transmission operation part 232c of the threshing drum transmission device 232 protrudes forward from the front of the threshing drum transmission device 232. In this embodiment, the transmission operation part 232c is configured to be able to swing up and down, but it may also be a transmission operation part that can swing left and right or a transmission operation part that can slide in the up and down or left and right directions.

[0250] like Figure 24 As shown, the outer cover 219 covering the threshing device 206 from the lateral outside of the vehicle body is composed of five segmented covers 250. Each segmented cover 250 is detachably supported by a support (not shown) provided on the lateral side wall of the threshing device 206, and can be switched between an open state with the threshing device 206 open and a closed state with the threshing device 206 covered by disassembly and assembly. Figure 27 , 28 As shown in Figures 2 and 29, the front end of the segmented outer cover 250a, which constitutes the lower front part of the outer cover 219 among the five segmented outer covers 250, has a front transverse cover portion 251 that extends laterally toward the inner side of the vehicle body.

[0251] like Figure 29 As shown by solid lines, when the dividing cover 250a is closed, the threshing drum transmission device 232 is covered by the dividing cover 250a from the lateral outside of the traveling body, and the transmission operation unit 232c is covered from the front by the front lateral cover 251. The dividing cover 250a and the front lateral cover 251 can protect the threshing drum transmission device 232 and the transmission operation unit 232c.

[0252] When the speed of the threshing cylinder 206a is changed, such as Figure 29 As shown by the double-dotted line, by opening the dividing cover 250a, the covering of the threshing drum transmission device 232 by the dividing cover 250a is removed, and the covering of the transmission operation part 232c by the front transverse cover 251 is removed. The threshing drum transmission device 232 and the transmission operation part 232c are opened towards the transverse outside and towards the front of the traveling machine body. Furthermore, the conveying part 210 is located above the threshing drum transmission device 232, the threshing device 206 is located behind the threshing drum transmission device 232, and the machine frame 201a is located below the threshing drum transmission device 232. The conveying part 210, the threshing device 206, and the machine frame 201a do not easily obstruct the transmission operation, and the transmission operation of the threshing drum transmission device 232 can be easily performed from the transverse outside of the traveling machine body.

[0253] like Figure 27 , 29 As shown, the threshing drum speed changer 232 is configured such that the input shaft 232a is located above the output shaft 232b. The input pulley 252, which is supported by the input shaft 232a and receives power from the blower 231 without relative rotation, is also supported by the output shaft 232b without relative rotation, and has an outer diameter larger than that of the output pulley 253 that outputs power to the threshing drum drive unit 234. The conveying unit 210 is configured such that the drive shaft 210a is located above the threshing drum speed changer 232. The threshing drum drive unit 234 is supported at the front of the threshing device 206 in a configuration located above the threshing drum speed changer 232. Figure 27 , 28 As shown in Figure 29, the belt conveyor 233 for the threshing drum, which is part of the transmission system connecting the output shaft 232b and the threshing drum drive unit 234, is positioned laterally outside the traveling body compared to the belt conveyor 245 for the conveyor section of the transmission system connecting the input shaft 232a and the drive shaft 210a. Belt replacement of the belt conveyor 233 is easier to perform from the lateral outside the traveling body compared to belt replacement of the belt conveyor 245.

[0254] (Air volume adjustment of fan 231)

[0255] like Figure 30 As shown, opening adjustment members 255 are provided on the outer sides of the air intakes 231b on both sides of the blower 231. The left and right opening adjustment members 255 are connected to the arm portions 256a on both ends of the linkage rod 256, and the left and right opening adjustment members 255 are linked together through the linkage rod 256. The fulcrum shaft portion 256b of the linkage rod 256, which extends in the lateral width direction of the threshing device 206, is supported by the bracket 257, which can rotate relative to each other. The bracket 257 is supported by the front part of the threshing device 206. The left and right opening adjustment members 255 are supported by the bracket 257, which is supported by the linkage rod 256, and the support pin 258, which is inserted into the elongated hole 255a of the opening adjustment member 255, and can swing with the shaft core P of the fulcrum shaft portion 256b as the swing fulcrum and guided by the elongated hole 255a. The operating arm 259, extending from the fulcrum shaft 256b of the linkage 256, is linked to the motor 260 via the linkage mechanism 261. When the motor 260 is driven, the operating arm 259 is swung by the operation of the motor 260 via the linkage mechanism 261.

[0256] When the operating arm 259 is swung, the left and right arm portions 256a are swung around the pivot P, and the left and right opening adjustment members 255 are swung through the arm portions 256a. When the opening adjustment members 255 are swung, the area of ​​the portion of the air intake 231b that is closed by the opening adjustment members 255 changes, and the opening of the air intake 231b changes.

[0257] The opening of the left and right air intakes 231b is adjusted by the swinging operation of the left and right opening adjustment member 255, which is achieved by the motor 260, thereby adjusting the air intake of the fan 231 and the air volume of the sorting air supplied by the fan 231.

[0258] (Other embodiments of embodiment 3)

[0259] (1) In the above embodiment, an example is shown in which the threshing drum transmission device 232 is covered by the divided outer cover 250b from the lateral outside of the traveling body, but the structure in which the threshing drum transmission device 232 is not covered by the cover and remains open can also be adopted.

[0260] (2) In the above embodiment, an example with a front transverse cover 251 is shown, but it may also be implemented without the front transverse cover 251.

[0261] (3) In the above embodiment, a structure is shown that the power is transmitted from the input shaft 232a of the threshing drum speed change device 232 to the conveying section 210, but a structure that transmits power to the conveying section 210 without passing through the threshing drum speed change device 232 may also be adopted.

[0262] (4) In the above embodiment, the structure of the power from the engine 225 being transmitted to the threshing drum speed change device 232 via the fan 231 as an intermediate shaft unit is shown, but it can also be implemented by setting a dedicated intermediate shaft.

[0263] (5) In the above embodiment, an example is shown in which the input shaft 232a is located above the output shaft 232b in the threshing drum speed change device 232, but a structure in which the input shaft 232a is located below the output shaft 232b or a structure in which the input shaft 232a and the output shaft 232b are arranged in the front-back direction can also be adopted.

[0264] (6) In the above embodiment, an example is shown in which the transmission system from the output shaft 232b to the threshing drum drive unit 234 is located further to the lateral outside of the traveling body than the transmission system from the input shaft 232a to the conveying unit 210, but the opposite configuration structure may also be adopted.

[0265] (7) It should be noted that the structures disclosed in the above embodiments can be combined with the structures disclosed in other embodiments as long as they do not contradict each other. Regarding other structures, the embodiments disclosed in this specification are merely exemplary in all respects. Therefore, various changes can be made appropriately without departing from the spirit of this disclosure.

[0266] Industrial availability

[0267] In addition to being applicable to harvesters that harvest rice, wheat, and soybeans, this invention can also be applied to various harvesters that harvest corn and other crops.

[0268] Explanation of reference numerals in the attached figures

[0269] 100 combine harvesters

[0270] 2 Threshing device

[0271] 4 Grain bins

[0272] 4F Outer surface of the outer sidewall

[0273] 4L lower side box

[0274] 4S Bottom Stirring Cage

[0275] 4U upper box part

[0276] 4W sidewall

[0277] 4Wf Anterior sidewall

[0278] 4Wi inner wall

[0279] 4Wo lateral wall;

[0280] 4Wr high speed wall

[0281] 5. Locking mechanism

[0282] 6 Support mechanism

[0283] 7. Door stop mechanism

[0284] 8. Lower side cover

[0285] 9. Connecting Mechanism

[0286] 35 Discharge section

[0287] 41 Inspection Port

[0288] 42. Inspection port edge

[0289] 43 doors

[0290] 43A Face

[0291] 43B Bend

[0292] 43C Contact Section

[0293] 43D recess

[0294] 44 handles

[0295] 45. Monitoring Window

[0296] 45A Small Door

[0297] 46. ​​Ribs

[0298] 46A Longitudinal Rib

[0299] 46B Transverse Rib

[0300] 61 Support rod

[0301] 62 Supporting components for support

[0302] 62A Support Rod Guide

[0303] 99 Sealing components

[0304] 101 Motor Body

[0305] 106 Threshing device

[0306] 107 Storage Section (Threshing Box)

[0307] 111 Harvesting Department

[0308] 116a Longitudinal discharge device

[0309] 120 Threshing machine body

[0310] 131 selection box

[0311] 135 Glue sieve (first glume sieve)

[0312] 145 Opening Adjustment Section

[0313] 149 Operation cable

[0314] 150 Inspection Port

[0315] 151 pillars

[0316] 160 Remote Operation Device

[0317] 201 Motor Body

[0318] 201a Airframe

[0319] 206 Threshing device

[0320] 210 Conveying Department

[0321] 210a drive shaft

[0322] 211 Harvesting Department

[0323] 231 Fan

[0324] 232 Threshing drum speed change device

[0325] 232a Input Shaft

[0326] 232b output shaft

[0327] 232c transmission control unit

[0328] 234 Threshing cylinder drive unit

[0329] 250a Outer Cover (Segmented Outer Cover)

[0330] 251 Front transverse cover.

Claims

1. A harvester, comprising: The machine includes a harvesting section located at the front of the traveling body for harvesting crops from the field; a threshing device located on the traveling body for threshing the crops harvested by the harvesting section; a conveying section extending from the traveling body towards the harvesting section for supplying the harvested crops to the threshing device; and a threshing drum transmission device that transmits power from the engine, changes the transmission speed, and outputs the transmitted power to the threshing drum drive unit of the threshing device. The threshing drum speed change device is located in front of the threshing device and below the conveying section, at a position higher than the body frame of the traveling machine.

2. The harvester according to claim 1, wherein, It has an outer cover that extends laterally from the outside of the traveling machine body to cover the threshing device. The threshing drum transmission device is covered by the outer cover from the lateral outside of the traveling body.

3. The harvester according to claim 2, wherein, The front end of the threshing drum speed change device has a speed change operation part that protrudes forward. The outer cover is configured to change state between a closed state covering the threshing device and the threshing drum speed change device and an open state that allows the threshing device and the threshing drum speed change device to be open. The outer cover has a front transverse cover portion at its front end, which protrudes laterally toward the inner side of the machine body. When the outer cover is in the closed state, the front transverse cover portion covers the gear shifting operation portion from the front. When the outer cover is in the open state, the front transverse cover portion opens the gear shifting operation portion.

4. The harvester according to claim 1, wherein, Power is transmitted from the input axis of the threshing drum speed change device to the drive shaft of the conveying section.

5. The harvester according to claim 1, wherein, The speed change device for the threshing cylinder is located in front of the fan in the threshing device. The engine is located on the side opposite to the side where the threshing drum transmission device is located on the two lateral sides of the traveling body. The power of the engine is transmitted to the input shaft of the threshing drum speed changer via the fan.

6. The harvester according to claim 4 or 5, wherein, In the threshing drum speed change device, the input shaft is located above the output shaft.

7. The harvester according to claim 6, wherein, The drive shaft of the conveying unit and the drive unit of the threshing cylinder are located above the speed change device of the threshing cylinder. The power from the output shaft is transmitted to the threshing cylinder drive unit, and the power from the input shaft is transmitted to the drive shaft. The transmission system connecting the output shaft and the threshing drum drive unit is located laterally to the outside of the traveling body compared to the transmission system connecting the input shaft and the drive shaft.

8. A harvester, comprising: A threshing device for threshing harvested crops; and A grain bin, arranged horizontally to the threshing device, stores the grains threshed by the threshing device. The outer side wall of the grain bin, located on the opposite side of the threshing device in the left-right direction, includes: an inspection port, which opens in the front-back direction of the outer side wall; and a door for opening and closing the inspection port.

9. The harvester according to claim 8, wherein, The grain bin is equipped with a discharge section for discharging the grains from the threshing device. The inspection port is positioned so as not to overlap with the discharge section when viewed from the side.

10. The harvester according to claim 9, wherein, The discharge section is located in the front area inside the grain bin. The inspection port is located in the rear region of the outer side wall.

11. The harvester according to any one of claims 8 to 10, wherein, The door has an abutting portion that abuts against the edge of the inspection port. When the door is closed, the abutting portion abuts against the edge portion via a sealing member.

12. The harvester according to claim 11, wherein, The door is formed to be larger than the inspection port. The contact portion abuts against the edge portion from the inside of the grain bin.

13. The harvester according to any one of claims 8 to 10, wherein, The door is positioned on the same plane relative to the outer surface of the outer wall.

14. The harvester according to any one of claims 8 to 10, wherein, The door has a recessed portion that faces inward toward the grain bin. A handle for opening and closing the door is provided in the recess.

15. The harvester according to claim 14, wherein, The recess is formed into an inwardly narrow shape that narrows towards the inside.

16. The harvester according to any one of claims 8 to 10, wherein, The inspection port is formed in a longitudinal shape along the vertical direction.

17. The harvester according to any one of claims 8 to 10, wherein, The grain bin includes: a lower side section, which is narrow at the bottom and has a bottom stirring cage for discharging stored grains from the grain bin; and an upper side section, which is located above the lower side section. The inspection port is formed extending from the upper part of the portion constituting the outer side wall of the upper box section to the lower part.

18. A harvester, comprising: A threshing device for threshing harvested crops; and A grain bin, arranged horizontally to the threshing device, stores the grains threshed by the threshing device. It also includes: an inspection port, which opens into the side wall of the grain bin; and a door, configured to open inward, which abuts against the edge of the inspection port from the inside of the grain bin to close the inspection port.

19. The harvester according to claim 18, wherein, The door has an abutting portion that abuts against the edge portion. When the door is closed, the abutting portion abuts against the edge portion via a sealing member.

20. The harvester according to claim 19, wherein, The abutting portion is disposed around the entire periphery of the door and abuts against the entire edge portion.

21. The harvester according to claim 19 or 20, wherein, The door has a curved portion that bends inward toward the grain bin. The abutting portion is configured to be continuously formed with the curved portion and opposite the edge portion. The door is positioned on the same plane relative to the outer surface of the sidewall.

22. The harvester according to any one of claims 18 to 20, wherein, The door has a recessed portion that faces inward toward the grain bin. A handle for opening and closing the door is provided in the recess.

23. The harvester according to any one of claims 18 to 20, wherein, The grain bin is equipped with a locking mechanism inside to lock the door when it is closed. The handle for opening and closing the door and the locking mechanism are configured to work together.

24. The harvester according to any one of claims 18 to 20, wherein, The grain bin has a support mechanism inside that supports the door when it is closed.

25. The harvester according to any one of claims 18 to 20, wherein, Multiple ribs are formed on the inner side of the grain bin in the door.

26. The harvester according to claim 25, wherein, The plurality of ribs are configured to have a plurality of longitudinal ribs formed in the vertical direction and a plurality of transverse ribs formed in the horizontal direction.

27. The harvester according to claim 26, wherein, The door has a recessed portion that faces inward toward the grain bin. The plurality of longitudinal ribs are positioned to sandwich the recess. The multiple transverse ribs are respectively disposed on the upper and lower edges of the door.

28. A harvester, arranged in a configuration along the lateral width of a traveling body, the traveling body comprising: a threshing unit for receiving crop harvested by a harvesting section, threshing the supplied crop, and sorting the threshed material; and a storage unit for receiving and storing the threshed material discharged from the threshing unit. The threshing device includes: a threshing body; a sorting frame swayably disposed inside the threshing body; a chaff screen supported by the sorting frame and with an adjustable opening; and an inspection port opening at the rear of the threshing body for removing / placing the sorting frame. A remote operation device is provided behind the storage section. The remote operation device is linked to the opening adjustment section of the chaff screen via an operation cable, and the opening adjustment section is operated remotely by electric power.

29. The harvester according to claim 28, wherein, The storage section is a threshing chamber. The threshing box includes a longitudinal discharge device, which is disposed at the rear of the threshing box in a state extending in the vertical direction of the traveling body, and discharges the threshing material from the threshing box; And a support column, erected on the traveling body, supports the longitudinal discharge device. The remote operation device is supported by the support column.

30. The harvester according to claim 29, wherein, The remote operating device is supported by the support column in a position located behind the support column.

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