JP7446218B2 - sugarcane harvester - Google Patents

Description

The present invention relates to a sugarcane harvester.

For example, the sugarcane harvester disclosed in Patent Document 1 is equipped with a conveyor (referred to as a "discharge conveyor" in the literature) that receives the harvested material from a separation device (referred to as a "wind sorting device" in the literature) and conveys it diagonally upward. The conveyor is configured to be able to swing left and right by the telescopic drive of a hydraulic cylinder.

Japanese Patent Application Publication No. 2018-078837

In order to drive the hydraulic cylinder to expand and contract, a hydraulic pipe is provided between the hydraulic source and the hydraulic cylinder, and hydraulic fluid from the hydraulic source is supplied to and discharged from the hydraulic cylinder via the hydraulic pipe. By the way, when the conveyor swings from side to side, hydraulic piping connected to the hydraulic cylinder is displaced to follow the swing of the conveyor. Generally, there may be other equipment between the hydraulic power source and the hydraulic cylinder, so displacement of the hydraulic piping may cause the hydraulic piping to come into contact with or interfere with other equipment. is not desirable. In order to avoid such inconveniences, it is desirable to have a configuration in which the hydraulic piping is held in a predetermined position. However, if the hydraulic piping is held in a predetermined position, the displacement of the hydraulic piping is limited, and as the conveyor swings, There is a risk of excessive deformation of the hydraulic piping.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sugarcane harvester that can hold the hydraulic piping in a predetermined position and make the hydraulic piping follow the swinging motion of a conveyor so that the hydraulic piping is not unduly deformed. It is in.

The sugarcane harvesting machine of the present invention includes a traveling body having a reaping and conveying device for reaping crops in a field and transporting the crops rearward, and a traveling body provided at the rear of the traveling body for separating the crops into foreign matter and harvested material. a separation device; the device is connected to the rear part of the traveling body in a state in which it can pivot around a vertically directed first axis using its lower end as a fulcrum, receives the harvested material from the separation device and directs it diagonally upward; a conveyor for transporting and discharging the machine to the outside; and a plurality of conveyors connected to the rear part of the traveling body and the conveyor in a state in which they are distributed to the left and right with respect to the first axis, and that drive the conveyor to turn left and right. a hydraulic cylinder, and a hydraulic pipe connected to a hydraulic power source and capable of supplying and discharging hydraulic oil to each of the plurality of hydraulic cylinders, the hydraulic pipe including one main pipe and a branch part. the main piping is connected to the hydraulic pressure source, and the branching section connects the main piping to each of the plurality of hydraulic cylinders on a front side of the aircraft body with respect to the first axis of the hydraulic piping. It is characterized in that the conveyor is branched into a plurality of parts, and the branch part is configured to be swingable about a second vertical axis following the rotation of the conveyor.

According to the present invention, even when the plurality of hydraulic cylinders follow the swinging of the conveyor and swing left and right, the branching part is configured to be able to swing around the second axis, so that the branching part It can swing in response to the swings of multiple hydraulic cylinders. In other words, the branch portion absorbs the load applied to the hydraulic piping according to the swinging postures of the plurality of hydraulic cylinders. This makes it difficult for the hydraulic piping to be unreasonably deformed, and improves the durability of the hydraulic piping. Moreover, since the branch part is configured to be swingable around the second axis, the hydraulic piping can be displaced while being held in the area where the second axis exists. Therefore, compared to a configuration in which the branch portion does not swing around the second axis, the hydraulic piping does not move to an unintended location, and for example, contact or interference with other equipment is avoided. As a result, a sugarcane harvester is realized that can hold the hydraulic piping in a predetermined position and cause the hydraulic piping to follow the swinging motion of the conveyor so that the hydraulic piping is not unduly deformed.

In the present invention, a plurality of the hydraulic pipes and a plurality of the branch parts corresponding to the plurality of hydraulic pipes are provided, and the plurality of branch parts are arranged vertically and one of the second shafts. Preferably, it is configured to be able to swing around the core.

When the conveyor swings around the first vertical axis, the plurality of hydraulic cylinders swing left and right. With this configuration, the branch parts are aligned vertically and swing around the second axis, so compared to a configuration in which the branch parts are not arranged vertically, the hydraulic piping between the branch part and the hydraulic cylinder is The deformation range and deformed posture remain within the predictable range. Therefore, unexpected local loads are less likely to be applied to the hydraulic piping, and the durability of the hydraulic piping is improved.

In the present invention, the plurality of hydraulic cylinders are configured to be double-acting, and the plurality of hydraulic pipes include an extension pipe for supplying and discharging the hydraulic oil to and from an extension oil chamber in the plurality of hydraulic cylinders; and a contraction pipe for supplying and discharging the hydraulic oil to and from the contraction oil chambers in the hydraulic cylinders, and as the plurality of branch parts, the extension piping corresponds to the expansion oil chambers in the plurality of hydraulic cylinders. It is preferable that an extension branch part that branches off at the same time as the contraction pipe branch, and a contraction branch part that branches the contraction pipe corresponding to the contraction oil chambers of the plurality of hydraulic cylinders are provided.

With this configuration, each of the branch parts in each of the extension pipe and the contraction pipe swings independently, making it difficult for the extension pipe and the contraction pipe to undergo unreasonable deformation. This improves the durability of the entire hydraulic piping.

In the present invention, it is preferable that the second axis is set at a location in front of the plurality of hydraulic cylinders.

With this configuration, even if multiple hydraulic cylinders follow the swinging of the conveyor and swing left and right, the second axis can be separated from the plurality of hydraulic cylinders as much as possible, so the hydraulic piping can be Deformation becomes smaller.

In the present invention, it is preferable that the second axis is set at a position on the extension of the main piping at the branch portion in plan view.

With this configuration, since the main piping deforms only in the left and right direction, the main piping follows the swinging of the branch part with better sensitivity compared to a configuration in which the second axis is not set at a position on the extension of the main piping. However, the amount of deformation of this piping can be reduced.

In the present invention, the hydraulic power source includes a storage tank that stores the hydraulic oil, and a pump unit that pumps the hydraulic oil from the storage tank to each of the plurality of hydraulic cylinders via the hydraulic piping. , the pump unit is provided so as to be biased to one side of the left and right sides of the traveling body with respect to the center in the left and right direction of the body of the traveling body, and the main piping and the branch portion are provided on one side of the right and left of the body with respect to the center of the body in the left and right direction of the traveling body. Preferably, it is provided so as to be biased to the side.

With this configuration, the storage tank and pump unit are installed offset to one side of the left and right sides of the machine, so compared to a configuration in which the storage tank and pump unit are installed at the center of the left and right sides of the machine, the operator can And the pump unit can be easily maintained. In addition, because the main piping and the branch section are installed offset to the same side as the storage tank and pump unit, the length of the hydraulic piping that spans the drive source and multiple hydraulic cylinders is shortened, and the hydraulic piping Pressure loss is reduced.

In the present invention, another hydraulic piping is provided for supplying and discharging the hydraulic oil from the hydraulic source to a portion of the conveyor on the rear side of the hydraulic cylinder, and includes a separate hydraulic pipe that supplies and discharges the hydraulic oil from the hydraulic source to a portion of the conveyor on the rear side of the hydraulic cylinder, and includes a rear part of the traveling machine body and the conveyor. It is preferable that a guide part is provided at the connection point with the conveyor to prevent the other hydraulic pipe from falling into the gap between the rear part of the traveling machine body and the front part of the conveyor.

In the area where the rear of the traveling machine is connected to the conveyor, a space is secured to allow the conveyor to turn, so it is easy for another hydraulic pipe to fall into the gap between the rear of the traveling machine and the conveyor, and this gap Otherwise, there is a risk that other hydraulic piping may be unreasonably deformed. With this configuration, the other hydraulic piping is firmly supported by the guide portion, so the possibility that the other hydraulic piping is unreasonably deformed is reduced.

FIG. 1 is an overall side view of a sugarcane harvester. FIG. 1 is an overall plan view of a sugarcane harvesting machine. It is a side view which shows the conveyance start end part of a separation apparatus and a conveyor. FIG. 2 is a plan sectional view showing the configuration of a separation device. FIG. 2 is a longitudinal cross-sectional view showing the separation device and the conveyance starting end of the conveyor. FIG. 3 is a plan view showing the transport start end of the hopper and the conveyor. FIG. 2 is a plan view showing the arrangement of an engine, a travel transmission section, and hydraulic piping. FIG. 3 is a side view showing the expansion and contraction operation of the lifting hydraulic cylinder of the conveyor. FIG. 3 is a side view showing the support structure of the front end of the conveyor. FIG. 3 is a bottom view of the conveyor showing the support structure of the lifting hydraulic cylinder. 10 is a cross-sectional plan view taken along the line XI-XI in FIG. 9 showing the swing hydraulic cylinder and the branching portion. FIG. FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11 showing the swing hydraulic cylinder and the branching portion. It is a top view which shows a turning hydraulic cylinder and a branch part. It is a top view which shows a turning hydraulic cylinder and a branch part. FIG. 3 is a plan sectional view showing an interlocking mechanism between the conveyor and the hood part. FIG. 3 is a front view showing a separation device with a cord wrapped around it. FIG. 3 is a side view of main parts showing an interlocking mechanism between the conveyor and the hood part. FIG. 3 is a plan sectional view of a main part showing an interlocking mechanism between the conveyor and the hood part. FIG. 3 is a plan view showing the turning range of the conveyor and the hood part. FIG. 2 is a vertical cross-sectional view showing an endless rotating chain and a conveyor of a conveyor. FIG. 2 is a cross-sectional view of the endless rotating chain of the conveyor and the conveyor as seen in the conveyance direction. FIG. 3 is a vertical cross-sectional view showing the carrier. It is a top view showing the whole upper cover part of a conveyor. FIG. 3 is a vertical cross-sectional view showing the conveyance start end of the conveyor. 25 is a sectional view taken along the line XXV-XXV in FIG. 24 showing the conveyance start end of the conveyor. FIG. 25 is a sectional view taken along the line XXVI-XXVI in FIG. 24 showing the conveyance start end of the conveyor. FIG. It is a bottom view showing the structure of the turning fulcrum of the conveyor. FIG. 28 is a sectional view taken along line XXVIII-XXVIII in FIG. 27 showing the structure of the turning fulcrum of the conveyor.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a sugarcane harvester according to the present invention will be described based on the drawings.

〔overall structure〕
1 and 2 are diagrams showing the entire sugarcane harvesting machine, with FIG. 1 being a left side view and FIG. 2 being a plan view. In this embodiment, the direction indicated by symbol (F) in FIGS. 1 and 2 is the front side of the fuselage, and the direction indicated by symbol (B) is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the aircraft.

The sugarcane harvester includes front wheels 1 as left and right front running devices that can be steered, and rear wheels 2 that cannot be steered and are rotationally driven left and right rear running devices. The sugarcane harvester can run by driving rear wheels 2.

The traveling body is equipped with a driving section 3, a reaping section 4, a topper 5, a conveying device 6, a separating device 7, a conveyor 8, an engine 9, and the like. The reaping section 4 reaps crops (sugarcane) planted in the field. The topper 5 cuts the upper leaf part of the crop. The conveying device 6 conveys the crops cut by the reaping section 4 rearward and upward. The separation device 7 is provided at the rear of the traveling machine and separates the crops transported by the transport device 6 into foreign matter and harvested products (sugarcane). The reaping section 4 and the transport device 6 correspond to the "reaping transport device" of the present invention. The conveyor 8 extends diagonally upward from a location below the separation device 7. The conveyor 8 is connected to the rear part of the traveling machine in a state in which it can rotate about the vertical axis X1 with its lower end as a fulcrum, and receives the harvested material from the separation device 7, conveys it diagonally upward, and carries it out of the machine. discharge to. The vertical axis X1 is the rotation axis of the conveyor 8. The engine 9 supplies power to each part of the aircraft. The vertical axis X1 corresponds to the "first axis" of the present invention.

The conveyor 8 is provided with an inclined part 8A, a connecting part 8C, and a bent part 8B. The inclined part 8A is inclined diagonally upward, and the connecting part 8C is connected to the inclined part 8A on the lower side in the conveyance direction via the bent part 8B, and is lowered than the inclined part 8A.

The driving section 3 is provided at a high position at the front of the traveling aircraft, and is surrounded by a cabin 10. Inside the cabin 10, a driver's seat, a steering wheel, an operation panel, etc. are provided. A door that can be opened and closed is provided on each of the left and right sides of the cabin 10.

The reaping section 4 is provided at the front lower part of the traveling machine body. The reaping section 4 is equipped with left and right weeding devices 11 and a reaping header 12. The left and right weeding devices 11 separate and guide the crops to be harvested among the planted crops. The reaping header 12 reaps the crops to be planted in the field and sends them rearward. The left and right weeding devices 11 are provided with a rotary weeding body 13 that is rotationally driven and has a vertical orientation.

The reaping header 12 is provided so as to be connected to the rear of the left and right weeding devices 11. A roller is provided in an area sandwiched between the left and right side walls of the reaping header 12, and the roller scrapes the crop backward while pushing it down so that it falls forward. Further, the reaping header 12 is equipped with a cutting device 18 for cutting the base of the crop. The cutting device 18 is located behind the left and right weeding devices 11. The cutting device 18 is equipped with a pair of left and right rotary cutters, and the rotary cutters rotate around the upper and lower axes to cut the base of the crop.

The conveyance start end of the conveyance device 6 is connected to the rear of the cutting device 18 . The conveying device 6 is provided in an upwardly inclined position so as to convey the crops toward the rear and upper side of the machine body. The transport device 6 is made of a highly rigid structure. A substantially rectangular cylindrical conveyance path is formed by the structure. Scraping rotors are provided on both upper and lower sides of the transport path in the transport device 6. The scraping rotors are provided at appropriate intervals in the conveyance direction. The scraping rotors on both the upper and lower sides are driven to rotate in opposite directions. The long crop cut by the cutting section 4 is conveyed rearward while being sandwiched between the scraping rotors on both the upper and lower sides.

The conveyance device 6 is equipped with a pair of upper and lower cutting rollers 42, 42 (see FIG. 5) at the conveyance terminal end, and the cutting rollers 42, 42 are equipped with cutting blades extending radially outward. The long crop is cut into a predetermined length by being pinched by the cutting blades of the cutting rollers 42, 42 at the end of the conveyance. The "predetermined length" is, for example, a length that is easy to handle in subsequent transportation steps and processing steps. The separating device 7 separates foreign substances such as fine stem culm waste and leaf fragments contained in the crops discharged from the conveying end portion of the conveying device 6 by the ventilation effect of a fan 72 rotating around the vertical axis X1. and discharge outward.

A hopper 19 is provided directly below the separating device 7 and below the rear end of the conveying device 6 to receive the crops discharged downward from the conveying device 6. The crops received by the hopper 19 are guided to the conveyance start end of the conveyor 8. The conveyor 8 is supported by a conveyor support frame body 20 provided at the rear of the traveling machine, and extends upward and outward from the rear of the traveling machine. The conveyor 8 transports the crops in a locked manner and discharges them to the outside from the end of the transport.

[About the separation device]
As shown in FIGS. 3 to 5, the separation device 7 includes a case portion 70, a hood portion 71, and a fan 72. The fan 72 is configured to be rotatable around the vertical axis X1 by the power of the hydraulic motor 72M. A lower end portion of the case portion 70 is opened downward. The open portion at the lower end of the case portion 70 is referred to as an intake portion 70h. The fan 72 is provided sandwiched between the hood part 71 and the case part 70. The case portion 70 separates the harvested crops into foreign matter and the harvested matter, guides the foreign matter upward, and guides the harvested matter downward. The hood portion 71 discharges foreign matter to the side.

As shown in FIG. 4, the case portion 70 is formed in a cylindrical shape in plan view, and the inner surface shape of the case portion 70 has a circular cross-sectional shape centered on the vertical axis X1. A connection port connected to the transport end portion of the transport device 6 is formed in the front portion of the outer circumference of the case portion 70 . This connection port is an input port 70i that receives crops transported from the transport device 6. That is, an input port 70i is formed in the outer circumference of the case portion 70, into which the crops transported by the transport device 6 are input. After the stem culm of the crop is cut by the cutting rollers 42, 42 (see FIG. 5) at the end of the conveyance, the stem culm of the crop is discharged from the input port 70i of the case part 70 into the inside of the case part 70 at an angle of about 45 degrees. It will be put in. The cutting rollers 42, 42 are feeding devices for throwing crops into the case portion 70.

The fan 72 is provided inside the case part 70 and rotates around the vertical axis X1 passing through the center of the circle to generate a sorting air. The vertical axis X1 is the central axis of the fan 72. The bottom of the case part 70 is provided with an intake part 70h through which a fan 72 generates a sorting air. The sorting wind rises while swirling upward. The crops put into the case part 70 are subjected to a suction action by the fan 72, and relatively light foreign substances such as fine stem culm debris and leaf fragments are sucked upward. The contaminants then pass through the fan 72 and are discharged outward from the hood section 71. In addition, the hood part 71 is provided above the case part 70 so as to be rotatable around the vertical axis X1, so that the direction of discharge of foreign matter can be changed. The vertical axis X1 is the rotation axis of the hood portion 71. Harvested products that are heavier than foreign matter are not sucked by the fan 72 and fall downward as they are.

The case portion 70 extends below the connection portion between the transport device 6 and the separation device 7, that is, the input port 70i. A scattering prevention chain 70C is connected to the lower end of the case portion 70, and the scattering prevention chain 70C hangs down to near the upper end of the hopper 19. The anti-scattering chain 70C is connected to the periphery of the rear half of the cylindrical case portion 70. Thereby, the risk of the harvested material thrown into the case part 70 from the conveyance device 6 falling outside the hopper 19 is reduced.

As shown in FIG. 4, two openings 73, 73 are provided on the outer periphery of the case portion 70, and the openings 73, 73 are provided on the left and right sides with the vertical axis X1 in between. In other words, the two openings 73, 73 are formed in the circumferential direction of the case portion 70 so as to be distributed to the left and right with the input opening 70i for crops transported by the transport device 6 interposed therebetween. As the fan 72 is rotated, air inside the case portion 70 is sucked by the fan 72 . At this time, outside air is sucked in from the openings 73, 73, in addition to the air intake portion 70h, which is the open portion at the lower end of the case portion 70. The openings 73, 73 are formed in a portion of the outer peripheral portion of the case portion 70 between the fan 72 and the air intake portion 70h in the extending direction of the vertical axis X1. Further, the openings 73, 73 are on the same side of the outer circumference of the case part 70 as the side where the crop input opening 70i is formed with respect to the vertical axis X1 when viewed in the direction along the extending direction of the vertical axis X1. It is formed on the side.

A plate member 53 is provided above the cutting rollers 42 and 42 and over the input port 70i on the outer periphery of the case portion 70. The rear end of the plate member 53 is the upper end of the input port 70i of the case part 70, and the crop discharged by the cutting rollers 42, 42 is guided into the case part 70 along the plate member 53. The rear end of the plate member 53 is located at approximately the same height as the upper ends of the openings 73, 73. For this reason, the openings 73, 73 are formed at positions in the outer peripheral portion of the case portion 70 in the direction along the vertical axis X1 within a range corresponding to the range where the input port 70i exists.

The case part 70 is provided with an air passage part 73A, which extends from the cylindrical outer peripheral part of the case part 70 in a tangential direction to the vertical axis X1, and extends from the extending end of the air passage part 73A. A suction port is formed. The air passage portion 73A extends from the downstream end of the openings 73, 73 in the swirling direction of the sorting air in the outer peripheral portion of the case portion 70 toward the upper side in the outside air suction direction along the tangential direction at the downstream end. The air passage section 73A has an inlet 73h at an end opposite to the openings 73, 73 for introducing outside air. The air passage section 73A is configured to have a uniform width when viewed in a direction along the vertical axis X1.

A dustproof member 73B is provided at the suction port 73h (extending end portion) of the air passage portion 73A. The dustproof member 73B is constituted by a plurality of round bars extending above and below the air passage section 73A. When the outside air is sucked through the opening 73, the outside air flows between the plurality of round bars, and foreign objects are likely to get caught on the plurality of round bars. This makes it difficult for foreign matter such as dust to be sucked into the case portion 70 from the opening 73.

The outside air from each of the openings 73, 73 is sucked into the case part 70 while being rectified so as to flow along the tangential direction with respect to the outer circumference of the case part 70, and is drawn into the cylindrical inner circumference of the case part 70. Flows along the side walls. In other words, as the fan 72 is driven to rotate, an upward swirling flow tends to occur at the inner peripheral edge of the case part 70. , the swirling flow becomes stronger compared to a configuration in which the openings 73, 73 are not provided. As a result, even if the foreign matter becomes lumpy, the lumpy foreign matter is firmly loosened by the swirling flow and becomes dust-like. Contaminants tend to collect in the inner circumferential area inside the case part 70, and harvested products tend to collect in the outer circumferential area inside the case part 70. As a result, contaminants and harvested materials are firmly separated. In this manner, openings 73, 73 are formed in the outer circumferential portion of the case portion 70 to suck in outside air by swirling the sorting air.

The structure of the fan 72 will be explained based on FIG. 5. The fan 72 includes a fan body 72A, a shaft 72S, a cylindrical shaft case 72K, and a hydraulic motor 72M. The hydraulic motor 72M is located above the hood part 71, and the shaft case 72K extends vertically inside the hood part 71. The hydraulic motor 72M and the shaft case 72K are each connected to the support portion 70S by bolts. A plurality of frames extend from the main body of the case section 70 to the side of the hood section 71 and above the hood section 71. The support portion 70S is supported by the plurality of frames. A through hole through which the shaft case 72K passes is formed in the support portion 70S.

The shaft 72S is inserted into the shaft case 72K. Further, the shaft 72S is supported by the shaft case 72K via ball bearings at the upper and lower ends of the shaft case 72K. Thereby, the shaft 72S is configured to be rotatable inside the shaft case 72K. A spline portion is formed at the upper end of the shaft 72S, and the upper end of the shaft 72S and the output shaft of the hydraulic motor 72M are spline-coupled. Further, a spline portion is formed at the lower portion of the shaft 72S, and the lower portion of the shaft 72S and the rotation center portion of the fan body 72A are spline-coupled. A thread groove is formed at the lower end of the shaft 72S, and by tightening the nut at the lower end of the shaft 72S, the fan main body 72A is supported so as not to come off from the shaft 72S.

A cylindrical portion 72f is formed at the center of rotation of the fan body 72A, and a lower portion of the shaft 72S fits into the cylindrical portion 72f. The flange portion 72D is externally fitted onto the shaft case 72K. The flange portion 72D covers the upper end of the cylindrical portion 72f from above, and also covers the upper end of the cylindrical portion 72f from the outer peripheral side. Since the cylindrical portion 72f is a part of the fan main body 72A, the cylindrical portion 72f rotates relative to the flange portion 72D. The lower end of the flange portion 72D and the upper end of the cylindrical portion 72f approach each other to the extent that they do not contact each other, and the flange portion 72D and the cylindrical portion Portion 72f is configured. This makes it difficult for foreign matter to enter the relative rotation portion between the fan main body 72A and the shaft case 72K.

When an operator performs maintenance on the fan 72, the operator removes a nut at the lower end of the shaft 72S and removes the fan body 72A from the shaft 72S. Then, when the operator releases the bolt connection of the hydraulic motor 72M in the support part 70S, the hydraulic motor 72M is removed from the support part 70S. At this time, the spline connection between the hydraulic motor 72M and the shaft 72S is also released. In addition, when the operator releases the bolt connection of the shaft case 72K in the support part 70S and pulls out the shaft case 72K upward from the through hole of the support part 70S, the shaft case 72K and the shaft 72S are integrally attached to the support part. Removed from 70S.

As shown in FIGS. 3 and 5, the hood portion 71 includes a hood main body 71A and a bottom member 71B, and the hood main body 71A and the bottom member 71B are connected to each other by bolts. When the hood part 71 pivots around the vertical axis X1, the bottom member 71B rotates relative to the case part 70, so the bottom member 71B tends to wear out. In this embodiment, when the bottom member 71B is worn out, the operator can replace the bottom member 71B by releasing the bolt connection between the hood main body 71A and the bottom member 71B. Moreover, when the wear of the hood body 71A progresses due to collision with foreign objects, the operator can replace only the hood body 71A.

[About the hopper]
The hopper 19 will be explained based on FIG. 6. The front end of the conveyor 8 enters the lower region of the separating device 7 . For this reason, an input port is provided at the upper part of the front end of the conveyor 8 to receive the harvested material falling from the separating device 7. The hopper 19 is located between the separating device 7 and the front end of the conveyor 8 and is connected to an input port at the front end of the conveyor 8 . In this embodiment, the hopper 19 is formed in a semicircular shape in plan view. That is, the hopper 19 is raised from the input port in a state surrounding the front, right, and left parts of the input port. The harvested product falling from the separator 7 is received by a hopper 19 and guided as it is to the input port at the front lower part of the conveyor 8.

The input port at the front end of the conveyor 8 extends upward and rearward from the rear end of the hopper 19. In other words, the portion of the conveyance path of the conveyor 8 located on the upper side in the conveyance direction than the front end of the upper cover portion 88A is the input port of the conveyor 8. A pair of left and right side cover parts 19B, 19B are provided at the rear of the hopper 19. The rear end of the hopper 19 and the front ends of the pair of left and right side cover parts 19B, 19B are connected by bolts. The pair of left and right side cover portions 19B, 19B are raised from the left and right sides of a portion of the input port at the front end of the conveyor 8 that extends rearward and upward from the rear end of the hopper 19. For this reason, the hopper 19 and the pair of left and right side cover portions 19B, 19B are integrally configured to catch the harvest falling from the separation device 7. The conveyor 8 rises obliquely upward from the starting end of the conveyance path, and the pair of left and right side cover portions 19B, 19B are inclined rearwardly upward along the slope of the conveyor 8.

Generally, the harvested material is discharged from the transport end of the conveyor 8 onto the loading platform of a transport vehicle, for example, but when the loading platform of the transport vehicle becomes full and the transport vehicle leaves the field, the sugarcane harvesting machine moves to the next stage. A possible case is waiting for the arrival of a transport vehicle. At this time, it is desirable that the sugarcane harvester can harvest the crops in the field while running with the conveyor 8 stopped and accumulating the harvest in the hopper 19. In this embodiment, the input port at the front end of the conveyor 8 extends rearward and upper than the rear end of the hopper 19, so compared to a configuration in which the input port is provided only below the hopper 19, the input port is further extended. It is possible to receive many crops. Further, the rear end of the hopper 19 and the front ends of the left and right pair of side cover parts 19B, 19B are connected, and the hopper 19 and the left and right pair of side cover parts 19B, 19B are integrally configured. has been done. Therefore, compared to a configuration in which the pair of left and right side cover portions 19B, 19B is not provided, it is possible to store more harvested products in the input port at the front end of the conveyor 8.

A plurality of conveyance bodies 86 and a bottom member 87 are provided on the conveyance path. Each of the plurality of conveyors 86 is connected to a pair of left and right endless rotation chains 85, 85. The plurality of conveyance bodies 86 are attached to extend over a pair of left and right endless rotation chains 85, 85, and move obliquely upward from the start end of the conveyance path by rotating together with the endless rotation chains 85, 85. Therefore, the harvested product that has fallen from the separation device 7 is guided to the conveyance starting end by the hopper 19 and the pair of left and right side covers 19B, 19B. The harvested product is then conveyed obliquely upward by a plurality of conveyors 86 while being placed on the bottom member 87 .

[Hydraulic piping support structure]
As shown in FIGS. 3, 6, and 8, a swing-side clamp section 43 is provided at the bottom of the hopper 19, and the swing-side clamp section 43 supports a plurality of conveyor hydraulic pipes 58. The conveyor hydraulic piping 58 corresponds to "another hydraulic piping" of the present invention. As shown in FIG. 7, a transmission section 51 is provided adjacent to the left side of the engine 9, and a plurality of pump units 32 are connected to the left side of the transmission section 51. The transmission section 51 transmits the power of the engine 9 to the plurality of pump units 32. A storage tank 31 for storing hydraulic oil is provided at the lower left side of the front-rear intermediate portion of the fuselage. Each of the plurality of pump units 32 supplies hydraulic oil stored in the storage tank 31 to the hydraulic equipment. The plurality of pump units 32 and storage tanks 31 are provided so as to be biased to the left side of the vehicle with respect to the center in the left-right direction of the traveling vehicle. Note that the storage tank 31 corresponds to the "hydraulic source" of the present invention.

A fixed side clamp part 44 is provided on the left side of the rear part of the traveling machine body, and the fixed side clamp part 44 supports a plurality of conveyor hydraulic pipes 58. The fixed side clamp section 44 is configured to be able to swing left and right. The conveyor hydraulic piping 58 supplies and discharges hydraulic oil from the storage tank 31 and the pump unit 32 to and from a hydraulic motor 81M, lifting hydraulic cylinders 24, 24, etc., which will be described later. In other words, the plurality of conveyor hydraulic pipes 58 transfer hydraulic oil from the storage tank 31 and the pump unit 32 to a portion of the conveyor 8 that is rearward of the swing hydraulic cylinders 22, 22 (see FIGS. 3, 5, etc.). Supply and discharge to and from. The swing hydraulic cylinders 22, 22 correspond to "a plurality of hydraulic cylinders" of the present invention. The pair of left and right swing hydraulic cylinders 22, 22 will be described later.

A main pipe 30B and a conveyor hydraulic pipe 58 extend rearward from the pump unit 32. The main pipe 30B is configured to be able to supply and discharge hydraulic oil to each of the pair of left and right swing hydraulic cylinders 22, 22. . The main pipe 30B and the conveyor hydraulic pipe 58 are provided so as to be offset to the left side of the traveling machine with respect to the center in the left-right direction of the machine.

A portion of the conveyor hydraulic piping 58 located in the gap between the rear part of the traveling machine and the front part of the conveyor 8 is supported by the swing-side clamp part 43 and the fixed-side clamp part 44. Therefore, the portion of the conveyor hydraulic piping 58 that is displaced as the conveyor 8 turns is limited to the portion between the turning side clamp section 43 and the stationary side clamp section 44. From this, it is possible to predict in advance the range in which the conveyor hydraulic piping 58 will be displaced, and there is no risk that the conveyor hydraulic piping 58 will unexpectedly interfere with other members or that the conveyor hydraulic piping 58 will unexpectedly get caught on other members. Reduced.

As shown in FIG. 3, round bar members 54 and 55 are provided at the front end of the conveyor 8, and a round bar member 56 is provided at the rear of the traveling body. The round bar members 54, 55, and 56 correspond to the "guide portion" of the present invention. The round bar member 54 is bent into a U-shape as shown in FIG. 6 in plan view, and is supported at both left and right ends of the front end of the conveyor 8. The round bar member 55 is provided on the left side of the front end of the conveyor 8, and is bent to extend along the upper edge and front edge of the left front wall 80F. The round bar member 56 is fixed to the rear left portion of the traveling body and is located below the fixed side clamp portion 44. The tip of the round bar member 56 extends outward from the side of the machine body (the side where the left rear wheel 2 is located), and the conveyor hydraulic piping 58 is connected to the conveyor hydraulic piping so that it does not hang down to the side where the left rear wheel 2 is located. I support 58.

When the conveyor 8 turns to the left side of the machine (the side where the left maximum turning position L1 is located in FIG. Wrap around the bottom of. However, it is possible that the conveyor hydraulic piping 58 gets caught in the lower front end of the conveyor 8 (corresponding to the leading edge of the front side wall 80F in side view in FIG. 3) during the conveyor 8's turn to the left side of the machine. . If this happens, there is a risk that the conveyor hydraulic piping 58 will not wrap around the lower part of the hopper 19, but will unexpectedly wind around the front lower end of the conveyor 8. In this embodiment, the portion of the conveyor hydraulic piping 58 between the swing-side clamp section 43 and the stationary-side clamp section 44 is designed to prevent it from falling into the gap between the rear part of the traveling machine and the front part of the conveyor 8. , is supported from below by a round bar member 54. This prevents the conveyor hydraulic piping 58 from getting caught on the lower front end of the conveyor 8. Note that the conveyor hydraulic piping 58 may be supported by the round bar member 54 and the round bar member 56 so as not to fall into the gap between the rear part of the traveling machine and the front part of the conveyor 8.

Further, when the conveyor 8 turns to the right side of the machine (the side where the right maximum turning position R1 is located in FIG. 19), the portion of the conveyor hydraulic piping 58 between the turning side clamp part 43 and the fixed side clamp part 44 , may hang down to the left front wall 80F. At this time, the conveyor hydraulic piping 58 is supported by the round bar member 56 so that it does not hang down to the side where the left rear wheel 2 is located.

When the conveyor 8 turns from the state in which it has turned to the right side of the machine body to the left side of the machine body, the portion of the conveyor hydraulic piping 58 between the swing side clamp part 43 and the fixed side clamp part 44 There is a possibility that it may get caught in the corner portion corresponding to the upper edge portion and the front edge portion of the front side wall 80F. In this embodiment, the round bar member 55 extends along the upper edge portion and the front edge portion of the left front wall 80F. Therefore, while the conveyor 8 is turning to the left side of the body, the conveyor hydraulic piping 58 is smoothly guided by the round bar member 55 into the space between the front part of the hopper 19 and the front lower end of the conveyor 8. As a result, the portion of the conveyor hydraulic piping 58 between the swing-side clamp portion 43 and the fixed-side clamp portion 44 is at an angle corresponding to the upper edge portion and the front edge portion of the left front wall 80F of the conveyor 8. It wraps around the lower part of the hopper 19 without getting caught on the parts. In this way, the round bar members 54, 55, and 56 prevent the conveyor hydraulic piping 58 from falling into the gap between the rear of the traveling machine and the front of the conveyor 8 at the connection point between the rear of the traveling machine and the conveyor 8. prevent.

[Support structure of conveyor]
The support structure of the conveyor 8 will be explained based on FIGS. 8 to 14. As shown in FIGS. 11 and 12, a swing frame body 21 is swingably connected to the conveyor support frame body 20 via a pin 35. As shown in FIGS. The rotating frame body 21 is configured to be able to rotate around the vertical axis X1, and the conveyor 8 is configured to be able to rotate around the vertical axis X1 using the lower end as a fulcrum. A pair of left and right hydraulically driven swing hydraulic cylinders 22, 22 are swingably connected to the conveyor support frame body 20 and the swing frame body 21 via pins 36, 36, respectively. Turn 8 left and right.

As shown in FIGS. 3, 8, and 9, a swing support portion 21T is provided at the rear upper portion of the swing frame body 21, and a bearing member 28 is provided at the upper portion of the swing support portion 21T. The bearing member 28 supports the swing shaft 23 of the conveyor 8. The swing shaft 23 is connected to the frame body of the conveyor 8. A horizontal axis Y1 exists at the center of the swing shaft 23, and the conveyor 8 is configured to be able to swing up and down about the horizontal axis Y1 using the lower end as a fulcrum. The horizontal axis Y1 is the swing axis of the conveyor 8. A pair of left and right lifting hydraulic cylinders 24, 24 are connected to the rear of the traveling machine and the conveyor 8, respectively. That is, a pair of left and right hydraulically driven lifting hydraulic cylinders 24, 24 are connected to the separation device 7 and the conveyor 8, respectively, and the lifting hydraulic cylinders 24, 24 drive the conveyor 8 to swing up and down.

As shown in FIG. 9, the bearing member 28 is provided with a boss portion 28A and a cylindrical portion 28B. The boss portion 28A is supported by a swing support portion 21T of the traveling body, that is, the swing frame body 21. A flange portion is formed on the boss portion 28A, and bolt holes are bored at equal intervals along the circumferential direction of the flange portion. A flange portion of the boss portion 28A is bolted to the swing support portion 21T. The cylindrical portion 28B is a so-called copper bushing, and is press-fitted into the boss portion 28A so as not to be relatively rotatable. The inner circumferential surface of the boss portion 28A and the outer circumferential surface of the swing shaft 23 come into sliding contact.

Since bolt holes are drilled at equal intervals in the flange portion of the boss portion 28A, the mounting position of the boss portion 28A relative to the swing support portion 21T can be reversed vertically. As the conveyor 8 swings up and down, the swing shaft 23 rotates relative to the cylindrical portion 28B, so the lower portion of the cylindrical portion 28B relative to the swing shaft 23 tends to wear out. On the other hand, the degree of wear of the portion of the cylindrical portion 28B located above the swing shaft 23 is smaller than that of the portion located below the swing shaft 23.

When the lower part of the cylindrical part 28B is worn out, the operator releases the bolts at the flange part of the boss part 28A, rotates the boss part 28A integrally with the cylindrical part 28B by 180 degrees, and then removes the boss again. The flange portion of the portion 28A is bolted to the swing support portion 21T. As a result, the portion of the cylindrical portion 28B that was located above the swing shaft 23 moves downward with respect to the swing shaft 23, so that the cylindrical portion 28B can be used further, and The frequency of replacing the shaped portion 28B is reduced. In other words, the bearing member 28 is configured such that its supporting attitude with respect to the swing shaft 23 can be changed by rotating the boss portion 28A and the cylindrical portion 28B around the horizontal axis Y1 of the swing shaft 23. .

As shown in FIG. 8, the bottom of the conveyor 8 is provided with a pair of left and right bottom frame parts 80D, 80D. 8 along the extending direction. The bottom frame parts 80D and 80D constitute the bottom part of the conveyor 8. Attachment parts 40, 40 are attached to the bottom frame parts 80D, 80D, respectively. Each of the attachment parts 40, 40 is supported by welding and fixing to the bottom frame parts 80D, 80D in a state located below the bottom frame parts 80D, 80D when viewed in the extending direction of the conveyor 8. Each of the attachment parts 40, 40 is formed in a triangular shape in a side view, and the thickness in the extending direction of the conveyor 8 increases toward the side where the bottom frame part 80D is located.

As shown in FIG. 10, each of the attachment parts 40, 40 is provided with a protrusion 40A, and the protrusion 40A protrudes laterally when viewed in the direction in which the conveyor 8 extends. That is, each of the attachment parts 40, 40 protrudes to both left and right sides of the conveyor 8. The respective ends of the lifting hydraulic cylinders 24, 24 are connected to the protrusions 40A, 40A. A horizontal frame 41 is horizontally suspended over the pair of left and right mounting portions 40, 40, and the horizontal frame 41 is connected to the left and right mounting portions 40, 40, respectively. Both left and right end portions of the horizontal frame 41 are welded and fixed to the mounting portions 40, 40, respectively. In this way, the bottom of the conveyor 8 is provided with the left and right attachment parts 40, 40, and the horizontal frame 41 connected to the left and right attachment parts 40, 40, respectively.

This reinforces the rigidity of the attachment parts 40, 40. Moreover, since the attachment parts 40, 40 receive the downward moment load of the conveyor 8, stress tends to be concentrated on the attachment parts 40, 40. In this embodiment, each of the attachment parts 40, 40 is formed in a triangular shape when viewed from the side, so that the stress in the attachment parts 40, 40 is alleviated.

The lifting hydraulic cylinders 24, 24 are connected to the bottom of the conveyor 8 from the rear of the traveling machine, passing along the sides of the conveyor 8. In other words, the lifting hydraulic cylinders 24, 24 extend from the separation device 7, passing through the sides of the conveyor 8, to a pair of left and right mounting portions 40, 40 located on the lower side of the conveyor 8 when viewed in the direction in which the conveyor 8 extends. It is extended and connected to a pair of left and right mounting portions 40, 40. The lifting hydraulic cylinders 24, 24 are connected to a coupling body 26 of the separating device 7. With the above configuration, the conveyor 8 is supported by the conveyor support frame 20 and the separation device 7.

The lifting hydraulic cylinders 24, 24 are connected by attachment parts 40, 40, and the attachment parts 40, 40 are located on the lower side when viewed in the direction in which the conveyor 8 extends. Therefore, compared to a configuration in which the lifting hydraulic cylinders 24, 24 are connected at the upper part when viewed in the extending direction of the conveyor 8, the stroke amount of the lifting hydraulic cylinders 24, 24 becomes longer, and the lifting amount of the conveyor 8 becomes larger. Become. In other words, the configuration in which the lifting hydraulic cylinders 24, 24 are connected at the lower side when viewed in the extending direction of the conveyor 8 is compared with the configuration in which the lifting hydraulic cylinders 24, 24 are connected at the upper portion when viewed in the extending direction of the conveyor 8. As a result, the conveyor 8 can be lowered significantly.

As shown in FIG. 8, when the conveyor 8 is located at the highest position on the ascending side, the longitudinal direction of each of the lifting hydraulic cylinders 24, 24 is along the horizontal direction. Moreover, each of the lifting hydraulic cylinders 24, 24 is arranged so as to extend and contract along the extending direction of the conveyor 8 in a plan view (see FIG. 15). Therefore, no lateral torsional force acts on the conveyor 8, the lifting hydraulic cylinders 24, 24, and the connecting bodies 26, 26.

The moment load of the conveyor 8 acts on the pair of left and right connecting bodies 26, 26 via the lifting hydraulic cylinders 24, 24. With the configuration of this embodiment, it becomes difficult for forces in the left and right directions and up and down directions to act on the pair of left and right connecting bodies 26, 26, and the forces acting on the pair of left and right connecting bodies 26, 26 tend to concentrate in the front and back direction. Become. As a result, the shear stress on the pair of left and right connecting bodies 26, 26 is reduced, and the connecting bodies 26, 26 can firmly support the conveyor 8.

Further, a pair of left and right chain bodies 29, 29 are provided below the lifting hydraulic cylinder 24. The chain bodies 29, 29 are connected to the rear part of the traveling machine and the conveyor 8, respectively, in a state located below the lifting hydraulic cylinders 24, 24 when viewed in the extending direction of the lifting hydraulic cylinders 24, 24. . Both ends of the chain body 29 are connected to a portion of the connecting body 26 that is lower than the connecting portion with the lifting hydraulic cylinder 24, and a portion of the connecting body 26 that is lower than the connecting portion with the lifting hydraulic cylinder 24, and a portion of the chain body 29 that is lower than the attachment portion 40 of the plurality of diagonal frames 80I provided on the conveyor 8. The frame 80I is connected to the diagonal frame 80I located on the upper side in the direction. The chain body 29 is pivotally supported within the left and right width of the diagonal frame 80I at the upper part of the diagonal frame 80I. The chain body 29 is inclined so that the rear side of the conveyor 8 approaches the lateral inner side of the conveyor 8 in plan view. The diagonal frame 80I is located on the left and right sides of the conveyance path of the conveyor 8. When the lifting hydraulic cylinders 24, 24 are contracted and the conveyor 8 is raised, the pair of left and right chains 29, 29 are relaxed.

For example, when the lifting hydraulic cylinders 24, 24 are removed from the machine body during maintenance, the chain bodies 29, 29 restrict downward swinging of the conveyor 8. Therefore, the length of the chain bodies 29, 29 is longer than the longest length of the lifting hydraulic cylinders 24, 24 so that the stroke amount of the lifting hydraulic cylinders 24, 24 is not restricted during actual field work. It is configured as follows. Note that details of the connecting body 26 will be described later.

[About the swing hydraulic cylinder]
As shown in FIGS. 11 to 14, the swing hydraulic cylinders 22, 22 are distributed to the left and right with the vertical axis X1 in between, with the conveyor 8 extending along the longitudinal direction of the machine body. The swing hydraulic cylinders 22, 22 are double-acting hydraulic cylinders. The swinging hydraulic cylinders 22, 22 are connected to the rear part of the traveling machine and the conveyor 8 in a state in which they are distributed left and right with respect to the vertical axis X1, and drive the conveyor 8 to swing left and right.

The conveyor support frame body 20 is provided with an upper plate part 20A and a lower plate part 20B, and the swing hydraulic cylinders 22, 22 are located in the space between the upper plate part 20A and the lower plate part 20B. The rotating frame body 21 is also provided with a pair of upper and lower upper plate portions 21A, 21B and a pair of upper and lower lower plate portions 21C, 21D. The upper plate part 20A is inserted between the upper and lower pair of upper plate parts 21A and 21B, and the lower plate part 20B is inserted between the upper and lower pair of lower plate parts 21C and 21D. The swing hydraulic cylinders 22, 22 are located in the space between the upper plate part 21B and the lower plate part 21C.

As described above, the rotating frame body 21 is supported by the conveyor support frame body 20 so as to be rotatable around the vertical axis X1. The upper plate portion 20A and a pair of upper and lower upper plate portions 21A and 21B are rotatably connected by a pin 35. Further, the lower plate portion 20B and the pair of upper and lower lower plate portions 21C and 21D are rotatably connected by another pin 35. The swing hydraulic cylinders 22, 22 are located between the upper and lower pins 35, 35. Thereby, interference between the swing hydraulic cylinders 22, 22 and the pin 35 is avoided.

Branch pipes 30A, 30A, 30A, 30A are connected as a plurality of hydraulic pipes 30 to the swing hydraulic cylinders 22, 22, respectively. As shown in FIG. 7, a storage tank 31, a pump unit 32, and a direction switching valve 33 are provided on the left side of the front part of the machine body. The storage tank 31, the pump unit 32, and the directional control valve 33 are configured as a driving source for the swing hydraulic cylinders 22, 22.

In this embodiment, one hydraulic pipe 30 includes one main pipe 30B, a branch part 34, and two branch pipes 30A, 30A. 11 to 14 show branch pipes 30A, 30A, 30A, 30A, main pipes 30B, 30B, and bifurcated branch parts 34, 34. The main pipe 30B is connected to a storage tank 31 and a pump unit 32. The branching portion 34 branches the main pipe 30B into a plurality of pipes on the front side of the machine body with respect to the vertical axis X1 in the hydraulic pipe 30, corresponding to each of the two swing hydraulic cylinders 22, 22. The hydraulic oil is pumped from the storage tank 31 by the pump unit 32 to each of the swing hydraulic cylinders 22, 22 via the directional control valve 33, main pipe 30B, branch section 34, and branch pipe 30A.

As shown in FIG. 7, a travel transmission section 52 is provided between the left and right rear wheels 2 and located below the rear of the conveyance device 6. The traveling transmission section 52 transmits the power of the engine 9 to the left and right rear wheels 2. The travel transmission section 52 is supported by the body frame 15. The travel transmission section 52 has a hydrostatic continuously variable transmission mechanism and a gear type transmission mechanism. The gear type transmission mechanism is arranged at the left and right center of the travel transmission section 52. An axle extends on both left and right sides of the gear type transmission mechanism, and a gear type reduction mechanism is provided at the extending end of the axle.

The branch portions 34 , 34 are supported by the body frame 15 in a state located directly below the travel transmission portion 52 . A support member 15A that protrudes upward and supports each of the branch parts 34, 34 in a swingable manner is provided on the left side of the body frame 15. Supported for free movement. The main pipes 30B, 30B and the branch portions 34, 34 are provided so as to be offset to one side of the left and right sides of the machine with respect to the center in the left-right direction of the machine.

As shown in FIG. 11, the body frame 15 includes mounting parts 15B, 15B, a pair of left and right front and rear frame parts 15C, 15C, and a lateral frame part 15D. The front and rear frame portions 15C, 15C extend in the front and rear direction, and a horizontal frame portion 15D spans across the front and rear frame portions 15C, 15C. The support member 15A is supported by a horizontal frame portion 15D, and a pair of upper and lower branch portions 34, 34 are supported by the support member 15A. Both longitudinal ends of the horizontal frame portion 15D are welded to the front and rear frame portions 15C, 15C. Each of the mounting portions 15B, 15B is located above a connecting portion between the front and rear frame portions 15C and the horizontal frame portions 15D. The travel transmission section 52 is supported by a pair of left and right mounting sections 15B, 15B. The branch parts 34, 34 are located between the pair of left and right placing parts 15B, 15B in plan view.

As shown in FIGS. 11 to 14, two sets of branch pipes 30A, 30A are connected to the oil chamber on the head side and the oil chamber on the rod side of the cylinder portion of one swing hydraulic cylinder 22, respectively. has been done. The swing hydraulic cylinder 22 expands and contracts by controlling the supply and discharge of hydraulic oil to the head side and rod side of the cylinder portion of the swing hydraulic cylinder 22. When the swing hydraulic cylinder 22 extends, the oil chamber on the head side becomes an oil chamber for extension, and the oil chamber on the rod side becomes an oil chamber for contraction. Further, when the swing hydraulic cylinder 22 contracts, the oil chamber on the head side serves as a contraction oil chamber, and the rod side oil chamber serves as an extension oil chamber.

One branch 34 is connected to the storage tank 31, pump unit 32, and directional control valve 33 by one main pipe 30B, and has two branches connected to each of the pair of swing hydraulic cylinders 22, 22. It branches into pipes 30A and 30A. One of the branch pipes 30A, 30A connected to one branch part 34 is connected to the oil chamber on the head side of one of the pair of swing hydraulic cylinders 22, 22. Further, the other end of the branch pipes 30A, 30A connected to one branch portion 34 is connected to a rod-side oil chamber in one of the pair of swing hydraulic cylinders 22, 22.

The pair of main pipes 30B, 30B are connected across the direction switching valve 33 and the branch parts 34, 34 as extension pipes and contraction pipes for the swing hydraulic cylinders 22, 22. A total of four branch pipes 30A, 30A, 30A, 30A are arranged corresponding to the pair of branch parts 34, 34 and the pair of swing hydraulic cylinders 22, 22. The four branch pipes 30A, 30A, 30A, 30A extend from the branch parts 34, 34 to the swing hydraulic cylinders 22, 22 passing below the travel transmission part 52.

One of the main pipes 30B, 30B and the branch pipes 30A, 30A connected to the extension oil chambers of the swing hydraulic cylinders 22, 22 are extension pipes. The pump unit 32 pumps hydraulic oil from the storage tank 31 to the extension oil chambers in the swing hydraulic cylinders 22, 22 via the extension piping. The other of the main pipes 30B, 30B and the branch pipes 30A, 30A connected to the contraction oil chambers of the swing hydraulic cylinders 22, 22 are contraction pipes. Hydraulic oil from the contraction oil chambers in the swing hydraulic cylinders 22, 22 is returned to the storage tank 31 via the contraction piping.

In other words, as a multiple hydraulic piping 30, an extension pipe for extending the extension of an extension oil in a pair of turn hydraulic cylinders 22 and 22, and a contraction oil compartment in a pair of turn hydraulic cylinders 22 and 22. It is equipped with shrinkage piping for supplying and discharging oil. When the directional switching valve 33 is switched, the extension pipe and the contraction pipe are switched between the pair of main pipes 30B, 30B and the four branch pipes 30A, 30A, 30A, 30A.

Among the branch parts 34, 34, one corresponding to the extension pipe becomes an extension branch part, and the other corresponding to the contraction pipe becomes a contraction branch part. In other words, as a pair of branch parts 34, 34, an extension branch part branches the extension pipe corresponding to the extension oil chamber in the swing hydraulic cylinders 22, 22, and a contraction pipe branches the contraction pipe in the swing hydraulic cylinders 22, 22. A contraction branch part that branches corresponding to the oil chamber is provided. When the direction switching valve 33 is switched, the extension branch and the contraction branch in the branch parts 34, 34 are switched.

The conveyor 8 swings left and right as one of the swing hydraulic cylinders 22, 22 extends and the other of the swing hydraulic cylinders 22, 22 contracts. When the conveyor 8 extends in the longitudinal direction of the machine body in a plan view, each of the left and right swing hydraulic cylinders 22, 22 is inclined such that the rear side is located closer to the center of the machine body in a plan view. When the conveyor 8 swings left and right, the swing hydraulic cylinder 22 on the right side of the machine swings around the swing axis X2R, and the swing hydraulic cylinder 22 on the left side of the machine swings around the swing axis X2L (Figs. 14).

The branch pipes 30A, 30A, 30A, 30A are flexible and elastically deform following the swinging of the swing hydraulic cylinders 22, 22, respectively. However, if the degree of deformation of the branch pipes 30A, 30A, 30A, 30A increases, a load will be applied to the branch pipes 30A, 30A, 30A, 30A, which may adversely affect the durability of the branch pipes 30A, 30A, 30A, 30A. be. In order to eliminate such inconveniences, in this embodiment, the bifurcated branch parts 34, 34 are configured to be swingable left and right. That is, each of the branch parts 34, 34 is configured to be able to swing around the vertical axis X3 following the turning of the conveyor 8. The axis X3 corresponds to the "second axis" of the present invention. The branch portions 34, 34 are provided in a portion on the front side of the machine body with respect to the vertical axis X1. The axis X3 is set at a location in front of the pair of left and right swing hydraulic cylinders 22, 22. In the support member 15A, each of the branch portions 34, 34 is arranged vertically and is configured to be swingable around one axis X3.

As shown in FIGS. 13 and 14, when the left and right swing hydraulic cylinders 22, 22 respectively swing following the swing of the conveyor 8, the branch parts 34, 34 cause the swing hydraulic cylinders 22, 22 to swing. It follows the motion and swings around the axis X3. Further, the main pipes 30B, 30B have flexibility, and as the branch parts 34, 34 swing, the connecting portions of the main pipes 30B, 30B to the branch parts 34, 34 elastically deform in the left-right direction. The axis X3 is set at a position on the extension of the main pipe 30B in the branch portion 34 in plan view. 13 and 14 show an extension line L11 of the main piping 30B at the branch portion 34. The extension line L11 intersects with the axis X3. Therefore, even if the branch portions 34, 34 swing, unreasonable elastic deformation is less likely to occur in the main pipes 30B, 30B.

With the above configuration, even if pulling force or pressing force acts on each of the branch pipes 30A, 30A, 30A, 30A due to the swinging of the swing hydraulic cylinders 22, 22, the pulling force or pressing force is branched. This is absorbed by the rocking of the sections 34, 34 and the elastic deformation of the main piping 30B, 30B. For this reason, unreasonable elastic deformation is less likely to occur in the branch pipes 30A, 30A, 30A, 30A.

[About the interlocking mechanism between the conveyor and the hood]
In this embodiment, the hood part 71 is configured to be able to turn following the turning of the conveyor 8. As shown in FIGS. 15 to 18, the outer peripheral portion of the case portion 70 of the separation device 7 above the input port 70i is formed into a cylindrical shape with the vertical axis X1 as the central axis. A flange portion 70f is formed on the cylindrical outer peripheral portion of the case portion 70, and the flange portion 70f has a horizontal surface portion over the entire circumference. A cable member 25 is wound around a semicircumference of the outer peripheral portion of the case portion 70 on the side opposite to the side where the conveyor 8 is located, and the cable member 25 is placed on the flange portion 70f. .

The cable body 25 is a so-called chain. Connecting bodies 26, 26 are connected to both left and right ends of the cable-like body 25, respectively, and the connecting bodies 26, 26 are placed on the flange portion 70f. Further, one end portion of the lifting hydraulic cylinders 24, 24 is connected to each of the connecting bodies 26, 26, and the other end portion of the lifting hydraulic cylinders 24, 24 is connected to the central region in the longitudinal direction of the conveyor 8. That is, the left and right connecting bodies 26, 26 connect the left and right side parts of the conveyor 8 and both ends of the cable body 25.

A cable-shaped body 27, which is different from the cable-shaped body 25, is wound around the outer circumference of the case portion 70 over the pair of left and right connecting bodies 26, 26. The cable body 27 is a so-called chain. The cable-shaped body 27 extends over a half circumference of the outer peripheral portion of the case portion 70 on the side where the conveyor 8 is located. Moreover, the cable-like body 27 is placed on the flange portion 70f. That is, the cable-like bodies 25 and 27 are wound around the outer circumferential portion of the case portion 70 while being placed on the flange portion 70f. The cable-like bodies 25 and 27 are connected by a pair of left and right connecting bodies 26 and 26. Thereby, the cord-like body 25 is configured so as not to come off from the outer circumferential portion, and the cord-like bodies 25 and 27 are configured to be rotatable along the cylindrical outer circumferential portion of the case portion 70.

As is well known, the cables 25 and 27 are composed of a plurality of pins and a pair of plates connecting adjacent pins. A roller is fitted around each pin of the cable-like bodies 25 and 27, and each roller rolls on the cylindrical outer peripheral portion of the case portion 70. As shown in FIG. 18, each of the connecting bodies 26, 26 is provided with three first roller parts 26A and two second roller parts 26B. The first roller portion 26A rotates around the vertical axis and rolls on the cylindrical outer peripheral portion of the case portion 70. The second roller portion 26B rotates around the horizontal axis and rolls on the flange portion 70f.

When the lifting hydraulic cylinders 24, 24 extend, the conveyor 8 descends while swinging around the horizontal axis Y1, and the lifting hydraulic cylinders 24, 24 swing downward. At this time, a downward force acts on each of the connecting bodies 26, 26, but the downward force is firmly received by the second roller portion 26B of the connecting body 26.

When the conveyor 8 turns left and right, the lifting hydraulic cylinders 24, 24 follow the conveyor 8 and turn around the vertical axis X1. As the lifting hydraulic cylinders 24, 24 swing, the cable bodies 25, 27 and the connecting bodies 26, 26 rotate integrally around the vertical axis X1 on the flange portion 70f. In this way, the cable-shaped body 25 is wound around the outer circumferential portion of the case portion 70 on the side opposite to the side where the conveyor 8 is located, and is moved around the outer circumferential portion of the case portion 70 in conjunction with the rotation of the conveyor 8. rotate along.

As an interlocking mechanism between the conveyor 8 and the hood portion 71, first locking portions 25H, 25H and a second locking portion 71H are provided. The first locking portions 25H, 25H are provided on the cable-like body 25 and protrude toward the outer circumferential side of the rotational trajectory of the cable-like body 25. The first locking portions 25H, 25H rotate around the vertical axis X1 in conjunction with the rotation of the conveyor 8. From this, the rotation axis of the conveyor 8 and the rotation axis of the first locking parts 25H, 25H are the same axis. As shown in FIGS. 15, 17, and 18, each of the first locking portions 25H, 25H is provided with a locking piece 25j. That is, the two locking pieces 25 and 25j are distributed and arranged on one side and the other side with respect to the second locking portion 71H in the circumferential direction around the vertical axis X1.

The second locking portion 71H is fixed to the hood portion 71. The second locking portion 71H extends downward from the bottom member 71B of the hood portion 71 and is supported by the bottom member 71B. The second locking portion 71H is adjacent to the outer peripheral side with respect to the rotational trajectory of the cable-like body 25, and is between the pair of first locking portions 25H, 25H in the rotational circumferential direction of the cable-like body 25. To position.

As shown in FIGS. 17 and 18, the first locking portion 25H is connected to the cable-like body 25 via a pair of upper and lower attachment plates 25i, 25i. The attachment plate 25i also serves as a plate for connecting adjacent pins in the cable member 25, and has a shape different from other plates. In other words, a mounting plate 25i is provided that spans adjacent pins in the cable-like body 25 as a chain. The mounting plate 25i extends radially outward with respect to the vertical axis X1 relative to the other plates in the cable body 25, and bolt insertion holes are formed in the extending portion of the mounting plate 25i. A bolt insertion hole corresponding to the bolt insertion hole of the mounting plate 25i is also formed in the first locking portion 25H.

The operator inserts a bolt into the bolt insertion hole and fastens it with a nut while the bolt insertion hole of the first locking portion 25H and the bolt insertion hole of the mounting plate 25i are overlapped. Further, when the operator unfastens the bolt and pulls it out from the bolt insertion hole, the first locking portion 25H is removed from the mounting plate 25i. Therefore, the operator can easily replace the first locking portion 25H. In this way, the first locking portion 25H is detachably supported by the mounting plate 25i.

An attachment portion 71i is formed on the bottom member 71B of the hood portion 71, and the attachment portion 71i extends radially outward with respect to the vertical axis X1 beyond the rotational trajectory of the cord-like body 25 in plan view. A bolt insertion hole is formed in the part. The second locking portion 71H is bolted to the extending portion of the mounting portion 71i. Therefore, the operator can easily replace the second locking portion 71H.

That is, the first locking portions 25H, 25H are bolted to the cord-like body 25, and the second locking portion 71H is bolted to the bottom member 71B. Therefore, the first locking portions 25H, 25H and the second locking portion 71H are configured to be removable by releasing the bolt connection. As a result, when each of the first locking portions 25H, 25H and the second locking portion 71H wear out, the respective first locking portions 25H, 25H and the second locking portion 71H wear out. Easy to replace.

As described above, when the conveyor 8 turns left and right, the cable-like bodies 25 and 27 follow the turning of the conveyor 8 and turn along the cylindrical outer peripheral portion of the case portion 70. At this time, the pair of first locking portions 25H, 25H also rotate integrally with the cable-like bodies 25, 27. When either of the pair of first locking parts 25H, 25H comes into contact with the second locking part 71H, the hood part 71 follows the rotation of the second locking part 71H and turns around the vertical axis X1. do.

As shown in FIG. 19, the conveyor 8 is capable of turning between a maximum left turning position L1 and a maximum right turning position R1. The conveyor 8 is configured to be able to turn left and right with respect to the left and right center position CT up to a maximum turning angle θ1. The maximum turning angle θ1 is set to, for example, 87.5 degrees, but this angle can be changed as appropriate, and may be an angle exceeding 90 degrees. Further, the hood portion 71 can be pivoted between a left maximum pivot position L2 and a right maximum pivot position R2. The hood portion 71 is configured to be able to pivot left and right to a maximum pivot angle θ2 across the left and right center position CT. The maximum turning angle θ2 is set to, for example, 60 degrees, but this angle can be changed as appropriate. Note that the maximum turning angle θ2 is smaller than the maximum turning angle θ1.

When the conveyor 8 turns to the left side of the machine (the side where the left maximum turning position L1 is located), the cable-like bodies 25, 27 and the first locking parts 25H, 25H turn clockwise in plan view. At this time, among the first locking parts 25H, 25H shown in FIG. 15, the first locking part 25H on the left side of the body becomes the first locking part 25H on the upper side in the rotation direction, and The stop portion 25H becomes a first stop portion 25H on the lower side in the rotation direction.

When the conveyor 8 turns to the right side of the body (the side where the right maximum turning position R1 is located), the cable-shaped bodies 25, 27 and the first locking parts 25H, 25H turn counterclockwise in plan view. At this time, among the first locking parts 25H, 25H shown in FIG. 15, the first locking part 25H on the right side of the body becomes the first locking part 25H on the upper side in the rotation direction, and The stop portion 25H becomes a first stop portion 25H on the lower side in the rotation direction.

When the first locking portions 25H, 25H rotate clockwise or counterclockwise, the locking piece 25j of the first locking portion 25H on the upper side in the rotational direction with respect to the second locking portion 71H engages in the second locking portion 25H. The locking piece 25j of the first locking portion 25H on the downstream side in the rotational direction with respect to the second locking portion 71H moves away from the second locking portion 71H while approaching and abutting the locking portion 71H. Then, with the locking piece 25j of the first locking portion 25H on the upper side in the rotational direction and the second locking portion 71H in contact with the second locking portion 71H, the cable-like bodies 25, 27 When the first locking parts 25H and 25H rotate clockwise, the hood part 71 rotates clockwise. Moreover, the cable-like bodies 25, 27 are in contact with the second locking part 71H and the locking piece 25j of the first locking part 25H on the upper side in the rotational direction with respect to the second locking part 71H. As the first locking portions 25H and 25H rotate counterclockwise, the hood portion 71 rotates counterclockwise.

In a state where the second locking part 71H is spaced apart from each of the first locking parts 25H, 25H at equal intervals, the second locking part 71H is ( The phase is shifted by θ1-θ2). From this, when the conveyor 8 turns left and right by (θ1-θ2), the second locking portion 71H and one of the first locking portions 25H, 25H come into contact, and the hood portion 71 The vehicle turns with a phase shift of (θ1-θ2). The specific angle of (θ1-θ2) is set to, for example, 27.5 degrees, but this angle can be changed as appropriate. In this way, the first locking parts 25H, 25H and the second locking part 71H as interlocking mechanisms have a preset phase difference between the rotation angle position of the conveyor 8 and the rotation angle position of the hood part 71. Rotate the hood part 71 so that

Generally, when a sugarcane harvester is harvesting, a transport vehicle having an open loading platform runs parallel to the sugarcane harvester in a state where it is located on the cut area side of the sugarcane harvester, and the conveyor 8 is on the side where the open loading platform is located. Turn towards. At this time, the hood part 71 rotates with a phase shift of (θ1-θ2) with respect to the conveyor 8. Therefore, the foreign matter separated from the crops by the separating device 7 is discharged from the hood part 71 to the cut field diagonally rearward of the machine without landing on the conveyor 8.

[About the structure of the conveyor]
As shown in FIGS. 20 to 25, the conveyor 8 includes a driving wheel body 81, a driven wheel body 82, a pair of left and right endless rotating chains 85, 85, a plurality of conveyors 86, and a plurality of bottom members. 87 is provided. The drive wheel body 81 is provided at the rear upper part of the conveyor 8, that is, at the conveyance terminal end. The drive wheel body 81 is equipped with a hydraulic motor 81M, and the drive wheel body 81 is rotated around the horizontal axis Y3 by rotational drive of the hydraulic motor 81M (see FIG. 23). The driven wheel body 82 is located at the front lower end of the conveyor 8, that is, at the conveyance start end, and rotates around the horizontal axis Y2. The driven wheel body 82 is supported by a pair of left and right front walls 80F, 80F (see FIGS. 9, 25, and 26). The front wall 80F on the left side of the machine body is bolted to the frame of the conveyor 8, and the front wall 80F on the right side of the machine body is fixed to the frame of the conveyor 8 by welding.

A pair of left and right endless rotation chains 85, 85 are wound around the driving wheel body 81 and the driven wheel body 82, respectively. A pair of left and right endless rotating chains 85, 85 circulate on a conveyance path in the conveyor 8 and a return path opposite to the conveyance path. When viewed from the left side of the aircraft as illustrated in FIGS. 1, 5, 20, 24, etc., the endless rotating chains 85, 85 rotate clockwise across the driving wheel body 81 and the driven wheel body 82. move. The return path faces downwardly to the transport path. In other words, the conveyor 8 is configured such that the conveyance path is located above the return path.

Each of the plurality of conveyors 86 is attached to a pair of left and right endless rotation chains 85, 85. The plurality of conveyance bodies 86 lock and convey the harvested product on the conveyance path by rotating together with the endless rotation chains 85, 85. The plurality of bottom members 87 are arranged in a line along the extending direction of the conveyor 8 and constitute the bottom of the conveyance path. Further, the bottom member 87 is located in an upper and lower intermediate region when viewed in the direction in which the conveyor 8 extends. From this, the upper side of the rotational trajectory of the endless rotational chains 85, 85 with respect to the bottom member 87 is the conveyance path, and the lower side of the rotational trajectory of the endless rotational chains 85, 85 with respect to the bottom member 87 is the return path. It is.

With the harvested product placed on the bottom member 87, the conveyor 86 moves diagonally upward, thereby transporting the harvested product toward the rear upper part of the conveyor 8 (conveyance end portion). If the distance between the plurality of conveyors 86 is too short, the total weight of the conveyor 8 including the harvested products tends to become heavy. Furthermore, if the intervals between the plurality of conveyors 86 are too long, the amount of the conveyor 8 to be transported by the conveyor 8 will be smaller than the amount of the harvested material falling from the separation device 7, and there is a risk that the harvested material will easily accumulate in the hopper 19. be. In this embodiment, the intervals between the plurality of conveyors 86 are determined by considering the vehicle speed at the time of reaping (for example, 0.6 m/s to 1.0 m/s), and the total weight of the conveyor 8 including the harvested material is determined. It is designed to transport crops securely without becoming too heavy.

The entire conveyor 8 is supported by a frame body having a framework structure. As shown in FIGS. 20, 21, 24, and 25, the frame body includes left and right upper frame parts 80U, 80U, left and right bottom frame parts 80D, 80D, and a plurality of vertical frame parts 80V, It has left and right intermediate frames 80C, 80C and a horizontal frame 80L. The left and right upper frame portions 80U, 80U are located above the endless rotating chain 85. Further, the left and right bottom frame portions 80D, 80D are located below the endless rotating chain 85. The left and right upper frame parts 80U, 80U and the left and right bottom frame parts 80D, 80D extend parallel to each other. The plurality of vertical frame parts 80V are provided at appropriate intervals along the longitudinal direction of the upper frame parts 80U, 80U and the bottom frame parts 80D, 80D. In other words, the plurality of vertical frame parts 80V are provided at intervals along the extending direction of the endless rotating chain 85, connect the upper frame part 80U and the bottom frame part 80D, and connect the upper frame part 80U and the bottom frame part 80U. It is connected to the frame portion 80D. The plurality of vertical frame parts 80V connect the upper frame parts 80U, 80U and the bottom frame parts 80D, 80D. The horizontal frame 80L connects the left and right intermediate frames 80C, 80C.

A frame body of the conveyor 8 is provided with a plurality of diagonal frames 80I that connect adjacent vertical frame portions 80V, 80V to each other. The diagonal frame 80I connects the upper part of one of two adjacent vertical frame parts 80V, 80V among the plurality of vertical frame parts 80V, and the lower part of the other of the two vertical frame parts 80V, 80V. Further, an intermediate frame 80C is supported at the vertical center of the vertical frame portion 80V, and the intermediate frame 80C has a C-shaped cross section, and extends in the respective extending directions of the upper frame portions 80U, 80U and the bottom frame portions 80D, 80D. extends parallel to. The intermediate frame 80C and the vertical frame portion 80V are fixed by welding at the vertical center.

The plurality of horizontal frames 80L are provided at appropriate intervals along the longitudinal direction of the left and right intermediate frames 80C, 80C. The inner end of the intermediate frame 80C is located laterally inward than the upper frame portions 80U, 80U and the bottom frame portions 80D, 80D, respectively. In this way, the frame body of the conveyor 8 is constructed into a truss structure by the upper frame parts 80U, 80U, the bottom frame parts 80D, 80D, the vertical frame part 80V, the diagonal frames 80I, 80I, the intermediate frames 80C, 80C, and the horizontal frame 80L. has been done. This increases the rigidity of the frame body of the conveyor 8.

Plate-shaped side covers 89 are provided on the left and right sides of the conveyance start end side of the conveyor 8 (see FIGS. 3, 8, and 9). The side cover 89 is bolted to the vertical frame portion 80V laterally outside the vertical frame portion 80V, and is located laterally outside the left and right pair of endless rotation chains 85, 85. The upper end of the side cover 89 is extended to such an extent that it is positioned higher than the height of the worker standing in the field. The side cover 89 may be located laterally inward of the fuselage than the vertical frame portion 80V, or may be located laterally inward of the fuselage than the upper frame portions 80U, 80U and bottom frame portions 80D, 80D. It may be.

As shown in FIGS. 20 and 21, the portion of the endless rotating chain 85 that rotates on the transport path side is guided by a first upper guide rail section 83U and a second upper guide rail section 83D. The first upper guide rail section 83U is supported by the upper frame section 80U, and the second upper guide rail section 83D is supported by the intermediate frame 80C. In other words, the left and right upper frame parts 80U, 80U support the left and right first upper guide rail parts 83U, 83U, and the left and right intermediate frames 80C, 80C support the second upper guide rail parts 83D, 83D. The first upper guide rail section 83U and the second upper guide rail section 83D guide the movement of the left and right endless rotation chains 85, 85 on the conveyance path. Further, the portion of the endless rotating chain 85 that rotates on the return path side is guided by the lower guide rail portion 84, and the slack of the endless rotating chain 85 on the return path is reduced by the lower guide rail portion 84. Each of the first upper guide rail section 83U, the second upper guide rail section 83D, and the lower guide rail section 84 is detachably supported by the plurality of vertical frame sections 80V.

The conveyance start end of the conveyor 8 is shown in FIGS. 24 and 25. A vertically inclined portion 83a and a horizontally inclined portion 83b are formed at the starting end in the conveying direction of the second upper guide rail portion 83D. The starting end of the second upper guide rail portion 83D in the conveyance direction is located on the downstream side of the driven wheel body 82 in the conveyance direction. The vertically inclined portion 83a and the horizontally inclined portions 83b at the starting end in the conveyance direction of the second upper guide rail portion 83D are entrance portions for receiving the endless rotating chains 85, 85. The cross-sectional shape of the inlet portion is formed in such a shape that it becomes wider toward the starting end in the conveyance direction, further away from the endless rotation chains 85, 85 in the vertical and horizontal directions.

The vertically inclined portion 83a is inclined so that the upper side in the conveyance direction is positioned lower. Further, the left and right inclined portions 83b are inclined so that the upper side in the conveyance direction is located laterally outward. As a result, after the endless rotating chain 85 rotates along the outer periphery of the driven wheel body 82, the endless rotating chain 85 is moved to the first upper guide rail portion 83U by the vertically inclined portion 83a and the left and right inclined portions 83b. and the second upper guide rail portion 83D.

As shown in FIG. 21, the left and right intermediate frames 80C, 80C protrude toward the left and right center portions of the conveyor 8 by a width W1 from the lateral inner portions of the second upper guide rail portions 83D, 83D. The area of width W1 in the intermediate frames 80C, 80C is the protruding portion of the intermediate frames 80C, 80C. That is, a protrusion that protrudes toward the left and right center of the conveyor 8 than the lateral inner parts of the second upper guide rail parts 83D, 83D is formed on the lateral inner parts of the left and right intermediate frames 80C, 80C.

As shown in FIG. 20, the bottom member 87 is mounted and supported by the horizontal frame 80L. The horizontal frame 80L is positioned below the bottom member 87 and is horizontally suspended across the left and right intermediate frames 80C, 80C. As shown in FIG. 21, downward bent portions 87a, 87a are formed at both left and right ends of the bottom member 87 in the lateral direction of the conveyor 8. The bent portions 87a, 87a protrude downward along the vertical direction, and are located at the left and right lateral inner portions 80a, 80a of the protruding portions of the left and right intermediate frames 80C, 80C (regions of width W1 in the intermediate frames 80C, 80C). is bolted to. That is, the bent portions 87a, 87a are attachment portions for the protruding portions of the left and right intermediate frames 80C, 80C. Thereby, the bottom member 87 is supported by the left and right intermediate frames 80C, 80C.

As shown in FIG. 21, the bottom member 87 extends over the lateral inner portions 80a, 80a of the protruding portions (regions of width W1 in the intermediate frames 80C, 80C) of the left and right intermediate frames 80C, 80C. In other words, the bottom member 87 is supported by the left and right intermediate frames 80C, 80C, and has a width narrower than the distance between the left and right first upper guide rail parts 83U, 83U and second upper guide rail parts 83D, 83D. has been done.

As shown in FIG. 20, downward bent portions 87b, 87b are formed at both ends of the bottom member 87 in the longitudinal direction of the conveyor 8, and the adjacent bottom members 87, 87 are connected by bolts at the bent portion 87b. be done. In other words, the bottom member 87 is mounted and supported by the horizontal frame 80L, and is connected with bolts on all four sides, front, rear, left and right.

When the harvested product is conveyed by the conveyor 8, the harvested product is conveyed on the bottom member 87, so the harvested product and the bottom member 87 come into sliding contact, and the bottom member 87 tends to wear out. Further, each of the upper and lower first upper guide rail parts 83U and second upper guide rail parts 83D, and the lower guide rail part 84 tends to wear out due to contact (sliding contact) with the endless rotating chain 85. . Therefore, in this embodiment, each of the bottom member 87, the first upper guide rail section 83U, the second upper guide rail section 83D, and the lower guide rail section 84 is configured to be replaceable.

An operator can remove the bottom member 87 upward by releasing the bolt connections at the bent portions 87a, 87a, 87b, and 87b of the bottom member 87. That is, the bottom member 87 is configured to be removable upwardly by passing between the left and right endless rotation chains 85, 85.

The conveyor 8 is provided with a cover member 45. As shown in FIG. 21, the lateral inner parts 80a, 80a of the protruding parts of the intermediate frames 80C, 80C (regions of width W1 in the intermediate frames 80C, 80C) and the attachment parts (bent parts 87a, 87a) of the bottom member 87 The lower part of the cover member 45 is interposed between and. The cover member 45 is formed in a shape along the upper part of the protruding part of the intermediate frame 80C (region of the width W1 in the intermediate frame 80C) and the lateral inner side part 80a of the protruding part. It covers the lateral inner side 80a of the section. In this state, the lower part of the cover member 45 and the attachment part of the bottom member 87 are jointly fastened and fixed to the protruding part of the intermediate frame 80C by fastening parts (bolts and nuts).

With this configuration, the intermediate frame 80C and the carrier 86 do not come into sliding contact with each other, and the intermediate frame 80C is prevented from wearing out. The operator can remove the bottom member 87 and the cover member 45 by releasing the bolt connections at the bent portions 87a, 87a, 87b, and 87b of the bottom member 87. Therefore, the cover member 45 is replaceable.

A buffer member 46 is provided at a portion of the transport body 86 that is attached to the endless rotating chain 85, and the buffer member 46 is interposed between the first upper guide rail portion 83U and the transport body 86. The buffer member 46 is in sliding contact with the first upper guide rail portion 83U and suppresses movement of the carrier 86 in the lateral direction. With this configuration, sliding contact between the carrier 86 and the first upper guide rail portion 83U is avoided, the carrier 86 is less likely to wear out, and the durability of the carrier 86 is improved.

[Shape of carrier]
As shown in FIGS. 21 and 22, the carrier 86 includes a pair of left and right side plates 86A, 86A, and a carrier plate 86B. The side plate portions 86A, 86A are welded and fixed to both left and right end portions of the conveyance plate portion 86B. A connecting portion with the endless rotating chain 85 is provided at the vertical center portion of the side plate portion 86A, and the connecting portion of the side plate portion 86A and the endless rotating chain 85 are connected with bolts. That is, a side plate portion 86A serving as a lateral side portion of the carrier 86 is provided with a connecting portion connected to the endless rotation chain 85.

The conveyance plate portion 86B is formed with flat flat surface portions 86h and 86i, a pair of upper and lower recessed portions 86d and 86d, a lower inclined portion 86j, an upper protruding portion 86U, and a lower protruding portion 86L. The recessed portions 86d, 86d are each formed in an upper and lower middle region of the conveyor 86. Each of the recessed portions 86d and 86d is recessed across the left and right sides of the conveying body 86 toward the upper side in the conveying direction of the conveying body 86. The recessed portions 86d, 86d are provided vertically and vertically across the connecting portion with the endless rotating chain 85. Further, the recessed portions 86d, 86d are divided into upper and lower portions with the flat surface portion 86i in between. The flat surface portion 86h is provided above the upper recessed portion 86d. Each of the flat surface portions 86h and 86i has a surface extending from left to right of the transport body 86 and perpendicular to the transport direction. Therefore, the harvested product held and transported by the transport body 86 is firmly subjected to the force in the transport direction from the flat surface portions 86h and 86i.

The lower inclined portion 86j is provided below the recessed portion 86d in the conveying body 86, and is inclined so that the lower side of the conveying body 86 is located on the lower side in the conveying direction. The lower protruding portion 86L is provided below the lower inclined portion 86j. The lower protruding portion 86L is inclined so that the lower side is located on the lower side in the conveying direction across the left and right sides of the conveying body 86. Further, the degree of inclination of the lower protruding portion 86L is greater than the degree of inclination of the lower inclined portion 86j. The lower end portion of the lower protruding portion 86L, that is, the lower end portion of the conveyance plate portion 86B protrudes most downstream in the conveyance direction at the lower part of the conveyance plate portion 86B. With this configuration, the conveying plate portion 86B can securely scoop up the harvested product with the lower protrusion portion 86L and convey it while retaining it.

The upper protrusion 86U is provided at the upper end of the carrier 86, and protrudes across the left and right sides of the carrier 86 toward the lower side in the transportation direction. Further, the upper protruding portion 86U is formed in a mountain-fold shape, and the upper end portion of the conveying plate portion 86B is retracted to the upper side in the conveying direction than the protruding tip portion of the upper protruding portion 86U. In other words, the upper part of the upper protruding part 86U is inclined so that the upper side is located on the upper side in the conveyance direction. With this configuration, the transport plate part 86B holds the harvested product with the upper protrusion 86U, so that the risk of the harvested product climbing over the transport plate part 86B and falling downward is reduced.

With the above configuration, the conveyance plate portion 86B protrudes toward the lower side in the conveyance direction at the upper protrusion 86U and the lower protrusion 86L. Further, a portion of the conveying plate portion 86B between the upper protruding portion 86U and the lower protruding portion 86L is recessed upward in the conveying direction by recessed portions 86d, 86d. As a result, compared to a configuration in which the conveyance plate portion 86B is formed in a flat plate shape, the harvested product enters each of the recessed portions 86d, 86d, and the conveyance body 86 can retain and convey more harvested products.

[Configuration of the upper cover part of the conveyor]
As shown in FIGS. 20, 21, and 23, the conveyor 8 is provided with an upper cover section 88, and the upper cover section 88 covers the conveyance path from above. The upper cover portion 88 extends between a base end portion of the conveyor 8 that rises diagonally upward in the conveyance start end region and a conveyance end region of the conveyor 8 . As shown in FIG. 21, the upper cover portion 88 slopes left and right with the left and right center portions as apexes. In other words, the upper cover portion 88 is configured to bulge upward. Since the conveyance path is covered by the upper cover part 88, the upper cover part 88 prevents the harvest from falling from the conveyor 8. The inclined portion 8A of the conveyor 8 is provided with an upper cover portion 88A, and the connecting portion 8C of the conveyor 8 is provided with an upper cover portion 88C. The upper cover part 88A covers the upper part of the inclined part 8A from above, and the upper cover part 88C covers the upper part of the connecting part 8C from above.

The conveyance path of the bent portion 8B is covered by the upper cover portion 88B. A portion on the upper side in the conveyance direction than the bent portion 8B is covered by an upper cover portion 88A, and a portion on the lower side in the conveyance direction than the bent portion 8B is covered by an upper cover portion 88C. The upper cover portion 88A and the upper cover portion 88C are each made of so-called punching metal and are lightweight. That is, the portions of the upper cover portion 88 that correspond to the inclined portion 8A and the connecting portion 8C are made of a porous member. At the bent portion 8B, the harvested material tends to move violently, and the harvested material is likely to come into contact with the upper cover portion 88B. Therefore, the upper cover portion 88C is made of a member without holes, and the strength of the upper cover portion 88C is increased. That is, the portion of the upper cover portion 88 that corresponds to the bent portion 8B is made of a member without holes.

[Detachable configuration of the bearing of the driven wheel at the conveyance start end of the conveyor]
As shown in FIGS. 9, 25, and 26, the driven wheel body 82 at the conveyance start end of the conveyor 8 is supported by a pair of left and right front walls 80F, 80F via a pair of left and right ball bearings 48, 48. . Based on FIG. 26, the configuration for attaching and detaching the ball bearing 48 will be described in detail. The ball bearing 48 fits inside the bearing housing 47. The bearing housing 47 is formed into a cylindrical shape. A stepped portion is formed in the inner cylinder portion of the bearing housing 47, and the stepped portion receives the ball bearing 48 in the thrust direction. A snap ring 49 is fitted into a portion of the inner cylindrical portion of the bearing housing 47 on the opposite side of the stepped portion with the ball bearing 48 in between. A snap ring 49 is locked to the bearing housing 47 so that the ball bearing 48 does not come off from the bearing housing 47.

The driven wheel body 82 is provided with a shaft body 82A, a pair of left and right sprockets 82B, 82B, an outer fitting cylinder part 82C, a pair of left and right collars 82D, 82D, and a pair of left and right flat washers 82E, 82E. There is. Both ends of the shaft body 82A in the longitudinal direction are formed into a cylindrical shape when viewed in the longitudinal direction, and the cylindrical portion is referred to as a cylindrical portion 82i. That is, cylindrical portions 82i, 82i are formed at both longitudinal ends of the shaft body 82A. Each of the cylindrical portions 82i, 82i fits into a pair of ball bearings 48, 48, respectively. Further, collars 82D, 82D are externally fitted into portions of the cylindrical portions 82i, 82i that are longitudinally inner than the fitting portions for the ball bearings 48, 48.

A screw hole along the longitudinal direction of the shaft body 82A is bored at the end of the cylindrical portions 82i, 82i. Flat washers 82E, 82E are bolted to respective ends of the cylindrical portions 82i, 82i. The flat washer 82E is formed to have a larger diameter than the cylindrical portion 82i. The outer peripheral portion of the flat washer 82E engages with the inner ring of the ball bearing 48. With this configuration, the shaft body 82A is held in position so as not to come off the ball bearing 48.

A portion of the shaft body 82A between the cylindrical portions 82i, 82i is formed in a hexagonal shape when viewed in the longitudinal direction, and this hexagonal portion is referred to as a prismatic portion 82h. A hexagonal fitting hole is bored in the rotation axis of the sprockets 82B, 82B. At both ends of the prismatic portion 82h, the fitting holes of the sprockets 82B, 82B fit into the prismatic portion 82h. Thereby, each of the sprockets 82B, 82B is connected to the shaft body 82A so as to be unable to rotate relative to the shaft body 82A.

Between the left and right sprockets 82B, 82B, an externally fitting cylindrical portion 82C is externally fitted onto the shaft body 82A. Both longitudinal ends of the outer fitting cylinder portion 82C abut on the left and right sprockets 82B, 82B, respectively. The left and right sprockets 82B, 82B are in contact with the collar 82D at both longitudinal ends of the shaft body 82A. That is, the sprocket 82B is sandwiched between the outer fitting cylinder portion 82C and the collar 82D. Further, the collar 82D is sandwiched between the sprocket 82B and the ball bearing 48. With this configuration, the sprocket 82B is held in position relative to the shaft body 82A.

Engagement holes 80i, 80i that engage with the ball bearings 48, 48 are formed in the left and right pair of front walls 80F, 80F, respectively, and the lateral inner ends of the ball bearings 48, 48 are located closer to each other than the engagement holes 80i, 80i. Enter the lateral medial side. Furthermore, the pair of left and right front walls 80F, 80F are provided with projecting surface portions 50, 50, respectively. The protruding surface portions 50, 50 protrude laterally outward from the front side walls 80F, 80F. Ball bearings 48, 48 are bolted to the protruding surface portions 50, 50, respectively.

The replacement of the ball bearing 48 will be explained. The operator releases the bolt of the flat washer 82E from the shaft body 82A. As a result, the flat washer 82E is removed from the shaft body 82A, and the engagement between the shaft body 82A and the ball bearing 48 can be released. Then, the operator releases the bolts of the bearing housing 47 from the protruding surface portion 50 and pulls the bearing housing 47 laterally outward. As a result, the bearing housing 47 is removed from the front wall 80F, and the ball bearing 48 is removed from the cylindrical portion 82i of the shaft body 82A. The cylindrical portion 82i that has been disengaged from the ball bearing 48 is received at the bottom of the engagement hole 80i, thereby preventing the shaft body 82A from falling off.

The diameter of the engagement hole 80i is larger than the diameter of the shaft body 82A, and larger than the diameter of the collar 82D. Therefore, the operator can replace the collar 82D at the engagement hole 80i. Note that the diameter of the engagement hole 80i is smaller than the outer diameter of the sprocket 82B. Therefore, when the operator replaces the sprocket 82B, the operator releases the bolt connection of the front wall 80F on the left side of the machine body and removes the front wall 80F on the left side of the machine body from the conveyor 8. This allows the operator to replace the sprocket 82B.

[Pin removal structure at the turning fulcrum of the conveyor]
Based on FIGS. 27 and 28, a pin 35 is inserted as a turning fulcrum of the conveyor 8. However, if the sugarcane harvester is used for a long period of time, the pin 35 will become stuck to the conveyor support frame 20 or the revolving frame 21, and the pin 35 will come off from the conveyor support frame 20 and the revolving frame 21. There is a risk that it will disappear. In order to avoid such inconvenience, in this embodiment, the pin 35 is provided with a detachable portion 37. The pin 35 and the detachable portion 37 are integrally constructed.

As shown in FIG. 28, a pair of upper and lower pins 35, 35 are provided, and a detachable portion 37 is provided on each of the pins 35, 35. The upper pin 35 is inserted through the upper plate portion 20A and a pair of upper and lower upper plate portions 21A and 21B. The lower pin 35 is inserted through the lower plate portion 20B and a pair of upper and lower lower plate portions 21C and 21D. A detachable portion 37 corresponding to the upper pin 35 is provided at the upper end of the upper pin 35, and a detachable portion 37 corresponding to the lower pin 35 is provided at the lower end of the lower pin 35.

Bolt insertion holes 37h, 37h are bored in the upper and lower detachable parts 37, 37, respectively, and screw holes 21h, 21h corresponding to the bolt insertion holes 37h, 37h are bored in the upper plate part 21A and the lower plate part 21D, respectively. ing. With the bolt insertion hole 37h and the screw hole 21h overlapping, the bolt Bo1 is inserted through the bolt insertion hole 37h and fastened to the screw hole 21h. Thereby, the pin 35 and the detachable part 37 are fixed to the rotating frame body 21 so as not to be relatively rotatable.

Screw holes 37i, 37i are bored in the upper and lower attachment/detachment parts 37, 37, respectively. The screw hole 37i has the same diameter as the screw hole 21h. When an operator removes the pin 35 from the conveyor support frame 20 and the swing frame 21, the operator first removes the snap ring wrapped around the pin 35. Next, the operator pulls out the bolt Bo1 from the bolt insertion hole 37h and the screw hole 21h, and then tightens the bolt Bo1 into the screw hole 37i. When the screw hole 37i is threaded, the threaded tip of the bolt Bo1 presses the surface of the upper plate portion 21A or the lower plate portion 21D. As the bolt Bo1 is pressed, a reaction force is generated from the upper plate portion 21A or the lower plate portion 21D. At this time, an upward reaction force acts on the upper pin 35, and a downward reaction force acts on the lower pin 35. Even if the pin 35 is fixed to the rotating frame body 21, the pin 35 is displaced with respect to the rotating frame body 21 due to the reaction force generated as the bolt Bo1 spirals. Thereby, the operator can pull out the pin 35 from the conveyor support frame body 20 and the swing frame body 21.

As shown in FIGS. 27 and 28, the pins 36, 36 are connected to the tips of the piston rods of the swing hydraulic cylinders 22, 22. The attachment/detachment part 38 is provided at the lower end of each of the pins 36, 36. The pin 36 is inserted through the upper plate portion 21B and the lower plate portion 21C. An opening 21i is formed in the lower plate portion 21D, and the operator can work on the pin 36 and the detachable portion 38 from below through the opening 21i.

Bolt insertion holes 38h, 38h are bored in the attachment/detachment parts 38, 38, respectively, and screw holes corresponding to the bolt insertion holes 38h, 38h are bored in the lower plate part 21C. The bolt Bo2 is inserted into the bolt insertion hole 38h and fastened with the bolt insertion hole 38h and the screw hole of the lower plate portion 21C overlapping each other. Thereby, the pin 36 and the attachment/detachment part 38 are fixed to the rotating frame body 21 so that they cannot rotate relative to each other.

Screw holes 38i, 38i are bored in the upper and lower attachment/detachment parts 38, 38, respectively. The screw hole 38i has the same diameter as the screw hole of the lower plate portion 21C. When the operator pulls out the pin 36 from the upper plate part 21B and the lower plate part 21C, the operator pulls out the bolt Bo2 from the bolt insertion hole 38h and the screw hole of the lower plate part 21C, and then inserts the bolt Bo2 into the screw hole 38i. tighten. When the screw hole 38i screws forward, the screw tip of the bolt Bo2 presses the surface of the lower plate portion 21C. As the bolt Bo2 is pressed, a reaction force from the lower plate portion 21C acts downward on the pin 36. Even if the pin 36 is fixed to the upper plate part 21B and the lower plate part 21C, the pin 36 is fixed to the upper plate part 21B and the lower plate part 21C due to the reaction force generated with the screwing of the bolt Bo2. Displaced against. Thereby, the operator can pull out the pin 36 from the upper plate part 21B and the lower plate part 21C. In this way, the attachment/detachment part 37 and the attachment/detachment part 38 have the same structure for attaching and detaching the pins 35 and 36, respectively.

[Another embodiment]
The present invention is not limited to the configurations illustrated in the above-described embodiments, and other representative embodiments of the present invention will be illustrated below.

(1) In the above-described embodiment, the branch portion 34 is connected to the pair of swing hydraulic cylinders 22, 22 by two branch pipes 30A, 30A, but the present invention is not limited to this embodiment. For example, the branch portion 34 may be connected to three or more swing hydraulic cylinders 22 by three or more branch pipes 30A. That is, any configuration may be used as long as it includes a plurality of hydraulic pipes 30 and a plurality of branch parts 34 corresponding to the plurality of hydraulic pipes 30. It is sufficient that the branch portion 34 is connected to the storage tank 31 as a hydraulic pressure source through one main pipe 30B, and branches into a plurality of branches toward each of the plurality of swing hydraulic cylinders 22.

(2) In the above-described embodiment, the support member 15A is supported by the horizontal frame portion 15D, and the pair of upper and lower branch portions 34, 34 are supported by the support member 15A, but the present invention is not limited to this embodiment. For example, the support member 15A may be supported by the front end of the conveyor support frame body 20, and the pair of upper and lower branch portions 34, 34 may be supported by the support member 15A. That is, any configuration may be used as long as the branch portion 34 is provided in a portion of the hydraulic piping 30 on the front side of the machine body with respect to the vertical axis X1.

(3) In the above-described embodiment, the branching parts 34, 34 are arranged vertically, but the branching parts 34, 34 are not arranged vertically, but are configured to swing around different axes. Also good.

(4) In the above embodiment, one of the branch parts 34, 34 corresponding to the extension pipe is the extension branch part, and the other corresponding to the contraction pipe is the contraction branch part. It is not limited to the embodiment. For example, a configuration may be adopted in which only one of the extension branch section and the contraction branch section is provided.

(5) The storage tank 31 and the pump unit 32 are provided so as to be biased to the left side of the vehicle with respect to the center of the traveling vehicle in the left-right direction of the vehicle, but the present invention is not limited to this embodiment. For example, the storage tank 31 and the pump unit 32 may be provided so as to be offset to the right side of the traveling aircraft with respect to the center in the left-right direction of the traveling aircraft. That is, the storage tank 31 and the pump unit 32 may be provided in a state where they are offset to one side of the left and right sides of the machine body with respect to the center in the left-right direction of the machine body.

(6) Although the main pipe 30B and the branch portion 34 are provided in a state where they are offset to the left side of the body with respect to the center in the left-right direction of the body, the present invention is not limited to this embodiment. For example, the main pipe 30B and the branch part 34 may be provided in a state where they are offset to the right side of the machine body with respect to the center in the left-right direction of the machine body, or they may be provided in a state where they are located between the swing hydraulic cylinders 22, 22 in the left-right direction. It's okay.

Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments as long as no contradiction occurs. Further, the embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the purpose of the present invention.

The present invention is applicable to sugarcane harvesters.

4: Reaping section (reaping conveyance device)
6: Conveyance device (reaping conveyance device)
7: Separation device 8: Conveyor 22: Swinging hydraulic cylinder (multiple hydraulic cylinders)
30: Hydraulic piping 30A: Branch piping (extension piping, contraction piping)
30B: Main piping 31: Storage tank (hydraulic source)
32: Pump unit 34: Branch part (branch part for extension, branch part for contraction)
54: Round bar member (guide part)
55: Round bar member (guide part)
56: Round bar member (guide part)
58: Conveyor hydraulic piping (separate hydraulic piping)
X1: Vertical axis (first axis)
X3: Axis core (second axis core)

Claims (7)

a traveling machine body having a reaping and transporting device that reaps crops in a field and transports them rearward;
a separation device that is provided at the rear of the traveling machine and separates the crop into foreign matter and harvested material;
The machine is connected to the rear part of the traveling machine in a state in which it can rotate around a vertically directed first axis using its lower end as a fulcrum, and receives the harvested material from the separating device and conveys it diagonally upward to the machine. A conveyor that discharges to the outside,
a plurality of hydraulic cylinders connected to the rear part of the traveling body and the conveyor in a state where they are distributed left and right with respect to the first axis, and drive the conveyor to swing left and right;
a hydraulic pipe connected to a hydraulic power source and capable of supplying and discharging hydraulic oil to each of the plurality of hydraulic cylinders;
The hydraulic piping is provided with one main pipe and a branch part, the main pipe is connected to the hydraulic pressure source, and the branch part is connected to the main pipe in the hydraulic pipe on the front side of the aircraft body with respect to the first axis. This piping is branched into a plurality of parts corresponding to each of the plurality of hydraulic cylinders,
In the sugarcane harvester, the branching section is configured to be swingable about a second vertical axis following the rotation of the conveyor. A plurality of the hydraulic pipes and a plurality of branch parts corresponding to the plurality of hydraulic pipes are provided,
The sugarcane harvester according to claim 1, wherein the plurality of branch parts are arranged vertically and are configured to be swingable around the one second axis. The plurality of hydraulic cylinders are configured to be double acting,
The plurality of hydraulic pipes include an extension pipe for supplying and discharging the hydraulic oil to and from the extension oil chambers in the plurality of hydraulic cylinders, and a contraction pipe for supplying and discharging the hydraulic oil to and from the contraction oil chambers in the plurality of hydraulic cylinders. It is equipped with piping and
The plurality of branch parts include an extension branch part that branches the extension pipe corresponding to the extension oil chamber in the plurality of hydraulic cylinders, and an extension branch part that branches the extension pipe corresponding to the extension oil chamber in the plurality of hydraulic cylinders; 3. The sugarcane harvesting machine according to claim 2, further comprising a contraction branch that branches in correspondence with the chamber. The sugarcane harvester according to any one of claims 1 to 3, wherein the second axis is set at a location in front of the plurality of hydraulic cylinders. The sugarcane harvester according to any one of claims 1 to 4, wherein the second axis is set at a position on an extension of the main piping at the branch portion in plan view. A storage tank for storing the hydraulic oil is provided as the hydraulic pressure source,
A pump unit is provided that pumps the hydraulic oil from the storage tank to each of the plurality of hydraulic cylinders via the hydraulic piping,
The pump unit is provided in a state where it is biased to one side of the vehicle left and right with respect to the center of the traveling vehicle in the vehicle left and right direction,
The sugarcane harvester according to any one of claims 1 to 5, wherein the main pipe and the branch section are provided in a state where they are offset to one side of the machine body in the left-right direction with respect to the center in the left-right direction of the machine body. Another hydraulic piping is provided for supplying and discharging the hydraulic oil from the hydraulic source to and from a portion of the conveyor on the rear side of the hydraulic cylinder,
A guide portion is provided at a connection point between the rear part of the traveling machine and the conveyor to prevent the other hydraulic pipe from falling into a gap between the rear part of the traveling machine and the front part of the conveyor. The sugarcane harvesting machine according to any one of Items 1 to 6.

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