JP2019187290A - Harvester - Google Patents

Abstract

To provide a harvester capable of preventing breakage of a harvesting part, when being constituted so that a reaping part is supported at a set height from a field by a grounding part provided on the harvesting part.SOLUTION: A harvester includes a grounding part 16 provided on a harvesting part 2, for supporting the harvesting part 2 at a set height from a field by grounding on the field, and a sinking sensor 23 for detecting that the grounding part 16 sinks into the field. The harvester further includes a lifting operation part 73 for lifting the harvesting part 2, when detecting by the sinking sensor 23 that the grounding part 16 sinks into the field.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a harvester that harvests crops in a field while traveling.

In a rice combine that is an example of a harvesting machine, as disclosed in Patent Document 1, a harvesting part (corresponding to a harvesting part) that harvests crops in the field as the machine advances is located at the front of the machine. Some are supported so as to be able to move up and down, and are provided with a warped grounding portion at the lower part of the cutting portion.
As a result, the cutting unit is supported at a set height from the field by the grounding unit contacting the field, and the cutting unit moves up and down with respect to the body along the field as the aircraft advances. It becomes.

JP-A-2005-34051 Japanese Patent Laid-Open No. 2015-23852

As in Patent Document 1, if the harvesting part is supported by the field by the grounding part, for example, if there is a small concave part in the field, or if there is a part that is soft, depending on the concave part or the soft part of the field, The grounding part may sink into the field.
When the grounding part sinks into the field, the harvesting part also descends and enters the field, and the harvesting part may be damaged.

  According to the present invention, in the harvesting machine, the harvesting unit is supported at a set height from the field by a grounding unit provided in the harvesting unit, and the harvesting unit moves up and down with respect to the machine so that the harvesting machine follows the field as the machine advances. The purpose of this is to prevent damage to the harvesting section.

The harvesting machine of the present invention is
A harvesting unit that is supported by the aircraft so as to be movable up and down, and that harvests crops in the field as the aircraft advances,
A grounding unit provided in the harvesting unit, which contacts the field and supports the harvesting unit at a set height from the field;
A subduction sensor for detecting that the grounding unit has submerged in the field;
And a raising operation unit that raises the harvesting unit when the submergence sensor detects that the ground contact unit has submerged in the field.

According to the present invention, the harvesting unit is supported at a set height from the field by the grounding unit provided in the harvesting unit, and in the state where the harvesting unit moves up and down with respect to the aircraft along the field as the aircraft advances, When the section sinks into the farm field, the sinking sensor detects that the ground contact section sank into the farm field, and the harvesting section is raised.
Thereby, the state where the harvesting part enters the field can be avoided, and damage to the harvesting part can be prevented.

In the present invention,
The ascending operation part is
After the lifting operation of the harvesting unit based on the detection of the subduction sensor, when the preset time has elapsed, the grounding unit returns to the state in which the harvesting unit is supported from the field to the set height. It is preferable.

The state in which the ground contact part sinks into the field due to a small recess or a partially soft part of the field is often temporary.
In this state, according to the present invention, when the harvesting unit is lifted by sinking into the field, when the set time elapses, the original state (the grounding unit brings the harvesting unit from the field to the set height). Return to the state of support.

  As a result, after the harvesting part is lifted by the grounding part sinking into the field, the harvesting part is not maintained in a state where the harvesting part is lifted longer than necessary. The poor harvest can be kept small.

In the present invention,
The harvesting section is
A pick-up device that is provided at the front of the aircraft and picks up and harvests crops in the field as the aircraft advances;
A picking device that is supported on the front portion of the picking device so as to swing up and down and extends to the front side, touches the crop from the upper side of the field, and handles the crop to the picking device side;
The grounding portion is provided at a front portion of the scraping device, and supports the scraping device at a set height from a field.
The raising operation unit is preferably operated to raise the scraping device when the subtraction sensor detects that the grounding unit has submerged in the field.

As disclosed in Patent Document 2, there is a harvester that picks up and harvests crops (onions, potatoes, etc.) in the field, as disclosed in Patent Document 2, for rice combine as in Patent Document 1.
In a harvesting machine such as Patent Document 2, a picking device that picks up and harvests crops in the field as the aircraft advances, and a picking device that touches the crops from the upper side of the field and picks up the crops. Some have a scraping device to handle on the side.

According to the present invention, in the harvesting section provided with the pick-up device and the pick-up device, the pick-up device is supported by the front portion of the pick-up device so as to be swingable up and down, and extended to the front side, and the grounding portion is picked-up device The scraping device is supported at a set height from the field.
When it is detected by the sink sensor that the ground contact section has sunk into the field, the scraping device is lifted to avoid a state in which the scraping device enters the field. Since the pickup device is supported by the machine body, the pickup device does not enter the field.

  According to the present invention, not all the weight of the harvesting part is supported by the field via the grounding body, but the picking device for the harvesting part is supported by the machine, and the scraping device for the harvesting part is supported by the fielding part. Since the weight applied to the grounding portion does not become large, the frequency with which the grounding portion sinks into the field can be reduced.

  When the sinking sensor detects that the grounding part has submerged in the field, the harvesting part's scraping device is operated to raise rather than the entire harvesting part's raising operation. It is not necessary to use a large amount of power for the ascending operation, and the ascending operation of the scraping device in the harvesting section is performed without delay.

In the present invention,
The grounding portion is provided on the right and left outer portions of the crop introduction portion at the front of the scraping device,
It is preferable that the subsidence sensor is provided on a lateral outer side opposite to the crop introduction part in a plan view in at least one of the right and left grounding parts.

  As described above, in the harvesting section provided with the picking device and the scraping device, according to the present invention, the grounding portion is provided on the right and left outer portions of the crop introduction portion at the front of the scraping device. Therefore, the scraping device is stably supported by the right and left grounding portions, and the right and left grounding portions do not hinder crop scraping by the scraping device.

  According to the present invention, since the subduction sensor is provided on the lateral outer side opposite to the crop introduction part of the scraping device in plan view with respect to the grounding portion, the subduction sensor is scraped of the crop by the scraping device. There is no hindrance. In addition to this, it is possible to avoid a situation in which the subduction sensor makes a false detection due to the subduction sensor and the crop.

According to the present invention,
It is preferable that the subsidence sensor is disposed above the lower end of the grounding unit in a side view and detects that the grounding unit sank into the field by contacting the field.

  According to the present invention, when the subduction sensor is configured as a contact type that detects contact with the field, the grounding unit is placed on the field by placing the subtraction sensor above the lower end of the grounding unit in a side view. Since the sinking sensor comes into contact with the field by sinking, it is possible to accurately detect that the ground contact part has sinked into the field.

  When the grounding unit is in contact with the field, the soil of the field is scraped and jumped up by the grounding unit, so if the sinking sensor is placed at a low position near the lower end of the grounding unit, If the ground splashed from the field contacts the sinking sensor and the grounding part sinks into the field, the sinking sensor may erroneously detect.

  According to the present invention, since the subduction sensor is disposed above the lower end of the grounding portion in a side view, the possibility that the soil that has jumped up from the field will contact the subduction sensor is reduced. Sensor false detection is reduced.

In the present invention,
The grounding portion is a grounding ring that is rotatable around a horizontal axis.
It is preferable that the sink sensor is disposed above the lower end portion of the grounding wheel and below the upper end portion of the grounding wheel in a side view.

  According to the present invention, when the grounding portion is a grounding wheel, the sinking sensor is placed on the field by placing the sinking sensor above the lower end of the grounding wheel in a side view. Since the contact is made, it is possible to accurately detect that the ground ring has submerged in the field.

  Further, according to the present invention, by arranging the sink sensor below the upper end of the ground ring in a side view, the sink sensor comes into contact with the field before the ground ring largely sinks into the field. The raising operation of the (scraping device) is performed without delay.

In the present invention,
A cover for covering the front side of the ground ring is provided;
It is preferable that the sink sensor is provided on the cover.

According to the present invention, it is possible to reduce adhesion of soil, debris, and the like in the field to the grounding wheel, and it is possible to ensure stable rotation of the grounding wheel.
According to the present invention, by supporting the sink sensor on the cover, the cover can be used also as a support member for the sink sensor, and the support structure of the sink sensor can be simplified.

In the present invention,
It is preferable that the sink sensor is disposed in front of the rotating shaft of the grounding wheel and rearward of the front end of the grounding wheel in a side view.

  According to the present invention, when the grounding wheel sinks into the field as the aircraft moves forward, the sinking sensor comes into contact with the field without being too early or too late. Done properly.

In the present invention,
A cover for covering the front side of the ground ring is provided;
It is preferable that the sinking sensor is disposed on the front side of the rotating shaft of the grounding wheel and on the rear side of the front end portion of the cover in a side view.

According to the present invention, it is possible to reduce adhesion of soil, debris, and the like in the field to the grounding wheel, and it is possible to ensure stable rotation of the grounding wheel.
According to the present invention, by supporting the sink sensor on the cover, the cover can be used also as a support member for the sink sensor, and the support structure of the sink sensor can be simplified.

  According to the present invention, when the grounding wheel sinks into the field as the aircraft moves forward, the sinking sensor comes into contact with the field without being too early or too late. Done properly.

It is a right view of a harvester. It is a top view of a harvester. It is a right view of a harvesting part. It is a figure which shows the cooperation state of a control apparatus and a harvesting part. It is a top view of the vicinity of the right grounding ring and the subduction sensor. It is a right view of the vicinity of the right grounding wheel and the subduction sensor. It is a front view of the vicinity of a right grounding ring and a subduction sensor. It is a rear view of the vicinity of the right grounding wheel and the subduction sensor. It is a figure which shows the cooperation state of a control apparatus, a dispersion | distribution part, and a collection | recovery part. It is a figure which shows the flow in the floating state of the rake device in a harvesting operation. It is a figure which shows the flow of the raising operation of the stirring device in a floating state. It is a right view of the vicinity of the collection unit showing the flow of work at the start of harvesting work. It is a right view of the vicinity of the collection unit showing the flow of work at the start of harvesting work. It is a right view of the vicinity of the collection | recovery part which shows the flow of the first half of a harvesting operation | work. It is a right view of the vicinity of the collection | recovery part which shows the flow of the middle half of a harvesting operation | work. It is a right view of the vicinity of the collection | recovery part which shows the flow of the latter half of a harvesting operation | work. It is a right view of the vicinity of the collection | recovery part which shows the flow of completion | finish of a harvesting operation | work. It is a right view of the vicinity of the collection | recovery part which shows the flow of replacement | exchange work of a collection container. It is a right view of the vicinity of the collection | recovery part which shows the flow of replacement | exchange work of a collection container. It is a right view of the vicinity of the collection | recovery part which shows the flow of replacement | exchange work of a collection container.

1 to 20 show an onion harvester that is an example of a harvester.
In the harvest of onion A (corresponding to a crop), a digging machine (not shown) digs up the onion A buried in the field G and places it in the position where the onion A is dug. Leave in G for several days to dry. The harvesting machine of the present invention picks up and harvests the onion A placed in the field G after the completion of drying.

  1 to 20, F indicates “forward direction”, B indicates “rearward direction”, U indicates “upward direction”, and D indicates “downward direction”. R indicates “right direction”, and L indicates “left direction”.

(Overall configuration of harvester)
As shown in FIGS. 1 and 2, the aircraft 10 is supported by the right and left crawler type traveling devices 1, the harvesting unit 2 is supported at the front of the aircraft 10, and the rear of the harvesting unit 2. The transport unit 3 and the dispersion unit 4 are supported by the machine body 10, and the collection unit 5 is supported by the rear part of the machine body 10.
A driving unit 6 is provided on the right front of the machine body 10, and a work deck 7 is provided on the right and left sides of the transport unit 3.

  As the machine body 10 advances, the onion A in the field G is picked up by the harvesting unit 2, and the onion A is lifted upward by the harvesting unit 2 and delivered to the transport unit 3. The onion A is transported to the rear side by the transport unit 3, and is introduced into the recovery unit 5 from the terminal end 3 a of the transport unit 3 through the dispersion unit 4 and recovered.

(Configuration of pick-up device in the harvesting section)
As shown in FIGS. 1, 2, and 3, the harvesting unit 2 is provided with a pickup device 8 and a scraping device 9.

  A support arm 29 is supported so as to be swingable up and down around the left and right axis P6 at the top of the front part of the machine body 10, and a support arm 30 around the left and right axis P7 at the lower part of the front part of the machine body 10. Is swingably supported.

  The upper part of the pick-up device 8 is swingably connected to the front end of the support arm 29. The support arm 31 is connected to the support arm 30 and extends to the front side, and the lower part of the pickup device 8 is swingably connected to the front end portion of the support arm 31. A hydraulic cylinder 32 is connected across the lower portion of the front portion of the body 10 and the support arm 30.

  The pick-up device 8 is disposed along the vertical direction at the front of the machine body 10, the lower end of the pick-up device 8 is disposed at a position that is substantially in contact with the field G, and the upper end of the pick-up device 8 is the starting end of the transport unit 3. It is arrange | positioned above the part.

  When the hydraulic cylinder 32 is extended, the pick-up device 8 is lifted by the support arms 29, 30, 31. When the hydraulic cylinder 32 is contracted, the pickup device 8 is lowered by the support arms 29, 30, and 31.

  In the pick-up device 8, a wide endless rotating body 11 having a lateral width close to the left-right width of the airframe 10 is extended over the lower end and the upper end of the pick-up device 8, and a number of pick-up members 12 are provided. The rotating body 11 is connected.

  When the rotator 11 is driven to rotate counterclockwise in FIG. 1, the onion A of the farm field G is picked up by the pick-up member 12 at the lower end of the pick-up device 8 and lifted upward along the rotator 11. Then, it is transferred from the upper end of the pick-up device 8 to the start end of the transport unit 3.

(Configuration of the scraping device in the harvesting section)
As shown in FIGS. 1, 2, and 3, the scraping device 9 is supported so as to be swingable up and down around the axis P <b> 1 in the left and right direction at the lower end portion of the picking device 8. A hydraulic cylinder 13 to be operated is connected across the pick-up device 8 and the scraping device 9.

  In the scraping device 9, the right and left rotating chains 14 are arranged at substantially the same left / right distance as the left / right width of the picking device 8, and a number of scraping members 15 made of rubber plates are attached to the right and left rotating chains 14. Connected. The right and left grounding rings 16 (corresponding to the grounding part) are supported on the right and left outer parts of the crop introduction part 9a in the front part of the scraping device 9.

  In the field G, the machine body 10 is moved forward with the ground ring 16 positioned on the right side and the left side of the portion (rice cake) where the onion A is placed. In a state where 9a) is supported at a set height from the field G, the rotary chain 14 is driven to rotate clockwise in FIG.

  As a result, the onion A is scraped to the rear side (the pickup device 8 side) while the scraping member 15 contacts the onion A introduced into the crop introduction part 9a of the scraping device 9 from the upper side of the field G. Thus, the picking up of the onion A from the lower end of the picking up device 8 (the picking up member 12) is assisted.

(Support structure for grounding ring of scraping device)
As shown in FIGS. 1, 2, 3, and 4, the right and left support frames 20 are swingable up and down around the axis P2 in the left-right direction on the right and left lateral portions 9b of the scraping device 9. The frame 25 is connected to the front portion of the support frame 20 in the left-right direction. The right and left grounding wheels 16 are supported at the front ends of the right and left support frames 20.

  Right and left operation arms 26 are provided at the front portions of the right and left support frames 20, and a support shaft 43 is connected across the right and left operation arms 26. The right and left operation arms 26 are supported so as to swing together around the axis P3 in the left-right direction of the support shaft 43.

  The right and left linkage rods 27 are connected across the right and left lateral sides 9b of the scraping device 9 and the upper portions of the right and left operation arms 26, and the right support frame 20 and the right operation arm are connected. A hydraulic cylinder 28 is connected to the lower part of the hydraulic cylinder 26.

  When the hydraulic cylinder 28 is contracted while the grounding wheel 16 is in contact with the field G in a floating state, which will be described later, the scraping device 9 is lifted around the axis P1 via the operation arm 26 and the linkage rod 27. Thus, the position of the crop introduction part 9a of the scraping device 9 is increased.

  When the hydraulic cylinder 28 is extended while the grounding wheel 16 is in contact with the field G in a floating state, which will be described later, the scraping device 9 is lowered around the axis P1 via the operation arm 26 and the linkage rod 27. Thus, the position of the crop introduction part 9a of the scraping device 9 is lowered.

(Configuration of grounding ring of scraping device)
As shown in FIGS. 1, 2, 3 and 4, a box-shaped cover 21 formed by bending a plate material is provided. As shown in FIGS. 5, 6, 7, and 8, the cover 21 includes a front side portion 21 a, right and left lateral side portions 21 b, and an upper side portion 21 c, and the lower side and the rear side are open, and the upper side portion A fulcrum shaft 21d is connected upward to 21c.

As shown in FIGS. 2, 3, and 4, a fulcrum shaft 21 d of the cover 21 is rotatably supported around the vertical axis P <b> 4 of the front end portion of the support frame 20.
As shown in FIGS. 5, 6, 7, and 8, the grounding ring 16 is freely rotatably supported around the axis P <b> 5 (corresponding to the rotation axis) in the left and right direction of the lateral side portion 21 b of the cover 21. The shaft core P5 is located on the rear side of the fulcrum shaft 21d (shaft core P4) of the cover 21 in a side view and a plan view.

A flexible cover 22 made of rubber plate or the like is attached across the front surface of the front side portion 21a of the cover 21 and the outer surfaces of the right and left lateral side portions 21b.
The rear end portion of the lateral side portion 22a outside the cover 22 (opposite to the crop introduction portion 9a of the scraping device 9) is outside the cover 21 (the crop introduction portion 9a of the scraping device 9) in a plan view and a side view. And the rear end portion of the lateral side portion 21b on the opposite side).

  The rear end portion of the lateral side portion 22b on the inner side of the cover 22 (on the crop introduction unit 9a side of the scraping device 9) is the inner side of the cover 21 (on the crop introduction portion 9a side of the scraping device 9) in plan view and side view. It extends beyond the rear end portion of the lateral side portion 21b to the rear side, and is disposed on the rear side of the rear end portion 16c of the ground ring 16.

The lower end portions of the cover 21 (the front side portion 21a and the lateral side portion 21b) are disposed at an intermediate position between the lower end portion 16a (grounding portion portion) of the grounding wheel 16 and the shaft core P5 in a side view.
The lower end portion of the cover 22 (lateral side portions 22a, 22b) is disposed below the lower end portion of the cover 21 (front side portion 21a and lateral side portion 21b) in a side view, and the lower end portion 16a of the grounding wheel 16 is disposed. Are arranged at substantially the same position.
With the above configuration, the covers 21 and 22 cover the front side, the right side, and the left side of the ground ring 16.

(Configuration of subduction sensor)
As shown in FIGS. 5, 6, 7, and 8, the grounding wheel 16 is provided with a sinking sensor 23 that detects that the grounding wheel 16 has sinked into the field G.

  The sinking sensor 23 includes a main body portion 23a in which a potentiometer or the like is housed, and a contact portion 23b that extends downward from the main body portion 23a and is supported by the main body portion 23a so as to be swingable up and down.

  The sink sensor 23 is provided on the cover 21 via the cover 24. The cover 24 is formed in a box shape by bending a plate material, and includes a front side portion 24a, a lateral side portion 24b, an upper side portion 24c, and a mounting portion 24d, and the lower side and the rear side are open.

  A body portion 23 a of the sink sensor 23 is attached to the inner surface of the lateral side portion 24 b of the cover 24, and an attachment portion 24 d of the cover 24 is bolted to the lateral side portion 21 b of the cover 21.

  As shown in FIGS. 1, 2, 3, and 4, in the right ground ring 16, the cover 24 (sinks) on the lateral side 21 b on the right side of the cover 21 (opposite to the crop introduction part 9 a of the scraping device 9). A sensor 23) is attached. In the left ground ring 16, a cover 24 (sink sensor 23) is attached to the side part 21 b on the left side of the cover 21 (opposite to the crop introduction part 9 a of the scraping device 9) (sink sensor 23. Is equivalent to a state in which the grounding wheel 16 (grounding part) is provided on the lateral outer side opposite to the crop introduction part 9a in plan view).

(Positional relationship between subduction sensor and each part)
As shown in FIGS. 5, 6, 7, and 8, the contact portion 23 b of the sinking sensor 23 protrudes downward from the lower end portion of the cover 24 (lateral side portion 24 b) in a side view. The sinking sensor 23 (contact portion 23b) is disposed above the lower end portion 16a of the ground ring 16 in a side view.

  A long hole 24e along the vertical direction is opened in the mounting portion 24d of the cover 24, and the mounting portion 24d of the cover 24 is bolted to the lateral side portion 21b of the cover 21 through the long hole 24e. Thereby, the connection position of the cover 24 (sink sensor 23) can be adjusted up and down along the long hole 24e of the cover 24.

  The state shown in FIGS. 6, 7, and 8 is a state in which the connecting position of the cover 24 (sink sensor 23) is the highest position. In this state, the lower end portion of the contact portion 23 b of the sink sensor 23 is viewed from the side. Thus, it is located at substantially the same position (or slightly above) as the axis P5 (the rotation axis of the ground ring 16).

  By changing the connecting position of the cover 24 (sink sensor 23) downward from the state shown in FIGS. 6, 7, and 8, the lower end portion of the contact part 23b of the sink sensor 23 is shown in the side view as the axis P5. It can be disposed between the (rotating shaft of the ground ring 16) and the lower end portion 16 a of the ground ring 16.

  The sinking sensor 23 (contact portion 23b) is disposed on the front side of the shaft core P5 of the grounding wheel 16 (the rotating shaft of the grounding wheel 16) in a side view, and is disposed on the rear side of the front end 16d of the grounding wheel 16. ing.

  The sinking sensor 23 (contact portion 23b) is disposed on the front side of the shaft core P5 (the rotating shaft of the grounding wheel 16) in a side view, and is disposed on the rear side of the front end portion of the cover 21 (front side portion 21a). Yes.

(Conveyor configuration)
As shown in FIGS. 1 and 2, the transport unit 3 is provided with a first transport device 17 on the front side and a second transport device 18 on the rear side.

The 1st conveyance apparatus 17 is provided in the lower side of the upper end part of the picking-up apparatus 8 with the left-right width substantially the same as the left-right width of the picking-up apparatus 8, and is arrange | positioned diagonally forward upward in the side view.
The second transport device 18 has a lateral width that is substantially the same as the lateral width of the first transport device 17 and the pick-up device 8, and is disposed on the rear side of the first transport device 17, and is disposed obliquely rearward and upward in a side view. Has been.

  An arch-shaped (channel-shaped) frame 19 is provided in a front view, the right leg of the frame 19 is connected to the right lateral side of the second transport device 18, and the left lateral side of the second transport device 18. The left leg portion of the frame 19 is connected to the portion.

  The onion A of the field G is picked up by the pick-up device 8 and lifted upward, and the onion A is transferred from the upper end of the pick-up device 8 to the first transport device 17 (starting end portion of the transport unit 3). Is conveyed to the rear side by the first conveying device 17, transferred to the second conveying device 18, and conveyed to the rear side by the second conveying device 18.

  In addition to the driver of the driving unit 6, auxiliary workers are standing on the right and left work decks 7. The auxiliary worker takes out the defective onion A from the onion A conveyed through the second conveying device 18 (conveying unit 3), or the onion A stays in the second conveying device 18 (conveying unit 3). Then, the onion A stays up. In this case, the auxiliary worker can stabilize the body by holding the frame 19.

  The onion A is transported rearward by the second transport device 18, falls from the terminal end of the second transport device 18 (the terminal end 3 a of the transport unit 3), hits the dispersion unit 4, and moves from the dispersion unit 4 to the recovery unit 5. It is thrown in and collected.

(Configuration of the distribution unit)
As shown in FIGS. 1, 2, and 9, the dispersion unit 4 is provided below the terminal portion of the second transport device 18 (the terminal portion 3 a of the transport unit 3). The dispersion unit 4 includes an operation position B1 (see FIG. 2) below the terminal portion of the second transport device 18 (terminal portion 3a of the transport unit 3) and a non-operation position B2 that is separated from the operation position B1 (FIG. 1). (See)).

  As shown in FIGS. 2 and 9, the dispersing unit 4 disperses the onion A that has come out from the terminal end of the second transport device 18 (the terminal end 3 a of the transport unit 3) at the working position B <b> 1, so that the onion A is It is arranged so that it is evenly charged into each part of the collection unit 5.

  As shown in FIG. 9, an operation arm 39 and a support arm 41 are swingably supported around the left and right axial cores P <b> 10 and P <b> 11 of the rear portion of the machine body 10, and a support member 38 is connected to the dispersion portion 4. ing.

  A return-type hydraulic pressure that swings the operation arm 39 by connecting the upper end of the operation arm 39 to the rear end of the support member 38 and connecting the upper end of the support arm 41 to the front and rear intermediate portion of the support member 38. A cylinder 40 is provided. A crop sensor 37 is attached to the rear end of the dispersion unit 4.

  In the state shown by the chain line in FIG. 9, the hydraulic cylinder 40 is contracted, and the dispersing unit 4 is located at the lower working position B1 of the second transport device 18 (the terminal unit 3a of the transport unit 3). It is in a state.

  When the hydraulic cylinder 40 is extended from the state shown by the chain line in FIG. 9, the dispersing unit 4 moves forward along the lower side of the second transport device 18 (the transport unit 3) as shown by the solid line in FIG. 9. It moves and is moved to the non-operation position B2.

(Configuration of the collection unit)
As shown in FIGS. 1, 2, and 9, the collection unit 5 includes a support frame 44, a support arm 52, a frame 59, a guide cover 61 (see FIGS. 13 to 17), and the like. Installed in part 5.

  A hydraulic cylinder 64 that swings and supports the support frame 44 around the axial center P8 in the left and right direction of the rear portion of the body 10 and swings the support frame 44 is provided between the rear portion of the body 10 and the support frame 44. Connected. By extending and contracting the hydraulic cylinder 64, the support frame 44 can be moved up and down over the raised position E1 and the lowered position E6.

  A potentiometer type position sensor 65 is attached in the vicinity of the shaft core P8, and the position of the support frame 44 is detected by the position sensor 65 between the raised position E1 and the lowered position E6.

  A hydraulic cylinder that swings the support arm 52 is supported by a fork-like support arm 52 that swings up and down around the axis P9 in the left-right direction below the support frame 44. 51 is connected across the support frame 44 and the support arm 52. By extending and retracting the hydraulic cylinder 51, the support arm 52 can be swung to the support position C1 and the disengagement position C2.

  As shown in FIGS. 12 and 13, an arch-shaped (channel-shaped) frame 59 is provided in a front view. The right lateral side portion of the frame 59 is supported by the right end portion of the upper end portion of the support frame 44 so as to be swingable around the left and right axis, and the left lateral side portion of the frame 59 is the upper end portion of the support frame 44. At the left end of the part, it is supported so as to be swingable around the axis in the left-right direction.

  A guide cover 61 is attached to the upper side, right and left lateral sides of the frame 59, and an opening is formed in the center of the guide cover 61. The guide cover 61 is in the form of a sheet having flexibility, such as a synthetic fiber cloth or a synthetic resin vinyl sheet.

(Configuration of collection container)
As shown in FIGS. 1 and 12, a collection container 42 is prepared. The collection container 42 has a box-shaped frame made of a metal frame, and a plate member and a metal mesh are attached to the bottom 42b and the lateral side 42c of the frame, and the upper part 42a is open.

  The collection container 42 can be installed on the support frame 44 and the support arm 52 from the rear side, and can be extracted from the support frame 44 and the support arm 52 to the rear side. In a state where the collection container 42 is installed on the support frame 44 and the support arm 52, the onion A is introduced from the upper part 42 a of the collection container 42 as described later.

(Configuration of hydraulic system in the harvesting section)
As shown in FIG. 4, the airframe 10 is provided with a control device 36. The hydraulic cylinders 13, 28, 32 are provided with electromagnetic operation type control valves 33, 34, 35 for supplying and discharging hydraulic oil.

The control valve 33 includes a neutral position 33N, a raised position 33U, and a lowered position 33D.
When the control valve 33 is operated to the neutral position 33N, the discharge of the hydraulic oil from the oil chamber on the piston rod side of the hydraulic cylinder 13 is blocked, and the extension operation of the hydraulic cylinder 13 is stopped (the lowering of the scraping device 9). Will stop).

  When the control valve 33 is operated to the raised position 33U, the hydraulic oil is supplied to the oil chamber on the piston rod side of the hydraulic cylinder 13, the hydraulic hydraulic oil on the bottom side of the hydraulic cylinder 13 is discharged, and the hydraulic cylinder 13 is The contraction operation (the scraping device 9 rises).

  When the control valve 33 is operated to the lowered position 33D, the hydraulic oil in the oil chambers on the piston rod side and the bottom side of the hydraulic cylinder 13 is discharged, and the hydraulic cylinder 13 is extended by the weight of the scraping device 9 (scratching). The device 9 descends).

The control valve 34 includes a neutral position 34N, a raised position 34U, and a lowered position 34D.
When the control valve 34 is operated to the neutral position 34N, the pilot operation type check valve 45 between the hydraulic cylinder 28 and the control valve 34 operates from the oil chambers on the piston rod side and the bottom side of the hydraulic cylinder 28. The oil discharge is cut off, and the expansion / contraction operation of the hydraulic cylinder 28 stops.

When the control valve 34 is operated to the raised position 34U, the hydraulic cylinder 28 is contracted and the scraping device 9 is lifted to raise the position of the crop introduction part 9a of the scraping device 9.
When the control valve 34 is operated to the lowered position 34D, the hydraulic cylinder 28 is extended, the scraping device 9 is lowered, and the position of the crop introduction part 9a of the scraping device 9 is lowered.

  The control valve 35 is a neutral position 35N where the hydraulic cylinder 32 is stopped, a rising position 35U where the hydraulic cylinder 32 is extended to operate the pick-up device 8 to be lifted, and a lower position where the hydraulic cylinder 32 is contracted to lower the pick-up device 8 Position 35D is provided.

(Configuration of control system in harvesting section)
As shown in FIG. 4, a lift lever 46, lift buttons 47, 48, a floating button 49, and a lift button 50 are provided in the operating unit 6, and the lift lever 46, lift buttons 47, 48, floating button 49 and lift button 49 are lifted. An operation signal of the button 50 is input to the control device 36.

  The control device 36 includes a lifting operation unit 71, a floating operation unit 72, and a lifting operation unit 73 as software. The pick-up device 8 is provided with an upper limit position sensor 63 that detects an upper limit position when the scraping device 9 is raised, and a detection signal of the upper limit position sensor 63 is input to the control device 36.

  The elevating lever 46 is operated manually to operate the control valve 33 (hydraulic cylinder 13), and is provided with a neutral position, a raised position, and a lowered position. Based on the operation of the elevating lever 46, the control valve 33 is operated as follows by the control device 36 (elevating operation unit 71).

  When the elevating lever 46 is operated to the neutral position, the control valve 33 is operated to the neutral position 33N, and when the elevating lever 46 is operated to the raised position, the control valve 33 is operated to the raised position 33U, and the elevating lever 46 is moved. When operated to the lowered position, the control valve 33 is operated to the lowered position 33D.

  The elevating lever 46 is biased to the neutral position. When the elevating lever 46 is released from the state where the elevating lever 46 is operated to the raised position (lowered position) by hand, the elevating lever 46 returns to the neutral position. When the control valve 33 is operated to the raised position 33U and the upper limit position sensor 63 detects that the scraping device 9 has reached the upper limit position, the control valve 33 is automatically operated to the neutral position 33N. .

The raising / lowering button 47 is operated manually to operate the control valve 34 (hydraulic cylinder 28), and includes an up button (not shown) and a down button (not shown). The raising / lowering button 48 is operated manually to operate the control valve 35 (hydraulic cylinder 32), and is provided with an up button (not shown) and a down button (not shown).
The control valves 34 and 35 are operated as follows by the control device 36 (elevating operation unit 71) based on the operation of the elevating buttons 47 and 48 (the up button and the down button).

When the raising buttons of the elevating buttons 47 and 48 are pushed, the control valves 34 and 35 are operated to the raised positions 34U and 35U, and when the lowering button of the elevating buttons 47 and 48 is pushed, the control valves 34 and 35 are operated. Are operated to the lowered positions 34D and 35D.
The raising and lowering buttons of the raising and lowering buttons 47 and 48 are configured to return, and when the push operation of the raising and lowering buttons (lowering buttons) of the raising and lowering buttons 47 and 48 is stopped, the control valves 34 and 35 are in the neutral positions 34N and 35N. To be operated.

By moving the pick-up device 8 up and down, the position of the lower end of the pick-up device 8 can be adjusted to the height of the part where the onion A is placed in the field G.
When the pick-up device 8 is lifted to the upper limit position during movement on the road, contact between the lower end of the pick-up device 8 and the ground can be avoided. When performing the maintenance work of the pick-up device 8, the maintenance work is facilitated by raising the pick-up device 8 to the upper limit position.

  The floating button 49 and the ascending button 50 are manually operated and are configured in a return type. When the floating button 49 and the ascending button 50 are pressed, the control device 36 (floating operation unit 72, ascending operation unit 73) will be described later (floating state of the scraping device in harvesting work) (scratching in the floating state). The operation as described in the operation of raising the insertion device) is performed.

(Configuration of hydraulic system and control system in the recovery unit)
As shown in FIG. 9, the detection signal of the crop sensor 37 is input to the control device 36, and the detection value of the position sensor 65 is input to the control device 36.

Electromagnetic operation type control valves 53, 54, 55 are provided for supplying and discharging hydraulic oil to and from the hydraulic cylinders 40, 51, 64 to expand and contract the hydraulic cylinders 40, 51, 64.
The control unit 36 includes a recovery unit lifting operation unit 74 that operates the control valve 55, a detachment operation unit 75 that operates the control valve 54, a movement operation unit 76 that operates the control valve 53, and a full detection unit 77 as software. ing.

A manual lever type lift switch 56 is provided at the rear of the operation unit 6 (front of the right work deck 7), and an operation signal of the lift switch 56 is input to the control device 36.
The raising / lowering switch 56 can be operated to the stop position, the raising position, and the lowering position, and is biased to the stopping position. ), The control valve 55 is operated, and the hydraulic cylinder 64 is expanded and contracted.

  A release switch 57 and an automatic lowering switch 58 are provided in the rear part of the driving unit 6 (front part of the right work deck 7), and operation signals of the separation switch 57 and the automatic lowering switch 58 are input to the control device 36. Yes.

Both the driver of the driving unit 6 and the auxiliary worker of the right work deck 7 can operate the raising / lowering switch 56, the separation switch 57 and the automatic lowering switch 58.
An alarm buzzer 60 is provided on both the operation unit 6 and the work deck 7, and an alarm lamp 62 is provided on a meter panel (not shown) of the operation unit 6.

(The floating state of the scraping device during harvesting)
The floating state of the scraping device 9 will be described with reference to FIGS. 4 and 10.
By pressing the floating button 49, the floating operation unit 72 can set the floating state and the floating release state.

When the floating button 49 is pushed and operated in the floating release state (steps S1 and S2), the floating state is set (step S4). When the floating button 49 is pushed and operated in the floating state (steps S1 and S3), the floating release state is set (step S5).
In the floating state, the following operations are performed by the floating operation unit 72 and the raising operation unit 73.

When the floating state is set, the control valve 33 is operated and held at the lowered position 33D (step S6).
As a result, the hydraulic cylinder 13 is freely operated to freely extend and contract, and the grounding wheel 16 contacts the field G, whereby the scraping device 9 (the crop introduction part 9a) is supported from the field G to the set height. This is a state, and the scraping device 9 moves up and down along the field G as the body 10 advances.

  In the floating state, the hydraulic cylinder 28 can be expanded and contracted by pushing and operating the ascending and descending buttons of the ascending / descending button 47, so that the position of the crop introduction part 9a of the scraping device 9 can be changed to high or low.

  In the floating state, when the contact portion 23b of at least one of the right and left subsidence sensors 23 comes into contact with the field G and the subsidence sensor 23 is turned on (step S7), the ground ring 16 sinks into the field G. It is judged that

  As a result, the ascending operation unit 73 is activated (step S8), and the control valve 33 is operated to the ascending position 33U in preference to the floating operation unit 72 (floating state) (step S9), and the hydraulic cylinder 13 contracts. In operation, the scraping device 9 is raised.

  When the scraping device 9 is raised, the contact portion 23b of the subtraction sensor 23 moves away from the field G and the subtraction sensor 23 is turned off (step S10), and the control valve 33 is in the neutral position 33N. (Step S11), the raising operation of the scraping device 9 is stopped.

  When the control valve 33 is operated to the neutral position 33N, the elapsed time is counted by a timer (not shown), and when the preset time T1 has elapsed (step S12), the ascending operation unit 73 is released. The control valve 33 is operated and held at the lowered position 33D by the floating operation unit 72 (step S14), and returns to the floating state.

  When the scraping device 9 returns to the floating state with the raising operation, the scraping device 9 descends by its own weight, and when the grounding wheel 16 contacts the field G, the descending of the scraping device 9 stops. Thus, the scraping device 9 is supported at a set height from the field G.

(Raising operation of the scraping device in the floating state)
When one harvesting process is completed, the scraping device 9 is lifted to turn the body 10 and the scraping device 9 is lowered to enter the next harvesting stroke. Hereinafter, an ascending operation and a descending operation of the scraping device 9 for performing turning or the like will be described with reference to FIGS. 4 and 11.

  As described in the previous section (floating state of the scraping device in the harvesting operation), when the ascending button 50 is pushed in the floating state (step S21), the ascending operation unit 73 is activated (step S22).

  Thereby, the operation of the floating operation unit 72 is released by the ascending operation unit 73 (operation state), the floating release state is set (step S23), and the control valve 33 is operated to the ascending position 33U (step S24). Then, the hydraulic cylinder 13 contracts and the scraping device 9 is raised.

  When the upper limit position sensor 63 detects that the scraping device 9 has reached the upper limit position (step S25) (see the state of the chain line in FIG. 3), the control valve 33 is operated to the neutral position 33N (step S26). ), The raising of the scraping device 9 stops.

When the scraping device 9 is operated to the upper limit position, the machine body 10 is swung, and when the machine body 10 reaches a position to start the next harvesting process, the floating button 49 may be pushed and operated ( Step S27).
When the floating button 49 is pressed, the ascending operation unit 73 is released (step S28), the floating state is set (step S29), and the process proceeds to step S1 in FIG.

  If the floating state is set in a state where the scraping device 9 is located at the upper limit position, the scraping device 9 is lowered by its own weight, and the grounding wheel 16 contacts the field G. The descent stops and the scraping device 9 is supported from the field G to the set height.

Instead of the aforementioned pressing operation of the floating button 49, the elevating lever 46 may be operated to the lowered position (step S30).
When the elevating lever 46 is operated to the lowered position, the raising operation unit 73 is released (step S31), and the control valve 33 is operated to the lowered position 33D (step S32) while the floating release state is maintained (step S32). The insertion device 9 is lowered, and the process proceeds to step S1 in FIG.

  By operating the raising / lowering lever 46, the scraping device 9 can be raised / lowered to an arbitrary height, and thereafter, by pressing the floating button 49 (steps S1, S2 in FIG. 10), A floating state can be set.

(Work flow at the start of harvesting work in the collection department)
When the harvesting operation is performed as described in the above item (floating state of the scraping device in the harvesting operation) (the raising operation of the scraping device in the floating state), the flow of the harvesting operation in the collection unit 5 Will be described as described below (flow of work at the start of harvesting work in the collection unit) to (flow of work for replacing the collection container).

  As shown in FIG. 9, based on the operation signals of the up / down switch 56, the separation switch 57 and the automatic lowering switch 58, and the detection signals of the position sensor 65 and the crop sensor 37, the control device 36 (the collection unit up / down operation unit 74, the separation operation). The control valves 53, 54, and 55 are operated by the unit 75, the movement operation unit 76, and the full detection unit 77).

As shown in FIG. 12, when the machine body 10 is stopped, an empty collection container 42 is installed on the support frame 44 and the support arm 52 from the rear side by another work vehicle (not shown).
In this case, the support frame 44 is located at the lowered position E6, the support arm 52 is located at the support position C1, the dispersion portion 4 is located at the non-operation position B2, and the guide cover 61 and the frame 59 are erected.

  The end portion of the second transfer device 18 (the end portion 3a of the transfer portion 3) protrudes rearward from the axis P8 in a side view and enters the opening of the guide cover 61, and the upper portion 42a of the collection container 42. It is located on the upper side.

  In the state shown in FIG. 12, the up / down switch 56 is operated to the raised position, and as shown in FIG. 13, the hydraulic cylinder 64 is extended, and the support frame 44 is raised. At the same time, the hydraulic cylinder 40 is contracted, and the dispersing portion 4 is automatically moved from the non-operation position B2 through the opening of the guide cover 61 to the operation position B1.

  As shown in FIG. 13, when the support frame 44 reaches the raised position E1, the hydraulic switch 64 is stopped by operating the elevation switch 56 to the stop position. When the dispersion unit 4 reaches the operating position B1, the hydraulic cylinder 40 automatically stops.

  When the support frame 44 is lifted from the lowered position E6, the guide cover 61 and the frame 59 tend to fall forward, and the guide cover 61 and the frame 59 come into contact with the frame 19 so that the guide cover 61 61 and the frame 59 are in a state along the upper part 42 a of the collection container 42.

  In a state where the support frame 44 is located at the raised position E1, the collection container 42 is in a sideways posture in which the upper part 42a of the collection container 42 is directed forward (laterally), and the end portion (conveyance) of the second conveyance device 18 The terminal part 3 a) of the part 3 and the dispersion part 4 enter the upper part 42 a of the recovery container 42 and enter the inside of the recovery container 42.

(Flow of the first half of harvesting work in the collection department)
As shown in FIG. 13, with the support frame 44 positioned at the raised position E1, the automatic lowering switch 58 is operated to the ON position, and the harvesting operation is started.

  As shown in FIG. 14, in a state where the support frame 44 is located at the ascending position E1, the collection container 42 is disposed below the terminal portion (the terminal portion 3a of the transport unit 3) of the second transport device 18 and the dispersion unit 4. The lateral portion 42c is located instead of the bottom portion 42b, and the drop between the terminal portion (the terminal portion 3a of the conveying portion 3) and the dispersing portion 4 of the second conveying device 18 and the lateral side portion 42c of the collection container 42 is small. It has become a thing.

  Thereby, when the onion A is thrown into the collection container 42 from the terminal part of the second transport device 18 (terminal part 3a of the transport part 3), the onion A falls to the lateral side part 42c of the recovery container 42, Onion A is the terminal part of the second conveying device 18 because the drop between the terminal part (the terminal part 3a of the conveying part 3) and the dispersing part 4 of the second conveying device 18 and the lateral side part 42c of the collection container 42 is small. The onion A can be prevented from being damaged when it is introduced into the collection container 42 from (the end portion 3a of the transport unit 3).

  Since the onion A that has come out from the end portion of the second transport device 18 (the end portion 3a of the transport portion 3) hits the dispersion portion 4, the onion A is thrown into the collection container 42 while being dispersed by the dispersion portion 4. The onions A easily enter into each part of the recovery container 42 without being biased to a part of the recovery container 42, and the onions A easily enter the corners of the recovery container 42.

  When the onion A falls to the side part 42c of the collection container 42, the onion A often rolls from the side part 42c of the collection container 42 to the bottom part 42b side of the collection container 42. 18 is put into the collection container 42 without staying below the terminal portion 18 (terminal portion 3a of the transport unit 3).

(The middle half of the harvesting work in the collection department)
As the harvesting operation proceeds, the onion A is stacked in the collection container 42, and the onion A reaches the position of the crop sensor 37. When the onion A stacked in the collection container 42 is detected by the crop sensor 37, the onion A is located in the vicinity of the end portion (the end portion 3a of the transfer portion 3) of the second transfer device 18 (in the vicinity of the dispersion portion 4). It is judged that it exists.

  As shown in FIGS. 9 and 14, when the automatic lowering switch 58 is operated to the ON position, a plurality of intermediate positions E2, E3, E4, E5 are set between the rising position E1 and the lowering position E6. Has been.

When the onion A stacked in the collection container 42 is detected by the crop sensor 37 as described above, the hydraulic cylinder 64 is contracted and the support frame 44 is lowered from the raised position E1 as shown in FIG. When the support frame 44 reaches the intermediate position E2, the hydraulic cylinder 64 stops based on the detection value of the position sensor 65.
When the support frame 44 is lowered to the intermediate position E <b> 2, the onion A stacked in the collection container 42 is separated downward from the crop sensor 37.

When the onion A stacked in the collection container 42 is detected by the crop sensor 37 with the progress of the harvesting operation with the support frame 44 positioned at the intermediate position E2, the hydraulic cylinder 64 is contracted to support the onion A. When the frame 44 is lowered from the intermediate position E2 and the support frame 44 reaches the intermediate position E3, the hydraulic cylinder 64 stops based on the detection value of the position sensor 65.
When the support frame 44 is lowered to the intermediate position E <b> 3, the onion A stacked in the collection container 42 is separated downward from the crop sensor 37.

(The latter half of the harvesting work in the collection department)
By repeating the operation described in the previous section (middle half flow of harvesting operation in the collection unit), the support frame 44 is moved from the raised position E1 to the intermediate position E2, from the intermediate position E2 to the intermediate position E3, and from the intermediate position E3 to the intermediate position. The position is automatically lowered in steps from the position E4, the intermediate position E4 to the intermediate position E5, and from the intermediate position E5 to the lowered position E6.

  When the automatic lowering switch 58 is operated to the ON position, the above-described automatic lowering operation of the support frame 44 is performed. When the automatic lowering switch 58 is operated to the OFF position, as described above. The automatic lowering operation of the support frame 44 is not performed.

  When the automatic lowering switch 58 is operated to the OFF position, the driver or the auxiliary operator operates the elevating switch 56 to the lowered position and the stopped position, so that the support frame 44 is moved from the raised position E1 to the lowered position E6. It can be lowered to an arbitrary position and stopped.

  When the support frame 44 is lowered from the raised position E1 to the lowered position E6 through the intermediate positions E2 to E5, the end portion (the end portion 3a of the transfer portion 3) and the dispersion portion 4 of the second transfer device 18 are moved. Then, the recovery container 42 is gradually pulled out from the upper portion 42a.

  Along with this, the collection container 42 changes from a sideways posture at the raised position E1 to an upright position with the upper portion 42a of the collection container 42 facing upward. A enters every corner of the collection container 42.

  The guide cover 61 and the frame 59 are moved down together with the support frame 44, and the guide cover 61 is positioned around the upper part 42 a of the collection container 42. Accordingly, the guide cover 61 prevents the onion A from spilling out from the upper portion 42 a of the collection container 42.

  As shown in FIG. 16, in a state where the support frame 44 is located at the lowered position E6, the collection container 42 is disposed below the terminal portion of the second transport device 18 (the terminal portion 3a of the transport unit 3) and the dispersion unit 4. The recovery container 42 stands up so that the upper part 42 a is positioned and the bottom part 42 b of the recovery container 42 is positioned below the upper part 42 a of the recovery container 42.

  Thereby, the onion A is thrown into the collection container 42 from the terminal part (the terminal part 3a of the transport part 3) of the second transport device 18 without spilling, and the recovery container 42 can be filled without difficulty. it can.

(Flow of the end of harvesting work in the collection department)
When the onion A stacked on the collection container 42 is detected by the crop sensor 37 in a state where the position sensor 65 detects that the support frame 44 is located at the lowered position E6, the full detection unit 77 causes the collection container 42 to be Since it is determined that the alarm is sufficiently full, the alarm buzzer 60 is activated and the alarm lamp 62 is lit.

  When a predetermined time (for example, several seconds) elapses after the alarm buzzer 60 is activated and the alarm lamp 62 is lit, the alarm buzzer 60 is stopped and the alarm lamp 62 is turned off. When the alarm buzzer 60 is stopped and the alarm lamp 62 is extinguished, as shown in FIG. 17, the hydraulic cylinder 40 is extended, and the dispersing portion 4 passes from the operating position B1 through the opening of the guide cover 61 to the non-operating position. The movement operation is automatically performed to B2.

  After the state shown in FIG. 17, the harvesting operation is continued a little, so that the dispersion unit 4 is located at the non-operation position B <b> 2 from the terminal end of the second transport device 18 (the terminal end 3 a of the transport unit 3). Onion A can be put in every corner of the collection container 42.

  In this case, as described in the previous section (the latter half of the harvesting operation in the collection unit), the harvesting unit 2 is stopped in a state where the body 10 is stopped separately from the state in which the harvesting operation is continued while the body 10 is advanced. Alternatively, it is possible to operate the transport unit 3 so as to put the onion A remaining in the pick-up device 8, the first transport device 17, and the second transport device 18 into the collection container 42.

(Recovery container replacement workflow)
As described in the previous section (Flow of completion of harvesting operation in collection unit), when the collection container 42 is full, the harvesting operation is interrupted and the collection container 42 is replaced.

As shown in FIG. 18, the airframe 10 is slightly moved backward to stop, and the auxiliary operator operates the guide cover 61 and the frame 59 in the standing state.
The front and rear length of the bottom portion 42 b of the collection container 42 is set to be slightly longer than the front and rear length of the support arm 52, and the rear end portion of the bottom portion 42 b of the collection container 42 is behind the rear end portion of the support arm 52. Protruding.

  When the release switch 57 is operated in the state shown in FIG. 18, the hydraulic cylinder 51 is contracted and the support arm 52 is operated to the release position C2. Thereby, as shown in FIG. 19, the collection container 42 is tilted backward, and the rear end portion of the bottom 42 b of the collection container 42 contacts the field G.

  When the machine body 10 is advanced in the state shown in FIG. 19, the support arm 52 is moved away from the bottom 42 b of the collection container 42 by resistance due to the ground contact between the rear end portion of the bottom 42 b of the collection container 42 and the field as shown in FIG. 20. This is a state where the container is pulled out to the front side (a state where the collection container 42 is pulled out from the support arm 52 to the rear side), and the full collection container 42 is removed from the support frame 44 and the support arm 52 and placed in the field G.

  As shown in FIG. 20, when the full collection container 42 is removed from the support frame 44 and the support arm 52, the hydraulic cylinder 51 is automatically extended and the support arm 52 is operated to the support position C1. Return to the state shown in.

  As shown in FIG. 12, an empty collection container 42 is installed on the support frame 44 and the support arm 52 from the rear side by another work vehicle (not shown), and the full collection container 42 placed on the field G is provided. The harvesting operation is resumed from the state shown in FIG. 12, as described in the previous section (Work flow at the start of the harvesting operation in the collection unit).

(First embodiment of the invention)
In the right grounding ring 16, a cover 24 (sink sensor 23) may be attached to the lateral side portion 21 b on the left side of the cover 21 (the crop introduction unit 9 a side of the scraping device 9).
In the left ground ring 16, a cover 24 (sink sensor 23) may be attached to the lateral side part 21 b on the right side of the cover 21 (on the crop introduction part 9 a side of the scraping device 9).

The state where the lower end portion of the contact portion 23b of the subduction sensor 23 is located at substantially the same position (or a little lower side) as the shaft core P5 (the rotating shaft of the grounding wheel 16) in a side view is the lowest position of the subduction sensor 23. It is good.
In this configuration, the position of the sink sensor 23 is changed to the upper side, and the lower end portion of the contact portion 23b of the sink sensor 23 is set to the shaft core P5 (rotation axis of the ground ring 16) and the upper end portion of the ground ring 16 in a side view. You may comprise so that it can arrange | position between 16b.

  The sinking sensor 23 (contact portion 23b) is arranged on the rear side of the shaft core P5 (the rotating shaft of the grounding wheel 16) of the grounding wheel 16 in a side view, and is arranged on the front side of the rear end portion 16c of the grounding wheel 16. You may comprise.

(Second embodiment of the invention)
Instead of the grounding ring 16, a warped grounding part may be used.
Rather than providing the sinking sensor 23 in both the right and left grounding wheels 16 (grounding part), the sinking sensor 23 is provided in the right grounding wheel 16 (grounding part) and the left grounding wheel 16 (grounding part). The sink sensor 23 may not be provided.
Conversely, the sinking sensor 23 may be provided on the left grounding wheel 16 (grounding part), and the sinking sensor 23 may not be provided on the right grounding wheel 16 (grounding part).

(Third Another Embodiment of the Invention)
The covers 21 and 22 may be abolished.
According to this configuration, the sinking sensor 23 may be provided on the support member that supports the grounding ring 16 (grounding part) on the support frame 20, or the sinking sensor 23 may be provided on the support frame 20.

(Fourth embodiment of the invention)
The harvesting unit 2 (the picking device 8 and the scraping device 9) is supported by the machine body 10 so as to be movable up and down, and the harvesting unit 2 (the picking device 8 and the scraping device 9) is removed from the field G by the grounding ring 16 (grounding unit). What is necessary is just to comprise so that it may support in setting height.

In the harvesting section 2, the scraping device 9 may be eliminated.
According to this configuration, the harvesting unit 2 (pickup device 8) is supported by the machine body 10 so as to be movable up and down, and the harvesting unit 2 is supported at a set height from the field G by the ground ring 16 (grounding unit). do it.

The present invention can be applied not only to the onion A harvesting machine but also to a harvesting machine that harvests potatoes, carrots, radishes, and the like in the field G while traveling and stores them in the recovery unit of the aircraft.
The present invention is not limited to a harvesting machine that collects a crop excavated from the field G and placed in the field G for several days, but also excavates the crop from the field G and does not place the crop in the field G. The present invention can also be applied to a harvesting machine that stores, or a harvesting machine that digs out a crop buried in the field G and places the crop at a position where the crop is excavated.

2 Harvesting unit 8 Picking device 9 Scratching device 9a Crop introduction unit 10 Airframe 16 Ground ring (grounding unit)
16a Lower end part of ground ring (ground part) 16b Upper end part of ground ring 16d Front end part of ground ring 21 Cover 23 Sink sensor 73 Lifting operation part A Onion (crop)
G field P5 axis T1 set time

Claims (9)

A harvesting unit that is supported by the aircraft so as to be movable up and down, and that harvests crops in the field as the aircraft advances,
A grounding unit provided in the harvesting unit, which contacts the field and supports the harvesting unit at a set height from the field;
A subduction sensor for detecting that the grounding unit has submerged in the field;
A harvesting machine comprising: an ascending operation unit configured to ascend the harvesting unit when the subsidence sensor detects that the ground contact unit is submerged in a farm field. The ascending operation part is
After the lifting operation of the harvesting unit based on the detection of the subduction sensor, when the preset time has elapsed, the grounding unit returns to the state in which the harvesting unit is supported from the field to the set height. The harvester according to claim 1. The harvesting section is
A pick-up device that is provided at the front of the aircraft and picks up and harvests crops in the field as the aircraft advances;
A picking device that is supported on the front portion of the picking device so as to swing up and down and extends to the front side, touches the crop from the upper side of the field, and handles the crop to the picking device side;
The grounding portion is provided at a front portion of the scraping device, and supports the scraping device at a set height from a field.
The harvesting machine according to claim 1 or 2, wherein the ascending operation unit performs an ascending operation on the scraping device when the subtraction sensor detects that the grounding unit has submerged in a farm field. The grounding portion is provided on the right and left outer portions of the crop introduction portion at the front of the scraping device,
The harvest according to claim 3, wherein the subsidence sensor is provided on a lateral outer side opposite to the crop introduction part in a plan view in at least one of the right and left grounding parts. Machine.   The said subduction sensor is arrange | positioned above the lower end part of the said earthing | grounding part by a side view, and detects that the said earthing | grounding part sank in the agricultural field by contacting with an agricultural field. The harvester according to any one of the above. The grounding portion is a grounding ring that is rotatable around a horizontal axis.
The harvesting machine according to claim 5, wherein the sinking sensor is disposed above the lower end portion of the grounding wheel and below the upper end portion of the grounding wheel in a side view. A cover for covering the front side of the ground ring is provided;
The harvester according to claim 6, wherein the sinking sensor is provided on the cover.   The harvesting machine according to claim 6 or 7, wherein the sinking sensor is disposed in front of a rotating shaft of the grounding wheel and rearward of a front end portion of the grounding wheel in a side view. A cover for covering the front side of the ground ring is provided;
The harvesting machine according to claim 6 or 7, wherein the sinking sensor is disposed in front of a rotating shaft of the grounding wheel and in rear of the front end of the cover in a side view.

Images