Vegetable harvester

Abstract

To provide a vegetable harvester configured to include a plurality of harvest transfer parts corresponding to each rows for transferring the vegetable that has been pulled out by pinching a foliage part, which can set an appropriate height of a transfer inlet of the harvest transfer part even when a field surface on both right-left sides of the machine body is irregular.SOLUTION: A vegetable harvester for harvesting a garlic 2 from soil, includes: a vehicle body: and a plurality of harvest transfer part aligned in parallel on right-left direction of the machine body with respect to the vehicle body, the harvest transfer part transferring the garlic 2. The plurality of harvest transfer parts are divided into a plurality of support units 201, 202 including at least one harvest transfer part in the right-left direction of the machine body. A tip end part of the harvest transfer part is supported for each of the support units 201, 202 so as to adjust a ground height with respect to the vehicle body.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a vegetable harvester for harvesting bulb vegetables such as garlic, onions, and lilies, and root vegetables such as carrots.

Background Art

[0002] Conventionally, as a vegetable harvester for harvesting vegetables such as bulb vegetables (bulb crops) such as garlic and root vegetables such as carrots, the vegetables cultivated in the field are pulled out and conveyed while sandwiching the foliage part extending from the soil to the ground, and unnecessary parts such as the foliage part and the root part are cut off during the conveyance to harvest the main body part of the vegetable. This type of vegetable harvester includes a pulling and conveying device that conveys the vegetables pulled out from the ground in a suspended state while sandwiching the foliage part, and a cutting device that cuts the foliage part and the root part of the vegetable to separate them from the main body part of the vegetable (see, for example, Patent Document 1).

[0003] Patent Document 1 describes a vegetable harvester having a configuration for harvesting row-planted vegetables, which includes a plurality of sets of harvesting work units including a pulling and conveying device and a foliage cutting device so as to correspond to each row, and is configured to harvest vegetables row by row. The vegetable harvester described in Patent Document 1 includes two sets of harvesting work units and is configured to harvest two rows of vegetables simultaneously.

[0004] Also, as disclosed in Patent Document 1, in a vegetable harvester, in order to set the clamping position of the foliage part by the pulling and conveying device at an appropriate height position, a gauge wheel, which is a ground wheel for vertical position adjustment, is provided at the front part of the harvesting work unit. The harvesting work unit is rotatably provided so that the front end side can be moved up and down by a support shaft provided at the rear part of the machine body. By adjusting the height of the gauge wheel with respect to the harvesting work unit, the ground height (the height of the conveyance entrance) of the front end part of the harvesting work unit that sandwiches the foliage part by the pulling and conveying device is adjusted. Patent Document 1 discloses a configuration including a pair of left and right gauge wheels arranged on the left and right sides of the front parts of a pair of left and right pulling and conveying devices.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] According to the configuration disclosed in Patent Document 1, there are the following problems. In the field, due to the terrain such as the shape of the ridges and the slope of the ground, there may be a height difference in the ground (field surface) on both the left and right sides of the machine body. In such a case, for example, only one of the left and right gauge wheels may be in contact with the ground, and in such a state, the clamping height (the height of the inlet) of the foliage part by the plurality of extraction and conveying devices is maintained by the gauge wheel in contact with the ground.

[0007] Thus, according to the configuration in which a plurality of gauge wheels are located at a common height for all the extraction and conveying devices, it may be difficult to adjust the height of the inlet of the extraction and conveying device to an appropriate height according to the height difference in the field surface on both the left and right sides of the machine body. The inappropriate height of the inlet of the extraction and conveying device is a cause of problems such as harvesting losses such as missed digging of vegetables and dropping during conveyance, and defects such as poor cut length of the foliage part by the cutting device.

[0008] The present invention has been made in view of the above problems, and in a configuration in which a plurality of harvest conveyors for pulling out and conveying while clamping the foliage part of vegetables are provided corresponding to each row, even when there is a height difference in the field surface on both the left and right sides of the machine body, an object is to provide a vegetable harvester capable of setting the height of the inlet of the harvest conveyor to an appropriate height.

Means for Solving the Problems

[0009] The vegetable harvester according to the present invention is a vegetable harvester for harvesting vegetables from the soil, comprising a traveling machine body and a plurality of harvested product conveying units that are arranged in parallel in the left-right direction of the machine body and convey vegetables. The plurality of harvested product conveying units are divided into a plurality of units including at least one of the harvested product conveying units in the left-right direction of the machine body, and for each unit, the ground clearance of the tip of the harvested product conveying unit is supported so as to be adjustable with respect to the traveling machine body.

[0010] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, wherein the plurality of units are supported so as to be integrally movable up and down with respect to the traveling machine body.

[0011] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, wherein the harvested product conveying unit includes a pulling and conveying device that pulls out vegetables from the soil and conveys them while clamping the foliage of the pulled-out vegetables.

[0012] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, comprising a work frame that supports the plurality of harvested product conveying units with respect to the traveling machine body, and the plurality of harvested product conveying units are supported so as to be swingable with respect to the work frame about a rotation axis provided at the rear of the plurality of harvested product conveying units.

[0013] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, comprising a ground clearance adjusting mechanism provided for each unit to adjust the ground clearance of one or a plurality of the harvested product conveying units constituting the unit.

[0014] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, wherein the work frame is supported so as to be rotatable about a frame rotation axis with respect to the traveling machine body.

[0015] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, wherein a support device for supporting the plurality of units from below is provided on the work frame, and the plurality of units are configured to rotate upward about the frame rotation axis in conjunction with the upward rotation of the work frame with respect to the traveling body by receiving an action from the support device.

[0016] The vegetable harvester according to another aspect of the present invention is the vegetable harvester, which is provided in front of the traveling body and includes a foliage raising device for raising the foliage of the vegetable, and the foliage raising device is supported so as to be movable up and down with respect to the work frame.

Advantages of the Invention

[0017] According to the present invention, in a configuration in which a plurality of harvesting material conveying units for nipping and pulling out and conveying the foliage of the vegetable are provided corresponding to each row, even when there is a height difference in the field surface on both the left and right sides of the machine body, the height of the inlet of the harvesting material conveying unit can be set to an appropriate height.

Brief Description of the Drawings

[0018]

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Mode for Carrying Out the Invention

[0019] In the embodiments of the present invention described below, as a vegetable harvester according to the present invention, a garlic harvester that harvests garlic, which is a type of bulb vegetable, as the vegetable to be harvested will be described as an example. However, the vegetable harvester according to the present invention can be widely applied as a vegetable harvester that harvests other bulb vegetables such as onions and root vegetables such as carrots.

[0020] As shown in FIGS. 1 to 4, the vegetable harvester 1 according to the present embodiment is for harvesting garlic 2 (see FIG. 4) from the soil, and is a garlic harvester that pulls out and harvests the garlic 2 planted in the field from the soil. In the field, the garlic 2 is continuously planted in rows along a straight line. In the following description, the left side (the lower side in FIG. 2) and the right side (the upper side in FIG. 2) facing the front of the vegetable harvester 1 are defined as the left side and the right side of the vegetable harvester 1, respectively.

[0021] The vegetable harvester 1 pulls out the garlic 2 planted in the soil while sandwiching the foliage part 2b extending above the ground from the bulb part 2a in the soil, and conveys it rearward and upward while maintaining the suspended posture of the garlic 2 with the foliage part 2b sandwiched. During the conveyance, the foliage part 2b and the root part 2c, which are root hairs extending from the bottom of the bulb part 2a, are cut off and separated from the bulb part 2a, and the remaining bulb part 2a is harvested. The foliage part 2b separated from the bulb part 2a is discharged to a predetermined part in the vegetable harvester 1.

[0022] The vegetable harvester 1 is a self-propelled harvester, and performs a harvesting operation of continuously pulling out and conveying a plurality of rows of garlic 2 for harvesting while traveling along the line of the row planting of the garlic 2. The vegetable harvester 1 according to the present embodiment has a configuration for six rows that simultaneously pulls out, conveys, and harvests six rows of garlic 2. The vegetable harvester 1 uses the bulb part 2a of the garlic 2 as the part to be harvested, and this bulb part 2a corresponds to the main body part of the vegetable.

[0023] As shown in FIGS. 1 to 4, the vegetable harvester 1 includes a traveling body 3 having a pair of left and right crawler traveling devices 4 as traveling devices, an operation unit 5 where various operations such as the traveling operation and the harvesting operation of the vegetable harvester 1 are performed by the driver (operator) of the vegetable harvester 1, and a harvesting unit 6 for harvesting garlic 2. Further, the vegetable harvester 1 includes a conveyor 7 as a conveying device for conveying the garlic 2 harvested by the harvesting unit 6, a storage unit 8 for storing the garlic 2 conveyed by the conveyor 7 in a predetermined collection container, and a leaf discharging conveyor 9 for discharging the foliage part 2b separated from the bulb part 2a to the field. Note that FIG. 4 is a side cross-sectional view taken at the A-A position in FIG. 2.

[0024] The traveling body 3 includes a body frame 15 that is three-dimensionally framed by a plurality of frame members (see FIG. 4), and the crawler traveling devices 4 are arranged on both the left and right sides of the body frame 15. The operation unit 5, the harvesting unit 6, the conveyor 7, the storage unit 8, and the leaf discharging conveyor 9 are provided with respect to the body frame 15.

[0025] The crawler traveling device 4 constitutes a crawler part for moving the body in the traveling body 3. The crawler traveling device 4 has a drive wheel 4a supported at the rear lower part of the body frame 15, a driven wheel 4b provided at the front end of the crawler traveling device 4, a plurality of rolling wheels 4c, and a crawler 4d wound around these wheels. The left and right crawler traveling devices 4 are driven by receiving the transmission of the power of the engine 10 provided in the vegetable harvester 1.

[0026] The engine 10 is mounted on the right side of the middle part in the front and rear of the traveling body 3 (see FIG. 2). A transmission 11 is provided between the rear upper parts of the left and right crawler traveling devices 4 (see FIG. 4). The transmission 11 appropriately shifts the power from the engine 10 and transmits it to the left and right crawler traveling devices 4.

[0027] The operation unit 5 is provided on the right side of the middle part in the front-rear direction of the traveling body 3. The operation unit 5 is provided on a frame part that protrudes to the right from the frame part that supports the harvesting unit 6, the conveyor 7, etc. in the body frame 15. The operation unit 5 is the part for operating and controlling the vegetable harvester 1.

[0028] The operation unit 5 includes a driver's seat 12 for the driver of the vegetable harvester 1 to sit on, and a front operation unit 13 and a side operation unit 16 that are respectively arranged in front of and to the left of the driver's seat 12 and are operated by an operator sitting on the driver's seat 12. Various operating tools such as levers and switches for operating the traveling of the traveling body 3, the operation of the harvesting unit 6, etc. are arranged on the front operation unit 13 and the side operation unit 16.

[0029] The driver's seat 12 is provided on a driver's seat support part 17 provided on the body frame 15. A horizontal floor part 14 is provided in front of and below the driver's seat 12. A driver's seat support part 17 is provided on the rear side of the floor part 14. The driver's seat support part 17 is configured in a hollow shape, and the inside of the driver's seat support part 17 is an engine room where the engine 10 is arranged.

[0030] The harvesting unit 6 includes a scraping reel 21, a weeding body 22, a digging device 23, a pulling and conveying device 24, a shoulder-aligning device 25, a stem and leaf cutting device 26, a root cutting device 27, and a leaf discharging device 28. These devices are provided in a state of being supported with respect to a predetermined work frame 30 etc. provided in the vegetable harvester 1, and are driven by receiving the transmission of power from the engine 10.

[0031] The harvesting unit 6 has a plurality of conveying and cutting units 40 (see FIG. 7), which are unit configurations including the pulling and conveying device 24, the shoulder-aligning device 25, the stem and leaf cutting device 26, the root cutting device 27, and the leaf discharging device 28. The harvesting unit 6 is provided with six conveying and cutting units 40 arranged side by side according to the configuration for six rows. The six conveying and cutting units 40 have the same position in the front-rear direction.

[0032] The conveying and cutting unit 40 is an example of a harvested product conveying unit that conveys the garlic 2. That is, the vegetable harvester 1 includes six conveying and cutting units 40 as a plurality of harvested product conveying units arranged in parallel in the left-right direction of the machine body with respect to the traveling machine body 3. The six conveying and cutting units 40 are pivotally provided with respect to the traveling machine body 3 so as to be rotatable about a lifting rotation axis O1 serving as a lifting rotation axis having the left-right direction as the axial direction by a shaft support portion 20 (see FIG. 4) provided at a position below the leaf discharging device 28 so as to lift the front side.

[0033] The conveyor 7 is a device that receives the garlic 2 conveyed by the pulling and conveying device 24 and conveys it rearward and upward (rearward and obliquely upward). In the vegetable harvester 1, the conveyor 7 receives the bulb portion 2a whose foliage portion 2b has been cut by the foliage cutting device 26 and conveys the bulb portion 2a rearward and upward.

[0034] The conveyor 7 is provided behind the group of conveying and cutting units 40 and is provided so as to form a continuous conveying path over an intermediate portion of the arrangement range of the six conveying and cutting units 40 in the machine body width direction (left-right direction). In the front-rear direction, the conveyor 7 positions the conveying start end portion below the rear portion of the pulling and conveying device 24 and positions the conveying end portion at the rear end portion of the traveling machine body 3, and extends in an inclined shape with a rearward upward slope. Thereby, the conveyor 7 forms a conveying path from a position below the rear portion of the pulling and conveying device 24 to the rear and obliquely upward. Regarding the rearward upward slope, the conveyor 7 has a gentler slope at the front portion than that of the most part at the rear side and has a two-stage slope (see FIG. 4). That is, the conveyor 7 has a front conveying portion with a relatively gentle rearward upward slope and a rear conveying portion with a relatively steep rearward upward slope, and these conveying portions form a bent conveying surface form in side view.

[0035] The conveyor 7 is a bar conveyor having a plurality of bars 41 with the left-right direction as the extending direction. The plurality of bars 41 include protruding bars having a plurality of protrusions 42 at predetermined intervals. The protrusions 42 have a substantially triangular shape that is elongated in side view and protrude in a direction substantially perpendicular to the conveying surface of the conveyor 7. Both ends of the bar 41 are fixed to an endless chain 44 disposed within chain cases 43 provided on both the left and right sides of the conveyor 7. That is, the bar 41 is installed between the left and right chains 44.

[0036] The conveyor 7 has a conveyor input shaft 45 provided at the conveyance rear end portion located at the rear upper side and a conveyor driven shaft 46 provided at the conveyance start end portion located at the front lower side (see FIG. 4). The conveyor input shaft 45 is rotationally driven upon receiving the transmission of rotational power from the engine 10. An input pulley 47 for receiving the transmission of rotational power from the engine 10 is fixedly provided at the left end portion of the conveyor input shaft 45 (see FIG. 5). The rotational power of the conveyor input shaft 45 is transmitted to the conveyor driven shaft 46 via the left and right chains 44 that support the plurality of bars 41. Sprockets 48, 49 for receiving the winding of the left and right chains 44 are fixedly provided on each of the shafts of the conveyor input shaft 45 and the conveyor driven shaft 46.

[0037] In the conveyor 7 having such a configuration, as the bars 41 move along with the rotation of the left and right chains 44, the bulbous part 2a is conveyed obliquely upward to the rear while being locked by the plurality of protrusions 42 of the protruding bar.

[0038] Guide plates 31 are provided on both the left and right sides of the conveyor 7 (see FIG. 4). The guide plates 31 are configured to guide the bulbous part 2a that is cut off by the foliage cutting device 26 of the conveyance cutting unit 40 and falls outside the width range of the conveyor 7 in the left-right direction onto the conveyor 7. The guide plates 31 are provided in an inclined shape so as to receive the bulbous part 2a that has fallen from below the foliage cutting device 26 located on the left and right outer sides of the conveyor 7 and guide it to the conveyance start end portion of the conveyor 7 located at the left and right intermediate portions, and form an inclined surface that slopes downward from the left and right outer sides toward the left and right inner sides as the guiding surface.

[0039] The storage part 8 is provided at the rear side of the conveyor 7. The storage part 8 is configured to drop the bulb part 2a from the conveyance end part of the conveyor 7 and store it in a harvesting bag 32 such as a harvesting net serving as a collection container (see FIG. 4). The storage part 8 has a guide part 33 that receives the bulb part 2a flowing down from the end of the conveyor 7 and guides it to the harvesting bag 32. The guide part 33 is constituted by a plate-shaped member in a surrounding form, and forms an inlet having an opening width including the entire conveyance width of the conveyor 7 in the left-right direction, and an outlet for dropping the bulb part 2a introduced from the inlet.

[0040] The harvesting bag 32 is set by a bag holding device 34 provided below the guide part 33 so that the upper side faces the outlet of the guide part 33 with the upper side being the open side. The bag holding device 34 is configured to be able to hold a plurality (for example, six) of harvesting bags 32. Below the guide part 33, a support base 35 that supports the harvesting bag 32 attached to the bag holding device 34 from below is provided. The support base 35 is provided so as to horizontally project rearward from the traveling machine body 3 via a support member.

[0041] In the storage part 8 having such a configuration, the bulb part 2a that is conveyed rearward and upward by the conveyor 7 and drops rearward from the conveyance end part of the conveyor 7 is introduced into the guide part 33 from the inlet, passes through the guide part 33, and is stored in the harvesting bag 32. Note that instead of the harvesting bag 32 as a collection container, a container may be placed on the support base 35, and the bulb part 2a dropping from the guide part 33 may be stored in the container.

[0042] The leaf discharging conveyor 9 is provided above the front part of the conveyor 7 at the rear side of the harvesting part 6. The leaf discharging conveyor 9 receives the foliage part 2b separated from the bulb part 2a by the foliage cutting device 26 of each conveyance cutting unit 40 and conveys it to the right, and discharges the foliage part 2b to the right side of the machine body. In the vegetable harvester 1, the right side of the machine body is the already dug side that has been harvested in the harvesting operation of the garlic 2.

[0043] The leaf discharging conveyor 9 extends in the left - right direction so as to span the entire arrangement range of the six conveying and cutting units 40 in the left - right direction. The leaf discharging conveyor 9 has a conveying surface that slopes downward to the front along the inclination of the conveying and cutting unit 40 in side view.

[0044] The leaf discharging conveyor 9 is a belt conveyor and has a driving roller 36 provided at the right - hand conveying end portion, a driven roller 37 provided at the left - hand conveying start portion, and a belt 38 wound around these rollers (see Fig. 5). The driving roller 36 and the driven roller 37 are provided such that the front - rear direction is the rotation axis direction in plan view. The driving roller 36 is rotationally driven by a conveyor drive shaft 39 provided on its front side.

[0045] Hereinafter, each device and the like that constitutes the harvesting unit 6 provided in the vegetable harvester 1 will be described.

[0046] The raking reel 21 is a reel with tines and is provided above the front of the front end portion of the group of conveying and cutting units 40. The raking reel 21 is rotatably supported between a pair of left - and - right reel support arms 51, 51 whose base ends are supported by a work frame 30 that constitutes the harvesting unit 6.

[0047] The raking reel 21 has a reel rotation axis 54 with the left - right direction as the rotation axis direction, and is rotatably supported with the reel rotation axis 54 installed between the tip portions of the pair of left - and - right reel support arms 51, 51. The raking reel 21 continuously acts on the foliage part 2b of the garlic 2 while rotating, rakes the foliage part 2b toward the front end portion side of the group of conveying and cutting units 40, and assists in pulling out the foliage part 2b by the pulling - out conveying device 24.

[0048] The weed separating body 22 is provided so as to project forward from the vicinity of the front end of the conveying and cutting unit 40. The weed separating body 22 is a so-called divider, and while passing through the spaces between the rows, it separates the foliage parts 2b of the garlic 2 lifted by the raking reel 21 into individual rows. Seven weed separating bodies 22 are provided so as to sandwich each row corresponding to six continuously arranged rows in the left-right direction (see Fig. 2). That is, seven weed separating bodies 22 are provided for the six conveying and cutting units 40 so as to be positioned on both the left and right sides of each conveying and cutting unit 40. Each weed separating body 22 is provided in a state of being supported by a weed separating body support part 52 provided for the part on the tip side of the pulling and conveying device 24 of the conveying and cutting unit 40.

[0049] The digging device 23 is provided below the pulling and conveying device 24 of the group of conveying and cutting units 40. The digging device 23 is a so-called subsoiler, and it is a device that enters under the garlic 2 to break up the soil in order to facilitate the pulling out of the garlic 2 by the pulling and conveying device 24. The digging device 23 has a soil-breaking blade 55 which is a plate-shaped digging blade extending in the left-right direction. The soil-breaking blade 55 is provided in an extended shape so as to include the entirety of the six conveying and cutting units 40 in the left-right direction.

[0050] In the digging device 23, the soil-breaking blade 55 is provided so as to swing back and forth upon receiving the transmission of the rotational power of a digging drive shaft 56 (see Fig. 4) arranged in the left-right direction at a position below the rear part of the group of conveying and cutting units 40. The digging drive shaft 56 rotates upon receiving the transmission of power from the engine 10. As the vegetable harvester 1 moves forward, the digging device 23 inserts the soil-breaking blade 55 that swings back and forth into the soil, positions it below the bulb part 2a of the garlic 2, softens the soil, and performs digging for six rows.

[0051] In the harvesting part 6, the six conveying and cutting units 40 have a common configuration. Each device constituting the conveying and cutting unit 40 will be described with reference to Figs. 1 to 7.

[0052] The extraction and conveying device 24 is a device that extracts the garlic 2 from the soil at the front part of the device and conveys it upward and backward while clamping the foliage part 2b of the extracted garlic 2. The extraction and conveying device 24 is provided on the rear side of the scraping reel 21. It clamps the foliage part 2b scraped in by the scraping reel 21, extracts the garlic 2 while conveying the foliage part 2b upward and backward (diagonally upward backward), and conveys the garlic 2 upward and backward in an upright posture. A plurality of (six) extraction and conveying devices 24 are arranged in parallel in the left-right direction of the machine body with respect to the traveling machine body 3.

[0053] The extraction and conveying device 24 is provided in an inclined shape from a position below the rear part of the scraping reel 21 upward and backward. The inclination angle of the extraction and conveying device 24 with respect to the horizontal direction is, for example, about 35°. The extraction and conveying device 24 is provided in an extended shape so that the conveying direction in a plan view follows the front-rear direction.

[0054] The extraction and conveying device 24 has a configuration in which a pair of endless rotating belts, the conveying chains 61, are respectively wound around a driving sprocket 62 which is a driving wheel provided on the rear side which is the lower conveying side, and a driven sprocket 63 which is a driven wheel provided on the front side which is the upper conveying side. That is, the extraction and conveying device 24 is a chain conveying device having a pair of left and right chain clamping bodies 60 around which the conveying chains 61 are wound around the driving sprocket 62 and the driven sprocket 63, and is configured to clamp and convey the foliage part 2b between the left and right chain clamping bodies 60.

[0055] The extraction and conveying device 24 clamps the foliage part 2b by the opposing surfaces of the pair of conveying chains 61 at its front end, and extracts the garlic 2 from the soil by the rotating operation of the conveying chains 61. The pair of conveying chains 61 rotate in a direction in which the opposing sides move in the conveying direction by the rotational driving force of the driving sprocket 62. The driving sprocket 62 and the driven sprocket 63 have the direction orthogonal to the inclination of the extraction and conveying device 24 in a side view of the machine body as the rotation axis direction. A plurality of rotating bodies such as guide sprockets are provided for the conveying chains 61.

[0056] The garlic 2 pulled out by the extraction and conveying device 24 is conveyed rearward and upward in a posture suspended almost vertically while the foliage part 2b is clamped by a pair of conveying chains 61. The extraction and conveying device 24 is extended in the front-rear direction such that the conveyance start end (front end) is positioned in front of the crawler traveling device 4 and the conveyance end (rear end) is positioned at the front-rear intermediate part on the traveling body 3.

[0057] As shown in FIG. 5, the drive sprocket 62 of each chain clamping body 60 is fixed to a conveyance input shaft 65 that rotates upon receiving the transmission of power from the engine 10, and rotates integrally with the conveyance input shaft 65. The conveyance input shaft 65 extends obliquely downward rearward from the rear end of the chain clamping body 60 and is installed inside a cylindrical conveyance input shaft case 66 along the axial direction of the conveyance input shaft 65 (see FIG. 7). When the drive sprocket 62 rotates, the driven sprocket 63 rotates along with the rotation of the conveyance chain 61.

[0058] The shoulder alignment device 25 is provided below the rear part of the extraction and conveying device 24. The shoulder alignment device 25 is an example of a positioning device for aligning the height positions of the bulbous parts 2a of the garlic 2 being conveyed by the extraction and conveying device 24.

[0059] The shoulder alignment device 25 aligns the height of the shoulders of the garlic 2 being conveyed at the lower part of the rear part of the extraction and conveying device 24 with the upper part of the bulbous part 2a of the garlic 2 as the shoulder. The shoulder alignment device 25 is provided along an inclined plane that rises gently rearward and is less inclined than the extraction and conveying device 24 in a side view. The inclination angle of the shoulder alignment device 25 with respect to the horizontal direction is, for example, about 20°.

[0060] The shoulder alignment device 25 has a pair of left and right endless rotating members, namely left and right shoulder alignment chains 71, which position the leaf and stem portions 2b of the garlic 2 being conveyed by the extraction and conveying device 24 between them and rotate in a direction to move the opposite side toward the conveying direction side of the garlic 2. The shoulder alignment device 25 has a configuration in which a pair of left and right shoulder alignment chains 71 are wound around a drive sprocket 72, which is a drive wheel provided at approximately the center in the conveying direction, a rear driven sprocket 73 and a front driven sprocket 74, which are driven wheels provided on the rear side, which is the lower conveyance side, and the front side, which is the upper conveyance side, respectively. That is, the shoulder alignment device 25 is provided with a pair of left and right chain conveyors 70 in which the shoulder alignment chains 71 are wound around the drive sprocket 72 and the front and rear driven sprockets 73, 74, and is configured to position the leaf and stem portions 2b between the left and right chain conveyors 70.

[0061] The pair of shoulder alignment chains 71 form a movement path for the leaf and stem portions 2b by the portions facing each other, and rotate in a direction to move the sides facing each other in the conveying direction of the leaf and stem portions 2b by the rotational drive of the drive sprocket 72. The drive sprocket 72 and the front and rear driven sprockets 73, 74 have a rotation axis direction perpendicular to the inclination of the shoulder alignment device 25 in a side view of the machine body. The interval between the opposing surfaces of the pair of shoulder alignment chains 71 is set to be narrower than the width of the shoulders of the bulb portion 2a of a general garlic 2.

[0062] The shoulder alignment device 25 positions the front end portions of the respective chain conveyors 70 directly below the approximate center in the front-rear direction of each chain clamping body 60 of the extraction and conveying device 24. In a side view, the shoulder alignment device 25 forms a substantially "V" shape together with the rear portion of the extraction and conveying device 24 due to the difference in the inclination angle with the extraction and conveying device 24, and gradually widens the vertical interval with the extraction and conveying device 24 from the front side to the rear side.

[0063] As shown in FIG. 5, each chain conveyor 70 of the shoulder alignment device 25 receives the transmission of the power of the conveying input shaft 65 via the shoulder alignment drive chain mechanism 75, and rotationally drives the drive sprocket 72. The shoulder alignment drive chain mechanism 75 includes a drive sprocket 76 fixed to the conveying input shaft 65, a driven sprocket 77, and a chain 78 wound around these sprockets (see FIG. 6).

[0064] The shoulder alignment drive chain mechanism 75 is provided in a chain case 80 disposed above the rear end portion of the pulling conveyor 24. The driven sprocket 77 is fixed to the upper end portion of a rotating shaft 79 arranged in parallel with the conveying input shaft 65. The rotating shaft 79 protrudes downward from the chain case 80 and penetrates the inner peripheral side of the conveying chain 61 of the pulling conveyor 24 and extends downward, and is connected to the shoulder alignment drive shaft 85 via a universal joint 82 (see FIG. 7). A drive sprocket 72 is fixed to an intermediate portion of the shoulder alignment drive shaft 85. The shoulder alignment drive shaft 85 has its axial direction parallel to the rotational axial directions of the front and rear driven sprockets 73, 74. Thus, the shoulder alignment device 25 is configured to receive the transmission of the rotational power of the conveying input shaft 65 via the shoulder alignment drive chain mechanism 75, the rotating shaft 79, and the shoulder alignment drive shaft 85, and drive together with the pulling conveyor 24.

[0065] The shoulder alignment device 25 positions the foliage portion 2b of the garlic 2 conveyed by the pulling conveyor 24 between a pair of shoulder alignment chains 71, and presses the shoulders of the bulb portion 2a of the garlic 2 by the pair of shoulder alignment chains 71, thereby aligning the height position of the bulb portion 2a to a predetermined height position. That is, the shoulder alignment device 25 positions the bulb portion 2a below a pair of shoulder alignment chains 71 disposed at a gentle inclination with respect to the conveying chain 61 of the pulling conveyor 24, and as the garlic 2 is conveyed by the pulling conveyor 24, the pair of shoulder alignment chains 71 are brought into contact with both shoulders of the bulb portion 2a to lock the garlic 2 being conveyed in the upward movement, and align the height position of the garlic 2 in a handling manner together with the pulling conveyor 24 (see the arrow B1 indicating the movement of the bulb portion 2a in FIG. 7).

[0066] The handling action on the garlic 2, that is, the locking action of the garlic 2 by the alignment device 25, is obtained by a pair of conveying chains 61 and a pair of alignment chains 71 of the alignment device 25. The garlic 2 with its height position aligned is guided to the rear foliage cutting device 26.

[0067] The foliage cutting device 26 is provided above the rear part of the alignment device 25 and is located below the rear end of the extraction conveying device 24. The foliage cutting device 26 is a cutting device for cutting the foliage part 2b of the garlic 2 conveyed by the extraction conveying device 24 and separating and dropping the bulb part 2a from the foliage part 2b. The foliage cutting device 26 cuts the foliage part 2b of the garlic 2 whose position has been aligned (the heights of the shoulders are aligned) by the alignment device 25 so that the foliage part 2b remains on the bulb part 2a side with a substantially constant length.

[0068] The foliage cutting device 26 has a pair of disk-shaped rotary blades 88. The pair of rotary blades 88 are respectively provided coaxially with the rear driven sprockets 73 of the left and right chain carriers 70 of the alignment device 25. The rotary blade 88 is supported and fixed to the foliage cutter shaft 134 which is the support shaft of the rear driven sprocket 73 and extends upward from the rear driven sprocket 73, and is provided parallel to the rear driven sprocket 73 above the rear driven sprocket 73. The rotary blade 88 rotates integrally with the rear driven sprocket 73. The pair of rotary blades 88 are arranged vertically close to each other with their outer edge portions overlapping, and are provided substantially symmetrically about the movement path of the garlic 2 between the left and right chain carriers 70 in the left-right direction.

[0069] As the transporting action by the extraction transporting device 24, the garlic 2 moving obliquely upward to the rear is guided to a position between the left and right rotary blades 88 in a state where it is locked against upward movement by the shoulder alignment device 25 and positioned in the vertical direction. The foliage part 2b located between the pair of chain carriers 70 of the shoulder alignment device 25 reaches the overlapping part of the left and right rotary blades 88 and is cut by the rotating rotary blades 88. The bulb part 2a separated from the foliage part 2b by the pair of rotary blades 88 drops onto the conveyor 7 and is guided to a predetermined location. Further, the foliage part 2b separated from the bulb part 2a is discharged to a predetermined location by the foliage discharging device 28.

[0070] The root cutting device 27 is provided below each chain carrier 70 constituting the shoulder alignment device 25. The root cutting device 27 cuts the root part 2c of the garlic 2 that is receiving the alignment action by the shoulder alignment device 25. The root cutting device 27 has a pair of disk-shaped rotary blades 165 on the left and right.

[0071] The pair of rotary blades 165 are arranged vertically in a state where their outer edge parts overlap each other, and are provided substantially symmetrically about the movement path of the garlic 2 between the left and right chain carriers 70 in the left-right direction. Each rotary blade 165 is fixedly provided at the lower part of the shoulder alignment drive shaft 85. That is, the rotary blade 165 is provided coaxially with the drive sprocket 72 and rotates integrally with the drive sprocket 72 and the shoulder alignment drive shaft 85. The rotary blade 165 is provided along a plane perpendicular to the axial direction of the shoulder alignment drive shaft 85.

[0072] In the above configuration, the left and right rotary blades 165 of the root cutting device 27 are rotationally driven by the rotational power of the alignment drive shaft 85 that rotationally drives the alignment chain 71. As the garlic 2 moves obliquely upward to the rear due to the conveying action of the extraction conveying device 24, it is locked by the alignment device 25 with respect to the upward movement and positioned in the vertical direction, and is guided to the position between the left and right rotary blades 165. Then, the root part 2c of the garlic 2 reaches the overlapping part of the left and right rotary blades 165 and is cut by the rotating rotary blades 165. The root part 2c separated from the bulb part 2a by the pair of rotary blades 165 falls onto the field.

[0073] The leaf discharging device 28 is a device that conveys the foliage part 2b separated from the bulb part 2a in the foliage cutting device 26 to the rear and discharges it onto the leaf discharging conveyor 9. The leaf discharging device 28 is provided on the rear side of the extraction conveying device 24 so as to form a state where it has substantially the same inclination as the extraction conveying device 24 in a side view and extends the extraction conveying device 24 to the rear side.

[0074] The leaf discharging device 28 constitutes a chain conveying mechanism for conveying the foliage part 2b by a pair of left and right leaf discharging chain carriers 90. The leaf discharging device 28 aligns the conveying direction of the foliage part 2b along the conveying direction by the left and right chain clamping bodies 60 in the extraction conveying device 24.

[0075] The leaf discharging chain carrier 90 has a drive sprocket 92 provided at the conveying start end (front end), a driven sprocket 93 provided at the conveying end (rear end), and an endless leaf discharging chain 91 wound around these sprockets (see FIG. 6). The leaf discharging device 28 is configured to rotate the left and right leaf discharging chains 91 in a direction that moves the opposing sides backward, and to sandwich and convey the foliage part 2b between the left and right leaf discharging chains 91.

[0076] As shown in FIG. 6, the drive sprocket 92 of the leaf discharging chain conveyor 90 is fixed to the conveying input shaft 65, and each leaf discharging chain conveyor 90 receives the transmission of the power of the conveying input shaft 65 and is driven together with the pulling conveyor 24. The drive sprocket 92 is provided below the drive sprocket 62 of the pulling conveyor 24 on the conveying input shaft 65.

[0077] According to the leaf discharging device 28 having the above-described configuration, the foliage part 2b held by the pulling conveyor 24 is taken over (transferred) by the leaf discharging device 28 and conveyed rearward and upward while being held between the pair of leaf discharging chains 91. The foliage part 2b conveyed by the leaf discharging device 28 is discharged at the terminal end of the leaf discharging device 28. The foliage part 2b discharged by the leaf discharging device 28 falls onto the leaf discharging conveyor 9 and is conveyed rightward by the leaf discharging conveyor 9 and discharged to the field.

[0078] [Power Transmission Configuration of Vegetable Harvester] The power transmission configuration in the vegetable harvester 1 according to the present embodiment will be described with reference to FIGS. 5 and 6. Note that FIG. 6 is a partially enlarged view of FIG. 5 and shows the power transmission configuration for the conveying and cutting unit 40. Further, in the description of the power transmission configuration, the "belt transmission mechanism" is a transmission mechanism including a pulley provided on a rotating shaft and a belt wound around the pulley, and the "chain transmission mechanism" is a transmission mechanism including a sprocket provided on a rotating shaft and a chain wound around the sprocket.

[0079] As shown in FIG. 5, the rotational driving force of the output shaft 10a of the engine 10 is input to the first countershaft 102 provided with the left-right direction as the axial direction by the first belt transmission mechanism 101. The power of the engine 10 is transmitted via the first countershaft 102 to the traveling drive system that drives the crawler traveling device 4 and the vehicle speed synchronized work drive system that transmits a driving force synchronized with the vehicle speed to drive a predetermined work unit, and the power is divided into the power transmitted to the vehicle speed non-synchronized work drive system that transmits a driving force not synchronized with the vehicle speed (independent of the vehicle speed) to drive a predetermined work unit. According to the vehicle speed non-synchronized work drive system, a constant rotational driving force based on the rated output of the engine 10 is transmitted.

[0080] (Traveling drive system) The traveling drive system will be described. The rotational power of the first countershaft 102 is transmitted to the input shaft of the transmission 11 via the HST 140 by the second belt transmission mechanism 105. Here, "HST" is a hydrostatic transmission that adopts a method of converting the hydraulic pressure generated by driving a hydraulic pump back into a rotational force by a hydraulic motor.

[0081] The HST 140 has a variable displacement type hydraulic pump 141 and a hydraulic motor 142 that are connected to each other via an oil passage and constitute a common hydraulic circuit. The HST 140 has an input shaft 143 that receives the input of rotational power by the second belt transmission mechanism 105, a first output shaft 144 that is connected to the input shaft of the transmission 11, and a second output shaft 145 for driving the work unit.

[0082] The second belt transmission mechanism 105 is provided with a traveling clutch 106 that is operated by a traveling clutch lever provided in the operation unit 5. The rotational power input from the first output shaft 144 to the input shaft of the transmission 11 is transmitted to the left and right axles 11b of the transmission 11 by the transmission mechanism of the transmission 11. Driving wheels 4a of the crawler traveling device 4 are attached to both ends of the axle 11b.

[0083] The HST140 has an operating shaft for traveling, and a shift lever (main shift lever) provided in the driver's cab 5 is interlocked and connected to the operating shaft via a transmission mechanism or the like. By operating the shift lever, the rotation driving operations of the first output shaft 144 and the second output shaft 145 are performed along with the driving of the hydraulic pump 141 and the hydraulic motor 142. That is, by operating the shift lever, the power of the engine 10 is transmitted to the first output shaft 144 and the second output shaft 145 via the hydraulic pump 141, the hydraulic motor 142, and the like.

[0084] In this way, in the HST140, while the power from the engine 10 is being transmitted, the adjustment drive of the hydraulic pump 141 is performed, and the drive of the hydraulic motor 142 by the adjustment drive of the hydraulic pump 141 is transmitted to the first output shaft 144 and the second output shaft 145. Then, the rotational speeds of the first output shaft 144 and the second output shaft 145 change synchronously with each other according to the operation amount (tilt angle) of the shift lever.

[0085] The traveling speed (vehicle speed) of the vehicle body is steplessly shifted by the change in the rotational speed of the first output shaft 144. Also, the rotational speed of the rotational drive of the vehicle speed synchronization work drive system changes in synchronization with the vehicle speed due to the change in the rotational speed of the second output shaft 145. The first output shaft 144 and the second output shaft 145 rotate forward and backward by operating a shift lever or the like. In this way, with the HST140, the power of the engine 10 is divided into the power transmitted to the traveling drive system and the power transmitted to the vehicle speed synchronization work drive system.

[0086] (Vehicle speed synchronization work drive system) The vehicle speed synchronization operation drive system will be described. The rotational power of the second output shaft 145 of the HST140 is input to the first intermediate shaft 108 provided with the left - right direction as the axial direction by the first chain transmission mechanism 107. The first chain transmission mechanism 107 is an HST synchronization chain transmission mechanism that performs power transmission synchronized with the drive of the HST140. The first intermediate shaft 108 rotates in the same direction as the rotational direction of the second output shaft 145. The rotational power of the first intermediate shaft 108 is transmitted to the second intermediate shaft 110 provided parallel to the first intermediate shaft 108 by the third belt transmission mechanism 109. The second intermediate shaft 110 serves as a digging and conveying drive input shaft for inputting the driving force to each device of the conveying and cutting unit 40 and the conveyors 7 and the discharge blade conveyor 9.

[0087] The third belt transmission mechanism 109 is configured to transmit rotational power only in a predetermined rotational direction to the second intermediate shaft 110. The pulley 109a provided at the left end of the first intermediate shaft 108 and constituting the third belt transmission mechanism 109 is connected to the first intermediate shaft 108 via a one - way clutch. Thereby, the pulley 109a receives rotational power only in a predetermined rotational direction and rotates with respect to the first intermediate shaft 108 that rotates forward and backward. The rotational direction of the pulley 109a is the clockwise (right - hand rotation) direction when viewed from the left side of the machine body.

[0088] The rotational power of the second intermediate shaft 110 is transmitted to the left - hand working unit input shaft 115 by the fourth belt transmission mechanism 113 provided on the left side of the machine body. The fourth belt transmission mechanism 113 is provided with a left - hand working clutch 114 which is a first working clutch operated by a working clutch lever provided in the operation unit 5.

[0089] A fifth belt transmission mechanism 117 including an input pulley 47 is provided between the left working unit input shaft 115 and the conveyor input shaft 45. The rotational power of the left working unit input shaft 115 is transmitted to the conveyor input shaft 45 by the fifth belt transmission mechanism 117. A pulley 116 that receives the winding of the belt together with the input pulley 47 in the fifth belt transmission mechanism 117 is fixedly installed at the left end of the left working unit input shaft 115. The rotational driving power of the conveyor input shaft 45 is transmitted to the conveyor driven shaft 46 by a chain transmission mechanism including the left and right chains 44, thereby driving the conveyor 7.

[0090] On the other hand, the rotational power of the left working unit input shaft 115 is input to a pre-treatment input shaft 120 provided with the axial direction in the left-right direction by a second chain transmission mechanism 119 including a sprocket 118 fixedly installed at a position to the right of the pulley 116 on the left working unit input shaft 115. An input sprocket 121 that receives the winding of the chain together with the sprocket 118 in the second chain transmission mechanism 119 is fixedly installed at the left end of the pre-treatment input shaft 120.

[0091] The rotational power of the pre-treatment input shaft 120 is transmitted to the conveyor input shafts 65 of the left and right chain holders 60 of each of the six conveying and cutting units 40. The rotational power of the pre-treatment input shaft 120 is transmitted to each conveyor input shaft 65 by an input side bevel gear 122 fixedly installed on the pre-treatment input shaft 120 and an output side bevel gear 123 fixedly installed at the lower end of each conveyor input shaft 65.

[0092] Regarding the input shafts 65 of the pair of left and right chain clamping bodies 60 in each conveying and cutting unit 40, the input shaft 65 of the left chain clamping body 60 is defined as the left input shaft 65L, and the input shaft 65 of the right chain clamping body 60 is defined as the right input shaft 65R. The connection modes of the input side bevel gears 122 and the output side bevel gears 123 of each shaft of the left input shaft 65L and the right input shaft 65R to the preprocessing input shaft 120 are symmetrical left and right. That is, the output side bevel gear 123 provided on the left input shaft 65L meshes with the input side bevel gear 122 from the left side, and the output side bevel gear 123 provided on the right input shaft 65R meshes with the input side bevel gear 122 from the right side.

[0093] The preprocessing input shaft 120 has a structure in which a left shaft 120a and a right shaft 120b, each forming half of the preprocessing input shaft 120, are connected. The left shaft 120a and the right shaft 120b are connected to each other by a connecting member 124 located at the central portion in the axial direction of the preprocessing input shaft 120 so as to rotate integrally. The connecting member 124 is a cylindrical member with both ends open, and is fixed to each shaft in a state where the right end portion of the left shaft 120a and the left end portion of the right shaft 120b are inserted, connecting these shafts to each other (see Fig. 17). The preprocessing input shaft 120 constitutes a shaft support portion 20 that rotatably supports the harvesting unit 6 with respect to the traveling body 3.

[0094] In the preprocessing input shaft 120 having such a configuration, the six input side bevel gears 122 for interlocking with the six input shafts 65 of the three left conveying and cutting units 40 are provided on the left shaft 120a. Also, the six input side bevel gears 122 for interlocking with the six input shafts 65 of the three right conveying and cutting units 40 are provided on the right shaft 120b.

[0095] In addition, the rotational power of the preprocessing input shaft 120 is transmitted to the conveyor drive shaft 39 via a bevel gear 126 fixed to the right end portion of the preprocessing input shaft 120 and a bevel gear 127 fixed to the front end portion of the conveyor drive shaft 39. Thereby, the drive roller 36 is rotationally driven and the discharge blade conveyor 9 is driven.

[0096] In each conveying and cutting unit 40, the rotational power of the left and right conveying input shafts 65 drives the chain clamping body 60 of the extraction conveying device 24, the chain conveyor body 70 of the alignment device 25, the rotary blade 88 of the foliage cutting device 26, the rotary blade 165 of the root cutting device 27, and the leaf discharge chain conveyor body 90 of the leaf discharge device 28 to rotate, driving each device.

[0097] As described above, in the vegetable harvester 1, the working units that receive the power transmission of the engine 10 by the vehicle speed synchronization working drive system and are driven in vehicle speed synchronization are each device such as the extraction conveying device 24 that constitutes the conveyor 7, the leaf discharge conveyor 9, and the conveying and cutting unit 40.

[0098] (Vehicle speed non-synchronization working drive system) The vehicle speed non-synchronization working drive system will be described. The rotational power of the first countershaft 102 that receives the power transmission of the engine 10 and rotates is transmitted to the double pulley 275 by the sixth belt transmission mechanism 128. The double pulley 275 is pivotally supported at the right end of the rotating support frame portion 211 that constitutes the working frame 30 to be described later, and is arranged coaxially with the left working unit input shaft 115 that constitutes the vehicle speed synchronization working drive system. Note that the double pulley 275 is not directly connected to the left working unit input shaft 115, and the double pulley 275 and the left working unit input shaft 115 are provided so as to rotate independently of each other.

[0099] The sixth belt transmission mechanism 128 is provided with a right working clutch 129 which is a second working clutch operated by a working clutch lever provided in the operation unit 5. The right working clutch 129 and the above-described left working clutch 114 are configured to be interlocked with each other, and the on (connection) / off (disconnection) of these clutches is switched by the operation of the working clutch lever.

[0100] The two-stage pulley 275 has a pulley portion as an input pulley 273 that constitutes the sixth belt transmission mechanism 128 and a pulley portion as a pulley 132 that constitutes the seventh belt transmission mechanism 131. The rotational power of the two-stage pulley 275 is transmitted to the digging drive shaft 56 by the seventh belt transmission mechanism 131. The digging device 23 is driven by the rotational power of the digging drive shaft 56. Further, the rotational power of the digging drive shaft 56 is transmitted to the reel rotation shaft 54 by a third chain transmission mechanism 135 including a sprocket 133 fixed to the right end portion of the digging drive shaft 56, and the scraping reel 21 is driven.

[0101] As described above, in the vegetable harvester 1, the working units that receive the power transmission of the engine 10 by the vehicle speed non-synchronized working drive system and are driven at a non-vehicle speed synchronized (constant speed) are the digging device 23 and the scraping reel 21.

[0102] [Floating Support Structure of Conveyor Cutting Unit] In the vegetable harvester 1 having the above-described configuration, the six conveyor cutting units 40 are divided into two units (support units) including three conveyor cutting units 40 in the left-right direction of the machine body with respect to their support structures. For each support unit, the ground height of the tip portion of the conveyor cutting unit 40 (the tip portion of the extraction conveyor device 24) is supported so as to be adjustable with respect to the traveling machine body 3.

[0103] That is, as shown in FIGS. 8 and 15, the six conveying and cutting units 40 provided rotatably about the elevating rotation axis O1 in the shaft support portion 20 as described above are divided into a left support unit 201 including the three left conveying and cutting units 40 and a right support unit 202 including the three right conveying and cutting units 40 as two support units supported integrally and rotatably. The left support unit 201 and the right support unit 202 are configured to be integrally rotatable independently of each other about the elevating rotation axis O1. In FIG. 8, the portions including the respective support units of the left support unit 201 and the right support unit 202 are each shown surrounded by a dashed line frame. Note that the number of support units, that is, the number of divisions of the six conveying and cutting units 40 is not particularly limited.

[0104] The six conveying and cutting units 40 are swingably supported with respect to the work frame 30 about the elevating rotation axis O1 which is a rotation axis provided at the rear portions of the six conveying and cutting units 40. That is, the shaft support portion 20 that supports the six conveying and cutting units 40 is provided on the work frame 30, and the elevating rotation axis O1 is arranged at a fixed position with respect to the work frame 30. Then, the left support unit 201 and the right support unit 202 are supported with respect to the work frame 30 by the shaft support portion 20 so as to rotate independently of each other about the elevating rotation axis O1.

[0105] (Configuration of Work Frame) The work frame 30 will be described with reference to FIGS. 1 to 4, 8, and 9. The work frame 30 is a frame that supports the six conveying and cutting units 40 with respect to the traveling body 3. The work frame 30 is configured by a frame member such as an angular steel pipe member or a pipe-shaped member having a linear shape or a predetermined bent shape or curved shape, and is arranged above the traveling body 3. The work frame 30 is configured to be substantially symmetric about the left and right as a whole.

[0106] The work frame 30 includes a rotation support frame portion 211, a pair of left and right upper frame portions 212, a pair of left and right lower frame portions 213, a front frame portion 214, and three cross-frame portions (215, 216, 217) installed between the left and right lower frame portions 213. The frame members constituting each frame portion are fixed to each other by welding or the like to form an integral work frame 30.

[0107] The rotation support frame portion 211 is a linear frame portion extending in the left-right direction and is constituted by a pipe-shaped member having a circular cross-sectional shape. The rotation support frame portion 211 is located at a position obliquely above and behind the discharge blade conveyor 9 and in front of the upper end portion of the conveyor 7.

[0108] The upper frame portion 212 is a frame portion having a convex bending shape upward so as to form a mountain shape in a side view and is constituted by a square steel pipe-shaped member having a rectangular cross-sectional shape. The upper frame portion 212 has a rear inclined portion 212a inclined upward in front and a front inclined portion 212b inclined downward in front as the portions forming the bending shape in a side view.

[0109] The upper frame portion 212 is provided so as to form a straight line along the front-rear direction in a plan view (see FIG. 2). The rear end portion of the upper frame portion 212 is connected to the rotation support frame portion 211, extends forward from the rotation support frame portion 211, is disposed above the six conveying and cutting units 40, and the front end portion is located above the front-rear intermediate portion of the conveying and cutting unit 40. Each of the left and right upper frame portions 212 is disposed at a position outside the conveyor 7 and inside the arrangement region of the six conveying and cutting units 40 in the left-right direction.

[0110] The lower frame portion 213 is a frame portion having a predetermined bent shape or curved shape in side view, and is composed of a rectangular steel pipe member. The lower frame portion 213, as a portion forming the side view shape, includes a rear inclined portion 213a that inclines downward and forward with a relatively steep gradient, an intermediate inclined portion 213b that inclines downward and forward with a relatively gentle gradient, and a front inclined portion 213c that inclines downward and forward so as to form a bent shape together with the intermediate inclined portion 213b. The corner between the rear inclined portion 213a and the intermediate inclined portion 213b is a curved portion 213d.

[0111] As members constituting the main part of the lower frame portion 213, the lower frame portion 213 has a rear frame member 213r which is a rectangular steel pipe member forming the rear portion of the lower frame portion 213, and a front frame member 213f which is a rectangular steel pipe member forming the front portion of the lower frame portion 213. At the intermediate inclined portion 213b of the lower frame portion 213, the front end portion of the rear frame member 213r and the rear end portions of the front frame members 213f located on the left and right outer sides thereof are fixed to each other by welding or the like.

[0112] The lower frame portions 213 are provided so as to form a straight line along the front-rear direction in plan view. Each lower frame portion 213 is connected to the rotation support frame portion 211 in a manner of passing through the left and right end portions of the rotation support frame portion 211 at the rear end portion, extends downward and forward from the rotation support frame portion 211, and is disposed below the conveyance cutting unit 40 and above the crawler traveling device 4 in side view, and the front end portion is positioned above the front end portion of the crawler traveling device 4. The left and right lower frame portions 213 are arranged at positions outside the upper frame portion 212 and outside the crawler traveling device 4 in the left-right direction.

[0113] The front frame portion 214 is a bent frame portion having a gate shape in front view, and is composed of a rectangular steel pipe member. The front frame portion 214, as a portion forming the gate shape, has a straight horizontal side portion 214a extending in the left-right direction, and straight vertical side portions 214b bent at right angles downward from both left and right ends of the horizontal side portion 214a.

[0114] The front frame portion 214 is provided so as to form a forwardly inclined straight line shape in side view. The front frame portion 214 connects the lower end portions of the left and right vertical side portions 214b to the front end portions of the left and right lower frame portions 213 respectively, and is erected in a forwardly inclined state while being installed between the left and right lower frame portions 213. The front frame portion 214 is provided so as to straddle six conveying and cutting units 40 in the left - right direction. The front frame portion 214 receives the connection of the front end portions of the left and right upper frame portions 212 at the horizontal side portion 214a.

[0115] The work frame 30 has, as three horizontally - spanning frame portions, a first horizontally - spanning frame portion 215, a second horizontally - spanning frame portion 216, and a third horizontally - spanning frame portion 217 in order from the rear side to the front side. Among these horizontally - spanning frame portions, the first horizontally - spanning frame portion 215 and the second horizontally - spanning frame portion 216 are installed between the intermediate inclined portions 213b of the left and right lower frame portions 213, and the third horizontally - spanning frame portion 217 is installed between the front portions of the forwardly inclined portions 213c that form the front end portions of the lower frame portions 213.

[0116] The first horizontally - spanning frame portion 215 is a straight - line - shaped frame portion extending in the left - right direction, and is composed of a square steel pipe - shaped member having a rectangular cross - sectional shape. The first horizontally - spanning frame portion 215 is provided in an inclined state in side view such that the upper surface portion 215a is a forwardly downwardly inclined surface in accordance with the forwardly downward inclination of the intermediate inclined portion 213b of the lower frame portion 213 (see FIG. 12).

[0117] The work frame 30 having the above - described configuration is supported so as to be rotatable about a frame rotation axis line O2 as a frame rotation axis with respect to the traveling body 3. The frame rotation axis line O2 is an axis parallel to the lifting rotation axis line O1 having the left - right direction of the machine body as the axial direction, is located obliquely rearward and upward of the lifting rotation axis line O1, and is located in front of the upper end portion of the conveyor 7 (see FIG. 4).

[0118] In the working frame 30, the frame rotation axis O2 coincides with the central axis of the rotation support frame portion 211 constituted by a pipe-shaped member. That is, the working frame 30 is provided in a state of being rotatably supported about the frame rotation axis O2 so that the front side is raised and lowered, with the rotation support frame portion 211 provided at the rear end thereof as a shaft support portion at a fixed position on the traveling body 3.

[0119] The working frame 30 is rotatably supported by frame support portions 230 provided on support columns 220 erected on a body frame 15 (see FIG. 4) constituting the traveling body 3 at portions near the left and right ends of the rotation support frame portion 211. The support columns 220 are arranged at left and right side positions of the conveyor 7 so as to position the upper portion of the conveyor 7 between them at the rear portion of the body frame 15.

[0120] The support columns 220 are erected on a horizontal predetermined support surface 221 (see FIG. 1) provided at a height position above the crawler traveling device 4 at the rear portion of the body frame 15. The support columns 220 are substantially square columnar portions having a rectangular shape with the longitudinal direction in the front-rear direction in plan view.

[0121] The support structure of the rotation support frame portion 211 by the left and right frame support portions 230 will be described with reference to FIGS. 10 and 11. The left and right frame support portions 230 have a common configuration. FIGS. 10 and 11 show the left frame support portion 230.

[0122] As shown in FIGS. 10 and 11, the frame support portion 230 is provided on a horizontal upper surface 220a having a rectangular shape with the longitudinal direction in the front-rear direction in plan view in the support column 220. The frame support portion 230 has a supported portion 211a at a portion near the left and right ends of the rotation support frame portion 211, a pedestal 231 that supports the supported portion 211a, and a fixing plate 232 that is fixed to the pedestal 231 and supports the supported portion 211a in a state of sandwiching it vertically together with the pedestal 231.

[0123] The receiving base 231 is provided in a state of being fixed to the upper surface 220a of the support column portion 220 by welding or the like. The receiving base 231 is a box-shaped portion with the longitudinal direction in the front-rear direction, has side surfaces on all four sides, and the upper surface portion serves as a receiving surface portion 233 for receiving the supported portion 211a of the rotation support frame portion 211. The receiving surface portion 233 is a surface portion having a rectangular outer shape in plan view, and the middle portion in the front-rear direction is a lower concave surface portion 234 forming a substantially semi-cylindrical concave surface 234a with the left-right direction as the cylinder axis direction.

[0124] The lower concave surface portion 234 is open on both the left and right sides and supports the supported portion 211a of the rotation support frame portion 211 in a fitted state. That is, the lower concave surface portion 234 serves as a receiving portion for receiving the supported portion 211a. The receiving surface portion 233 has horizontal flat portions 235 and 236 at both the front and rear sides of the lower concave surface portion 234, respectively.

[0125] The fixing plate 232 is detachably provided with respect to the receiving surface portion 233, and is fixed to the receiving surface portion 233 in a state of sandwiching the supported portion 211a of the rotation support frame portion 211 together with the receiving surface portion 233, thereby rotatably supporting the supported portion 211a. The fixing plate 232 is a plate-shaped member having a predetermined shape, and in a side view, has a shape that is line-symmetric with respect to the receiving surface portion 233 with a virtual plane passing through the frame rotation axis O2 and along which the front and rear flat portions 235 and 236 are located as the center line. The fixing plate 232 has a substantially rectangular outer shape in plan view, and the middle portion in the front-rear direction is an upper concave surface portion 237 forming a substantially semi-cylindrical concave surface 237a. The fixing plate 232, together with the lower concave surface portion 234 of the receiving surface portion 233, forms a substantially cylindrical peripheral surface portion along the outer shape of the supported portion 211a of the rotation support frame portion 211 by the upper concave surface portion 237. The fixing plate 232 has flat portions 238 and 239 at both the front and rear sides of the upper concave surface portion 237, which serve as mating surface portions for the flat portions 235 and 236, respectively.

[0126] The fixed plate 232 fits the supported portion 211a of the rotation support frame portion 211 into the upper concave surface portion 237, and in a state where the front and rear flat portions 238, 239 are respectively overlapped from above with the front and rear flat portions 235, 236 of the receiving surface portion 233, it is fixed to the receiving surface portion 233 at two locations in the front and rear by fixing bolts 240 passing through these flat portions. Each fixing bolt 240 passes through holes formed in the central portions of the front and rear flat portions of the receiving surface portion 233 and the fixed plate 232 respectively, and is screwed into nut portions 241 provided on the back side (lower side) of each flat portion 235, 236 of the receiving surface portion 233.

[0127] In this way, the left and right frame support portions 230 support the supported portions 211a on both the left and right ends of the rotation support frame portion 211 in a state of holding them from above and below by the receiving surface portion 233 of the pedestal 231 and the fixed plate 232 fixed thereto, and support them rotatably. The rotation support frame portion 211 is rotatably supported in the left and right frame support portions 230 such that the concave surface 234a of the lower concave surface portion 234 and the concave surface 237a of the upper concave surface portion 237 are sliding surfaces with respect to the outer peripheral surface 211b of the rotatable supported portion 211a. The rotation support frame portion 211 projects the left and right ends outward in the left and right directions from the support portions by the frame support portions 230.

[0128] As described above, the work frame 30 supports the rotation support frame portion 211 with respect to the left and right frame support portions 230, and is supported so as to be vertically rotatable about a frame rotation axis O2 that coincides with the central axis of the rotation support frame portion 211, so as to move the front side up and down with respect to the body frame 15 of the traveling machine body 3. The work frame 30 has a predetermined support portion with respect to the body frame 15 for the portion on the front side of the rotation support frame portion 211, and is supported in a state where this support portion is in contact with a predetermined portion of the body frame 15.

[0129] The work frame 30 is provided so as to rotate with respect to the body frame 15 by the telescopic operation of two lifting cylinders 250 (see FIGS. 3 and 12) provided on both the left and right sides of the body. The left and right lifting cylinders 250 are symmetrically arranged in the left-right direction and are supported in a similar manner including the support configuration with respect to the body frame 15. Note that FIG. 12 is a left side view showing the left lifting cylinder 250.

[0130] The two lifting cylinders 250 are provided at positions outside the left and right of the conveyor 7 in the left-right direction, positions overlapping the crawler traveling device 4 in plan view, and positions substantially the same as the support column portion 220. The lifting cylinder 250 is provided at a position between the support column portion 220 and the first horizontal frame portion 215 of the work frame 30 in the front-rear direction.

[0131] As shown in FIG. 12, the lifting cylinder 250 is provided in a state of being installed longitudinally between the horizontal frame portion 245 of the body frame 15 and the first horizontal frame portion 215 of the work frame 30. The horizontal frame portion 245 is composed of a square steel pipe member and extends linearly along the left-right direction. The horizontal frame portion 245 is located in front of and below the support column portion 220.

[0132] The lifting cylinder 250 is a hydraulic cylinder and has a cylinder tube 251 and a piston rod 252 having a piston at one end and slidably provided in the cylinder tube 251 via the piston. The lifting cylinder 250 is provided with the cylinder tube 251 side as the rear side and the piston rod 252 side as the front side, so that the telescopic direction is along the front-rear direction in plan view and the longitudinal direction (telescopic direction) is the inclined direction of downward slope to the rear.

[0133] The lifting cylinder 250 pivotally connects the rear end portion of the cylinder tube 251 to the rear bracket portion 246 fixed to the front side of the horizontal frame portion 245 via a rear shaft support portion 253 so as to be rotatable in the left - right direction with the rotation axis direction. The rear bracket portion 246 is composed of a bent plate - shaped member that is substantially U - shaped in front view, and the rear shaft support portion 253 is installed between the left and right side surface portions 246a.

[0134] The lifting cylinder 250 pivotally connects the tip end portion of the piston rod 252 to the front bracket portion 247 fixed to the rear side of the first horizontal cross - frame portion 215 of the work frame 30 via a front shaft support portion 254 so as to be rotatable in the left - right direction with the rotation axis direction. The front bracket portion 247 is composed of a pair of left - right plate - shaped support arms 247a extending rearward from the rear surface portion 215b of the first horizontal cross - frame portion 215, and the front shaft support portion 254 is installed between the tip end portions of the left and right support arms 247a.

[0135] In the configuration as described above, due to the telescopic operation of the left and right lifting cylinders 250, the work frame 30 and the devices supported by the work frame 30 integrally move up and down and rotate with the frame rotation axis O2 as the rotation center. Note that the left and right lifting cylinders 250 operate in a telescopic manner synchronously with each other.

[0136] Among the shaft - supported portions of the work frame 30 by the left and right frame support portions 230, in the shaft - supported portion on the left side, the following configuration is provided. As shown in FIGS. 10, 11, and 13, in the shaft - supported portion of the left - hand frame support portion 230, the above - mentioned left - hand work - section input shaft 115 (see FIG. 5) is arranged within a rotation - support frame portion 211 that is rotatably supported with respect to the frame support portion 230.

[0137] The left - hand work - section input shaft 115 is arranged coaxially with the rotation - support frame portion 211 and is rotatably supported via bearings 261 and 262 provided at two locations with respect to the rotation - support frame portion 211. The bearings 261 and 262 penetrate the left - hand work - section input shaft 115 and support the left - hand work - section input shaft 115 with respect to the inner peripheral surface 211c of the rotation - support frame portion 211.

[0138] One of the bearings 261 that supports the input shaft 115 of the left working section is provided near the right end of the input shaft 115 of the left working section. Note that the right end of the input shaft 115 of the left working section is positioned inside the supported portion 211a of the rotation support frame portion 211 by the frame support portion 230. The other bearing 262 is provided at the open end of the left end of the rotation support frame portion 211 protruding leftward from the frame support portion 230.

[0139] As shown in FIG. 13, the left working section input shaft 115 has a left portion extending leftward from the left end of the rotation support frame portion 211, serving as the left extension portion 115a. On the left extension portion 115a of the left working section input shaft 115, in order from the right side to the left side, an input pulley 263 constituting the above-described fourth belt transmission mechanism 113, a sprocket 118 constituting the second chain transmission mechanism 119, and a pulley 116 constituting the fifth belt transmission mechanism 117 are arranged. These input pulley 263, sprocket 118, and pulley 116 are provided so as not to be relatively rotatable with respect to the left working section input shaft 115 and rotate integrally with the left working section input shaft 115.

[0140] The output pulley 265 that receives the winding of the belt 264 together with the input pulley 263 in the fourth belt transmission mechanism 113 is positioned slightly below and behind the input pulley 263 and is provided in a state of being supported on the support surface 221 of the machine body frame 15 (see FIG. 3). Also, the input sprocket 121 that receives the winding of the chain 266 together with the sprocket 118 in the second chain transmission mechanism 119 is positioned in front and below the sprocket 118. The second chain transmission mechanism 119 including the sprocket 118 is provided in a chain case 268 arranged on the left side of the traveling machine body 3. The chain case 268 is configured in a flat box shape with a thick plate having the extending direction of the second chain transmission mechanism 119 as the longitudinal direction and the left-right direction as the thickness direction.

[0141] In addition, in the fifth belt transmission mechanism 117, the input pulley 47 that receives the winding of the belt 269 together with the pulley 116 is located behind and below the pulley 116. The input pulley 47 is fixedly provided at the left end of the conveyor input shaft 45 that extends leftward from the upper end of the conveyor 7. The left side portion of the conveyor input shaft 45 is rotatably supported via a bearing within a pipe-shaped support cylinder 270. The support cylinder 270 is fixedly provided on the body frame 15 by a support stay 271 or the like that extends rearward from the rear side of the support column portion 220.

[0142] On the other hand, among the shaft support portions of the work frame 30 by the left and right frame support portions 230, the following configuration is provided in the shaft support portion on the right side. As shown in FIG. 14, the rotation support frame portion 211 has a right extension portion 211d that extends rightward from the right frame support portion 230, and the pulley 132 of the seventh belt transmission mechanism 131 and the input pulley 273 of the sixth belt transmission mechanism 128 are rotatably supported on this right extension portion 211d.

[0143] The input pulley 273 is provided on the right side of the pulley 132. The pulley 132 and the input pulley 273 are fixed to each other at a plurality of locations by bolts 274 and constitute a two-piece pulley 275 that rotates integrally. The pulley 132 and the input pulley 273 are rotatably supported as a two-piece pulley 275 that rotates integrally, with the right end portion of the rotation support frame portion 211 as the support shaft portion. Note that at the right extension portion 211d of the rotation support frame portion 211, the upper end portion of the lower frame portion 213 of the work frame 30 is fixedly provided at a portion leftward of the two-piece pulley 275.

[0144] The pulley 132 and the input pulley 273 are arranged coaxially with the rotation support frame portion 211 and are rotatably supported via bearings 276 and 277 provided according to each pulley with respect to the rotation support frame portion 211. The bearings 276 and 277 penetrate the rotation support frame portion 211 and support the pulley 132 and the input pulley 273 with respect to the outer peripheral surface 211b of the rotation support frame portion 211.

[0145] One of the bearings 276 provided for the pulley 132 is provided near the right end of the rotation support frame portion 211. The other bearing 277 provided for the input pulley 273 is provided at the open end of the right end of the rotation support frame portion 211.

[0146] As shown in FIGS. 5 and 14, the belt 278 that constitutes the seventh belt transmission mechanism 131 together with the pulley 132 is wound around a pulley 279 supported by the digging drive shaft 56 located in front of the machine body. The belt 278 extends substantially downward from the pulley 132, engages with a plurality of pulleys (not shown) such as a tension pulley disposed below the pulley 132, extends forward in a bent shape, and is wound around the pulley 279. It is arranged along the lower frame portion 213 on the right side so as to form a substantially L shape when viewed from the right side of the machine body.

[0147] The output pulley 281 that receives the winding of the belt 280 together with the input pulley 273 in the sixth belt transmission mechanism 128 is located below the input pulley 273. An input pulley 282 is fixedly provided at the right end of the first countershaft 102 that supports the output pulley 281.

[0148] The input pulley 282 is a pulley that receives the winding of the belt 284 together with the output pulley 283 supported by the output shaft 10a of the engine 10 in the first belt transmission mechanism 101. Both the input pulley 282 and the output pulley 285 (see FIGS. 4 and 5) provided at the left end of the first countershaft 102 and constituting the second belt transmission mechanism 105 serve as HST drive pulleys. Also, in the second belt transmission mechanism 105, the pulley 286 that receives the winding of the belt 287 together with the output pulley 285 serves as an HST input pulley (see FIGS. 4 and 5).

[0149] (Support configuration of the left and right support units) As shown in FIG. 15, the left support unit 201 and the right support unit 202, which are rotatably provided about the lifting rotation axis O1 as described above, respectively constitute the shaft support portion 20 and have the left shaft case portion 301 and the right shaft case portion 302 that house the pre-treatment input shaft 120 as support bases. The left support unit 201 and the right support unit 202 are configured to be symmetric or substantially symmetric about the left and right, including the support configuration with respect to the work frame 30.

[0150] The left shaft case portion 301 and the right shaft case portion 302 are substantially cylindrical portions extending in the left-right direction, are substantially continuous with each other in the left-right direction, and constitute an integral pre-treatment input shaft case 300 that houses the pre-treatment input shaft 120. The pre-treatment input shaft case 300 is located above the first horizontal frame portion 215 that constitutes the work frame 30.

[0151] In the shaft support portion 20, the lifting rotation axis O1 coincides with the axis of the pre-treatment input shaft 120 housed in the pre-treatment input shaft case 300. The pre-treatment input shaft 120 is concentrically arranged with the cylindrical main body portion of the pre-treatment input shaft case 300 and is rotatably supported via bearings 303 provided at a plurality of locations with respect to the pre-treatment input shaft case 300. The bearing 303 penetrates the pre-treatment input shaft 120 and supports the pre-treatment input shaft 120 with respect to the inner peripheral surface, which is the cylindrical surface of the pre-treatment input shaft case 300.

[0152] Specifically, in a configuration where the left shaft 120a and the right shaft 120b are connected to each other by a connecting member 124 at the central portion in the axial direction of the pre-treatment input shaft 120, the left shaft 120a is provided in the left shaft case portion 301, and the right shaft 120b is provided in the right shaft case portion 302. And the pre-treatment input shaft 120 is supported by bearings 303 provided at three locations, namely, both end portions and an intermediate portion in the left-right direction, with respect to each of the left shaft case portion 301 and the right shaft case portion 302.

[0153] In each of the left shaft case portion 301 and the right shaft case portion 302, the bearing 303 provided at the inner end portion in the left - right direction supports a connecting member 124 that connects both the left shaft 120a and the right shaft 120b of the pre - processing input shaft 120 to each other with respect to each case portion (see Fig. 17). Also, in each of the left shaft case portion 301 and the right shaft case portion 302, the bearing 303 provided at the intermediate portion in the left - right direction is arranged, in the left - right direction, between the outer set and the central (second from the outside) set of the three pairs of conveying input shaft cases 66 in each of the support units 201, 202 (see Fig. 15).

[0154] As shown in Fig. 15, each of the pair of conveying input shaft cases 66 houses a left conveying input shaft 65L and a right conveying input shaft 65R respectively, communicates with the left shaft case portion 301 or the right shaft case portion 302 at the lower side, and extends obliquely forward and upward from each case portion (see Figs. 16 and 18). In the present embodiment, the conveying input shaft 65 and the conveying input shaft case 66 extend in a direction forming an inclination angle of about 50 to 60° with respect to the horizontal direction in a side view.

[0155] Each conveying input shaft case 66 is fixed to a mounting base portion 304 provided so as to protrude forward and above with respect to the cylindrical main body portion in each of the left shaft case portion 301 and the right shaft case portion 302. The mounting base portion 304 is provided at three locations corresponding to the three pairs of conveying input shaft cases 66 in each case portion. The mounting base portion 304 forms a mounting surface 304a along a surface perpendicular to the axial direction of the conveying input shaft 65 in a side view (see Figs. 18 and 20). The conveying input shaft case 66 has a substantially rectangular plate - shaped flange portion 66a at the lower end portion, and in a state where the flange portion 66a is aligned with the mounting surface 304a of the mounting base portion 304, it is fastened and fixed to the mounting base portion 304 by bolts 305 at the four corner portions of the flange portion 66a.

[0156] For each of the left shaft case portion 301 and the right shaft case portion 302, three pairs of transfer input shaft cases 66, that is, six transfer input shaft cases 66 are attached. Below each mounting base portion 304 in each case portion, a pair of input side bevel gears 122 that mesh with the output side bevel gears 123 fixed to the lower ends of the shafts of a pair of transfer input shafts 65 are provided for the preprocessing input shaft 120 in a left-right symmetric arrangement as described above.

[0157] The left shaft case portion 301 and the right shaft case portion 302 are supported so as to be rotatable about a lifting rotation axis O1 independently of each other with respect to the first horizontal frame portion 215 of the work frame 30. The left shaft case portion 301 is supported by a left shaft case support portion 311 and a central shaft case support portion 310 so as to be rotatable about the lifting rotation axis O1 with respect to the first horizontal frame portion 215. The right shaft case portion 302 is supported by the central shaft case support portion 310 and a right shaft case support portion 312 so as to be rotatable about the lifting rotation axis O1 with respect to the first horizontal frame portion 215. That is, the left shaft case portion 301 and the right shaft case portion 302 are supported so that the left and right outer ends can be rotated by the left shaft case support portion 311 and the right shaft case support portion 312 respectively, and the left and right inner ends are supported so as to be rotatable by a common central shaft case support portion 310.

[0158] The central shaft case support portion 310 will be described with reference to FIGS. 15 to 18. FIG. 18 is a side cross-sectional view taken at the B-B position in FIG. 15.

[0159] As shown in FIGS. 15 to 18, the central shaft case support portion 310 includes a support bracket 321 fixed to the first horizontal frame portion 215, a case support member 322 fixed on the support bracket 321, and a fixing plate 323 that sandwiches the left and right inner ends of the left shaft case portion 301 and the right shaft case portion 302 together with the case support member 322. The central shaft case support portion 310 is configured symmetrically in the left-right direction. In FIG. 17, the illustration of the fixing plate 323 is omitted.

[0160] The support bracket 321 is composed of a bent plate-shaped member that forms a substantially inverted U shape when viewed from the front. As a substantially inverted U-shaped surface portion, it has an upper surface portion 321a and left and right side surface portions 321b. The support bracket 321 is provided in an inclined state with respect to the horizontal direction so that the upper surface portion 321a is parallel to the upper surface portion 215a of the first transverse frame portion 215. The support bracket 321 is provided in a state of protruding forward and backward from the first transverse frame portion 215.

[0161] On the left and right side surface portions 321b of the support bracket 321, there are notch-shaped recesses 321c that follow the rectangular cross-sectional shape of the first transverse frame portion 215 and are open at the lower side. The recess 321c has side portions along the respective surface portions of the upper surface portion 215a, the rear surface portion 215b, and the front surface portion 215c of the first transverse frame portion 215. The support bracket 321 is fixed to the first transverse frame portion 215 by welding or the like in a state where the upper portion of the first transverse frame portion 215 is fitted into the recesses 321c of the left and right side surface portions 321b.

[0162] The case support member 322 has a flat rectangular plate-shaped mounting plate portion 324, cylindrical boss portions 325 provided at two locations in the front and rear on the mounting plate portion 324, a support plate portion 326 provided between the front and rear boss portions 325, and a receiving surface portion 327 provided above the front and rear boss portions 325 and the support plate portion 326. The case support member 322 is provided as an integral member including these portions.

[0163] The mounting plate portion 324 has substantially the same outer dimensions as the upper surface portion 321a of the support bracket 321. The front and rear boss portions 325 are provided in a manner of standing upright on the mounting plate portion 324, and in a direction along the front-rear direction in plan view and along the inclination of the upper surface portion 321a of the support bracket 321 in side view (the direction indicated by the arrow F1 in Fig. 18, hereinafter referred to as the "front-rear inclination direction"), they are located on both sides with respect to the supported portions of the left shaft case portion 301 and the right shaft case portion 302 in the central shaft case support portion 310. The boss portion 325 has a screw hole 325a opened upward at its central shaft portion (see Fig. 18). The support plate portion 326 is a plate-shaped portion with the left-right direction as the plate thickness direction, and is provided in a manner of being installed between the front and rear boss portions 325 on the mounting plate portion 324.

[0164] The receiving surface portion 327 is a portion for receiving the inner supported portions 301a and 302a which are the left and right inner opening end portions of the left shaft case portion 301 and the right shaft case portion 302 (see Fig. 17). Note that bearings 303 for supporting the connecting member 124 are arranged on the respective inner supported portions 301a and 302a. The receiving surface portion 327 is a surface portion having a rectangular outer shape with the front-rear inclination direction as the longitudinal direction in plan view, and the middle portion in the front-rear inclination direction is formed as a lower concave surface portion 328 having a substantially semi-cylindrical concave surface 328a with the left-right direction as the cylindrical axis direction.

[0165] The lower concave surface portion 328 is open on both the left and right sides, and supports the inner supported portions 301a and 302a of the left shaft case portion 301 and the right shaft case portion 302 in a fitted state. That is, the lower concave surface portion 328 serves as a receiving portion for receiving the inner supported portions 301a and 302a. The receiving surface portion 327 forms the front and rear both-side portions of the lower concave surface portion 328 as flat plane portions 329 and 330 respectively.

[0166] The support bracket 321 has the upper surface of the upper surface portion 321a as an attachment surface 321d along the front-rear inclination direction in a side view. The case support member 322 is fastened and fixed to the support bracket 321 by bolts 331 at two locations on both sides in the front-rear inclination direction at the left and right central portions in a state where the attachment plate portion 324 is aligned with the attachment surface 321d of the support bracket 321. The bolt 331 passes through the attachment plate portion 324 and the upper surface portion 321a and is screwed into a nut portion 332 provided on the back side (lower side) of the upper surface portion 321a.

[0167] The fixing plate 323 is detachably provided with respect to the receiving surface portion 327, and is fixed to the receiving surface portion 327 in a state of sandwiching the inner supported portions 301a and 302a of the left shaft case portion 301 and the right shaft case portion 302 together with the receiving surface portion 327, thereby rotatably supporting the inner supported portions 301a and 302a. The fixing plate 323 is a plate-shaped member having a predetermined shape, and in a side view, has a shape that is line-symmetric with respect to a virtual plane passing through the lifting rotation axis O1 and along which the front and rear flat portions 329 and 330 are located, with the virtual plane as the center line with respect to the receiving surface portion 327. The fixing plate 323 has a substantially rectangular outer shape in a plan view, and the intermediate portion in the front-rear direction is an upper concave surface portion 335 forming a substantially semi-cylindrical concave surface 335a. The fixing plate 323, together with the lower concave surface portion 328 of the receiving surface portion 327, forms a substantially cylindrical peripheral surface portion along the outer shapes of the inner supported portions 301a and 302a of the left shaft case portion 301 and the right shaft case portion 302 by the upper concave surface portion 335. The fixing plate 323 has flat portions 336 and 337 that are mating surface portions with respect to the front and rear flat portions 329 and 330 of the receiving surface portion 327, respectively, at both front and rear sides of the upper concave surface portion 335.

[0168] The fixing plate 323 fits the inner supported portions 301a and 302a of the left shaft case portion 301 and the right shaft case portion 302 into the upper concave surface portion 335, and in a state where the front and rear flat portions 336 and 337 are respectively overlapped with the front and rear flat portions 329 and 330 of the receiving surface portion 327 from above, the fixing plate 323 is fixed to the receiving surface portion 327 at two locations in the front and rear by fixing bolts 338 passing through these flat portions. Each fixing bolt 338 passes through holes formed at the central portions of the front and rear flat portions of the receiving surface portion 327 and the fixing plate 323, respectively, and is screwed into the screw hole 325a of the boss portion 325.

[0169] In this way, the central shaft case support portion 310 is rotatably supported in a state of sandwiching (clamping) the inner supported portions 301a and 302a of the left shaft case portion 301 and the right shaft case portion 302 from above and below by the receiving surface portion 327 of the case support member 322 and the fixing plate 323 fixed thereto. The left shaft case portion 301 and the right shaft case portion 302 are rotatably supported in the central shaft case support portion 310 such that the concave surfaces 328a of the lower concave surface portion 328 and the concave surfaces 335a of the upper concave surface portion 335 serve as sliding surfaces with respect to the outer peripheral surfaces 301b and 302b of the rotatable inner supported portions 301a and 302a. As shown in FIG. 17, in the central shaft case support portion 310, the left shaft case portion 301 and the right shaft case portion 302 face each other with the opening end faces 301c and 302c facing each other with a predetermined gap d1 therebetween.

[0170] The left shaft case support portion 311 and the right shaft case support portion 312 will be described with reference to FIGS. 15, 19, and 20. FIG. 20 is a side cross-sectional view taken at the C-C position in FIG. 15. Since the left shaft case support portion 311 and the right shaft case support portion 312 are symmetrically configured and have a common configuration, the left shaft case support portion 311 will be mainly described, and the description of the right shaft case support portion 312 will be omitted.

[0171] As shown in FIGS. 15, 19, and 20, the left shaft case support portion 311 includes a support bracket 341 fixed to the first transverse frame portion 215, a receiving base 342 fixed on the support bracket 341, and a fixing plate 343 that sandwiches the left and right outer ends of the left shaft case portion 301 (the right shaft case portion 302 in the right shaft case support portion 312) together with the receiving base 342.

[0172] The support bracket 341 has an upper surface portion 341a, an outer side surface portion 341b, an inner side surface portion 341c, a front surface portion 341d, a rear surface portion 341e, and a lower surface portion 341f, and is configured in a substantially rectangular parallelepiped shape by these surface portions. The support bracket 341 is provided in an inclined state with respect to the horizontal direction such that the upper surface portion 341a is parallel to the upper surface portion 215a of the first transverse frame portion 215. The support bracket 341 is provided in a state of protruding forward and backward from the first transverse frame portion 215.

[0173] The support bracket 341 has, on the inner side surface portion 341c, a notch-shaped recess 341g that follows the rectangular shape of the cross-sectional shape of the first transverse frame portion 215 and is open at the lower side. The recess 341g has side portions along the respective surface portions of the upper surface portion 215a, the rear surface portion 215b, and the front surface portion 215c of the first transverse frame portion 215. The support bracket 341 is fixed to the first transverse frame portion 215 by welding or the like in a state where the upper portion of the first transverse frame portion 215 is fitted into the recess 341g of the inner side surface portion 341c. The outer side surface portion 341b is located on the outer side in the left-right direction with respect to the first transverse frame portion 215.

[0174] Further, the support bracket 341 has a right-angled notch 341h on the front surface portion 341d, and the left and right inner upper portions of the front frame member 213f of the lower frame portion 213 of the work frame 30 are fitted into the notch 341h and fixed to the front frame member 213f by welding or the like. Similarly, the support bracket 341 has a right-angled notch 341j on the rear surface portion 341e, and the left and right inner upper portions of the rear frame member 213r of the lower frame portion 213 are fitted into the notch 341j and fixed to the rear frame member 213r by welding or the like. The support bracket 341 positions the lower surface portion 341f on both the front and rear sides of the first transverse frame portion 215 and fixes it to the front surface portion 215c and the rear surface portion 215b by welding or the like, respectively.

[0175] The receiving base 342 has a flat rectangular plate-shaped mounting plate portion 344, a support wall portion 345 composed of side surface portions on four sides, and a receiving surface portion 346 provided above the support wall portion 345. The receiving base 342 is provided as an integral member including these portions. The receiving base 342 is configured such that the entire support wall portion 345 and the receiving surface portion 346 are positioned within the outer shape range of the mounting plate portion 344 in a plan view. On the mounting plate portion 344, the receiving base 342 forms a box-shaped portion with the longitudinal direction being the front-rear inclination direction by the support wall portion 345 and the receiving surface portion 346.

[0176] The mounting plate portion 344 has substantially the same outer dimensions as the upper surface portion 341a of the support bracket 341. The support wall portion 345 has front, rear, left, and right side surface portions provided perpendicular to the mounting plate portion 344.

[0177] The receiving surface portion 346 is a portion for receiving the outer supported portion 301d which is the left and right outer end portions of the left shaft case portion 301 (the right shaft case portion 302 in the right shaft case support portion 312). Note that a bearing 303 for supporting the left end portion of the pre-treatment input shaft 120 is disposed on the outer side (left side) portion of the outer supported portion 301d. The receiving surface portion 346 is a surface portion having a rectangular outer shape with the longitudinal direction being the front-rear inclination direction in a plan view, and the middle portion in the front-rear inclination direction is a lower concave surface portion 347 forming a substantially semi-cylindrical concave surface 347a with the left-right direction being the cylindrical axis direction.

[0178] The lower concave surface portion 347 is open on both the left and right sides and supports the outer supported portion 301d of the left shaft case portion 301 in a fitted state. That is, the lower concave surface portion 347 serves as a receiving portion for receiving the outer supported portion 301d. The receiving surface portion 346 has flat plane portions 348 and 349 on both the front and rear sides of the lower concave surface portion 347, respectively.

[0179] The support bracket 341 has an upper surface of the upper surface portion 341a as a mounting surface 341k along the front-back inclination direction in a side view. The pedestal 342 is fastened and fixed to the support bracket 341 by bolts 350 at four locations at the four corners of the mounting plate portion 344 in a state where the mounting plate portion 344 is aligned with the mounting surface 341k of the support bracket 341. The bolt 350 passes through the mounting plate portion 344 and the upper surface portion 341a and is screwed into a nut portion 351 provided on the back side (lower side) of the upper surface portion 341a.

[0180] The fixing plate 343 is detachably provided with respect to the receiving surface portion 346, and is fixed to the receiving surface portion 346 in a state of sandwiching the outer supported portion 301d of the left shaft case portion 301 together with the receiving surface portion 346, thereby rotatably supporting the outer supported portion 301d. The fixing plate 343 is a plate-like member having a predetermined shape, and in a side view, has a shape that is line-symmetric with respect to a virtual plane passing through the elevating rotation axis O1 and along which the front and rear flat portions 348 and 349 are located, with the virtual plane as a center line, with respect to the receiving surface portion 346. The fixing plate 343 has a substantially rectangular outer shape in a plan view, and an intermediate portion in the front-back direction is an upper concave surface portion 352 forming a substantially semi-cylindrical concave surface 352a. The fixing plate 343, together with the lower concave surface portion 347 of the receiving surface portion 346, forms a substantially cylindrical peripheral surface portion along the outer shape of the outer supported portion 301d of the left shaft case portion 301 by the upper concave surface portion 352. The fixing plate 343 has flat portions 353 and 354 on both front and rear sides of the upper concave surface portion 352 as mating surface portions with respect to the front and rear flat portions 348 and 349 of the receiving surface portion 346, respectively.

[0181] The fixing plate 343 fits the outer supported portion 301d of the left shaft case portion 301 into the upper concave surface portion 352, and in a state where the front and rear flat portions 353 and 354 are respectively overlapped with the front and rear flat portions 348 and 349 of the receiving surface portion 346 from above, the fixing plate 343 is fixed to the receiving surface portion 346 at two locations in the front and rear by fixing bolts 355 passing through these flat portions. Each fixing bolt 355 passes through holes formed at the central portions of the front and rear flat portions of the receiving surface portion 346 and the fixing plate 343, respectively, and is screwed into a nut portion 356 provided on the back side (lower side) of each flat portion 348 and 349 of the receiving surface portion 346.

[0182] In this way, the left shaft case support portion 311 is rotatably supported in a state (clamped state) of holding the outer supported portion 301d of the left shaft case portion 301 from above and below by the receiving surface portion 346 of the receiving base 342 and the fixing plate 343 fixed thereto. The left shaft case portion 301 is rotatably supported in the left shaft case support portion 311 such that the concave surface 347a of the lower concave surface portion 347 and the concave surface 352a of the upper concave surface portion 352 serve as sliding surfaces with respect to the outer peripheral surface 301e of the rotatable outer supported portion 301d. The right shaft case support portion 312 rotatably supports the outer end portion of the right shaft case portion 302 as an outer supported portion in the same manner as the support mode of the left shaft case portion 301 in the left shaft case support portion 311.

[0183] As described above, the left support unit 201 and the right support unit 202 are configured to rotatably support the left shaft case portion 301 and the right shaft case portion 302 coaxially arranged in the shaft support portion 20 independently of each other, and are provided so as to be rotatable about the lifting rotation axis O1 for each support unit with respect to the work frame 30.

[0184] (Regarding the gauge wheel) The left support unit 201 and the right support unit 202 rotatably supported about the lifting rotation axis O1 as described above are supported by a gauge wheel 360 provided in front of each support unit with respect to the field surface G1 which is the ground of the field (see FIG. 3). The gauge wheel 360 is a ground wheel that determines the ground height (height of the conveyance inlet) of the front end portion of the conveyance cutting unit 40 constituting each support unit. That is, the gauge wheel 360 is provided so as to be height-adjustable with respect to the conveyance cutting unit 40, and is a ground wheel for vertical position adjustment for setting the clamping position (clamping height) of the foliage portion 2b by the pulling conveyance device 24 to an appropriate height.

[0185] As the gauge wheel 360 moves following the field surface G1, the vertical rotation about the vertical rotation axis O1 of the left support unit 201 and the right support unit 202 is accompanied, and the ground height of the conveyance cutting unit 40 constituting each support unit is maintained. That is, the left and right support units 201 and 202 are in a state of being independently and floatingly supported with respect to the field surface G1.

[0186] The gauge wheel 360 is provided inside the weeding body 22. That is, the weeding body 22 constitutes a cover body having a tapered shape for obtaining a weeding effect and forming a space portion 361 with the lower side opened, and the gauge wheel 360 is accommodated in the space portion 361 (see FIG. 22).

[0187] The gauge wheel 360 is rotatably supported in the space portion 361 with the left - right direction as the rotation axis direction. The gauge wheel 360 is a so - called pneumatic tire, and has a metal wheel body 360a and a rubber tire portion 360b provided around the wheel body 360a. However, the configuration of the gauge wheel 360 is not particularly limited.

[0188] In the present embodiment, in the configuration including seven weeding bodies 22, gauge wheels 360 are provided for the second, third, fifth, and sixth weeding bodies 22 from the left (see FIG. 8). The two gauge wheels 360 provided for the second and third weeding bodies 22 from the left become the gauge wheels 360 that support the left support unit 201 on the ground, and the two gauge wheels 360 provided for the fifth and sixth weeding bodies 22 from the left become the gauge wheels 360 that support the right support unit 202 on the ground.

[0189] The weeding body 22 and the gauge wheel 360 are provided in a state of being supported by a weeding body support portion 52 provided for a portion on the tip side of the pulling conveyance device 24 as described above. The configuration of the weeding body 22, the configuration of the weeding body support portion 52, and the support configuration of the gauge wheel 360 will be described with reference to FIGS. 21 to 23.

[0190] As shown in FIGS. 21 to 23, the grass dividing body 22 has left and right side cover portions 371 and an upper cover portion 372, both of which are plate-shaped portions having a predetermined shape, and these cover portions form a space portion 361 for accommodating the gauge ring 360 and constitute an integral cover body for covering the gauge ring 360. The grass dividing body 22 has a left-right symmetric or substantially left-right symmetric shape. In FIG. 21, the left side cover portion 371 and the upper cover portion 372 are shown by a two-dot chain line. Also, in FIG. 22, the illustration of the left side cover portion 371 is omitted.

[0191] The rear part of the side cover portion 371 is a side surface portion 371a that extends in the front-rear direction in a plan view with the plate thickness direction being the left-right direction, and the front part is an inclined surface portion 371b having a tapered shape in the grass dividing body 22. The inclined surface portion 371b has a convex curved surface shape on the outside that forms a linear bent portion (ridge line portion) that is inclined downward and forward in a side view from the rear end of the upper edge portion to the front end of the lower edge portion.

[0192] The left and right side cover portions 371 form a ridge line portion 373 that is inclined downward and forward in a side view by the front mating portion of the inclined surface portions 371b. A linear rod-shaped ridge line member 374 is provided on the ridge line portion 373 along the inclination of the ridge line portion 373. The ridge line portion 373 is the front edge portion of the grass dividing body 22.

[0193] In the side cover portion 371, a linear bent portion 371c that forms the boundary between the side surface portion 371a and the inclined surface portion 371b is formed. The bent portion 371c is a ridge line portion having a bent shape by the side surface portion 371a and the inclined surface portion 371b, and is along the inclined direction that is downward and forward in a side view, similar to the ridge line portion 373.

[0194] The left and right side cover portions 371 form the lower opening edge of the space portion 361 by the lower edge portion 371d of the side surface portion 371a and the lower edge portion 371e of the inclined surface portion 371b. The lower edge portion 371d of the side surface portion 371a is along a substantially horizontal direction, and the lower edge portion 371e of the inclined surface portion 371b is inclined in a slightly forward-upward direction (see Fig. 22). As shown in Fig. 22, in a side view, the gauge ring 360 positions substantially the whole except for the lower end portion within the formation region of the side surface portion 371a of the side cover portion 371 in the weed separating body 22. Therefore, in a side view, the lower end portion of the gauge ring 360 is exposed downward from the lower edge portions 371d of the left and right side cover portions 371.

[0195] The upper cover portion 372 is a horizontal surface portion and is provided so as to block most of the front side of the upper openings of the left and right side cover portions 371. The upper cover portion 372 has side portions along the upper edge portions of the side surface portion 371a and the inclined surface portion 371b of the left and right side cover portions 371 respectively, and a rear side portion 372a along the left-right direction, and has a substantially pentagonal shape by these side portions.

[0196] The weed separating body support portion 52 will be described. The weed separating body support portion 52 supports the weed separating body 22 and the gauge ring 360 integrally so that their vertical positions can be adjusted with respect to the pulling and conveying device 24. The weed separating body support portion 52 is provided for the weed separating body 22 arranged between adjacent pulling and conveying devices 24 in the left-right direction. The weed separating body support portion 52 has a fixed-side support portion 380 provided in a state fixed to the pulling and conveying device 24 side, and a lifting support portion 390 supported so as to be able to move up and down with respect to the fixed-side support portion 380. The weed separating body 22 and the gauge ring 360 are supported with respect to the lifting support portion 390.

[0197] The fixed-side support portion 380 has a mounting plate portion 381 forming a fixing portion with respect to the pulling and conveying device 24 side, an arm portion 382 extending forward from the mounting plate portion 381, and a guide support rod portion 383 extending downward from the tip end portion of the arm portion 382.

[0198] The mounting plate portion 381 is a rectangular plate-shaped portion with the longitudinal direction in the front-rear direction in plan view, and has a substantially U-shaped cross-sectional shape that is flat with the edges on both the left and right sides raised at right angles. The mounting plate portion 381 is fixed to the mounting portion 375 provided on the side of the pulling and conveying device 24 by fixing bolts 384 at its four corners.

[0199] The mounting portion 375 is composed of a bent plate-shaped member having a substantially inverted U-shaped cross-sectional shape with both the left and right sides bent at right angles downward, and is provided so as to straddle between the chain clamping bodies 60 located on the opposite side in a set of pulling and conveying devices 24 adjacent to each other in the left-right direction. The mounting portion 375 is fixedly provided to the chain case portion or the frame portion constituting each chain clamping body 60. The mounting portion 375 is provided on the upper side near the front end portion of the pulling and conveying device 24. The mounting portion 375 has a mounting surface portion 375a having substantially the same size as the mounting plate portion 381. The mounting surface portion 375a is an inclined surface portion along the inclination of the pulling and conveying device 24 in side view, and is along a plane perpendicular to the rotation axis direction of the driven sprocket 63 of the chain clamping body 60.

[0200] The mounting plate portion 381 is fixed to the mounting portion 375 at four locations by fixing bolts 384 that penetrate through the mounting plate portion 381 and the mounting surface portion 375a in a state of overlapping the mounting surface portion 375a of the mounting portion 375 from above. Each fixing bolt 384 is screwed into a nut portion 376 provided below the mounting portion 375 (see FIG. 22).

[0201] The arm portion 382 is composed of a square steel pipe-shaped member and extends linearly forward from the central portion of the mounting plate portion 381. The arm portion 382 positions the front end portion forward of the front end portion of the pulling and conveying device 24 in the front-rear direction. The guide support rod portion 383 is composed of a linear pipe member and is fixed to the arm portion 382 by welding or the like in a state where the upper portion penetrates through the arm portion 382.

[0202] The lifting support part 390 has a threaded rod part 391 that penetrates the arm part 382 in the vertical direction, a guide cylinder part 392 fixed to the threaded rod part 391 via left and right fixing plate parts 395, a weed separating body support stay part 393 that supports the weed separating body 22, and left and right gauge wheel support arm parts 394 that support the gauge wheel 360. These parts that make up the lifting support part 390 constitute an integral lifting body with respect to the arm part 382.

[0203] The threaded rod part 391 is a rod-shaped part extending in the vertical direction. The upper part is a threaded part 391a with a threaded surface formed on the outer peripheral surface, and the lower part is a prism support part 391b having a square prism-shaped outer shape. The threaded rod part 391 is provided in a state where the threaded part 391a is passed through a sleeve part 396 which is a cylindrical part provided near the tip of the arm part 382.

[0204] The sleeve part 396 is provided by passing a linear pipe member through the arm part 382 and fixing it by welding or the like on the rear side of the guide support rod part 383 in the arm part 382. Nuts 397 screwed onto the threaded part 391a are provided on both the upper and lower sides of the sleeve part 396. The sleeve part 396 is clamped by the upper and lower nuts 397 due to the screwing action of the threaded part 391a.

[0205] The guide cylinder part 392 is a cylindrical part with openings at the top and bottom, and is fixed to the prism support part 391b of the threaded rod part 391 by left and right fixing plate parts 395. The left and right fixing plate parts 395 are fixed to the prism support part 391b and the guide cylinder part 392 by welding or the like. The guide cylinder part 392 allows the guide support rod part 383 to be inserted movably in the axial direction (vertical direction).

[0206] The grass dividing body support stay part 393 has a fixed surface part 393a with the front-rear direction as the plate thickness direction, and a support surface part 393b bent forward from the upper end of the fixed surface part 393a. It is a bent plate-shaped part forming a substantially L shape by these surface parts. The grass dividing body support stay part 393 positions the fixed surface part 393a in front of the guide cylinder part 392 and the left and right fixed plate parts 395, and fixes the fixed surface part 393a to these parts by welding or the like.

[0207] The grass dividing body support stay part 393 has most of the front side of the support surface part 393b as a horizontally plate-shaped part, and supports the grass dividing body 22 in this horizontally plate-shaped part. The grass dividing body support stay part 393 supports the upper cover part 372 of the grass dividing body 22 from below by the support surface part 393b, and receives the fixing of the upper cover part 372 in the support surface part 393b.

[0208] The grass dividing body 22 is fixed to the support surface part 393 at two positions in the front-rear direction by fixing bolts 398 passing through the upper cover part 372 and the support surface part 393b in a state where the upper cover part 372 is overlapped on the support surface part 393b of the grass dividing body support stay part 393 from above. Each fixing bolt 398 is screwed into a nut part 399 provided on the back side (lower side) of the support surface part 393b.

[0209] The gauge wheel support arm part 394 is a plate-shaped part with the left-right direction as the plate thickness direction and extending obliquely forward and downward from the fixed surface part 393a of the grass dividing body support stay part 393. The left and right gauge wheel support arm parts 394 are located on the left and right outer sides of the grass dividing body support stay part 393, and are fixed to the grass dividing body support stay part 393 by welding or the like.

[0210] The left and right gauge wheel support arm portions 394 pivotally support a gauge wheel 360 by a gauge wheel support shaft 401 installed between the tip ends. The gauge wheel 360 penetrates a gauge wheel support shaft 401 fixed between the left and right gauge wheel support arm portions 394 at its center portion and is rotatably supported with respect to the gauge wheel support shaft 401. The gauge wheel support shaft 401 is configured by a shaft body portion located between the left and right gauge wheel support arm portions 394 and a rod-shaped female screw member having female screw portions with openings at both end sides. By receiving the screwing of a shaft bolt 402 passing through the gauge wheel support arm portions 394 from both end sides, it is fixed to the left and right gauge wheel support arm portions 394.

[0211] Hole portions 394a through which the shaft bolts 402 pass in the left and right gauge wheel support arm portions 394 are elongated holes with the vertical direction as the longitudinal direction. Thereby, the vertical support position of the gauge wheel support shaft 401 with respect to the left and right gauge wheel support arm portions 394, that is, the vertical position of the gauge wheel 360 can be adjusted. Note that an opening portion 371g for exposing the shaft bolt 402 is formed in a side surface portion 371a of a side cover portion 371 of the threshing body 22.

[0212] Also, in the lifting support portion 390, rod nuts 403 with openings at both ends are fixed at two locations in the vertical direction with the left - right direction as the longitudinal direction by welding or the like behind a prism support portion 391b of a screw rod portion 391. Bolts 404 passing through extending portions 371f extending rearward from side surface portions 371a of the left and right side cover portions 371 of the threshing body 22 are screwed into the rod nuts 403.

[0213] According to the threshing body support portion 52 having the above - described configuration, the vertical position of the lifting support portion 390 with respect to the arm portion 382 fixed to the pulling and conveying device 24 side is adjusted by the clamping position of the sleeve portion 396 by the upper and lower nuts 397 in the screw rod portion 391 (see FIG. 22, arrow H1). Thereby, the vertical positions of the threshing body 22 and the gauge wheel 360 fixedly supported by the lifting support portion 390 with respect to the pulling and conveying device 24 side are adjusted.

[0214] The lifting support portion 390 is positioned vertically with respect to the arm portion 382 by sandwiching the sleeve portion 396 vertically with the upper and lower nuts 397. Further, the lifting support portion 390 is restricted from rotating in the left-right direction about the screw rod portion 391 by the insertion portion of the guide support rod portion 383 into the guide cylinder portion 392.

[0215] As described above, the threshing body support portion 52 that supports the gauge wheel 360 and the gauge wheel 360 so as to be vertically position-adjustable with respect to the pulling and conveying device 24 side becomes a ground height adjustment mechanism provided for each of the left support unit 201 and the right support unit 202. That is, among the four gauge wheels 360, the two gauge wheels 360 on the left side and the threshing body support portion 52 that supports them become a ground height adjustment mechanism for adjusting the ground height of the three conveying and cutting units 40 that make up the left support unit 201, and the two gauge wheels 360 on the right side and the threshing body support portion 52 that supports them become a ground height adjustment mechanism for adjusting the ground height of the three conveying and cutting units 40 that make up the right support unit 202.

[0216] According to the ground height adjustment mechanism, by adjusting the vertical position of the gauge wheel 360 in the threshing body support portion 52, the height of the tip portions of the three conveying and cutting units 40 that make up each support unit 201, 202, that is, the height with respect to the field surface G1 at the conveying inlet of the pulling and conveying device 24, is adjusted for each support unit.

[0217] According to the floating support structure of the conveying and cutting unit as described above, the following operation can be obtained. In the field, there may be a height difference in the field surface G1 on both the left and right sides of the body of the vegetable harvester 1 due to the shape of the ridges and the terrain such as the slope of the ground. For example, FIG. 24 shows a case where the field surface G1a on the left side of the body is partially higher than the field surface G1b on the right side of the body.

[0218] As shown in Fig. 24, when the field surface G1a on the left side of the machine body is higher than the field surface G1b on the right side, due to the floating support structures of the left support unit 201 and the right support unit 202 respectively, with rotation about the lifting rotation axis O1 of each support unit 201, 202, the gauge wheel 360 (360A) of the left support unit 201 follows (contacts) the higher field surface G1a, and the gauge wheel 360 (360B) of the right support unit 202 follows (contacts) the lower field surface G1b. As a result, regarding the height of the inlet of the plurality of extraction and conveying devices 24 that make up each support unit 201, 202, for the left support unit 201, the height of the inlet with respect to the relatively high field surface G1a is maintained, and for the right support unit 202, the height of the inlet with respect to the relatively low field surface G1b is maintained.

[0219] Fig. 25 shows a case where, contrary to the case shown in Fig. 24, the field surface G1b on the right side of the machine body is partially higher than the field surface G1a on the left side of the machine body. Similarly in this case, due to the grounding action of the gauge wheels 360 of each support unit 201, 202, regarding the height of the inlet of each support unit 201, 202, for the left support unit 201, the height of the inlet with respect to the relatively low field surface G1a is maintained, and for the right support unit 202, the height of the inlet with respect to the relatively high field surface G1b is maintained.

[0220] As described above, the left support unit 201 and the right support unit 202 rise and fall and rotate independently about the lifting rotation axis O1 following the unevenness of the field surface due to the grounding action of the gauge wheels 360. As a result, for each support unit, the height of the inlet, that is, the clamping position of the foliage part 2b of the garlic 2, is maintained at an appropriate height.

[0221] In the floating support structures of the left and right support units 201 and 202, for the weed separating body 22 (22A) located at the center in the left - right direction (see Fig. 8), the structure of the weed separating body 22 itself and the support structure of the weed separating body 22 with respect to the pulling - out conveying device 24 are configured to allow a height difference due to rotation around the lifting rotation axis O1 of the left and right support units 201 and 202.

[0222] Specifically, as shown in Fig. 8, as the support structure of the weed separating body 22A with respect to the pulling - out conveying device 24, there are provided a weed separating body support portion 52A for the right - hand chain clamping body 60 (60A) that constitutes the third pulling - out conveying device 24 from the left, and a weed separating body support portion 52B for the left - hand chain clamping body 60 (60B) that constitutes the fourth pulling - out conveying device 24 from the left. Further, the weed separating body 22A has a split structure with the left weed separating body member 22x that mainly constitutes the left - hand portion of the weed separating body 22A and the right weed separating body member 22y that mainly constitutes the right - hand portion of the weed separating body 22A as split elements.

[0223] Then, the left weed separating body member 22x of the weed separating body 22A is supported by the left - hand weed separating body support portion 52A, and the right weed separating body member 22y of the weed separating body 22A is supported by the right - hand weed separating body support portion 52B. The left and right weed separating body support portions 52A and 52B support the left and right right weed separating body members 22x and 22y so that their vertical positions can be adjusted, in the same configuration as the weed separating body support portion 52 respectively. The weed separating body 22A is configured to allow relative movement between the left and right right weed separating body members 22x and 22y accompanying the independent lifting and rotation of the left and right support units 201 and 202.

[0224] [Integrated lifting structure of left and right support units] As described above, the left support unit 201 and the right support unit 202 that are floating - supported independently of each other are supported so as to be integrally liftable with respect to the traveling machine body 3. In this embodiment, the left and right support units 201 and 202 are supported so as to be integrally liftable with the work frame 30 by interlocking with the work frame 30 that rotates up and down around the frame rotation axis O2.

[0225] [Regarding auxiliary devices] In the working frame 30, as a configuration for lifting the left and right support units 201 and 202 integrally with the working frame 30, an auxiliary device 410 is provided, which is a support device that supports the left and right support units 201 and 202 from below. The auxiliary device 410 will be described with reference to FIGS. 4, 9, 26 to 29.

[0226] As shown in FIGS. 9 and 26, the auxiliary device 410 is provided on the third horizontal frame portion 217 installed between the front portions of the front inclined portions 213c of the lower frame portion 213 in the working frame 30. The third horizontal frame portion 217 is composed of a pipe-shaped member having a circular cross-sectional shape and extends linearly in the left-right direction. The auxiliary device 410 is provided at four locations at a predetermined interval in the extending direction of the third horizontal frame portion 217. The four auxiliary devices 410 are arranged symmetrically in the left-right direction. Among the four auxiliary devices 410, the two left-side auxiliary devices 410 act on the left support unit 201, and the two right-side auxiliary devices 410 act on the right support unit 202.

[0227] The four auxiliary devices 410 are arranged at positions corresponding to the four gauge wheels 360 with respect to their left-right arrangement on the roller support shaft 417. That is, the auxiliary devices 410 are arranged at positions behind the second, third, fifth, and sixth grass dividing bodies 22 from the left in plan view. Therefore, regarding the left-right arrangement positions of the auxiliary devices 410, the two left-side auxiliary devices 410 are arranged at the boundary position between the first and second drawing and conveying devices 24 from the left and the boundary position between the second and third drawing and conveying devices 24 from the left, and the two right-side auxiliary devices 410 are arranged at the boundary position between the fourth and fifth drawing and conveying devices 24 from the left and the boundary position between the fifth and sixth drawing and conveying devices 24 from the left.

[0228] The auxiliary device 410 is fixedly installed on the third horizontal frame portion 217 and is a part that moves up and down and rotates integrally with the work frame 30. As the work frame 30 moves up and rotates, the auxiliary device 410 pushes up the respective support units 201 and 202 in a state of contacting the portion of the drawing and conveying device 24 from below, thereby integrally moving up and rotating the two support units 201 and 202.

[0229] As shown in FIGS. 27 to 29, the auxiliary device 410 is provided so as to protrude obliquely forward and upward from the third horizontal frame portion 217. The auxiliary device 410 includes a support bracket 411 fixedly installed on the third horizontal frame portion 217, a support rod 412 supported by the support bracket 411, left and right support arms 413 fixedly installed on the support rod 412, and a contact roller 414 supported by the left and right support arms 413. The auxiliary device 410 has a configuration in which the contact roller 414, which is a contact portion with respect to the drawing and conveying device 24 side, is supported by a support portion constituted by the support bracket 411, the support rod 412, and the support arms 413 with respect to the third horizontal frame portion 217.

[0230] The support bracket 411 is a fixing portion with respect to the third horizontal frame portion 217 and forms the base portion of the auxiliary device 410. The support bracket 411 is constituted by a bent plate-shaped member having a substantially inverted U shape in a side view, and has an upper surface portion 411a and front and rear side surface portions 411b as a surface portion having a substantially inverted U shape.

[0231] In a side view, the support bracket 411 has a substantially U-shaped open side facing downward, and is fixed to the outer peripheral surface 217a of the third horizontal frame portion 217 by welding or the like in a manner of sandwiching the third horizontal frame portion 217 between the lower portions of the front and rear side surface portions 411b. The support bracket 411 forms a space portion 419 between the third horizontal frame portion 217 and the upper surface portion 411a, and is provided so as to incline the upper surface portion 411a downward and forward along the inclination of the drawing and conveying device 24 in a side view.

[0232] The support rod 412 is a straight rod-shaped member that penetrates the upper surface portion 411a of the support bracket 411 and extends upward from the upper surface portion 411a in a direction perpendicular to the upper surface portion 411a. At least the intermediate portion in the axial direction of the support rod 412 is a threaded portion with a threaded surface formed on the outer peripheral surface, and it is screwed into a nut portion 415 fixed to the upper side of the upper surface portion 411a of the support bracket 411 by welding or the like.

[0233] The support rod 412 is provided so as to be axially movable with respect to the upper surface portion 411a, and axial position adjustment (height adjustment) with respect to the support bracket 411 is possible by the screw action between the support rod 412 and the nut portion 415. A lock nut 416 is screwed onto the support rod 412 above the nut portion 415.

[0234] The support arm 413 is composed of a plate-shaped member with the left-right direction as the plate thickness direction and the axial direction of the support rod 412 as the longitudinal direction. The left and right support arms 413 have their lower portions positioned on both the left and right sides of the upper end portion of the support rod 412 and are fixed to the support rod 412 by welding or the like, and extend upward along the axial direction of the support rod 412 from the upper end portion of the support rod 412. The left and right support arms 413 support the contact roller 414 by a roller support shaft 417 installed between the upper end portions with the left-right direction as the axial direction.

[0235] The contact roller 414 is a cylindrical or disk-shaped member with the left-right direction as the central axis direction, and has an outer peripheral surface 414a as a contact surface with respect to the pull-out conveying device 24 side. The contact roller 414 has the roller support shaft 417 passing through its central portion.

[0236] The roller support shaft 417 has a disk-shaped flange portion 417a, which is a diameter-expanded portion with respect to the shaft portion, on one end side of the shaft portion penetrating the left and right support arms 413. The flange portion 417a is positioned on the left side of the left support arm 413, and the other end side (right end side) of the shaft portion protrudes from the right support arm 413. A retaining pin 418, such as a snap pin, penetrating the roller support shaft 417 in the radial direction, is engaged with the protruding portion of the roller support shaft 417 from the right support arm 413. Note that the support structure of the roller support shaft 417 with respect to the left and right support arms 413 is not particularly limited.

[0237] As a member constituting the contact roller 414, for example, a rolling bearing such as a ball bearing is used. In this case, the roller support shaft 417 is fixed to the inner ring portion through which the roller support shaft 417 penetrates in the contact roller 414, and the outer ring portion provided via a plurality of rolling elements with respect to the inner ring portion becomes a rotating portion forming the outer peripheral surface 414a. Note that the contact roller 414 and its support structure are not particularly limited. Regarding the contact roller 414, for example, a configuration in which the entire contact roller 414 is rotatably supported with respect to the roller support shaft 417 as an integral rotating body, or a configuration in which the contact roller 414 and the roller support shaft 417 are an integral rotating body and the roller support shaft 417 is rotatably supported with respect to the left and right support arms 413 may be employed.

[0238] On the side of the drawing-out conveyance device 24, a receiving surface portion 420 is provided as a portion for receiving the contact of the contact roller 414 of each auxiliary device 410. The receiving surface portion 420 is a rectangular plate-shaped portion having a longitudinal direction in the front-rear direction in a bottom view, and has a substantially inverted U-shaped cross-sectional shape with the left and right edge portions bent at right angles. The receiving surface portion 420 is fixed to a mounting portion 421 provided below the front-rear intermediate portion of the drawing-out conveyance device 24.

[0239] The attachment part 421 is composed of a bent plate-shaped member having a rectangular shape with the longitudinal direction in the front-rear direction in a bottom view and a substantially inverted hat-shaped cross-sectional shape, and is provided so as to straddle between a pair of chain clamping bodies 60 adjacent to each other in the left-right direction in the drawing. The attachment part 421 is fixedly provided at a plurality of locations by fixing bolts 423 to an attachment plate part 422 such as a chain case part or a frame part constituting each chain clamping body 60 (see FIG. 29). The fixing bolt 423 passes through the left and right fixing plate parts 421b of the attachment part 421 and the attachment plate part 422, and is screwed into a nut part 424 provided above the attachment plate part 422.

[0240] The attachment part 421 has a bottom surface portion formed in the intermediate portion in the left-right direction as an attachment surface portion 421a having substantially the same size as the receiving surface portion 420. The attachment surface portion 421a is an inclined surface portion along the inclination of the drawing-out conveyance device 24 in a side view. The receiving surface portion 420 is fixed to the attachment part 421 by welding or the like in a state where the receiving surface portion 420 overlaps the attachment surface portion 421a from below. The lower plate surface of the receiving surface portion 420 becomes a receiving surface 420a that receives the contact of the outer peripheral surface 414a of the contact roller 414.

[0241] With the above-described configuration, the left support unit 201 and the right support unit 202 are provided so as to rotate upward about the frame rotation axis O2 in conjunction with the upward rotation of the work frame 30 with respect to the traveling body 3 by receiving an action from the auxiliary device 410. The integrated lifting operation of the left and right support units 201 and 202 accompanying the lifting operation of the work frame 30 is performed as follows.

[0242] As shown in FIG. 29, during normal operation by the vegetable harvester 1 or the like, the work frame 30 is in a state where the contact roller 414 of the auxiliary device 410 is separated downward from the drawing-out conveyance device 24. From this state, when the left and right lifting cylinders 250 (see FIG. 12) extend, the work frame 30 rotates so as to raise the front side about the frame rotation axis O2 (see FIG. 29, arrow J1). As the work frame 30 rotates upward, the auxiliary device 410 rises integrally with the work frame 30.

[0243] In the process of the upward rotation of the work frame 30 at a predetermined rotation position, the contact roller 414 of the auxiliary device 410 contacts the receiving surface portion 420 on the side of the drawing and conveying device 24 (see FIG. 29, arrow J2). Here, the outer peripheral surface 414a of the contact roller 414 is used as a contact surface with respect to the receiving surface 420a of the receiving surface portion 420. In FIG. 29, the contact roller 414 in the state of contacting the receiving surface portion 420 is shown by a two-dot chain line.

[0244]

[0243] From the state where the contact roller 414 contacts the receiving surface portion 420, as the work frame 30 further rotates upward, the left and right support units 201 and 202, which are rotatably supported about the lifting rotation axis O1 by the left shaft case support portion 311 and the right shaft case support portion 312 provided at the arrangement site of the first lateral frame portion 215 of the work frame 30 on the rear side, rotate upward integrally with the work frame 30. That is, in the upward rotation of the work frame 30, the four auxiliary devices 410 function as so-called struts with respect to the left and right support units 201 and 202 from the work frame 30, and support the front portions of the respective support units 201 and 202 from below. As the left and right support units 201 and 202 integrated with the work frame 30 rotate upward, the gauge wheels 360 supported on the front sides of the respective support units 201 and 202 rise and float from the ground.

[0245] The left and right support units 201 and 202 are in a state of being independently floatingly supported about the lifting rotation axis O1 by the grounded gauge wheels 360 when not receiving the contact of the contact roller 414 from below. On the other hand, when the left and right support units 201 and 202 receive the support by the auxiliary device 410 due to the upward rotation of the work frame 30, they are supported by the work frame 30 on both the front and rear sides, and will move up and down integrally with the work frame 30 about the frame rotation axis O2.

[0246] When the working frame 30 descends from the state where the left and right support units 201 and 202 are supported by the auxiliary device 410, at a predetermined rotation position during the process of its downward rotation, the gauge wheel 360 contacts the ground, and the contact roller 414 of the auxiliary device 410 separates from the receiving surface portion 420 on the side of the drawing and conveying device 24. As a result, the left and right support units 201 and 202 are each in a state of being floatingly supported. Regarding the interval between the contact roller 414 and the receiving surface portion 420 in the state where the working frame 30 is at the lower end with respect to the lifting and rotation, the size of the interval is ensured so that the lifting and lowering operations due to the floating support of the left and right support units 201 and 202 are not hindered.

[0247] [Scraping-in reel and its support configuration] The configuration of the scraping-in reel 21 and the support configuration of the scraping-in reel 21 will be described with reference to FIGS. 1, 30, and 31. The scraping-in reel 21 is provided in front of the traveling machine body 3 and is an example of a foliage-raising device that raises the foliage portion 2b of the garlic 2.

[0248] As shown in FIGS. 1, 30, and 31, the scraping-in reel 21 includes a reel rotating shaft 54 installed between the tip ends of a pair of left and right reel support arms 51, 51, reel frames 431, 431 connected and fixed to both the left and right sides of the reel rotating shaft 54, a plurality of tine mounting shafts 432 provided on each reel frame 431, a plurality of tines 433 provided on the tine mounting shafts 432, and an auxiliary reel frame 434 arranged adjacent to the right reel frame 431. The reel rotating shaft 54 is rotatably supported by a shaft support portion 430 provided above the tip ends of the left and right reel support arms 51.

[0249] The reel frame 431 includes a disk-shaped base portion 431a provided at its central portion and having a circular shape in side view, a plurality of arm portions 431b radially extending from the base portion 431a, and reinforcing rods 431c installed between adjacent arm portions 431b in the circumferential direction of the base portion 431a. In the present embodiment, five arm portions 431b are provided at equal intervals in the circumferential direction of the base portion 431a, and the reel frame 431 is configured to have a regular pentagonal shape. The left and right reel frames 431 are arranged so as to overlap each other in side view.

[0250] The tine mounting shaft 432 is a linear pipe-shaped shaft portion with the left-right direction as the axial direction, and is rotatably installed between the tip ends of the respective arm portions 431b of the left and right reel frames 431. The raking reel 21 has five tine mounting shafts 432. The tines 433 are provided in parallel at a constant pitch in the axial direction on the tine mounting shafts 432. The tines 433 are arranged at positions corresponding to each row in a configuration for six rows with respect to the left-right position, and six tines 433 are provided on each tine mounting shaft 432.

[0251] The tine 433 is formed by shaping a rod-shaped member such as a spring wire into a predetermined shape, and extends downward from the tine mounting shaft 432. The tine 433 has a main body portion as the extending portion from the tine mounting shaft 432, and has a gentle curved shape with the front side as the convex side in side view with respect to the main body portion. The upper end portion of the tine 433 is used as a mounting portion for the tine mounting shaft 432 side, and the mounting portion is fixed to a tine mounting plate 435 (see FIG. 1) provided along the axial direction on the tine mounting shaft 432 by a fastening tool such as a bolt.

[0252] The auxiliary reel frame 434 is rotatably supported about an eccentric shaft R2 located behind (and slightly above) the rotation center R1 of the left and right reel frames 431. The auxiliary reel frame 434 has the same configuration as the reel frame 431. That is, the auxiliary reel frame 434 includes a disk-shaped base 434a, five arm portions 434b radially extending from the base 434a, and reinforcing rods 434c installed between adjacent arm portions 434b, and is configured to form a regular pentagon shape.

[0253] The auxiliary reel frame 434 is rotatably supported about the eccentric shaft R2 by an auxiliary reel support portion provided on the left and right inner sides (left side) of the reel support arm 51 via a predetermined support member with respect to the shaft support portion 430 of the reel rotation shaft 54 in the right reel support arm 51. The auxiliary reel support portion has a support plate with the left-right direction as the plate thickness direction and three guide rollers arranged on the left and right inner sides (left side) of the support plate. The three guide rollers are cylindrical portions with the left-right direction as the axial direction, and the rotation axes are positioned on a circumference centered on the position of the eccentric shaft R2 in a side view and are arranged at equal intervals in the circumferential direction.

[0254] The auxiliary reel frame 434 has a guide portion on the base 434a that forms a cylindrical inner peripheral surface that circumscribes the three guide rollers of the auxiliary reel support portion. This guide portion is provided as a cylindrical peripheral wall portion along a circumference centered on the eccentric shaft R2 in a side view. The auxiliary reel frame 434 rotates about the eccentric shaft R2 by the guiding action of the three guide rollers with the three guide rollers in contact with the inner peripheral surface of the guide portion.

[0255] An arm-shaped link 436 is provided between the tip of the arm portion 431b of the right reel frame 431 and the tip of the arm portion 434b of the auxiliary reel frame 434. One end side of the link 436 is fixedly connected to the right end of the tine mounting shaft 432 supported by the arm portion 431b. That is, the link 436 rotates integrally with the tine mounting shaft 432 with respect to the arm portion 431b. The other end side of the link 436 is rotatably connected to the tip of the arm portion 434b of the auxiliary reel frame 434.

[0256] According to the above configuration, as the left and right reel frames 431 rotate around the rotation center R1 by the rotation of the reel rotation shaft 54, the auxiliary reel frame 434 connected to the right reel frame 431 via the five links 436 rotates around the eccentric shaft R2 together with the reel frame 431. In the rotation operation of these reel frames, the positional relationship between the connection centers at both ends of each link 436 in side view is the same as the positional relationship between the rotation center R1 and the eccentric shaft R2.

[0257] In side view, the front connection center of the link 436 is the axis of the tine mounting shaft 432, and the rear connection center of the link 436 is the rotation center with respect to the tip of the arm portion 434b of the auxiliary reel frame 434. In the present embodiment, the straight line connecting the front and rear connection centers of the link 436 in side view is a straight line inclined slightly downward. With such a configuration, regardless of the rotation of the reel frame 431 and the auxiliary reel frame 434, the tine mounting shaft 432 appears to be in a stopped state in the axial rotation direction, and the downward extending posture of the tine 433 fixed to the tine mounting shaft 432 is maintained.

[0258] The support structure of the scraping reel 21 will be described. The scraping reel 21 is supported so as to be able to move up and down with respect to the work frame 30. Each of the left and right reel support arms 51 that support the scraping reel 21 is a linear arm portion formed of a square steel pipe member, and the rear end portion is rotatably connected to the left and right vertical side portions 214b of the front frame portion 214 of the work frame 30. The reel support arm 51 has its rear end portion positioned on the left and right outer sides of the vertical side portion 214b, and is rotatably supported about a rotation axis T1 having the left - right direction as the axial direction at a shaft support portion 440 provided at the upper portion of the vertical side portion 214b.

[0259] The left and right reel support arms 51 are connected to each other by a bridging frame 441 installed between them. The bridging frame 441 has a linear horizontal side portion extending in the left - right direction and vertical side portions bent downward from both left and right ends of the horizontal side portion, and is a bent frame portion forming a gate shape in a front view by these portions. The bridging frame 441 connects the lower end portions of the left and right vertical side portions to the reel support arm 51 via support brackets 442 provided on the upper side of the rear portion of the reel support arm 51. With such a configuration, the left and right reel support arms 51 rotate integrally about the rotation axis T1 at the shaft support portion 440 so as to raise and lower the tip side (front end side).

[0260] Between each of the left and right reel support arms 51 and the work frame 30, a cylinder 450 for raising and lowering the scraping reel 21 via the left and right reel support arms 51 is provided. The cylinder 450 for raising and lowering the reel is installed between the vertical side portion 214b of the work frame 30 and the reel support arm 51. The cylinder 450 for raising and lowering the reel is a hydraulic cylinder and has a cylinder tube 451 and a piston rod 452. The cylinder 450 for raising and lowering the reel is provided with the cylinder tube 451 side as the rear side and the piston rod 452 side as the front side, and in a plan view, the expansion - contraction direction is along the front - rear direction, and the longitudinal direction (expansion - contraction direction) is set to be an inclined direction of downward slope to the rear.

[0261] The cylinder 450 for reel lifting and lowering connects the rear end of the cylinder tube 451 to a substantially U-shaped rear bracket 457 provided on the front side of a support protrusion 456 protruding left and right outward from the lower part of the vertical side part 214b so as to be rotatable about the left and right direction as the rotation axis direction. The cylinder 450 for reel lifting and lowering connects the tip of the piston rod 452 to a substantially U-shaped front bracket 458 protruding downward from the lower side of the support bracket 442 in the reel support arm 51 so as to be rotatable about the left and right direction as the rotation axis direction.

[0262] In the configuration as described above, due to the telescopic operation of the left and right cylinders 450 for reel lifting and lowering, the left and right reel support arms 51 and the scraping reel 21 supported therebetween rotate up and down with respect to the work frame 30 integrally about the rotation axis T1 as the rotation axis. Note that the left and right cylinders 450 for reel lifting and lowering operate in a synchronized telescopic manner with each other.

[0263] [Configuration of the digging device] The configuration of the digging device 23 will be described with reference to FIGS. 32 to 35. As shown in FIGS. 32 to 34, the digging device 23 includes an earth-breaking part 500 that breaks the soil near the lower part of the garlic 2 to be pulled out by a plurality of pulling and conveying devices 24, and an earth-breaking support part 501 that supports the earth-breaking part 500 at a position below the plurality of pulling and conveying devices 24. The earth-breaking part 500 has an earth-breaking blade 55 as an earth-breaking member extending in the left-right direction of the machine body. The digging device 23 includes a pair of left and right earth-breaking support parts 501 provided symmetrically in the left-right direction.

[0264] The earth-breaking blade 55 will be described. The earth-breaking blade 55 is a plate-shaped member having left and right sides at both sides in its extending direction as edges. The earth-breaking blade 55 has a substantially constant plate thickness as a whole so as to be substantially linear in a side view of the machine body, and is provided in an inclined state with a forward downward slope. The earth-breaking blade 55 is provided so that the angle formed with respect to the horizontal direction in a side view is, for example, within the range of 20 to 30°.

[0265] The landslide blade 55 has an upper surface 55a which is the upper plate surface, a lower surface 55b which is the lower plate surface, and left and right side end surfaces 55c which form the edge ends on both the left and right sides of the landslide blade 55. The side end surface 55c is a vertical surface along the front-rear direction in plan view. The landslide blade 55 forms a blade portion 55d with a steep front-downward inclination at the front part of the upper surface 55a with respect to the rear part and gradually thins the plate thickness from the rear side to the front side at the front part. The blade portion 55d is formed with a constant width (dimension in the front-rear direction) across the entire left-right direction.

[0266] The landslide blade 55 is supported from the rear side by the left and right landslide support portions 501. The landslide blade 55 has two left and right mountain-shaped portions 55e so as to partially increase the dimension in the front-rear direction of the portion supported by the left and right landslide support portions 501. The mountain-shaped portion 55e is formed such that the rear side is the convex side at the rear side edge portion of the landslide blade 55.

[0267] The landslide blade 55 is provided so as to reciprocate (oscillate) along substantially the same direction as the front-downward inclination direction of the landslide blade 55 in side view by the operation of the landslide support portion 501 while being supported by the left and right landslide support portions 501 (see FIG. 33, arrow S1). In other words, the landslide blade 55 is provided so as to vibrate back and forth along the front-downward inclination of the landslide blade 55 along a substantially straight line direction in side view.

[0268] By the reciprocating movement back and forth of the landslide blade 55, it is inserted into the soil so as to pass under the bottom part of the bulb part 2a of the garlic 2 buried in the ground surface or the ground. By passing the landslide blade 55 through the soil, an action of cutting the root part 2c of the garlic 2 and an action of collapsing the soil (soil mass) around the bulb part 2a are obtained, and the soil can be in a state where it can easily pull up the garlic 2.

[0269] The landslide blade 55 is provided in a range spanning a plurality of extraction and conveyance devices 24 in the left - right direction of the machine body. In the present embodiment, as shown in FIG. 34, in a configuration including six extraction and conveyance devices 24 arranged side - by - side as a six - row configuration, the landslide blade 55 extends in a range U1 from the left - most extraction and conveyance device 24 (24A) to the right - most extraction and conveyance device 24 (24F) in the left - right direction.

[0270] Specifically, as shown in FIG. 34, for the landslide blade 55 in the left - right direction, the left - hand side end face 55c (right - hand side in FIG. 34) is positioned to the left of the conveyance inlet portion 24a of the left - most extraction and conveyance device 24, and the right - hand side end face 55c (left - hand side in FIG. 34) is positioned to the right of the conveyance inlet portion 24a of the right - most extraction and conveyance device 24. Here, the conveyance inlet portion 24a is the portion between the left - and right - hand chain clamping bodies 60 at the front end of the extraction and conveyance device 24.

[0271] Therefore, the landslide blade 55 is extended and arranged such that in the left - right direction, the left - and right - hand side end faces 55c are positioned below or more laterally outside the left - and right - hand outer chain clamping bodies 60 of the left - and right - most extraction and conveyance devices 24. In the present embodiment, the landslide blade 55 is provided such that in the left - right direction, the left - and right - hand side end faces 55c are positioned below the left - and right - hand outer chain clamping bodies 60 of the left - and right - most extraction and conveyance devices 24 (see FIG. 34).

[0272] The landslide support portion 501 will be described. In a configuration including a work frame 30 that supports the left - and right - hand support units 201, 202 including a plurality of extraction and conveyance devices 24 as described above so as to be liftable with respect to the traveling machine body 3 by the auxiliary device 410, the landslide support portion 501 supports the landslide portion 500 including the landslide blade 55 with respect to the work frame 30.

[0273] As shown in FIGS. 32 to 34, the landslide support portion 501 includes a swing mechanism portion 510 forming a four-bar link mechanism, and is configured to reciprocate (swing) the landslide blade 55 by the swing mechanism portion 510. The landslide support portion 501 has a swing mechanism portion 510 that supports the landslide blade 55, and a swing arm 505 that swings the swing mechanism portion 510 in accordance with the rotational drive of the excavation drive shaft 56.

[0274] The excavation drive shaft 56 is installed between the left and right lower frame portions 213 with respect to the work frame 30, and is provided at a position between the second horizontal frame portion 216 and the third horizontal frame portion 217 between the left and right lower frame portions 213. The excavation drive shaft 56 is rotatably supported by a shaft support portion 506 constituted by bearings or the like with respect to each lower frame portion 213.

[0275] Further, the excavation drive shaft 56 has a substantially central portion in the axial direction supported by a central shaft support portion 508 constituted by bearings or the like via a support stay 507 extending forward from the second horizontal frame portion 216. The support stay 507 is constituted by a bent plate-shaped member or the like having a substantially L shape in plan view, and is fixed to a stay attachment portion provided on the second horizontal frame portion 216 by bolts 509 or the like. The excavation drive shaft 56 has a right end protruding rightward from the right lower frame portion 213, and a pulley 279 and a sprocket 133 are fixed to the protruding portion.

[0276] The swing mechanism portion 510 is provided with respect to the third horizontal frame portion 217 constituting the work frame 30, and has a link frame 511, a front link arm 512, a rear link arm 513, and a blade support arm 514. The swing mechanism portion 510 is supported by the third horizontal frame portion 217 in the link frame 511, receives the connection of the swing arm 505 in the rear link arm 513, and supports the landslide blade 55 by the blade support arm 514.

[0277] The link frame 511 is composed of a plate-shaped member having a longitudinal direction substantially in the front-rear direction and a plate thickness direction in the left-right direction, and is fixed to the third transverse frame portion 217 in a state of penetrating the third transverse frame portion 217. The link frame 511 has a substantially flat triangular shape in side view and has a convex mountain shape on the upper side, and penetrates the third transverse frame portion 217 at a substantially central portion in the longitudinal direction and in the vicinity of the top of the mountain shape.

[0278] The front link arm 512 is disposed on the left and right outer sides of the link frame 511 in the left-right direction in front of the third transverse frame portion 217. The front link arm 512 is rotatably supported with respect to the front end portion of the link frame 511 by the front upper shaft support portion 521 about the first rotation axis P1 along the left-right direction (see FIG. 33).

[0279] The front link arm 512 forms a substantially straight arm portion in side view, has an upper end portion supported by the front upper shaft support portion 521, and extends downward from the link frame 511. The front link arm 512 sets the extending direction (longitudinal direction) from the link frame 511 in side view to a direction substantially orthogonal to the downward inclination direction of the landslide blade 55.

[0280] The front link arm 512 has left and right arm plates 512a that face each other in the left-right direction and form the outer shape of the front link arm 512 in side view, and a bridging plate 512b provided between the left and right arm plates 512a. The bridging plate 512b is provided along the front edge portions of the left and right arm plates 512a, and is fixed to each arm plate 512a by welding or the like to constitute the integral front link arm 512 together with the left and right arm plates 512a.

[0281] The front link arms 512 of the left and right swing mechanism parts 510 are rotatably supported with respect to a front link connecting shaft 515 whose axis coincides with the first rotation axis P1. The front link connecting shaft 515 is installed between the front end parts of the left and right link frames 511, extends the left and right end parts outward from the left and right of the link frames 511, and is fixed to the left and right link frames 511 by welding or the like. Each front link arm 512 penetrates through the left and right outward extending parts from each link frame 511 of the front link connecting shaft 515 at the upper end parts of a pair of arm plates 512a, and is pivotally supported so as to integrally rotate around the first rotation axis P1 with respect to the front link connecting shaft 515. A boss part 512c forming a pivot part of the front link arm 512 is provided at the upper end part of the front link arm 512. The boss part 512c is a cylindrical part, is fixed to the left and right arm plates 512a by welding or the like in a state of penetrating through the upper end parts of the left and right arm plates 512a, and penetrates through the front link connecting shaft 515. A bearing member such as a bush penetrating through the front link connecting shaft 515 is interposed between the front link connecting shaft 515 and the boss part 512c.

[0282] The rear link arm 513 is arranged outside the left and right of the link frame 511 in the left and right direction behind the third transverse frame part 217. The rear link arm 513 is rotatably supported with respect to the rear end part of the link frame 511 by a rear upper pivot part 522 around a second rotation axis P2 along the left and right direction (see FIG. 33).

[0283] The rear link arm 513 constitutes a longitudinal substantially triangular arm part with the rear side being the convex side in a side view, has the upper end part supported by the rear upper pivot part 522, and extends downward from the link frame 511. The rear link arm 513 aligns the front side edge part in a side view along a direction substantially parallel to the front link arm 512, makes the upper end part and the lower end part be the top parts in a substantially triangular shape respectively, and positions another top part with a convex shape toward the rear side on the rear side of the upper part.

[0284] The rear link arm 513 has left and right arm plates 513a that face each other in the left-right direction and form the outer shape of the rear link arm 513 in side view, and a bridging plate 513b provided between the left and right arm plates 513a. The bridging plate 513b is provided along the front edge portions of the left and right arm plates 513a and is fixed to each arm plate 513a by welding or the like, thereby constituting an integral rear link arm 513 together with the left and right arm plates 513a.

[0285] The rear link arms 513 of the left and right swing mechanism parts 510 are rotatably supported with respect to a rear link connecting shaft 516 whose axis is aligned with the second rotation axis P2. The rear link connecting shaft 516 is installed between the rear end parts of the left and right link frames 511, and its left and right end parts extend outward in the left and right directions from the link frames 511 and are fixed to the left and right link frames 511 by welding or the like. Each rear link arm 513 penetrates through the left and right outward extending parts of the rear link connecting shaft 516 from the link frames 511 at the upper end parts of the pair of arm plates 513a and is pivotally supported so as to integrally rotate around the second rotation axis P2 with respect to the rear link connecting shaft 516. A boss part 513c forming a pivot support part of the rear link arm 513 is provided at the upper end part of the rear link arm 513. The boss part 513c is a cylindrical part, penetrates through the upper end parts of the left and right arm plates 513a, is fixed to the left and right arm plates 513a by welding or the like, and penetrates through the rear link connecting shaft 516. A bearing member such as a bush that penetrates through the rear link connecting shaft 516 is interposed between the rear link connecting shaft 516 and the boss part 513c.

[0286] The blade support arm 514 constitutes a linear arm part along the front-rear direction in plan view, extends forward from the front link arm 512, and supports the landslide blade 55 at its tip (front end). The blade support arm 514 linearly extends in a forward-downward inclined direction along the inclination of the landslide blade 55 in side view.

[0287] The blade support arm 514 has a rear support arm portion 517 forming its rear part and a front support arm portion 518 forming the front part of the blade support arm 514. The rear support arm portion 517 is configured to be hollow by a rectangular tubular member with openings at both ends. The front support arm portion 518 is formed by a quadrangular prism-shaped member having a quadrangular cross-sectional shape, and is fixed to the rear support arm portion 517 with its rear part inserted into the rear support arm portion 517.

[0288] In the rear support arm portion 517 of the blade support arm 514, the lower end portion of the front link arm 512 is rotatably supported by the front lower shaft support portion 523 about a third rotation axis P3 along the left-right direction (see FIG. 33). Similarly, in the rear support arm portion 517 of the blade support arm 514, the lower end portion of the rear link arm 513 is rotatably supported by a rear lower shaft support portion 524 located behind the front lower shaft support portion 523 about a fourth rotation axis P4 along the left-right direction (see FIG. 33).

[0289] In the front lower shaft support portion 523, the rear support arm portion 517 is located between the lower end portions of the left and right arm plates 512a, and the front link arm 512 is pivotally supported by a straight bar-shaped front support pin 519 with its axis aligned with the third rotation axis P3 so as to be rotatable with respect to the blade support arm 514. The front support pin 519 is locked by a locking pin or the like in a state of passing through the left and right arm plates 512a and the left and right side surfaces 517a of the rear support arm portion 517.

[0290] The front support pin 519 passes through the left and right side surfaces 517a of the rear support arm portion 517, passes through the front support arm portion 518 inserted into the rear support arm portion 517, and locks and fixes the front support arm portion 518 to the rear support arm portion 517. Note that adjustment holes 517c for changing the pivot position of the front link arm 512 in the rear support arm portion 517 are formed as holes for passing the front support pin 519 in the left and right side surfaces 517a of the rear support arm portion 517 (see FIG. 33).

[0291] Further, at a position in front of the front lower shaft support portion 523 in the rear support arm portion 517, a fixing bolt 525 for fixing the front support arm portion 518 to the rear support arm portion 517 is provided. The fixing bolt 525 is screwed into a nut portion 526 fixed by welding or the like above the upper surface portion 517b of the rear support arm portion 517, penetrates the upper surface portion 517b, and abuts against the upper surface 518a of the front support arm portion 518 to exert a pressing action. A lock nut 527 is screwed onto the fixing bolt 525 and is located above the nut portion 526.

[0292] In the rear lower shaft support portion 524, the rear support arm portion 517 is located between the lower end portions of the left and right arm plates 513a, and the rear link arm 513 is pivotally supported by the blade support arm 514 in a rotatable manner by a straight bar-shaped rear support pin 520 whose axis coincides with the fourth rotation axis P4. The rear support pin 520 penetrates the left and right arm plates 513a and the left and right side surface portions 517a of the rear support arm portion 517, and is locked by a locking pin or the like.

[0293] A cylindrical boss portion for penetrating the rear support pin 520 is provided between the left and right side surface portions 517a of the rear support arm portion 517. In addition, at the rear end portion of the rear support arm portion 517, an adjustment boss portion 517d for changing the pivot support position of the rear link arm 513 in the rear support arm portion 517 is provided as a boss portion for forming a hole portion for penetrating the rear support pin 520 (see FIG. 33).

[0294] In the left and right swing mechanism portions 510 having the above-described configuration, the earth collapse blade 55 is supported by the left and right blade support arms 514. The tip end portions of the respective blade support arms 514 are fixed to the earth collapse blade 55 via a mounting plate 528. The mounting plate 528 is a substantially rectangular plate-shaped member having substantially the same plate thickness as the earth collapse blade 55 and having the longitudinal direction in the left-right direction.

[0295] On the upper side of the tip of the front support arm portion 518 which is the tip of the blade support arm 514, there is provided a stepped portion 518b formed so as to form a notch portion substantially L-shaped in side view as a portion for attaching the landslide blade 55 (see Fig. 33). The mounting plate 528 has a recess 528a corresponding to the outer shape in plan view of the tip of the blade support arm 514 at the rear side of the left and right center portions (see Fig. 34), and is fixed to the front support arm portion 518 by welding or the like with the tip of the blade support arm 514 fitted in the recess 528a. The mounting plate 528 is provided so as to project forward and to the left and right sides from the tip of the front support arm portion 518 in a state of being fixed to the front support arm portion 518. The mounting plate 528 forms a flush mounting surface together with the upper surface of the stepped portion 518b of the front support arm portion 518 by its upper surface, on which the lower surface 55b of the landslide blade 55 is joined.

[0296] The landslide blade 55 is fixed to the front support arm portion 518 by a rear fixing bolt 529 in a state where the left and right center portions of each mountain-shaped portion 55e are fitted to the stepped portion 518b of the front support arm portion 518. The rear fixing bolt 529 penetrates through the top of the mountain-shaped portion 55e of the landslide blade 55 and is screwed into a screw hole 518c formed at the tip of the front support arm portion 518. Note that the mounting plate 528 has a shape along the protruding shape of the mountain-shaped portion 55e to the rear at the rear side portion, and the rear end surface is along the rear end surface of the landslide blade 55. Also, the landslide blade 55 is fixed to each mounting plate 528 at two locations on the left and right by a front fixing bolt 530. The front fixing bolt 530 penetrates through the left and right front corner portions of the landslide blade 55 and the mounting plate 528, and is screwed into a nut 531 (see Fig. 33) located below the mounting plate 528.

[0297] As described above, the landslide blade 55 uses the formation sites of the left and right mountain-shaped portions 55e as the fixing portions to the front support arm portion 518 via the mounting plate 528, and is installed between the tips of the left and right blade support arms 514 that extend along the front-rear direction in plan view and obliquely downward and forward in the front lower part of the machine body frame 15, and is supported in a manner of extending from the left and right blade support arms 514 to both the left and right outer sides.

[0298] Thus, the left and right blade support arms 514 that support the earth-breaking blade 55 are configured to be adjustable in length. Specifically, the length of the blade support arm 514 is adjusted by adjusting the length of the insertion portion of the front support arm portion 518 with respect to the rear support arm portion 517.

[0299] In the front support arm portion 518, a hole portion 518d for passing a front support pin 519 that pivotally supports the front link arm 512 on the blade support arm 514 is formed in the rear portion inserted into the rear support arm portion 517 (see FIG. 33). A plurality (five in this embodiment) of hole portions 518d are formed at predetermined intervals in the longitudinal direction of the front support arm portion 518. With such a configuration, by selecting the hole portion 518d used for supporting the front link arm 512, the insertion amount of the front support arm portion 518 with respect to the rear support arm portion 517 changes, and the length of the blade support arm 514 is adjusted. Thereby, the support position of the earth-breaking blade 55 in the front-rear direction by the left and right blade support arms 514 is adjusted.

[0300] The swing arm 505 is installed between the digging drive shaft 56 and the rear link arm 513. The swing arm 505 is pivotally supported in a state of passing through the digging drive shaft 56 and being relatively rotatable with respect to the digging drive shaft 56. The swing arm 505 constitutes a substantially linear arm portion in a side view, pivotally supports one end portion in the longitudinal direction on the digging drive shaft 56, extends forward and downward from the digging drive shaft 56, and pivotally supports the other end portion in the longitudinal direction on the rear link arm 513 so as to be rotatable with the left-right direction as the rotation axis direction.

[0301] The swing arm 505 has left and right arm plates 505a that face each other in the left-right direction and form the outer shape of the swing arm 505 in side view, and a bridging plate 505b provided between the left and right arm plates 505a. Further, as a shaft support member, the swing arm 505 has a cylindrical large-diameter boss portion 505c provided at one end side in the longitudinal direction and penetrating the left and right arm plates 505a, and a cylindrical small-diameter boss portion 505d provided at the other end side in the longitudinal direction and penetrating the left and right arm plates 505a. These boss portions 505c, 505d are fixed to the left and right arm plates 505a by welding or the like. The bridging plate 505b is provided along the front edge portions of the left and right arm plates 505a, and is fixed to each arm plate 505a and the boss portions 505c, 505d on both sides by welding or the like, thereby constituting an integral swing arm 505 together with the left and right arm plates 505a and the boss portions 505c, 505d.

[0302] The swing arm 505 is pivotally supported with respect to the digging drive shaft 56 via an eccentric bearing 540 provided inside the large-diameter boss portion 505c. The eccentric bearing 540 has an eccentric disk 541 fixed to the digging drive shaft 56 and rotating integrally with the digging drive shaft 56 as an inner ring portion that penetrates the digging drive shaft 56.

[0303] The eccentric disk 541 has a cylindrical outer shape, and the central axis of the cylindrical outer shape is eccentric with respect to the axis Q1 of the digging drive shaft 56. That is, the eccentric disk 541 has a hole portion 541a that penetrates the digging drive shaft 56 and an outer peripheral surface 541b that is a cylindrical surface (see FIG. 35), and the central position of the outer peripheral surface 541b is eccentric with respect to the central position of the hole portion 541a that coincides with the axis Q1. In the eccentric bearing 540, an outer ring portion 542 provided via a plurality of rolling elements with respect to the eccentric disk 541 becomes a portion that fits into the inner peripheral side of the large-diameter boss portion 505c.

[0304] The lower end of the swing arm 505 is pivotally supported with respect to the rear link arm 513 by a linear rod-shaped support pin 543 having the left-right direction as the axial direction. The support pin 543 is fixed to the rear link arm 513 side via a fixing plate 545 in a state of passing through the left and right arm plates 513a and the small-diameter boss portion 505d. The fixing plate 545 is fixed to the left and right outer end portions of the support pin 543 by welding or the like and is also fixed to the left and right outer arm plates 513a by bolts 546.

[0305] The support pin 543 passes through the rear top portion in the substantially triangular side view shape of the left and right arm plates 513a. Therefore, in the rear link arm 513, a rear upper pivot portion 522 is located above and in front of the pivot portion of the swing arm 505 by the support pin 543, and a rear lower pivot portion 524 is located below and in front of it.

[0306] In the configuration as described above, the link frame 511, the front link arm 512, the rear link arm 513, and the blade support arm 514 form a four-bar link mechanism (parallel link mechanism) with the axes of the four pivot portions of the front upper pivot portion 521, the rear upper pivot portion 522, the front lower pivot portion 523, and the rear lower pivot portion 524, that is, the first rotation axis P1, the second rotation axis P2, the third rotation axis P3, and the fourth rotation axis P4 as nodes. This four-bar link mechanism connects and supports the blade support arm 514 so as to be movable back and forth by the front link arm 512 and the rear link arm 513 with respect to the link frame 511 fixed to the third transverse frame portion 217. The swing mechanism portion 510 rotates the both link arms 512, 513 with respect to the front upper pivot portion 521 and the rear upper pivot portion 522, the positions of which with respect to the work frame 30 are fixed, among the pivot portions of the front link arm 512 and the rear link arm 513, thereby moving the front lower pivot portion 523 and the rear lower pivot portion 524 provided on the blade support arm 514 side.

[0307] The front link arm 512 and the rear link arm 513 rotate about the front upper shaft support 521 and the rear upper shaft support 522 respectively, thereby reciprocating the blade support arm 514 back and forth (see arrow S1 in Fig. 33). As a result, the landslide blades 55 supported by the left and right blade support arms 514 reciprocate back and forth.

[0308] The operation of such a swing mechanism portion 510 is performed by the reciprocating motion (swing) of the swing arm 505 accompanying the rotational drive of the digging drive shaft 56. The swing arm 505 rotates integrally with the digging drive shaft 56 in a shaft support structure by an eccentric bearing 540. Due to the rotation of the eccentric cam 541, the swing arm 505 operates to reciprocate about the axis Q1 while maintaining a forward-downward inclined posture according to the eccentricity of the eccentric cam 541 with respect to the axis Q1 of the digging drive shaft 56. Due to the operation of such a swing arm 505, the rear link arm 513 reciprocates in small increments about the second rotation axis P2 of the rear upper shaft support 522, accompanied by a substantially vertical swing (see arrow V1 in Fig. 35) of the support portion by the support pin 543 that receives the connection of the lower end portion of the swing arm 505.

[0309] The reciprocating rotation of the rear link arm 513 about the second rotation axis P2 is, as the operation of a four-bar link mechanism, an operation of reciprocating the blade support arm 514 back and forth (see arrow S1 in Fig. 33), accompanied by the reciprocating rotation of the front link arm 512 about the first rotation axis P1 (see arrow V3 in Fig. 35). That is, it is an operation of reciprocating (swinging) the landslide blade 55 back and forth. In Fig. 35, the operation state of the swing arm 505 accompanying the rotation of the digging drive shaft 56 is shown by a two-dot chain line.

[0310] Specific examples of dimensions related to the operation of the swing mechanism unit 510 by the swing arm 505 are as follows. When the eccentricity (dimension) of the eccentric piece 541 with respect to the axis Q1 of the digging drive shaft 56 in the eccentric bearing 540 is 5 mm, the swing arm 505 swings while rotating the eccentric shaft within a range of 10 mm around the axis Q1. Here, the eccentric shaft is the central axis (center line on the outer peripheral surface 541b) of the cylindrical outer shape of the eccentric piece 541 that penetrates the digging drive shaft 56. Due to the rotation of the rear link arm 513 accompanying the swing of such a swing arm 505, the dimensions of the forward and backward movement of the rear lower shaft support portion 524 at the lower end of the rear link arm 513, that is, the stroke of the forward and backward movement of the blade support arm 514, are set to be approximately 30 mm, and the shapes and dimensions of the front link arm 512, the rear link arm 513, etc. are set accordingly.

[0311] In the digging-up device 23 having the above-described configuration, the left and right landslide support portions 501 are provided within the range of the extension of the landslide blade 55 in the left-right direction of the machine body. That is, the landslide support portions 501 are provided inside the range U1 (see FIG. 34) between the left and right side end faces 55c of the landslide blade 55 in the left-right direction.

[0312] The left and right landslide support portions 501 are each configured to extend along the front-rear direction in plan view. The landslide support portion 501 is composed of a link frame 511, a front link arm 512, a rear link arm 513, a blade support arm 514, and a swing arm 505, and these members are arranged and configured to form a straight line along the front-rear direction in plan view (see FIG. 34).

[0313] Specifically, the front link arm 512 and the rear link arm 513 have substantially the same dimensions as each other in the left - right direction and are provided at common positions in the left - right direction. The link frame 511 is composed of a plate - shaped member with the left - right direction as the plate thickness direction and is arranged so as to overlap the left - right inner sides of the front link arm 512 and the rear link arm 513. Further, the blade support arm 514 is provided within the width of the front link arm 512 and the rear link arm 513 in the left - right direction, and the swing arm 505 is provided within the width of the rear link arm 513.

[0314] The left - and - right landslide support portions 501 configured to extend along the front - rear direction in plan view as described above are arranged with respect to the landslide blade 55 such that, for the entire length of the landslide blade 55 in the left - right direction, a substantially 1 / 3 portion of the left - right middle part is positioned between the left - and - right blade support arms 514, a substantially 1 / 3 portion on the left side is positioned more to the left outside than the left - hand blade support arm 514, and a substantially 1 / 3 portion on the right side is positioned more to the right outside than the right - hand blade support arm 514.

[0315] Also, the left - and - right landslide support portions 501 are provided at positions between adjacent extraction and conveyance devices 24 among the plurality of extraction and conveyance devices 24 in the left - right direction. As shown in FIG. 34, in the configuration for six strands in the present embodiment, the left - hand landslide support portion 501 is arranged at a position between the second and third extraction and conveyance devices 24 (24B, 24C) from the left in the left - right direction. Also, the right - hand landslide support portion 501 is arranged at a position between the fourth and fifth extraction and conveyance devices 24 (24D, 24E) from the left in the left - right direction.

[0316] The landslide support portion 501 is arranged symmetrically with respect to adjacent extraction and conveyance devices 24 in the left - right direction. Specifically, the landslide support portion 501 is arranged such that the center position of the blade support arm 514 in the left - right direction coincides with the center position between adjacent extraction and conveyance devices 24 in the left - right direction.

[0317] (Regarding another form of the landslide blade) Another form of the soil crumbling blade 55 will be described with reference to FIG. 36. As shown in FIG. 36, the soil crumbling blade 55 of this form has a zigzag shape formed by a plurality of mountain-shaped portions 550 formed continuously in the left-right direction on the front side. Each mountain-shaped portion 550 is formed such that the apex portion 550b is formed by the left and right linear hypotenuse portions 550a, and has a shape that is symmetric or substantially symmetric in the left-right direction.

[0318] The mountain-shaped portions 550 are formed at six locations corresponding to the configuration for six rows, and each mountain-shaped portion 550 is provided such that the apex portion 550b is positioned at a position corresponding to the conveyance inlet portion 24a of the drawing conveyance device 24 in the left-right direction. That is, the soil crumbling blade 55 of this form has a configuration in which mountain-shaped portions 550 that position the apex portion 550b at positions corresponding to each row of the garlic 2 planted in rows are formed at six locations according to the six-row drawing conveyance device 24.

[0319] The soil crumbling blade 55 of this form has a straight rear edge portion 550c along the left-right direction at the rear side, and has rear bevel portions 550d that extend from the left inner side to the left outer side from the rear side to the front side in a plan view on both the left and right sides of the rear edge portion 550c. A front bevel portion 550e is formed on the front side of the rear bevel portion 550d. The front bevel portion 550e forms an obtuse-angled corner together with the rear bevel portion 550d in a plan view, and forms a right-angled or acute-angled corner together with the left and right outer hypotenuse portions 550a of the mountain-shaped portion 550 located on the left and right outer sides, and an apex portion 550f is formed at such a corner. The apex portion 550f becomes the left and right ends of the soil crumbling blade 55 in this form, and the range U1 between the left and right apex portions 550f is the extension range of the soil crumbling blade 55 in the left-right direction.

[0320] The landslide blade 55 of this embodiment has a front edge as a blade portion 550g along a zigzag formed by a plurality of mountain-shaped portions 550. Similar to the blade portion 55d in the landslide blade 55 shown in FIG. 32 and the like, the blade portion 550g is formed as a portion whose plate thickness gradually decreases from the rear side to the front side. The blade portion 550g is formed with a constant width (dimension in the front-rear direction) along the zigzag shape over the entire left-right direction of the landslide blade 55. The blade portion 550g forms a ridge line portion along the front-rear direction in a plan view at a position corresponding to the apex portion 550b in each mountain-shaped portion 550, and forms a valley line portion along the front-rear direction in a plan view between adjacent mountain-shaped portions 550.

[0321] [Arrangement Structure of Drive Mechanism in Vegetable Harvester] The arrangement structure of the drive mechanism in the vegetable harvester 1 will be described. In the vegetable harvester 1, drive mechanisms for transmitting the power of the engine 10, which is a drive source for driving the traveling body 3, are arranged on both sides in the left-right direction of the machine body with respect to the work frame 30.

[0322] The vegetable harvester 1 includes, as the above drive mechanisms, a first drive mechanism 600 arranged on the left side, which is one side in the left-right direction of the machine body, with respect to the work frame 30, and a second drive mechanism 700 arranged on the right side, which is the other side in the left-right direction of the machine body, with respect to the work frame 30 (see FIG. 5).

[0323] The first drive mechanism 600 is a drive mechanism for transmitting power of synchronous rotation synchronized with the vehicle speed of the traveling body 3, and the second drive mechanism 700 is a drive mechanism for transmitting power of non-synchronous rotation not synchronized with the vehicle speed of the traveling body 3. That is, the first drive mechanism 600 is a drive mechanism included in the vehicle speed synchronization work drive system described above, and the second drive mechanism 700 is a drive mechanism included in the vehicle speed non-synchronization work drive system described above.

[0324] The first drive mechanism 600 includes a fourth belt transmission mechanism 113, a fifth belt transmission mechanism 117, and a second chain transmission mechanism 119 (see FIG. 5). As described above, these transmission mechanisms are arranged on the left side of the work frame 30 in the left - right direction of the machine body. The input pulley 263 of the fourth belt transmission mechanism 113, the pulley 116 of the fifth belt transmission mechanism 117, and the sprocket 118 of the second chain transmission mechanism 119 are pivotally supported on the left - side work - part input shaft 115 at the frame support portion 230 on the left side of the work frame 30.

[0325] The axes of these transmission mechanisms arranged on the left side of the work frame 30 are all in the clockwise direction (right - hand rotation direction) when viewed from the left side of the machine body, which is the rotation direction during the harvesting operation by the vegetable harvester 1. Specifically, the second intermediate shaft 110, the left - side work - part input shaft 115, the conveyor input shaft 45, and the pre - treatment input shaft 120 have a basic rotation direction during operation that is clockwise when viewed from the left side.

[0326] The second drive mechanism 700 includes a sixth belt transmission mechanism 128, a seventh belt transmission mechanism 131, and a third chain transmission mechanism 135 (see FIG. 5). These transmission mechanisms are arranged on the right side of the work frame 30 in the left - right direction of the machine body. The input pulley 273 of the sixth belt transmission mechanism 128 and the pulley 132 of the seventh belt transmission mechanism 131 are pivotally supported on the rotation - support frame portion 211 as a double - pulley 275 at the frame support portion 230 on the right side of the work frame 30.

[0327] The third chain transmission mechanism 135 is composed of a rear - part chain transmission mechanism 135a including a sprocket 133 and a front - part chain transmission mechanism 135b that is driven by receiving power transmission from the rear - part chain transmission mechanism 135a (see FIG. 5). The rear - part chain transmission mechanism 135a has a sprocket 133, a sprocket 701 arranged in front of the sprocket 133, and a chain 702 wound around these sprockets.

[0328] The sprocket 701 is fixedly installed on an intermediate shaft 703 with the left - right direction as the axial direction. The intermediate shaft 703 is rotatably supported by a shaft support portion 710 (see FIGS. 3 and 9) provided on the work frame 30. The shaft support portion 710 is composed of a cylindrical member and is provided so as to protrude rightward from the upper part of the right vertical side portion 214b of the front frame portion 214 constituting the work frame 30. The intermediate shaft 703 is rotatably supported with respect to the shaft support portion 710 via a bearing or the like.

[0329] The front chain transmission mechanism 135b has a sprocket 704 fixedly installed at a position to the right of the sprocket 701 on the intermediate shaft 703, a sprocket 705 fixedly installed at the right end portion of the reel rotation shaft 54, and a chain 706 wound around these sprockets. The front chain transmission mechanism 135b is provided in a chain case 720 disposed on the right side of the scraping reel 21. The chain case 720 is provided in a range extending from the front portion of the machine body frame 15 to the front portion of the scraping reel 21 in the front - rear direction and is disposed on the right side of the work frame 30 in the left - right direction. The chain case 720 is configured as a flat box - shaped thick - plate having a substantially front - rear direction, which is the extending direction of the front chain transmission mechanism 135b, as the longitudinal direction and the left - right direction as the thickness direction.

[0330] The shafts forming these transmission mechanisms and the double pulley 275 disposed on the right side of the work frame 30 all have a counter - clockwise direction (left - hand rotation direction when viewed from the left side of the machine body) as the rotation direction during the harvesting operation by the vegetable harvester 1. Specifically, the first countershaft 102, the double pulley 275, the digging drive shaft 56, the intermediate shaft 703, and the reel rotation shaft 54 have a basic rotation direction during operation as the counter - clockwise direction when viewed from the left side.

[0331] Each of the first drive mechanism 600 and the second drive mechanism 700 has a frame shaft support drive member that is coaxially arranged with the frame rotation axis O2 and receives the power transmission of the engine 10 to perform rotational driving. In the present embodiment, the first drive mechanism 600 has a left work unit input shaft 115 as an example of the frame shaft support drive member, and the second drive mechanism 700 has a double pulley 275 as an example of the frame shaft support drive member.

[0332] The work frame 30 has a rotation support frame portion 211 that constitutes a shaft support of the work frame 30 by the frame rotation axis O2. The work frame 30 is supported around the frame rotation axis O2 by frame support portions 230 provided on both the left and right sides of the rotation support frame portion 211.

[0333] In such a configuration, the left work unit input shaft 115 of the first drive mechanism 600 is provided on the left side, which is one side in the axial direction of the rotation support frame portion 211, and receives the input of the power of the synchronized rotation synchronized with the vehicle speed by the vehicle speed synchronized work drive system described above. Further, the double pulley 275 of the second drive mechanism 700 is provided on the right side, which is the other side in the axial direction of the rotation support frame portion 211, and receives the input of the power of the non-synchronized rotation, which is a rotation at a constant speed not synchronized with the vehicle speed, by the vehicle speed non-synchronized work drive system described above.

[0334] Summarizing the power transmission paths of the traveling drive system and the vehicle speed synchronized work drive system, it becomes: engine 10 → HST 140 → transmission 11 and feed input → left work unit input shaft 115 (rotation fulcrum of work frame 30) → each device of the conveying cutting unit 40 and conveyor drive. Also, summarizing the power transmission path of the vehicle speed non-synchronized work drive system, it becomes: engine 10 → double pulley 275 (rotation fulcrum of work frame 30) → digging device 23 → scraping reel 21.

[0335] In this embodiment, on the right side of the rotation support frame portion 211, a double pulley 275 supported by the rotation support frame portion 211 is provided as a frame shaft support drive member. However, a configuration in which a shaft member is provided as a frame shaft support drive member may be employed on the left side of the rotation support frame portion 211 as well. That is, a configuration may be adopted in which a shaft member is provided for the rotation support frame portion 211 via a bearing or the like, and a pulley 132 and an input pulley 273 are provided on the shaft member. Further, on the left side of the rotation support frame portion 211, similar to the right side of the rotation support frame portion 211, a configuration may be adopted in which a rotating body such as a pulley or a sprocket that is supported via a bearing or the like with the rotation support frame portion 211 itself as a shaft portion and that receives winding of a belt or a chain is provided as a frame shaft support drive member.

[0336] According to the vegetable harvester 1 according to this embodiment having the above-described configuration, the following operational effects can be obtained.

[0337] According to the vegetable harvester 1 according to this embodiment, in a configuration in which a plurality of conveying and cutting units 40 for nipping and pulling out and conveying the foliage portion 2b of the garlic 2 are provided corresponding to each row, even when there is a height difference in the field surface on both the left and right sides of the machine body, the height of the conveyance inlet of the conveying and cutting unit 40 can be set to an appropriate height.

[0338] In the vegetable harvester 1, the six conveying and cutting units 40 are divided into two units, a left support unit 201 and a right support unit 202, and each of the support units 201, 202 is supported so as to be rotatable about a lifting rotation axis O1 with respect to the traveling machine body 3. According to such a configuration, since the ground height can be adjusted for each of the support units 201, 202, even when the height of the field surface is non-uniform within the harvesting width by the vegetable harvester 1, an optimal conveyance inlet height can be set for each of the support units 201, 202, and the pulled-out garlic 2 can be set in an optimal conveyance posture. Thereby, it is possible to suppress harvesting losses such as leaving the garlic 2 unharvested or dropping during conveyance, and defects such as poor cut lengths of the foliage portion 2b by the foliage cutting device 26.

[0339] In this embodiment, in the configuration for six rows, it is divided into two support units 201 and 202, three rows on each side, but the mode of division is not particularly limited. Examples of the mode of division include, for example, in the configuration for six rows, a configuration divided into three support units with two rows each, a configuration divided by each row, a configuration divided into two parts with two rows on one side and four rows on the other side, and a configuration divided into three parts with one row at each of the left and right ends and four rows in the middle. However, from the perspective of avoiding the complication of the structure and ensuring the strength of the support unit, a unit configuration divided equally into two parts on the left and right as in this embodiment is preferable. According to the configuration in which the six-row structure is divided into three rows each and supported in a floating manner, the deviation in the height of the loading entrance can be reduced to less than half compared to the configuration in which the six rows are integrally supported.

[0340] Further, in the vegetable harvester 1, the left and right support units 201 and 202 are supported so as to be integrally liftable with respect to the traveling body 3. According to such a configuration, the six conveying and cutting units 40 supported by being divided into three rows each can be lifted and lowered simultaneously. Thereby, for example, when turning the direction of the machine body at the edge of the field, when entering or leaving the field with the machine body, or when loading and unloading the machine body onto a truck or the like, when raising the front side of the six conveying and cutting units 40 with respect to the traveling body 3, the operation of raising all the conveying and cutting units 40 can be facilitated.

[0341] Moreover, according to the integral lifting structure of the left and right support units 201 and 202, for example, in a configuration in which the conveying and cutting unit 40 is lifted and lowered by the power of an actuator such as a hydraulic cylinder, it is not necessary to provide an actuator for each support unit, and a common actuator can be used for the left and right support units 201 and 202. Thereby, the configuration for lifting and lowering the plurality of support units 201 and 202 can be made simple and inexpensive.

[0342] Further, the conveying and cutting unit 40 includes a pulling and conveying device 24 that pulls out the garlic 2 from the soil, clamps it, and conveys it. According to such a configuration, when there is a height difference in the field within the harvesting width by the vegetable harvester 1, for each of the left and right support units 201 and 202, it is possible to adjust and set the pulling start position (height) of the garlic 2 by the pulling and conveying device 24 according to the height of the field. Thereby, harvesting losses such as leaving garlic 2 unharvested and dropping during conveyance can be reduced.

[0343] Also, in the vegetable harvester 1, the plurality of conveying and cutting units 40 are supported so as to be swingable (rotatable so as to raise and lower the front side) about a lifting rotation axis O1 provided at the rear of the plurality of conveying and cutting units 40 with respect to the work frame 30. According to such a configuration, in the shaft support portion 20 having a rotation structure around the lifting rotation axis O1 of the plurality of conveying and cutting units 40, by using a configuration in which power for driving each conveying and cutting unit 40 is input and the input power is distributed and transmitted to each conveying and cutting unit 40, simplification of the transmission mechanism for the plurality of conveying and cutting units 40 can be achieved.

[0344] In the present embodiment, as shown in FIG. 5, rotational power is input to a preprocessing input shaft 120 provided in the shaft support portion 20 by a second chain transmission mechanism 119. The rotational power of the preprocessing input shaft 120 is transmitted to the left and right conveying input shafts 65 of each conveying and cutting unit 40 via an input side bevel gear 122 and an output side bevel gear 123. According to such a configuration, simplification of the power transmission configuration for the plurality of conveying and cutting units 40 can be achieved.

[0345] Further, the vegetable harvester 1 includes gauge wheels 360 and weed separating body support portions 52 provided for each of the support units 201 and 202 as a ground height adjustment mechanism for adjusting the ground height of the plurality of conveying and cutting units 40.

[0346] According to such a configuration, the left and right support units 201 and 202 can be floatingly supported independently of the field by the gauge wheels 360 that are grounded on the field surface, and the ground height can be adjusted for each of the support units 201 and 202. Thereby, even when the height of the field surface is uneven within the harvesting width by the vegetable harvester 1, for each of the support units 201 and 202, the height of the loading entrance and the conveying posture of the garlic 2 can be made optimal.

[0347] Further, due to the floating support structure for each of the support units 201 and 202, the gauge wheels 360 provided for each of the support units 201 and 202 follow the unevenness of the field surface such as the upper surface of the ridge, so that an automatic lifting and lowering action following the unevenness of the field surface can be obtained for each of the support units 201 and 202. Thereby, even when the height of the field surface is uneven in the left-right direction, it is possible to always keep the optimal height of the loading entrance corresponding to the height of the field surface constant for each of the support units 201 and 202.

[0348] Further, the gauge wheel 360 is provided inside the weeding body 22 configured to form the space portion 361. According to such a configuration, since the gauge wheel 360 can be covered by the weeding body 22, it is possible to suppress the winding or catching of the foliage portion 2b on the gauge wheel 360 as the machine body moves forward, and a good floating support state can be maintained for the left and right support units 201 and 202.

[0349] Further, in a configuration in which the six conveying and cutting units 40 are supported by the working frame 30 so as to be rotatable about the lifting rotation axis O1, the working frame 30 is supported by the traveling machine body 3 so as to be rotatable about the frame rotation axis O2. According to such a configuration, since the six conveying and cutting units 40 and the working frame 30 can be rotated about the common frame rotation axis O2, the configuration of the transmission mechanism from the engine 10 to each device can be made into a simple structure.

[0350] In this embodiment, on both the left and right sides of the rotation support frame portion 211 that constitutes the pivot support portion by the frame rotation axis O2, a left working portion input shaft 115 and a double pulley 275 as a frame shaft support portion drive member that is coaxially arranged with the frame rotation axis O2 and receives the transmission of power from the engine 10 to perform rotational drive are provided. With such a configuration, the configuration of the transmission mechanism from the engine 10 to each device can be made into a simple structure.

[0351] Further, the work frame 30 is provided with an auxiliary device 410 that pushes up the left and right support units 201 and 202 so that they rotate upward as the work frame 30 rotates upward. According to such a configuration, the left and right support units 201 and 202 can be rotated upward in conjunction with the upward rotation of the work frame 30 with respect to the traveling body 3. Thereby, for example, when turning the direction of the body at the edge of the field, etc., the operation of raising the left and right support units 201 and 202 with respect to the traveling body 3 can be facilitated.

[0352] Further, according to the configuration that enables the integrated lifting of the work frame 30 and the left and right support units 201 and 202, for example, in a configuration where the conveying and cutting unit 40 is lifted by the power of an actuator such as a hydraulic cylinder, the actuator for lifting and rotating the work frame 30 can be shared. Thereby, it is not necessary to provide a dedicated actuator for lifting the left and right support units 201 and 202, and the configuration for lifting the left and right support units 201 and 202 can be made into a simple and inexpensive configuration. In this embodiment, the left and right lifting cylinders 250 can rotate the left and right support units 201 and 202 upward together with the work frame 30.

[0353] In addition, the auxiliary device 410 has a contact roller 414 as a contact portion with respect to the support units 201 and 202. According to such a configuration, at the contact portion of the auxiliary device 410 with respect to the support units 201 and 202, the shaking, vibration, etc. of the support units 201 and 202 accompanying the vibration of the aircraft body or the like can be absorbed by the rotation of the contact roller 414. As a result, a good contact action of the auxiliary device 410 with respect to the support units 201 and 202 can be obtained, and the integrated lifting and lowering operation of the work frame 30 and the support units 201 and 202 can be performed smoothly.

[0354] In addition, in the auxiliary device 410, the support rod 412 that supports the contact roller 414 is provided so that its height can be adjusted. According to such a configuration, by adjusting the height position of the contact roller 414, it is possible to restrict the range of rotation of the left and right support units 201 and 202 toward the lower side by grounding the gauge wheel 360.

[0355] The vegetable harvester 1 is provided with a raking reel 21 having a configuration in which a plurality of tines 433 are attached to each of a plurality of tine mounting shafts 432 extending in the left-right direction of the machine body as a foliage lifting device provided in front of the traveling machine body 3. According to such a configuration, good lifting performance can be obtained for the foliage part 2b lying on the field surface.

[0356] Regarding the configuration for lifting the foliage part 2b, for example, in the case of a configuration in which a belt with protrusions is provided parallel to the rows in the field (along the traveling direction) and is fixed in front of the pulling and conveying device and arranged between the rows, since the foliage lying parallel to the rows is not easily caught by the protrusions, the lifting action may be insufficient. Further, according to the same configuration, since the device provided with the belt with protrusions is fixed in front of the pulling and conveying device, the device may collide with convex portions such as small ridges and protrusions on the field surface during the harvesting operation. In such a case, it is necessary to stop the machine each time to avoid it.

[0357] Therefore, according to the configuration including the raking reel 21 that rotates a plurality of tine bars, the plurality of tines 433 arranged in the left-right direction can also obtain a lifting effect on the foliage part 2b that has fallen parallel to the row, so that good liftability can be obtained. Further, in the rotationally driven raking reel 21, the tine mounting shaft 432 can assist in lifting the foliage part 2b by the plurality of tines 433.

[0358] Further, the raking reel 21 is configured to maintain the downward extending posture of the tines 433 during its rotational operation. According to such a configuration, for example, compared with a configuration in which an elongated rubber plate is attached along the radial direction in a side view with respect to the reel rotation shaft 54, it is possible to suppress the increase in the peripheral speed of the tip of the tine 433 accompanying the rotation of the raking reel 21. Also, the angle of the tines 433 can be kept constant. From these, it is possible to reliably pick up the foliage part 2b while suppressing the shredding of the foliage of the garlic 2. Further, the action of lifting the foliage part 2b by the plurality of tines 433 and the separating action of the foliage by the weed separating body 22 provided between the rows cooperate to reliably feed the foliage part 2b into the pulling and conveying device 24, so that the remaining garlic 2 can be reduced.

[0359] Further, the raking reel 21 is provided in a state of being supported by the work frame 30. According to such a configuration, for example, when turning the machine body at the edge of the field, the raking reel 21 can be lifted together with the work frame 30 and the left and right support units 201, 202 with respect to the traveling machine body 3, so that the operation of lifting the harvesting unit 6 with respect to the traveling machine body 3 can be facilitated. Also, the left and right lifting cylinders 250 for lifting and rotating the work frame 30 can be shared as an actuator for lifting the raking reel 21.

[0360] In this embodiment, the raking reel 21 is supported by left and right reel lifting cylinders 450 so as to be able to move up and down with respect to the work frame 30. According to such a configuration, since the height of the raking reel 21 can be adjusted independently, even when there are convex portions such as small ridges in the field surface during the harvesting operation, the convex portions can be avoided by raising the raking reel 21, and collisions with the field surface can be avoided. As a result, continuous work can be performed without stopping the machine.

[0361] According to the vegetable harvester 1 according to this embodiment, when pulling out the garlic 2 from the soil, the garlic 2 is not damaged or dragged by the configuration for collapsing the soil, so that the efficiency of continuous harvesting work can be increased and the harvesting loss can be reduced.

[0362] The vegetable harvester 1 includes a soil collapsing portion 500 having a soil collapsing blade 55 extending in the left-right direction of the machine body, and left and right soil collapsing support portions 501 that support the soil collapsing portion 500 at positions below a plurality of extraction and conveyance devices 24. The left and right soil collapsing support portions 501 are provided within the range of extension of the soil collapsing blade 55 in the left-right direction of the machine body.

[0363] According to such a configuration, since the soil collapsing support portion 501 that supports the soil collapsing blade 55 is located within the left-right width of the soil collapsing blade 55, in the harvesting operation of the garlic 2 planted in rows, even when there are variations between rows due to bending of the rows or misalignment of the machine body during traveling, the soil collapsing blade 55 and the soil collapsing support portion 501 do not contact the garlic 2, and it is possible to suppress damage to the garlic 2 by the soil collapsing blade 55 and the soil collapsing support portion 501.

[0364] Even when variations between rows or misalignment of the machine occur during the harvesting operation, the soil collapsing blade 55 and the left and right soil collapsing support parts 501 do not pass over the next harvesting crop, which is an unharvested crop. Therefore, it is possible to suppress the occurrence of pulling off the foliage part 2b of the next harvesting crop or lifting and dragging the bulb part 2a. As a result, it is possible to suppress the interruption of continuous harvesting operations and reduce the harvesting loss.

[0365] Here, the next harvesting crop is a crop before harvesting that exists on one side (left or right) of the machine with respect to the six rows of crops being harvested during the harvesting operation of the row-planted crops. In the present embodiment, as shown in FIG. 8, the garlic 2(2X) in the row located next to the left side (right side in FIG. 8), which is the side opposite to the operation part 5 side of the machine, with respect to the six rows of crops being harvested, becomes the next harvesting crop. The row of unharvested garlic 2(2X) shown in FIG. 8 is included in the row to be harvested by the machine or the like that has turned back in the field after the harvesting of the six rows of garlic 2 on its right side (left side in FIG. 8).

[0366] Further, the soil collapsing support part 501 is configured to extend along the front-rear direction in plan view, and is provided at a position between the adjacent pulling and conveying devices 24 in the left-right direction, that is, at a position corresponding to the center between the rows of the row-planted crops.

[0367] According to such a configuration, since the arrangement area of the soil collapsing support part 501 can be removed from the conveying path of the garlic 2, for example, even when the garlic 2 has an unexpected length or the hanging length of the garlic 2 from the pulling and conveying device 24 becomes relatively long due to a delay in pulling out the garlic 2, it is possible to suppress the contact of the soil collapsing support part 501 with the garlic 2 being conveyed. Further, it is possible to suppress the contact of the soil collapsing support part 501 with the garlic 2 remaining in the field due to a failure in pulling out. From these, it is possible to suppress the interruption of continuous harvesting operations due to the foliage part 2b being caught on the soil collapsing support part 501 or the like, suppress damage to the bulb part 2a, and reduce the harvesting loss.

[0368] Regarding the configuration of the soil cutting blade, conventionally, for example, there is a soil cutting blade that has a horizontal blade portion extending over the entire range of six conveying and cutting units 40 in the left - right direction, and vertical blade portions rising from both ends of the horizontal blade portion, and these portions form a substantially "U" - shaped soil cutting blade when viewed from the front. In a configuration equipped with such a soil cutting blade, in the harvesting operation, when there are variations in the row spacing or misalignment of the machine body, or when the foliage 2b of the next - harvest crop falls into the harvesting range, the foliage 2b of the next - harvest crop may get caught on the vertical blade portion on the side of the next - harvest crop among the left - and - right vertical blade portions, resulting in problems such as tearing the foliage 2b, lifting and dragging the bulb portion 2a, or clogging of the foliage 2b.

[0369] Therefore, in the vegetable harvester 1, the soil cutting blade 55 is a plate - shaped member with the left and right sides as edges. That is, the soil cutting blade 55 is composed of a flat - plate - shaped member having a substantially constant thickness as a whole, and on both the left and right sides, it has side end faces 55c whose side - view shape matches the outer shape of the soil cutting blade 55 in side view. According to such a configuration, since space can be secured on both sides of the soil cutting blade 55, even when there are variations in the row spacing or misalignment of the machine body in the harvesting operation, or when the foliage 2b of the next - harvest crop falls into the harvesting range, the next - harvest crop can pass through the space on the side of the soil cutting blade 55. Thereby, it is possible to suppress problems such as tearing the foliage 2b of the next - harvest crop or dragging the bulb portion 2a, so that it is possible to suppress the interruption of continuous harvesting operations and reduce the harvesting loss.

[0370] In a configuration including a work frame 30 that supports a plurality of extraction and conveyance devices 24 so as to be movable up and down with respect to the traveling machine body 3, the landslide support portion 501 is configured to support the landslide portion 500 with respect to the work frame 30. According to such a configuration, for example, when turning the direction of the machine body at the edge of the field, by raising the work frame 30 with respect to the traveling machine body 3, the landslide portion 500 and the landslide support portion 501 can be raised together with the left and right support units 201 and 202. Thereby, the landslide portion 500 and the landslide support portion 501 can be raised with respect to the traveling machine body 3 with a simple configuration without separately providing a dedicated device or the like. Further, since the positional relationship between the work frame 30 and the landslide portion 500 is maintained, when the once-raised work frame 30 is lowered after turning the direction of the machine body and the harvesting operation is resumed, the height of the landslide portion 500 before the work frame 30 is raised can be reproduced as it is, so that good workability can be obtained.

[0371] Further, the landslide blade 55 is provided over the entire width of the six extraction and conveyance devices 24 in the left-right direction of the machine body. According to such a configuration, the action of landsliding for six rows of crops can be obtained by a single landslide blade 55, so that the support structure and the drive structure of the landslide blade 55 can be made simple.

[0372] Further, since the landslide blade 55 is a single member, the number of support portions for supporting the landslide blade 55 on the traveling machine body 3 side can be reduced. In the present embodiment, the landslide blade 55 is supported at two locations on the left and right by a pair of left and right landslide support portions 501. Thereby, it is possible to suppress the catching or contact of the foliage portion 2b of the garlic 2 or the like with the configuration for supporting the landslide blade 55.

[0373] In addition, the landslide support portion 501 is configured to reciprocate the landslide blade 55 by a swing mechanism portion 510 forming a four-bar link mechanism. According to such a configuration, since the landslide blade 55 can be linearly reciprocated along a front-downward inclination in a side view, for example, compared with a configuration in which the landslide blade reciprocates along an arc in a side view, the action of lifting the soil upward can be reduced, and the swelling of the soil (soil clods) in the field due to the action of the landslide blade 55 can be suppressed.

[0374] As a result, the height of the conveyance inlet portion 24a of the pulling conveyance device 24 can be set to a low position (a position close to the field surface). As a result, the clamping position of the foliage portion 2b by the pulling conveyance device 24 can be lowered, so that the pulling accuracy by the pulling conveyance device 24 and the cutting accuracy of the foliage portion 2b and the root portion 2c can be improved, and the dropping of the garlic 2 during conveyance by the pulling conveyance device 24 can be reduced, and the harvesting loss can be reduced.

[0375] In addition, the landslide support portion 501 is configured to convert the rotational motion of the digging drive shaft 56 into the reciprocating motion of the swing arm 505 by the eccentric cam 541 fixed to the digging drive shaft 56, and to convert the reciprocating motion of the swing arm 505 into the substantially linear motion of the landslide blade 55 by the swing mechanism portion 510. According to such a configuration, it is possible to reciprocate the landslide blade 55 along a substantially straight line using the rotational power of the digging drive shaft 56 with a simple configuration.

[0376] In addition, the left and right blade support arms 514 that support the landslide blade 55 are configured to be adjustable in length. According to such a configuration, since the front-rear position of the landslide blade 55 can be adjusted, for example, it is possible to adjust the action depth and the front-rear position of the landslide blade 55 with respect to the soil according to the soil quality of the soil and the growth status of the garlic 2.

[0377] Further, according to another form of the landslide blade 55 as shown in FIG. 36, since the mountain-shaped portion 550 having the vertex portion 550b is positioned at a position corresponding to the center of each strip in the left-right direction, the action of cutting the root portion 2c of the garlic 2 by the landslide blade 55 and the action of collapsing the soil around the bulb portion 2a can be improved. Thereby, it is possible to easily pull out the garlic 2 from the soil.

[0378] According to the vegetable harvester 1 according to the present embodiment, the power of the engine 10 for driving the traveling body 3 can be efficiently input to each device according to the arrangement of each device for harvesting the garlic 2, and a simple power transmission configuration can be realized.

[0379] The vegetable harvester 1 includes a configuration in which a first drive mechanism 600 and a second drive mechanism 700 are arranged on both the left and right sides of the work frame 30 as drive mechanisms for transmitting the power of the engine 10. According to such a configuration, as a drive mechanism for transmitting power to each device, it is possible to use either the left or right drive mechanism that is more convenient according to the arrangement position of each device, the operation mode of the drive unit, etc. Thereby, an efficient power transmission configuration can be realized for the entire vegetable harvester 1.

[0380] Further, the first drive mechanism 600 arranged on the left side of the work frame 30 is a drive mechanism of the vehicle speed synchronized work drive system, and the second drive mechanism 700 arranged on the right side of the work frame 30 is a drive mechanism of the vehicle speed non-synchronized work drive system. According to such a configuration, for example, the first drive mechanism 600 is used as a drive mechanism for transmitting power to each device constituting the conveyance cutting unit 40, and the second drive mechanism 700 is used as a drive mechanism for transmitting power to the scraping reel 21 and the digging device 23. It is possible to select either one of the drive mechanisms arranged separately on the left and right according to the functions of each device provided in the vegetable harvester 1.

[0381] Further, the work frame 30 with drive mechanisms arranged on both the left and right sides is supported so as to be vertically rotatable about the frame rotation axis O2. According to such a configuration, the work frame 30 can support the conveyance cutting unit 40 so as to be movable up and down, and drive mechanisms can be provided on both the left and right sides of the work frame 30.

[0382] Further, the first drive mechanism 600 has a left work unit input shaft 115 as a frame shaft support drive member arranged coaxially with the frame rotation axis O2, and the second drive mechanism 700 has a double pulley 275 as a frame shaft support drive member.

[0383] According to such a configuration, each of the left and right drive mechanisms 600, 700 transmits power to each device via frame shaft support drive members pivotally supported on both the left and right sides of the shaft support of the work frame 30 around the frame rotation axis O2. Since the pivot positions of the frame shaft support drive members are fixed (do not change) regardless of the rotational movement of the work frame 30 around the frame rotation axis O2, the core-to-core distance in the belt drive mechanism and the chain drive mechanism having the left work unit input shaft 115 or the double pulley 275 as a rotating member on one end side can be made constant regardless of the rotational movement of the work frame 30. Thereby, since the arrangement of the drive system does not change even when the work frame 30 moves up and down, the configurations of the drive mechanisms 600, 700 can be simplified.

[0384] Specifically, in the fourth belt drive mechanism 113 including a pulley supported by the left work unit input shaft 115, the fifth belt drive mechanism 117, the second chain drive mechanism 119 including a sprocket supported by the left work unit input shaft 115, and each of the sixth belt drive mechanism 128 and the seventh belt drive mechanism 131 including each pulley portion of the double pulley 275, the core-to-core distance can be made constant regardless of the rotational movement of the work frame 30. Here, the "core-to-core distance" is the distance (axial distance) between the axis of the input-side shaft and the axis of the output-side shaft in each drive mechanism.

[0385] When the core distance in the transmission mechanism changes as the work frame 30 rotates, in order to maintain the power transmission state, a driving force from, for example, a hydraulic pressure or a motor may be separately required. In this regard, with a configuration in which shaft support members are arranged coaxially with the frame rotation axis O2 on both the left and right sides of the work frame 30, the core distance in each transmission mechanism can be prevented from changing even when the work frame 30 rotates, eliminating the need for a separate driving force such as hydraulic pressure, and thus the configuration of the drive mechanism can be simplified.

[0386] Also, the left working part input shaft 115 of the first drive mechanism 600 is provided on the left side of the rotation support frame part 211 of the work frame 30 and receives the input of the power of the vehicle speed synchronized rotation, and the double pulley 275 of the second drive mechanism 700 is provided on the right side of the rotation support frame part 211 and receives the input of the power of the vehicle speed non-synchronized rotation (constant speed rotation).

[0387] According to such a configuration, two types of drive systems of the first drive mechanism 600 and the second drive mechanism 700 can be arranged with a simple configuration. Also, the drive systems for each device group of a device suitable for being driven by the power of the vehicle speed synchronized rotation such as the drawing and conveying device 24 and a device suitable for being driven by the power of the vehicle speed non-synchronized rotation such as the scraping reel 21 and the excavation device 23 can be arranged with a simple configuration.

[0388] Also, the rotational power for the device to be driven in a vehicle speed synchronized manner and the rotational power for the device to be driven in a vehicle speed non-synchronized manner are configured to be separately input by the frame shaft support drive members arranged on both the left and right sides of the rotation support frame part 211. According to such a configuration, for example, compared with a configuration in which a common rotational power is input to both, it is possible to suppress an increase in the torque required for the input rotational power. As a result, there is no need to cope with excessive torque, and the power transmission mechanism can be simplified.

[0389] Also, according to a configuration in which rotational power common to a device for driving in synchronization with the vehicle speed and a device for driving out of synchronization with the vehicle speed is input, it is necessary to deal with differences in speed and differences in rotational direction with respect to the rotational power, and the structure becomes complicated. However, according to a configuration in which the input system is divided left and right according to the input power as in the present embodiment, the speed difference and the rotational direction with respect to the rotational power can be set separately, and the power transmission mechanism can be simplified.

[0390] Further, by driving each device of the conveyance cutting unit 40 such as the pulling conveyance device 24 in synchronization with the vehicle speed, the conveyance posture of the garlic 2 can be maintained in a constant posture according to the vehicle speed, so that defects such as poor cut length of the foliage part 2b by the foliage cutting device 26 can be suppressed.

[0391] On the other hand, with respect to the digging-up device 23, by driving it at a constant rotation as being out of synchronization with the vehicle speed, the earth-collapse blade 55 can be driven to swing back and forth at a constant speed in the digging-up device 23, and stable earth and sand pulverization performance can be obtained regardless of the vehicle speed. Similarly, with respect to the scraping reel 21, by driving it at a constant rotation as being out of synchronization with the vehicle speed, the scraping reel 21 can be rotated at a constant speed, and stable foliage scraping-up performance can be obtained regardless of the vehicle speed.

[0392] Also, regarding the driving force synchronized with the vehicle speed, since the pulley 109a constituting the third belt transmission mechanism 109 is connected to the first intermediate shaft 108 via a one-way clutch (see FIG. 5), when the vegetable harvester 1 moves backward (rotates reversely), power is not transmitted from the first intermediate shaft 108 to the second intermediate shaft 110, and the device for driving in synchronization with the vehicle speed can be stopped.

[0393] Regarding the driving force synchronized with the vehicle speed, the rotational power input to the pre-processing input shaft 120 is transmitted to the transfer input shaft 65 via the input-side bevel gear 122 disposed on the pre-processing input shaft 120 and the output-side bevel gear 123 provided on the transfer input shaft 65. According to such a configuration, since each transfer input shaft 65 can be driven by a pair of bevel gears, it is possible to reduce the types of parts and the cost. Further, even when the left and right support units 201 and 202 rotate around the lifting rotation shaft O1, the power transmission state from the pre-processing input shaft 120 to each transfer input shaft 65 can be maintained.

[0394] As described above, the vegetable harvester according to the present invention described using the embodiments is not limited to the above-described embodiments, and various aspects can be adopted within the scope conforming to the gist of the present invention.

[0395] In the above-described embodiment, the vegetable harvester 1 includes six transfer cutting units 40 that are floatingly supported in three rows each, but the number of transfer cutting units 40 provided in the vegetable harvester 1 is not limited. Regarding the floating support structure, for example, in a configuration including two transfer cutting units 40, each transfer cutting unit 40 may be independently floatingly supported. That is, the plurality of transfer cutting units 40 may be divided into a plurality of units including at least one transfer cutting unit 40 in the left-right direction of the machine body, and may be configured to be floatingly supported for each unit. Further, regarding the technology related to the power transmission configuration of the vegetable harvester 1, a configuration including one transfer cutting unit 40 may be used.

[0396] This technology can adopt the following configurations. Note that the configurations described below can be arbitrarily selected and combined.

[0397] (A1) A vegetable harvester for harvesting vegetables from the soil, comprising: A traveling machine body; A plurality of harvested product transfer units that are arranged in parallel in the left-right direction of the machine body with respect to the traveling machine body and transfer vegetables. The plurality of crop conveying units are divided into a plurality of units including at least one of the crop conveying units in the left - right direction of the machine body, and for each unit, the ground - clearance of the tip of the crop conveying unit is supported so as to be adjustable with respect to the traveling machine body. A vegetable harvester characterized by the above. (A2) The plurality of units are supported so as to be integrally liftable with respect to the traveling machine body. The vegetable harvester according to (A1) above, characterized by the above. (A3) The crop conveying unit includes a pulling - out and conveying device that pulls out vegetables from the soil and conveys them while clamping the foliage of the pulled - out vegetables. The vegetable harvester according to (A1) or (A2) above, characterized by the above. (A4) It is provided with a work frame that supports the plurality of crop conveying units with respect to the traveling machine body. The plurality of crop conveying units are supported so as to be swingable with respect to the work frame about a rotation axis provided at the rear of the plurality of crop conveying units. The vegetable harvester according to any one of (A1) to (A3) above, characterized by the above. (A5) Each unit is provided with a ground - clearance adjusting mechanism for adjusting the ground - clearance of one or a plurality of the crop conveying units constituting the unit. The vegetable harvester according to any one of (A1) to (A4) above, characterized by the above. (A6) The work frame is supported so as to be rotatable about a frame rotation axis with respect to the traveling machine body. The vegetable harvester according to (A4) above, characterized by the above. (A7) The work frame is provided with a support device that supports the plurality of units from below. The plurality of units are provided so as to be lifted and rotated about the frame rotation axis in conjunction with the upward rotation of the work frame with respect to the traveling machine body by receiving an action from the support device. The vegetable harvester according to (A6), characterized in that. (A8) It is provided in front of the traveling machine body and is provided with a foliage raising device for raising the foliage of vegetables. The foliage raising device is supported so as to be able to move up and down with respect to the work frame. The vegetable harvester according to any one of (A4), (A6), and (A7), characterized in that.

[0398] (B1) A vegetable harvester for harvesting vegetables from the soil, comprising: a traveling machine body; a pulling and conveying device provided with respect to the traveling machine body for pulling out and conveying vegetables from the soil; a soil collapsing part for collapsing the soil near the vegetables to be pulled out by the pulling and conveying device; a soil collapse support part for supporting the soil collapse part at a position below the pulling and conveying device. The soil collapse part has a soil collapse member extending in the left - right direction of the machine body. The soil collapse support part is provided within the range of the extension of the soil collapse member in the left - right direction of the machine body. A vegetable harvester, characterized in that. (B2) A vegetable harvester for harvesting vegetables from the soil, comprising: a traveling machine body; a plurality of pulling and conveying devices arranged in parallel in the left - right direction of the machine body with respect to the traveling machine body for pulling out and conveying vegetables from the soil; a soil collapsing part for collapsing the soil near the vegetables to be pulled out by the plurality of pulling and conveying devices; a soil collapse support part for supporting the soil collapse part at a position below the plurality of pulling and conveying devices. The soil collapse part has a soil collapse member extending in the left - right direction of the machine body. The landslide support part is configured to extend along the front-rear direction in plan view, and is provided at a position between adjacent ones of the plurality of extraction and conveyance devices in the left-right direction. A vegetable harvester characterized by the above. (B3) A vegetable harvester for harvesting vegetables from soil, a traveling machine body, an extraction and conveyance device provided with respect to the traveling machine body for extracting and conveying vegetables from the soil, a landslide part for collapsing soil near the vegetables to be extracted by the extraction and conveyance device, and a landslide support part for supporting the landslide part at a position below the extraction and conveyance device. The landslide part has a landslide member extending in the left-right direction of the machine body, and the landslide member is a plate-like member having left and right sides as edges. A vegetable harvester characterized by the above. (B4) The vegetable harvester includes a work frame that supports the extraction and conveyance device so as to be liftable with respect to the traveling machine body, and the landslide support part supports the landslide part with respect to the work frame. The vegetable harvester according to any one of (B1) to (B3) above, characterized by the above. (B5) The landslide member is provided in a range covering the plurality of extraction and conveyance devices in the left-right direction of the machine body. The vegetable harvester according to any one of (B1) to (B3) above, characterized by the above. (B6) The landslide support part includes a swing mechanism part forming a four-bar link mechanism, and is configured to reciprocate the landslide member by the swing mechanism part. The vegetable harvester according to any one of (B1) to (B3) above, characterized by the above.

[0399] (C1) A vegetable harvester for harvesting vegetables from soil, a traveling machine body, one or a plurality of harvested product conveyance parts for conveying vegetables, a working frame that supports the harvested product conveying unit with respect to the traveling machine body; a drive mechanism for transmitting the power of a drive source for driving the traveling machine body is arranged on both sides in the left - right direction of the machine body with respect to the working frame A vegetable harvester characterized by the above. (C2) As the drive mechanism, a first drive mechanism that is arranged on one side in the left - right direction of the machine body with respect to the working frame and transmits the power of synchronous rotation synchronized with the vehicle speed of the traveling machine body; a second drive mechanism that is arranged on the other side in the left - right direction of the machine body with respect to the working frame and transmits the power of non - synchronous rotation that is not synchronized with the vehicle speed of the traveling machine body; The vegetable harvester according to (C1) above, characterized by the above. (C3) The working frame is supported so as to be vertically rotatable about a rotation axis having the left - right direction of the machine body as the axial direction with respect to the traveling machine body The vegetable harvester according to (C1) or (C2) above, characterized by the above. (C4) Each of the drive mechanisms of the first drive mechanism and the second drive mechanism has a frame - shaft support drive member that is arranged coaxially with the rotation axis and receives the transmission of the power of the drive source to perform rotational drive The vegetable harvester according to (C3) above, characterized by the above. (C5) The working frame has a rotation support frame portion that constitutes the shaft support of the working frame by the rotation axis, The frame - shaft support drive member of the first drive mechanism is provided on one side in the axial direction of the rotation support frame portion, receives the input of the power of the synchronous rotation, The frame - shaft support drive member of the second drive mechanism is provided on the other side in the axial direction of the rotation support frame portion, receives the input of the power of the non - synchronous rotation The vegetable harvester according to (C4) above, characterized by the above.

Explanation of reference numerals

[0400] 1 Vegetable harvester 2 Garlic (vegetable) 3 Traveling body 10 Engine (driving source) 21 Scratching reel (stem and leaf lifting device) 22 Weeding body 24 Pulling and conveying device 30 Working frame 40 Conveying and cutting unit (harvested product conveying section) 52 Weeding body support part (ground height adjusting mechanism) 55 Earth collapse blade (earth collapse member) 115 Left working part input shaft (frame shaft support driving member) 201 Left support unit (unit) 202 Right support unit (unit) 211 Rotating support frame part 230 Frame support part 275 Double pulley (frame shaft support driving member) 360 Gauge wheel (ground height adjusting mechanism) 410 Auxiliary device (support device) 500 Earth collapse part 501 Earth collapse support part 510 Oscillating mechanism part 600 First driving mechanism 700 Second driving mechanism O1 Lifting rotation axis line O2 Frame rotation axis line (frame rotation axis)

Claims

1. A vegetable harvester for harvesting vegetables from soil, comprising: A traveling body; A plurality of harvested product conveying units that are arranged in parallel in the left - right direction of the machine body with respect to the traveling body and convey vegetables; The plurality of harvested product conveying units are divided into a plurality of units including at least one of the harvested product conveying units in the left - right direction of the machine body, and for each unit, the ground clearance of the tip of the harvested product conveying unit is supported so as to be adjustable with respect to the traveling body. A vegetable harvester characterized by the above.

2. The plurality of units are supported so as to be integrally liftable with respect to the traveling body. The vegetable harvester according to claim 1, characterized by the above.

3. The harvested product conveying unit includes a pulling - out conveying device that pulls out vegetables from the soil and conveys them while clamping the foliage part of the pulled - out vegetables. The vegetable harvester according to claim 1 or claim 2, characterized by the above.

4. It is provided with a working frame that supports the plurality of harvested product conveying units with respect to the traveling body. The plurality of harvested product conveying units are supported so as to be swingable with respect to the working frame about a rotation axis provided at the rear part of the plurality of harvested product conveying units. The vegetable harvester according to claim 1, characterized by the above.

5. Each unit is provided with a ground clearance adjusting mechanism for adjusting the ground clearance of one or a plurality of the harvested product conveying units that constitute the unit. The vegetable harvester according to claim 1, characterized by the above.

6. The working frame is supported so as to be rotatable about a frame rotation axis with respect to the traveling body. The vegetable harvester according to claim 4, characterized by the above.

7. A support device for supporting the plurality of units from below is provided on the working frame. The plurality of units are provided so as to rotate upward about the frame rotation axis in conjunction with the upward rotation of the working frame with respect to the traveling body by receiving an action from the support device. The vegetable harvester according to claim 6, characterized by the above.

8. It is provided with a foliage lifting device in front of the traveling body for lifting the foliage part of vegetables. The foliage lifting device is supported so as to be liftable with respect to the working frame. The vegetable harvester according to claim 4, characterized by the above.

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