JP6861106B2 - Green onion harvester - Google Patents

Description

The present invention relates to a green onion harvester, specifically, a green onion harvester provided with a self-propelled traveling machine and a harvesting unit for digging up and harvesting green onions from the ridges where green onions are cultivated.

Conventionally, as one form of a green onion harvester for harvesting green onions planted in ridges, there is one disclosed in Patent Document 1, and in Patent Document 1, each working part is arranged on the machine body to harvest green onions. A green onion harvester that enables a series of harvesting operations up to this point is disclosed. The green onion harvester disclosed in Patent Document 1 has, as each working part, a digging part for digging up the green onion, a transporting part for transporting the green onion dug up by the digging part to the rear, and a rhizome part of the green onion while being transported by the transporting part. It is provided with a scraping portion for scraping off the adhering soil mass. Further, in front of the digging portion, a ridge shoulder breaking portion for breaking both shoulders of the ridge is provided.

Japanese Unexamined Patent Publication No. 2015-177761

The green onion harvester harvests green onions while traveling through the grooves between the ridges so as to straddle the ridges, but the depth of the grooves between the ridges may differ on both sides of the ridges, in which case the aircraft tilts. If the green onions are harvested while the aircraft is tilted, the ridged shoulders may damage the green onions.

Therefore, in view of the above problems, it is an object of the present invention to provide a green onion harvester capable of harvesting green onions without damaging the green onions even when the depths of the grooves between the ridges are different on both sides of the ridges. To do.

The green onion harvester of the present invention is a green onion harvester equipped with a self-propelled traveling machine and a harvesting section for digging and harvesting green onions from the ridges where green onions are cultivated.
The traveling machine body includes a body frame and a pair of traveling parts arranged on both sides of the body frame.
One of the traveling portions of the pair of traveling portions is provided with a height adjusting mechanism capable of adjusting the height from the traveling surface to be grounded to the airframe frame.
The mission case connected to the axle that drives the traveling unit is arranged on the other traveling unit side of the airframe, and the hydraulic cylinder that operates the height adjustment mechanism is the one traveling unit and the mission case. It is characterized in that it is arranged between.

In the present invention, the height adjusting mechanism connects a pair of front and rear link arms swingably supported by the airframe and a track frame arranged below the airframe, and the pair of link arms. The hydraulic cylinder may be connected to the upper end side of any one of the pair of link arms.

Further, in the present invention, the hydraulic cylinder may be arranged above the axle.

According to the present invention, since one of the pair of traveling portions arranged on both sides of the machine frame has a height adjusting mechanism, the depth of the groove between the ridges may be different on both sides of the ridge. However, by adjusting the inclination of the traveling machine, it is possible to harvest the green onions without damaging them.

Further, the height adjusting mechanism is provided by arranging a hydraulic cylinder for operating the height adjusting mechanism in the space formed between the mission case arranged on the other traveling portion side and the one traveling portion. Even in this case, it is possible to prevent the traveling machine from becoming large.

Perspective view of the green onion harvester of this embodiment Left side view of the green onion harvester of this embodiment Right side view of the green onion harvester of this embodiment Plan view of the green onion harvester of this embodiment Front view of the green onion harvester of this embodiment Rear view of the green onion harvester of this embodiment Longitudinal section of the green onion harvester of the present embodiment Side view of height adjustment mechanism Perspective view of height adjustment mechanism Cross-sectional view of the traveling aircraft Explanatory drawing of height adjustment mechanism A view of the traveling portion shown in FIG. 11 as viewed from above. Explanatory drawing of height adjustment mechanism Perspective view of the seat holding device Perspective view showing the main part of the seat holding device Front view of seat holding device Front view of seat holding device

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 7A are green onion harvesters according to the present embodiment, FIG. 1 is a perspective view of the green onion harvester A, FIG. 2 is a left side view of the green onion harvester A, and FIG. 3 is a green onion harvester. Right side view of A, FIG. 4 plan view of green onion harvester A, FIG. 5 front view of green onion harvester A, FIG. 6 rear view of green onion harvester A, FIG. 7 vertical sectional view of green onion harvester A. Is. As shown in FIGS. 1 to 6, the green onion harvester A includes a self-propelled traveling machine 1 and a harvesting unit 2 for digging up and harvesting the green onion N from the ridge U where the green onion N is cultivated. In the present embodiment, the green onion N is a long onion having a rhizome portion Na and a leaf portion Nb. In the following description, the left side of the traveling aircraft 1 in the forward direction is simply referred to as the left side, and similarly, the right side in the forward direction is simply referred to as the right side.

[Structure of traveling aircraft]
The traveling machine body 1 includes a body frame 11 formed in a three-dimensional frame shape, and a pair of crawler-type traveling parts 10 and 10 arranged on both sides of the body frame 11. The engine 12 is mounted on the rear right side of the fuselage frame 11 so as to be positioned rearward and above the traveling portion 10 on the right side, and the driving force of the engine 12 is transmitted to the traveling portions 10 and 10 in the lower part of the airframe frame 11. The case 13 is arranged between the pair of left and right traveling portions 10, 10. The mission case 13 is arranged at the rear right side of the fuselage frame 11, that is, on the right side of the traveling portion 10. On the upper right side of the machine frame 11, an operation unit 14 for steering / shifting the traveling units 10 and 10 and performing the harvesting operation of the harvesting unit 2 is arranged. At the rear end of the machine frame 11, a horizontal plate-shaped boarding step portion 24 on which an operator is boarded is arranged so as to project rearward. 15 is a main shift lever, 16 is a traveling / working lever, 17 is a left side clutch lever, 18 is a right side clutch lever, and 19 is an accelerator lever.

The boarding step portion 24 has a fixed side step piece 94 in the front half portion and a movable side step in the latter half portion in which the front end edge portion is pivotally connected to the rear end edge portion of the fixed side step piece 94 via the pivot support connecting portion 96. It is composed of a piece 95. The fixed-side step piece 94 has a front end edge fixed to a step stay 97 provided at the lower part of the rear end of the airframe frame 11 so as to project horizontally toward the rear. The movable side step piece 95 can change its posture by rotating around the pivot connecting portion 96 between a used posture that horizontally projects rearward and a non-used posture that stands upright.

[Structure of harvesting department]
The harvesting section 2 includes a pair of left and right ridge shoulder breaking sections 60, 60, a digging section 20, a transport section 21, a scraping section 22, and a posture changing / aligning section 23 as each working section. .. The pair of left and right ridge shoulder breaking portions 60, 60 break both shoulder portions of the ridge U to reduce the entry resistance of the digging portion 20 into the ridge U. Welsh onion N is cultivated in the ridge U whose entry resistance is reduced in this way, and this green onion N is dug up by the digging portion 20. The transport unit 21 sandwiches the middle portion of the leaf portion Nb of the green onion dug up by the digging portion 20, and transports the sandwiched green onion N in the upright posture toward the rear and upper direction. The scraping unit 22 scrapes off the soil mass adhering to the rhizome portion Na of the green onion N transported by the transport unit 21. The posture change / alignment unit 23 inherits the green onion N transported in the standing posture from the terminal portion of the transport unit 21, and also sandwiches the middle portion of the inherited green onion N to move the sandwiched green onion N from the standing posture to the outside. Transport toward the left rear and upper while changing and aligning the posture to the forward leaning posture tilted forward. The digging section 20, the transport section 21, and the scraping section 22, which are the working sections, are arranged in front of the traveling machine body 1 on a virtually identical straight line L extending in the front-rear direction, and behind these working sections. Moreover, the boarding step portion 24 is arranged on the virtually identical straight line L.

The digging portion 20 pivotally supports the base end portion of the rectangular frame-shaped support frame 30 formed by extending in the front-rear direction to the airframe frame 11 via a pivot 31 whose axis is directed in the left-right direction, and supports the support frame. A so-called bar conveyor, a digging conveyor 32, is mounted on the body 30, and a digging blade 33 is attached to the starting end portion (front end portion) of the digging conveyor 32 in a protruding shape toward the front. An elevating cylinder 37 that expands and contracts in the front-rear direction is laid horizontally between the cylinder stay 35 provided on the machine frame 11 and the elevating arm 36 erected upward from the middle part of the pivot 31, and the elevating arm 36 A continuous piece 39 is interposed between the base end portion and the left and right extension pieces 30a of the support frame body 30. The digging portion 20 can be lifted and lowered by the elevating cylinder 37, and the transporting portion 21 and the scraping portion 22 are also configured to be integrally raised and lowered with the digging portion 20. Reference numeral 38 denotes a lifting / lowering operation lever for raising / lowering the digging portion 20 and the like.

In the digging portion 20 configured in this way, when harvesting the green onions N, the digging portion 20 is appropriately lowered by the elevating cylinder 37, and the digging conveyor 32 is arranged in an inclined posture of front low and rear height. At the same time, the tip end side half of the digging blade 33 is arranged close to the field G surface substantially horizontally. In such a state, as the traveling machine 1 travels forward, the tip side half of the digging blade 33 enters the ridge U where the green onion N is cultivated substantially horizontally toward the front. The green onion N is dug up from directly below the rhizome portion Na of the green onion N, and the base end side half of the digging blade 33 transfers the green onion N rearward and upward together with the soil mass. Then, the dug up green onion N is transferred backward and upward while sliding on the upper surface of the base end side half of the dug up blade 33, and the leaf portion Nb of the green onion N is sandwiched by the transporting portion 21 described later and moved upward and backward. On the other hand, the rhizome portion Na of the green onion N to which the soil mass is attached is delivered from the base end side half of the digging blade 33 onto the digging conveyor 32, and is further conveyed rearward and upward by the digging conveyor 32. At this time, the green onion N is transported backward and upward while maintaining the standing posture cultivated in the ridge U.

The transport unit 21 is arranged in an inclined shape of front low and rear height in parallel with the digging conveyor 32 of the digging part 20 directly above the digging part 20, and the middle part of the green onion N in the upright posture dug up is lateral to the left and right. It is designed to be transported upward and backward while being pinched from the top. That is, the transport unit 21 is arranged so as to face each other in parallel directly above the digging conveyor 32 via a pair of left and right front and rear support frames 40 and 41. The transport unit 21 is configured by disposing a pair of left and right transport bodies 42, 42 extending in the front-rear direction. The transport body 42 is formed by winding a transport belt 45 around a driven pulley 43 and a drive pulley 44 arranged at intervals in the front-rear direction. The transport belts that transport the transport belts 42, 42 from the start end (front end) to the end (rear end) of the two transport bodies 42, 42 that face each other on the left and right are brought into surface contact with each other in a face-to-face state. The outbound belt side portions 45a and 45a sandwich the leaf portion Nb of the green onion N, and the green onion N is conveyed rearward and upward in the sandwiched state.

The front support frame 40 on the left side is extended in the vertical direction and is interposed between the left side portion of the digging conveyor 32 and the front portion of the transport body 42 on the left side. Similarly, the front support frame 40 on the right side is extended in the vertical direction and is interposed between the right side portion of the digging conveyor 32 and the front portion of the transport body 42 on the right side. A pair of left and right drive shaft cases 48, 48 that pivotally support a pair of left and right pulley drive shafts 85, 85 are erected on the left and right side portions of the transmission horizontal shaft case that pivotally supports the transport portion transmission horizontal shaft 170. The left rear support frame 41 is interposed between the rear portion of the left carrier 42 and the left front portion of the airframe frame 11 in an oblique manner. Similarly, the rear support frame 41 on the right side is interposed between the rear portion of the transport body 42 on the right side and the front portion on the right side of the airframe frame 11 in an oblique manner. Reference numeral 49 denotes a tension roller that elastically biases the outbound side portion 45a of the transport belt.

In the transport unit 21 configured in this way, the transport belt outbound side portions 45a, 45a of the pair of left and right transport bodies 42, 42 sandwich the leaf portion Nb of the green onion N, and the green onion N is moved backward and upward in the sandwiched state. Since the green onion N is transported, the green onion N is steadily transported backward and upward in an upright posture in cooperation with the digging conveyor 32 of the digging portion 20 that supports and transports the rhizome portion Na of the green onion N from below. be able to.

The scraping portion 22 horizontally lays a horizontal axis case 50 extending in the left-right direction on the body frame 11, extends the chain case 51 from the right side portion of the horizontal axis case 50 toward the front and lower directions, and extends the tip of the chain case 51. The shaft case is projected from the portion (front end portion) toward the left side, and the rotating body 54 is coaxially attached to the tip end portion of the rotating body support shaft 53 mounted in the shaft case. The rotating body 54 is formed of a cylindrical peripheral wall whose axis is oriented in the left-right direction and left and right end walls that block the left and right end faces of the peripheral wall, and the tip of the rotating body support shaft 53 is located at the center of the left and right end walls. It is attached by penetrating the part. That is, the rotating body 54 is arranged with its axis oriented in a direction orthogonal to the transport direction of the transport unit 21, and is rotatable around the axis via the rotating body support shaft 53.

On the outer peripheral surface of the peripheral wall of the rotating body 54, a large number of scraping projecting pieces 57 are radially projected at intervals in the circumferential direction and the axial direction, and each projecting piece 57 is a tip portion thereof. The protrusion height of each projecting piece 57 is changed so as to be along the rhizome portion Na. That is, in the present embodiment, eight projecting pieces are projected at the same interval in the circumferential direction of the outer peripheral surface of the peripheral wall 55 to form a projecting piece unit, and the same spacing is provided in the axial direction of the peripheral wall 55. Five sets of projectile units are formed.

The posture change / aligning unit 23 inherits the green onion N that is conveyed backward and upward by the transport unit 21 at a position immediately after the transport unit 21, and tilts the inherited green onion N outward from the standing posture. The posture is changed to the tilted posture, and the green onions N are arranged so as to be aligned with each other so that the green onions N are transported toward the rear upper side on one side (the rear upper side on the left side in the present embodiment) while changing the posture and aligning.

That is, the posture change / alignment portion 23 is configured by arranging a pair of left and right transfer bodies 80, 80 extending in the front-rear direction so that the front low and the rear height are high and the rear end portion faces outward on the left side. There is. The transfer body 80 is formed by winding a transfer belt 83 around a drive pulley 81 and a driven pulley 82 arranged at intervals in the front-rear direction, and is formed by winding a transfer belt 83 at the start end portions (front ends) of the transfer bodies 80, 80 facing each other on the left and right sides. The transfer belt outbound side portions 83a and 83a transferred from the portion) to the end portion (rear end portion) are brought into surface contact with each other in a face-to-face state. The drive pulleys 81 and 81 are arranged so that their axes are oriented in the vertical direction, while the driven pulleys 82 and 82 are arranged so that their axes are tilted in the inclination direction of left high and right low (for example, 45 °). , The middle of the transfer belt outbound side portions 83a and 83a are brought into surface contact in a twisting manner. The drive pulley 44 of the left transfer body 42 and the drive pulley 81 of the left transfer body 80 are arranged at the upper end and the middle portion of the left pulley drive shaft 85 arranged so that the axes are oriented in the vertical direction as shown in FIG. It is installed coaxially. The drive pulley 44 of the transport body 42 on the right side is interlocked with the upper end of the pulley drive shaft 85 on the right side arranged so that the axes are directed in the vertical direction via a chain case, and the drive pulley 81 of the transport body 80 on the right side is linked. , It is attached to the middle part of the pulley drive shaft 85 on the right side. Then, in the posture change / alignment unit 23 that inherits the green onion N from the terminal portion of the transport unit 21, the transfer belt outbound side portions 83a and 83a sandwich the leaf portion Nb of the green onion N, and the green onion N is sandwiched. They are aligned while changing their posture from a standing posture to a tilted posture, and are transported upward on the left rear side. Reference numeral 87 denotes a holding frame body that holds the posture so that the leaf tip side of the green onion N transferred by the posture changing / aligning portion 23 does not hang down.

In the posture change / alignment unit 23 configured in this way, the posture of the green onion N can be changed from the standing posture to the tilted posture. Therefore, the green onions N are sequentially and steadily collected by the collecting unit 25 described later. Can be stored.

A rectangular plate-shaped collecting unit 25 for collecting green onions N is arranged at a position below the rear of the posture changing / aligning unit 23, and the green onions N whose posture is changed / aligned by the posture changing / aligning unit 23 are collected in the collecting unit 25. I am trying to collect it. Then, the front end edge portion of the collecting unit 25 is arranged below the end portion of the posture changing / aligning unit 23, and the green onion N conveyed by the posture changing / aligning unit 23 is dropped onto the collecting unit 25 and collected. It is designed to be stored.

That is, the collecting unit 25 is attached to the airframe frame 11 via the collecting unit support arm 90. The collecting portion support arm 90 is formed of a vertically extending arm piece 91 whose axis is directed in the vertical direction and a front-rear extending arm piece 92 whose axis is directed in the front-rear direction from the upper end of the vertically extending arm piece 91. A mounting frame 93 is provided on the front-rear extension arm piece 92 so as to project outward on the left side, and a lower surface portion of the collecting portion 25 is attached to the mounting frame 93. A cylindrical support portion 98 whose axis is directed in the vertical direction is provided at the left rear end portion of the machine body frame 11, and the collecting portion support arm 90 has a vertically extending arm piece 91 placed in the cylindrical support portion 98 from above. It is inserted and rotatably attached around its axis. The collecting unit 25 changes its posture between a lying posture (posture shown in FIG. 2) and a hanging non-use posture (not shown) in the lateral axis rotation direction a of the front-rear extension arm piece 92 whose axis is directed in the front-rear direction. It is possible to use the position (position shown in FIG. 2) arranged on one side (left side in this embodiment) of the vertically extending arm piece 91 whose axis is directed in the vertical direction in the vertical direction b. , The position can be changed from the storage position (not shown) placed immediately after the aircraft in a hanging posture. Therefore, the movable step piece 95 of the boarding step portion 24 is placed in an unused posture in which the movable step piece 95 is erected upward, and the collecting unit 25 is placed in a storage position in a hanging non-use posture at a position immediately after the movable step piece 95. By arranging it, the green onion harvester A can be stored compactly. Further, on the right side opposite to the left side on which the collecting unit 25 is arranged, an operating unit 14 for operating each working unit of the traveling machine body 1 and the harvesting unit 2 is provided with the boarding step unit 24 sandwiched between them. It is arranged.

In the collecting unit 25 configured in this way, the harvested green onions N are piled up on the collecting unit 25 in a lying position on the left side of the worker who stands on the boarding step unit 24 and is manipulating and harvesting. Since it can be collected steadily, it is possible to ensure good collection performance of green onion N and maneuvering / harvesting operation performance of workers.

A pair of left and right ridge-shoulder breaking devices 60, 60, which are a part of the harvesting portion 2, are arranged in front of the digging portion 20. The ridge shoulder breaking devices 60, 60 break both shoulders of the ridge U to reduce the entry resistance of the subsequent digging portion 20, so that the digging work by the digging portion 20 can be smoothly performed. That is, in the ridge shoulder breaking devices 60, 60, the base end portions (rear end portions) of the front extension shaft cases 61, 61 extending forward are attached to the left and right side portions of the horizontal axis case 50, and each front extension shaft is attached. Gear cases 62,62 are attached to the tips (front ends) of the cases 61, 61, mounting discs 64, 64 are attached to the gear cases 62, 62 via the disc support shafts, and 6 is attached to each mounting disc 64, 64. The ridge-shoulder-breaking claws 65, 65 of each book are projected at regular intervals in the circumferential direction. A front extension shaft is mounted in the front extension shaft case 61, and a disc support shaft is interlocked and connected to the front extension shaft via a gear in the gear case 62. Then, by rotating the ridge shoulder breaking claw 65 projecting from the mounting disk 64 in the upper cut direction (clockwise in FIG. 2), the ridge shoulder breaking claw 65 can break the shoulder portion of the ridge U. I have to. 69 is a shatterproof cover, and 70 is a soil mass crushing rod. Reference numeral 71 is a gauge wheel for determining the height of the front end portion of the harvesting portion 2, 72 is a gauge wheel support, and 73 is a gauge wheel support machine frame.

[Structure of running unit]
Next, the configuration of the traveling unit 10 will be described with reference to FIGS. 8 to 12. FIG. 8 is a side view for explaining the configuration of the traveling portion 10 on the left side. FIG. 9 is a perspective view for explaining the configuration of the traveling portion 10 on the left side. FIG. 10 is a cross-sectional view of the traveling machine body 1 with the harvesting portion 2 removed. At least one of the pair of traveling units 10 and 10 of the present invention has a height adjusting mechanism capable of adjusting the height from the grounded traveling surface 10a to the machine frame 11. In the present embodiment, the traveling portion 10 on the left side is provided with a height adjusting mechanism.

The traveling unit 10 includes a drive sprocket 101 pivotally supported by the body frame 11, a plurality of track rollers 103 and a front idler 104 pivotally supported by a track frame 102 arranged below the body frame 11, and a body frame 11. A traveling crawler comprising a rear idler 105 pivotally supported by the truck and an endless belt 106 rotated by a drive sprocket 101.

The drive sprocket 101 is fixed to both ends of the axle 131 extending to the left and right from the mission case 13, and can transmit the power of the engine 12 to the traveling unit 10. The track frame 102 is arranged below the airframe frame 11 and extends in the front-rear direction in parallel with the airframe frame 11. The track frame 102 is provided with a front idler 104 on the front side, and a plurality of track rollers 103 for holding the endless belt 106 on the grounding side in a grounded state behind the front idler 104.

The rear idler 105 is provided rearward and below the drive sprocket 101. The rear idler 105 is rotatably fixed to the fuselage frame 11. By providing the rear idler 105 fixed to the fuselage frame 11 behind and below the drive sprocket 101, the length between the drive sprocket 101 and the front idler 104 (L1) and the rear facing L1. By relatively adjusting the length (L2) between the idler 105 and the rearmost track roller 103 by moving the aircraft frame 11 up and down, the circumference of the crawler is not changed without changing the ground contact length of the traveling surface 10a. The length (the length of the endless belt 106) can be maintained. More specifically, at the uppermost position of FIG. 11, which will be described later, L1 is shorter than the standard state of FIG. 8 and L2 is longer than the standard state of FIG. 8, while at the lowermost position of FIG. 12, L1 is The circumference of the crawler can be maintained by making it longer than the standard state of FIG. 8 and L2 shorter than the standard state of FIG.

The height adjusting mechanism is composed of a link mechanism that is swingably supported by the airframe frame 11 and the track frame 102. Specifically, the height adjustment mechanism includes a pair of front and rear link arms (front link arm 107 and rear link arm 108) that are swingably supported by the airframe frame 11 and the track frame 102, and a pair of link arms. It has a connecting rod 109 that connects them to each other. The height of the traveling portion 10 on the left side can be adjusted from the traveling surface 10a to the aircraft frame 11 by changing the distance between the body frame 11 and the track frame 102. In the present embodiment, the traveling portion 10 on the right side does not have a height adjusting mechanism because the track frame 102 is fixed to the body frame 11.

The front link arm 107 rotates around the front fulcrum shaft 111a of the front bracket 111 fixed to the front side of the airframe frame 11. The tip end side (front end side) of the front link arm 107 is rotatably connected to the track frame 102 via the connecting shaft body 107a.

The rear link arm 108 rotates around the rear fulcrum shaft 112a of the rear bracket 112 fixed to the rear side of the fuselage frame 11. The rear fulcrum shaft 112a is located at substantially the same height as the rear idler 105 and is located in front of the rotation axis of the rear idler 105. The front end side (front end side) of the rear link arm 108 is rotatably connected to the track frame 102 via the connecting shaft body 108a. The connecting shaft body 108a is located in front of the rearmost track roller 103.

The rear link arm 108 is shorter than the front link arm 107, and is configured so that the rear link arm 108 and the hydraulic cylinder 110 described later do not come into contact with each other.

The connecting rod 109 is arranged below the axle 131 and extends in the front-rear direction. The length of the connecting rod 109 can be adjusted by a turnbuckle. The front end side of the connecting rod 109 is rotatably connected to the front link arm 107 via the shaft body 109a. The shaft body 109a is located above the front fulcrum shaft 111a. Further, the rear end side of the connecting rod 109 is rotatably connected to the upper end of the rear link arm 108 via the shaft body 109b. The shaft body 109b is located above the rear fulcrum shaft 112a.

The hydraulic cylinder 110 expands and contracts in the front-rear direction to operate the height adjusting mechanism of the traveling portion 10. The hydraulic cylinder 110 is arranged between the front link arm 107 and the rear link arm 108 in the front-rear direction. The hydraulic cylinder 110 is rotatably connected to a cylinder support bracket 113 provided on the machine frame 11 via a base shaft body 113a. Further, the piston rod 110a of the hydraulic cylinder 110 is rotatably connected to the upper end of the front link arm 107 via the front end side shaft body 107b. By arranging the hydraulic cylinder 110 between the front link arm 107 and the rear link arm 108 and oscillatingly connecting the hydraulic cylinder 110 to the upper end side of the front link arm 107, it is possible to prevent the traveling portion 10 from becoming long in the front-rear direction. ..

Further, the hydraulic cylinder 110 is arranged above the axle 131. As a result, the front link arm 107 can be lengthened, so that the swing range of the front link arm 107 can be increased and the height adjustment width can be increased.

Further, as shown in FIG. 10, the hydraulic cylinder 110 is arranged on one traveling portion 10 side of the airframe frame 11, or on the left traveling portion 10 side in this embodiment. The mission case 13 is arranged on the other traveling portion 10 side of the body frame 11, and in the present embodiment, on the right traveling portion 10 side. The hydraulic cylinder 110 is arranged between the traveling portion 10 on the left side and the transmission case 13. Further, the elevating cylinder 37 for raising and lowering the digging portion 20 and the like is arranged on one traveling portion 10 side of the machine frame 11, or on the left traveling portion 10 side in this embodiment. That is, the hydraulic cylinder 110 and the elevating cylinder 37 are arranged on the traveling portion 10 side on the left side of the airframe frame 11, and the mission case 13 is arranged on the traveling unit 10 side on the right side of the airframe frame 11. As a result, even when the height adjusting mechanism is provided, each member can be efficiently arranged in the limited space in the machine body frame 11, so that it is possible to prevent the traveling machine body 1 from becoming large.

FIG. 11 is a side view showing a state in which the height from the traveling surface 10a to the fuselage frame 11 is maximized by the height adjusting mechanism. FIG. 11A is a view of the traveling portion 10 shown in FIG. 11 as viewed from above. FIG. 12 is a side view showing a state in which the height from the traveling surface 10a to the airframe frame 11 is minimized by the height adjusting mechanism. The traveling unit 10 on the left side can freely change the distance between the airframe frame 11 and the track frame 102 between the uppermost upper limit position in FIG. 11 and the lowermost lower limit position in FIG.

When the hydraulic cylinder 110 operates, the front link arm 107 rotates around the front fulcrum shaft 111a, and at the same time, the rear link arm 108 rotates around the rear fulcrum shaft 112a. The distance from the connecting shaft body 107a of the front link arm 107 to the front fulcrum shaft 111a is the same as the distance from the connecting shaft body 108a of the rear link arm 108 to the rear fulcrum shaft 112a, and is the same as the distance between the front link arm 107 and the rear side. The link arm 108 constitutes a so-called parallel link. Therefore, the track frame 102 moves in the vertical direction while maintaining parallelism with the airframe frame 11. The operation of the hydraulic cylinder 110 is operated by the cylinder lever 114 (see FIG. 6).

As shown in FIG. 11, when the height from the traveling surface 10a to the fuselage frame 11 is adjusted to the maximum upper limit position, as shown in FIG. 11A, a part of the rear idler 105 and a part of the track roller in a plan view. Are duplicated. In this embodiment, a part of the rear idler 105 and a part of the rearmost track roller 103 overlap. On the other hand, at the lowermost position shown in FIG. 12, the rear idler 105 and the track roller 103 do not overlap in a plan view. In this way, the upper limit height can be increased by raising the airframe frame 11 to a position where the rear idler 105 and the track roller 103 overlap. Thereby, the height adjustment width can be increased.

Further, as shown in FIG. 12, when the height from the traveling surface 10a to the fuselage frame 11 is adjusted to the lowermost position, a part of the drive sprocket 101 and a part of the rearmost track roller 103 are seen from the side view. Duplicate. On the other hand, at the upper limit position shown in FIG. 11, the drive sprocket 101 and the track roller 103 do not overlap in the side view. In this way, the lower limit height can be lowered by lowering the airframe frame 11 to a position where the drive sprocket 101 and the track roller 103 overlap. Thereby, the height adjustment width can be increased.

[Other Embodiments]
(1) In the above-described embodiment, an example in which the height adjusting mechanism is provided on the left running portion 10 is shown, but the height adjusting mechanism may be provided on the right running portion 10.

(2) In the above-described embodiment, an example is shown in which the piston rod 110a of the hydraulic cylinder 110 is rotatably connected to the upper end side of the front link arm 107. However, the hydraulic cylinder 110 may be arranged in the direction opposite to that of the above-described embodiment, and the piston rod 110a of the hydraulic cylinder 110 may be rotatably connected to the upper end side of the rear link arm 108. At this time, the upper end of the rear link arm 108 extends above the shaft body 109b.

(3) The green onion harvester A of the present invention may be provided with a horizontal indicator indicating whether or not the traveling machine 1 is horizontal. Further, the green onion harvester A has an angle detector that detects the inclination angle of the traveling machine body 1 and a height of the traveling unit 10 so that the traveling machine body 1 is horizontal based on the inclination angle detected by the angle detector. A control unit that controls the adjustment mechanism may be provided.

(4) The green onions N collected and stored in the collecting unit 25 until the amount reaches a certain amount are packaged by a sheet placed in the collecting unit 25 in advance. Since a plurality of sheets for packaging are placed on the collecting unit 25 and used one by one, it is preferable to provide a sheet holding device so that the sheets do not shift. FIG. 13 is a perspective view conceptually showing the seat holding device provided in the collecting unit 25. As shown in FIG. 13, the seat holding device includes a holding pipe 251 that rotates up and down with respect to the left frame 250 extending in the front-rear direction of the collecting unit 25, and the holding pipe 251 has a holding posture for holding the seat from above. The posture can be changed between the standing posture and the standing posture.

FIG. 14 is a perspective view showing a main part of the seat pressing device when the pressing pipe 251 is in the pressing posture. 15A is a front view of the seat holding device of FIG. 13, and FIG. 15B is a front view showing a main part of the seat holding device when the holding pipe 251 is in the standby posture.

A support member 252 is erected at the rear of the left frame 250. A pressing member 253 at the base end of the pressing pipe 251 is oscillatingly supported by a supporting shaft 254 on the upper portion of the supporting member 252. A spring 255 is stretched between the upper end of the support member 252 and the tip side of the holding member 253 with respect to the support shaft 254. When the spring direction of the spring 255 exceeds the dead center of the support shaft 254, the spring 255 rotates the pressing member 253 downward and upward by the restoring force, that is, the pressing pipe 251 is in the pressing posture and the standby posture. Let me change it.

The support member 252 is provided with a first stopper 252a that prevents the pressing member 253 from rotating in the direction further pulled by the spring 255 from the position shown in FIG. 15A, that is, in the downward direction. Further, the support member 252 is provided with a second stopper 252b that prevents the pressing member 253 from rotating in the direction further pulled by the spring 255 from the position shown in FIG. 15B, that is, in the upward direction.

A Onion Harvester N Negi Na Rhizome Nb Leaf 1 Traveling Machine 2 Harvesting 10 Running Part 10a Running Surface 11 Machine Frame 101 Drive Sprocket 102 Track Frame 103 Track Roller 105 Rear Idler 107 Front Link Arm 108 Rear Link Arm 110 Hydraulic Cylinder 131 axle

Claims (3)

It is a green onion harvester equipped with a self-propelled traveling machine and a harvesting section that digs up and harvests green onions from the ridges where green onions are cultivated.
The traveling machine body includes a body frame and a pair of traveling parts arranged on both sides of the body frame.
One of the traveling portions of the pair of traveling portions is provided with a height adjusting mechanism capable of adjusting the height from the traveling surface to be grounded to the airframe frame.
The mission case connected to the axle that drives the traveling unit is arranged on the other traveling unit side of the airframe, and the hydraulic cylinder that operates the height adjusting mechanism is the one traveling unit and the mission case. A green onion harvester characterized by being placed between. The height adjusting mechanism includes a pair of front and rear link arms that are swingably supported by the airframe frame and a track frame arranged below the airframe, and a connecting rod that connects the pair of link arms to each other. Have,
The green onion harvester according to claim 1, wherein the hydraulic cylinder is connected to the upper end side of one of the pair of link arms. The green onion harvester according to claim 1 or 2, wherein the hydraulic cylinder is arranged above the axle.

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