JP2014082969A - Root vegetable harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a root vegetable harvester having an excellent harvesting performance by precisely pulling a root vegetable out of the underground and causing a drawing and transportation unit to surely clamp and dig out the vegetable by a low power.SOLUTION: A digging upper body is constructed to include two right and left downward extended beams 20; and spatulas 21 attached to the inside lower end portions of the beams 20. The spatulas 21 are disposed transversely symmetrically in a front view in a V-shape, and are inclined upward from the front to the back. The rear ends of the spatulas 21 are positioned below follower pulleys 31 of a drawing and transportation unit 3 disposed at an inclination to rise backward, and are located in front of the extension of a follower pulley rotation center axis 310, and at the back of a vertical line 311 passing through an intersection between the follower pulley rotation center axis 310 and the center line of a conveyor belt 30.

Description

  The present invention relates to a root vegetable harvester that harvests long root vegetables such as burdock cultivated in a line along a ridge.

  Conventionally, for long root vegetables such as burdock cultivated in a row along the ridge, a pair of sandwich belts that dig up the soil in the vicinity of this root vegetable to lift the root vegetables together with the soil and rotate by pulleys ( 2. Description of the Related Art Root vegetable harvesting machines that perform harvesting by sandwiching and transporting root vegetables lifted by a sandwiching section) have become widespread. For example, harvesters described in Japanese Patent No. 3235007 (Prior Art 1), Japanese Patent Laid-Open No. 2001-204216 (Prior Art 2), and Japanese Patent Laid-Open No. 2001-204216 (Prior Art 3) are known.

Japanese Patent No. 3235007 (Prior Art 1) JP 2001-204216 A (Prior Art 2) JP 2001-204216 A (Prior Art 3)

  When harvesting with a harvesting machine like the prior art, the root vegetable is lifted up with the soil by digging up the soil in the vicinity of the root vegetable, and the upper part of the root vegetable is pinched by a pulling and conveying section consisting of a clamping belt that rotates endlessly. However, if there is a problem in lifting the root vegetables together with the soil, if the trouble occurs in the pulling conveyance unit and the pinching belt cannot be pinched, or when the root vegetables are lifted If it slips, it may not be pinched and may drop and remain in the soil. Therefore, there has been a demand for a root crop harvesting machine with good harvesting performance that allows root vegetables to be lifted from the soil with high precision and securely pinched and pulled out by a conveying section with low power. For this reason, the present invention has been made to solve such problems.

  In order to solve the above-mentioned problem, the root vegetable harvesting machine according to claim 1, the digging body that advances in the vicinity of the root vegetables cultivated in a row to float the root vegetables, and more than the digging body A root vegetable harvester that is located on the rear side in the advancing direction and has a pulling and conveying unit that pulls and conveys the root vegetables while sandwiching the upper part of the root vegetables that is lifted by the digging body. And a spatula mounted on the inner lower end of the beam and a spatula for lifting the root vegetables together with the soil. The spatula is symmetric with respect to the root vegetables In addition, it is inclined in the shape of an upside-down shape from the front to the rear, and a drilling blade is located at the front end of each left and right spatula. Inclined The driven pulley rotation center axis is positioned at the lower portion of the driven pulley that winds and holds the front end of the conveyance belt of the drawn and conveyed portion, and is forward of the extension line of the driven pulley rotation center axis. It is a root crop harvester characterized by being located behind the vertical line passing through the intersection of the belt and the conveyor belt center line.

  In the root crop harvesting machine according to claim 2, the excavating blade is located at the front end of each of the left and right spats, and a parallel portion having a certain width is provided in front of the spatula continuously from the excavating blade when viewed from the front. The root vegetable harvesting machine according to claim 1, wherein a projecting portion that gradually increases inward is provided, and the shape gradually narrows from the projecting top portion toward the rear end portion.

  According to the first aspect of the present invention, the spatula rear end is located at the lower portion of the driven pulley that winds and holds the front end portion of the conveyance belt of the pulling conveyance portion that is provided so as to incline so that the front is low and the rear is high. It is located in front of the extended line of the driven pulley rotation center axis and behind the vertical line passing through the intersection of the driven pulley rotation center axis and the conveyor belt center line, thereby holding the digging root vegetables The soil that has been lifted is discharged smoothly after the root vegetables are pinched by the conveyor belt, and the extraction is reliably and efficiently performed.

  According to the invention which concerns on Claim 2, while maintaining the stable piercing in the soil by the parallel part of the fixed width | variety continuous with the excavation blade of a front-end part, a root vegetable is provided in the left-right symmetrical shape in the shape of a reverse eight. Guide to the center of the spatula. Furthermore, the spatula is provided with a projecting part that gradually widens inward as it leans upward from the parallel part to the rear, so that the spatula around the root vegetables cut vertically by the left and right beams at the front part of the spatula The soil can be pushed up efficiently and efficiently by pushing upward force gradually with the root vegetables. Furthermore, the shape that gradually narrows from the projecting top to the rear end allows the soil that has been lifted upward to escape downward, and the upper part of the root vegetable is placed so that the conveyor belt of the pulling and conveying unit can easily pinch the root vegetable. In addition to exposing from the soil portion, accumulation of soil on the front end portion of the conveyor belt can be minimized to reduce the biting of soil into the conveyor belt and to reduce the sandwiching loss, thereby improving the pinching accuracy of root vegetables.

It is a left view at the time of operation | work of the root vegetable harvesting machine of this invention. It is the left view which carried out partial cross section of the root vegetable harvesting machine of this invention. It is the top view which abbreviate | omitted the extraction conveyance part of the root vegetable harvesting machine of this invention. It is a principal part front view of Horikami body. It is a side view of Horikami body. It is a side view of a spatula.

  One embodiment will be described with reference to FIGS. This embodiment is an example when the root vegetable is burdock.

  FIG. 1 is a left side view of a harvesting state of a root vegetable harvester showing an example of the present invention. FIG. 2 is a left sectional view of the root vegetable harvesting machine of the present invention, with a partial cross section. The root vegetable harvesting machine of the present invention is for harvesting root vegetables (burdock) A cultivated in a row on a cultivation basket formed in a field. The root vegetable harvesting machine is connected to a three-point link mechanism provided on the rear side of a tractor (not shown) for work. The root vegetable harvesting machine includes a beam 20 and a spatula 21 as the excavated body 2, a pulling and conveying unit 3, and a stocker 4. When the tractor travels along the cultivation basket, the spatula 21 raises the root vegetables (burdock) A and the surrounding soil toward the ground surface GL. The pulling and conveying unit 3 is arranged behind and above the spatula 21, sandwiches the upper part of the root vegetable (burdock) A lifted by the spatula 21, and pulls the root vegetable (burdock) A from the cultivation basket to the rear side of the root vegetable harvester. Transport. The stocker 4 is disposed behind and below the pulling and conveying unit 3 and stores the root vegetables (burdock) A conveyed by the pulling and conveying unit 3. When the weight of the root vegetables (burdock) A stored in the stocker 4 exceeds a predetermined value, the bottom of the stocker 4 opens, and the stored root vegetables (burdock) A falls to the ground surface GL in a collective state.

  At the front part of the root crop harvester, there are provided a top link pin 11 provided at the front end of the top mast 10 for connection to the three-point link mechanism behind the tractor and lower link pins 12 provided at the lower left and right thereof, When attached to the tractor, the fixed frame 1 is fixed to the tractor.

  FIG. 3 is a plan view showing a partial cross section of the root vegetable harvesting machine according to the present invention with the drawing and conveying section omitted. FIG. 4 is a front view of the main part of the moat upper body of the root vegetable harvesting machine. 3 and 4, only a part of the configuration of the root vegetable harvester is shown, and the other parts are omitted.

  The fixed frame 1 includes a horizontal pipe 18 extending in the vehicle width direction. A support pipe 131 of the slide frame 13 is slidably attached to the outer periphery of the horizontal pipe 18. The support pipe 131 forms a part of the slide frame 13. A swing arm 151 is rotatably provided at the rear end portion of the slide frame 13 via a horizontal shaft 150 orthogonal to the traveling direction. The slide frame 13 is moved in the vehicle width direction by a cylinder 130 fixed to the fixed frame 1. As the support pipe 131 slides, the slide frame 13 and the swing arm 151 slide together in the vehicle width direction.

  Two beams 20 are attached to the swing arm 151 symmetrically in the left-right direction when viewed from the front. The beam 20 has a long length extending in the vertical direction. Each of the beams 20 is inclined so that the lower part thereof is positioned forward and inward in the vehicle width direction with respect to the upper part, and is fixed to the swing arm 151. By sliding the slide frame 13 and the swing arm 151 together in the vehicle width direction, the beam 20 can move in the left-right vehicle width direction with respect to the fixed frame 1, so that the beam 20 can be moved without moving the tractor left and right. It can be easily adjusted to the root of the root vegetable (burdock) A.

  The spatula 21 is attached to the lower end of the beam 20. The spatula 21 is inclined to rise as it goes rearward, extends in the front-rear direction in a plan view, and has an inverted octagonal shape in a front view. A digging blade 212 is formed at the front end of the spatula 21, and a parallel portion 213 having a constant width is provided in front of the spatula 21 continuously from the digging blade 212. A projecting portion 214 that gradually widens is provided, and the shape gradually narrows from the projecting top portion toward the rear end portion 215. As shown in FIG. 4, the root vegetables (burdock) A at the time of digging work is located in the middle of the left and right spatulas 21 in a front view, and the gap between the left and right protruding parts 214 is provided with an interval through which the root vegetables (burdock) A can pass. It is.

  At the time of digging work, the soil is stabbed into the soil by the excavation blade 212 in front of the spatula 21, and then the soil is gradually lifted by the parallel portion 213, and further, the soil after being cut left and right by the beam 20 is projected to the projection portion 214 The upward lifting force is increased by the above and lifted together with the root vegetable (burdock) A. When the upper part of the root vegetable (burdock) A is clamped by the conveying belt 30 of the pulling and conveying unit 3, the surrounding soil is removed from the protruding top. It is dropped little by little below the rear part that gradually narrows toward the rear end part 215.

  The spatula 21 rear end 215 is disposed following and above the spatula 21 and is wound around and held at the front end of the conveyor belt 30 of the pulling and conveying unit 3 that is provided so as to incline upward with a low front and a high rear. Located below the pulley 31 and in front of the extended line of the driven pulley 31 rotation center axis 310 and behind the vertical line 311 passing through the intersection of the driven pulley 31 rotation center axis 310 and the conveyor belt 30 center line. It consists of positional relationships. When the root vegetable (burdock) A is sandwiched between the conveying belts 30 in front of the vertical line 311, the lower portion of the root vegetable (burdock) A has a relatively hard portion where the lifted soil is not yet broken. Therefore, if it tries to pull out, it has a high pulling resistance, and the probability of falling off from the sandwiched conveyor belt 30 increases. In addition, when the spatula 21 rear end 215 is located behind the rotation center axis 310, the soil in the lower part does not flow down smoothly after the root vegetables (burdock) A is sandwiched between the conveyor belts 30, and the soil is not collapsed and hard. Is formed, and the force that pushes and pulls the root vegetable (burdock) A in the vertical direction is likely to act, and the root vegetable (burdock) A is pulled out from the conveyor belt 30, or the holding posture changes, causing inconvenience in the subsequent process. Inconveniences such as dropping during transportation occur. The structure of the positional relationship of the spatula 21 rear end 215 stabilizes the holding posture of the root vegetables (burdock) A, and the lifted soil is smoothly drained, and the extraction is reliably and efficiently performed.

  As shown in FIGS. 5 and 6, a front fixing hole 211 for fixing the front side of the spatula 20 is provided in the lower end portion of the beam 20 in a direction orthogonal to the traveling direction, and provided on the front side of the spatula 20. A fixing bolt is inserted into the fixing hole and is held rotatably. In addition, a plate-like arm is fixed and extended rearward from the lower end portion of the beam 20, and a fixing hole for holding the spatula 21 is provided in the rear portion, and a bolt is inserted and fixed. In the case of this example, the fixing hole is provided with two beam-side fixing holes 200 on the beam 20 side and three fixing holes 210 on the spatula 21 side, and the front fixing hole 211 part is pivoted up and down. Then, the mounting angle of the spatula 21 with respect to the beam 20 can be changed by selecting and fixing the holes to be superposed. FIG. 5A shows a state where the attachment angle is maximized, and FIG. 5B shows a state where the attachment angle is minimized. Optimum digging work can be performed by adjusting to work conditions and soil quality.

  In this example, the attachment angle of the spatula 21 can be changed to 25 degrees, 27.5 degrees, and 30 degrees in side view, and is substantially the same as or smaller than the inclination angle of the conveying belt 30 of the drawing conveying section 3. Is provided.

  Above the slide frame 13, a power transmission mechanism that transmits and branches power, such as the input shaft 16, the swing rod 152, and the universal joint 17, is disposed. A part of the power transmission mechanism constitutes a swing drive unit 15 that swings the beam 20, and the swing rod 152 has a crank portion 154 and an upper portion provided by decentering the rotation shaft of the input shaft 16. They are connected and move up and down in response to the rotational force of the input shaft 16. The lower end portion of the swing rod 152 is rotatably connected to the front end portion of the swing arm 151 by a swing shaft 153. When the swing rod 152 moves up and down, the rear horizontal shaft 150 is supported as a fulcrum. The swing arm 151 swings up and down. Since the beam 20 having a long length extending in the vertical direction is fixed to the rear side of the horizontal axis 150 of the swing arm 151, the beam 20 swings back and forth around the horizontal shaft 150 in a side view.

  The input shaft 16 protrudes to the front side of the root vegetable harvester. The input shaft 16 is attached to a PTO shaft (not shown) provided in the tractor via a universal joint (not shown). Power is transmitted from the tractor to the input shaft 16. A part of this power causes the swing arm 151 to rotate up and down about the horizontal shaft 150 via the swing rod 152.

  In addition, a universal joint 17 is connected to the rear end of the input shaft 16, and a part of the power input to the input shaft 16 is transmitted to the extraction conveyance unit 3 to drive the extraction conveyance unit 3. The universal joint 17 can be expanded and contracted to a desired length.

  In front of the beam 20, which is a lower part of the input shaft 16, a bowl-shaped earth removing disk 14 is disposed. The soil removal disk 14 is attached to the slide frame 13 and is symmetrically provided across the root vegetable planting line with the concave surface facing diagonally forward in a plan view, and the left and right soils of the root vegetable before and after digging the planting basket are left and right. To eliminate.

  A rear portion of the slide frame 13 extends upward, and a holding frame 33 extends therefrom. The holding frame 33 holds the drawing conveyance unit 3 and slides in the vehicle width direction together with the slide frame 13. The pulling and conveying unit 3 includes a pair of conveying belts 30 that face each other in the vehicle width direction. The conveyor belt 30 is endless, is stretched over a driven pulley 31 positioned in the front and a driving pulley 32 positioned in the rear, and extends so as to gradually rise rearward in a side view. The conveyor belt 30 is stretched by a plurality of support pulleys 35 positioned between the driven pulley 31 and the drive pulley 32. The driven pulley 31, the drive pulley 32, and the support pulley 35 are held by the transport unit frame 34. The root vegetables (burdock) A is sandwiched and conveyed between a pair of opposed conveyor belts 30.

  The drive pulley 32 is connected to a power distribution unit 36 located above and behind the pulling and conveying unit 3 to which the power from the universal joint 17 is transmitted and the power is distributed, and is input from the input shaft 16 via the universal joint 17. And the driven pulley 31 wound around the conveyor belt 30 is also rotated.

  The transport unit frame also holds a stocker 4. The stocker 4 has a bowl-like shape. When the upper part of the root vegetable (burdock) A is discharged at the end of the pulling and conveying unit 3, the root vegetable (burdock) A is discharged. Is stored in the stocker 4. When a certain amount of the stored root vegetables (burdock) A is stored, the lower part rotates downward due to the weight of the root vegetables (burdock) A. As a result, the stored burdock A is collectively released from the stocker 4 by a certain amount.

  Here, in the present embodiment, as shown in FIG. 3, in the present embodiment, the conveyance belt 30 has a rear end biased by a predetermined distance (for example, one cultivation basket) in the vehicle width direction with respect to the front end in plan view. It extends diagonally with respect to the traveling direction of the root vegetable harvesting machine. The stocker 4 is directed obliquely with respect to the traveling direction of the root vegetable harvesting machine so as to extend in the length direction of the conveyor belt 30 in plan view. As a result, the discharged root vegetables (burdock) A falls to a place separated from the pre-harvest culm and does not interfere with the next digging of the culm.

  FIG. 4 is a front view showing the positional relationship between the beam 20 traveling in the cultivation basket, the spatula 21 and the transport belt 30. The soil around the root vegetable (burdock) A is lifted together with the root vegetable (burdock) A by the beam 20 and the spatula 21 located on the left and right of the root vegetable (burdock) A, and transported by the extraction transport unit 3 positioned at the center of the left and right beam 20 Root vegetables (burdock) A is pinched and pulled out from the belt 30 starting end. The beam 20 is provided so as to incline outward from the left and right sides of the spatula 21 from the attachment portion. Thereby, as the soil cut and lifted in the traveling direction by the beam 20 is lifted, the lateral pressure of the beam 20 decreases, the lifting resistance decreases, and the soil is easily lifted.

  When harvesting the root vegetable (burdock) A cultivated in the cultivation basket using such a root vegetable harvesting machine, the spatula 21 part provided in the root vegetable harvesting machine is located near the lower part of the root vegetable (burdock) A by operating the tractor. Position.

  Subsequently, when the tractor travels, the root vegetable harvester is pulled by the tractor and moves forward, and the spatula 21 travels in the ground below the root vegetable (burdock) A to lift the root vegetable (burdock) A together with the surrounding soil. . The upper part of the raised root vegetables (burdock) A is sandwiched between the conveyor belts 30. The rear end portion of the spatula 21 is in front of the extension line of the rotation center axis 310 of the driven pulley 31 that winds and holds the front end portion of the conveyance belt 30 of the drawing / conveyance unit 3, and the rotation center axis 310 of the driven pulley 31 and the conveyance belt 30. The structure is located behind the vertical line 311 that passes through the intersection with the center line, and when the pinion begins to be sandwiched, the rear end of the spatula 21 is located on the left and right, and the posture of the burdock A is maintained. After that, when root vegetables (burdock) A is securely sandwiched, the lower part is released from the rear end of the spatula 21 and the soil lifted together with the root vegetables (burdock) A falls into the space part of the lower part of the spatula 21 and the root vegetables. Only (burdock) A is transported backward by the transport belt 30 and put into the stocker 4.

  The root vegetables (burdock) A are pulled out one after another and stored in the stocker 4 as described above. When a certain amount of root vegetables (burdock) A is stored in the stocker 4, the root vegetables (burdock) A are collected and discharged together. An operator who follows the tractor picks up a root vegetable (burdock) A on the ground surface GL and loads it on a collection vehicle (not shown).

DESCRIPTION OF SYMBOLS 1 Fixed frame 10 Top mast 11 Top relink pin 12 Lower link pin 13 Slide frame 130 Cylinder 131 Support pipe 14 Earth removal disk 15 Oscillation drive part 150 Horizontal axis 151 Oscillation arm 152 Oscillation rod 153 Oscillation axis 154 Crank part 16 Input shaft 17 Universal joint 18 Horizontal pipe 2 Horigami body 20 Beam 200 Beam side fixing hole 21 Spatula 210 Fixing hole 211 Front fixing hole 212 Excavation blade 213 Parallel part 214 Projecting part 215 Rear end part 3 Pulling and conveying part 30 Conveying belt 31 Driven pulley 310 Rotation center axis 311 Vertical line 32 Drive pulley 33 Holding frame 34 Transport section frame 35 Support pulley 36 Power distribution section 4 Stocker A Root vegetables (burdock)

Claims (2)

A digging body that moves in the vicinity of the root vegetables cultivated in a row to lift the root vegetables, and a root vegetable that is located above the digging body and is located behind the digging body in the advancing direction. In a root crop harvesting machine having a pulling and transporting section for pulling and transporting the root vegetables while sandwiching the upper part,
The moat upper body is composed of two beams extending left and right from the root crop harvester main body frame, and a spatula attached to the lower inner end of the beam to lift the root vegetables upward together with the soil. It is provided in the shape of an inverted octagon symmetrically about the root crop from the frontal view, and is tilted upward from the front to the rear. Excavation blades are located at the front ends of the left and right spats, and the rear end of the spatula. Is located at the lower part of the driven pulley that winds and holds the front end of the conveying belt of the pulling and conveying part provided with a slanted front and lower rear, and is an extension of the driven pulley rotation center axis. A root crop harvester characterized by being located in front of a line and behind a vertical line passing through the intersection of the driven pulley rotation center axis and the conveyor belt center line.   Excavation blades are located at the front end of each of the left and right spats, and a parallel part of a certain width is provided in front of the spatula continuously from the frontal excavation blade, and the projecting part gradually increases inward as it goes backward from the parallel part. The root vegetable harvesting machine according to claim 1, wherein the root vegetable harvesting machine has a shape that gradually narrows from the projecting top to the rear end.