JP2014156188A - Farm field travel work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an auxiliary wheel effectively function in relation to a crawler besides the machine body tilt prevention function, in a farm field travel work vehicle for respectively providing the auxiliary wheel on the left-right outsides of the crawler, by using the crawler of only one row in a substantially central position of the work vehicle as a travel device.SOLUTION: A crawler 12 of only one row is used as a travel device of a work vehicle, and left-right auxiliary wheels 61 and 61 are provided on the left-right outsides of the crawler 12, and while, the respective auxiliary wheels 61, a grounding wheel 62 contacting with the ground surface in an axial directional outside position and a band body sliding contact wheel 63 slidingly contacting with an upper surface 13a of an under surface travel part of an elastic band body 13 of the crawler in an axial directional inside position, are installed on a common shaft 64 in a corotation state of both wheels 62 and 63, and the respective auxiliary wheels 61 and 61 are made to effectively function by making the grounding wheel 62 corotate with the band body sliding contact wheel 63 when the band body sliding contact wheel 63 rotates by slidingly contacting with the upper surface 13a of the under surface travel part of the elastic band body 13.

Description

  The present invention relates to an agricultural field traveling work vehicle in which agricultural work can be performed while traveling in an agricultural field. In addition to the harvesting machine shown in the embodiment, the field traveling work vehicle that can be applied in the present application includes, for example, a herbicide spraying vehicle that sprays herbicides between the furrows, and irrigation that spreads fertilizer and water on the slope between the furrows. It can also be applied to cars.

  As an example of this type of field traveling work vehicle, the present applicant has already proposed the one disclosed in Japanese Patent Application Laid-Open No. 2010-148387 (Patent Document 1) (the name of the invention is a harvesting machine). In addition, the work vehicle (harvesting machine) of Patent Document 1 is suitable for harvesting soft vegetables such as spinach, komatsuna and leek.

  As shown in FIGS. 9 and 10, the harvesting machine disclosed in Patent Document 1 has a machine frame 2 that has a front part inclined downward and a rear part inclined upward on a traveling device 1. There is provided a transport device 4 for holding the crop P planted on the farm field and transporting the crop P from the front lower part to the rear upper part, and a storage container 7 provided immediately below the end part of the transport apparatus 4. ing.

  Further, the known harvesting machine shown in FIGS. 9 and 10 is provided with a cutter (or digging claw) 3A for cutting or digging the root part Pa of the crop P vegetated on the field in the front part of the body frame 2. . The conveying device 4 uses a clamping belt 42 made up of right and left belts. Note that the sandwiching belts 42 of the conveying device 4 are arranged in two rows on the left and right sides, so that crops of two vegetation parts (A1, A1 in FIG. 10) can be harvested at the same time.

  A crawler 12 is used for the traveling device 1. The crawler 12 is obtained by winding an endless belt-like elastic band 13 made of an elastic material (rubber) between a large-diameter driving wheel (sprocket) 14 and a small-diameter driven wheel (idler) 15.

  When harvesting the cultivated crop P in the field using the known harvesting machine shown in FIGS. 9 and 10, the left and right handle bars 18 are gripped by the grip portions 19 (a pair of left and right) to balance the left and right. While traveling, the traveling device 1 travels forward and harvests the crops P of the two vegetation parts A1 and A1 at the same time. First, the root part Pa of the crops P vegetated on the field in the front part of the body frame 2 is collected. The crop P is cut or dug up, held at the start end of the transport device 4 and then transported, and the crop P is dropped and stored in the storage container 7 sequentially from the end of the transport device 4.

  By the way, when the cultivated crop is leek P, as shown in FIG. 10, the streak B is often planted and cultivated on the field at intervals of 15 cm inside or outside, for example. The harvesting machine shown in FIGS. 9 and 10 harvests two adjacent vegetation parts (two rows A1 and A1) at the time of harvesting.

  As described above, in the case where a relatively narrow range (two vegetation portions A1 and A1) is harvested in the left and right directions, when two rows of crawlers 12 spaced apart from each other are employed, Since the interval between the two is wide, the unharvested crop (green onion) in the vegetation part A2 in the outer row of the harvesting range (two vegetation parts A1 and A1 shown in FIG. 10) is stepped on by the crawler. In a crop of a cropping mode (for example, a leek) that needs to be narrowed (about 2 strips), it is necessary to perform a harvesting operation with a harvester that uses only one row of crawlers 12 at the center position of the machine body as shown in FIG. In this case, the width of the crawler 12 is often about 10 to 12 cm.

  By the way, in the well-known harvester shown in FIG.9 and FIG.10 mentioned above, it has a considerable weight by the traveling apparatus 1, the body frame 2, the conveying apparatus 4, the batteries 10 and 10, and the like. In this harvesting machine, the crawlers 12 of the traveling device 1 are only in one row at a substantially central position of the machine body width and the crawler width is narrow (10 to 12 cm width). In order to secure the left / right balance of the harvesting machine, it is necessary to strongly hold the grip portions (there is a pair of left and right) 19 of the left and right handle bars 18.

  Therefore, in the harvesting machine shown in FIGS. 9 and 10, it is necessary to hold the left and right grip portions 19 firmly and prevent tilting of the machine body in order to secure the left-right balance of the machine body (harvesting machine) during the harvesting operation. There is a problem that it is necessary to use extra nerves and power for the harvesting work, and it is difficult to perform the harvesting work, and if the harvester tilts greatly to the left and right, the overall weight is quite heavy, so the tilting posture should be A large amount of force is required to reestablish, and there has been a problem that a powerless worker (for example, a woman) makes it difficult to reestablish the harvesting machine.

  On the other hand, the present applicant, in a harvesting machine using a crawler with a narrow crawler width and only one crawler at the center of the width as described above, is provided with auxiliary wheels on the left and right outer sides of the crawler. JP, 2011-193748, A) has already proposed. And in the harvesting machine of this patent document 2, when the body tries to tilt left and right, the auxiliary wheel on the tilting side can be prevented from tilting further by grounding.

JP 2010-148387 A JP 2011-193748 A (FIGS. 1 and 9)

  By the way, in the case where auxiliary wheels are respectively provided on the left and right outer sides of the crawler as in Patent Document 2, further tilting can be prevented by grounding the auxiliary wheel when the machine body (harvesting machine) tilts. Although the wheel rotates due to ground friction after grounding, it is in a non-rotating state at the beginning of grounding. Therefore, there is a problem that resistance is applied at the beginning of grounding and the grounding resistance becomes uncomfortable.

  On the other hand, in this type of harvesting machine, when an endless belt-like elastic band 13 made of an elastic material (rubber) is used as the crawler 12, for example, there is a bump-like raised portion on the ground, and the elastic band 13 is Each time it rides on the raised portion, the elastic band 13 at the raised portion is elastically deformed (bends upward). And in the case where the elastic band 13 of the crawler 12 is repeatedly (frequently) elastically deformed in this way, damage force is added to the elastic band 13 by the elastic deformation (and subsequent restoration), There is also a problem that the durability of the elastic band 13 is impaired.

  Therefore, the invention of the present application works by providing auxiliary wheels on the left and right outer sides of the crawler even if the traveling device has a narrow width and uses only one row of crawlers near the center of the work vehicle. The purpose of the invention is to prevent the vehicle from tilting left and right by a predetermined angle or more and to make the auxiliary wheel function effectively in association with the crawler.

  The present invention has the following configuration as means for solving the above problems. Note that the present invention is directed to an agricultural field traveling work vehicle that can perform agricultural work while traveling on an agricultural field. As an agricultural field traveling work vehicle that can be applied in the present application, for example, an agricultural field is used. There is a harvesting machine that can automatically and automatically harvest crops that are vegetated on the field while running. The field traveling work vehicle of the present application may be simply expressed as a work vehicle or a harvester in the following description.

[Invention of Claim 1 of the Present Application]
The agricultural field traveling work vehicle according to the first aspect is configured such that the agricultural scene G can be traveled by the traveling device 1 provided in the lower part of the machine body frame 2 of the working vehicle, as illustrated in the accompanying drawings.

  In the agricultural field traveling work vehicle of claim 1, the crawler 12 that can circulate and drive the endless belt-like elastic band 13 is employed as the traveling device 1.

  By the way, in a farm field where crops are cultivated on a flat field, the crawler 12 is often adopted as the traveling device 1. However, when the crawler 12 is used for the traveling device 1, the width of the crop that can be harvested at once is a work vehicle ( When the width is considerably narrower than the width of the harvesting machine (for example, width M = about 30 cm in FIG. 2), the harvesting machine in which the crawlers are provided in two rows with a left and right interval cannot be used. That is, in a harvester using a crawler in a two-row state, the interval between the left and right crawlers is widened, so that an unharvested crop outside the harvest width (width M in FIG. 2) (vegetation part A2) is stepped on by the crawler. It becomes impossible to use.

  Due to such circumstances, in the present application, the crawlers 12 serving as the traveling devices 1 are installed in a single row in a state of being positioned at the approximate center of the left-right width of the work vehicle (harvesting machine). In this case, the crawler 12 has a width (for example, a width of about 10 to 12 cm) that is considerably narrower than a harvesting width per one time (width M = about 30 cm in FIG. 2). By the way, in the case where the crawlers 12 having a narrow width and only one row are used as described above, the left and right balance becomes unstable and the left and right are easily tilted to make the work vehicle (harvesting machine) self-supporting.

  Therefore, in the work vehicle of the present application, the left and right auxiliary wheels 61, 61 that can contact the ground are attached to the left and right sides of the crawler 12 in a state of projecting outward in the left and right directions. The lower surface is set to a height that is substantially the same as or slightly above the lower surface of the crawler 12. If the lower surfaces of the left and right auxiliary wheels 61, 61 are the same as the lower surface of the crawler 12, the lower surface of the crawler 12 may not be sufficiently grounded due to unevenness of the ground. The height is preferably slightly above the lower surface of the crawler 12 (for example, about 1 cm).

  As shown in FIG. 3, the outwardly protruding lengths of the left and right auxiliary wheels 61, 61 are such that the width W between the outer ends of the auxiliary wheels 61, 61 is a harvested portion per time (see FIG. 2). It protrudes considerably long in a range that does not reach (not step on) the crop in the unharvested row (vegetation part A2) outside the width M). For example, the width of W in FIG. 3 can be set to about 35 cm.

  In the work vehicle according to the first aspect, the auxiliary wheels 61 and 61 each have a grounding wheel 62 that contacts the ground at the axially outer position with respect to the common shaft 64 and the elastic band at the axially inner position. A belt sliding contact ring 63 that is in sliding contact with the upper surface 13 a of the lower surface traveling portion of the body 13 is attached in a state where both wheels 62, 63 are rotated, and the lower surface traveling portion of the elastic band 13 is attached to the belt sliding contact ring 63. By rotating in contact with the upper surface 13a, the grounding ring 62 is rotated with the belt sliding contact ring 63.

  The size of the grounding wheel 62 and the belt sliding contact ring 63 in each auxiliary wheel 61, 61 is such that the grounding wheel 62 has a slightly larger diameter than the belt sliding contact ring 63, and the circumferential surface length of the grounding wheel 62 is large. Is longer than the circumferential surface length of the belt-sliding contact ring 63. Accordingly, when the crawler 12 is driven, the peripheral surface speed of the grounding wheel 62 is slightly higher than the peripheral surface speed of the belt body sliding contact ring 63 (same as the traveling speed of the elastic belt body 13).

  The work vehicle (harvesting machine) according to claim 1 has the following functions.

  First, the working vehicle according to claim 1 is used for a relatively narrow harvesting width M per crop of a crop to be harvested, so that a relatively narrow crawler 12 is arranged in a row near the center of the harvesting machine. Just using. If the work vehicle is made to stand on its own by only one row of the crawlers 12 in this way, the left-right balance becomes unstable. In the work vehicle of claim 1, the auxiliary wheels 61, 61 is provided, when this harvester tilts to the left or right by a predetermined small angle (for example, a stable posture of about 3 to 4 degrees), the tilting auxiliary wheel 61 is grounded and beyond. Can be prevented from tilting.

  Further, since the belt body sliding contact wheels 63, 63 at the axially inner positions of the auxiliary wheels 61, 61 are in sliding contact with the lower surface running portion upper surface 13a of the elastic belt body 13 of the crawler 12, this work vehicle is During traveling, the elastic band member 13 of the crawler is circulated and driven (the lower surface traveling part of the elastic band member 13 moves backward), so that each of the elastic band members 13 is in sliding contact with the lower surface traveling part upper surface 13a. The belt sliding rings 63, 63 are continuously rotated in the traveling direction, and at this time, the grounding rings 62, 62 on the outer side in the axial direction of the auxiliary wheels 61, 61 are also provided with the belt sliding wheels 63, 63, respectively. Rotate (rotate in the direction of travel).

  When the work vehicle tilts to the left or right in the traveling state, the grounding wheel 62 of the tilting auxiliary wheel 61 comes into contact with the grounding wheel 62. At that time, the grounding wheel 62 has a circumferential speed faster than the traveling speed on the traveling direction side. , The grounding resistance of the auxiliary wheel 61 (the action of pushing the ground soil forward by the grounding wheel 62) does not occur at all.

  Further, since the belt body sliding contact rings 63, 63 of the left and right auxiliary wheels 61, 61 are in sliding contact with the lower surface running portion upper surface 13a of the elastic belt body 13 (pressed from above), for example, a bump shape on the ground surface. Even if the elastic band 13 rides on the raised part, the elastic band 13 is not elastically deformed (does not bend upward) in the vicinity where the band sliding contact ring 63 corresponds. Yes.

[Invention of claim 2 of the present application]
By the way, when harvesting cultivated crops with the work vehicle (harvesting machine) of the present application, the front end of the harvesting machine is moved forward with the lower surface of the harvesting machine approaching (or slightly touching) the field scene G. If there are irregularities, the front end of the harvester may rise from the field G when the crawler 12 rides on the irregularities. In this way, if the surface is lifted from the field scene G at the front end of the harvester during the harvesting operation, it may adversely affect the crop harvesting operation (for example, failure to excavate the root of the crop or above the root). Or cutting the stalk).

  Accordingly, the invention of claim 2 of the present application proceeds in a state where the farm vehicle traveling vehicle of claim 1 has entered the lower surface of the front end portion of the machine body frame 2 into the soil near the farm scene G when the vehicle is traveling. A lift prevention means 25 for preventing the front part of the work vehicle from being lifted is provided.

  The lifting prevention means 25 employed in the second aspect of the present invention proceeds with the work vehicle in a state of entering the soil near the farm scene G (for example, a depth of about 3 to 5 cm from the ground surface). The portion buried in the frame is a resistance when the front side of the body frame 2 is about to rise. For example, the lifting prevention means 25 hangs a thin plate-like support material (having a low resistance when traveling in the soil) from the lower surface of the front end portion of the body frame 2 in a vertical orientation, and has a predetermined small size at the lower end portion of the support material. A thin plate with an area attached in a substantially horizontal orientation, or a lower part of a thin plate suspended from the lower surface of the front end of the fuselage frame 2 (with a low resistance when traveling in the ground) is bent horizontally. Etc. can be adopted. The lift prevention means 25 may be installed at one place on the lower surface of the front end portion of the machine body frame 2 or at two places separated from each other on the left and right.

[Effect of the invention of claim 1 of the present application]
The field traveling work vehicle of the invention of claim 1 has the following effects.

  (1) Even if the crawler 12 having a narrow width and only one row is used as the traveling device 1, the auxiliary wheels 61 and 61 are attached to the left and right outer sides of the crawler 12 in a protruding state. Even if the left-right balance is lost and the work vehicle tries to tilt in either the left or right direction, further tilting of the work vehicle can be prevented by grounding the auxiliary wheel 61 on the tilt side.

  (2) As each auxiliary wheel 61, 61, both wheels 62, 63 orbit a grounding wheel 62 in contact with the ground and a belt sliding wheel 63 in sliding contact with the lower surface running portion upper surface 13a of the elastic belt 13 of the crawler 12. Since the elastic belt 13 of the crawler is circulated and driven while the work vehicle is traveling, the grounding wheels 62 and 62 of the left and right auxiliary wheels 61 and 61 are respectively employed. Is always rotating in the direction of travel. Therefore, when the grounding wheel 62 is grounded, the grounding resistance (the action of pushing the ground soil forward by the grounding wheel 62) does not occur at all (the handle is never taken to the grounding side), so the operation is continued without any sense of incongruity. it can.

  (3) Since the belt-sliding contact rings 63, 63 of the left and right auxiliary wheels 61, 61 are in sliding contact (pressed from above) with the lower surface running portion upper surface 13a of the elastic belt 13 of the crawler, for example, the ground Even if there is a bump-like ridge, the elastic band 13 does not elastically deform even if the elastic band 13 rides on the ridge. Therefore, the durability with respect to the elastic band 13 is improved.

[Effect of the invention of claim 2 of the present application]
In the agricultural field traveling work vehicle according to the second aspect, since the lifting prevention means 25 is provided on the lower surface of the front end portion of the body frame 2, the lifting prevention means 25 travels in the soil of the farm scene when traveling on the work vehicle. It becomes the resistance to lift the front part of the work vehicle.

  Therefore, in the agricultural field traveling work vehicle according to the second aspect, in addition to the effects of the first aspect, when the work vehicle is traveling, the work vehicle can be always traveled in a stable posture by the lifting prevention means 25 (work vehicle). There is an effect that the front part does not rise carelessly.

It is a side view of the agricultural field traveling work vehicle (harvesting machine) of the present embodiment. It is a top view of the conveying apparatus and storage container part in the working vehicle (harvesting machine) of FIG. FIG. 2 is a right side view of FIG. 1 (viewed from the rear). It is IV-IV expanded sectional drawing of FIG. FIG. 2 is an enlarged view of a front portion (a portion where a lifting prevention means is installed) of the work vehicle of FIG. 1. It is VI-VI arrow line view of FIG. FIG. 6 is a view corresponding to FIG. 5 showing a modification of the floating prevention means. FIG. 8 is an enlarged view taken along the line VIII-VIII in FIG. 7. It is a side view of the harvester of a well-known example. It is XX expanded sectional drawing of FIG.

  Referring to FIGS. 1 to 8, the field traveling work vehicle of the embodiment of the present application will be described. In this embodiment, a harvester that harvests crops is adopted as the field traveling work vehicle. A farm vehicle working vehicle is sometimes expressed as a harvester. In the working vehicle (harvesting machine) of this embodiment, a leek is adopted as the crop P to be harvested. In the following description, the crop is sometimes called a leek. 1 to 6 show a first embodiment, and FIGS. 7 to 8 show a modification (second embodiment) of the lifting prevention means in the first embodiment.

[First Embodiment of FIGS. 1 to 6]
The harvesting machine of the embodiment shown in FIG. 1 to FIG. 6 has an excavation device 3 for attaching an airframe frame 2 on a traveling device 1 and excavating a root Pa of leeks P vegetated on a field in the front part of the airframe frame 2. And a series of transfer devices 4 are provided on the machine body frame 2, and a storage container 7 is provided immediately below the end portion of the transfer device 4 (the end portion of the rear transfer portion 4B).

  In the harvesting machine of this embodiment, a battery 10 is employed as a power source for the traveling device 1 and various drive units (digging device 3, transport device 4 and the like). One battery 10 (two in total) is installed on each of the left and right outer sides of the traveling device 1.

  The traveling device 1 uses a crawler 12. This crawler 12 is installed in only one row at the center of the harvester for the reason described later (see FIG. 3). The crawler 12 is formed by winding an endless belt-like elastic band 13 made of an elastic material (rubber) between a large rear driving wheel (sprocket) 14 and a small front driven wheel (idler) 15 on the front side. is there. The crawler 12 is supported by the traveling unit frame 11 and is driven by a traveling motor 16 (powered from the battery 10).

  The body frame 2 is supported by the traveling unit frame 11 on the traveling device 1 side with a posture in which the front portion is inclined downward and the rear portion is inclined upward.

  The digging device 3 digs up a slightly deep portion (about the depth of the root portion Pa of the leeks P) from the field scene G on the lower surface of the front portion of the machine frame 2 to dig out the root portions Pa of the leeks P (makes it easy to pull out). is there. The digging device 3 vegetates on the farm field by causing the digging claw 31 to swing back and forth by the harvesting motor 22 (described later) via the operating rod 32 while the harvester is advanced by the traveling device 1. The root part Pa of the leek P can be excavated sequentially (the soil is loosened to such an extent that the leek P can be easily pulled out).

  By the way, if the cultivated crop is harvested by cutting roots such as spinach or komatsuna, the root cutting device (cutter) is used instead of the digging device 3 (digging claw 31). The cutter of the root cutting device proceeds a little deeper from the farm scene G and cuts the root portion of the root leaving the stem.

  The transport device 4 includes a front transport unit 4A and a subsequent transport unit 4B. The front transport unit 4A and the rear transport unit 4B are installed on the body frame 2 in an inclined posture in which the front part is low and the rear part is high. In addition, the end part of the front transport unit 4A and the start end part of the rear transport unit 4B are superposed vertically at approximately the middle position of the front and rear length of the harvesting machine, and the green onion P transported by the front transport unit 4A is It can be transferred from the end portion of the front conveying portion 4A to the starting end portion of the rear conveying portion 4B.

  As shown in FIG. 2, the front conveying unit 4A employs two sets of sandwiching belts 42 each composed of two belt belts arranged side by side.

  On the other hand, as shown in FIGS. 2 and 3, the rear conveying unit 4 </ b> B employs two sets of sandwiching belts 52 formed of two belt belts arranged side by side.

  The post-conveying unit 4B also serves as a posture tilting device 5 for backwardly tilting the posture of the leeks (P1 to P3 in FIG. 1) conveyed in a vertical posture (posture P4) as will be described later. ing. In other words, in this embodiment, the posture tilting device 5 includes an upper clamping belt 52 serving as the rear conveying unit 4B and a lower clamping belt 53 arranged in parallel therebelow. As shown in FIG. 1, the upper clamping belt 52 clamps the upper half of the green onion P3, while the lower clamping belt 53 clamps the lower half of the green onion P3, and the conveyance speed of the lower clamping belt 53 is increased. It is set slightly slower than the conveying speed of the upper clamping belt 52. Accordingly, when the leek transferred to the rear conveying unit 4B moves to the position indicated by reference numeral P3 in FIG. 1, the leek is tilted backward from the vertical posture indicated by P3 due to the speed difference between the upper and lower clamping belts 52 and 53. The posture changes.

  The digging device 3, the front transport unit 4A, and the rear transport unit 4B are driven by a common harvesting motor 22. That is, when the harvesting motor 22 is actuated, the actuating bar 32 of the digging device 3 is pushed and pulled through the respective power transmission members (pulleys, belts, etc.) (the digging claw 31 swings back and forth). The pulleys of the clamping belts 42, 52, and 53 are respectively rotated (the belt belt of the clamping portion travels from the lower front part toward the rear upper part). The speed difference between the upper clamping belt 52 and the lower clamping belt 53 can be generated by a power transmission member of the same drive system by changing the diameter of the pulley that drives each belt.

  As shown in FIG. 1 and FIG. 2, dividers 23, 23,... For scraping the leeks P vegetated in the field and guiding them to the start ends of the sandwiching belts 42, 42, Is provided. The dividers 23 and 23 are configured as a set of two with a predetermined interval, and are attached so as to protrude forward from the start ends of the sandwiching belts 42 and 42 on the left and right sides. The dividers 23 and 23 can scrape the leeks P in the field and sandwich them in the start ends of the clamping belts 42 and 42, respectively.

  As shown in FIGS. 1, 5, and 6, a slidable stand 24 that touches and slides on the field G is attached to the lower part of each divider 23, 23... As shown in enlarged views in FIGS. 5 and 6, the slide base 24 has a U-shaped cross section with a narrow width (for example, a width of 15 to 20 mm) on the left and right (for example, a U-shape with an upper opening) and a predetermined length (for example, 80 ˜100 mm in length), and prevents the front part of the body frame 2 from sinking under the field scene when the harvesting machine travels forward.

  The left and right handle bars 18 are fixed to the traveling unit frame 11. The front end side of each handle bar 18, 18 extends to the upper rear of the harvester, and various operation units are provided in the vicinity of the grip parts 19, 19 at the front end of the handle bar.

  The storage container 7 is installed at a position directly below the end portion of the rear transport unit 4B, and can sequentially drop and store the onions P4 discharged from the end portion of the rear transport unit 4B.

  As shown in FIGS. 1 to 3, the storage container 7 includes a bottom plate 71, a front plate 72, and left and right side plates 73, 73, and the upper surface side and the rear surface side are opened. .

  The storage container 7 is installed in a state of being guided by a guide device 8 so as to be movable up and down, while being supported in a state of being biased upward by an upward biasing means 9. Will be described.

  As shown in FIGS. 1 and 3, the guide device 8 guides the left and right side plates 73, 73 of the storage container 7. The guide device 8 has two guide grooves (an upper guide groove 81 and a lower guide groove) on the guide plate 80. A guide groove 82) is formed. As shown in FIG. 1, the upper guide groove 81 and the lower guide groove 82 formed in the guide plate 80 are formed in the same straight line and the posture in which the lower side is inclined backward by about 60 °.

  On the other hand, on the outer surface of each of the left and right side plates 73, 73 of the storage container 7, two upper and lower rollers 74 (four in total on the left and right) are fitted into the upper guide groove 81 and the lower guide groove 82 of the guide device 8, respectively. 75 is attached.

  Then, two upper and lower rollers 74 and 75 (a pair of left and right) on the left and right side plates 73 and 73 on the storage container 7 side are respectively provided in an upper guide groove 81 and a lower guide groove 82 of the guide device 8 (a pair of left and right). By fitting, the storage container 7 can be moved in the length direction (vertical direction) of the upper and lower guide grooves 81 and 82.

  The storage container 7 is supported in a state of being urged upward by the upper urging means 9. In this embodiment, a coil spring is used as the upper urging means 9. The pair of upper biasing means (coil springs) 9 are used in a pair of left and right, and are interposed between the left and right guide plates 80 and 80 and the side plates 73 and 73 of the storage container 7, respectively.

  The upper biasing means (coil springs) 9 and 9 allow the storage container 7 to move downward by a height proportional to the weight of the leek group when the leeks P5 are deposited in the storage container 7. The upward biasing force is set. In other words, the upper biasing means 9 and 9 have a downward movement amount that maintains the upper surface height of the leek group in the storage container 7 constant in proportion to the weight of the leek group stored in the storage container 7. The storage container 7 is supported by a strong urging force.

  In this way, when the storage container 7 is moved downward in proportion to the weight of the leek group stored in the storage container 7, the top surface height of the leek group in the storage container 7 can be maintained substantially constant. Therefore, the falling distance of the leeks P4 discharged from the end portion of the rear transport unit 4B into the storage container 7 is always constant, and the position of the root portion is shifted back and forth with respect to the group of leeks on which the falling leeks are deposited, The direction (parallelism) of each leek is hardly disturbed.

  A guide unit that can cause the guide device 8 to change the posture of the storage container 7 so that the forward downward inclination angle of the bottom plate 71 is loosened to the horizontal side when the storage container 7 is lowered to the lowest end position of the guide device 8. 83 is provided. The guide portion 83 has a bent guide groove that is continuous from the lower end portion of the lower guide groove 82 toward the front. When the storage container 7 is in the lowest movement state (the upper roller 74 is located at the lower end portion of the upper guide groove 81) and the storage container 7 is rotated forward, the lower roller 75 is bent and guided. By moving forward along the groove 83 to the position indicated by reference numeral 75 ', the storage container can be changed so that the inclination angle of the bottom plate is loosened to the horizontal side as indicated by reference numeral 7' (FIG. 1). It is like that. When the storage container is in the state shown by the chain line in FIG. 1 (reference numeral 7 '), the inclination angle of the bottom plate is about 25 °, and the onion in the storage container 7' does not fall off unintentionally. It becomes easy to take out the leek group from 7 '.

  By the way, in the harvesting machine of this embodiment, the crawler 12 is used in only one row as the traveling device 1 for the following reason.

  That is, as in this embodiment, when the cultivated crop is leek P, as shown in FIGS. 2 and 3, the streak B is planted in the field at a distance of, for example, 15 cm inside and outside to grow the seeds. . In the harvesting machine of this embodiment, two adjacent vegetation parts (for example, two rows of reference numerals A1 and A1) are harvested at a time. At that time, if two rows of crawlers 12 spaced apart from each other are adopted as the crawler 12, the spacing between the left and right crawlers is wide, so the harvest range (two vegetation portions A1, A1 shown in FIGS. 2 and 3). In the crop (green onion) of the cropping mode in which an unharvested crop (green onion) in the vegetation part A2 in the outer row of the plant is stepped on with a crawler and the harvest width needs to be narrowed (reference symbol M in FIG. 2), As shown in FIGS. 2 to 4, it is necessary to perform the harvesting operation with a harvester using only one row of crawlers 12 near the center of the harvester.

  Due to such circumstances, in this embodiment, the crawlers 12 serving as the traveling devices 1 are installed in a single row in a state where the crawlers 12 are positioned in the vicinity of the approximate center of the left-right width of the harvester. In this case, the crawler 12 has a width (e.g., a width of about 10 to 12 cm) that is considerably narrower than a harvesting width per one time (width M in FIG. 2 = about 30 cm, for example).

  By the way, in the case of using the crawlers 12 having a narrow width and only one row as described above, the left-right balance becomes unstable in order to make the harvesting machine independent.

  Therefore, in the harvesting machine of this embodiment, left and right auxiliary wheels 61 and 61 are attached to the left and right sides of the crawler 12 in order to prevent the harvesting machine from tilting greatly to the left and right.

  As shown in an enlarged view in FIG. 4, the auxiliary wheels 61 and 61 on each side of the crawler 12 are in contact with the ground wheel 62 that contacts the ground at an axially outer position with respect to the common shaft 64 and the crawler 12 at an axially inner position. A belt body sliding contact ring 63 that is in sliding contact with the lower surface running portion upper surface 13a of the elastic belt body 13 is attached in a state in which both wheels 62 and 63 are rotated.

  Each auxiliary wheel 61, 61 supports both ends of a common shaft 64 by a gate-shaped support base 65, respectively. The support base 65 is fixed to the non-moving part (traveling part frame 11) by the shaft 67 via the mounting arm 66, and fixed to the non-moving part (the lower surface of the battery mounting table) by the fixing bolt 68. Each auxiliary wheel 61, 61 is supported on the non-moving part (traveling part frame 11 side) at two positions.

  In addition, each auxiliary wheel 61, 61 is in contact with the upper surface 13a of the lower surface running portion of the elastic band 13 with the band sliding wheels 63, 63. 13 is driven to circulate, so that each of the grounding wheels 62, 62 is continuously rotated in the direction of travel (left rotation direction in FIG. 1). Attached with the contact rings 63, 63.

  As shown in FIG. 3, the outwardly protruding lengths of the left and right auxiliary wheels 61, 61 are such that the width W between the outer ends of the auxiliary wheels 61, 61 is a harvested portion per time (see FIG. 2). It protrudes considerably long in a range that does not reach (not step on) the crop in the unharvested row (vegetation part A2) outside the width M). For example, the width of W in FIG. 3 is about 35 cm, for example. Therefore, the unharvested crop (vegetation part A2 portion) is not pushed down by the auxiliary wheels 61, 61 during the harvesting operation. In addition, the unharvested crop (vegetation part A2 part) located immediately outside the vegetation parts A1 and A1 of the harvesting part is located directly below the batteries 10 and 10 of the advancing harvesting machine. Since the bottom of the plant is spaced apart from the ground at a considerably high position (for example, about 20 cm), the unharvested crop planted immediately below the battery installation unit is in the direction of travel when it contacts the bottom surface of the battery installation unit. Bends (runs away) so that the unharvested crop is not damaged.

  By the way, when the field is a ridge, the ridge groove width between the left and right ridges is about 30 to 35 cm, for example, and the width W (FIG. 3) between the outer ends of the left and right auxiliary wheels 61 and 61 is set as described above. If narrowed to about 35 cm, the crawler 12 of this harvester can be advanced into the trough. Since the left and right side surfaces of the groove are inclined in the spreading direction, the outer ends of the left and right auxiliary wheels 61 and 61 contact the left and right sides of the groove when the crawler 12 is advanced into the groove. However, even in the case of the garden, the side surface of the groove is not severely shaved.

  The grounding wheel 62 and the belt sliding contact ring 63 of each auxiliary wheel 61, 61 are in a relationship that the lower surface of the belt sliding contact ring 63 is in sliding contact with the lower surface running portion upper surface 13 a of the crawler elastic belt 13. The outer diameter of the ground ring 62 is larger than the outer diameter of the sliding contact ring 63. For example, the outer diameter of the belt-sliding contact ring 63 is about 10 cm, whereas the outer diameter of the ground ring 62 is about 15 cm. In addition, the lower surfaces of the grounding wheels 62, 62 in the left and right auxiliary wheels 61, 61 are installed at a height slightly above the lower surface of the crawler elastic band body 13, and the harvester travels in a horizontal posture. In the state, as shown in FIG. 3 or FIG. 4, the lower surfaces of the left and right grounding rings 62 are separated from the ground G by about 1 cm, for example.

  By the way, when the cultivated crop is harvested by the working vehicle (harvesting machine) of this embodiment, as shown in FIG. 1, the front end of the harvesting machine is moved forward in a state of being close to (or slightly touching) the field scene G. When the farm scene G is uneven, the front end of the harvester may be lifted from the farm scene G when the crawler 12 rides on the uneven section. And if it floats from the field scene G of the front-end part of a harvester during a harvesting operation in this way, it may have a bad influence during the harvesting operation of a crop. For example, in this embodiment, in the case where the root of the crop is excavated by the nail 31 during the harvesting operation, the root excavation fails or the root is cut by the root cutting device as in another harvesting machine. In the case of cutting, troubles such as cutting the stem part exposed near the ground surface (the leaf part falling apart) may occur.

  Therefore, in the work vehicle (harvesting machine) of the first embodiment (FIGS. 1 to 6), the work vehicle (harvesting machine) enters the bottom surface of the front end portion of the machine body frame 2 into the soil near the farm scene G when the work vehicle travels. Lifting prevention means 25 is provided for preventing the lifting of the front portion of the work vehicle.

  In the first embodiment, the lifting prevention means 25 is located on the left and right outer sides of two sets (a total of four) of dividers 23, 23... At the front of the body frame 2 as shown in FIG. One divider (23 in total) is installed immediately below each of the dividers 23 and 23. As shown in FIG. 5 and FIG. 6, each of the floating prevention means 25, 25 hangs a thin plate-like support material 26 downward from the lower surface of the grounding table 24 attached to the rear surface side of the outer divider 23, Further, a thin plate member 27 having a predetermined small area is attached to the lower end of the support member 26 in a substantially horizontal orientation.

  Various dimensions and shapes of the lifting prevention means 25, 25 in the first embodiment are not particularly limited, but are generally as follows.

  The support member 26 has a thin plate thickness of about 3 to 4 mm, a downward projecting length of about 30 to 50 mm, and a front-rear width of about 20 to 30 mm. In the first embodiment, the advancing front end face 26a of the support member 26 is inclined downward by a predetermined angle (for example, about 60 to 70 °), and the advancing front end face 26a is formed in an acute angle. It is sharpened so that the resistance when traveling in the soil is reduced.

  As the thin plate material 27 below the support material 26, for example, a flat plate having a thickness of 2 to 3 mm, a width of 20 to 30 mm, and a length of 50 to 60 mm can be used. The thin plate material 27 is formed in a trapezoidal shape so that the width of the leading end is narrow (for example, 15 to 20 mm) and the width of the trailing edge is wide (for example, 25 to 30 mm) in plan view. be able to. Further, a predetermined small length range (for example, a length range of about 10 mm from the tip) of the thin plate material 27 is inclined downward by a predetermined small angle (for example, about 10 °) with respect to the trailing side portion. .

  As shown in FIGS. 5 and 6, the floating prevention means 25 of the first embodiment has a lower surface of each grounding table 24, 24 in the two dividers 23, 23 on the left and right outer sides. The thin plate member 27 is welded to the lower end portion of the support member 26 in a substantially horizontal posture (a posture in which the front end side is slightly inclined downward).

  In the first embodiment, the grounding table 24 can be swung up and down, so that the angle of the thin plate material 27 of the grounding table 24 and the lifting prevention means 25 can be changed. That is, as shown in FIG. 5, the front part of the grounding table 24 is pivotally supported on the divider 23 by the shaft 24a (FIG. 5) so that the rear side of the grounding table 24 can be tilted up and down. Can be fixed by the stopper 24b at any contact angle.

  When the grounding table 24 is parallel to the farm scene G shown by the solid line in FIG. 5, the thin plate material 27 of the lifting prevention means 25 is inclined slightly downward toward the front, and the harvester advances. When traveling, the thin plate material 27 is subjected to the action of intruding into the deep side of the soil (the thin plate material 27 is difficult to lift. On the other hand, the rear side of the grounding table 24 is shown by a chain line (reference numeral 24 ') in FIG. When tilted downward, the thin plate member 27 assumes a substantially horizontal posture as shown by a chain line (reference numeral 27 '), and there is almost no submerging action in the soil by the thin plate member 27'.

  Thus, in the lifting prevention means 25 of the first embodiment, the angle (direction) at which the thin plate material 27 of the lifting prevention means 25 travels in the soil can be adjusted by adjusting the grounding angle of the grounding base 24. Depending on the weight balance between the front and rear of the harvester, the nature (softness) of the soil, etc., the front lower surface of the harvester can be adjusted so that it can travel forward with a suitable contact pressure with respect to the field scene G.

  The harvesting machine of the first embodiment (FIGS. 1 to 6) functions as follows. At the time of crop harvesting, the harvesting machine is driven by the traveling device 1 and the crops P vegetated on the field are harvested two by two (vegetation parts A1, A1). First, as shown in FIG. At the front part of the frame 2, the digging device 3 digs up the root part Pa of the leeks P (unravels the soil), holds the digging leeks P1 at the start end of the front transport part 4A and transports them backwards. As indicated by reference numeral P2, the rear conveying unit 4B is transferred from the terminal end of the front conveying unit 4A to the starting end, and then the posture tilting device 5 (upper clamping belt 52 and lower clamping belt 53) in the rear conveying unit 4B is vertical. In a state where the onion P3 in the posture is in the backward inclined posture (reference P4), it is sequentially dropped and stored in the storage container 7 immediately below it from the end portion of the rear transport unit 4B. Further, as the amount of the leek group stored in the storage container 7 increases (in proportion to the increase in weight), the storage container 7 is sequentially moved down by the weight of the leek group, and the post-conveyance The fall distance from the terminal part of the part 4B to the upper surface of the leek group deposited in the storage container 7 is always kept substantially constant. Thereby, the position and attitude | position of each leek P5 which falls in the storage container 7 sequentially from the terminal part of the back conveyance part 4B can be arrange | equalized sequentially.

  On the other hand, during the forward drive of the crawler 12, the belt body sliding contact wheels 63, 63 of the auxiliary wheels 61, 61 are in sliding contact with the lower surface running portion upper surface 13 a of the crawler elastic belt body 13 as described above. The auxiliary wheels 61 and 61 (including the grounding wheel 62) are continuously rotated in the traveling direction side (left rotation direction side in FIG. 1).

  By the way, during the harvesting operation by this harvester, the crawler 12 is driven forward by one row, but if only one row of the crawler 12 is grounded, the left and right balance becomes unstable and the harvester moves to the left or right. It is easy to tilt. When the harvester tilts to the left or right by a predetermined small angle (for example, a stable posture of about 3 to 4 °), the ground ring 62 of the auxiliary wheel 61 on the tilting side comes into contact with the ground and tilts the harvester. Supporting the power can prevent the harvester from tilting further.

  Accordingly, even if the crawlers 12 having a narrow width are used, the harvesting machine does not tilt greatly even if the left and right handle grip portions 19 are not supported so strongly during the harvesting operation. Harvesting and support are not required, and the harvesting work can be done easily. Further, the auxiliary wheels 61 and 61 prevent the harvester from inadvertently rolling over, so that safety is improved.

  Further, when the harvesting machine tilts and the grounding wheel 62 of the tilting auxiliary wheel 61 contacts the ground, the grounding wheel 62 contacts the ground while rotating in the traveling direction side. The grounding resistance (the action of pushing the ground soil forward with the grounding ring 62) does not occur. In particular, when the grounding wheel 62 in each auxiliary wheel 61, 61 has a larger diameter than the belt sliding contact ring 63, the circumferential surface speed of the belt sliding contact ring 63 (elastic band 13) when the crawler 12 is driven. The peripheral speed of the grounding wheel 62 is slightly higher than the traveling speed of the grounding wheel, and no grounding resistance is generated when the grounding wheel 62 is grounded. Therefore, when the grounding wheel 62 is grounded, the handle is not taken to the grounding side, so that the driving can be continued without a sense of incongruity.

  Further, during the harvesting operation, the belt body sliding contact rings 63, 63 of the left and right auxiliary wheels 61, 61 are in sliding contact with the lower surface running portion upper surface 13a of the crawler elastic belt body 13 (pressed from above). For example, even if there is a bump-like raised portion on the ground and the elastic band 13 rides on the raised portion, the elastic band 13 is not elastically deformed (does not bend upward). This means that the durability with respect to the elastic band 13 is improved.

  On the other hand, during the forward traveling of the harvesting machine, the lifting prevention means 25, 25 (thin plate materials 27, 27) on the lower surface of the front part of the machine advance in the soil below the farm scene G. Even if an action occurs such that the front part of the fuselage is lifted upwards, the thin plate member 27 in the substantially horizontal direction becomes a resistance and prevents the front part of the fuselage from being lifted.

  Accordingly, during the harvesting operation by the harvesting machine, the harvesting machine can be always driven in a stable posture (the state where the digging claw 31 is in the soil) by the lifting prevention means 25, so that the trouble due to the lifting of the front part of the machine body Can be prevented.

  7 and 8 show a modification (second embodiment) of the lifting prevention means 25 of the first embodiment. FIG. 7 in the second embodiment corresponds to FIG. 5 of the first embodiment, and FIG. 8 corresponds to FIG.

  7 and FIG. 8 also includes each grounding table 24 provided at the lower part of the two dividers 23 and 23 located on the outer sides of the two sets of dividers in FIG. , 24 hangs downward from the lower surface of. 7 and FIG. 8 is used as the anti-lifting means 25 in which the lower side (reference numeral 29) of the single plate 28 is bent inward into a substantially "<" shape. The upper end portion is welded to the lower surface of the grounding table 24 with the upper side in a vertical posture. In addition, the traveling side front end surface 28a of the plate member 28 is also inclined downward by a predetermined angle (for example, an angle of about 60 to 70 °), and the traveling side front end surface 28a is sharpened in an acute angle so as to proceed in the soil. The resistance at the time is made small.

  Even in the floating prevention means 25, 25 of the second embodiment (FIGS. 7 and 8), the bent portions (lateral bending portions) 29, 29 of the plate members 28, 28 are lifted at the front of the body when traveling in the soil. It becomes resistance when trying to rub off and prevents the front part of the aircraft from lifting.

  1 is a traveling device, 2 is a body frame, 3 is a digging device, 4 is a conveying device, 4A is a front conveying unit, 4B is a rear conveying unit, 5 is a posture tilting device, 7 is a storage container, 8 is a guide device, 9 is Upper biasing means (coil spring), 23 is a divider, 24 is a grounding base, 25 is a lifting prevention means, 42 is a front conveying section clamping belt, 52 is a rear conveying section upper clamping belt, and 53 is a rear conveying section under clamping A belt, 61 an auxiliary wheel, 62 a grounding wheel, 63 a belt sliding contact wheel, 64 a common shaft, and P a crop (green onion).

Claims (2)

A farm field traveling work vehicle configured to travel a farm scene (G) by a traveling device (1) provided at a lower portion of a machine body frame (2) of the working vehicle,
The traveling device (1) employs a crawler (12) that can circulate and drive an endless belt-like elastic band (13),
The crawler (12) is installed only in one row with the crawler (12) being positioned near the center of the left and right width of the work vehicle.
The left and right auxiliary wheels (61, 61) that can come into contact with the ground are arranged on the left and right sides of the crawler (12), and whether the lower surface of each auxiliary wheel (61, 61) is substantially the same as the lower surface of the crawler (12). While protruding slightly left and right in a state of being positioned at a height slightly higher than that,
Each auxiliary wheel (61, 61) has a ground ring (62) that contacts the ground at an axially outer position and an elastic band (13) at an axially inner position with respect to the common shaft (64). A belt body sliding contact wheel (63) that is in sliding contact with the upper surface (13a) of the lower surface traveling portion is attached in a state where both wheels (62, 63) are provided,
The belt-sliding contact ring (63) rotates in sliding contact with the upper surface (13a) of the lower surface running portion of the elastic belt (13), so that the grounding wheel (62) is rotated by the belt-sliding contact ring (63). )
An agricultural field traveling work vehicle. In claim 1,
Lifting prevention means (24) is provided on the lower surface of the front end portion of the machine body frame (2) to prevent the front part of the work vehicle from being lifted by proceeding in a state of entering the soil near the farm scene (G) when the work vehicle is traveling. Provided,
An agricultural field traveling work vehicle.

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