JPH09107712A - Apparatus moving in furrow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an apparatus moving in a furrow such as a transplanter capable of coping with the variation of the width between ridges. SOLUTION: A transmission case 31 is supported at the inner right and left sides by a mission case 6 in a state freely movable in lateral direction. An outer boss 33 fixed to the outer right and left sides of the transmission case 31 is supported in a laterally movable manner on a support 38 supported by the mission case 6. The position of the transmission case 31 is freely changeable between a wide position corresponding to a wide tread of driving wheels and a narrow position corresponding to a narrow tread of the wheels. The outer boss 33 is provided with an inner stopper 36A contacting with the support 38 at the broad width position and an outer stopper 46 contacting with the support 38 at the narrow width position. The lateral movement of the transmission case is restricted by a positioning member 48 inserted between the support 38 and the outer stopper 46 at the broad width position and between the support 38 and the inner stopper 36A at the narrow width position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furrow running device that runs across ridges, a transplanter for transplanting seedlings such as vegetables into the ridges, and weeding, sowing, harvesting while running over other ridges,
It is used in work machines that perform work such as thinning.

[0002]

2. Description of the Related Art Conventionally, as a transplanter for transplanting seedlings such as vegetables into ridges, an engine, a transmission case, and a traveling machine body supported by front left and right wheels and rear left and right wheels and traveling across the ridges, On the left and right sides of the mission case,
The output shaft, which is driven to rotate by the power of the engine, is provided in the left-right direction, and the left and right rear wheels are equipped with a transmission case that houses the transmission mechanism that transmits the power from the output shaft. There are some that were designed to be planted.

[0003]

By the way, the width and height of the ridges are not constant, but vary depending on the variety of seedlings to be planted, the climate, and the like. Then, in the conventional case, one with a wide gap between the left and right transmission cases and one with a narrow gap between the left and right transmission cases are used for traveling in a wide ridge and in traveling in a narrow ridge. I had to make it.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a furrow running device which can deal with wide and narrow furrows.

[0005]

The technical means taken by the present invention to achieve the above-mentioned object is to provide a traveling machine body which includes an engine and a transmission case and which is supported by left and right driving wheels and travels across a ridge. A transmission case is provided on each of the left and right sides of the transmission case, the output shaft being rotationally driven by the power of the engine is provided in a protruding manner in the left-right direction, and a transmission mechanism for transmitting the power from the output shaft to the left and right drive wheels is housed. In the furrow traveling device provided, an inner side in the left-right direction of the transmission case is supported by the transmission case so as to be movable left and right, and an outer boss portion fixed to an outer side in the left-right direction of the transmission case is supported on the traveling body side. By supporting the support case so that it can move in the left-right direction, the transmission case can be repositioned between a wide position with a wide driving wheel width and a narrow position with a narrow driving wheel distance. The side boss part is provided with an inner stopper part that contacts the support side at the wide position and an outer stopper part that contacts the support side at the narrow position, and between the support side and the outer stopper part side at the wide position. It is characterized in that it is provided with a positioning member which is intervened and intervenes between the support side and the inner stopper portion side at a narrow position to restrict the lateral movement of the transmission case.

Further, it is preferable that the positioning member is detachably attached to the outer boss portion in the radial direction. Further, the transmission case is supported around the output shaft so as to be vertically swingable relative to the traveling machine body, and front wheels for supporting the traveling machine body are provided in front of the drive wheels, and the front wheels are provided on the traveling machine body side to the traveling machine body. On the other hand, it is attached to the front wheel support arm that is supported to swing up and down relatively around the left and right axis, and the front wheel support arm moves up and down relative to the traveling machine body in conjunction with the vertical up and down movement of the transmission case relative to the traveling machine body. In order to move, interlockingly connected to the transmission case side with a connecting member, to the connecting portion of the connecting member of the front wheel support arm,
It is preferable to provide a first connecting portion connected at a wide position of the transmission case and a second connecting portion connected at a narrow position of the transmission case.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows a transplanter 1 for transplanting seedlings of vegetables or the like into the ridges. In FIG. 5, the vegetable transplanter 1 is a walking type having a transplanter 3 and a steering handle 4 behind a traveling machine body 2. Soil block seedlings are automatically planted in the ridges 5 at predetermined intervals while running over 5 in the longitudinal direction.

The direction of travel of the transplanter 1 is referred to as the front-back direction, and the lateral direction perpendicular to the direction of travel is referred to as the left-right direction. The traveling body 2 has a body frame 7 on the front of the mission case 6.
Is mainly fixed by mounting the engine 8 and the like on the machine body frame 7 while mounting and fixing the front wheel 10 on the left and right sides of the mission case 6, machine body frame 7, engine 8 and the like. And rear wheel (driving wheel) 1
It is movably supported by 1.

The transplanting device 3 is provided on a transplanting frame 12 mounted behind the traveling machine body 2, and has a planting means 13 for planting seedlings in the ridges 5, and a seedling for supplying seedlings to the planting means 13. It is mainly configured to include a supply device 14, a soil-covering ring 15 that covers and suppresses the roots of the planted seedlings, and a perforation means 16 that forms holes for planting in the multi-film that covers the ridges 5.

The transplantation frame 12 is composed of a main frame 12A whose front portion is attached and fixed to the mission case 6, and a movable frame 12B whose front portion is pivotally attached to the mission case 6 so as to be rotatable about its left and right axes. , Main frame 12A
The seedling supply device 14 is provided on the
The steering handle 4 is attached to the rear end of 2A, and the planting means 13, the earth covering wheel 15 and the perforating means 16 are supported by the movable frame 12B.

The planting means 13 is supported by a swinging link mechanism so as to move up and down while moving up and down, and seedlings are dropped and supplied at the upper part of its locus, and a beak-shaped openable opener is provided at the lower part. The opener opens back and forth when it enters the ridge 5 on the lower end side of the locus to form a planting hole in the ridge 5, and the seedling held in the planting means 13 can be planted in the planting hole. It is like this.

The seedling feeding device 14 is arranged in front of the seedling tray feeding device 18 and a seedling tray feeding device 18 that intermittently feeds a seedling tray 17 containing a large number of soil block seedlings vertically and horizontally. It is composed of a seedling dispensing device 19 which takes out the seedlings one by one from the tray 17 and conveys them to the planting means 13. A pair of soil covering rings 15 are arranged right and left behind the planting means 13 so as to sandwich the seedling planting portion, roll on the upper surface of the ridge 5, support the rear portion of the movable frame 12B, and remove the soil at the root of the seedling. Press from both sides to crush the soil at the same time.

The piercing means 16 is supported by a parallel link so as to move up and down in conjunction with the swinging link mechanism of the planting means 13, and when the piercing means 13 descends, a heating element provided at the lower end thereof is used as a multi-hole. By pressing it against the film, holes for implantation are formed in the mulch film.
As shown in FIGS. 5, 6 and 7, a support frame 21 on which the battery 20 is mounted is fixedly attached to the front portion of the machine body frame 7, and a lower portion of the support frame 21 has a horizontal axis. The support cylinder 22 is fixed, and the left and right inner ends of a pair of left and right front wheel support shafts 23 are rotatably inserted around the left and right shafts, and the left and right outer end sides of the left and right front wheel support shafts 23 are fixed to the support cylinder 22. A mounting tube 24 is fitted on the outside.

A front wheel support arm 25 is attached to each of the left and right mounting cylinders 24.
The upper end side of the front wheel 10 is connected and fixed, and the front wheel 10 is attached to the lower end side of each front wheel support arm 25 via the axle 26 so as to be rotatable around the left and right shafts. The outer end sides of the left and right front wheel support shafts 23 and the mounting cylinder 24 are formed in a hexagonal cross section so as to rotate integrally, and the left and right front wheels 10 swing up and down about the front wheel support shaft 23. It is free. Further, the outer ends of the left and right front wheel support shafts 23 and the mounting cylinder 24 are fixed by pins 27 penetrating both of them, and the insertion holes 28 of the pins 27 formed on the outer end sides of the left and right front wheel support shafts 23 are axial centers. There are multiple (three in the illustrated example) formed in the direction, and the left and right positions of the front wheels 10 can be adjusted (that is, the wheel distance of the front wheels 10 can be adjusted).
It has been.

The rotational power of the engine 8 is input to the power transmission device in the mission case 6, and the traveling system power is output from the output shaft 29 protruding to the left and right of the mission case 6. The power transmitted to the left and right output shafts 29 is independently connected and disconnected by the individual clutches. As shown in FIG. 1, FIG. 2 and FIG. 3, transmission cases 31 supporting the rear wheels 11 are arranged on the left and right sides of the mission case 6, and the output shaft 29 is provided on the left and right sides of the mission case 6. The support cylinders 30 through which are inserted are fixedly attached, and each support cylinder 30 has a cylindrical inner boss portion 32 penetrating and fixed to the upper side of the transmission case 31 in the left-right direction. It is movably mounted and supported so as to be rotatable around the left and right axes.

A cylindrical outer boss portion 33 is fixed to the outer side of the upper side of each transmission case 31 in the left-right direction, and penetrates through the case 31, and a bearing 34 is provided on the inner peripheral side of the outer boss portion 33. The drive sprocket 35 is rotatably supported by the drive sprocket 35, and the drive sprocket 35 is spline-fitted to the outer end side of the output shaft 29 in the left-right direction so as to be movable left and right. The left and right outer sides of the outer circumferences of the left and right outer boss portions 33 are formed to have a slightly smaller diameter, and a collared sleeve 36 having a small diameter is galvanized, and is fixed by external fitting from the outer side in the left and right direction by interference fitting. A support cylinder 38, in which a bush 37 is fitted and fixed on the inner peripheral side, is externally fitted to the sleeve 36 so as to be relatively slidable in the left-right direction, and a mounting plate 39 is welded and fixed to the support cylinder 38.

The mounting plate 39 is mounted and fixed to a support frame 40 fixed to the mission case 6, and the support frame 40 has a tubular body 41 arranged in the left-right direction below the mission case 6 and an intermediate portion of the tubular body 41. And a support plate 43 welded and fixed to the left and right end portions of the tubular body 41.
2 is attached and fixed to the lower portion of the side of the mission case 6 via bolts 44, and the attachment plate 39 is attached and fixed to the left and right support plates 43 by a pair of upper and lower bolts 45.

On the outer side of the sleeve 36 of the outer boss portion 33, a zinc-plated collar 46 is externally fitted and retained by a retaining ring 47. With the above structure, the left and right transmission cases 31 are independently movable in parallel in the left-right direction and rotatable about the output shaft 29. By moving the transmission cases 31 left and right, the wheel distance of the rear wheel 11 can be increased. It can be adjusted. To adjust the wheel distance of the rear wheel 11 by moving the transmission case 31, as shown in FIG. 1, the collar (outer stopper portion) 46 is used for the support cylinder 3.
As shown in FIG. 2, the collar portion (inner stopper portion) 36 </ b> A of the sleeve 36 contacts the support tube 38.
It is possible to adjust in two steps, a wide position to contact with, and it is possible to cope with the difference in width (wide or narrow) between the full-scale multi-ridge and the open high ridge.

The movement of the transmission case 31 is restricted between the collar portion 36A of the sleeve 36 and the support cylinder 38 at the narrow position, and between the collar 46 and the support cylinder 38 at the wide position. This is done by interposing the positioning member 48 in the. As shown in FIG. 4, the positioning member 48 is composed of a U-shaped plate material, and is intervened by fitting the circular arc portion 48A of the positioning member 48 to the sleeve 36 from the outside in the radial direction, and extends over the linear portions 48B on both end sides. Head pin 49
It is prevented by pulling through. Further, the headed pin 49 is prevented from being pulled out by the β pin 50 or the like inserted through the tip portion thereof.

A driven sprocket 52 fixed to the axle 51 is provided at a lower portion of the transmission case 31, and the chain 5 extends between the drive sprocket 35 and the driven sprocket 52.
3, the boss portion 11A of the rear wheel 11 is externally fitted and attached to the axle 51, and the rear wheel 11 is rotationally driven by the power of the engine 8. Also,
The bosses 11A of the left and right rear wheels 11 and the axle 51 are fixed by a pin penetrating them, and a plurality of pin insertion holes 54 (three in the illustrated example) are formed in the axle 51 in the axial direction. The left / right position of the rear wheel 11 is adjustable in accordance with the left / right position adjustment interval of the front wheel 10 (that is, the wheel distance of the rear wheel 11 can be adjusted).

In the illustrated example, the front and rear wheels 10, 11 on the right side
Is the position when the transmission case 31 is in the wide position, and the left and right front wheels 10 and 11 are the positions when the transmission case 31 is in the narrow position. Both are set to the wide position or the narrow position. As shown in FIG. 1 and FIGS. 6 to 9, rolling shafts 55 arranged in the left-right direction are provided in the front-rear intermediate portion of the machine body frame 7.
Is supported by a bearing body 56 so as to be rotatable about the left-right axis and movable in the front-rear direction. An elevating cylinder 57 is arranged in front of the middle portion of the rolling shaft 55 in the left-right direction and fixed to the machine body frame 7. There is. The elevating cylinder 57 is composed of a hydraulic cylinder, and the piston rod 57A of the cylinder 57 is connected to the bearing body 56, and the rolling shaft 55 can be moved back and forth by moving the piston rod 57A back and forth.

The left and right bearings 56 can be fixed to the machine body frame 7 by fixing means. An outer first bracket 58 and an inner second bracket 59 are fixed to both left and right sides of the rolling shaft 55, and a front connecting bracket 60 is fixed to each of the left and right front wheel support shafts 23. Outer boss part 3
A rear side connecting bracket 61 is fixed to the front side 3, and each of the left and right front side connecting brackets 60 is provided with an outer first connecting portion 60A and an inner second connecting portion 60B. The first and second brackets 58 and 59 on the right side project downward, and the first and second brackets 58 and 59 on the left side and the front and rear connection brackets 60 and 61 project upward. I have.

The first bracket 58 or the second bracket 5
9 and the rear connection bracket 61 are connected by a connection link 62, and the front connection bracket 60 and the rear connection bracket 61 are connected by a connection rod 63. The connecting link 62 and the connecting rod 63 are provided with fork joints 62A and 63A on the front and rear end portions, respectively, and these fork joints 62A and 63A are attached to the brackets 58, 59 and 6 respectively.
0 and 61 are pivotally connected via pins to be rotatable about left and right axes.

When the transmission case 31 is set to the wide position, the front bifurcated joint 62A of the connecting link 62 is moved to the first position.
The front fork joint 63A of the connecting rod 63 is connected to the first connecting portion 60A of the front connecting bracket 60 while being connected to the bracket 58, and when the transmission case 31 is in the narrow position, the front fork joint 62A of the connecting link 62 is formed. Is connected to the second bracket 58 and the connecting rod 63
Front fork joint 63A of the front side connecting bracket 60
It is connected to the connecting portion 60A.

Therefore, by moving the piston rod 57A of the lifting cylinder 57 back and forth, the left and right connecting links 62 are pushed back and forth, and the rear connecting bracket 61 is pulled.
The transmission case 31 swings up and down relative to the traveling machine body 2 via the connecting rod 63, and the connecting rod 63 is pushed back and forth to support the front wheel via the front connecting bracket 60, the front wheel support shaft 23, and the mounting cylinder 22. The arm 25 swings up and down relative to the traveling machine body 2, whereby the left and right front and rear wheels 1
Since 0 and 11 simultaneously move up and down with respect to the traveling body 2 of the four wheels and the front and rear wheels 10 and 11 are in contact with the ground, the traveling body 2 moves up and down to follow the change in the height of the ridge 5. The transplantation device 3 can be moved up and down.

In the above embodiment, the distance LF between the swing fulcrum of the front wheel support arm 25 and the pivot of the connecting rod 63 to the front connecting bracket 60, the front wheel supporting arm 25 and the front connecting bracket 60. The angle ΘF formed by and the swing fulcrum of the transmission case 31 and the pivot fulcrum of the connecting link 62 to the rear connecting bracket 61, the swing fulcrum of the transmitting case 31, and the rear connecting bracket of the connecting rod 63. The distance LR2 from the pivot point to 61, the angle ΘR formed by the transmission case 31 and the rear connecting bracket 61, and the length of the connecting rod 63 are formed so as to match left and right,
When the traveling vehicle body 2 is moved up and down, the relationship between the common tangent line on the lower surface side of the front and rear wheels 10 and 11 and the ground is the same on the left and right sides. By parallel movement, the posture of the traveling machine body 2 is stabilized. Further, since the lengths of the left and right connecting rods 63 can be equalized, it is possible to prevent the right and left connecting rods 63 from being erroneously assembled.

On the other hand, by moving the piston rod 65A of the rolling cylinder 65 back and forth, the rolling shaft 55 is rotated around the left and right axes, and the left and right connecting links 62 are pulled forward and the connecting rod 63 is moved forward. And the other left and right connecting links 62 are pushed rearward, and the connecting rod 63 is pulled rearward.
Even on a sloping ground, the traveling machine body 2 and the transplantation device 3 can be maintained in a horizontal state.

In the above embodiment, the connecting link 6
Since the positions of the bifurcated joints 62A before and after 2 in the left-right direction are displaced, a large bending stress acts on the bifurcated joints 62A when the traveling machine body 2 is vertically moved or horizontally controlled. The plate material connecting the front and rear bifurcated joints 62A is widened so that the front and rear bifurcated joints 62A are widened, and the joint portion of the plate materials is extended to the vicinity of the pin hole of the bifurcated joint 62A.

[0029]

According to the present invention, a traveling body provided with an engine and a mission case and traveling across ridges supported by left and right driving wheels is provided, and is rotated by the power of the engine on both left and right sides of the mission case. In a furrow running device having a transmission case in which a driven output shaft is provided so as to project in the left-right direction, and a transmission mechanism that transmits power from the output shaft to the left and right drive wheels is housed, in the left-right direction inward of the transmission case. Side is movably supported in the left and right direction, and the outer boss part that is fixed to the outer side in the left and right direction of the transmission case is movably supported in the left and right direction by a support supported on the traveling body side. Can be moved between a wide position with a wide driving wheel width and a narrow position with a narrow driving wheel distance.The inner boss that contacts the support side at the wide position on the outer boss The upper part and the outer stopper part that abuts on the support side at the narrow position are provided, and they are intervened between the support side and the outer stopper part side at the wide position, and the support side and the inner stopper part side at the narrow position. By providing a positioning member that intervenes between the ridge and the ridge to regulate the lateral movement of the transmission case, the ridge can be made wider or narrower, and the distance between the transmission cases can be adjusted depending on the width of the ridge. In doing so, the positioning member is removed, the transmission case is slid in the left-right direction until the stopper portion comes into contact with the support side, and then the positioning member is attached, so that the interval can be easily adjusted. Further, when the distance between the transmission cases is increased, the effect that the transmission case side does not come off from the output shaft is obtained.

Further, the positioning member can be attached to and detached from the outer boss portion in the radial direction. Further, the interval adjustment operation of the transmission case becomes easy. Further, the transmission case is supported around the output shaft so as to be vertically swingable relative to the traveling machine body, and front wheels are provided in front of the drive wheels for supporting the traveling machine body.
The front wheel is attached to a front body supporting arm supported on the traveling body side so as to be vertically swingable relative to the traveling body, and the front wheel supporting arm is vertically swingable relative to the traveling body of the transmission case. A first connection that is interlockingly connected to the transmission case side by a connecting member so as to swing up and down relative to the traveling machine body in conjunction with each other, and is connected to a connecting portion of the connecting member of the front wheel support arm at a wide position of the transmission case. By providing the portion and the second connecting portion which is connected at the narrow position of the transmission case, it is possible to correspond to the one provided with the mechanism for moving the traveling machine body up and down.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a left side support structure of a transmission case of a transplanter.

FIG. 2 is a sectional view showing a right side support structure of a transmission case of the transplanter.

FIG. 3 is a rear view showing a schematic support structure of a transmission case of the transplanter.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an overall side view of the transplanter.

FIG. 6 is a plan view of a traveling vehicle body of the transplanter.

FIG. 7 is a partial cross-sectional plan view of the front part of the traveling vehicle body of the transplanter.

FIG. 8 is a plan view of a rear portion of the traveling vehicle body of the transplanter.

FIG. 9 is a side view showing an elevating mechanism of the traveling machine body.

[Explanation of symbols]

 2 traveling machine body 5 ridge 6 mission case 8 engine 11 rear wheel (driving wheel) 29 output shaft 31 transmission case 33 outer boss portion 38 support 36A collar portion (inner stopper portion) 46 collar (outer stopper portion) 48 positioning member

Claims (3)

[Claims] 1. An engine, a mission case, and a traveling machine body that is supported by left and right drive wheels and travels across a ridge, and output shafts that are rotationally driven by the power of the engine are provided on both left and right sides of the mission case. In a furrow traveling device that is provided with a transmission case that projects in the left-right direction and houses a transmission mechanism that transmits power from the output shaft to the left and right drive wheels, the left and right inner sides of the transmission case are the left and right sides of the transmission case. In addition to being movably supported, the outer boss portion that is fixed to the outer side in the left-right direction of the transmission case is movably supported in the left-right direction by a support that is supported on the traveling body side. Can be changed between a wide position with a wide width and a narrow position with a narrow driving wheel distance, and the outer boss part
An inner stopper part that contacts the support side at the wide position and an outer stopper part that contacts the support side at the narrow position are provided, and the narrow stopper is inserted between the support side and the outer stopper part at the wide position. A furrow traveling device comprising a positioning member which is interposed between the support side and the inner stopper portion side at a position to regulate the lateral movement of the transmission case. 2. The furrow traveling device according to claim 1, wherein the positioning member is detachably attached to the outer boss portion in the radial direction. 3. A front wheel supporting a transmission case around an output shaft so as to be vertically swingable relative to the traveling machine body, and supporting the traveling machine body in front of a drive wheel, and the front wheel is provided on the traveling machine body side. It is attached to the front wheel support arm that is supported to swing up and down about the left and right axis relative to the traveling machine body, and the front wheel supporting arm is linked to the traveling machine body in conjunction with the vertical movement of the transmission case relative to the traveling machine body. A first connecting portion, which is interlockingly connected to the transmission case side by a connecting member so as to swing up and down relatively, and is connected to a connecting portion of the connecting member of the front wheel support arm at a wide position of the transmission case, and a narrow width of the transmission case. Second linked in position
The furrow running device according to claim 1 or 2, further comprising a connecting portion.