JP2003304717A - Leveling member in transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensing and leveling member in a transplanter, capable of effectively leveling a front area of a sensor float so as to maintain accuracy of planting depth. <P>SOLUTION: This sensing and leveling member 18 in the transplanter is positioned in the front area of the sensor float 7C used as an ascending and descending-control mechanism, wherein the sensor float 7C controls height of a transplanting working machine 4 which is connected to a traveling machine body 3 so as to be freely ascended and descended, and the sensing and leveling member 18 for smoothing and leveling the surface of a farm field is positioned so as to cover a region which includes the front area of the sensor float 7C and in which raised soil between both wheels 1, 2 is dropped, so that the accuracy of the planting depth is maintained. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground leveling member for a transplanting machine such as a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, a transplanting work machine is vertically movably connected to a traveling machine supported by wheels, and the transplanting work machine is swingably equipped with a plurality of floats for grounding following a field scene. Based on the rocking of the sensing float on the center side of the machine along the field scene, an elevation adjustment mechanism is provided to adjust the height of the transplant work machine so as to maintain the planting depth. A riding rice transplanter equipped with a sensing ground leveling member for leveling the ground is known.

[0003]

However, since the above-mentioned ground leveling member is composed of rollers, it pushes mud forward during ground leveling, which may adversely affect the operation of the sensing float and cause an error in the planting depth. There was a drawback. In addition, the right and left width of the ground leveling member is almost the same as the left and right width of the sensing float, and it is not possible to level the lifted soil (falling soil) by the wheels falling on the passage of the sensing float, and the planting depth by the falling soil. There is also a drawback that it has a bad effect on the control of the depth.

[0004]

The ground leveling member in the transplanter of the present invention for solving the above-mentioned problems is constructed by connecting a transplanting machine 4 to a traveling machine body 3 supported by wheels 1 and 2 so as to be able to move up and down. The transplanting work machine 4 is provided with a plurality of floats 7 which are grounded following the field scene so as to be swingable, and the planting depth is determined based on the rocking of the sensing float 7C on the center side of the planting work machine 4 along the field scene. In the transplanting machine, which is provided with an elevation adjusting mechanism for adjusting the height of the transplanting machine so as to maintain the height, and a sensing leveling member 18 for leveling the field scene in front of the sensing float 7C, The first feature is that the ground leveling member 18 is provided so as to reach the falling range of the lifting soil between the wheels 1 and 2 including the front of the sensing float 7C.

Further, a side leveling member 16 is provided in front of the side float 7S positioned on the side of the sensing float 7C, and the side leveling member 16 is eccentrically arranged behind the sensing leveling member 18 for sensing. The second feature is that the lateral width L2 of the leveling member 18 is made larger than the lateral width L1 of the sensing float 7C.

A third feature is that the left and right ends of the sensing ground leveling member 18 and the side ground leveling member 16 are partially or wholly overlapped in a front view and a rear view.

A fourth feature is that the width L6 between the outer ends of the left and right lateral grounding members 16 is made larger than the width L5 between the outer ends of the left and right outermost side floats 7S.

[0008]

1 and 2 are a plan view and a side view of a rice transplanter according to the present invention, which are supported by left and right front wheels 1 and left and right rear wheels 2 which are steered. A planting work machine 4 is connected to the rear of the traveling machine body 3 via an elevating link 5 so as to be vertically movable. The planting work machine 4 is provided with a plurality of planting cases 6 for planting in the left-right direction, and a float 7 is attached below the planter case 6.

A planting beak 8 is provided on the side of the planter case 6, and the planting work machine 4 is lowered in the field so that the float 7 is grounded to drive the planting beak 8. By making the traveling machine body 3 travel, the planting beak 8 scrapes the seedlings from the planting table 9 of the planting work machine 4 and plantes them in the field.

The elevating link 5 is controlled so that it can be automatically moved up and down by a conventionally known hydraulic pressure sensing mechanism (elevating adjustment mechanism) provided on the traveling machine body 3 side. The planting work machine 4 is moved up and down to maintain the planting posture of the planting work machine 4 during the planting work to maintain the planting depth (keep it constant). At this time, the hydraulic pressure sensing mechanism uses the central float (center float) 7C that touches and touches the field scene as in the conventional case as a sensing float.
It operates based on the swing of the center float 7C.

On the other hand, a bracket 11 is provided so as to project from the planter case 6 side toward the front, and a support shaft 12 is rotatably supported at the front end portion of the bracket 11. And at the front positions on both the left and right sides of the support shaft 12,
The shafts 13L and 13R are integrally attached via a plurality of arms 14 arranged in the left-right direction so as to be vertically swingable and positionable, and the shafts 13L and 13R are attached to both left and right sides of the center float 7C. A lateral grounding member 16 that is located in front of the left and right floats (side floats) 7S located at, and that grounds the upper surface of the field by landing on the field is leveled.

The arm 14 on the side of the center float 7C in each arm 14 that supports both the shafts 13L and 13R.
The support arms 17 are integrally fixed to a at the front side, and the front ends of the support arms 17 are located in front of the center float 7C and are grounded to the field to even out the upper surface of the field. A central ground leveling member 18 for leveling is integrally fixed, and is provided in front of the side leveling member 16 so as to be offset in the front-rear direction with respect to the side leveling member 16.

At this time, both the lateral grounding member 16 and the central grounding member 18 have a rake shape in which plate materials are arranged in a comb shape as teeth, and are lightweight and inexpensive.
The central grounding member 18 is arranged between the left and right wheels 1 including the front of the center float 7C and between the left and right rear wheels 2 so as to reach the fall range of the lifting soil of the wheels 1 and 2, and the left and right width of the center float 7C. Left and right width L2 larger than L1
The left and right side ends of the central grounding member 18 project outside the left and right side ends of the center float 7C.

The lateral grounding member 16 is composed of an outer grounding member 16a located on the outer side of the planting work machine 4 and an inner grounding member 16b located on the inner side, and the outer end of the outer grounding member 16a. Width L between the inner ground leveling member 16b
3 is larger than the left-right width L4 of the side float 7S, the outer end of the outer leveling member 16a projects outside the outer end of the side float 7S, and the inner end of the inner leveling member 16b projects inward of the inner end of the side float 7S. . Thus, the width L6 of the leveling range of all the leveling members is larger than the width L5 of the leveling range of all floats 7, and L6 includes L5.

The lateral grounding member 16 and the central grounding member 1
8 means that the inner side grounding member 16b of the lateral side grounding member 16 and both ends of the central grounding member 18 are overlapped so as to overlap each other in the front view and the rear view. The inner ground leveling member 1
The inner end of 6b never contacts the center float 7C.

When the planting work is performed in the field as described above, before the center float 7C passes, the central grounding member 18 is provided between the left and right front wheels 1 and the left and right rear wheels 1 which are the passages of the center float 7C in the field. Between two,
The soil lifted by the wheels 1 and 2 evens out the dropped soil, and the center float 7C passes over the field scene in the leveled state.

Further, the lateral gap S between the center float 7C and the side float 7S is such that the lateral grounding member 16 and the central grounding member 18 are overlapped with each other in a portion where the inner grounding member 16b and the central grounding member 18 overlap each other. By both, the part where the inner ground leveling member 16b and the central ground leveling member 18 do not overlap is leveled by either the side ground leveling member 16 or the central leveling member 18. Although the outer leveling member 16a and the inner leveling member 16b are discontinuous, the side float 7S is leveled between the outer leveling member 16a and the inner leveling member 16b.

That is, the central soil leveling member 18 evens the lifted soil (falling soil) by the wheels 1 and 2 which has fallen in the passage (between the left and right wheels) of the center float 7C in the field, and at the same time, the center float 7C At least one of the lateral grounding member 16 and the central grounding member 18 evens the above-mentioned fallen soil between the side float 7S and the remaining embankment, and further lateralizes a predetermined area outside the side float 7S. The ground leveling member 16 (outer leveling member 16a) levels the ground evenly.

For this reason, the center float 7C is prevented from riding on the above-mentioned fallen soil and causing an inconvenience such as an error in the planting depth, improving the accuracy of the planting depth and leaving the fallen soil on the field. Inconveniences such as In addition, before the ground leveling by the float 7, the ground leveling members are leveling a wider area than the leveling range of the float 7, and especially the left and right outer leveling members 16a perform leveling about half the space between the next planting section and the ground leveling section. , The leveling performance of the field is improved, and especially the field where the upper surface is rough,
For example, even in a headland of a field where a lot of turning marks of the traveling machine body 3 remain, the levelness of the field is improved, and the accuracy of controlling the planting depth is maintained even in the work of planting in the headland, and Depth can be maintained as well as the rest of the headland. At this time, since the central ground leveling member 18 and the lateral ground leveling member 16 both have a rake shape, mud, water, etc. are smoothly discharged rearward through the rake gap at the time of ground leveling, and the mud, water, etc. are forwarded or left and right. It does not adversely affect the sensing of the center float 7C by being pushed out to, but in addition to this, since the central grounding member 18 and the side grounding member 16 are deviated in the front-rear direction, the mud, water, etc. can be removed. Also, the water can be smoothly flowed backward even through the front-rear gap between the central grounding member 18 and the lateral grounding member 16.

On the other hand, on the rear surface side of the seedling placing table 9, a base end side is swingably supported and a stopper arm 19 is provided, and the tip end side of the stopper arm 19 and the support arm 17 are connected. They are connected via the member 21. At this time, the connecting member 21 has two pistons 23 inserted in a cylinder 22 as shown in FIG.
A piston rod 24 is attached so as to pass through both pistons 22 and 23, and a compression spring 26 externally fitted to the piston rod 24 is provided between both pistons 23. The inner cylinder 27 for positioning is fixedly inserted.

The piston rod 24 is connected to the support arm 17, and the mounting portion 28 provided on the upper end side of the inner cylinder 27 is connected to the stopper arm 19. The support arm 17 and the planting work machine 4 side have a tension spring 29.
Are connected to each other by means of which the extension spring 2
The support arm 17 swings upward together with the arm 14 by the urging force of the armature 9. However, when the piston 23 on the upper side comes into contact with the end of the inner cylinder 27, the urging force of the tension spring 29 (this The compression spring 26 receives the downward sliding of the piston 23 by the urging force, and the support arm 17 (support shaft 12) is elastically positioned and held at a position where the urging forces of the two springs 29, 26 are balanced. .

As a result, as shown in FIG. 4, when the planting work machine 4 is in contact with the field, the central leveling member 18 and the lateral leveling member 16 are applied with a predetermined pressure by the compression spring 26 of the connecting member 21. It is pressed against the field scene, that is, it is elastically held in the working position A where the compression spring 21 can be used as the positioning means to perform the field preparation work in the field, and the land preparation work (leveling work) in the field scene as described above is accurately performed. You can do it well.

At this time, as shown in FIG. 5, the central leveling member 18 or the lateral leveling member 16 is brought into contact with the stone 31 in the field, and the central leveling member 18 or the lateral leveling member 16 side (support arm 17). When the side) is overloaded, the piston rod 24 of the connecting member 21 moves from the state of the connecting member 21 during the land leveling work in the field shown in FIG. 3A to the piston rod 24 of the connecting member 21 as shown in FIG. 3B. The support arm 17, the arm 14, and the support shaft 12 are integrally swung around the support shaft 12 by contracting operation against the urging force of the compression spring 26, and the central grounding member 18
The lateral grounding member 16 escapes and retreats, and the central grounding member 18, the lateral grounding member 16, and the arm 1 due to the overload.
4, support arm 17, connecting member 21, stopper arm 1
It is possible to prevent damage of the ground leveling members 16 and 18 made of 9 or the like on the support mechanism 32 side.

On the other hand, an operating lever 34 is attached to the swinging fulcrum shaft 33 of the stopper arm 19 so as to swing integrally with the stopper arm 19, and the operating lever 34 projects forward through a lever guide 36. ing. At this time, the lever guide 36 is provided with a plurality of step portions for locking the operation lever 34 in the vertical direction. By locking the operation lever 34 at a predetermined step portion, the stopper arm 19 is moved to a predetermined swing angle. Can be positioned.

The stopper arm 19 and the attachment portion 28 of the connecting member 21 are connected to each other by the long hole 3 formed in the attachment portion 28.
7 has a structure in which the pin 38 on the tip side of the stopper arm 19 is inserted, and the compression spring 26 is used during normal leveling work by the central leveling member 18 and the lateral leveling member 16.
Is connected to the cylinder 22 and the inner cylinder 2 via the piston 23 on the upper side.
In order to integrally urge 7 to the upper side, the lower end edge portion of the long hole 37 elastically abuts the pin 38, and the upper end position of the connecting member 21 (cylinder 22) is positioned.

That is, by changing the height position of the pin 38 with respect to the planting work machine 4, the upper end position of the connecting member 21 is changed, and the swing angle at which the support arm 17 is positioned by the upper end position of the connecting member 21 is changed. The heights of the central leveling member 18 and the side leveling member 16 can be adjusted by swinging and positioning the operation lever 34 (locking the lever guide 36 to a predetermined step portion).

As a result, the positions of the central leveling member 18 and the lateral leveling member 16 can be easily set according to the hardness of the field by swinging the operating lever 34.
The central ground leveling member 18 and the lateral ground leveling member 16 can be housed in the planting work machine 4 side so as not to touch the field scene, and when the ground leveling work by the field leveling member is unnecessary, the central leveling member 18 can be easily performed. Also, the lateral ground leveling member 16 can be housed to perform a normal planting operation that does not require the ground leveling member.

The operating lever 34 is set to a height at which the operator can easily operate it from the driver's seat 10 of the traveling machine body. The height of the ground leveling members 16 and 18 can be easily adjusted by operating.

On the other hand, the support 39 of the central grounding member 18 includes
A guide roller 41 is rotatably supported on the upper side, and the guide roller 41 is attached to the traveling machine body 3 side during the ascent of the work machine 4 with the planting work. It is arranged so as to contact with 42.

Therefore, as shown in FIG. 6, when the planting work machine 4 is raised during turning or traveling on the road, the guide roller 41 on the side of the central grounding member 18 contacts the contact guide 42 during the raising. The support arm 17 is brought into contact with the arm 14 and the support shaft 12 integrally with each other, and is positioned at the contact position between the guide roller 41 and the contact guide 42. The rise of the attached work machine 4
The bracket 11 is allowed to rotate around the support shaft 17 that is integrally fixed to the support arm 17, and the central leveling member 18 and the side leveling member 16 are fixed in position, and only the main body of the planting work machine 4 is allowed. Continues to rise.

When only the main body of the planting work machine 4 is raised, the position of the piston 22 of the connecting member 21 is positioned by the contact between the guide roller 41 and the contact guide 42. , The pin 38 of the stopper arm 19 is inserted into the long hole 37 of the mounting portion 28.
7 slides, and after the contact between the upper edge portion of the long hole 37 and the pin 38, only the cylinder 22 is lifted by the pin 38 as shown in FIG. 3C.
The connecting member 21 extends as a whole, and the connecting member 21 serves as a flexible means to allow the planting work machine 4 to rise.

As a result, when the planting work machine 4 is raised, the central leveling member 18 and the lateral leveling member 16 are moved by the guide roller 4
1 is positioned and stored in the storage posture B at the position where the contact guide 42 contacts, and the central grounding member 18 and the lateral grounding member 16 contact the traveling machine body 3 side to damage the planting work machine 4 side, Inconveniences such as hindering the ascent are prevented, and the planting work machine 4 can be smoothly operated without removing each leveling member or moving the position of each grounding member in advance before raising the planting work machine 4. Can be raised to.

Further, the distance between the planting work machine 4 and the traveling machine body 3 can be shortened, and a short-length riding rice transplanter having a central leveling member 18 and a lateral leveling member 16 can be constructed. At the same time, the central leveling member 18 and the lateral leveling member 16 can be attached to the model having a relatively short distance between the planting work machine 4 and the traveling machine body 3 as described above.

With the structure shown above, when the planting work machine in the raised state is lowered, the tension spring 29 acts as the posture returning means to move the support arm 17 upward after the guide roller 41 is separated from the contact guide 42. When the float 7 is in contact with the ground, the central grounding member 1
When the ground leveling member 8 and the lateral grounding member 16 return to the working posture A and the ground leveling work is required, the ground leveling work can be immediately performed.

On the other hand, in the above embodiment, a rake plate is used as the central leveling member 18 and the lateral leveling member 16, but the central leveling member 1 is used as shown in FIGS.
A roller 46 may be used as 8. In this case, a blade plate 47 may be made to project from the end of the roller 46, and the blade plate 47 may be configured to mitigate mud pushing to the left and right.

Further, as shown in FIGS. 9 and 10, a car wheel 48 may be used as the central grounding member 18. In this case, the car wheel 48 crushes and suppresses the mud, so that it has a high leveling effect and does not push the mud to the left or right.

[0037]

According to the structure of the present invention configured as described above, since the ground leveling member is provided so as to reach the falling range of the lifting soil between the left and right wheels including the front of the sensing float, Lifted soil (falling soil) that has fallen on the passage of the sensing float between the wheels in the field can be leveled evenly, and the float follows the leveled field scene without being greatly affected by the falling soil. There is an effect that the accuracy of the planting depth is improved.

Further, by providing the front and rear sensing leveling members and the side leveling members, and making the lateral width of the sensing leveling member larger than the lateral width of the sensing float, the leveling of the passing portion of the sensing float is surely performed. In addition, since the front of the side float is also leveled, especially in a field with a rough top surface,
For example, even at the time of planting work on the headland of the field, each float runs on the field scene where the soil is leveled by the leveling member, and the precision of the control of the planting depth can be maintained.

At this time, mud or the like pushed by the sensing ground leveling member at the time of leveling is smoothly flowed rearward through the longitudinal gap between the sensing leveling member and the side leveling member, and the mud or the like is pushed forward. Inconveniences such as hindering the operation of the sensing float are also prevented.

On the other hand, the left and right ends of the sensing ground leveling member and the side ground leveling member are partially or wholly overlapped in a front view and a rear view, whereby a front side of a left-right gap between the sensing float and the side float is provided. Since at least one of the sensing ground leveling member and the side ground leveling member is located to level the field, the leveling member leveles the fallen soil between the sensing float and the side float, and between the sensing float and the side float. It is possible to prevent the adverse effect of the falling soil on the farm field.

By making the width between the outer ends of the left and right side leveling floats larger than the width between the outer ends of the left and right outermost side floats, about half the space between the next planting row and the row is obtained. Since the soil is leveled, the leveling property of the field is improved and the accuracy of the planting depth is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a riding rice transplanter.

FIG. 2 is a side view of a riding rice transplanter.

3A and 3B are cross-sectional views showing the structure of the connecting member, wherein FIG. 3A is a state of the connecting member during ground leveling work, and FIG. (C) shows the states of the connecting members in the storage posture.

FIG. 4 is a side view of the riding rice transplanter in which the ground leveling member has a working posture.

FIG. 5 is a side view of the riding rice transplanter in a state where the ground leveling member is retracted due to contact with the stone.

FIG. 6 is a side view of the riding rice transplanter in which the ground leveling member is in the storage posture.

FIG. 7 is a plan view of a riding rice transplanter in which the ground leveling member has a roller shape.

FIG. 8 is a side view of the riding rice transplanter in which the ground leveling member has a roller shape.

FIG. 9 is a plan view of the riding rice transplanter in which the ground leveling member has a cage wheel shape.

FIG. 10 is a side view of the riding rice transplanter in which the ground leveling member has a cage wheel shape.

[Explanation of symbols]

1 front wheel (wheel) 2 rear wheels 3 traveling aircraft 4 Working machine (planting machine) 7 floats 7C center float (sensing float) 7S side float 16 lateral grounding members 18 Central leveling member (sensing leveling member) Left and right width of L1 center float Left and right width of L2 sensing ground leveling member L5 The width between the outer ends of the left and right outermost side floats L6 Width between the outer edges of the left and right lateral grounding members

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takehisa Hamada             Shimane Prefecture Yatsuka-gun Higashi Izumo-cho Ojiyacho 667             1 Mitsubishi agricultural machinery Co., Ltd. F term (reference) 2B034 BB01 BC06 BE01 BE03 EA02                       JA17 JA24                 2B063 AA06 AB01 AB08 BB01 BB21                       BB28 BB44

Claims (4)

[Claims] 1. A transplant working machine (4) is vertically movably connected to a traveling machine body (3) supported by wheels (1) and (2), and the transplant working machine (4) follows a field scene. A plurality of grounded floats (7) are swingably provided so that the planting depth is maintained based on the swing of the sensing float (7C) on the center side of the planting work machine (4) along the field scene. A sensing and leveling member (18) for leveling the field scene in front of the sensing float (7C) is provided with an elevation adjusting mechanism for adjusting the height of the transplant work machine.
In the transplanter provided with the above, the sensing ground leveling member (18)
The ground leveling member in the transplanter that is provided so as to reach the falling range of the lifting soil between the left and right wheels including the front of the sensing float (7C). 2. A lateral grounding member (16) in front of the side float (7S) located laterally of the sensing float (7C).
Is provided to sense the lateral ground leveling member (16).
8) Being offset to the rear position, the sensing ground leveling member (1
8. The ground leveling member for a transplanter according to claim 1, wherein the lateral width (L2) of 8) is larger than the lateral width (L1) of the sensing float (7C). 3. The ground leveling member for a transplanter according to claim 2, wherein both the left and right ends of the sensing ground leveling member (18) and the side ground leveling member (16) are partially or wholly overlapped in a front view and a rear view. 4. The width (L6) between the outer ends of the left and right lateral grounding members (16) is set to the outermost side floats (7) on the left and right.
The ground leveling member for a transplanter according to claim 2 or 3, wherein the width (L5) between the outer ends of (S) is larger.