JP5276545B2 - Paddy field work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the workability of a work for forming furrows on the surface of a paddy field, in a paddy field working vehicle. <P>SOLUTION: A work implement is disposed behind a machine frame, and a land-leveling device 37 is disposed between the work implement and the machine frame. The land-leveling device 37 includes a laterally disposed driving shaft 94 to be rotatingly driven, and land-leveling members 98 and furrow-forming members 99 integrally and rotatably attached to the driving shaft 94. Wedge-like portions 99b each having a wedge-like cross-section whose lateral width in the longitudinal direction of the driving shaft 94 is reduced toward the outer part in the radical direction are disposed in each of the furrow-forming members 99. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a paddy field vehicle equipped with a working device such as a seedling planting device or a direct sowing device at the rear of the machine body.

  In a riding type rice transplanter that is an example of a paddy field work vehicle, as disclosed in Patent Document 1, a seedling planting device (4 in FIGS. 1, 2, and 4 of Patent Document 1) (corresponding to a work device) ), And a ground leveling device (40 in FIGS. 1, 2, and 4 of Patent Document 1) is provided between the seedling planting device and the machine body as in Patent Document 1. In this way, in a riding type direct sowing machine provided with a direct sowing device at the rear part of the aircraft, instead of a riding type rice transplanter provided with a seedling planting device at the rear part of the aircraft, as in Patent Document 1 Some of them are equipped with a leveling device.

  In Patent Document 1, the leveling device includes a drive shaft (46 in FIG. 2 and FIG. 4 in Patent Document 1) arranged in the left-right direction and rotationally driven, and a leveling member attached to the drive shaft (FIG. 2 in Patent Document 1). , 4, 8 55). Thereby, as the aircraft advances, the leveling of the surface is performed by the leveling member that is driven to rotate, and seedlings are planted and seed pods are supplied to the leveled surface.

JP 2006-304647 A

When seedlings are planted on the surface where a lot of water is floating, or when seed pods are supplied to the surface, work to form grooves in the surface to promote drainage of the subsequent surface May be performed.
An object of this invention is to improve the workability | operativity of the operation | work which forms a groove | channel in a rice field.

[I]
(Constitution)
The first feature of the present invention is that the paddy field vehicle is configured as follows.
A work device is provided at the rear of the machine body, and a ground leveling device is provided between the work device and the machine body,
A drive shaft that is disposed in the left-right direction and is rotationally driven, a leveling member that is rotatably attached to the drive shaft, and a groove forming member that is rotatably attached to the drive shaft. Configure and prepare
A wedge-shaped portion having a wedge-shaped cross section in which the lateral width in the longitudinal direction of the drive shaft becomes narrower toward the outer side in the radial direction is provided in the groove forming member,
When the drive shaft is rotationally driven, the leveling member is rotationally driven to level the surface, and the groove forming member is rotationally driven to form a groove on the surface .
A mudguard member is provided behind the leveling member, and the mudguard member is provided so that the groove forming member is positioned in front of the adjacent mudguard members with a predetermined interval.

(Function)
[I] -1
According to the first feature of the present invention, when the leveling device is provided between the working device at the rear of the machine body and the machine body, the leveling member and the groove forming member are attached so as to be rotatable together with the drive shaft. Thereby, as the aircraft advances, the surface of the field is leveled by the leveling member that is rotationally driven, and at the same time, the groove forming member is rotationally driven, and the groove is formed on the surface by the groove forming member. It is possible to simultaneously perform the leveling of the surface of the surface and the formation of the groove of the surface by the groove forming member.

  According to the first feature of the present invention, when the groove is formed on the surface by the groove forming member as the airframe progresses, the wedge-shaped portion of the groove forming member faces the traveling direction of the airframe. In the wedge-shaped portion, a state in which the mud on the surface of the surface smoothly flows from side to side is obtained, and a groove is formed on the surface of the surface by the groove forming member without receiving the resistance of the mud on the surface.

[I] -2
According to the first feature of the present invention, the groove forming member is attached to the drive shaft of the leveling device, which may be called an existing member, and the drive shaft of the leveling device, which may be called the existing member, serves as the support member of the groove forming member. It will be combined.
Thereby, compared with the structure which supports a groove formation member via a dedicated support member in a position different from the leveling device, the support member for the groove formation member can be omitted in the first feature of the present invention.

[I] -3
When a groove is formed on the surface by the groove forming member as the aircraft progresses, for example, when a groove having a rectangular cross section is formed on the surface, the vertical wall portion of the groove stands upright in the vertical direction. The pressure of the outside mud is applied to the vertical wall portion of the groove as it is, and the vertical wall portion of the groove tends to collapse inward.

According to the first aspect of the present invention, the groove forming member includes a wedge-shaped portion having a wedge-shaped cross section in which the lateral width in the longitudinal direction of the drive shaft becomes narrower toward the outer side in the radial direction. As a result, a groove having a V-shaped cross section is formed on the surface by the groove forming member, and the vertical wall portion of the groove is inclined (by the V-shaped cross section). The vertical wall of the groove is slanted (the mud pressure outside the groove is less likely to be applied to the vertical wall of the groove as it is), and the vertical wall of the groove is difficult to collapse inward. .
[I] -4
When the surface is leveled by a leveling member that is rotationally driven as the aircraft progresses, mud is splashed backward from the leveling member, so that the mud that has been splashed adheres to the work device and does not stay. Thus, it is necessary to provide a mudguard member behind the leveling member. It is preferable that the mudguard member is disposed from the upper side to a position close to the rice field from the viewpoint of suppressing the splash of mud from the leveling member to the rear.
According to the first feature of the present invention, the mudguard member is provided behind the leveling member, and the mudguard member can suppress mud splashing from the leveling member to the rear.
[I] -5
When a groove is formed on the surface by the groove forming member as the aircraft progresses, if the mudguard member is provided behind the groove forming member in the same manner as the leveling member, the mudguard member comes into contact with the surface. For example, it is conceivable that the groove is backfilled by the mudguard member.
According to the first feature of the present invention, when the mudguard member is provided at the rear of the leveling member, the groove forming member is positioned in front of the adjacent mudguard members with a predetermined interval, and behind the groove forming member. There is no mudguard. Thereby, after a groove | channel is formed by the groove | channel formation member with advancing of a body, the state where a groove | channel is backfilled by a mudguard member does not arise.
If the mudguard member is not provided behind the groove forming member as in the first feature of the present invention, the outer diameter of the groove forming member is larger than the outer diameter of the leveling member as described in [II] below. When the diameter is set, the mudguard member can be placed close to the leveling member regardless of the groove forming member.

(Effect of the invention)
According to the first feature of the present invention, in the paddy work vehicle, as the machine body advances, it is possible to simultaneously perform the leveling of the field surface by the leveling member and the formation of the field surface groove by the groove forming member. And improving the work performance of paddy work vehicles by eliminating the need to form the groove on the paddy surface separately and the fact that the groove is formed on the paddy surface by the groove forming member without receiving mud resistance on the paddy surface I was able to.
According to the first feature of the present invention, the support member for the groove forming member can be omitted, which is advantageous in terms of simplification of the structure and weight reduction.

According to the first feature of the present invention, by forming a groove having a V-shaped cross section with a vertical wall portion that is hard to collapse on the inside, the vertical wall portion of the groove is difficult to collapse on the inside, and the time for which the groove is maintained Can be made longer (the life of the groove can be made longer), and the time for promoting the drainage function of the paddy surface can be extended. .
According to the first feature of the present invention, when the mudguard member is provided behind the leveling member, the groove is prevented from being refilled by the mudguard member after the groove is formed on the surface by the groove forming member as the airframe advances. Thus, it was possible to improve the work performance (groove formation performance) of the paddy field work vehicle while suppressing the splash of mud from the leveling member to the rear by the mudguard member.
According to the first feature of the present invention, when the outer diameter of the groove forming member is set to be larger than the outer diameter of the leveling member, the mudguard member can be arranged close to the leveling member regardless of the groove forming member. Therefore, by arranging the mudguard member close to the leveling member, the mudguard member can sufficiently exhibit the function of suppressing the splash of mud from the leveling member to the rear.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the paddy field work vehicle of the first feature of the present invention.
A pair of lateral surfaces arranged along the longitudinal direction of the drive shaft at a predetermined interval and perpendicular to the drive shaft, and a radial direction so as to approach each other from the radially outer ends of the pair of lateral surfaces A pair of inclined surface portions extending obliquely on the outside, and constituting the groove forming member,
The pair of inclined surface portions as the wedge-shaped portion,
The outer diameter of the groove forming member is set to be larger than the outer diameter of the leveling member.

(Function)
According to the second feature of the present invention, since the outer diameter of the groove forming member is set to be larger than the outer diameter of the leveling member, the groove forming member enters a position deeper than the field where the leveling member levels. Thus, the groove is reliably formed on the surface by the groove forming member.

  As described above, when the outer diameter of the groove forming member is set to be larger than the outer diameter of the leveling member, if the wedge-shaped portion is formed from the drive shaft portion in the groove forming member, the leveling member and the groove An oblique space is formed between the forming member (the wedge-shaped portion). In such a state, the mud on the surface enters between the leveling member and the groove forming member (wedge-shaped portion), and the mud on the surface of the surface becomes lump between the leveling member and the groove forming member (wedge-shaped portion). It can be considered that it stays.

According to the second feature of the present invention, for example, as shown in FIG. 18, a pair of lateral surface portions 99a arranged along the longitudinal direction of the drive shaft 94 at a predetermined interval and orthogonal to the drive shaft 94, and a pair of And a pair of inclined surface portions 99b extending obliquely outward in the radial direction so as to approach each other from the radially outer end of the lateral surface portion 99a, constituting a groove forming member 99, and a pair of inclined surface portions 99b is a wedge-shaped portion 99b.
Thereby, when setting the outer diameter D3 of the groove forming member 99 to be larger than the outer diameter D2 of the leveling member 98, for example, as shown in FIG. 18, the leveling member 98 and the groove forming member 99 (lateral surface portion 99a). To avoid contact with the ground leveling member 98 and the groove forming member 99 (the lateral surface portion 99a) so that the mud on the surface enters and stays as a lump. it can. A groove having a V-shaped cross section is formed on the surface by the inclined surface portion 99b (wedge-shaped portion 99b) located outside the lateral surface portion 99a of the groove forming member 99.

(Effect of the invention)
According to the second feature of the present invention, the groove can be surely formed by the groove forming member, and the mud on the surface enters between the leveling member and the groove forming member (lateral surface portion). As a result, the work performance (groove formation performance) of paddy field work vehicles could be improved.

[III]
(Constitution)
The third feature of the present invention is that the water field work vehicle constructed as follows.
A work device is provided at the rear of the machine body, and a ground leveling device is provided between the work device and the machine body,
A drive shaft that is disposed in the left-right direction and is rotationally driven, a leveling member that is rotatably attached to the drive shaft, and a groove forming member that is rotatably attached to the drive shaft. Configure and prepare
When the drive shaft is rotationally driven, the leveling member is rotationally driven to level the surface, and the groove forming member is rotationally driven to form a groove on the surface.
A mudguard member is provided behind the leveling member, and the mudguard member is provided so that the groove forming member is positioned in front of the adjacent mudguard members with a predetermined interval therebetween.

(Function)
[III] -1
According to the third feature of the present invention, when a leveling device is provided between the working device at the rear of the machine body and the machine body, the leveling member and the groove forming member are attached so as to be rotatable together with the drive shaft. Thereby, as the aircraft advances, the surface of the field is leveled by the leveling member that is rotationally driven, and at the same time, the groove forming member is rotationally driven, and the groove is formed on the surface by the groove forming member. It is possible to simultaneously perform the leveling of the surface of the surface and the formation of the groove of the surface by the groove forming member.
[III] -2
According to the third feature of the present invention, the groove forming member is attached to the drive shaft of the leveling device, which may be referred to as an existing member, and the drive shaft of the leveling device, which may be referred to as the existing member, is the support member of the groove forming member. It will be combined.
Thereby, compared with the structure which supports a groove formation member via a dedicated support member in a position different from the leveling device, the support member for the groove formation member can be omitted in the first feature of the present invention.
[III] -3
When the surface is leveled by a leveling member that is rotationally driven as the aircraft progresses, mud is splashed backward from the leveling member, so that the mud that has been splashed adheres to the work device and does not stay. Thus, it is necessary to provide a mudguard member behind the leveling member. It is preferable that the mudguard member is disposed from the upper side to a position close to the rice field from the viewpoint of suppressing the splash of mud from the leveling member to the rear.
According to the third feature of the present invention, the mudguard member is provided behind the leveling member, and the mudguard member can suppress the splashing of mud from the leveling member to the rear.

[III] -4
When a groove is formed on the surface by the groove forming member as the aircraft progresses, if the mudguard member is provided behind the groove forming member in the same manner as the leveling member, the mudguard member comes into contact with the surface. For example, it is conceivable that the groove is backfilled by the mudguard member.
According to the third aspect of the present invention, when the mudguard member is provided behind the leveling member, the groove forming member is positioned in front of the adjacent mudguard members with a predetermined interval, and behind the groove forming member. There is no mudguard. Thereby, after a groove | channel is formed by the groove | channel formation member with advancing of a body, the state where a groove | channel is backfilled by a mudguard member does not arise.
If the mudguard member is not provided behind the groove forming member as in the third feature of the present invention, the outer diameter of the groove forming member is larger than the outer diameter of the leveling member as described in [II] above. When set to, the mudguard member can be placed close to the leveling member regardless of the groove forming member.

(Effect of the invention)
According to the third feature of the present invention, as the body of the paddy field work vehicle progresses, the leveling of the field surface by the leveling member and the formation of the field surface by the groove forming member can be performed simultaneously. The paddy work vehicle can be improved in performance because it is not necessary to separately form the grooves on the paddy field.
According to the third feature of the present invention, the support member for the groove forming member can be omitted, which is advantageous in terms of simplification of the structure and weight reduction.
According to the third aspect of the present invention, when the mudguard member is provided behind the leveling member, the groove is prevented from being refilled by the mudguard member after the groove is formed on the surface by the groove forming member as the aircraft progresses. Thus, it was possible to improve the work performance (groove formation performance) of the paddy field work vehicle while suppressing the splash of mud from the leveling member to the rear by the mudguard member.

  According to the third feature of the present invention, when the outer diameter of the groove forming member is set to be larger than the outer diameter of the leveling member, the mudguard member can be arranged close to the leveling member regardless of the groove forming member. Therefore, by arranging the mudguard member close to the leveling member, the mudguard member can sufficiently exhibit the function of suppressing the splash of mud from the leveling member to the rear.

[IV]
(Constitution)
According to a fourth aspect of the present invention, any one of the paddy field work vehicles according to the first to third aspects of the present invention is configured as follows.
The groove forming member is configured to be located at a position deviated in the left-right direction from the rear of the rear wheel that supports the airframe.

(Function)
According to the fourth feature of the present invention, since the groove forming member is located at a position deviated from the rear of the rear wheel in the left-right direction, the groove is formed even if the outer diameter of the groove forming member becomes relatively large. The member does not interfere with the rear wheel. As a result, in order to avoid interference between the groove forming member and the rear wheel, it is not necessary to support the leveling device at a position far away from the machine body, and the leveling device can be arranged close to the rear wheel. Accordingly, the work device can be supported by being brought close to the machine body.

(Effect of the invention)
According to the fourth feature of the present invention, the work device can be supported close to the machine body, and the total length of the paddy field work vehicle including the work device can be suppressed. Overall compactness was achieved.

It is a whole side view of a riding type direct seeding machine. It is a whole top view of a riding type direct seeding machine. It is a side view of a fertilizer application (hopper and feeding part). It is a side view of a direct sowing apparatus and a leveling apparatus. It is a rear view of a fertilizer applicator (a hopper and a feeding part). It is a rear view of a direct seeding apparatus. It is a cross-sectional plan view of the vicinity of the feeding part of the direct seeding device. It is a cross-sectional plan view of the vicinity of the seed sowing groove device of the direct sowing apparatus. It is a top view which shows the outline of the drawing | feeding-out part of a direct sowing apparatus and the 1st-4th direct sowing clutch, the outline | summary of the feeding part of a fertilizer application, and the 1st-4th fertilization clutch. It is a side view of the vicinity of a center float. It is a disassembled perspective view which shows the support structure of a center float. It is a side view of the vicinity of a side float. It is a side view of the vicinity of a side float. It is a side view which shows the support structure of a side float. It is a disassembled perspective view which shows the support structure of a side float. It is a rear view of a leveling device. It is a rear view of the left side part of a leveling device. It is a cross-sectional plan view of the left side portion of the leveling device. It is a cross-sectional top view of the vicinity of the transmission case which transmits motive power to the delivery part and direct leveling apparatus of a direct seeding apparatus. It is a perspective view of a leveling member. It is a figure which shows the cooperation state of a control apparatus and each part. It is a perspective view of the leveling member in 1st another form of implementation of invention. It is a top view of the groove formation member in the 2nd another form of implementation of an invention, a center float, and a side float. It is a top view of the leveling apparatus, center float, and side float in 3rd another form of implementation of invention.

[1]
As shown in FIGS. 1 and 2, a link mechanism 3 is supported so as to be movable up and down at the rear of the machine body supported by the right and left front wheels 1 and the right and left rear wheels 2, and the link mechanism 3 is operated up and down. A hydraulic cylinder 4 is provided, and a direct sowing device 5 (corresponding to a working device) is supported by the link mechanism 3 to constitute a riding type direct sowing machine that is an example of a paddy field work vehicle. The leveling device 37 is supported by the direct sowing device 5, the leveling device 37 is provided between the machine body and the direct seeding device 5, and the fertilizer application device 20 is supported at the rear of the machine body.

  As shown in FIGS. 1 and 3, right and left aircraft frames 28 are arranged in the front-rear direction, and vertical wall-like right and left support plates 29 are connected to the rear portions of the right and left aircraft frames 28. Yes. The link mechanism 3 includes a single top link 3a, two lower links 3b, a top link 3a, and a vertical link 3c connected across the rear portion of the lower link 3b. The top link 3a of the link mechanism 3 and the hydraulic cylinder 4 are supported by the right and left support plates 29 so as to be able to swing up and down, and the lower link 3b of the link mechanism 3 swings up and down at the rear of the right and left body frames 28. It is supported freely.

Next, the outline | summary of the direct seeding apparatus 5 is demonstrated.
As shown in FIGS. 1, 2, and 6, the direct sowing apparatus 5 includes four hoppers 6 corresponding to two strips for storing seed potatoes, four feeding portions 7 corresponding to two strips, and one blower 8. In addition, one center float 9 corresponding to two strips, two side floats 10 corresponding to two strips, and two side floats 11 corresponding to one strip are arranged in the left-right direction. Eight seed grooving grooves 12 arranged at predetermined intervals in the left-right direction are provided, and a hose 13 is connected across the feeding portion 7 and the seed grooving groove 12.

  As shown in FIGS. 1, 2, and 6, right and left markers 22 are provided on the right and left portions of the direct seeding device 5, and an action posture that touches the field G to form an index, and above the field G It is configured to be operated in a retracted storage position (see FIGS. 1, 2 and 6). The right and left markers 22 are configured to include an arm portion 22a supported by the direct seeding device 5 so as to be swingable up and down, and a rotating body 22b supported freely at the tip of the arm portion 22a. An electric motor 23 is provided for operating the right and left markers 22 to the working posture and the retracted posture.

[2]
Next, the fertilizer application device 20 will be described.
As shown in FIGS. 1, 2, and 3, support frames 30 and 33 are connected to the right and left support plates 29, and rear steps 34 (four hoppers to be described later) supported by the right and left support plates 29. The support frames 30 and 33 are located above a width (or a width that is substantially the same) that is slightly larger than the total width of 14.

  As shown in FIGS. 1, 3, and 5, a horizontal frame 31 facing in the left-right direction is rotatably supported around the horizontal axis P <b> 1 at the upper end of the support frame 30, and the four feeding portions 15 in two-row units are supported. Are connected to the horizontal frame 31, the four hoppers 14 storing powdered fertilizer are connected to the upper part of the feeding portion 15, and the four hoppers 14 are connected to each other. A frame 35 connected to the horizontal frame 31 extends forward, the intermediate portion of the hopper 14 is supported by the frame 35, and the frame 35 is connected to the support frame 33 via the buckle mechanism 36. Thereby, the hopper 14 and the feeding part 15 are provided in the rear part of the fuselage (on the rear side of the driver seat 21 and above the rear step 34).

As shown in FIGS. 1, 3, and 5, a blower 16 is provided between the right and left support plates 29 on the lower side of the driver seat 21, and a duct 32 extending bifurcated from the blower 16 is extended. Connected to the unit 15. As shown in FIGS. 4, 6, and 8, two fertilizer grooves 17 are disposed on the center float 9, two fertilizer grooves 17 are disposed on the side float 10, and one fertilizer groover 17 is disposed on the side float 11. Is provided. As shown in FIGS. 2, 4, and 5, flexible hoses 18 and 19 are connected across the feeding portion 15 and the fertilizer groover 17, and the intermediate pipe connecting the hoses 18 and 19 is connected. 130 (made of hard resin) is connected to and supported by the vertical frames 25 and 26 (see FIGS. 4 and 6 [3] described later).
As described above, the fertilizer application device 20 is constituted by the hopper 14, the feeding portion 15, the blower 16, the duct 32, the fertilizer groover 17, the hoses 18, 19 and the like.

  As shown in FIG. 3, the feeding portion 15 has a two-part structure of an upper portion 15 a connected to the hopper 14 and a lower portion 15 b connected to the hose 18 and the duct 32. The upper portion 15a is connected to the side portion 15b so as to be swingable upward (openable and closable) around the horizontal axis in the vicinity of the horizontal axis P1, and the upper and lower portions of the feeding portion 15 are connected by the connecting member 15c. 15a and 15b are closed and connected.

  As shown in FIG. 3, by removing the connecting member 15 c of the feeding portion 15 and releasing the buckle mechanism 36 (by removing), the hopper 14 and the feeding portion are left with the lower portion 15 b of the feeding portion 15 left. The upper portion 15a, the horizontal frame 31, and the frame 35 of the portion 15 can be lifted rearward and upward around the horizontal axis P1 from the state shown in FIG. Thereby, the maintenance work inside the feeding part 15 and the maintenance work in the vicinity of the lower part 15b of the feeding part 15, the duct 32 and the rear step 34 can be easily performed.

[3]
Next, the overall structure and support structure of the direct seeding device 5 will be described.
As shown in FIGS. 4, 6, 7, and 8, a square-pipe-shaped support frame 24 facing in the left-right direction is provided, and two vertical frames 25 are connected near the center of the left and right of the support frame 24. Two vertical frames 26 are connected to the right and left portions, and a horizontal frame 27 facing in the left-right direction is connected to the upper and lower intermediate portions of the vertical frames 25 and 26.

  As shown in FIGS. 4, 6, 7, and 8, a horizontal frame 38 that faces in the left-right direction is connected to the upper part of the vertical frames 25 and 26, and a horizontal frame 39 that faces forward is connected to the upper part of the vertical frame 26. Yes. A horizontal frame 40 facing in the left-right direction is connected across the front portion of the horizontal frame 39, and a horizontal frame 41 facing in the front-rear direction is connected across the horizontal frames 38, 40.

  As shown in FIGS. 4, 6, 8, and 17, a horizontal frame 42 that extends in the left-right direction is connected to the lower portion of the vertical frame 25, and a vertical frame 43 is connected to the horizontal frame 42 and the support frame 24. A rolling boss 44 is connected through the support frame 24 and the vertical frame 43. A support shaft (not shown) facing in the front-rear direction is provided at a lower portion of the vertical link 3c of the link mechanism 3, and a boss portion 44 is externally fitted to the support shaft of the link mechanism 3 so as to be rotatable (rollable). .

  As shown in FIGS. 4, 6, and 7, the vertical frame 89 is connected to the horizontal frame 39 and extends upward from the front. A hook 89a connected to the vertical frame 89 extends to the right and left (outward), and a connection portion 89b connected to the vertical frame 89 extends toward the left and right center of the hopper 6. Yes. As shown in FIGS. 6 and 7, an arm 39a is connected to the right horizontal frame 39 and extends rightward (outward). An arm 26a is connected to the left vertical frame 26, and the lower side of the blower 8 and the electric motor 45 is extended leftward (outward).

  As a result, the entire direct seeding device 5 is supported on the support frame 24 and the like, and the direct seeding device 5 is supported around the front and rear axis P2 of the support shaft (boss portion 44) of the link mechanism 3 so as to be freely rollable. The link mechanism 3 is supported so as to be movable up and down. The direct seeding device 5 (boss portion 44) is configured to be removable from the support shaft of the link mechanism 3. When the direct seeding device 5 is removed, the boss portion 24a connected to the support frame 24 (FIGS. 6 and 6). 7) and a stand (not shown) can be attached to allow the direct sowing apparatus 5 to be self-supporting.

[4]
Next, the support structure for the feeding unit 7 and the hopper 6 in the direct seeding device 5 will be described.
As shown in FIGS. 4, 6, and 7, the feeding portion 7 is connected to the horizontal frames 38 and 40 so as to be positioned between the horizontal frames 38 and 40, and the four hoppers 6 that store seed soot are fed out. The four hoppers 6 are connected to each other by being connected to the upper portion of the portion 7. In this case, as shown in FIG. 2, the overall width of the four hoppers 6 is substantially the same as the overall width of the four hoppers 14. The right and left end portions of the four hoppers 14 and the entire right and left end portions of the four hoppers 14 are located at substantially the same position (when viewed from the front-rear direction, the entire right and left end portions of the four hoppers 6 The entire right and left end portions of the four hoppers 14 are located at substantially the same position).

  As shown in FIG. 6, the total width of the four hoppers 6 and the total width of the four hoppers 14 are narrower than the distance between the seed-groove groove 12 at the right end and the seed-groove groove 12 at the left end. It has become. In other words, the right end of the whole of the four hoppers 6 and 14 is located on the left and right center side of the seed grooving groove 12 at the right end, and the left end of the whole of the four hoppers 6 and 14 is It is located on the left and right center side with respect to the seed crop groover 12 at the left end.

  As shown in FIGS. 4, 6, and 7, the blower 8 is connected to the left vertical frame 26, and the rotation axis of a rotary blade (not shown) inside the blower 8 is in a state of being directed in the longitudinal direction of the machine body. An electric motor 45 for driving the blower 8 is connected to the front portion of the blower 8, and an intake cover 46 having a downward intake port 46 a is connected to the rear portion of the blower 8. A duct 47 is extended from the blower 8, and the duct 47 is connected to the feeding portion 7, and the hose 13 is connected across the feeding portion 7 and the seed soaking groove 12.

As shown in FIGS. 6 and 7, when the right and left markers 22 are operated to the retracted posture, the right and left markers 22 can be held in the retracted posture by hanging them on the hooks 89 a of the vertical frame 89. .
When the left marker 22 is hooked on the hook 89a of the vertical frame 89 and held in the retracted position, the left marker 22 (arm portion 22a) is positioned on the left side of the electric motor 45 on the front side of the blower 8, as shown in FIG. Thus, in the rear view (front view), the left marker 22 (arm portion 22a) overlaps the blower 8. In the left marker 22, the electric motor 23 is positioned below the blower 8 and the electric motor 45, and is positioned between the left vertical frame 26 and the left marker 22 (arm portion 22a) in the retracted position. In the right marker 22, the electric motor 23 is located between the right vertical frame 26 and the right marker 22 (arm portion 22a) in the retracted position.

[5]
Next, the support structure of the center float 9 and the side floats 10 and 11 in the direct seeding device 5 will be described.
As shown in FIGS. 4, 6, 7, and 8, five support frames 48 are connected to the lower portion of the support frame 24 and extend rearward, and a bracket 48 a connected to the rear end portion of the support frame 48. Is extended downward.

  As shown in FIGS. 8, 10, and 11, the center float 9 is formed of a synthetic resin by blow molding, and a U-shaped metal support bracket 82 is connected to the rear portion of the center float 9 in a front view. . The support pin 77 faces the left-right direction, and is inserted and attached across the bracket 48 a and the support bracket 82 of the support frame 48. An arm 79 bent in a crank shape in plan view is supported around the support pin 77 so as to be swingable up and down and extends forward, and is L-shaped in front view connected to the front portion of the center float 9. The bracket 9 a and the front portion of the arm 79 are connected by a bolt 122. Thereby, the center float 9 and the arm 79 are supported around the support pin 77 so as to be swingable up and down.

  As shown in FIGS. 10 and 11, a frame 49 is connected to a portion of the support frame 24 located above the center float 9 and extends rearward, and a height sensor 78 composed of a potentiometer is provided in the frame. 49 is attached. A rod 80 is connected across the detection arm 78 a of the height sensor 78 and the end of the arm 79, and a spring 81 that biases the detection arm 78 a of the height sensor 78 downward is attached. The front part of the float 9 is urged downward.

As shown in FIGS. 8 and 15, the side floats 10 and 11 are made of synthetic resin by blow molding, and a U-shaped metal support bracket 83 is connected to the rear part of the side floats 10 and 11 in front view. Has been. As shown in FIGS. 12, 13, 14, and 15, the support pin 77 is inserted in the left-right direction and is inserted and attached across the bracket 48 a and the support bracket 83 of the support frame 48. An arm 83 a extends upward from the support bracket 83, a notch 83 b is formed at the end of the arm 83 a, and a pin 48 b connected to the support bracket 48 a of the support frame 48 is notched in the support bracket 83. It has entered the part 83b.
Accordingly, as shown in FIGS. 12, 13, and 14, the side floats 10 and 11 are supported so as to be swingable up and down around the support pin 77, and the vertical swing range of the side floats 10 and 11 is the support bracket. It is restricted to the range of 83 notch 83b.

[6]
Next, the seed vat and fertilizer groover 12 and 17 will be described.
As shown in FIGS. 8 and 10 to 13, the groove member 84 having a triangular shape in a side view and a tapered shape in a plan view (wedge shape) is provided on the left and right center sides (support brackets) of the center float 9 (side floats 10 and 11). 83 and a portion close to 83, and protrudes downward from the bottom surface of the center float 9 (side floats 10 and 11).

  As shown in FIGS. 8 and 10 to 13, the fertilizer groover 17 formed in a U shape in plan view is connected to the rear portion of the groove member 84, and a cylindrical connection member 85 made of rubber and bellows is provided. The hose 19 is inserted into the connecting member 85 by being attached to the upper part of the fertilizer groover 17. The lateral width of the rear portion of the grooving member 84 and the lateral width of the fertilizer groover 17 are substantially the same, and the lower end portion of the rear portion of the grooving member 84 and the lower end portion of the fertilizer groover 17 are substantially at the same position. positioned. As shown in FIGS. 10, 12, and 13, the fertilizer groover 17 is disposed at a position overlapping the support pin 77 (position near the support pin 77) in a side view.

  As shown in FIGS. 8 and 10 to 13, an angle material support frame 86 is connected to the rear portion of the support bracket 83, and the support frame 86 passes over the fertilizer groover 17 and the groove cutting member 84 and the center float 9 (side It extends outside the floats 10, 11). Grooving members 87 having a triangular shape in a side view and a tapered shape (wedge shape) in a plan view are connected to the right and left ends of the support frame 86. A seed-grooving groove device 12 formed in a U shape in plan view is connected to the rear portion of the grooving member 87, and a rubber-made bellows cylindrical connection member 85 is attached to the upper portion of the seed-growing groove device 12. The hose 13 is inserted into the connecting member 85.

  As shown in FIGS. 7, 10, 12, and 13, a round bar-like support frame 135 is connected to the support frame 86 in the vertical direction, and the support frame 136 is connected to the upper end of the support frame 135 in the front-rear direction. The front end portion of the support frame 136 is formed in an arc shape, and the upper end of the connection member 85 (fertilizer groover 17) and the lower portion of the hose 19 are held by the front end portion of the support frame 136, and the rear end of the support frame 136 The part is formed in an arc shape, and the upper end of the connection member 85 (seed producing groove device 12) and the lower part of the hose 13 are held by the rear end portion of the support frame 136.

  As a result, as shown in FIGS. 8 and 10 to 13, the seed grooving device 12 is placed on the portion of the center float 9 (side floats 10 and 11) that is separated from the fertilizer grooving device 17 through the support frame 86. It is in a state of being attached, and the seed vat groove grooving device 12 is disposed from the rear of the fertilizer grooving device 17 to the outside (one in the left-right direction) of the center float 9 (side floats 10, 11). .

  As shown in FIGS. 8 and 10 to 13, the lateral width of the seed-growing groover 12 and the lateral width of the fertilizer groover 17 are substantially the same, and the width of the grooving member 87 is larger than the lateral width of the seed-growing groover 12. The width at the rear is large. The lower end portion of the seed grooving groove 12 and the lower end portion of the rear portion of the grooving member 87 are located slightly below the bottom surface of the center float 9 (side floats 10 and 11), and the lower end portion of the rear portion of the grooving member 87 is The lower end of the grooving member 84 and the lower end of the fertilizer grooving device 17 are located slightly lower than the lower end of the seed grooving device 12, and lower than the lower end of the rear of the grooving member 87. Located below. Thereby, the depth in which the lower end part of the seed grooving machine 12 rushes into the surface G is in a relatively shallow state.

  As shown in FIGS. 8 and 10 to 13, a soil covering member 88 is connected from the fertilizer groover 17 to the left and right center side (portion close to the support bracket 83) of the center float 9 (side floats 10 and 11). The soil covering member 88 is formed by bending a plate material. The soil covering member 88 extends diagonally rearward to the right and left from the center float 9 (side floats 10 and 11), and the tip of the soil covering member 88 is behind the fertilizer groover 17. Is located. Thereby, as shown in FIG. 8, the soil covering member 88 is located on the opposite side of the fertilizer groover 17 from the rear side of the fertilizer groover 17 in the left-right direction.

  As shown in FIGS. 8 and 10 to 13, the fertilizer is supplied from the fertilizer groover 17 to the groove while the fertilizer groover 17 forms a groove on the surface G as the aircraft progresses. While the groove culverter 12 forms a relatively shallow groove on the surface G, the seed culm is supplied to the relatively shallow groove from the seed cultivator 12 (surface sowing state). As the aircraft progresses, the soil covering member 88 pushes mud toward the groove formed on the field surface G by the fertilizer groover 17, and the seed fertilizer groove toward the groove formed on the field surface G by the fertilizer groover 17. The vessel 12 pushes the mud, and the fertilizer is buried in the field G by the mud pushed by the seed groat 12 and the soil covering member 88.

  As shown in FIGS. 8 and 10 to 13, since the seed pod is supplied to the relatively shallow groove formed on the surface G from the seed grower 12 (because it is in a surface sowing state), sowing accuracy (field G It is not necessary to consider so much the depth of the seed soot, and the amount of water on the surface G (water tension) is easy to manage, and the missing grains (seeds are supplied to the surface G). The part that is not) can also be found easily. This makes it possible to adapt to various working conditions (types of seed pods, state of rice field G, etc.). By supplying fertilizer to rice field G, the germination rate of seed potatoes and the growth of seedlings are promoted. Can be planned.

[7]
Next, the transmission structure to the direct sowing apparatus 5 (feeding part 7) and the fertilizer applying apparatus 20 (feeding part 15) will be described.
As shown in FIG. 1, the power of an engine 50 mounted on the front part of the airframe is transmitted via a transmission belt (not shown) to a hydrostatic continuously variable transmission (not shown) and a transmission on the front part of the airframe. It is transmitted to the case 51 and transmitted from the auxiliary transmission (not shown) of the transmission case 51 to the right and left front wheels 1. The power of the auxiliary transmission (not shown) of the transmission case 51 is transmitted to the right and left rear wheels 2 via the transmission shaft 52.

  As shown in FIGS. 1 and 21, the power of an auxiliary transmission (not shown) of the transmission case 51 is transmitted to the feeding portion 7 via the first work clutch 53 and the transmission shaft 55. The power of the auxiliary transmission (not shown) is transmitted to the feeding portion 15 via the second working clutch 54, the transmission shaft 56, and the rod 70. An electric motor 57 for operating the first and second work clutches 53 and 54 to a transmission and disconnection state is provided.

  As shown in FIGS. 4, 8, 17, and 19, a vertical frame 58 is connected to the left and right center portion of the support frame 24, and a boss portion 59 that faces in the front-rear direction across the vertical frames 43 and 58 is connected. An input shaft 60 is supported by 59, and a transmission shaft 55 is connected to the input shaft 60 via a universal joint 61. A transmission case 62 is connected to the boss portion 59, and a transmission shaft 63 is supported on the transmission case 62. The bevel gear 60 a of the input shaft 60 and the bevel gear 63 a of the transmission shaft 63 are engaged with each other.

  As shown in FIGS. 6 and 9, in the direct seeding device 5, a feeding roll 64 is provided in each of the feeding parts 7, and one drive shaft 65 is rotatably supported over the feeding part 7. . The first, second, third and fourth direct seeding clutches 66a, 66b for operating and stopping the feeding portion 7 (feeding roll 64) by operating the drive shaft 65 and the feeding roll 64 of the feeding portion 7 in the transmission and shut-off state. 66c and 66d are provided in each of the feeding portions 7, and the first to fourth direct seeding clutches 66a to 66d are urged to a transmission state by a spring 68.

As shown in FIGS. 17 and 19, an eccentric pin 63b is fixed to the end of the transmission shaft 63, and as shown in FIGS. 6 and 9, a one-way clutch 69 is externally fitted to the drive shaft 65. A rod 70 is connected across the pin 63 b of the transmission shaft 63 and the arm 69 a of the one-way clutch 69.
Thereby, the reciprocating motion of the rod 70 due to the rotational motion of the transmission shaft 63 is converted into the rotational motion by the one-way clutch 69, and the drive shaft 65 is rotationally driven intermittently. The feeding roll 64 of the feeding unit 7 is intermittently rotated through the first to fourth direct seeding clutches 66a to 66d, and the seeds of the hopper 6 are fed from the feeding unit 7 by a predetermined amount. The high-pressure wind from the blower 8 is supplied to the hose 13 through the duct 47, and the soot is supplied to the seed-groove groover 12 through the hose 13 by the high-pressure wind. Seeds are supplied to the formed grooves.

  As shown in FIGS. 5 and 9, in the fertilizer application device 20, a feeding roll 64 is provided in each of the feeding portions 15, and one drive shaft 65 is rotatably supported over the feeding portion 15. . The first, second, third and fourth fertilization clutches 67a, 67b, which operate the driving part 65 and the feeding roll 64 of the feeding part 15 in the transmission and shut-off state to operate and stop the feeding part 15 (feeding roll 64), 67c and 67d are provided in each of the feeding portions 15, and the first to fourth fertilization clutches 67a to 67d are urged to a transmission state by a spring 68.

As shown in FIGS. 3, 5, and 9, an arm 56 a is fixed to the end of the transmission shaft 56, and a one-way clutch 69 is externally fitted to the drive shaft 65, and an arm 56 a of the transmission shaft 56 and an arm of the one-way clutch 69 The rod 70 is connected to 69a.
Thereby, the reciprocating motion of the rod 70 due to the rotational motion of the transmission shaft 56 is converted into the rotational motion by the one-way clutch 69, and the drive shaft 65 is intermittently driven to rotate. The feeding roll 64 of the feeding unit 15 is intermittently rotated via the first to fourth fertilization clutches 67a to 67d, and the fertilizer of the hopper 14 is fed from the feeding unit 15 by a predetermined amount. High-pressure wind from the blower 16 is supplied to the hoses 18 and 19 through the duct 32, and fertilizer is supplied to the fertilizer groover 17 through the hoses 18 and 19 by the high-pressure wind. Thus, fertilizer is supplied to the grooves formed in the field G.

[8]
Next, an operation system of the first to fourth direct seeding clutches 66a to 66d and the first to fourth fertilization clutches 67a to 67d will be described.
As shown in FIGS. 6 and 9, in the direct seeding device 5, the operation shaft 71 is rotatably supported across the feeding portion 7 in parallel with the drive shaft 65, and the first to fourth direct seeding clutches 66 a are supported on the operation shaft 71. To 66d, first, second, third, and fourth cam members 71a, 71b, 71c, and 71d are fixed with a predetermined angle shifted in phase. An electric motor 72 that rotationally drives the operation shaft 71 is provided at one end of the operation shaft 71, and a potentiometer 73 that detects the phase of the operation shaft 71 is provided at the other end of the operation shaft 71.

  As shown in FIGS. 5 and 9, in the fertilizer application device 20, the operation shaft 71 is rotatably supported across the feeding portion 15 in parallel with the drive shaft 65, and the first to fourth fertilization clutches 67 a are supported on the operation shaft 71. To 67d, first, second, third, and fourth cam members 71a, 71b, 71c, and 71d are fixed with a predetermined angle shifted in phase. An electric motor 72 that rotationally drives the operation shaft 71 is provided at one end of the operation shaft 71, and a potentiometer 73 that detects the phase of the operation shaft 71 is provided at the other end of the operation shaft 71.

  As shown in FIGS. 1 and 21, the first, second, third, and fourth stop switches 75a, 75b, 75c, and 75d are arranged in order from the right side below the steering handle 74 that steers the right and left front wheels 1. It is arranged on the left side. The first to fourth stop switches 75a to 75d are configured as push-on / push-off push buttons, and the first to fourth stop switches 75a to 75d are provided with lamps (not shown). The operation positions of the 4 stop switches 75 a to 75 d are input to the control device 100.

  As shown in FIG. 21, the control device 100 operates the electric motor 72 based on the operation of the first to fourth stop switches 75 a to 75 d as described in [9] to be described later, and the detection signal of the potentiometer 73. Is input to the control device 100. Accordingly, the first to fourth direct seeding clutches 66a to 66d and the first to fourth fertilization clutches 67a to 67d are operated in the disconnected state, and the feeding portions corresponding to the first to fourth direct seeding clutches 66a to 66d operated in the disconnected state. 7 (feeding roll 64) stops, and the feeding unit 15 (feeding roll 64) corresponding to the first to fourth fertilization clutches 67a to 67d operated in the shut-off state stops.

[9]
Next, the operation of the first to fourth direct seeding clutches 66a to 66d and the first to fourth fertilization clutches 67a to 67d by the first to fourth stop switches 75a to 75d will be described.
As shown in FIGS. 9 and 21, the first to fourth stop switches 75a to 75d are not pushed and operated (the first to fourth stop switches 75a to 75d are operated to the operating position), and the first to fourth switches The lamps of the stop switches 75a to 75d are extinguished (all-line operating state). In the full-line operating state, the first to fourth cam members 71a to 71d of the operating shaft 71 are separated from the first to fourth direct seeding clutches 66a to 66d and the first to fourth fertilization clutches 67a to 67d, and the first to fourth direct seeding clutches 66a. To 66d and the first to fourth fertilization clutches 67a to 67d are operated in the transmission state.

  As shown in FIGS. 9 and 21, when the first stop switch 75a is pushed and operated to the stop position in the full-line operation state, the lamp of the first stop switch 75a is turned on. As a result, the operating shaft 71 is rotated by a predetermined angle by the electric motor 72, and the first direct seeding and fertilizing clutches 66a and 67a are operated in the disconnected state by the first cam member 71a of the operating shaft 71.

  As shown in FIG. 9 and FIG. 21, when the first stop switch 75a is pushed to the stop position and the second stop switch 75b is pushed to the stop position, the second stop switch 75b is turned on. The lamp lights up. As a result, the operating shaft 71 is further rotated by a predetermined angle by the electric motor 72, and the second direct seeding and fertilizing clutches 66b and 67b are operated in the disconnected state by the second cam member 71b of the operating shaft 71. In this case, the first direct seeding and fertilization clutches 66a and 67a are maintained in the disconnected state by the first cam member 71a of the operation shaft 71, and the state shown in FIG. 9 is the first and second stop switches 75a and 75b. This corresponds to the state of being pushed to the stop position.

  As shown in FIGS. 9 and 21, when the first and second stop switches 75a and 75b are pushed to the stop position and the third stop switch 75c is pushed to the stop position, The lamp of the stop switch 75c is turned on. As a result, the operating shaft 71 is further rotated by a predetermined angle by the electric motor 72, and the third direct seeding and fertilizing clutches 66c and 67c are operated in the disconnected state by the third cam member 71c of the operating shaft 71. In this case, the first and second direct seeding and fertilization clutches 66a, 66b, 67a and 67b are maintained in the disconnected state by the first and second cam members 71a and 71b of the operation shaft 71.

As shown in FIGS. 9 and 21, in a state where the first, second, and third stop switches 75a, 75b, and 75c are pushed and operated to the stop position, the fourth stop switch 75d is pushed and operated to the stop position. Then, the lamp of the fourth stop switch 75d is turned on. As a result, the operating shaft 71 is further rotated by a predetermined angle by the electric motor 72, and the fourth direct seeding and fertilizing clutches 66d, 67d are operated in the disconnected state by the fourth cam member 71d of the operating shaft 71. In this case, the first, second and third cam members 71a, 71 and 71c of the operation shaft 71 maintain the first, second and third direct seeding and fertilization clutches 66a, 66b, 66c, 67a, 67b and 67c in the disconnected state. .
According to the above-described state, the first to fourth direct seeding and fertilizer application clutches 66a to 66d and 67a to 67d are brought into a full-line stop state in which they are operated in the disconnected state.

  Contrary to the above operation, in the state where the first to fourth stop switches 75a to 75d are not pushed (the first to fourth stop switches 75a to 75d are operated to the operating position), the fourth stop switch 75d is turned on. When the push button is operated, the third stop switch 75c is pushed, the second stop switch 75b is pushed, and the first stop switch 75a is pushed, the fourth direct seeding and fertilization clutches 66d and 67d are disconnected, contrary to the above. State, fourth and third direct seeding and fertilization clutches 66d, 66c, 67d and 67c are disconnected, fourth and third and second direct seeding and fertilization clutches 66d, 66c, 66b, 67d, 67c and 67b are closed, and all strips are stopped Is obtained.

  As shown in FIG. 21, a fertilization stop switch 76 is provided separately from the first to fourth stop switches 75a to 75d. The fertilizer stop switch 76 is configured as a push-on / push-off type push button, and is provided with a lamp (not shown). The operation position of the fertilizer stop switch 76 is input to the control device 100.

  As shown in FIGS. 9 and 21, when the fertilization stop switch 76 is pushed and operated to the stop position, the lamp of the fertilization stop switch 76 is turned on. Thereby, all the 1st-4th fertilization fertilizers 66a-66d and feeding part 7 (feeding roll 64) are left in the state before operation to the stop position of fertilization stop switch 76. The clutches 67a to 67d are operated in the disconnected state, and the fertilizer application device 20 (all feeding units 15 (feeding rolls 64)) stops. Next, when the fertilization stop switch 76 is pushed and operated to the operating position, the first to fourth fertilization clutches 67a to 67d return to the state before the operation of the fertilization stop switch 76 to the stop position.

[10]
Next, the overall structure of the leveling device 37 will be described.
As shown in FIGS. 4, 8, and 18, the support case 90 is bolt-connected to the bracket 24 b fixed to the left end portion of the support frame 24, and the support case 91 is bolt-connected to the support case 90. The transmission case 92 is supported so as to be swingable up and down around the horizontal axis P3 in the left-right direction.

  As shown in FIG. 8, a bracket 24c is fixed to the right end portion of the support frame 24, and a support arm 93 is swingably supported around the horizontal axis P3 in the left-right direction of the bracket 24c of the support frame 24. ing. As shown in FIGS. 8 and 18, a square pipe-shaped drive shaft 94 having a square cross section is rotatably supported in the left-right direction across the transmission case 92 and the support arm 93. A leveling member 98 and four groove forming members 99 are attached so as to be rotatable together.

  As shown in FIGS. 18 and 20, the leveling member 98 is provided with a mounting hole 98a having a square cross section in a boss portion 98b having a circular cross section, and a ring-shaped flange portion 98c in the outer peripheral portion of the boss portion 98b. In addition, six leveling portions 98d having a plurality of convex portions are provided on the outer peripheral portion of the flange portion 98c, and are integrally formed of synthetic resin. The drive shaft 94 is inserted into the mounting hole 98a of the leveling member 98, and the leveling member 98 is attached so as to rotate integrally with the drive shaft 94. In the leveling member 98, the lateral width of the boss portion 98b and the lateral width of the leveling portion 98d are It is set to approximately the same horizontal width.

  As shown in FIG. 18, the groove forming member 99 has a pair of lateral surface portions 99a formed at a predetermined interval and the radially outer ends of the pair of lateral surface portions 99a so as to approach each other. A synthetic resin comprising a pair of inclined surface portions 99b (corresponding to a wedge-shaped portion) extended obliquely and an arc surface portion 99c (arc-shaped cross section) formed so as to connect the tip ends of the pair of inclined surface portions 99b. Are integrally formed in a disk shape (sorban ball shape), and a mounting hole 99d having a square cross section is provided at the center. The drive shaft 94 is inserted into the mounting hole 99d of the groove forming member 99, and the groove forming member 99 is attached to rotate integrally with the drive shaft 94.

  As shown in FIGS. 8, 16, and 18, a leveling member 98 and a groove forming member 99 are attached to the drive shaft 94, and cylindrical spacers 101, 102, and 103 are attached between the leveling members 94. As shown in FIG. 18, the pair of lateral surface portions 99a of the groove forming member 99 is arranged along the longitudinal direction of the drive shaft 94 at a predetermined interval and is in a state perpendicular to the drive shaft 94. The pair of inclined surface portions 99b of the forming member 99 are in a state of extending obliquely outward in the radial direction so as to approach each other from the radially outer ends of the pair of lateral surface portions 99a of the groove forming member 99.

  As shown in FIG. 18, the boss part 98 b and the leveling part 98 d of the leveling member 98 are in contact with the lateral surface part 99 a of the groove forming member 99. The lateral width W2 of the groove forming member 99 (the distance between the pair of lateral surface portions 99a of the groove forming member 99) is set to be larger than the lateral width W1 of the leveling member 98 (the boss portion 98b and the ground leveling portion 98d). The outer diameter D1 of the leveling member 98 (leveling portion 98d) and the outer diameter D2 of the lateral surface portion 99a of the groove forming member 99 are set to substantially the same outer diameter, and the outer diameter D1 of the leveling member 98 (leveling portion 98d). The outer diameter D3 of the groove forming member 99 (the inclined surface portion 99b and the arcuate surface portion 99c) is set to a larger outer diameter.

  As shown in FIG. 18, a short transmission shaft 104 is rotatably supported by the transmission case 92, and the drive shaft 94 is connected to the transmission shaft 104. On the outside of the transmission case 92 (left side in FIG. 18), a short drive shaft 105 having a square pipe shape with a square cross section is connected by a bolt 106 so that one leveling member 98 can be integrally rotated with the drive shaft 105. It is attached. Thereby, the drive shaft 105 and one leveling member 98 can be removed from the transmission shaft 104 by removing the bolt 106. This structure is also employed outside the support arm 93 shown in FIG. 8 (on the right side of the drawing in FIG. 8).

  As shown in FIGS. 4, 8, and 16, a bracket 92 a is connected to the transmission case 92, a bracket 93 a is connected to the support arm 93, and a rod-shaped support is provided across the transmission case 92 and the brackets 92 a and 93 a of the support arm 93. The frame 107 is connected. A plate-shaped mudguard member 108 made of a metal plate is connected to the support frame 107, the transmission case 92, and the brackets 92a, 93a of the support arm 93, and the mudguard member 108 is disposed behind the leveling member 98, The lower end portion of the mudguard member 108 is located above the lower end portion of the rotation locus of the leveling member 98 (see FIGS. 4 and 17).

  As shown in FIGS. 8, 16, and 17, the mudguard member 108 is disposed so that the groove forming member 99 is positioned in front of the mudguard members 108 adjacent to each other with a space therebetween. The groove forming member 99 protrudes rearward from between the adjacent mudguard members 108 at intervals (see FIG. 4).

[11]
Next, the transmission structure to the leveling device 37 will be described.
As shown in FIGS. 17 and 18, the transmission shaft 95 is supported by the support case 90, and the transmission shaft 96 spans between the transmission shaft 63 (see FIG. 19) and the transmission shaft 95, and the universal joint 97 (universal joint). Connected through. As shown in FIGS. 8, 17, 18, and 19, a cylindrical cover 134 that covers the transmission shaft 96 and the universal joint 97 is attached across the transmission case 62 and the support case 90.

  As shown in FIG. 18, the transmission shaft 109 is supported across the support case 91 and the transmission case 92, and the transmission shafts 95 and 109 are connected via a cylindrical connecting member 110. A sprocket 104 a is connected to the transmission shaft 104, a sprocket 109 a is externally fitted to the transmission shaft 109 via a torque limiter 111, and the transmission chain 112 is wound around the sprockets 104 a and 109 a of the transmission shafts 104 and 109. Yes.

  Thus, as shown in FIGS. 17, 18, and 19, the power of the transmission shaft 63 is transmitted to the drive shaft 94 via the transmission shafts 96, 95, 109, the torque limiter 111, the transmission chain 112, and the transmission shaft 104. The drive shaft 94, the leveling member 98, and the groove forming member 99 are rotationally driven at a high speed in the counterclockwise direction in FIG.

  As shown in FIG. 18, the torque limiter 111 includes a first occlusion portion 111 a that is integrally rotatable and slidable by a spline structure on the transmission shaft 109, and a sprocket 109 a of the transmission shaft 109 that is externally fitted to the transmission shaft 109 so as to be relatively rotatable. The second occlusion portion 111b and the first occlusion portion 111a that are connected to each other are provided with a spring 111c that biases the second occlusion portion 111b. Thereby, in a normal state, the power of the transmission shaft 109 is transmitted to the sprocket 109a of the transmission shaft 109 in a state where the first and second engagement portions 111a and 111b are engaged by the biasing force of the spring 111c. When a large load is applied to the leveling device 37, the first occlusion portion 111 a moves away from the second occlusion portion 111 b against the spring 111 c, and the power of the transmission shaft 109 is interrupted by the torque limiter 111.

[12]
Next, the elevating structure of the leveling device 37 will be described.
As shown in FIGS. 4, 16, and 21, a support plate 113 is connected to a portion of the support frame 24 that is adjacent to the left side of the link mechanism 3, and a fan shape is formed around the horizontal axis P <b> 4 in the left-right direction of the support plate 113. The elevating gear 114 is supported so as to be swingable up and down. The boss part 115 is fitted on the drive shaft 94 so as to be relatively rotatable, and the arm 115 a of the boss part 115 is connected to the elevating gear 114.

  As shown in FIGS. 4, 16, and 21, a gear mechanism 116 is connected to the support plate 113, the pinion gear 116 a of the gear mechanism 116 is engaged with the elevating gear 114, and the electric motor 117 that drives the gear mechanism 116 is a gear. It is connected to the mechanism 116. The leveling device 37 can be driven up and down around the horizontal axis P3 by driving the pinion gear 116a of the gear mechanism 116 by the electric motor 117 and swinging the lifting gear 114 up and down. A spring 119 that biases the leveling device 37 upward is connected across the arm 26a and the support frame 107 of the left vertical frame 26 and across the arm 39a and the support frame 107 of the right horizontal frame 39. The electric motor 117 assists the ascending drive of the leveling device 37.

  The electric motor 117 is operated by the control device 100 as described in FIGS. A potentiometer 118 for detecting the angle of the elevating gear 114 with respect to the support plate 113 is attached to the support plate 113, and the detection value of the potentiometer 118 is input to the control device 100, and the leveling for the direct seeding device 5 is determined by the detection value of the potentiometer 118. The height of the device 37 can be detected.

[13]
Next, the positional relationship between the leveling device 37 and each unit will be described.
As shown in FIG. 8, the spacer 102 is located behind the right and left rear wheels 2, the side float 10 is located behind the right and left rear wheels 2, the spacer 102, and the right and left rear wheels The groove forming member 99 is located at a position away from the rear of the wheel 2 in the left-right direction. Two groove forming members 99 are positioned between the right and left rear wheels 2, and one groove forming member 99 is positioned outside the right rear wheel 2 (on the right side in FIG. 8). One groove forming member 99 is located outside the rear wheel 2 (on the left side in FIG. 8).

As shown in FIG. 8, the space between the center float 9 and the side float 10 is located behind the groove forming member 99 between the right and left rear wheels 2, and the outside of the right and left rear wheels 2. The side floats 10 and 11 are located behind the groove forming member 99.
In other words, the seed-growing groove device 12 and the fertilizer groove device 17 are not positioned behind the groove forming member 99, and the right and left rear wheels 2 are disposed in front of the adjacent seed-growing groove device 12. A groove forming member 99 is positioned between the adjacent seed-growing groover 12 and the fertilizer groover 17 (seed-groove groover 12), and the grooves on the outer sides of the right and left rear wheels 2 are located in front of each other. A forming member 99 is located.

  As shown in FIG. 8, the width W2 of the groove forming member 99 (a pair of groove forming members 99) between the groove forming member 99 between the right and left rear wheels 2, and between the center float 9 and the side float 10. The distance W3 between the center float 9 and the side float 10 is set to be slightly larger than the distance between the horizontal surface portions 99a (see FIG. 18). In the groove forming member 99 outside the right and left rear wheels 2, the side floats 10, 11 are larger than the lateral width W2 of the groove forming member 99 (interval between the pair of lateral surface portions 99a of the groove forming member 99) (see FIG. 18). The interval W4 is set to a slightly narrow interval.

  As shown in FIGS. 8 and 16, the space between the adjacent mudguard members 108 is located behind the spacer 101, and the center float 9 is located behind the space between the spacer 101 and the adjacent mudguard member 108. . The central portion 107a of the support frame 107 is bent downward, and the central portion 107a of the support frame 107 is set at a lower position than the other portions of the support frame 107.

  Accordingly, as shown in FIGS. 8 and 16, the transmission shaft 55, the universal joint 61 and the input shaft 60 are located above the spacer 101 and above the central portion 107 a of the support frame 107. Therefore, as described in [16] and [17], which will be described later, even if the direct seeding device 5 is raised to the upper limit position, the transmission shaft 55, the universal joint 61, and the input shaft 60 are connected to the spacer 101 and the central portion of the support frame 107. There is no contact with 107a.

[14]
Next, the automatic raising / lowering control means 120 of the direct seeding apparatus 5 will be described.
As shown in FIG. 21, the automatic raising / lowering control means 120 is provided in the control device 100, and the detection value of the height sensor 78 (see FIGS. 10 and 11) is input to the control device 100. The center float 9 follows the ground surface G with the progress of the airframe, and by detecting the height of the center float 9 with respect to the direct seeding device 5 from the detection value of the height sensor 78, the surface G (center float 9). To the direct seeding device 5 can be detected.

  As shown in FIG. 21, the hydraulic cylinder 4 is provided with a control valve 121 for supplying and discharging hydraulic oil, and the control valve 121 is operated by the control device 100. When the hydraulic oil is supplied to the hydraulic cylinder 4 by the control valve 121, the hydraulic cylinder 4 is contracted to raise the direct seeding device 5. When the hydraulic oil is discharged from the hydraulic cylinder 4 by the control valve 121, the hydraulic cylinder 4 Elongates and the direct seeding device 5 descends.

  As shown in FIG. 21, based on the height of the center float 9 with respect to the direct sowing apparatus 5 (height from the surface G (center float 9) to the direct sowing apparatus 5), the direct sowing apparatus 5 is maintained at the set height from the surface G. The control valve 121 is operated so that the hydraulic cylinder 4 expands and contracts (so that the detection value of the height sensor 78 (the vertical distance between the height sensor 78 and the center float 9) is maintained at the set value H1). In operation, the direct seeding device 5 automatically moves up and down (the operating state of the automatic lifting control means 120).

  As shown in FIGS. 10 and 11, three connection holes 79 a are formed in parallel (horizontal) along the arm 79, and three connection holes obliquely along the bracket 9 a of the center float 9. 9b is formed (the rear connection hole 9b is located at a higher position). Accordingly, when the center float 9 and the connecting holes 9 b and 79 a at the center of the arm 79 are used to connect the bracket 9 a and the arm 79 of the center float 9 by the bolt 122, the center float 9 is parallel to the arm 79. It is connected with.

  As shown in FIGS. 10 and 11, when the connecting holes 9 b and 79 a on the front side of the center float 9 and the arm 79 are used to connect the bracket 9 a and the arm 79 of the center float 9 with the bolt 122, The center float 9 is connected in a slightly raised position. As a result, the ground contact area of the center float 9 to the surface G is reduced, and the ground follow-up sensitivity to the surface G of the center float 9 becomes insensitive (the control sensitivity of the automatic lifting control means 121 becomes insensitive). This state is suitable for a state where the water on the surface G is relatively small and the mud on the surface G is relatively hard.

  As shown in FIGS. 10 and 11, when the connecting holes 9 b and 79 a on the rear side of the center float 9 and the arm 79 are used to connect the bracket 9 a and the arm 79 of the center float 9 with the bolt 122, The center float 9 is connected in a slightly lowering posture. Thereby, the ground contact area of the center float 9 to the surface G increases, and the ground tracking sensitivity to the field G of the center float 9 becomes sensitive (the control sensitivity of the automatic lift control means 121 becomes sensitive). This state is suitable for a state where the water on the surface G is relatively large and the mud on the surface G is relatively soft.

[15]
Next, the rolling control means 126 of the direct seeding device 5 will be described.
As shown in FIG. 21, the rolling control means 126 is provided in the control device 100. As shown in FIGS. 19 and 21, in the support frame 24, a tilt sensor 127 is attached in the vicinity of the vertical frame 43 and the boss portions 44 and 59, and a detection value of the tilt sensor 127 is input to the control device 100. The tilt sensor 127 detects the tilt angle in the left-right direction of the direct seeding device 5 (support frame 24) with respect to the horizontal plane.

  As shown in FIGS. 4 and 7, a rolling mechanism 128 is attached to the upper portion of the vertical link 3 c of the link mechanism 3. The rolling mechanism 128 includes an electric motor 128a and a wire 128b that is pushed and pulled by the electric motor 128a. A spring spans the connecting portion 89b of the vertical frame 89 and the wire 128b of the rolling mechanism 128. 129 is connected.

  As a result, the wire 128b is pushed and pulled by the electric motor 128a of the rolling mechanism 128, so that the direct seeding device 5 and the leveling device 37 roll around the longitudinal axis P2 via the spring 129. The control device 100 operates the electric motor 128a of the rolling mechanism 128 based on the detected value of the inclination sensor 127 so that the leveling device 37 is horizontal (the operating state of the rolling control means 126).

[16]
Next, the lifting lever 123 will be described.
As shown in FIGS. 1, 2, and 21, an elevating lever 123 is provided on the right side of the driver's seat 21, and the elevating lever 123 can be operated and held in an automatic position, a raised position, a neutral position, a lowered position, and a working position. The operation position of the elevating lever 123 is input to the control device 100. An angle sensor 124 for detecting the vertical angle of the link mechanism 3 with respect to the airframe is provided, and a detection value of the angle sensor 124 is input to the control device 100. By detecting the vertical angle of the link mechanism 3 with respect to the airframe, the airframe is detected. The height of the direct seeding device 5 with respect to can be detected.

  As shown in FIG. 21, in a state in which the elevating lever 123 is operated to the raised position, the neutral position, the lowered position, and the working position (the state in which the elevating lever 123 is not operated to the automatic position), the control device is described as follows. 100, the control valve 121 and the electric motor 128a of the rolling mechanism 128 and the electric motors 23 and 57 are operated, and the hydraulic cylinder 4 and the rolling mechanism 128, the first and second work clutches 53 and 54, and the right and left markers 22 are operated. Is operated. In this case, the functions of the raised position U and the lowered position D of the operation lever 125 described in [17] described later are not activated, and only the functions of the right and left marker positions R and L of the operation lever 125 are activated.

  As shown in FIG. 21, when the elevating lever 123 is operated to the raised position, the automatic elevating control means 120 and the rolling control means 126 are stopped, and the first and second work clutches 53 and 54 are operated in the disconnected state (direct seeding device). 5 and the fertilizer 20 and the leveling device 37 are stopped), the right and left markers 22 are operated to the retracted position, the hydraulic cylinder 4 is contracted, and the direct seeding device 5 is raised. If the angle sensor 124 detects that the direct seeding device 5 has reached the upper limit position with the lifting lever 123 being operated to the raised position, the hydraulic cylinder 4 automatically stops.

  As shown in FIG. 21, when the elevating lever 123 is operated to the lowered position, the automatic elevating control means 120 and the rolling control means 126 are stopped, and the first and second work clutches 53 and 54 are operated in the disconnected state (direct seeding device). 5 and the fertilizer 20 and the leveling device 37 are stopped), and the right and left markers 22 are operated to the retracted posture, the hydraulic cylinder 4 is extended and the direct seeding device 5 is lowered. When the center float 9 comes into contact with the rice field G, the automatic lifting control means 120 is activated, and the direct sowing device 5 comes into contact with the rice field G and stops (the direct sowing device 5 is maintained at the set height from the rice field G. (The state in which the direct seeding device 5 automatically moves up and down so that the detection value of the height sensor 78 (the vertical distance between the height sensor 78 and the center float 9) is maintained at the set value H1).

  As shown in FIG. 21, when the elevating lever 123 is operated to the neutral position, the automatic elevating control means 120 and the rolling control means 126 are stopped, and the first and second work clutches 53 and 54 are operated in the disconnected state (direct seeding device). 5, the fertilizer 20 and the leveling device 37 are stopped), and the hydraulic cylinder 4 is stopped in a state where the right and left markers 22 are operated to the retracted posture. By operating the elevating lever 123 to the raised position, the neutral position, and the lowered position in this way, the direct seeding device 5 can be raised and lowered to an arbitrary height and stopped.

As shown in FIG. 21, when the elevating lever 123 is operated to the working position, the automatic elevating control means 120 and the rolling control means 126 are operated with the right and left markers 22 being operated in the retracted posture, The second working clutches 53 and 54 are operated to the transmission state.
Thereby, as described in the preceding item [7], power is transmitted to the direct seeding device 5 (feeding unit 7) and the fertilizer application device 20 (feeding unit 15), and the seed surface and the fertilizer groover 12, 17 are applied to the rice field G. Seeds and fertilizer are supplied to the formed groove. As described in [11] above, power is transmitted to the leveling device 37, and the drive shaft 94, leveling member 98 and groove forming member 99 are shown in FIG. The paper is rotated at high speed in the counterclockwise direction.

[17]
Next, the operation lever 125 will be described.
As shown in FIGS. 1, 2, and 21, an operation lever 125 is provided on the right lateral side below the steering handle 74, and the operation lever 125 extends laterally outward on the right side. The operation lever 125 is configured to be movable in the cross direction from the neutral position N to the upward ascending position U, the downward descending position D, the rear right marker position R, and the front left marker position L, and is biased to the neutral position N. The operation position of the operation lever 125 is input to the control device 100.

  In the state where the elevating lever 123 is operated to the automatic position, the control valve 100 and the electric motor 128a of the rolling mechanism 128 and the electric motors 23 and 57 are operated by the control device 100 based on the operation of the operation lever 125 as described below. Then, the hydraulic cylinder 4 and the rolling mechanism 128, the first and second working clutches 53 and 54, and the right and left markers 22 are operated.

As shown in FIG. 21, when the operating lever 125 is operated to the raised position U (operated to the raised position U and operated to the neutral position N), the first and second work clutches 53 and 54 are operated to the disconnected state ( The direct sowing device 5, the fertilizer 20, and the leveling device 37 are stopped), the automatic elevating control means 120 and the rolling control means 126 are stopped, the hydraulic cylinder 4 is contracted to raise the direct sowing device 5, and the right and left markers 22 is operated to the retracted posture. When the angle sensor 124 detects that the direct seeding device 5 has reached the upper limit position, the hydraulic cylinder 4 automatically stops.

As shown in FIG. 21, when the operation lever 125 is operated to the lowered position D (operated to the lowered position D and operated to the neutral position N), the automatic elevation control means 120 and the rolling control means 126 are stopped, and the first and When the second working clutches 53 and 54 are operated in the disconnected state (the direct seeding device 5 and the fertilizer application device 20 and the leveling device 37 are stopped), and the right and left markers 22 are operated in the retracted posture, the hydraulic cylinder 4 is The direct seeding device 5 is lowered by the extension operation.
When the center float 9 comes in contact with the rice field G, the automatic lifting control means 120 and the rolling control means 126 are operated, and the direct sowing device 5 comes into contact with the rice field G and stops (the direct sowing device 5 is set to the set height from the rice field G). So that the direct sowing device 5 automatically moves up and down (so that the detection value of the height sensor 78 (the vertical distance between the height sensor 78 and the center float 9) is maintained at the set value H1). State).

  As described above, after operating the operating lever 125 to the lowered position D (after operating to the lowered position D and operating to the neutral position N), if the operating lever 125 is operated again to the lowered position D (returned to the lowered position D again). When operated to the neutral position N), the first and second work clutches 53 and 54 are operated in the transmission state with the automatic lifting control means 120 and the rolling control means 126 activated.

As shown in FIG. 21, the following operation is performed in a state where the height of the direct seeding device 5 detected by the angle sensor 124 is lower than a predetermined height set in advance.
In a state where the right (left) marker 22 is operated in the retracted position, if the operation lever 125 is operated to the right marker position R (left marker position L) for a first set time (relatively short time) or more, the right The (left) marker 22 is operated to the acting posture.
In a state where the right (left) marker 22 is operated to the action posture, the operation lever 125 is moved to the right marker position R (left marker position L) for a second set time (a time longer than the first set time) or more. When operated, the right (left) marker 22 is operated to the retracted posture.

  As shown in FIG. 21, when the direct seeding device 5 is raised and the height of the direct seeding device 5 detected by the angle sensor 124 is higher than the predetermined height set in advance, the right and left of the action posture The marker 22 is operated to the retracted posture. When the height of the direct seeding device 5 detected by the angle sensor 124 is higher than the predetermined height set in advance, the operation lever 125 is operated to the right and left marker positions R and L as described above. Regardless of this, the right and left markers 22 are maintained in the retracted posture.

[18]
Next, the elevation control of the leveling device 37 will be described.
As shown in FIGS. 1 and 21, the operation panel 131 located on the lower side of the steering handle 74 is provided with a dial operation type lift switch 132 and a dial operation type depth switch 133. The operation position of the depth switch 133 is input to the control device 100.

As shown in the preceding item [14] and FIG. 21, in the operating state of the automatic lifting control means 120, the direct seeding device 5 is maintained at the set height from the rice field G (the detection value of the height sensor 78 (the height sensor 78 And the center float 9) is maintained at the set value H1).
In this state, by detecting the height of the leveling device 37 with respect to the direct seeding device 5 based on the detection value of the potentiometer 118, the height of the leveling device 37 with respect to the field G is detected by the control device 100 based on the set value H1. . Based on the operation position of the lift switch 132 and the height of the leveling device 37 with respect to the field G, the electric motor 117 is operated by the control device 100, and the first leveling position A1, the second leveling device 37, which will be described later, is as follows. The work position A2 and the storage position A3 are moved up and down to be maintained.

  As shown in FIG. 21, when the elevating switch 132 is operated to the first position, the leveling device 37 is driven up and down to the first work position A1 and maintained at the first work position A1. In the first work position A1, the leveling member 98 and the groove forming member 99 are grounded (entered) on the surface G, and substantially all of the inclined surface portion 99b and the arc surface portion 99c (see FIG. 18) of the groove forming member 99 are formed on the surface G. In this state, the radially outer end of the lateral surface portion 99a (see FIG. 18) of the groove forming member 99 comes into contact with the field surface G.

  As shown in FIG. 21, in a state where the leveling device 37 is maintained at the first work position A1, the drive shaft 94, the leveling member 98, and the groove forming member 99 are driven to rotate at high speed in the counterclockwise direction in FIG. As a result, the surface G of the leveling member 98 is leveled. A groove is formed on the surface G at the position of the groove forming member 99, and a groove having a V-shaped cross section is formed on the surface G by the inclined surface portion 99 b and the arc surface portion 99 c of the groove forming member 99.

  As shown in FIG. 21, by operating the depth switch 133 in a state where the leveling device 37 is maintained at the first working position A1, the leveling member 98 and The contact depth (penetration depth) of the groove forming member 99 to the surface G can be finely adjusted to the deep side and the shallow side.

  As shown in FIG. 21, when the elevating switch 132 is operated to the second position, the leveling device 37 is driven up and down to the second work position A2 and maintained at the second work position A2. In the second work position A2, the leveling member 98 is positioned above the field surface G (not grounded to the field surface G), and the groove forming member 99 is grounded (enters) the field surface G. The inclined surface portion of the groove forming member 99 99b and the arcuate surface portion 99c (see FIG. 18) enter the surface G, and the radially outer end of the lateral surface portion 99a (see FIG. 18) of the groove forming member 99 does not come into contact with the surface G.

  As shown in FIG. 21, in a state where the leveling device 37 is maintained at the second work position A2, the drive shaft 94, the leveling member 98, and the groove forming member 99 are rotationally driven in the counterclockwise direction in FIG. Thus, a groove is formed on the surface G at the position of the groove forming member 99, and a groove having a V-shaped cross section is formed on the surface G by the inclined surface portion 99b and the arc surface portion 99c of the groove forming member 99.

  As shown in FIG. 21, by operating the depth switch 133 while the leveling device 37 is maintained at the second work position A2, the groove forming member 99 is based on the height of the leveling device 37 with respect to the surface G. Can be finely adjusted to the deep side and the shallow side. In this case, when the depth of the groove formed on the surface G is changed to the deep side due to the function of the inclined surface portion 99b of the groove forming member 99, the lateral width of the groove increases, and the depth of the groove formed on the surface G If the height is changed to the shallower side, the lateral width of the groove becomes smaller.

  As shown in FIG. 21, when the elevation switch 132 is operated to the third position, the leveling device 37 is driven up and down to the storage position A3 and maintained at the storage position A3. In the storage position A3, the leveling member 98 and the groove forming member 99 are located above the field G (not grounded to the field G). Even if the depth switch 133 is operated while the leveling device 37 is maintained at the storage position A3, the height of the leveling device 37 is not finely adjusted, and the leveling device 37 is maintained at the storage position A3. .

[First Alternative Embodiment of the Invention]
In place of the leveling member 98 shown in FIG. 20, a leveling member 98 as shown in FIG. 22 may be used. As shown in FIG. 22, the leveling member 98 is provided with a boss portion 98b having a circular cross section and a mounting hole 98a having a square cross section, and six arm portions 98e on the outer peripheral portion of the boss portion 98b. A leveling portion 98d having a convex portion is provided at the distal end portion of the arm portion 98e, and a notch portion 98f is formed between the adjacent arm portions 98e, and is integrally formed of synthetic resin.

  Thereby, as described in the previous item [18], in the state where the leveling device 37 is maintained at the first work position A1, when the level G is leveled by the leveling member 98, mud and water on the level G are leveled. It becomes easy to flow in the left-right direction through the notch 98f of the member 98, and the state where mud and water on the surface G are pushed forward by the leveling device 37 as the machine body advances is reduced.

[Second Embodiment of the Invention]
As shown in FIG. 23, between the groove forming member 99 between the right and left rear wheels 2, and between the center float 9 and the side float 10, the lateral width W2 of the groove forming member 99 (a pair of grooves in the groove forming member 99). Of the horizontal surface portion 99a) (see FIG. 18) and the interval W3 between the center float 9 and the side float 10 may be set to substantially the same interval. As shown in FIG. 23, in the groove forming member 99 outside the right and left rear wheels 2, the width W2 of the groove forming member 99 (the distance between the pair of lateral surface portions 99a in the groove forming member 99) (see FIG. 18) The interval W4 between the side floats 10 and 11 may be set to substantially the same interval.

  Accordingly, as shown in FIG. 23, in the right groove forming member 99 between the right and left rear wheels 2, the left end of the right side float 10 is located behind the right lateral surface portion 99 a of the groove forming member 99. And the right end of the center float 9 is positioned behind the left lateral surface 99a of the groove forming member 99. In the left groove forming member 99 between the right and left rear wheels 2, the right end of the left side float 10 is located behind the left lateral surface portion 99 a of the groove forming member 99, and the groove forming member 99 The left end of the center float 9 is located behind the right lateral surface 99a.

  As shown in FIG. 23, in the right outer groove forming member 99 of the right rear wheel 2, the left end of the right side float 11 is located behind the right lateral surface portion 99a of the groove forming member 99, The right end portion of the right side float 10 is positioned behind the left lateral surface portion 99a of the groove forming member 99. In the groove forming member 99 on the left outer side of the left rear wheel 2, the right end of the left side float 11 is located behind the left lateral surface portion 99 a of the groove forming member 99, and the right side of the groove forming member 99 is The left end portion of the left side float 10 is located behind the lateral surface portion 99a.

When a groove is formed on the surface G by the groove forming member 99 as the machine body advances, mud may rise in both laterally outer portions of the groove. In such a state, when the seed pod is supplied behind the groove forming member 99, it is conceivable that the seed potato is not supplied to an appropriate position due to the raised portion of the mud.
In this case, according to the configuration shown in FIG. 23, even if the groove is formed on the surface G by the groove forming member 99 as the airframe progresses and mud rises in both laterally outer portions of the groove, Ends of the center float 9 and the side floats 10 and 11 located behind the forming member 99 pass through the vicinity of the muddy raised portion, and the center float 9 and the side float located behind the groove forming member 99. The raised portions of mud are leveled by the ends of 10 and 11.

[Third Another Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] [Second Alternative Embodiment of the Invention], the following configuration may be added.
As shown in FIG. 24, a rake-shaped leveling member 137 is externally fitted to the spacer 102 so as to be relatively rotatable, and a rod (not shown) is connected between the leveling member 137 and the support frame 107, thereby leveling the member 137. The leveling member 137 is configured to contact the field G behind the right and left rear wheels 2. Thereby, the passing traces of the right and left rear wheels 2 are leveled by the leveling member 137.

[Fourth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] to [Third Alternative Embodiment of the Invention], the following configuration may be added.
As shown in FIG. 24, a groove forming member 138 having a larger diameter than the groove forming member 99 is connected to the end of the drive shaft 105 (see FIG. 18) in the leveling device 37, and the groove forming member 99 is driven by the drive shaft 94. , 138 may be integrally rotated. In this case, the groove forming member 138 includes the same horizontal surface portion, inclined surface portion, and arc surface portion as the horizontal surface portion 99a, inclined surface portion 99b, and arc surface portion 99c of the groove forming member 99 shown in FIG. The mudguard 108 is not provided behind.

  24 and 18, the lateral width W2 of the groove forming member 99 (the distance between the pair of lateral surface portions 99a in the groove forming member 99) and the lateral width of the groove forming member 138 (of the pair of lateral surface portions in the groove forming member 138). Are set to the same width. The outer diameter D2 of the lateral surface portion 99a of the groove forming member 99 and the outer diameter of the lateral surface portion of the groove forming member 138 are set to the same outer diameter. The outer diameter of the groove forming member 138 (inclined surface portion and arc surface portion) is set to be larger than the outer diameter D3 of the groove forming member 99 (inclined surface portion 99b and arc surface portion 99c).

  24, the groove forming member outside the right and left rear wheels 2 is larger than the outer diameter D3 of the groove forming member 99 (inclined surface portion 99b and arcuate surface portion 99c) between the right and left rear wheels 2. The outer diameter D3 of 99 (inclined surface portion 99b and arc surface portion 99c) is set to a large outer diameter, and the outer diameter D3 of the groove forming member 99 (inclined surface portion 99b and arc surface portion 99c) outside the right and left rear wheels 2 is set. Alternatively, the outer diameter of the groove forming member 138 (the inclined surface portion and the arc surface portion) may be set to a large outer diameter.

By providing the groove forming member 138 as described above, the groove forming member 138 penetrates deeper into the field G than the groove forming member 99, so that the direct sowing device 5 and the leveling device 37 can be moved laterally or vertically. Vibration in the direction is suppressed.
When mud and water on the surface G are pushed forward by the leveling device 37 as the aircraft progresses, mud and water on the pushed surface G will flow laterally outside beyond the left and right range of the leveling device 37. This state is suppressed by the groove forming member 138.

[Fifth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Another Mode for Carrying Out the Invention] to [Fourth Another Mode for Carrying Out the Invention], by directly supporting the leveling device 37 on the direct seeding device 5, the direct seeding device 5 is provided. However, in place of this configuration, a leveling device 37 and a support arm (not shown) are provided on the lower link 3b of the link mechanism 3 shown in FIG. And a ground leveling device 37 may be provided between the direct seeding device 5 and the machine body. A ground leveling device 37 is connected to the body frame 28 or the support plate 29 shown in FIG. 3 via a support arm (not shown), and the leveling device 37 is provided between the direct seeding device 5 and the body. Also good.

  When configured as described above, the power branched from the transmission shaft 63 shown in FIGS. 8 and 19 is not transmitted to the leveling device 37 (drive shaft 94), but a transmission shaft (not shown) separate from the transmission shaft 55. The transmission shaft may be connected to the leveling device 37 (drive shaft 94). Alternatively, another transmission shaft (not shown) may be branched from the middle portion of the transmission shaft 55, and this transmission shaft may be connected to the leveling device 37 (drive shaft 94).

  The present invention is not only a riding type direct sowing machine provided with a direct sowing device 5 at the rear part of the machine body, but also a seedling in which a planting mechanism (corresponding to a ground working part) (not shown) is arranged at a predetermined interval in the left-right direction. A riding type rice transplanter equipped with a planting device (corresponding to a working device) (not shown) at the rear of the machine body and a leveling device 37 (groove forming member 99) between the seedling planting device and the machine body Applicable.

2 Rear wheel 5 Working device 37 Leveling device 94,105 Drive shaft 98 Leveling member 99,138 Groove forming member 99a Horizontal surface portion 99b of groove forming member Wedge-like portion (inclined surface portion) of groove forming member
108 Mudguard member D1 Outer diameter of leveling member D3 Outer diameter of groove forming member G

Claims (4)

A work device is provided at the rear of the machine body, and a ground leveling device is provided between the work device and the machine body,
A drive shaft that is disposed in the left-right direction and is rotationally driven, a leveling member that is rotatably attached to the drive shaft, and a groove forming member that is rotatably attached to the drive shaft. Configure and prepare
A wedge-shaped portion having a wedge-shaped cross section in which the lateral width in the longitudinal direction of the drive shaft becomes narrower toward the outside in the radial direction is provided in the groove forming member,
When the drive shaft is rotationally driven, the leveling member is rotationally driven to level the surface, and the groove forming member is rotationally driven to form a groove on the surface .
A paddy field vehicle provided with a mudguard member behind the leveling member and provided with the mudguard member so that the groove forming member is positioned in front of the adjacent mudguard members with a predetermined interval therebetween . A pair of lateral surfaces arranged along the longitudinal direction of the drive shaft at a predetermined interval and perpendicular to the drive shaft, and a radial direction so as to approach each other from the radially outer ends of the pair of lateral surfaces A pair of inclined surface portions extending obliquely on the outside, and constituting the groove forming member,
The pair of inclined surface portions as the wedge-shaped portion,
The paddy field work vehicle according to claim 1, wherein an outer diameter of the groove forming member is set to be larger than an outer diameter of the leveling member. A work device is provided at the rear of the machine body, and a ground leveling device is provided between the work device and the machine body,
A drive shaft that is disposed in the left-right direction and is rotationally driven, a leveling member that is rotatably attached to the drive shaft, and a groove forming member that is rotatably attached to the drive shaft. Configure and prepare
When the drive shaft is rotationally driven, the leveling member is rotationally driven to level the surface, and the groove forming member is rotationally driven to form a groove on the surface.
Wherein the rear of the leveling member includes a mudguard member so as to position the groove forming member to the front between adjacent mudguard member at a predetermined interval, Oh Ru water field work vehicle provided with the mudguard member.   The paddy field work vehicle according to any one of claims 1 to 3, wherein the groove forming member is located at a position deviated in a left-right direction from a rear side of a rear wheel that supports the machine body.

Images