JP2014138566A - Paddy field working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy field working machine capable of favorably forming a groove for drainage on a paddy field, and keeping the groove for drainage formed on the paddy field in a good condition while avoiding a bad influence caused by mud splashed by a rear wheel.SOLUTION: A working part is connected to the rear part of a traveling vehicle body. The working part includes: a mud guard member 95 located in the rear of a rear wheel 2 provided on the traveling vehicle body to prevent mud splashed by the rear wheel 2 from being scattered backward; a ground leveling float 21 for leveling a paddy field; and a grooving device 88 for forming a groove for drainage on the paddy field.

Description

  The present invention relates to a paddy field machine such as a direct seeder or a rice transplanter.

In the direct seeding machine as an example of the paddy field work machine, there has been conventionally configured as follows.
That is, the working device provided at the rear part of the traveling vehicle body is provided with a plurality of leveling floats that level the field surface in a state aligned in the vehicle body width direction, and is located on the front side of the leveling float in a side view of the vehicle body, and A mudguard member is provided for receiving mud mud splashed rearward by the rear wheel in a state positioned behind the rear wheel provided on the traveling vehicle body so that the mud does not scatter to the work device. In a state of being provided at a position biased to the front side of the float, it was configured to include a grooving device for forming a drainage groove on the paddy surface. And this mudguard member and the grooving device were provided in the state where the position shifted | deviated to the horizontal width direction with respect to the leveling float in the front-back direction view (for example, refer patent document 1).

JP 2012-90527 A

  In the above-described conventional configuration, the mud mud splashed upward by the rear wheel is received by the mud muting member, so that mud mud can be avoided from being scattered in the working part, and the mud muting member supporting structure is used. A groove cutter is provided. By configuring in this way, the field surface after the rear wheel in the traveling vehicle body has passed is softened by being dug by the passage of the rear wheel, so on the rear side of such a rear wheel, By providing, even if it is a case where a paddy field is hard mud, there exists an advantage which can form the groove | channel for drainage in a paddy field well.

  However, in the above-described conventional configuration, the grooving device is prepared by the grooving device because the grooving device is provided at a position shifted in the lateral width direction with respect to the leveling float in the front-rear direction and biased to the front side of the leveling float. The leveling float passes through the side of the drainage groove. Then, as described above, even if a drainage groove is formed on the paddy surface by passing through the groove cutter, the leveling float passes through the position shifted in the lateral width direction after passing through the groove cutter, There is a possibility that the mud pushed by the leveling float enters the groove, and the groove created by the grooving device is destroyed.

  The purpose of the present invention is to maintain the drainage grooves formed on the paddy surface in good condition while avoiding the adverse effects of the mud that jumps up by the rear wheels, while being able to form the drainage grooves on the paddy surface. It is in the point which provides the paddy field machine which becomes easy.

The characteristic configuration of the paddy field working machine according to the present invention is such that the working part is connected to the rear part of the traveling vehicle body,
A mudguard member that prevents the mud that splashed up by the rear wheel from splashing rearward in a state of being located behind the rear wheel provided in the traveling vehicle body in the working unit, a leveling float that performs leveling of the field surface, and a field surface Are each provided with a groove cutter for forming a drainage groove.

  According to the present invention, the grooving device is provided in a state of being located behind the rear wheel, so the grooving device forms a draining groove on the softened surface by dug the surface by the passage of the rear wheel. Therefore, even when the paddy surface is hard mud, it becomes easy to form a draining groove on the paddy surface.

  And since each of the leveling float and the grooving device is provided in a state of being located behind the rear wheel, the grooving device is used for drainage with respect to the surface leveled by the leveling float or the leveled surface after leveling. A groove is formed. That is, since the surface after leveling by the leveling float is maintained in the leveled state, the drainage groove formed by the grooving device is maintained in a good state.

  Also, since a mudguard member is provided at the rear of the rear wheel, the mud that splashes up rearward and upward by the rear wheel is received by the mudguard member, so that the mud is scattered and deposited on the leveling float. It is possible to avoid adverse effects such as scattering to other devices in the unit and the operation of the device not being performed satisfactorily.

  Therefore, according to the present invention, it is possible to satisfactorily form a drainage groove on the paddy surface, and to easily maintain the groove formed on the paddy surface in a good state while avoiding the adverse effects of mud that jumps up by the rear wheel. We came to be able to provide a paddy field machine that would be useful.

  In the present invention, a leveling member is provided for leveling the paddy field at a position rearward of the rear wheel in a side view of the vehicle body and laterally laterally with respect to the rear wheel in a front view of the vehicle body. It is preferable that

  The rear wheel provided in the paddy field work machine includes a traveling lug that is wide in the lateral direction and easy to escape from the mud, so as to travel on the paddy field that is soft ground. When a rear wheel equipped with such a traveling lug travels on the surface of the field, mud lump on the surface of the field may be lifted by the traveling lug as the rear wheel rotates. After being lifted, it falls downward due to its own weight. In many cases, the mud lump falls from a lateral side location of the traveling lug and is located at a location that is biased to the rear side and lateral side of the rear wheel on the paddy surface. If such a mud mass remains, the leveling float rides on the mud mass and there is a possibility that the drainage groove cannot be formed satisfactorily by the grooving device.

  Therefore, according to this configuration, the leveling member is provided at a position that is rearward of the rear wheel and laterally lateral to the rear wheel. By configuring in this way, the leveling member can level the ground so that the mud mass lifted by the rear wheel as described above is broken and leveled.

  Therefore, according to the present configuration, even if the mud lump is lifted by the rear wheel, the disadvantage of the leveling float riding on the mud lump is avoided, and the groove for drainage is improved by the grooving device. It becomes possible to form.

  In the present invention, it is preferable that the leveling member is provided at a position biased forward of the mudguard member in a side view of the vehicle body.

  According to this configuration, since the leveling member is biased to the front side of the mudguard member, for example, when there is a mud mass on the surface, before the mud mass contacts the mudguard member In addition, the mud lump can be crushed and leveled in advance by the leveling member, and disadvantages such as damage to the mudguard member due to the mud lump can be avoided.

  In the present invention, it is preferable that the leveling member is provided in a state of being positioned on both the left and right sides with respect to the rear wheel as viewed from the front of the vehicle body.

  According to this configuration, the mud lump can be broken and leveled by the leveling member on each of the left and right sides of the rear wheel, and the mud lump can be broken and leveled across a wide range in the lateral direction. it can.

In the present invention, the leveling float is provided behind the pair of left and right rear wheels in the traveling vehicle body,
It is preferable that the center float located in the middle part of the leveling float on both the left and right sides is provided in a state of protruding forward from the leveling float.

  According to this configuration, the leveling float is provided behind the pair of left and right rear wheels, respectively, and the mudguard member and the grooving device are provided respectively behind the pair of left and right rear wheels. And since there is no wheel in the front side of the center float located in the middle part of the leveling floats on the left and right sides, the rice field is not roughened by the wheels. Therefore, the center float that acts on the rice field that has not been damaged by the wheels is often used as a float for detecting the work height.

  And according to this structure, since the center float is provided in a state of projecting forward from the leveling float, the ground contact width can be made longer in the front-rear direction, and the change in the work height based on the variation of the contact pressure is achieved. Can be sensed and detected sensitively.

In the present invention, a front-side frame body that is positioned on the front side of the working portion and extends along the vehicle body width direction, and a rear-side frame that is positioned on the rear side of the working portion and extends along the vehicle body width direction The body is connected by a plurality of front and rear frame bodies to form a working unit frame,
It is preferable that the mudguard member is provided in the front-rear frame body.

  According to this configuration, the front-side frame body and the rear-side frame body, both extending along the vehicle body width direction, are connected by the plurality of front-and-rear frame bodies to form a working frame as a strong frame structure. Has been. And since the mudguard member is provided in the front-rear frame body, the mudguard member can be firmly supported using the working part frame which is a strong frame structure.

In the present invention, the leveling float is capable of swinging up and down around the horizontal axis located on the rear side in the longitudinal direction of the vehicle body, and the vertical swing range is restricted within the set range by the swing restriction mechanism. Provided,
It is preferable that the swing restricting mechanism is provided in the front-rear frame body.

  According to this configuration, the leveling float is supported so that it can swing up and down around the horizontal axis while the front side moves up and down. When the ground contact pressure fluctuates, it is possible to avoid applying an excessive force by swinging the leveling float up and down.

  The leveling float is regulated in the vertical swing range by the swing restricting mechanism, and the swing restricting mechanism is provided in the longitudinal frame body. Although the leveling float may receive a strong force due to the reaction force from the ground, the swing regulating mechanism can be firmly supported by using the working unit frame that is a strong frame structure.

It is a side view of a paddy field machine. It is a top view of a paddy field machine. It is a side view of a working part. It is a vertical side view of a working part. It is a rear view of a working part. It is a vertical rear view of a working part. It is a top view which shows the arrangement structure of a working part lower part. It is a transmission system diagram of a working part. It is a perspective view of a working part frame. It is a notch side view of a raising / lowering control mechanism arrangement | positioning part. It is a front view which shows a rolling lock mechanism. It is a side view which shows a rolling lock mechanism. It is a vertical side view of a side float arrangement | positioning part. It is a top view of a side float arrangement | positioning part. It is a perspective view of a supporting member. It is a vertical side view of the side float arrangement | positioning part of another embodiment. It is a bottom view of the groove cutter of another embodiment.

Hereinafter, an embodiment of a paddy field working machine according to the present invention will be described based on the drawings.
As shown in FIGS. 1 and 2, the paddy field work machine includes a driving unit 4 in a traveling vehicle body 3 having a pair of left and right front wheels 1 and a pair of left and right rear wheels 2, and is moved up and down at the rear end of the traveling vehicle body 3. The working unit A is connected to the hydraulic cylinder 5 so as to be movable up and down through the link mechanism 6 by operating the hydraulic cylinder 5. The driving unit 4 includes a steering handle 7 that steers the left and right front wheels 1, a traveling speed change lever 8, and an operation lever 9 that performs a lifting operation of the working unit A and the like.

  A traveling transmission system is provided that transmits the driving force from the engine 10 mounted on the front portion of the traveling vehicle body 3 to the front wheels 1 through the transmission case 11 and also transmits to the rear wheels 2 through the rear wheel driving case 12. In addition, a drive power from the transmission case 11 is transmitted to the external output shaft 13, and a work transmission system is further transmitted from the external output shaft 13 to the input shaft 15 provided in the feed case 14 in the working section A. Yes.

  As shown in FIG. 3, the link mechanism 6 includes an upper link 6a and a pair of left and right lower links 6b whose front ends are swingably supported with respect to the rear end of the traveling vehicle body 3, and these rear ends. The vertical link 6c is pivotally connected to the rear end portion, and the rear end portion is moved up and down by the operation of the hydraulic cylinder 5.

  The working portion A is supported at the lower end position of the vertical link 6c so as to be swingable about the rolling axis X in the front-rear orientation. That is, as shown in FIG. 3, the feed case 14 in the working unit A is a rolling shaft that is in a front-rear posture with respect to the vertical link 6 c at a rotation fulcrum 16 provided at a position slightly higher than the input shaft 15. It is supported so as to be swingable around the core X.

The working unit A will be described.
As shown in FIGS. 1 and 3, the working unit A includes a seeding device 17 that performs surface seeding of six strips on a field scene, a fertilizer device 18 that supplies powdered fertilizer to the field scene, and a field scene. On the other hand, it has a configuration including a drug spraying device 19 for spraying herbicides and the like. Further, the fertilizer application device 18 is located closest to the front side of the machine body, the seeding device 17 is located on the rear side of the machine body of the fertilizer application device 18, and the drug spreader 19 is located on the rear side of the machine body of the seeding device 17. , They are arranged in the front-rear direction. In addition, the working unit A is provided with a center float 20 located at the center in the lateral width direction and a pair of left and right side floats 21 located on the left and right sides as a float F for leveling the field scene to be worked. Yes.

  The sowing device 17 is configured to sow seeds for 6 strips on a field scene prepared by the center float 20 and the side float 21 using seed pods that have been subjected to iron coating treatment as seeds to be seeded. . Specifically, it is configured to perform so-called spot sowing in which a plurality of seeds are sown at intervals in the front-rear direction. And in this sowing apparatus 17, the surface sowing to the field scene is implement | achieved, suppressing a bird damage by using the seed vat with which the iron coating process was performed.

  In addition, when sowing seed fertilizer treated with such an iron coating, the water content in the field is adjusted so that the seed soak becomes a hard rice field so that it is not buried deeply in the field. Then, when the traveling vehicle body 3 travels, the hard mud may be agglomerated and lifted by the traveling lugs 2A of the rear wheels 2 and dropped and released onto the field, and may fall on the rice field and rise.

  As shown in FIGS. 3 to 5, the seeding device 17 includes a seed hopper 22 that stores seed pods, six seed feeding units 23 that feed seeds from the seed hopper 22, and seeds fed from various child feeding units 23. And a guide tube 24 that guides the vehicle directly below in a state in which the influence of the wind is suppressed.

  The six seed feeding sections 23 are located behind the center float 20 and the side float 21 that are in contact with the farm scene in plan view, and are provided so as not to overlap with them, and a seed feeding roll provided therein. The seeds fed from 25 are configured so that they can be dropped and supplied directly to the field scene by their own weight without interfering with the center float 20 and the side float 21.

  The guide tube 24 is disposed below the seed feeding portion 23, and is formed in a substantially constricted shape in a plan view with a narrowed bottom and a rear portion opened in a front-rear direction view. It is comprised by the plate body, and it is comprised so that the seed potato drawn out in the state open | released to the up-down direction can be dropped below.

  As shown in FIGS. 3, 4, and 6, the fertilizer application device 18 is fed from a fertilizer hopper 26 that stores fertilizer, six fertilizer feeding sections 27 that feed out the fertilizer from the fertilizer hopper 26, and each fertilizer feeding section 27. Six fertilizer hoses 28 for guiding the fertilizer flowed down, a grooving device 29 for creating a groove for supplying fertilizer guided by the fertilizer hose 28 in the field, and a covering board 30 for refilling the groove Is provided.

  As shown in FIG. 3, the grooving device 29 includes a grooving tool 31 for cutting a groove in a farm scene, and a fertilizer guide tool 32 for guiding the fertilizer into the groove created by the grooving tool 31. It is configured. The groove cutting tool 31 is formed in a triangular shape in a side view and a tapered shape (a wedge shape) in a plan view, and is connected so as to protrude downward from the bottom surfaces of the center float 20 and the side float 21. A rubber-made bellows cylindrical connection member 33 is attached to the upper portion of the fertilizer guide 32, and the fertilizer hose 28 is inserted into the connection member 33.

  As shown in FIG. 7, the earth covering plate 30 is attached to a position located on the rear side of the groove forming device 29 on the bottom surface of the center float 20 and the side float 21, and is directed outward in the lateral width direction and toward the rear side. It is provided in a cantilevered state. The fertilizer feeding unit 27 is configured such that a fertilizer feeding roll (not shown) is rotated by the driving force transmitted from the traveling vehicle body 3, and the fertilizer received in the recesses is sequentially fed each time it rotates.

  As shown in FIG. 1, the drug spraying device 19 includes a main body case 36 at a lower part of a drug hopper 35 in which a drug such as a herbicide is stored. Although not described in detail in the main body case 36, the electrically operated feeding mechanism 37 for feeding the powdered medicine stored in the medicine hopper 35 and the medicine fed from the feeding mechanism 37 are scattered. And a diffusion blade 38 driven by an electric motor.

  The medicine spraying device 19 is arranged at a high position above the fertilizer hopper 26 so that the medicine can be sprayed in an area corresponding to the sowing width (width of 6 lines). It arrange | positions in the state located in back of the sowing apparatus 17. FIG.

The transmission structure of the working unit A will be described.
As shown in FIG. 8, the power from the traveling vehicle body 3 side is transmitted via the input shaft 15 provided at the lower position of the rolling shaft core X, the transmission shaft 39 facing forward and backward, and the bevel gear mechanism 40 in the feed case 14. Power is transmitted to the lateral transmission shaft 41, and the lateral transmission shaft 41 extends over substantially the entire width in the vehicle body lateral width direction.

  And the fertilizer drive shaft 42 extended over substantially the full body width direction along the vicinity of each fertilizer supply part 27 in the fertilizer application apparatus 18 is provided, and the fertilizer supply roll 34 of each fertilizer supply part 27 in the fertilizer application apparatus 18 is provided. Three strip drive shafts 43 that are rotationally driven one by one are provided. A swing operation arm 44 is provided at the right end portion in the longitudinal direction of the fertilizer application drive shaft 42 via a one-way clutch 39 so as to be integrally rotatable, and the swing end portion of the swing operation arm 44 and the lateral transmission shaft 41 are provided. A rotary arm 45 attached to the right end is interlocked and connected via a push-pull rod 46.

  The three drive gears 47 attached to the fertilizer application drive shaft 42 and the driven gears 48 attached to each of the three strip drive shafts 43 are engaged with each other, and six fertilizers are fed by the power of the fertilizer application drive shaft 42. The transmission system is configured to drive and rotate the fertilizer supply roll 34 of the section 27.

  According to this configuration, when the rotary arm 45 rotates with the rotation of the lateral transmission shaft 41, the swing operation arm 44 is reciprocally swung within a predetermined range via the push-pull rod 46, and the fertilization drive shaft 42 is kept constant. It is rotated by a predetermined amount in the direction. Then, the fertilizer is sequentially fed by the fertilizer feeding unit 27, and the fertilizer fed from the fertilizer feeding unit 27 is supplied to the farm scene through the fertilizer hose 28. Each of the three drive shafts 43 is provided with a gear clutch 49 that can be turned on and off separately to supply fertilizer to all the six strips, and some strips (two or four strips). ) Only to supply fertilizer.

  A seeding drive shaft 50 is provided extending along the vicinity of various child feeding parts 23 in the seeding device 17 over substantially the entire width in the vehicle body width direction, and a transmission case 51 is attached to the right end of the seeding device 17. The right end of the lateral transmission shaft 41 is interlocked and connected to the seeding drive shaft 50 via a chain transmission mechanism 52 provided in the transmission case 51.

  The drive gear 53 attached to the sowing drive shaft 50 and the driven gear 54 attached to the roll shaft 55 of the various child feeding portions 23 are engaged with each other, and six seed feeding portions are driven by the power of the sowing drive shaft 50. The transmission system is configured to drive and rotate the 23 seed feeding rolls 25. In addition, although not shown, a state in which seeds are supplied to all the six strips in conjunction with the operation of each strip clutch 49, and a state in which seeds are supplied to only some strips (two or four strips). And can be switched.

FIG. 9 shows a working unit frame D in the working unit A, and the configuration of the working unit frame D will be described below.
On the front side, a square pipe-shaped main frame body 56 (an example of a front side frame body) is provided so as to be integrally connected to the feed case 14 and extend in a long shape along the lateral direction of the vehicle body. ing. In addition, a plurality of front and rear facing frame bodies 57 are provided at intervals in the lateral direction of the vehicle body in a state of being fixed to the lower surface of the main frame body 56 and extending in the front and rear direction. A longitudinal frame body 58 is erected from the rear end portions of the plurality of longitudinal frame bodies 57 and is connected to and supported by the longitudinal frame body 58 and is elongated along the lateral width direction of the vehicle body. A square pipe-shaped sowing frame body 59 (an example of a rear side frame body) is provided in a state extending in a shape. Each of the six seed feeding portions 23 is supported by the sowing frame body 59, and the seed hopper 22 and the guide cylinder 24 are supported by the seed feeding portion 23.

  In addition, a plurality of front and rear facing frame bodies 57 are provided in a total of five at both lateral end positions in the lateral width direction and in the lateral center positions of the center float 20 and the left and right side floats 21. Further, a total of three support frame bodies 60 are fixedly erected from the respective left and right end portions of the main frame body and the upper portion of the feed case 14. And the square pipe-shaped fertilization frame body 61 is provided in the state which connects the upper end parts of these three support | pillar frame bodies 60, and extends in the elongate shape along the vehicle body width direction. Each of the six fertilizer feeding parts 27 is supported by the fertilization frame body 61, and the fertilizer hopper 26 and the fertilization hose 28 are supported by the fertilizer feeding part 27.

  As described above, the working unit frame D forms a frame structure having a large support strength in a substantially sun-shaped shape in plan view by the main frame body 56, the seeding frame body 59, and the plurality of front and rear frame bodies 57. doing.

  A central support frame body 62 is fixedly extended from the upper end of the feed case 14 toward the rear side. The central support frame body 62 is made of a round pipe material bent in a substantially L shape in a side view, and the rear end side portion of the front-rear linear portion extending rearward from the upper end portion of the feed case 14 is a seeding frame body. 59 is supported by a fixed support member 62a, a longitudinal portion is extended upward from the rear end portion of the linear portion in the front-rear direction, and the medicine spraying device 19 is supported at the upper end portion.

  As described above, the working unit A is supported so as to be swingable about the rolling axis X in the front-rear orientation, but when the working unit A is raised to the maximum ascending position, the working unit A is tilted left and right. A rolling lock mechanism 63 for forcibly returning the posture to the neutral position is provided.

  That is, as shown in FIGS. 10 to 12, the pair of left and right lower links 6 b are respectively extended rearward from the pivot connection position with the vertical link 6 c, and a U-shaped connector 64 is provided in the extended portion. The rod 65 is pivotally connected via the. Each rod 65 is disposed along the vertical direction in a state where the bracket 66 fixed to the main frame body 56 is inserted. Each rod 65 is fitted with coil springs 67 and 68 on both upper and lower sides of the bracket 66. The upper coil spring 67 is received and supported by the connector 64 and the bracket 66, and the lower coil spring 68 has an upper end. Is supported by the bracket 66 and supported by the lock nut 69 at the lower end. In this way, the rolling lock mechanism 63 is configured.

  When the working part A is raised to the maximum ascending position, the pair of left and right rods 65 rises relative to the main frame body 56, the lower coil spring 68 is compressed and brought into close contact, and the rolling operation is locked. Then, the right and left inclined posture of the working unit A becomes the neutral position.

  The center float 20 and the left and right side floats 21 are supported by a front-rear frame body 57a provided at a position corresponding to each. Hereinafter, the support structure of each float 20 and 21 will be described.

  As shown in FIG. 3, the center float 20 is swingable up and down around the horizontal axis P located on the rear side in the longitudinal direction of the vehicle body, and the front side portion is allowed to move up and down within a set range. It is supported. That is, a U-shaped support member 70 in a plan view is connected and fixed to the rear end portion of the front-rear frame body 57a provided corresponding to the center float 20 in a state of extending downward. A substantially U-shaped fulcrum bracket 71 connected to the center float 20 by a bolt is pivotally connected to the lower end of the shaft so as to be swingable around the horizontal axis P.

  The front side of the center float 20 is supported so as to be lifted and lowered within a predetermined range. That is, as shown in FIG. 10 and FIG. 11, it is formed in the front side portion on the upper surface portion of the center float 20 through the fixing bracket 72 so as to be long in the vertical direction and substantially in a gate shape in front view. A linkage member 73 is attached. Long holes 74 that are long in the vertical direction are formed on the left and right side surfaces of the linkage member 73. A fixed rod 75 that passes through the elongated hole 74 to the left and right is supported by a pair of left and right support arms 76 that are fixedly extended in a cantilevered manner from the main frame body 56 toward the front. That is, the center float 20 is supported by the main frame body 56 via the linkage member 73 and the fixed rod 75. Since the fixed rod 75 and the linking member 73 can move up and down relatively within the range of the long hole 74, the center float 20 can swing up and down within the range of the long hole 74 with respect to the main frame body 56. Will be supported.

  The ground height of the swing fulcrum position (P) (corresponding to the ground height of the working unit A) is set to the ground height in accordance with the change in the vertical swing posture accompanying the ground pressure fluctuation of the center float 20. An elevating control mechanism 77 for controlling the operation of the elevating hydraulic cylinder 5 is provided.

  Further, the end of the outer wire 78a of the operation wire 78 is supported on the upper surface of the linking member 73, and the end of the inner wire 78b of the operation wire 78 is connected to the fixed rod 75. The hydraulic switching valve 79 that controls the supply / discharge state of the hydraulic oil to / from the hydraulic cylinder 5 is linked and linked. Although not described in detail, the hydraulic switching valve 79 is set so that the vertical position of the front side portion of the center float 20 becomes the set position, in other words, the ground height of the working unit A becomes the set height. Are linked and linked so that In this way, the elevation control mechanism 77 is configured.

  As shown in FIG. 11, the linkage member 73 and the pair of left and right support arms 76 that constitute the elevation control mechanism 77 are provided at a position biased to the right side of the center float 20 from the left and right center position, and the rolling lock mechanism 63. The right and left rods 65 of the left and right rods 65 are provided in a state of being located in the middle of the left and right of the pair of left and right support arms 76 in plan view.

  Like the center float 20, the left and right side floats 21 can swing up and down around the horizontal axis P located on the rear side in the longitudinal direction of the vehicle body, and the front side portion allows vertical movement within a set range. It is supported in the state to do.

  As shown in FIG. 13, the left and right side floats 21 are integrally connected to the rear end portions of the front and rear facing frame bodies 57 a provided corresponding to the respective side floats 21, similarly to the center float 20. It is supported by the support member 70. The support member 70 is formed in a substantially U-shape that is opened rearward in a plan view, and a substantially U-shaped fulcrum bracket in front view that is bolted to each side float 21 with respect to the support member 70. 81 is pivotally connected so as to be swingable around the horizontal axis P.

  The side float 21 and the center float 20 on both the left and right sides are configured such that the vertical swing axis position (P) is located on the same axis, and the bottom surfaces of the side float 21 and the center float 20 have the same height with respect to the rice field. The vertical position is set as follows. Further, the center float 20 protrudes forward from the front end portion of the side float 21. The center float 20 increases the distance from the vertical swing axis position (P) to the front end portion as much as possible to provide a sensing function. It is configured to be able to increase.

  As shown in FIG. 13, an engagement member 82 that protrudes further forward than the front end of the side float 21 is provided at a front side portion of the side float 21 in a state of being bolted to the upper surface of the side float 21. . A swing restricting mechanism 83 that restricts the vertical swing range of the side float 21 to a range narrower than the vertical swing range of the center float 20 by acting on the engaging member 82 is provided.

  In other words, the contact engagement portion 84 is provided at a position facing the engagement member 82 on the lower surface side of the front-rear frame body 57a so as to protrude downward, and further downward from the lower surface side of the front-rear frame body 57a. A locking rod 85 is fixedly extended in a state of extending toward. The locking rod 85 is provided in a state of being inserted through the insertion hole 86 formed in the engagement member 82, and a receiving portion 87 having a diameter larger than the lateral width of the insertion hole 86 is provided at the lower end portion. The insertion hole 86 is formed as a long hole in the front-rear direction so as to allow the side float 21 to swing around the horizontal axis P.

  Accordingly, the side float 21 is restrained from further descending when the engaging member 82 is received and locked to the receiving portion 87 provided on the locking rod 85, and the engaging member 82 is contacted and engaged. 84 is contacted from the lower side to prevent further elevation, and the engaging member 82 and the contact engaging portion 84 constitute a swing restricting mechanism 83.

  As shown in FIGS. 13 and 14, a grooving device 88 is provided on the bottom surface of each of the left and right side floats 21 to form drainage grooves on the rice field. The grooving device 88 is located in a region on the rear side in the vehicle longitudinal direction with respect to the position of the horizontal shaft core P as the vertical swing shaft core of the side float 21, and is located on the vehicle rear side with respect to the covering plate 30. In the state, the base plate 30 and the cover plate 30 are arranged so as to partially overlap along the vehicle body width direction in a front view of the vehicle body.

  The grooving device 88 is provided in a state of projecting downward from the bottom surface of the side float 21, has a substantially V-shaped longitudinal cross-sectional shape, is formed in a triangular shape in a side view and a tapered shape in a plan view, It is formed of a plate-like body. The side float 21 is mounted on the side float 21 via a support member 89 in a state of being located in a region on the rear side in the vehicle longitudinal direction with respect to the position of the horizontal axis (vertical swing axis) P of the side float 21.

  As shown in FIGS. 14 and 15, the support member 89 is configured by a plate-like body formed in a tapered shape in a plan view, and its wide rear end side portion is bent into a substantially U shape in a side view. Configured. The groove cutter 88 is integrally fixed to the lower surface side of the support member 89, and the support member 89 is attached and fixed to the side float 21.

  In other words, the bent portion 89D bent in a substantially U shape on the rear end side of the support member 89 is supported in a state where the rear end side of the side float 21 is sandwiched and held, and the front side portion of the support member 89 is supported. Are fixedly attached to the side float 21 in a state of being fastened together with the fulcrum bracket 81 by a connecting bolt 90.

  The side float 21 is formed by blow-molding a synthetic resin material, and is configured by an integrally molded product of the synthetic resin material. On the other hand, the groove cutter 88 is made of a metal material because durability is required. The bottom surface of the side float 21 and the edge of the groove cutter 88 are arranged so that foreign matter such as straw scraps present in the field is not caught at the joint between the side float 21 and the groove cutter 88. A convex portion 91 is provided that is located on the front side of the vehicle body with respect to the contact surface between the two at the joint portion therebetween and projects downward from the contact surface.

  That is, as shown in FIG. 13, a mud removal recess for allowing soft mud or the like that accumulates on the surface of the paddy surface to escape rearward without a large amount being pushed away laterally outwardly at the center of the bottom surface of the side float 21. 92 is formed. The central plate portion 93 in which the mud draining recess 92 is formed has a single-plate structure formed thicker than other portions, and using this central plate portion 93, the fulcrum bracket 81, Each of the engaging member 82 and the supporting member 89 is connected to the bolt. Further, the mud removing recess 92 extends rearward to a position corresponding to the horizontal axis (vertical swing axis) P of the side float 21, and a position on the rear side is formed in a hollow shape. .

  As a result, in the hollow portion 94 located on the rear side of the mud draining recess 92, the bottom surface of the side float 21 is located below the center plate portion 93. That is, the support member 89 includes a front horizontal portion 89A in a horizontal posture along the central plate portion 93, and an oblique portion 89B in an oblique posture that is continuous with the front horizontal portion 89A and positioned downward on the rear side. A rear horizontal portion 89C in a horizontal posture that is continuous with the oblique portion 89B and along the bottom surface of the hollow portion 94, and a bent portion 89D on the rear end side in a state of being connected thereto.

  13 and 15, the front end portion of the rear side horizontal portion 89C of the support member 89 is bent and formed so as to protrude downward from the lower end of the front end portion of the groove cutter 88. Is forming. The convex portion 91 is located on the front side of the vehicle body from the contact surface between the bottom surface of the side float 21 and the edge of the groove cutter 88 and protrudes downward from the contact surface. .

  By comprising in this way, it can avoid that impurities, such as straw scraps, are pinched | interposed into the junction location between the bottom face of the side float 21 and the edge of the groove cutter 88. FIG.

  As shown in FIGS. 7, 13, and 14, the working unit A prevents the mud that jumps up from the rear wheel 2 from splashing rearward in a state of being located behind the rear wheel 2 provided in the traveling vehicle body 3. A mudguard member 95 is provided. And the side float 21 is provided in the state located behind the rear wheel 2 and behind the mudguard member 95.

  Then, a rake member 96 for leveling the field surface (at a leveling member of the leveling member) at a position rearward of the rear wheel 2 in a side view of the vehicle body and laterally laterally with respect to the rear wheel 2 in a front view of the vehicle body. An example) is provided. The rake member 96 is provided at a position biased forward of the mudguard member 95 in a side view of the vehicle body.

  As shown in FIG. 13, a front-rear frame body 57 a provided corresponding to the left and right side floats 21 is formed to extend toward the front side of the vehicle body from the main frame body 56. A mudguard 95 having a vertically oriented posture is attached in a state of being integrally fixed to the front end portion of the orientation frame body 57a.

  The mudguard member 95 has an upper portion 95A formed in a substantially vertical shape, and a lower portion 96B formed in an inclined shape positioned rearward on the lower side. The upper portion 96 </ b> A has a width that is substantially the same as the width of the side float 21 and a vertical width that extends from a position that is substantially the same as the lower end position of the main frame body 56 to a position that is substantially the same as the upper end of the feed case 14. Yes. By providing the large mudguard member 95 in this way, it is possible to prevent the mud splashed up by the rear wheel 2 from scattering to the upper side of the side float 21 or from the seeding device 17 or the fertilizer application device 18. it can.

  The mudguard 95 is formed so that the upper part 95A is formed in a substantially vertical shape, so that even if the mud splashed up by the rear wheel 2 is scattered, the scattered mud falls downward so that the mud mud does not adhere to the mudguard 95. It will be easy to do. Further, by providing the inclined lower portion 95B, for example, the lump of mud that has risen and accumulated by the passage of the rear wheel 2 can be pushed downward by the inclined lower portion 95B. It is possible to avoid the accumulated mud getting on the upper side of the side float 21.

As shown in FIG. 7, in a state where it is supported by a support arm 97 that is fixedly extended from the front surface of the main frame body 56 to the front side of the main frame body 56 at a position that is biased laterally to the right side with respect to the mudguard member 95. A rake member 96 is provided. The rake member 96 is formed to be wide so as to fill a gap between the center float 20 and the side float 21 so that the leveling action is performed between the center float 20 and the side float 21, and the lower end portion is a tab surface. It is the structure extended to the low position near.
Therefore, in the present embodiment, the side float 21 corresponds to a leveling float provided behind the rear wheel 2.

[Another embodiment]
(1) In the above-described embodiment, the grooving device 88 is provided in a state of being positioned in a region on the rear side in the vehicle longitudinal direction from the position of the horizontal axis (vertical swing axis) P of the side float 21. However, the configuration is not limited to such a configuration, and the groove cutter 88 is positioned in a region on the rear side in the vehicle longitudinal direction from the position of the horizontal axis P of the side float 21 and the position of the horizontal axis P of the side float 21. It is good also as a structure extendedly formed in the vehicle body front side rather than.

(2) Instead of the configuration in which the grooving device 88 is provided on the bottom surface of the side float 21, the grooving device 88 may be arranged in a state of being located on the rear side of the side float 21.

(3) The groove cutter 88 may be configured as follows.
That is, as shown in FIGS. 16 and 17, the side float 21 is formed so as to protrude downward from the bottom surface of the side float 21 and is long in the front-rear direction from the front side portion to the rear end portion of the side float 21. In this state, the side float 21 is mounted via the support member 101.

  In other words, the groove cutter 88 is integrally fixed to the lower surface side of the support member 101, and the support member 101 is attached and fixed to the side float 21. The grooving device 88 has a plate-like body in a state where the front side portion 88A has a substantially V-shaped longitudinal section, is substantially triangular in side view, and is tapered in plan view. Is formed. The rear side portion 88B is formed in a state of being integrally connected to the front side portion 88A, and extends in a substantially parallel manner along a front-rear direction through a pair of plate-like portions arranged in a substantially V shape in a front view. It is configured for. In the rear side portion 88B, a gap S is formed between the left and right plate-like portions at the lower end portion.

  The groove cutter 88 is configured such that the front side portion 88A forms a groove on the surface and the groove formed with the rear side portion 88B is held so as not to collapse. Moreover, in this embodiment, the groove cutter 88 and the covering board 30 are provided in the state which overlaps with the vehicle body front-back direction. In this configuration, the grooving device 88 and the earth covering plate 30 can satisfactorily cover the fertilizing groove.

  As shown in FIG. 16, the support member 101 is formed in a state where the front end side portion of the belt-like plate body is bent and formed in a substantially U shape in a side view so as to sandwich and hold the rear end side of the side float 21. In addition to being supported, the front end side portion is formed to be narrow and fixed to the side float 21 in a state where it is coupled to the fulcrum bracket 81 by the connecting bolt 102. Further, an engaging member 82 constituting the swing restricting mechanism 83 is integrally connected and fixed to the front portion of the support member 101.

(4) It is good also as a structure provided with the 3 or more side float 21 as a leveling float.

(5) The leveling member (rake member 96) may be provided at the same position as the mudguard member 95 in a side view of the vehicle body, or may be provided behind the mudguard member 95.

(6) The leveling member (rake member 96) may be provided with a pair of left and right in a state of being positioned on both the left and right sides of the pair of left and right rear wheels 2 in a front view of the vehicle body. Further, the leveling member is not limited to the rake member, and may be a flat leveling member, a rotationally driven leveling roller, or the like.

(7) Although the direct seeding machine is shown as an example of the paddy field work machine in the above embodiment, other types of paddy field work machines such as a rice transplanter may be used.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a paddy field work machine in which a work part is connected to the rear part of a traveling vehicle body such as a direct sowing machine or a rice transplanter.

2 Rear wheels 3 Traveling vehicle body 20 Center float 21 Side float (leveling float)
56 Front-side frame body 57 Front-facing frame body 59 Rear-side frame body 83 Oscillation regulating mechanism 88 Grooving device 95 Mudguard member 96 Leveling member A Working part D Working part frame

Claims (7)

The working part is connected to the rear part of the traveling vehicle body,
A mudguard member that prevents the mud that splashed up by the rear wheel from splashing rearward in a state of being located behind the rear wheel provided in the traveling vehicle body in the working unit, a leveling float that performs leveling of the field surface, and a field surface Paddy field work machines equipped with groovers for forming drainage grooves.   2. A leveling member for leveling the field is provided at a position rearward of the rear wheel in a side view of the vehicle body and laterally laterally with respect to the rear wheel in a front view of the vehicle body. The paddy field machine described.   The paddy field machine according to claim 2, wherein the leveling member is provided at a position biased forward of the mudguard member in a side view of the vehicle body.   The paddy field work machine according to claim 2 or 3, wherein the leveling member is provided in a state of being positioned on both the left and right sides of the rear wheel in a front view of a vehicle body. The leveling floats are respectively provided behind the pair of left and right rear wheels in the traveling vehicle body,
The paddy field work machine according to any one of claims 1 to 4, wherein a center float that is positioned at an intermediate portion of the leveling float on both the left and right sides is provided in a state of protruding forward from the leveling float. There are a plurality of front side frame bodies that are located on the front side of the working part and extend along the lateral direction of the vehicle body, and a rear side frame body that is located on the rear side of the working part and extends along the lateral direction of the vehicle body. The working part frame is configured by being connected by the front and rear frame bodies,
The paddy field work machine according to any one of claims 1 to 5, wherein the mudguard member is provided in the front-rear facing frame body. The leveling float is swingable up and down around a horizontal axis located on the rear side in the longitudinal direction of the vehicle body, and is provided in a state where the vertical swing range is restricted within a set range by a swing restriction mechanism,
The paddy field machine according to claim 6, wherein the swing restriction mechanism is provided in the front-rear frame body.

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