WO2018016312A1

WO2018016312A1 - Riding-type rice transplanter

Info

Publication number: WO2018016312A1
Application number: PCT/JP2017/024452
Authority: WO
Inventors: 修秋鹿; 芝田　哲男; 圭輔大森; 昌樹宇山
Original assignee: 三菱マヒンドラ農機株式会社
Priority date: 2016-07-20
Filing date: 2017-07-04
Publication date: 2018-01-25
Also published as: CN109475085A

Abstract

The present invention addresses the problem of realizing a well-balanced arrangement while avoiding interference between a one-row planting planter case and adjusting levers. In addition, the solution thereto is to provide a riding-type rice transplanter 1 having a structure in which a seven-row planting machine 3 is connected to the rear part of a traveling machine body 2, wherein the planting machine 3 enables seven-row planting using three two-row planting planter cases 7A and a one-row planting planter case 7B, a raking amount adjusting lever 16 and a planting depth adjusting lever 17 are disposed at one of the left and right sides with respect to the left-right center of the planting machine 3, the one-row planting planter case 7B is disposed at the other of the left and right sides with respect to the left-right center of the planting machine 3 and has planting mechanisms 8 each at one side surface part oriented toward the left-right center of the planting machine 3, and an input case 9 is mounted in a horizontal frame 5 between the mounting position of the one-row planting planter case 7B and the mounting position of a rolling shaft 13.

Description

Passenger rice transplanter

This invention relates to the riding rice transplanter comprised by connecting the planting work machine of 7 row planting to the rear part of a traveling body.

A riding rice transplanter configured by connecting a seven-planted planting machine to the rear part of a traveling machine body is known (see, for example, Patent Document 1). The 7-row riding rice transplanter has the advantage that the planting width is almost the same as the headland width and the headland can be planted in one stroke, so the amount of movement in the field is reduced and work efficiency is improved. is there.
In addition, in the planting work machine, a horizontal frame that is arranged along the left-right direction and is supported by the lifting link mechanism via a rolling shaft attached to the center of the left-right direction, and a front end portion of the horizontal frame is supported. A plurality of planter cases that are attached and arranged in parallel in the left-right direction, a seedling platform that is disposed above the plurality of planter cases, and a rear side surface portion of each planter case, The planting mechanism for scraping seedlings from the platform and planting them in the field, the input case that is attached to the left and right middle part of the horizontal frame and that inputs planting power from the traveling machine side, and the planting power that the input case inputs Some planter cases have planting transmission shafts that transmit power to each planter case. Such a unitized planting work machine has the advantage that the planter case, planting mechanism, input case, planting transmission shaft, etc. can be shared between specifications with different numbers of planting lines, and the cost can be greatly reduced. is there.

Japanese Patent Publication No. 63-60965

However, when trying to realize seven-row planting with a unitized planting machine, a double-planted planter case having planting mechanisms on the left and right sides of the rear part of the planter case, and one of the left and right side parts of the planter case 1 planted planter cases with planting mechanisms are mixed, and the spacing between planter cases becomes uneven, so the single planted planter case interferes with other elements placed on the planting work machine and balances. There is a possibility that a good arrangement configuration becomes difficult.

The present invention has been created in order to solve these problems in view of the above-described circumstances, and the invention of claim 1 is a seven-planted plant that is attached to the rear part of a traveling machine body via a lifting link mechanism. A riding rice transplanter configured by connecting a planting work machine, wherein the planting work machine is arranged along a left-right direction and is moved to a lifting link mechanism via a rolling shaft attached to a central part of the left-right direction. A horizontal frame supported so as to be able to roll, a plurality of planter cases whose front end portions are attached to the horizontal frame and arranged in parallel in the left-right direction, and seedlings disposed above the plurality of planter cases A platform and a planting mechanism that is provided on the rear side of each planter case, scrapes seedlings from the seedling platform and plantes them in the field, and is attached to the left and right middle parts of the horizontal frame. An input case that inputs planting power through the plant, a planting transmission shaft that transmits the planting power input by the input case to each planter case, and a scraping amount that adjusts the scraping amount of seedlings by the planting mechanism A plurality of planter cases having a planting mechanism on both the left and right sides of the rear part of the planter case; and an adjustment lever and a planting depth adjusting lever for adjusting the planting depth of the seedling by the planting mechanism A planter case, and a single-plant planter case having a planting mechanism on one of the left and right sides of the planter case, and seven planted plants by three double-plant planter cases and one single-plant planter case The scraping amount adjustment lever and the planting depth adjustment lever are arranged on either side of the right and left center of the planting work machine, and the single planting planter case is For left and right center It is arranged on either the left or right side, and has a planting mechanism on one side that faces the left and right center of the planting machine. The input case has a single frame planter case mounting position and a rolling shaft on the horizontal frame. It is characterized in that it is mounted between the mounting position of
A second aspect of the present invention is the riding rice transplanter according to the first aspect, wherein a plurality of vertically swingable plurality of plants arranged at intervals in the left-right direction and leveling the planting position in front of the planting mechanism. The single-planted planter case includes a float, the two-planted planter case arranged in the middle of the two double-planted planter cases arranged in the left-right direction, and a double-planted planter case arranged on one side thereof The float is provided corresponding to the three double-planted planter cases, and each of the three first floats and the single single-planted planter case is arranged to level the planting position for the two filaments. The first float and the second float that are arranged in the middle of the first floats that are provided correspondingly and that are arranged in the left-right direction. , Rocking together with a gap Together are linked, characterized in that it is used as a sensing float for sensing a height relative field surface of the planting working machine on the basis of the vertical swing.
The invention according to claim 3 is the riding rice transplanter according to claim 2, wherein the first float and the second float have a warped shape that becomes higher toward the front end side, and among the first floats arranged in the left-right direction The upper and lower ends of the first float and the second float arranged in the middle are connected to each other via a connecting member, and the connecting member is connected to the work machine lifting mechanism on the traveling machine body side via a link mechanism. It is characterized by being.

According to the invention of claim 1, since the single planting planter case and the adjusting levers (scraping amount adjusting lever and planting depth adjusting lever) are arranged in the left and right directions, the single planting planter case and the adjusting lever are arranged. A well-balanced arrangement configuration is possible while avoiding interference with other types. The single-plant planter case has a planting mechanism on one side surface facing the left and right center of the planting machine, and the input case has a single-plant planter case mounting position and a rolling shaft mounting position on the horizontal frame. As a result, it is possible not only to avoid interference between the single planter planter case and the input case, but also to make the input case as close as possible to the rolling shaft and change the bending angle of the universal joint accompanying the rolling of the planting machine Can be suppressed.
According to the invention of claim 2, since the sensing float is configured by connecting the first float leveling the planting position for two strips and the second float leveling the planting position for one strip, A large center float that is integrally molded so as to perform leveling for three strips is not required, and the manufacturing cost of the float can be reduced. Moreover, since a gap is provided between the first float and the second float, it is possible to promote the flow of muddy water and reduce the mud push to improve the detection accuracy.
According to the invention of claim 3, the first float and the second float have a warped shape that becomes higher toward the front end side, and the first float arranged in the middle of the first floats arranged in the left-right direction. Since the upper end portions on the front end side are connected to each other via the connecting member, the muddy water can flow through the gap between the floats without being blocked by the connecting member. In addition, since the connecting member is connected to the work machine lifting mechanism on the traveling machine body side via the link mechanism, it is possible to averagely sense the vertical movement of the first float and the second float.

It is a top view of the riding rice transplanter which concerns on 1st Embodiment of this invention. It is a rear view of the planting work machine which concerns on 1st Embodiment of this invention. It is a front view of the planting work machine concerning a 1st embodiment of the present invention. It is a principal part top view which shows arrangement | positioning of the planter case and planting mechanism of the planting work machine which concern on 1st Embodiment of this invention. It is a principal part bottom view which shows arrangement | positioning of the planter case and planting mechanism of the planting work machine which concern on 1st Embodiment of this invention. It is a principal part perspective view which shows arrangement | positioning of the float of the planting work machine which concerns on 1st Embodiment of this invention, and a wheel mark erasing apparatus. It is a principal part bottom view which shows arrangement | positioning of the float of the planting work machine which concerns on 1st Embodiment of this invention, and a wheel mark erasing apparatus. It is a principal part side view which shows the attachment structure of the wheel mark erasing apparatus of the planting work machine which concerns on 1st Embodiment of this invention. It is the perspective view which looked at the wheel mark erasing device concerning a 1st embodiment of the present invention from the front. It is the perspective view which looked at the wheel mark erasing device concerning a 1st embodiment of the present invention from back. It is a principal part perspective view which shows the attachment structure of the fertilizer application nozzle of the planting work machine which concerns on 1st Embodiment of this invention. It is a principal part side view which shows the attachment structure of the nozzle for deep layer fertilization with respect to the 2 row planting planter case of the planting work machine which concerns on 1st Embodiment of this invention. It is a principal part side view which shows the attachment structure of the nozzle for deep layer fertilization with respect to the single row planting planter case of the planting work machine which concerns on 1st Embodiment of this invention. It is a side view of the riding rice transplanter which concerns on 2nd Embodiment of this invention. It is a bottom view of the planting work machine which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the float and wheel mark erasing apparatus of the planting work machine which concern on 2nd Embodiment of this invention. It is a perspective view which shows the sensing float of the planting work machine which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the wiring of the sensing link mechanism which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a passenger rice transplanter 1 according to a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, 1 is a riding rice transplanter, and the riding rice transplanter 1 is provided with a seven-row planting work machine 3 at the rear part of the traveling machine body 2 via a lifting link mechanism (see reference numeral 51 in FIG. 14). Concatenated. The traveling machine body 2 includes a planting PTO shaft (not shown) that outputs planting power, and the power output from the traveling machine body 2 can be flexibly planted with a universal joint (not shown). It is transmitted to the planting work machine 3 via a shaft (see reference numeral 52 in FIG. 14).

As shown in FIGS. 2 to 13, the planting work machine 3 includes a horizontal frame 5, a seedling stage 6,

planter cases

7A and 7B, a planting mechanism 8, an input case 9, a planting transmission shaft 10, a lateral feed speed change. A mechanism 11, a lateral feed shaft 12 and the like are provided. The horizontal frame 5 is a square cylindrical frame member disposed in the left-right direction on the planting work machine 3, and the rear end portion of the lifting link mechanism via a rolling shaft 13 protruding forward from the left-right center position. It is supported by the right and left rolling freely.

The seedling mounting table 6 has a seedling mounting surface that is inclined in a low shape before and after the front height, and is slidably disposed above and below the

planter cases

7A and 7B, and in the left-right direction according to the rotation of the lateral feed shaft 12. Horizontally fed. In addition, the seedling stage 6 is provided with a vertical feeding mechanism 14 that feeds the mat seedlings on the seedling mounting surface downward at the position where the lateral feeding is turned back.

The

planter cases

7A and 7B are arranged in parallel with a space in the left-right direction, and the front end is integrally supported by the horizontal frame 5. The planting mechanism 8 is provided on the rear side surface part of the

planter cases

7A and 7B, scrapes the seedlings on the seedling placing stand 6 and plantes them in the field. More specifically, an apron 15 that functions as a lower limit stopper for the mat seedling placed on the seedling table 6 is disposed at the lower end of the seedling table 6, and the planting mechanism 8 is attached to the apron 15. The seedling is scraped off from the lower end portion of the mat seedling placed on the seedling placing stand 6 through the formed scraping port (see reference numeral 15a in FIG. 18).

The apron 15 can be changed in the vertical position, and the amount of seedling scraped by the planting mechanism 8 is adjusted based on the change in the vertical position. Specifically, when the position of the apron 15 is changed to the lower side, the amount of seedling scraped by the planting mechanism 8 increases, while when the position of the apron 15 is changed to the upper side, the seedling scraped by the planting mechanism 8 is scraped. The amount decreases. The planting work machine 3 is provided with a scraping amount adjusting lever 16 extending across the horizontal frame 5 and extending forward and forward. From the traveling machine body 2 side in a state where the planting work machine 3 is raised. When the scraping amount adjusting lever 16 is operated, the vertical position of the apron 15 is changed, and the scraping amount of the seedling by the planting mechanism 8 is adjusted.

Further, the planting work machine 3 is provided with a planting depth adjusting lever 17 for adjusting the planting depth of the seedling by the planting mechanism 8. The planting depth adjusting lever 17 is extended upward and forward across the horizontal frame 5 in the same manner as the scraping amount adjusting lever 16, and the planting work machine 3 is lifted up to the traveling machine body 2 side. When the planting depth adjustment lever 17 is operated from above, the vertical positions of the

floats

18 and 19 arranged below the planter case 7 are changed, and the planting depth of the seedling by the planting mechanism 8 is adjusted accordingly. .

The input case 9 is attached to the left and right middle part of the horizontal frame 5 and inputs power from the traveling machine body 2 side. As described above, the input shaft 9a of the input case 9 is connected to the planting PTO shaft on the traveling machine body 2 side via the flexible transmission shaft with the universal joint interposed therebetween. Considering the change in the bending angle of the universal joint, it is desirable that the mounting position of the input case 9 with respect to the horizontal frame 5 be as close as possible to the rolling shaft 13.

The planting transmission shaft 10 is arranged in parallel below the rear side of the horizontal frame 5, and transmits the power input by the input case 9 to the planter cases 7 A and 7 B and the lateral feed transmission mechanism 11. The lateral feed speed change mechanism 11 is a speed change mechanism interposed in the power transmission path to the lateral feed shaft 12, and the lateral feed speed of the seedling stage 6 can be adjusted by shifting the rotational speed of the lateral feed shaft 12. The transverse feed shaft 12 is a screw shaft having an endless helical groove on the outer periphery, and a transverse feed body 12a that reciprocates left and right on the shaft according to its rotation is provided, and a seedling is provided via the transverse feed body 12a. The platform 6 is laterally fed.

Next, an arrangement configuration of the

planter cases

7A, 7B and the like in the planting work machine 3 will be described mainly with reference to FIGS.

The plurality of

planter cases

7A and 7B include a double-planted planter case 7A having planting mechanisms 8 on both left and right sides of the planter case 7A, and a planting mechanism 8 on either one of the left and right sides of the planter case 7B. A single-planted planter case 7B is included, and the seven-planted planter 3 is composed of a combination of three double-planted planter cases 7A and one single-planted planter case 7B. . In the planting work machine 3 configured as described above, the spacing between the

planter cases

7A and 7B becomes uneven, so that the single planting planter case 7B has the scraping amount adjusting lever 16 and the planting depth adjusting lever 17. Interfering with the input case 9 or the like may make it difficult to achieve a well-balanced arrangement configuration.

Therefore, in the planting work machine 3 according to the present embodiment, the scraping amount adjustment lever 16 and the planting depth adjustment lever 17 are arranged on either the left or right side with respect to the left-right center (rolling shaft 13) of the planting work machine 3. The single-planted planter case 7B is arranged on either the left or right side of the right and left center of the planting work machine 3. In this way, the single planting planter case 7B and the adjusting levers (the scraping amount adjusting lever 16 and the planting depth adjusting lever 17) are arranged so as to be laterally distributed with respect to the left and right center of the planting work machine 3. Therefore, a well-balanced arrangement configuration is possible while avoiding interference between the single-planted planter case 7B and the adjusting levers.

As shown in FIG. 4, in the planting work machine 3 of the present embodiment, two double-planting planter cases 7 A are arranged on one side with respect to the left and right center of the planting work machine 3, and the planting work machine 3. One double-planted planter case 7A and one single-planted planter case 7B are arranged on the other side with respect to the left and right center of each. In other words, the double-planted planter case 7A is arranged on the left and right outer sides of the planting work machine 3, and the double-planted planter case 7A and the single-planted planter case 7B are arranged on the left and right inner sides of the planting work machine 3.

In the planting work machine 3 according to the present embodiment, when the single planting planter case 7B is arranged on either the left or right side with respect to the left and right center of the planting working machine 3, one side surface portion of the single planting planter case 7B is disposed. The planting mechanism 8 is arranged on the side surface facing the left and right center side of the planting machine 3. In this way, the mounting position of the input case 9 can be secured between the mounting position of the single-planted planter case 7B and the mounting position of the rolling shaft 13 in the horizontal frame 5, so that the single-planted planter case 7B and the input case 9 are secured. The input case 9 can be brought as close to the rolling shaft 13 as possible, and the change in the bending angle of the universal joint accompanying the rolling of the planting work machine 3 can be suppressed.

Next, the

floats

18 and 19 and the wheel mark erasing device 20 provided in the planting work machine 3 will be described mainly with reference to FIGS.

The floats 18 and 19 include a center float 18 for leveling the planting positions for the central three strips and left and right side floats 19 for leveling the planting positions for the two outer strips. The center float 18 and the side float 19 level the planting position by sliding on the paddy field while swinging up and down with the swinging

support shafts

18a and 19a as fulcrums. The center float 18 also functions as a sensing float that senses the height of the planting machine 3 relative to the rice field. That is, the center float 18 is connected to a hydraulic lift mechanism (not shown) on the traveling machine body 2 side via a connection mechanism (not shown), and the hydraulic lift mechanism is planted according to the vertical movement of the center float 18. By automatically raising and lowering 3, the height of the planting work machine 3 with respect to the rice field is kept substantially constant.

The planting work machine 3 is provided with a planting depth adjusting mechanism 21 that changes the vertical position of the center float 18 and the side float 19 according to the operation of the planting depth adjusting lever 17 described above. The planting depth adjusting mechanism 21 includes a rotatable float connecting shaft 22 disposed along the left-right direction below the plurality of

planter cases

7A, 7B, and a float connecting shaft 22 spaced in the left-right direction. A plurality of float support arms 23 extending rearward and downward, and the center float 18 and the side float 19 are connected to the tip of each float support arm 23 through

swing support shafts

18a and 19a so as to be swingable up and down. The float coupling shaft 22 can be rotated, and the planting depth of the seedling by the planting mechanism 8 can be adjusted based on the vertical position change of the center float 18 and the side float 19 according to the rotation of the float coupling shaft 22. The above-mentioned planting depth adjustment lever 17 to adjust is provided.

The planting work machine 3 is provided with left and right wheel mark erasing devices 20 for erasing wheel marks of the traveling machine body 2 (travel marks of the rear wheel 2a). The left and right wheel mark erasing devices 20 are arranged behind the rear wheel 2 a and between the center float 18 and the side float 19 and slide on the surface while swinging up and down like the center float 18 and the side float 19. To level the wheel marks.

The wheel mark erasing device 20 of the present embodiment includes a leveling plate 24 that erases wheel marks, a support bracket 25 that supports the leveling plate 24, a support bracket 25 that can swing up and down, and a planting depth adjustment lever. 17 includes a parallel link mechanism 26 that changes the vertical position of the leveling plate 24 according to the rotation operation of the float coupling shaft 22 by 17 and a pressing force adjustment mechanism 30 that adjusts the pressing force of the leveling plate 24 against the paddy surface.

According to such a wheel mark erasing device 20, the parallel link mechanism 26 that changes the vertical position of the leveling plate 24 according to the rotation operation of the float connecting shaft 22 by the planting depth adjusting lever 17 is provided. Even if no vertical position adjusting mechanism is provided, the leveling plate 24 can be adjusted to an appropriate vertical position while maintaining the basic posture of the leveling plate 24. Moreover, by providing the pressing force adjusting mechanism 30 that adjusts the pressing force of the leveling plate 24 against the paddy surface, a good wheel mark erasing function can be exhibited based on the pressing force adjustment according to the field conditions. Hereinafter, each part of the wheel mark erasing device 20 will be described in detail.

The leveling plate 24 includes an attachment portion 24a attached to the support bracket 25, an inclined plate portion 24b extending rearward and downward from the lower end of the attachment portion 24a, and a bottom plate portion 24c extending rearward from the lower end of the inclined plate portion 24b. , And a muddy water guide portion 24d extending forward from the left and right ends of the attachment portion 24a and the inclined plate portion 24b. According to the leveling plate 24 as described above, not only the wheel traces can be leveled by the inclined plate portion 24b and the bottom plate portion 24c, but also muddy water existing in front of the center float 18 and the side float 19 is actively received by the muddy water guide portion 24d. By collecting in the leveling plate 24, mud pushing by the center float 18 and the side float 19 and the accompanying fluttering of the center float 18 and the side float 19 can be suppressed.

Furthermore, the leveling plate 24 is formed with a notch 24e for allowing the collected muddy water to escape. Specifically, a plurality of notches 24e extending in the front-rear direction from the inclined plate portion 24b to the bottom plate portion 24c are formed at predetermined intervals in the left-right direction. According to such a leveling plate 24, mud pushing and fluttering of the leveling plate 24 can be suppressed by allowing the collected muddy water to escape from the notch 24e.

The support bracket 25 includes a link connecting portion 25a connected to the parallel link mechanism 26, and a leveling plate support portion 25b extending forward from the link connecting portion 25a and supporting the leveling plate 24 at the tip thereof. The ground plate 24 is detachably attached to the leveling plate support portion 25b of the support bracket 25 via bolts B. According to the mounting structure of the leveling plate 24 as described above, replacement with the leveling plate 24 having a different shape according to the specification and the field conditions is facilitated.

The parallel link mechanism 26 extends rearward and downward from the float coupling shaft 22, and has a lower link 27 that supports the support bracket 25 so that the support bracket 25 can swing up and down at its tip, and a swing range of the support bracket 25 at the rear end. And an upper link 28 to be defined. That is, since the front end portion of the lower link 27 that is a component of the parallel link mechanism 26 is integrally connected to the float connecting shaft 22, it corresponds to the turning operation of the float connecting shaft 22 by the planting depth adjusting lever 17. Thus, the vertical position of the leveling plate 24 can be changed.

The rear end portion of the upper link 28 is connected to a connection hole 25c formed in the support bracket 25 via a pin 28a. The connecting hole 25c is an arc-shaped long hole centered on the swing support shaft 25d of the support bracket 25, and the support bracket 25 is allowed to swing within the range. On the other hand, the front end portion of the upper link 28 is supported by the

planter cases

7A and 7B or the horizontal frame 5 via a support shaft 28b so as to be swingable up and down. For example, in the present embodiment, the front end portion of the upper link 28 provided in the right wheel mark erasing device 20 is supported by the support shaft 28b protruding from the side surface of the single-plant planter case 7B so as to be swingable up and down. The front end portion of the upper link 28 provided in the wheel mark erasing device 20 is supported by an extension bracket 29 extending rearward from the horizontal frame 5 so as to be vertically swingable.

The pressing force adjusting mechanism 30 has one end locked to the support bracket 25 and the other end locked to the lower link 27, whereby a torsion coil spring 30a for biasing the support bracket 25 downward, and the support bracket And a plurality of locking grooves 25e that can selectively lock one end of the torsion coil spring 30a. According to such a pressing force adjusting mechanism 30, it is possible to adjust the pressing force of the leveling plate 24 against the surface by selectively changing the locking groove 25e that locks one end of the torsion coil spring 30a. Become.

Next, the

fertilizer application nozzles

31A, 31B, 32A, and 32B provided in the planting work machine 3 will be described mainly with reference to FIGS.

The planting work machine 3 includes a plurality of side

fertilizer application nozzles

31A and 31B that discharge paste fertilizer into the soil near the side of each planting position, and a side fertilizer application nozzle 31A between adjacent planting positions. , 31B and a plurality of deep

layer fertilizer nozzles

32A and 32B for discharging paste fertilizer at a deeper layer than 31B are provided, and side row fertilization and deep layer fertilization can be performed simultaneously with planting of seedlings.

However, in the seven-plant planting work machine 3, the two-plant planter case 7B having the planting mechanisms 8 on the left and right sides of the rear part of the planter case 7A and the left and right side parts of the rear part of the planter case 7A are planted. Since the single planting planter case 7B having the mechanism 8 is mixed and the spacing between the

planter cases

7A and 7B becomes uneven, it is difficult to arrange the side

fertilizer application nozzles

31A and 31B and the deep

fertilizer application nozzles

32A and 32B. In addition, there is a risk that the amount of fertilization will be excessive or insufficient.

In this embodiment, when the side row fertilizer application nozzles 31 A and 31 B and the deep layer fertilizer application nozzles 32 A and 32 B are arranged on the seven-plant planting work machine 3, In the attachment position, the seedling mechanism 8 of the two-planted planter case 7A and the single-planted planter case 7B is planted with three seedlings, and the planting position for the two outer strips leveled by the left and right side floats 19 Shall plant two seedlings by the planting mechanism 8 of the two-plant planter case 7A.

Further, the side-row fertilizer application nozzle 31A provided corresponding to the planting mechanism 8 of the double-planted planter case 7A is integrated with the two filaments, and the center float 18 is arranged immediately below the double-planted planter case 7A. Or it is provided in the side float 19 (refer FIG. 6). The center float 18 and the side float 19 include a cylindrical nozzle support tube 33A extending in the left-right direction, and a nozzle connection shaft 34A that is rotatably inserted into the nozzle support tube 33A. Side fertilizer application nozzles 31A are attached to both ends. Further, a fertilization depth adjusting mechanism 35A for adjusting the fertilization depth (including storage) of the side strip fertilization nozzle 31A is provided at one end of the nozzle support cylinder 33A.

The deep fertilizer application nozzle 32A provided corresponding to the planting mechanism 8 of the double-planted planter case 7A is provided at the left and right central portions of the double-planted planter case 7A. At the front end of the double-planted planter case 7A, a bracket 36A having a U-shape in plan view and a nozzle support shaft 37A that is rotatably supported by the bracket 36A in the left-right direction are provided. A deep layer fertilizer nozzle 32A is attached to the center of the support shaft 37A. Further, a fertilization depth adjustment mechanism 38A for adjusting the fertilization depth (including storage) of the deep layer fertilization nozzle 32A is provided between the nozzle support shaft 37A and one side surface of the double-planting planter case 7A. ing.

On the other hand, the deep fertilizer application nozzle 31B provided corresponding to the planting mechanism 8 of the single-plant planter case 7B is offset from the left and right center of the single-plant planter case 7B to the planting mechanism 8 side. At the front end of the single planter planter case 7B, a bracket 36B having a U-shape in plan view and a nozzle support shaft 37B that is rotatably supported by the bracket 36B in the left-right direction are provided. A deep fertilizer application nozzle 32B is attached to one end of the support shaft 37B. Further, a fertilization depth adjusting mechanism 38B for adjusting the fertilization depth (including storage) of the deep layer fertilization nozzle 32B is provided between the nozzle support shaft 37B and one side surface of the single planting planter case 7B. ing.

The side-row fertilizer application nozzle 31B provided corresponding to the planting mechanism 8 of the single-plant planter case 7A is located on the opposite side of the deep-layer fertilization nozzle 32B across the planting mechanism 8 in the left-right direction, and the center float 18 (Or side float 19) (see FIG. 6). The center float 18 includes a cylindrical nozzle support tube 33B extending in the left-right direction, and a nozzle connection shaft (not shown) that is rotatably inserted into the nozzle support tube 33B, and has one end of the nozzle connection shaft. A side fertilizer application nozzle 31B is attached to the part. Moreover, the fertilization depth adjustment mechanism 35B for adjusting the fertilization depth (including storage) of the nozzle 31B for side strip fertilization is provided in the one end part of the nozzle support cylinder 33B.

According to the arrangement of the

fertilizer application nozzles

31A, 31B, 32A, 32B as described above, the deep fertilizer application nozzle 32B provided corresponding to the planting mechanism 8 of the single-plant planter case 7B is a single-plant planter case. 7B is offset from the center of the left and right to the planting mechanism 8 side, so that efficient deep layer fertilization can be performed in the single-plant planter case 7B.

Further, since the side-row fertilizer application nozzle 31B provided corresponding to the planting mechanism 8 of the single-plant planter case 7B is located on the opposite side of the deep-layer fertilization nozzle 32B across the planting mechanism 8 in the left-right direction, Interference with the offset deep fertilizer application nozzle 32B can be avoided.

Further, the deep layer fertilizer nozzle 32B corresponding to the single-plant planter case 7B is provided in the planter case 7B similarly to the deep-layer fertilizer nozzle 32A corresponding to the double-plant planter case 7A, and corresponds to the single-plant planter case 7B. The side row fertilizer application nozzle 31B is provided in the center float 18 or the side float 19 in the same manner as the side row fertilizer application nozzle 31A corresponding to the double-planted planter case 7A. Therefore, the deep layer fertilizer corresponding to the single-planted planter case 7A is provided. It becomes possible to share many parts between the nozzle 32A for side use and the nozzle 31A for side row fertilization, and the nozzle 32B for deep layer fertilization and the nozzle 31B for side row fertilization corresponding to the double-planted planter case 7B. .

The amount of fertilizer discharged from the deep-layer fertilizer nozzle 32B provided corresponding to the single-plant planter case 7B is suppressed more than the amount of fertilizer discharged from the deep-layer fertilizer nozzle 32A provided corresponding to the double-planted planter case 7A. Is preferred. That is, the deep layer fertilizer nozzle 32A provided corresponding to the two-plant planter case 7A performs deep layer fertilization for two strips, whereas the deep-layer fertilizer nozzle 32B provided corresponding to the single-plant planter case 7B. Since the deep layer fertilization is performed for one line, the fertilizer discharge amount of the deep layer fertilizer nozzle 32B provided corresponding to the single line planter case 7B is provided corresponding to the double line planter case 7A. By suppressing the amount of fertilizer discharged from the deep layer fertilizer nozzle 32A, excessive deep layer fertilization on seedlings planted in the single-plant planter case 7B can be avoided.

According to the present embodiment configured as described above, a riding rice transplanter 1 configured by connecting a seven-planted planting work machine 3 to the rear part of a traveling machine body 2 via a lifting link mechanism, The attached work machine 3 is disposed along the left-right direction, and is supported by the lifting link mechanism via a rolling shaft 13 attached to the center of the left-right direction so as to be able to roll left and right. A plurality of

planter cases

7A and 7B that are attached and arranged in parallel in the left-right direction, a seedling mounting base 6 that is disposed above the plurality of

planter cases

7A and 7B, and each

planter case

7A, 7B provided on the rear side surface, scraped seedlings from the seedling stage 6 and planted in the field, and attached to the left and right middle part of the horizontal frame 5, from the traveling machine body 2 side through the universal joint planting Input case 9 for inputting force, planting transmission shaft 10 for transmitting planting power input by the input case 9 to each

planter case

7A, 7B, and scraping for adjusting the amount of seedling scraped by the planting mechanism 8 A plurality of

planter cases

7A and 7B on the left and right side surfaces of the rear part of the planter case 7A. Three double-planted planter cases including a double-planted planter case 7A having a planting mechanism 8 and a single-planted planter case 7B having a planting mechanism 8 on either one of the left and right sides of the rear side of the planter case 7B 7A and one single-planting planter case 7B enable seven-row planting, and the scraping amount adjusting lever 16 and the planting depth adjusting lever 17 are either left or right with respect to the left-right center of the planting work machine 3. To the side The single-planted planter case 7B is arranged on either the left or right side of the right and left center of the planting work machine 3 and is planted on one side surface facing the left and right center side of the planting work machine 3. The input case 9 is mounted between the mounting position of the single-planted planter case 7B and the mounting position of the rolling shaft 13 in the horizontal frame 5, so that the single-planted planter case 7B and adjusting levers ( 16, 17) and avoiding interference with the single-plant planter case 7 B and the input case 9 while avoiding interference with the rolling shaft 13 while avoiding interference with the input shaft 9. As close as possible, the bending angle change of the universal joint accompanying the rolling of the planting work machine 3 can be suppressed.

[Second Embodiment]
Next, a riding rice transplanter 1B according to a second embodiment of the present invention will be described with reference to FIGS. However, only the parts different from the first embodiment will be described, and the same symbols as those in the first embodiment are used for the parts common to the first embodiment, and the description of the first embodiment is incorporated.

As shown in FIG. 14 to FIG. 18, the riding rice transplanter 1B according to the second embodiment is different from the first embodiment in that the configuration of the

floats

61A and 61B and the leveling device 70 are provided.

As shown in FIGS. 15 and 16, the floats 61 A and 61 B are provided corresponding to the three double-planting planter cases 7 A, and each of the three first floats 61 A for leveling the planting positions for the two strips. One second float 61B provided corresponding to one single-planting planter case 7B and leveling the planting position for one row is included. The

floats

61A and 61B level the planting position by sliding on the paddy field while swinging up and down with the swing support shaft 61s (see FIG. 17) as a fulcrum.

Predetermined floats 61A and 61B located in the middle in the left-right direction also function as a sensing float F that senses the height of the planting work machine 3B with respect to the rice field. The sensing float F is connected to a hydraulic lifting mechanism (not shown) on the traveling machine body 2 side via a sensing link mechanism 62 (link mechanism) shown in FIG. By automatically raising and lowering the planting work machine 3B according to the movement, the height of the planting work machine 4 with respect to the rice field is kept substantially constant.

As shown in FIGS. 14 and 15, the leveling device 70 is for leveling in front of the floats 61 A and 61 B, and is transmitted from the rear axle case 2 b of the traveling machine body 2 via the leveling power transmission shaft 71. An input case 72 for inputting leveling power, a rotor shaft 73 extending from the input case 72 to the left and right sides, a plurality of leveling rotors 74 provided so as to be integrally rotatable with the rotor shaft 73, and components thereof And a support frame 75 supported on the front portion of the planting work machine 3B.

When leveling power is input to the input case 72, the leveling rotor 74 performs leveling in front of the

floats

61A and 61B as the rotor shaft 73 and leveling rotor 74 rotate integrally. There is a non-leveling area S1 where the leveling rotor 74 is not provided in order to avoid interference with the planting power transmission shaft 52 when the planting work machine 3B is raised.

Next, the

floats

61A and 61B, which are the main parts of the second embodiment, will be described in detail.

The first float 61A has a T-shape in which left and right leveling portions 61a that level the planting position for two strips are formed to extend from the front end side to the left and right sides. The first float 61A is formed with a thin portion 61b for avoiding contact with the double-planted planter case 7A, and a thin portion 61c for attaching brackets on the upper surface side and flowing muddy water backward on the lower surface side. However, a leveling portion 61d that is slightly thicker is formed on the lower surface side rear end portion of the thin portion 61c in order to eliminate the float mark.

The second float 61B has an inverted L shape in which a leveling portion 61e that levels the planting position for one strip extends from the front end to one side. On the second float 61B, brackets are attached on the upper surface side, and a thin portion 61f for flowing muddy water backward is formed on the lower surface side, but the lower surface side rear end of the thin portion 61f has a float on the lower surface side. A leveling portion 61g that is slightly thicker is formed to erase the trace.

Among the three first floats 61A arranged in the left-right direction, the second float 61B is disposed between the first float 61A disposed in the middle and the first float 61A disposed on one side thereof. The first float 61A and the second float 61B arranged in the middle are connected so as to be capable of swinging together with the gap S2 interposed therebetween, so that the planting work machine 3B can move relative to the surface of the planting work machine 3B based on the vertical swing. A sensing float F for sensing the height is constructed.

That is, the sensing float F is configured by connecting the first float 61A for leveling the planting position for two strips and the second float 61B for leveling the planting position for one strip. A large center float that is integrally molded to level the ground is unnecessary, and the manufacturing cost of the float can be reduced. In addition, since the gap S2 is provided between the first float 61A and the second float 61B, the flow of muddy water can be promoted and the mud push can be reduced to improve the sensing accuracy.

Further, the first float 61A and the second float 61B have a warped shape that becomes higher toward the front end side, and the first float 61A and the second float 61B that constitute the sensing float F are located at the upper end portions on the front end side. Are connected via a connecting member 63. More specifically, the front end portions of the first float 61A and the second float 61B each have a pair of left and right mounting holes (not shown), and bolts 64 welded to the connecting member 63 in these mounting holes. The front end portions of the first float 61A and the second float 61B are integrally connected through the connecting member 63 by tightening nuts (not shown) that are inserted from above and screwed into these bolts 64 from below. Is done. According to such a connection structure, since the connection member 63 can be disposed at a high level, the muddy water can flow into the gap S2 between the

floats

61A and 61B without being obstructed by the connection member 63.

Further, a connecting plate 65 connected to the sensing link mechanism 62 is welded to the intermediate portion of the connecting member 63 in the left-right direction. Since the connecting plate 65 is located above the gap S2 between the

floats

61A and 61B, it is possible to averagely sense the vertical movement of the first float 61A and the second float 61B.

Further, the gap S2 between the

floats

61A and 61B overlaps with the non-leveling area S1 of the leveling device 70 in the left-right direction. As a result, the muddy water flowing from the non-leveling area S1 of the leveling device 70 toward the

floats

61A and 61B is allowed to escape straight back as it is, and the movement of the sensing float F can be further stabilized.

According to the second embodiment configured as described, the sensing float F includes a first float 61A for leveling the planting position for two strips and a second float 61B for leveling the planting position for one strip. Since it connects and comprises, the large-sized center float integrally molded so that the ground preparation for 3 strips may be made unnecessary, and the manufacturing cost of

float

61A, 61B can be reduced.

Also, since the gap S2 is provided between the first float 61A and the second float 61B, it is possible to promote the flow of muddy water and reduce the mud push to improve the sensing accuracy.

Further, the first float 61A and the second float 61B have a warped shape that becomes higher toward the front end side, and the first float 61A and the second float 61B arranged in the middle of the first floats 61A arranged in the left-right direction. Means that the upper end portions on the front end side are connected to each other via the connecting member 63, so that the muddy water can flow into the gap S 2 between the floats 61 A and 61 B without being blocked by the connecting member 63.

In addition, since the connecting member 63 is connected to the work machine lifting mechanism on the traveling machine body 2 side via the sensing link mechanism 62, the vertical movement of the first float 61A and the second float 61B can be sensed on average. .

DESCRIPTION OF SYMBOLS 1, 1B Riding rice transplanter 2 Traveling

machine body

3, 3B Planting work machine 5 Horizontal frame 6 Seedling stand 7A Two-plant planter case 7B Single-plant planter case 8 Planting mechanism 10 Planting transmission shaft 13 Rolling shaft 16 Scraping Volume adjustment lever 17 Planting depth adjustment lever 18 Center float 19 Side float 20 Wheel mark erasing device 22 Float connection shaft 23 Float support arm 24 Leveling plate 24d Mud guide part 24e Notch part 25 Support bracket 26 Parallel link mechanism 30

Pressure Adjustment mechanism

31A, 31B Side-row

fertilizer application nozzle

32A, 32B Deep layer fertilization nozzle

61A First float

61B Second float 62 Sensing link mechanism 63 Connecting member 65 Connecting plate 70 Leveling device F Sensing float S1 Non-leveling area S
S2 gap

Claims

A riding rice transplanter configured by connecting a seven-planted planting work machine to the rear part of the traveling machine body via a lifting link mechanism,
The planting machine is
A horizontal frame that is arranged along the left-right direction and is supported by the lifting link mechanism via a rolling shaft attached to the center of the left-right direction so that it can roll left and right.
A plurality of planter cases whose front ends are attached to the horizontal frame and arranged in parallel in the left-right direction;
A seedling stand placed above a plurality of planter cases;
A planting mechanism provided on the rear side surface of each planter case, scraping seedlings from a seedling stand and planting them in a field;
An input case that is attached to the left and right middle part of the horizontal frame and inputs planting power from the traveling machine body via a universal joint;
A planting transmission shaft for transmitting planting power input by the input case to each planter case;
A scraping amount adjusting lever for adjusting the scraping amount of the seedling by the planting mechanism;
A planting depth adjusting lever for adjusting the planting depth of the seedling by the planting mechanism,
The plurality of planter cases includes a two-plant planter case having a planting mechanism on the left and right sides of the planter case, and a single planter planter case having a planting mechanism on one of the left and right sides of the planter case. Including seven double-planted planter cases and one single-planted planter case, enabling seven-row planting,
The scraping amount adjustment lever and the planting depth adjustment lever are arranged on either the left or right side with respect to the left and right center of the planting work machine,
The single planting planter case is arranged on either the left or right side of the right and left center of the planting work machine, and has a planting mechanism on one side surface facing the left and right center side of the planting work machine,
The riding case transplanter characterized in that the input case is attached between the attachment position of the single-plant planter case and the attachment position of the rolling shaft in the horizontal frame.
A plurality of floats that are arranged in the left-right direction with an interval and can swing up and down to level the planting position in front of the planting mechanism,
The single-planted planter case is arranged between the two-planted planter case arranged in the middle of the two double-planted planter cases arranged in the left-right direction and the two-planted planter case arranged on one side thereof. And
Float
Three first floats provided corresponding to the three two-planted planter cases, each leveling the planting position for two strips;
One second float that is provided corresponding to one single planting planter case and leveling the planting position for one row, and
Among the first floats arranged in the left-right direction, the first float and the second float arranged in the middle are connected so as to be able to swing together with a gap therebetween, and are planted based on the vertical swing. The riding rice transplanter according to claim 1, wherein the riding rice transplanter is used as a sensing float that senses a height of the work machine relative to the rice field.
The first float and the second float have a warped shape that becomes higher toward the front end side,
Among the first floats arranged in the left-right direction, the first float and the second float arranged in the middle are connected to each other at the front end side via a connecting member, and the connecting member travels via a link mechanism. The riding rice transplanter according to claim 2, wherein the riding rice transplanter is connected to a work machine lifting mechanism on a machine body side.