JP2017063681A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter capable of avoiding a chemical scattering device from being an obstacle when a seedling placement base is brought into a storage state.SOLUTION: A seedling placement base 22 may change a state between a work state where a main seedling base 42 and a subsidiary seedling base 41 are connected side by side in a right/left direction, a storage state D2 where the subsidiary seedling base 41 is separated from the main seedling base 42 and a right/left width is reduced compared to the work state. A chemical scattering device A1 on the subsidiary seedling base side may change a position from a use position corresponding to the work state to a retreat position E2 separated to a right/left center C side of the seedling placement base 22 from the use position corresponding to the work state compared to the use position.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a rice transplanter.

  A conventional rice transplanter is described in Patent Document 1, for example. This rice transplanter has a seedling stand, a main seedling stand (in the same document, “main seedling part”), and an end portion in the left-right direction of the main seedling stand. A movable auxiliary seedling stage (in the same document, “subseed seedling part”) is provided. This seedling stage has a working state in which the main seedling stage and the auxiliary seedling stage are connected side by side in the left-right direction, and the auxiliary seedling stage is separated from the main seedling stage and the lateral width is reduced compared to the working state. The state can be changed between the stored state and the stored state.

JP 2013-208099 A

  By the way, some rice transplanters are configured to be able to disperse medicines in a field, and are provided with a plurality of medicine dispersers arranged in the left-right direction on the rear side of the seedling platform. However, in a rice transplanter equipped with such a chemical spraying device, as described above, when placing the seedling stand in the storage state, the chemical spraying device protrudes to the left and right outside of the stored seedling stand. There was a risk of getting in the way.

  In view of such a situation, it has been desired to provide a rice transplanter that can prevent the medicine spraying device from getting in the way when the seedling platform is stored.

The rice transplanter of the present invention
A seedling stand,
A medicine spraying device configured to spray a medicine on a field, and arranged in a plurality in the left-right direction on the rear side of the seedling platform; and
The seedling stage is provided with a main seedling stage, an auxiliary seedling stage that is located on an end side in the left-right direction of the main seedling stage and is movable with respect to the main seedling stage,
In the working state in which the seedling stage is connected to the main seedling stage and the auxiliary seedling stage side by side in the left-right direction, and the auxiliary seedling stage is separated from the main seedling stage, Is also configured to be changeable between the stowed state in which the left and right widths are reduced,
The medicine spraying device on the side seedling stage is configured such that the position can be changed from a use position corresponding to the work state to a retracted position that is further away from the use position to the left and right center side of the seedling stand. It is.

According to the present invention, when the seedling stage is changed from the working state to the stowed state in which the lateral width is reduced as compared with the working state, the medicine spraying on the auxiliary seedling stage side in the use position corresponding to the working state of the seedling stage is performed. There is a possibility that the device protrudes to the left and right outside of the seedling mount in the stored state. However, the medicine spraying device on the side of the auxiliary seedling stand is repositioned from the use position corresponding to the working state of the seedling stand to the retracted position that is farther from the use position to the left and right center side of the seedling stand. The possibility that the medicine spraying device on the mounting table protrudes to the left and right outside of the stored seedling mounting table can be suitably avoided.
Therefore, according to this invention, when putting a seedling stand into a stowed state, it can avoid that a chemical spraying apparatus becomes obstructive.

In the above configuration,
In the storage state, it is preferable that the auxiliary seedling stage and the main seedling stage are overlapped.

  According to this configuration, when the seedling stage is changed from the working state to the stowed state, the main seedling stage and the auxiliary seedling stage are overlapped, but at this time, the medicine spraying device may become an obstacle. . However, since the medicine spraying device can be repositioned from the use position corresponding to the working state of the seedling platform to the retracted position away from the left and right center side, before the seedling platform is stored, the medicine spraying device By changing the position of the apparatus to the retracted position, it is possible to prevent the medicine spraying apparatus from interfering with the operation of changing the state of the seedling platform.

In the above configuration,
A movable support frame for supporting the medicine spraying device on the side seedling stage is provided,
It is preferable that one end of the movable support frame on the side of the main seedling stand is supported so as to be rotatable around a vertical axis along the vertical direction.

  According to this configuration, one end of the main seedling stage in the movable support frame that supports the medicine spraying device on the side of the secondary seedling stage is rotatable around the vertical axis, so for example The position of the medicine spraying device on the side seedling mounting table side can be easily changed from the use position to the retracted position without requiring a large force, compared with the case where the medicine spraying device on the mounting table is detachable.

In the above configuration,
It is preferable that the medicine spraying device on the side of the seedling stage is configured to change the position from the use position to the retracted position by rotating on the rear side of the seedling stage.

  According to this configuration, since the medicine spraying device on the side of the seedling stage is rotated on the rear side of the seedling stage, the position of the seedling stage is changed from the use position to the retracted position. This will not interfere with the position changing operation of the medicine spraying device on the seedling stage.

In the above configuration,
In the state where the medicine spraying device on the side seedling stage is in the use position, a first connection frame that connects and supports the other end of the movable support frame opposite to the one end,
It is preferable that the medicine spraying device on the side of the auxiliary seedling stage is provided with a second connection frame that can connect and support the other end portion in the state of the retracted position.

  According to this configuration, the medicine spraying device on the side of the auxiliary seedling stage in the use position is connected and supported by the first connection frame via the other end of the movable support frame, and the medicine on the side of the auxiliary seedling stage in the retracted position. The spreading device is connected and supported by the second connection frame via the other end of the movable support frame. Therefore, the medicine spraying device on the side seedling stage can be stably supported both in the use position and in the retracted position.

In the above configuration,
A connecting operation tool capable of connecting and disconnecting the other end to the first connecting frame or the second connecting frame;
It is preferable that the connection operation tool is attached to the movable support frame.

  According to this configuration, since the connection operation tool is provided on the movable support frame that supports the medicine spraying device on the side of the auxiliary seedling stand, for example, the connection operation tool is provided on both the first connection frame and the second connection frame. It is possible to reduce the number of connection operation tools than to provide them.

In the above configuration,
It is preferable that the first connection frame is provided with a first guide member that guides the movable support frame so that the connection operation tool is positioned at a connection location of the use position.

  According to this configuration, the movable support frame that supports the drug spraying device on the side seedling stage side is moved by the first guide member when the drug spraying device on the side seedling table side is changed from the retracted position to the use position. Since it guides to the 1st connection frame side, the medicine spraying apparatus by the side of the auxiliary seedling stand can be easily moved to the connection location of the use position of a connection operation tool.

In the above configuration,
A first receiving port into which the other end fits into the first guide member;
The first receiving port is preferably widened from the front toward the rear.

  According to this configuration, when the movable support frame that supports the medicine spraying device on the side of the auxiliary seedling table is guided by the first guide member, even if the movable support frame is slightly bent, as it moves from the front to the rear, The wide first receiving port can be smoothly guided to the connecting portion from the front to the rear.

In the above configuration,
It is preferable that the second connection frame is provided with a second guide member that guides the movable support frame so that the connection operation tool is positioned at the connection position of the retracted position.

  According to this configuration, the movable support frame that supports the medicine spraying device on the side seedling stage is moved by the second guide member when the medicine spraying device on the side seedling stage is changed from the use position to the retracted position. Since it is guided to the second connection frame side, the medicine spraying device on the side of the auxiliary seedling stage can be easily moved to the connection location of the retraction position of the connection operation tool.

In the above configuration,
A second receiving port into which the other end fits into the second guide member is provided;
The second receiving port is preferably widened from the front toward the rear.

  According to this structure, even when the movable support frame is slightly bent when the movable support frame supporting the medicine spraying device on the side of the auxiliary seedling table is guided by the second guide member, as it moves from the front to the rear, The second receiving port which is wide can be smoothly guided to the connecting portion from the front to the rear.

In the above configuration,
It is preferable that the second connection frame is a frame that supports another drug spraying device different from the drug spraying device on the side of the auxiliary seedling stage among the plurality of drug spraying devices.

  According to this configuration, the frame that supports another drug spraying device different from the drug spraying device on the side seedling mounting table side may be used as the second connection frame that can support the drug spraying device on the side seedling mounting table side. Since it is utilized, the number of members can be reduced as compared with the case where the frame supporting other drug spraying device and the second connecting frame capable of supporting the drug spraying device on the seedling stand side are separated. .

In the above configuration,
A harness connected to the medicine spraying device on the side seedling stage is provided,
It is preferable that the harness is routed along the one end.

  According to this configuration, since the harness connected to the medicine spraying device on the side of the auxiliary seedling stage is routed along one end portion of the movable support frame serving as the rotation support shaft, When the medicine spraying device is moved between the use position and the retracted position, the harness can be prevented from being pulled excessively.

It is a whole side view which shows a rice transplanter. It is a whole top view showing a rice transplanter. It is a side view which shows the circumference | surroundings of the chemical | medical agent spraying apparatus in case a seedling mounting stand is a working state and the chemical spraying apparatus by the side seedling mounting base exists in a use position. It is a rear view which shows the periphery of an auxiliary seedling stand. It is a side view which shows the circumference | surroundings of the chemical | medical agent spraying apparatus in case the seedling mounting stand is in the accommodated state and the chemical spraying apparatus on the side of the secondary seedling mounting is in the retracted position. It is a rear view which shows the circumference | surroundings of the chemical | medical agent spraying apparatus in case a seedling mounting stand is a working state and the chemical spraying apparatus by the side seedling mounting base exists in a use position. It is a rear view which shows the circumference | surroundings of the chemical | medical agent spraying apparatus in case the seedling mounting stand is in the accommodation state and the chemical spraying apparatus on the side seedling mounting base is in the retracted position. It is a rear view which shows the periphery of the chemical spraying apparatus by the side of the main seedling stand. It is a rear view which shows the periphery of the chemical spraying apparatus by the side seedling mounting stand side. It is a rear view which shows the periphery of the chemical spraying apparatus by the side seedling mounting stand side at the time of replacing a mud removal frame with a dummy plate.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, a traveling body of a riding type rice transplanter includes a pair of left and right front wheels 10 and a body frame 12 supported by a pair of left and right rear wheels 11. A link mechanism 13 is supported at the rear end of the machine body frame 12 on the rear side of the traveling machine body so that the link mechanism 13 can swing up and down, and an extendable hydraulic cylinder 14 is provided.

  The traveling machine body includes a driving unit 15 that performs a driving operation. The driving unit 15 includes a driver seat 16 on which a driver can sit, a plurality of operation levers 17 for inputting operation inputs for various driving operations, a steering handle 18 for performing a steering operation for the left and right front wheels 10, and the like. ing. In addition, on the left and right sides of the steering handle 18 at the front portion of the driver seat 16, a spare seedling stand 19 on which a spare seedling can be placed is erected. An engine 21 covered with a bonnet 20 is provided on the front side of the steering handle 18.

  A seedling stage 22 is connected to the rear end portion of the link mechanism 13 and the rear end portion of the hydraulic cylinder 14. That is, the seedling stage 22 is supported by the machine body frame 12 through the link mechanism 13 and the hydraulic cylinder 14 so as to be movable up and down. The seedling stage 22 is configured to be able to place eight seedlings. That is, this rice transplanter is configured to have an 8-row planting specification.

  The rice transplanter is provided with a traveling transmission system that shifts the driving force from the transmission case 23 to which the driving force of the engine 21 is transmitted and transmits it to the left and right front wheels 10 and the left and right rear wheels 11. In addition, the rice transplanter is provided with a work transmission system that transmits the driving force from the mission case 23 to the seedling planting device 25 via the intermediate transmission shaft 26.

  The link mechanism 13 includes an upper top link 28 and a lower lower link 29. The seedling planting device 25 has a vertical link 30 connected to the rear ends of the top link 28 and the lower link 29. A feed case 31 is connected to the vertical link 30 in a freely rolling manner. The feed case 31 functions as a drive mechanism that reciprocates the seedling stage 22 in the left-right direction, and the drive force from the intermediate transmission shaft 26 is transmitted to the feed case 31.

  A square pipe-shaped main frame 33 extending in the left-right direction is connected to the feed case 31. Front end portions of four drive cases 34 are connected to the main frame 33. The drive case 34 is provided with a drive shaft (not shown) that transmits the drive force from the feed case 31 in a posture parallel to the main frame 33. A rear end portion of the drive case 34 is provided with a pair of rotary planting mechanisms 35. The planting mechanism 35 includes a pair of planting arms 36 and a planting claw 37 provided on the planting arm 36.

  Five leveling floats 38 are provided below the seedling planting device 25. Slide rails 39 are provided on the upper surfaces of the four drive cases 34. The seedling stage 22 is provided in a form supported by the slide rail 39.

  A seedling placement surface 44 is formed on the seedling placement base 22 in a state of being partitioned by a plurality of standing wall-like boundary walls 43 so as to place eight strips of mat-like seedlings. A conveyor belt 45 is provided. At the time of planting, a vertical feed drive mechanism (not shown) is provided for driving the vertical conveyor belt 45 downward every time the seedling stage 22 reaches the left and right moving ends. A drive arm 46 is provided on the rear surface side of the seedling mount 22, and a transmission structure that transmits a reciprocating force in the left-right direction from the feed case 31 to the drive arm 46 is provided.

  Thus, during work, the lateral reciprocating drive force from the feed case 31 is transmitted to the drive arm 46, and the seedling stage 22 is reciprocated in the left-right direction in synchronization with the driving of the planting mechanism 35. Each time the seedling stage 22 reaches the moving end in the left-right direction, the vertical feed drive mechanism operates the vertical conveying belt 45 in the vertical direction.

[About changing the state of the seedling stand]
As shown in FIG. 2, FIG. 4, FIG. 6, etc., the seedling stage 22 is composed of six main seedling stages 42 and two auxiliary seedling stages 41 at the left end. An end storage mechanism 40 is disposed at a portion connecting the seedling mounting table 42 and the auxiliary seedling mounting table 41, and an upper lock mechanism 47 and a lower lock are provided at a boundary portion B between the main seedling mounting table 42 and the auxiliary seedling mounting table 41. And a mechanism 48.

  As shown in FIG. 3, FIG. 6, and the like, the seedling mounting table 22 of the seedling planting device 25 includes a work state D1 in which a main seedling mounting table 42 and an auxiliary seedling mounting table 41 are connected side by side in the left-right direction, As shown in FIG. 5 and FIG. 7, the auxiliary seedling mounting table 41 is separated from the main seedling mounting table 42 so that the state can be changed between the storage state D2 in which the lateral width is reduced as compared with the working state D1. Has been. Switching between the work state D1 and the storage state D2 of the seedling stage 22 is realized by the end portion storage mechanism 40. The end storage mechanism 40 separates one auxiliary seedling mounting base 41 corresponding to two strips located at the end of the seedling mounting base 22 at the boundary portion B, and one side of the seedling mounting base 22 on the left and right center C side. By folding so as to overlap the main seedling table 42, the overall width of the seedling table 22 can be shortened by one line. That is, the auxiliary seedling stage 41 is positioned on the end side in the left-right direction of the main seedling stage 42 and is configured to be movable with respect to the main seedling stage 42. In addition, the seedling stage 22 is configured so that the auxiliary seedling stage 41 and the main seedling stage 42 overlap each other in the storage state D2. In addition, as FIG. 2 etc. show, the left-right center C of the seedling stand 22 is substantially corresponded with the left-right center of the traveling body.

  As shown in FIGS. 3 to 5, the slide rail 39 is bent at the main rail portion 49 near the left and right center C side of the seedling stage 22 and the end of the main rail portion 49 is bent through a hinge mechanism 50. And a sub-rail portion 51 that is freely connected. The guide frame 52 includes a main guide frame 52 </ b> A provided on the main seedling placing table 42 and a sub guide frame 52 </ b> B provided on the auxiliary seedling placing table 41.

  As shown in FIG. 4 and the like, the end portion storage mechanism 40 includes a horizontally long connecting plate 54 fixed to the main seedling stand 42 on the back side of the seedling stand 22 and an intermediate pin 55 of the connecting plate 54. A telescopic plate 56 that is extendable in the left-right direction in a guided state and that can swing at the end on the extension side, and a protruding end of the telescopic plate 56 with respect to the auxiliary seedling mounting table 41 via a swinging shaft 57. And a movable connecting plate 58 that is swingably supported.

  By providing the connecting plate 54, the intermediate pin 55, the telescopic plate 56, and the moving connecting plate 58, the auxiliary seedling mounting table 41 is pulled out with respect to the main seedling mounting table 42. Folding is possible in such a manner that the mounting base 41 is swung rearward and the auxiliary seedling mounting base 41 is stacked on the rear upper side of the main seedling mounting base 42. Thereby, the shortening of the dimension in the lateral width direction of the seedling mounting table 22 is realized.

  As shown in FIG. 4 and the like, the hinge mechanism 50 is formed at the end portion of a bolt (not shown) penetrating through the end position of the main rail portion 49 of the slide rail 39 and the sub rail portion 51. Knob 59, a long hole through which the bolt passes, and a rail bracket 60 maintained by the sub rail portion 51 are provided. The hinge mechanism 50 bends the main rail portion 49 and the sub rail portion 51 by operating the knob 59 to release the fastening from the state where the main rail portion 49 and the sub rail portion 51 are linearly connected. Is possible.

  In order to shorten the lateral width of the seedling stage 22, the seedling stage 22 is moved to the left end of the reciprocating movement area and stopped. In this stop state, the upper lock mechanism 47 is unlocked by operating the upper lock lever 61, the lower lock mechanism 48 is unlocked by operating the lower lock lever 62, and the auxiliary seedling table 41 is pulled out. I do.

[About drug spraying device]
As shown in FIG. 1 to FIG. 3 and FIG. 5 to FIG. 7, on the rear side of the seedling mount 22, a plurality of medicine sprayers A arranged in the left-right direction are provided. The medicine spraying device A includes a main body case 65 and a medicine hopper 66 that is connected to the upper portion of the main body case 65 and stores medicines such as herbicides. The main body case 65 of the medicine spraying device A is supported on the seedling planting device 25 side. Inside the main body case 65, the feeding mechanism 68 for feeding the medicine stored in the medicine hopper 66, and the medicine sprayed while diffusing the medicine fed by the feeding mechanism 68 diagonally backward and downward in the left-right direction are realized. And a diffusion mechanism 69.

  The feeding mechanism 68 and the diffusion mechanism 69 are driven by electric power supplied from the harness 70 shown in FIGS. The delivery mechanism 68 is configured to deliver a set amount of medicine for each operation. The diffusion mechanism 69 is provided with a diffusion plate that is driven to rotate by an electric motor (not shown). The drug spraying device A is controlled to spray the drug by driving the feeding mechanism 68 and the diffusion mechanism 69 for a set time each time a set number of strains are planted by the seedling planting device 25.

  Further, at the time of planting operation, every time the number of seedlings to be planted in the farm scene reaches the set number, the drug spraying device A is operated to spray the set amount of drug. Thereby, planting of the 8 seedlings is executed, and a predetermined amount of the medicine is sprayed by the medicine spraying apparatus A on the field scene where the seedlings are planted.

[About changing the position of the medicine spraying device]
As shown in FIGS. 2 and 6 to 9, the drug spraying device A includes a movable drug spraying device A1 that can move and a fixed drug spraying device A2 that cannot move. . The movable medicine spraying device A1 is the medicine spraying device A on the side seedling mounting table 41 side. The fixed-side medicine spraying device A2 is the medicine spraying device A on the main seedling stage 42 side.

  The movable-side medicine spraying device A1, which is the medicine spraying device A on the side seedling stage 41 side, is used from the use position E1 (see FIGS. 2, 3, 6, and 9) corresponding to the work state D1. In addition, the position can be changed to a retracted position E2 (see FIGS. 2, 5, and 7) that is further away to the left and right center C side of the seedling stage 22.

  As shown in FIG. 6, the movable-side medicine spraying device A1 at the use position E1 is located behind the boundary portion B between the main seedling mounting table 42 and the auxiliary seedling mounting table 41. The movable-side medicine spraying device A1 at the retreat position E2 is located on the left and right center C side of the seedling stage 22 relative to the boundary portion B between the main seedling stage 42 and the auxiliary seedling stage 41.

  As shown in FIG. 3, FIG. 5 to FIG. 7, FIG. 9, and the like, a movable support frame 72 that supports a movable-side medicine spraying device A1 that is the medicine spraying device A on the side seedling stage 41 side is provided. The movable support frame 72 is configured by an inverted U-shaped pipe frame in rear view. The front surface portion of the movable-side medicine spraying device A1 is fixed to the intermediate portion 73 of the movable support frame 72. One end portion 74 extends downward from one end side of the intermediate portion 73, and the other end portion 75 extends downward from the other end side of the intermediate portion 73.

  As shown in FIG. 3, FIG. 5, and the like, the vertical support column portion 76 of the movable support frame 72 is located at the front and rear center portion of the movable drug dispensing device A <b> 1 in a side view. Thereby, since the vertical support | pillar part 76 of the movable support frame 72 will be located in the location close | similar to the gravity center position of movable side chemical | medical agent dispersion apparatus A1, the position of movable side chemical | medical agent dispersion apparatus A1 is hard to shift | deviate, and movable side chemical | medical agent dispersion | spreading. The turning operation of the device A1 becomes easy.

  As shown in FIGS. 2, 6, 7, and 9, one end 74 on the main seedling stage 42 side of the movable support frame 72 is rotatable around the vertical axis Z along the vertical direction. It is supported. If it demonstrates, the movable support frame 72 which supports movable side chemical | medical agent spraying apparatus A1 will be comprised by the one end part 74 located in the left-right center C side of the seedling mounting stand 22 so that rotation is possible. One end portion 74 of the movable support frame 72 is supported by a pivot frame 71 extending in the vertical direction and supported by the drive case 34 closer to the left and right center.

  As shown in FIGS. 2, 6, and 7, the movable-side drug spraying device A <b> 1 that is the drug spraying device A on the side of the auxiliary seedling table 41 is used by rotating on the rear side of the seedling table 22. The position is changed from the position E1 to the retracted position E2.

  As shown in FIGS. 6, 9, etc., when the movable-side medicine spraying device A <b> 1 that is the medicine spraying device A on the side seedling stage 41 side is in the use position E <b> 1, A first connection frame 77 for connecting and supporting the other end 75 on the opposite side is provided.

  Further, as shown in FIGS. 2 and 7, when the movable-side medicine spraying device A1 which is the medicine spraying device A on the side seedling stage 41 side is in the retracted position E2, the other end portion 75 can be connected and supported. A double connection frame 78 is provided. The second connection frame 78 as a fixed support frame is another drug spraying device A different from the movable-side drug spraying device A1 which is the drug spraying device A on the side seedling stage 41 side among the plurality of drug spraying devices A. It is a frame which supports fixed side medicine spraying apparatus A2. As shown in FIGS. 6 to 8 and the like, the second connection frame 78 is configured by an inverted U-shaped pipe frame in a rear view.

  As shown in FIGS. 6 and 7, the vertical length of the vertical strut portion 76 of the movable support frame 72 that supports the movable-side drug spraying device A1 that is the drug spraying device A on the side seedling mounting table 41 side is second. It is shorter than the vertical length of the vertical column part of the connection frame 78. Thereby, when the movable support frame 72 is rotated and moved, the amount of bending of the movable support frame 72 due to the weight of the movable-side medicine spraying device A1 can be suppressed.

[About connection operation tool]
As shown in FIG. 3, FIG. 5 to FIG. 7, and FIG. 9, the other end 75 of the first connection frame 77 is provided on the movable-side medicine spraying device A <b> 1 side which is the medicine spraying device A on the side seedling mounting table 41 side. Is connected to the first connection frame 77 or the second connection frame 78, and a connection operation tool 79 is provided. The connection operation tool 79 is attached to the other end 75 of the movable support frame 72. That is, since the connection operation tool 79 is provided in the other end portion 75 that is a movable support column that is not the one end portion 74 that is the rotation support column of the movable drug dispensing device A1, the rotation operation of the movable drug dispensing device A1 is performed. It is supposed to move with it.

  As shown in FIGS. 6, 7, 9, and the like, the connection operation tool 79 includes an operation member 80 formed of a horizontal U-shaped rod-shaped member and a lateral direction fixed to the other end 75 of the movable support frame 72. A first guided member 81 made of a U-shaped plate member and a spring 82 are provided. The spring 82 is disposed between the vertical surface of the first guided member 81 and the movable support frame 72. By fitting the two leg portions 83 of the operation member 80 into the first connection hole portion 84 of the first connection frame 77 or the second connection hole portion 85 of the second connection frame 78, The end portion 75 is connected to the first connection frame 77 or the second connection frame 78. The two leg portions 83 are urged by a spring 82 so as to fit into the first connection hole portion 84 of the first connection frame 77 or the second connection hole portion 85 of the second connection frame 78. That is, the connection operation tool 79 is biased from the connection release state to the connection state by the action of the spring 82.

  As shown in FIGS. 6, 7, 9, and the like, the first connection frame 77 has a first guide member that guides the movable support frame 72 so that the connection operation tool 79 is positioned at the connection position of the use position E <b> 1. 86 is provided.

  As shown in FIG. 9 and the like, the first guide member 86 is provided with a first receiving port 87 into which the other end portion 75 of the movable support frame 72 is fitted. The first receiving port 87 becomes wider from the front to the rear. The first upper surface 87A of the first receiving port 87 is inclined so as to descend downward from the rear toward the front. The upper lower surface of the first guided member 81 is guided by the first upper surface 87A.

  The second connection frame 78 shown in FIGS. 6 to 8 and the like is a support column that supports the fixed-side drug spraying device A2 that is disposed adjacent to the left and right of the movable-side drug spraying device A1. The second connection frame 78 includes a second guide member 88 that guides the other end portion 75 of the movable support frame 72 so that the connection operation tool 79 is located at the connection position of the retracted position E2.

  As shown in FIG. 8 and the like, the second guide member 88 is provided with a second receiving port 89 into which the other end portion 75 of the movable support frame 72 is fitted. The second receiving port 89 becomes wider from the front to the rear. The second upper surface 89A of the second receiving port 89 is inclined so as to be rearwardly lowered from the rear toward the front. The upper lower surface of the first guided member 81 is guided by the second upper surface 89A.

  As shown in FIG. 9, a harness 70 is provided that is connected to the movable-side drug spraying device A1 that is the drug spraying device A on the side seedling stage 41 side. The feeding mechanism 68 and the diffusion mechanism 69 of the medicine spraying device A are driven by the electric power transmitted from the harness 70. The harness 70 is routed along the one end 74 of the movable support frame 72. That is, the harness 70 is provided not at the other end portion 75 that is the movable support column of the movable medicine spraying device A1, but at the one end portion 74 that is a rotating support column. Therefore, the harness 70 can be easily routed without being pulled.

[About support frame of mud cover]
As shown in FIGS. 1, 3, and 5, each drive case 34 is provided with a mud removal cover 92 that prevents mud splashed from the planting mechanism 35 from splashing toward the medicine spraying device A side. ing. The mud removing cover 92 is supported by the drive case 34 via the mud removing frame 93 shown in FIGS. 1, 3, and 5 to 9. An L-shaped angle member 94 that supports the lower end of the first connection frame 77 is provided. The angle member 94 is fixed to the lower end portion of the first connection frame 77 by welding. As shown in FIG. 9 and the like, the mud removal frame 93 is provided with a plate member 95 and a support rod 96 bent in an L shape that is welded and fixed to both left and right ends of the plate member 95. . The angle member 94 that connects the lower ends of the first connection frame 77 and the plate member 95 of the mud removal frame 93 are fastened together by bolt connection to the drive case 34.

  As shown in FIG. 10, when the mud removal cover 92 is unnecessary, the mud removal frame 93 is also unnecessary, and is removed from the drive case 34. In this case, the same thickness as the plate member 95 of the mud removing frame 93 is provided between the drive case 34 and the angle member 94 connecting the lower ends of the first connecting frame 77 instead of the mud removing frame 93. A plate-shaped dummy plate 97 is attached. Thereby, even when the mud cover 92 is removed, the angle member 94 and the first connection frame 77 with respect to the drive case 34 can be firmly fixed. Therefore, even when the mud removal cover 92 is removed, the movable medicine spraying device A1 supported by the movable support frame 72 can be stably supported on the drive case 34 side.

[Another embodiment]
Hereinafter, another embodiment of the present invention will be described. Each of the following different embodiments may be applied to the above embodiment in combination as long as no contradiction arises. The scope of the present invention is not limited to the contents of these embodiments.

(1) In the above embodiment, the movable-side drug spraying device A1, which is the drug spraying device A on the side seedling stage 41 side, rotates around the vertical axis Z and is between the use position E1 and the retracted position E2. However, the present invention is not limited to this. For example, the movable-side drug spraying device A1, which is the drug spraying device A on the side seedling stage 41 side, is configured to be slidable in the left-right direction of the machine body so that the position can be changed between the use position E1 and the retracted position E2. Also good. Further, for example, the movable-side medicine spraying device A1 which is the medicine spraying device A on the side seedling stage 41 side is configured to be detachable, and the movable-side medicine spraying device A1 is attached to and detached from the use position E1 and the retreat position E2. You may be comprised so that replacement is possible.

(2) In the above embodiment, the movable-side medicine spraying device A1, which is the medicine spraying device A on the side of the auxiliary seedling table 41 in the retracted position E2, is behind the place where the auxiliary seedling mounting table 41 and the main seedling mounting table 42 overlap. Although what is located in is illustrated, it is not restricted to this. For example, the movable-side medicine spraying device A1 that is the medicine spraying device A on the side of the auxiliary seedling stage 41 in the retreat position E2 is located on the left and right sides of the seedling mounting base 22 rather than the place where the auxiliary seedling mounting base 41 and the main seedling mounting base 42 overlap. You may be comprised so that it may be located in the location near the center C side.

(3) In the above embodiment, the auxiliary seedling stage 41 is provided at the left end of the seedling stage 22, but is not limited thereto. For example, the auxiliary seedling stage 41 may be provided at the right end of the seedling stage 22. In addition, the auxiliary seedling stage 41 may be provided at the left and right ends of the main seedling stage 42.

(4) In the above-described embodiment, as the plurality of drug sprayers A, one including two movable drug sprayers A1 and one fixed drug sprayer A2 is illustrated. Not limited to this. Three or more medicine sprayers A may be provided. In this case, for example, two movable drug dispensing devices A1 may be provided on the left and right sides of one fixed drug dispensing device A2.

(5) In the above embodiment, the seedling mounting table 22 is illustrated in which the auxiliary seedling mounting table 41 and the main seedling mounting table 42 overlap with each other in the storage state D2, and the left and right widths are reduced. Not limited to. For example, it may be another seedling stage whose left and right widths are reduced when the auxiliary seedling stage 41 is bent downward or upward with the boundary part B as a fulcrum to enter the storage state D2.

22: Seedling stage 41: Subseed stage 42: Main seedling stage 70: Harness 72: Movable support frame 74: One end part 75: Other end part 77: First connection frame 78: Second connection frame 79: Connection operation Tool 86: 1st guide member 87: 1st receiving port 88: 2nd guide member 89: 2nd receiving port A: Drug spraying apparatus A1: Movable side drug spraying apparatus (medicine spraying apparatus by the side seedling stand side)
D1: Work state D2: Storage state E1: Use position E2: Retraction position

Claims (12)

A seedling stand,
A medicine spraying device configured to spray a medicine on a field, and arranged in a plurality in the left-right direction on the rear side of the seedling platform; and
The seedling stage is provided with a main seedling stage, an auxiliary seedling stage that is located on an end side in the left-right direction of the main seedling stage and is movable with respect to the main seedling stage,
In the working state in which the seedling stage is connected to the main seedling stage and the auxiliary seedling stage side by side in the left-right direction, and the auxiliary seedling stage is separated from the main seedling stage, Is also configured to be changeable between the stowed state in which the left and right widths are reduced,
The rice sprayer configured such that the medicine spraying device on the side seedling stage is changeable from a use position corresponding to the working state to a retreat position that is further away from the use position to the left and right center side of the seedling stand. Machine.   The rice transplanter according to claim 1, wherein in the stored state, the auxiliary seedling stage and the main seedling stage are overlapped. A movable support frame for supporting the medicine spraying device on the side seedling stage is provided,
The rice transplanter according to claim 1 or 2, wherein one end portion of the movable support frame on the main seedling stage side is supported so as to be rotatable around a vertical axis along the vertical direction.   The medicine spraying device on the side of the seedling stage is configured to change the position from the use position to the retracted position by rotating on the rear side of the seedling stage. Rice transplanter. In the state where the medicine spraying device on the side seedling stage is in the use position, a first connection frame that connects and supports the other end of the movable support frame opposite to the one end,
The rice transplanter according to claim 4, further comprising: a second connection frame capable of connecting and supporting the other end portion in a state where the medicine spraying device on the side of the auxiliary seedling stand is in the retracted position. A connecting operation tool capable of connecting and disconnecting the other end to the first connecting frame or the second connecting frame;
The rice transplanter according to claim 5, wherein the connection operation tool is attached to the movable support frame.   The rice transplanter according to claim 6, wherein the first connection frame is provided with a first guide member that guides the movable support frame so that the connection operation tool is positioned at a connection location of the use position. A first receiving port into which the other end fits into the first guide member;
The rice transplanter according to claim 7, wherein the first receiving port becomes wider from the front toward the rear.   9. The second guide member for guiding the movable support frame to the second connection frame so that the connection operation tool is positioned at the connection position of the retracted position. The rice transplanter described. A second receiving port into which the other end fits into the second guide member is provided;
The rice transplanter according to claim 9, wherein the second receiving port becomes wider from the front toward the rear.   The said 2nd connection frame is a flame | frame which supports the other chemical | medical agent spraying apparatus different from the said chemical | medical agent spraying apparatus by the side of the auxiliary seedling stand among a plurality of said chemical spraying apparatuses. Rice transplanter as described in A harness connected to the medicine spraying device on the side seedling stage is provided,
The rice transplanter according to any one of claims 4 to 10, wherein the harness is routed along the one end.

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