WO2015118891A1

WO2015118891A1 - Granular body feeding device and granular body spraying device

Info

Publication number: WO2015118891A1
Application number: PCT/JP2015/000614
Authority: WO
Inventors: 竹田　裕一; 大前　健介; 致治潮
Original assignee: ヤンマー株式会社
Priority date: 2014-02-10
Filing date: 2015-02-10
Publication date: 2015-08-13
Also published as: CN105979766B; KR101869622B1; CN105979766A; KR20160082700A

Abstract

A seed feeding device (9) provided in a direct seeding device is provided with a feeding case (21). The feeding case (21) is disposed below a hopper that accommodates seeds, and seeds are supplied to the case. A feeding roll that feeds a prescribed amount of seeds at each time is provided inside the feeding case (21). The feeding case (21) has a driven gear support unit (left side wall (33)) and a drive gear support unit (49). The driven gear support unit (left side wall (33)) supports a driven gear (30) that rotates as a unit with the feeding roll. The drive gear support unit (49) supports a drive gear (31) that meshes with the driven gear (30).

Description

Granular body feeding device and granular material spraying device

The present invention mainly relates to a gear support structure for transmitting a driving force to a feeding portion in a granular material feeding device.

A direct sowing device (granular material spraying device) that feeds seeds (granular solids) little by little and sprays them on the field is known. The direct sowing device includes a hopper that accommodates seeds, and a seed feeding device (granule feeding device). The seed feeding device includes a feeding case arranged below the hopper. In the feeding case, a feeding roll having a feeding hole formed in the peripheral surface is provided. By rotating the feeding roll, the seeds in the hopper are taken into the feeding hole little by little and are fed out and discharged toward the ground of the field.

In this type of direct seeding device or seed feeding device, the feeding case supports a feeding shaft that is a rotating shaft of the feeding roll. A driven gear is fixed to the feeding shaft. Such a configuration is described in Patent Document 1, for example.

In Patent Document 1, a driving gear for inputting a driving force to a driven gear is provided. Power from the engine is input to the rotation shaft (seeding drive shaft) of the drive gear. With the configuration of Patent Document 1, each feeding roll can be driven by power from the engine.

In Example 2 of Patent Document 2, a slide roll type feeding roll is described. That is, this type of feeding roll includes a main body roll and a fitting roll, and is configured to be able to slide the fitting roll with respect to the main body roll. Then, by adjusting the position of the fitting roll with respect to the main body roll, the feeding amount of the granular material can be adjusted by changing the width of the feeding hole (conveying hole).

In Example 2 of Patent Document 2, an adjustment dial for adjusting the position of the fitting roll is provided. By rotating this adjustment dial, the fitting roll is slid to adjust the feed amount of the granular material.

Moreover, a fertilizer applicator provided on the body of a rice transplanter is known as a kind of the above-mentioned granular material spraying device. This fertilizer spreader applies solid granular fertilizer to the ground. The fertilizer applicator includes a hopper that is a container for storing fertilizer. Such a fertilizer applicator is described in Patent Document 3, for example.

Patent Document 3 discloses a configuration in which an upper fertilizer provided with a hopper can be rotated upward. The fertilizer disclosed in Patent Document 3 includes a first upper fertilizer and a second upper fertilizer, and the first upper fertilizer and the second upper fertilizer can be divided into left and right and rotated upward. It is configured to be able to. Since patent document 3 can discharge | emit the fertilizer in a 1st upper fertilizer and a 2nd upper fertilizer easily by this, the maintenance, such as the cleaning in the said 1st upper fertilizer and a 2nd upper fertilizer, should be performed easily. Suppose you can.

In the configuration of Patent Document 3, the driving force from the engine is input to the first upper fertilizer through the clutch. Moreover, patent document 3 is provided with the connection mechanism for transmitting motive power from a 1st upper fertilizer to a 2nd upper fertilizer.

Moreover, as described in Patent Document 4, the rice transplanter includes a seedling placing table for placing a seedling to be planted in a farm field. In a general riding type rice transplanter, the seedling platform is disposed behind the driver seat.

When the remaining seedlings placed on the seedling stand are low, the operator replenishes seedlings as necessary. In a general mat seedling type rice transplanter, the seedling supplied to the seedling mount is a mat seedling formed in a mat shape. When supplying mat seedlings to the seedling stand, the operator places the mat seedlings to be supplied on a seedling board (also called seedling scooping board, seedling collecting board, etc.) so as not to break the shape of the mat seedlings. Carry it to the vicinity of the seedling stand while keeping in mind. Then, the operator slides the mat seedling on the seedling plate toward the seedling stage by tilting the seedling plate. Thereby, mat seedlings are supplied to the seedling stage.

JP 2013-132235 A JP 2007-37495 A JP 2010-130932 A Japanese Patent No. 4764239

In the configuration of Patent Document 1, the rotation shaft (feeding shaft) of the driven gear is supported by the feeding case. On the other hand, the rotation shaft of the drive gear (seeding drive shaft) is supported by the bracket. A feeding case is fastened and attached to a first support member made of a square pipe member provided from the bracket by a bolt.

In such a configuration of Patent Document 1, due to the influence of the attachment accuracy of the supply case to the first support member, the forming accuracy of the supply case, the assembly accuracy of the bracket and the first support member, etc., the rotation shaft of the driven gear (the supply shaft) ) And the rotation shaft of the drive gear (seeding drive shaft). As a result, the meshing between the driven gear and the drive gear may be deteriorated.

Therefore, the main object of the present invention is to suppress the variation between the cores of the driven gear and the driving gear for driving the feeding roll in the granular material feeding device, and improve the meshing accuracy of the driven gear and the driving gear. To provide a configuration.

By the way, Patent Document 1 describes a sowing apparatus having four seed feeding mechanisms arranged side by side. Each seed feeding mechanism has a seed feeding roll. That is, the seeding device of Patent Document 1 includes four seed feeding rolls.

For example, it is also possible to employ the slide roll type feeding roll described in Patent Document 2 in the seeding apparatus of Patent Document 1. However, since the seeding device of Patent Document 1 includes four feeding rolls, it is necessary to individually adjust the feeding amount for each of the four feeding rolls. For this reason, there exists a subject that the operation | work which adjusts feeding amount takes time.

Therefore, a configuration is considered in which the feeding amounts of a plurality of feeding rolls can be adjusted simultaneously. For example, instead of the adjustment dial of Patent Document 2, an adjustment gear configured as a flat gear is provided, and an operation gear that meshes with the adjustment gear is provided. Then, a plurality of operation gears are arranged in the axial direction and connected by a connecting shaft. According to this, since a plurality of operation gears can be rotated all at once by rotating the connecting shaft, a plurality of feeding rolls can be adjusted all at once. Therefore, the trouble of individually adjusting the feeding amount for each of the plurality of feeding rolls can be saved.

By the way, in the configuration as described above, the engagement between the adjustment gear and the operation gear is necessary only when adjusting the feeding amount. In other cases, the engagement between the adjustment gear and the operation gear is It is unnecessary. Rather, from the viewpoint of preventing the adjustment gear and the operation gear from being worn or damaged, it is preferable that the engagement between the adjustment gear and the operation gear is released when the feed amount is not adjusted.

Therefore, one of the objects of the present invention is to provide a configuration capable of easily adjusting the feeding amount and preventing wear and breakage of the gear for the adjustment.

In the fertilizer disclosed in Patent Document 3, when the first upper fertilizer or the second upper fertilizer is rotated, the connection by the connection mechanism is released. Moreover, in the structure of patent document 3, in order to rotate a 1st upper fertilizer, in addition to a connection member, the operation | work which cancels | releases the connection of a clutch is also considered necessary.

For this reason, in the configuration of Patent Document 3, it is difficult to say that the procedure required for rotating the first upper fertilizer is complicated, and the first upper fertilizer can be easily rotated. In addition, when the first upper fertilizer applicator is rotated, if the clutch or the coupling mechanism is forgotten to be disconnected, the clutch or the coupling mechanism may be damaged.

Furthermore, since the configuration of Patent Document 3 requires a clutch and a coupling mechanism, the configuration of the fertilizer applicator becomes complicated, leading to an increase in cost.

Moreover, patent document 3 is provided with the fertilizer conveyance part which guides the fertilizer paid | fed out by the 1st upper fertilizer and the 2nd upper fertilizer. The fertilizer transfer section has a connecting pipe to which a transfer hose is connected. The connecting pipe is a substantially cylindrical member arranged such that the longitudinal direction is the front-rear direction.

In the fertilizer transfer section having such a configuration, deposits may accumulate inside the connecting pipe, and the connecting pipe may be clogged with fertilizer. Therefore, maintenance such as periodic cleaning of the inside of the connecting pipe is required.

In this regard, Patent Document 3 facilitates maintenance such as cleaning in the first upper fertilizer and the second upper fertilizer by rotating the first upper fertilizer and the second upper fertilizer upward. However, the fertilizer transport section cannot be rotated upward. For this reason, in the structure of patent document 3, it cannot be said that maintenance, such as cleaning of the inside of a connecting pipe, can be performed easily.

Therefore, one of the objects of the present invention is to provide a granular material spraying device that can easily rotate a supply unit that supplies granular materials. Another object of the present invention is to provide a configuration that can easily clean the inside of the connecting pipe provided in the transport section.

Further, in the rice transplanter disclosed in Patent Document 4, since the seedling collecting plate on which the mat seedling is placed has a certain weight, the work of supplying the mat seedling to the seedling stage is a heavy labor and is a burden on the operator. Is big.

In particular, the rice transplanter described in Patent Document 4 has a configuration in which a hopper for a fertilizer is provided between a driver seat and a seedling stage. In the rice transplanter having such a structure, the fertilizer hopper gets in the way during the operation of supplying the mat seedlings to the seedling stage, which makes the operation more difficult.

Therefore, one of the objects of the present invention is to provide a rice transplanter that can easily supply mat seedlings to a seedling stage.

Means and effects for solving the problems

The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to the first aspect of the present invention, a granular material feeding device having the following configuration is provided. That is, the granular material feeding device includes a feeding case that is disposed below a hopper that accommodates the granular material and is supplied with the granular material. In the feeding case, a feeding portion for feeding the granular material by a predetermined amount is provided. The feeding case includes a driven gear support portion and a drive gear support portion. The driven gear support portion supports a driven gear that rotates integrally with the feeding portion. The drive gear support portion supports a drive gear that meshes with the driven gear.

Thus, by supporting both the driven gear and the driving gear on the feeding case, the distance between the driven gear and the driving gear (the distance between the axes) is determined only by the accuracy of the feeding case. Thereby, the variation between the cores of the driven gear and the drive gear can be suppressed, and the gear meshing accuracy can be improved.

In the granular material feeding device, it is preferable that the driven gear support portion and the drive gear support portion are integrally formed.

Thus, by integrally forming the driven gear support portion and the drive gear support portion, the positions of the driven gear support portion and the drive gear support portion are determined only by the forming accuracy of the feeding case. Therefore, the center of the driven gear and the drive gear is not affected by the assembly accuracy. Thereby, the gear meshing accuracy can be further improved.

In the granular material feeding device, the following configuration is preferable. That is, the granular material feeding device includes a plurality of the feeding cases. Each feeding case is provided with a drive transmission shaft that is arranged with its axis aligned with the drive gear and transmits a driving force to the drive gear. The drive transmission shaft is provided independently for each feeding case. And the granular material feeding apparatus is provided with the connection part which connects the said drive transmission shafts of an adjacent feeding case.

As described above, since the drive transmission shaft is provided independently for each feeding case, the feeding case and the driving transmission shaft can be collectively handled as one unit. And a driving force can be transmitted to all the drive transmission shafts by connecting the drive transmission shafts of the adjacent feeding cases with the connecting portion.

In the granular material feeding device, it is preferable that each feeding case has a clutch mechanism between the drive transmission shaft and the driving gear.

As described above, since the drive transmission shaft is individually provided for each feeding case, if a clutch mechanism is provided for each feeding case, the driving transmission shaft, the clutch mechanism, and the feeding case are collectively handled as one unit. be able to.

In the granular material feeding device, the following configuration is preferable. That is, the feeding unit has an adjustment mechanism that can adjust the amount of the granular material to be fed. The feeding case includes an adjustment gear and an operation gear support. The adjustment gear is fixed to an adjustment shaft of the adjustment mechanism. The operation gear support portion supports an operation gear that can mesh with the adjustment gear.

Thus, by supporting the operation gear on the feeding case, the distance between the operation gear and the adjustment gear is determined only by the accuracy of the feeding case. Thereby, the variation between the centers of the adjustment gear and the operation gear can be suppressed, and the meshing accuracy of the adjustment gear and the operation gear can be improved.

In the granular material feeding device, the adjustment gear and the operation gear are engaged with each other by moving the rotation shaft of the operation gear toward or away from the adjustment shaft. It is preferable that the state can be switched.

The engagement between the operation gear and the adjustment gear can be released by separating the rotation shaft of the operation gear from the rotation shaft (adjustment shaft) of the adjustment gear. Thus, when the feed amount is not adjusted, the operation gear and the adjustment gear can be separated from each other, so that the operation gear and the adjustment gear can be prevented from being worn or damaged. In terms of releasing the engagement between the operation gear and the adjustment gear, a configuration in which the engagement with the adjustment gear is released by sliding the operation gear in the axial direction is also conceivable. In this case, it is necessary to form a chamfer on the end surfaces of the gear teeth of both gears so that the operation gear and the adjustment gear can be engaged again. However, even if a chamfer is formed, depending on the phase relationship between the operation gear and the adjustment gear, the gear teeth of both gears may collide in the axial direction. In such a case, the gears cannot be engaged with each other. . In particular, when a plurality of operation gears and adjustment gears are provided, there is a high possibility that they will not mesh. Also, if the gear is made of resin, sagging will occur and it will become increasingly unmeshing. Further, in order to form the chamfer, it is necessary to make the gear teeth wider, so there is a problem that not only the gear material cost is increased, but also the width of the entire apparatus is increased. In this regard, as described above, if the configuration is such that the same shaft of the gear approaches or separates, meshing can be performed without a chamfer, and thus an increase in cost can be prevented.

In the granular material feeding device, the following configuration is preferable. That is, a plurality of feeding cases are arranged in one direction, and the adjustment gear and the operation gear are provided corresponding to each of the plurality of feeding cases. The rotation shafts of the operation gears are connected to each other.

Thus, by connecting the rotation shafts of a plurality of operation gears, a plurality of operation gears can be rotated simultaneously. Thereby, the feeding amount of the feeding part of each feeding case can be adjusted all at once. In addition, since the rotation shafts of the respective operation gears are connected, it is possible to simultaneously switch the presence / absence of engagement with the adjustment gear using a plurality of operation gears.

In the granular material feeding device, it is preferable that an operation gear support portion for supporting a rotation shaft of the operation gear is fixedly provided in the feeding case.

As described above, since the rotation shaft of the operation gear is supported by the operation gear support portion fixedly provided on the case, the operation gear can be accurately positioned with respect to the feeding case. Thereby, the dispersion | variation between the said operation gear and the cores of an adjustment gear can be suppressed, and the meshing precision of both gears can be improved.

In the granular material feeding device, the following configuration is preferable. That is, the granular material feeding device includes a link member that can contact the rotation shaft of the operation gear. When the link member rotates around the link operation shaft, the rotation shaft of the operation gear is moved in a direction approaching or separating from the adjustment shaft.

Thus, by rotating the link operation shaft, the operation gear can be moved between the position where it is engaged with the adjustment gear and the position where the engagement is released.

In the granular material feeding device, it is preferable that the moving direction of the rotation shaft of the operation gear when approaching the adjustment shaft is directed to a position shifted from the axis center of the adjustment shaft.

This makes the operation gear approach the adjustment gear from an oblique direction, so that the gear teeth do not collide from the front. Thereby, while being able to mesh | engage gear teeth reliably, it can prevent that gear teeth collide and are damaged.

According to a second aspect of the present invention, a granular material spraying device having the following configuration is provided. That is, the granular material spraying device includes the granular material feeding device, the hopper, a drive output gear, and a transport unit. The drive output gear is rotationally driven by a drive force from a drive source. The conveyance unit conveys the granular material fed from the granular material feeding device to the ground. The supply unit for supplying the granular material includes the hopper and the granular material feeding device. The supply unit includes the feeding unit and a drive input gear. A driving force for driving the feeding portion is input to the driving input gear. The supply unit is configured to be movable between a work position at which the granular material can be supplied to the transport unit and an open position separated from the transport unit. When the supply unit is in the working position, the drive output gear and the drive input gear mesh with each other. The drive input gear is separated from the drive output gear by moving the supply unit from the work position toward the open position.

As described above, the transmission of the drive from the drive source to the feeding unit is realized by the meshing of the gears, and the gears are separated from each other when the supply unit is moved to the open position. Thereby, when moving a supply part to an open position, the operation of the clutch for canceling the connection between the supply part and the drive source becomes unnecessary. Further, since the clutch becomes unnecessary, there is no possibility that the clutch is forgotten to be broken and damaged.

In the granular material spraying device, the following configuration is preferable. That is, this granular material spraying apparatus includes a plurality of the supply units. The drive input gear included in each supply unit can mesh with the drive output gear.

Thus, since the drive input gear for receiving the drive force from the drive output gear is provided in each of the plurality of supply units, the drive force can be transmitted to each supply unit from one drive output gear. Therefore, a connection mechanism for transmitting driving force between the plurality of supply units is not necessary. In addition, the operation of releasing the connection mechanism is not required, and there is no possibility that the connection mechanism is forgotten to be broken and damaged.

The side view which shows the whole structure of the spreading work vehicle which concerns on 1st Embodiment of this invention. The front view of a direct seeding apparatus. The perspective view of a feeding case. The side view of a hopper and a feeding case. Side surface sectional drawing of a hopper and a feeding case. The rear sectional view of a feeding case. The back sectional view of a feeding roll. The perspective view of a feeding roll. The assembly perspective view of a clutch mechanism. The side view which shows a mode that the operation gear and the adjustment gear meshed | engaged. The side view which shows a mode that engagement of the operation gear and the adjustment gear was cancelled | released. The side view which mainly shows the moving direction of the rotating shaft part of an operation gear. The perspective view of the feeding case which concerns on the modification of 1st Embodiment. The side view which shows the whole structure of the rice transplanter which concerns on 2nd Embodiment of this invention. The rear view of a fertilizer applicator. The top view of a fertilizer applicator. The rear view which shows a mode that the supply part was rotated. The side view of a fertilizer applicator. Side surface sectional drawing of a fertilizer applicator. The side view which shows a mode that a feeding part is spaced apart from a conveyance part. Side surface sectional drawing which shows a mode that a feeding part is spaced apart from a conveyance part. Side surface sectional drawing which shows the modification of 2nd Embodiment. The side view which shows the whole structure of the rice transplanter which concerns on 3rd Embodiment of this invention. The top view of a rice transplanter. Side view of a fertilizer hopper. The rear view of a manure hopper. Side surface sectional drawing which shows a mode that the cover part of the fertilizer hopper was opened. Side surface sectional drawing which shows a mode that the rain avoidance part was rotated. The side view which shows a mode that the seedling board was mounted on the fertilizer hopper. The side view which shows a mode that a seedling board is rotated. The side view which shows the fertilizer hopper which concerns on the modification of 3rd Embodiment. The rear view of the fertilizer hopper of a modification. The side view which shows a mode that the seedling board was mounted on the fertilizer hopper of a modification. The side view which shows a mode that a seedling board is rotated in a modification. The side view which shows the fertilizer hopper of 4th Embodiment. The side view which shows a mode that the seedling board was mounted on the fertilizer hopper of 4th Embodiment. The side view which shows a mode that a seedling plate is rotated with a cover member in 4th Embodiment. The side view which shows the fertilizer hopper which concerns on the modification of 4th Embodiment. The side view of the rice transplanter which concerns on 5th Embodiment of this invention. The side view which shows a mode that the rear part seedling stand was flipped up. The figure which shows a mode that a seedling plate is rotated with a rear part preliminary seedling base in 5th Embodiment. The perspective view which shows the seedling box as a seedling collection member of a modification.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of an agricultural application work vehicle 1 according to the first embodiment of the present invention.

The spreading work vehicle 1 includes a vehicle body 2 and a direct seeding device (granular material spraying device) 8 disposed behind the vehicle body 2.

The vehicle body 2 includes a pair of left and right front wheels 4 and a rear wheel 5 and an engine 10 which is a drive source for the front wheel 4 and the rear wheel 5. In addition, a driver's seat 6 on which an operator rides is provided at a position between the front wheel 4 and the rear wheel 5 in the front-rear direction of the vehicle body 2. In front of the driver seat 6, a steering handle 7 for the operator to steer the vehicle body 2 is disposed.

The direct seeding device 8 is disposed behind the vehicle body 2. The direct seeding device 8 is attached to the vehicle body 2 via an elevating link mechanism 12 that is a connecting mechanism. The raising / lowering link mechanism 12 is comprised as a parallel link mechanism which can raise / lower the direct seeding apparatus 8. As shown in FIG. Thereby, the vertical position of the direct seeding apparatus 8 can be adjusted. A PTO shaft 13 for outputting the driving force of the engine 10 to the direct seeding device 8 is disposed at the rear part of the vehicle body 2.

Note that the vehicle body 2 of this embodiment has a so-called midship layout in which the engine 10 is disposed between the axles of the front wheels 4 and the rear wheels 5. A fuel tank (not shown) is disposed in the vicinity of the engine 10. However, the arrangement of the engine 10 and the fuel tank is not limited to this. For example, the engine 10 may be disposed in the hood at the front of the vehicle body or may be disposed at the rear of the vehicle body. Similarly, the fuel tank can be arranged at an arbitrary position such as in the hood at the front of the vehicle body or at the rear of the vehicle body.

The direct sowing device 8 is configured to spray seeds (seeds) on the ground little by little. The spreading work vehicle 1 can run seeds on the ground at substantially constant intervals by running while driving the direct sowing device 8.

In addition, the vehicle body 2 of the present embodiment is configured as an agricultural multipurpose work vehicle, and other types of work machines can be attached instead of the direct seeding device 8. That is, the direct seeding device 8 of the present embodiment is detachable from the lifting link mechanism 12 of the vehicle body 2. And the working mechanism for agriculture other than the direct sowing apparatus 8 (for example, rice planting apparatuses, such as the planting part 3 shown in 2nd Embodiment mentioned later, a weeding apparatus, etc.) can be attached to the raising / lowering link mechanism 12. FIG.

The direct sowing device 8 includes a frame 29, a seed feeding device (granular material feeding device) 9, and a hopper 20. The seed feeding device 9 includes a feeding case 21.

The frame 29 is connected to the lifting link mechanism 12 described above. The frame 29 is, for example, a square pipe-like member, and is disposed along the left-right direction of the vehicle body 2 as indicated by a dotted line in FIG. The case 29 is attached to the frame 29 at regular intervals in the left-right direction. The attachment of the frame 29 to the feeding case 21 can be performed using appropriate means such as bolt fastening.

</ RTI> The feeding case 21 provided in the seed feeding device 9 is configured to feed seeds little by little and release them toward the ground. The detailed configuration of the feeding case 21 will be described later. As shown in FIG. 2, the direct sowing device 8 of the present embodiment includes six seed feeding devices 9 (feeding cases 21) arranged side by side in the left-right direction so that six rows of seeds can be sprayed simultaneously.

The hopper 20 is a container for storing seeds (granular bodies) to be sown in the field. The hopper 20 is open at the top, and seeds can be introduced into the inside from the open top. Moreover, the hopper 20 is provided with the cover part 22 for covering the open upper part. The hopper 20 is fixed on the feeding case 21.

The lower portion of the hopper 20 is a passage portion 23 formed in a funnel shape so as to become thinner as approaching its lower end portion. Since the lower portion of the passage portion 23 is open, the seeds in the hopper 20 can be discharged to the seed feeding device 9 below the hopper 20 via the passage portion 23. In addition, the hopper 20 of this embodiment is comprised so that the seed for two strips may be accommodated. For this reason, as shown in FIG. 2, the lower portion of each hopper 20 is divided into two forks, and two passage portions 23 are formed in one hopper 20. And the feeding case 21 is being fixed to the lower part of each channel | path part 23. FIG. As shown in FIG. 2, the direct sowing apparatus 8 of the present embodiment includes six feeding cases 21 arranged in the left-right direction, and accordingly, includes three hoppers 20 arranged in the left-right direction.

Subsequently, the configuration of the feeding case 21 will be described in detail.

The feeding case 21 is made of resin and has a substantially box shape. As shown in FIG. 3, the upper part of the feeding case 21 is open and serves as an opening 21 a. The opening 21 a of the feeding case 21 communicates with the passage portion 23 of the hopper 20. Thereby, as shown in FIG. 5, the seeds in the hopper 20 are supplied into the feeding case 21 through the opening 21a.

As shown in FIG. 5, a feeding roll (feeding portion) 28 is provided inside the feeding case 21 and below the opening 21a. As shown in FIG. 8, the feeding roll 28 is configured as a substantially cylindrical member. As shown in FIG. 6, the feeding roll 28 is arranged so that its axis 28 c is parallel to the left-right direction of the vehicle body 2. Further, the feeding roll 28 is configured to be rotatable around the axis 28c. As shown in FIGS. 5 to 8, a feeding hole 28 a is formed in the peripheral surface of the feeding roll 28. A plurality of feeding holes 28 a are formed at equal intervals in the circumferential direction of the feeding roll 28.

As shown in FIG. 6, a driven gear 30 is provided outside the feeding case 21. The driven gear 30 is disposed such that its axis coincides with the axis 28 c of the feeding roll 28. The driven gear 30 is connected to the feeding roll 28 so as not to rotate relative to the feeding roll 28. Thereby, the driven gear 30 and the feeding roll 28 rotate integrally. Further, as shown in FIGS. 3 and 4, a driving gear 31 that meshes with the driven gear 30 and rotates is provided outside the feeding case 21.

Further, in the feeding case 21, a drive transmission shaft 32 is arranged in parallel with the left-right direction of the vehicle body. The drive transmission shaft 32 is arranged such that its axis coincides with the axis of the drive gear 31. The drive transmission shaft 32 and the drive gear 31 can be connected by a clutch mechanism 50 (details will be described later) shown in FIG. Accordingly, when the driving force is input to the drive transmission shaft 32 with the clutch mechanism 50 connected, the drive gear 31 is rotationally driven around the axis.

The direct seeding device 8 includes a drive output unit (not shown) that converts the rotational driving force of the engine 10 output from the PTO shaft 13 into an intermittent rotational motion and outputs it. The intermittent rotational motion output from the drive output unit is input to the drive input gear 70 and transmitted to the drive transmission shaft 32 to drive the drive gear 31 to rotate. When the drive gear 31 is rotationally driven in this manner, the driven gear 30 meshing with the drive gear 31 rotates, and the feeding roll 28 in the feeding case 21 is rotated.

With the above configuration, the feeding roll 28 in each feeding case 21 can be intermittently driven at a predetermined speed in one direction. A configuration for transmitting the driving force output from the drive output unit to the drive gear 31 will be described later.

In each feeding case 21, seeds supplied from the hopper 20 are taken into the feeding hole 28a by a predetermined amount (several grains) as shown in FIG. Here, the amount of seed taken into the feeding hole 28a may be referred to as “feeding amount”. When the feeding roll 28 is rotationally driven in one direction with the seed taken into the feeding hole 28a, the seed taken into the feeding hole 28a can be conveyed downward. The seed taken into the feeding hole 28a is discharged downward from the feeding hole 28a when the feeding hole 28a faces downward.

In the feeding case 21, the lower part of the feeding roll 28 is opened. Therefore, the seed discharged from the feeding hole 28a falls in the feeding case 21 as shown by the thick arrow in FIG. A lower part of the feeding case 21 is a sowing guide 37. The sowing guide 37 is configured in a substantially cylindrical shape, and seeds can pass up and down through the inside. A lower end portion of the sowing guide 37 is a discharge port 38 opened downward. The discharge port 38 is disposed close to the ground. Therefore, the seeds fed by the feeding roll 28 fall in the sowing guide 37 and fall to the ground via the discharge port 38.

By the feeding case 21 configured as described above, the seeds in the hopper 20 can be fed by a predetermined feeding amount and sprayed on the ground. In addition, as mentioned above, the direct sowing apparatus 8 is comprised so that each feeding roll 28 of the six feeding cases 21 can be rotationally driven simultaneously. Therefore, the direct sowing apparatus 8 of the present embodiment can simultaneously spray the seeds for six strips.

Then, the characteristic structure of the direct seeding apparatus 8 of this embodiment is demonstrated.

As described above, the feeding case 21 of the present embodiment is provided with the driven gear 30 and the drive gear 31 that meshes with the driven gear 30 and rotates.

The driven gear 30 is supported on the side wall of the feeding case 21 (the left side wall 33 in this embodiment).

More specifically, the support structure of the driven gear 30 is as follows. As shown in FIGS. 6 and 7, the driven gear 30 is fixedly provided with a cylindrical portion 45 that is formed in a cylindrical shape so that its axis coincides with the rotation axis of the driven gear 30. In the present embodiment, the cylindrical portion 45 is formed integrally with the driven gear 30.

As shown in FIG. 7, an insertion hole 46 through which the cylindrical portion 45 can be inserted is formed in the left side wall 33 of the feeding case 21. The insertion hole 46 is configured as a round hole, and the diameter thereof is configured to substantially match the outer diameter of the cylindrical portion 45. Further, in a state where the cylindrical portion 45 is inserted into the insertion hole 46, the cylindrical portion 45 can rotate around the axis.

With the above configuration, the driven gear 30 is inserted into the insertion hole 46 formed in the left side wall 33 of the feeding case 21 so that the driven gear 30 is inserted into the left side wall 33 of the feeding case 21. Is supported rotatably. A bearing (for example, a sliding bearing) may be provided between the inner peripheral surface of the insertion hole 46 and the outer peripheral surface of the cylindrical portion 45.

Thus, since the driven gear 30 is rotatably supported by the left side wall 33 of the feeding case 21, the left side wall 33 can also be referred to as a “driven gear support portion”.

As shown in FIG. 3, the feeding case 21 is provided with a drive gear support 49 in a fixed manner. The drive gear support 49 is a rib-shaped portion that protrudes forward from the front surface of the feeding case 21. In the present embodiment, the drive gear support 49 is integrally formed with the left side wall 33 (driven gear support). The drive gear 31 is supported by a drive gear support portion 49.

A specific description of the support structure of the drive gear 31 is as follows. As shown in FIG. 9, the drive gear 31 is fixedly provided with a cylindrical portion 47 formed in a cylindrical shape with the axis line coincident with the rotation axis of the drive gear 31. In the present embodiment, the cylindrical portion 47 is formed integrally with the drive gear 31.

The drive gear support 49 is formed with an insertion hole (not shown) through which the cylindrical portion 47 can be inserted in the left-right direction. This insertion hole is configured as a round hole, and the diameter thereof is configured to substantially match the outer diameter of the cylindrical portion 47. Further, in a state where the cylindrical portion 47 is inserted into the insertion hole, the cylindrical portion 47 can rotate about the axis.

With the above configuration, by inserting the cylindrical portion 45 integrally formed with the drive gear 31 into the insertion hole formed in the drive gear support portion 49, the drive gear 31 is rotatably supported by the drive gear support portion 49. Has been. A bearing (for example, a sliding bearing) may be provided between the inner peripheral surface of the insertion hole formed in the drive gear support portion 49 and the outer peripheral surface of the cylindrical portion 45.

In a state where the drive gear 31 is supported by the drive gear support 49 and the driven gear 30 is supported by the left side wall 33 (driven gear support) of the feeding case 21, the drive gear 31 and the driven gear 30 are engaged with each other. It is configured (state shown in FIGS. 3 and 4).

Incidentally, as described above, the drive gear support 49 is provided in the feeding case 21. Therefore, it can also be said that the drive gear 31 is supported by the feeding case 21. Further, since the driven gear 30 is supported by the left side wall 33 of the feeding case 21, it can be said that the driven gear 30 is supported by the feeding case 21.

Thus, the direct seeding device 8 of the present embodiment supports both the drive gear 31 and the driven gear 30 by the feeding case 21. As a result, the meshing between the

gears

30 and 31 is stabilized.

For example, in Patent Document 1, the driven gear is supported by the feeding case, and the drive gear is supported by the bracket. For this reason, the distance between the driven gear and the driving gear (between the cores) varies due to the influence of the mounting case mounting accuracy with respect to the bracket, and as a result, the engagement between the driven gear and the driving gear may be deteriorated.

On the other hand, in the present embodiment, since both the drive gear 31 and the driven gear 30 are supported by the feeding case 21, the distance between the cores of the

gears

30 and 31 is determined only by the accuracy of the feeding case 21. Thereby, the dispersion | variation between cores can be suppressed to the minimum and it can prevent that mesh | engagement of

gears

30 and 31 worsens.

In particular, in this embodiment, the driven gear support portion (the left side wall of the feeding case 21) and the drive gear support portion 49 are integrally formed. Accordingly, the distance between the cores of the

gears

30 and 31 is determined only by the molding accuracy of the feeding case 21 and is not affected by the assembly accuracy. As a result, the meshing between the drive gear 31 and the driven gear 30 is further stabilized.

Subsequently, the drive transmission shaft 32 of the present embodiment will be described.

In the direct seeding device 8 of the present embodiment, the drive transmission shaft 32 is provided independently for each feeding case 21. In addition, since the direct seeding apparatus 8 of this embodiment is provided with six feeding cases 21, it is provided with six drive transmission shafts 32.

The direct seeding device 8 includes a connecting part that connects adjacent drive transmission shafts 32 to each other. The connecting portion of this embodiment includes a connecting shaft 68 and a connecting member 69.

3, the end of the drive transmission shaft 32 and the end of the connecting shaft 68 are connected by a connecting member 69. Notches (so-called D cuts) 71 and the like are appropriately formed at the ends of the drive transmission shaft 32 and the connecting shaft 68, respectively. The connecting member 69 is configured to fit into the notch 71. Thereby, the drive transmission shaft 32 and the connecting shaft 68 can be connected by the connecting member 69 so as not to be relatively rotatable.

As shown in FIG. 2, a connecting shaft 68 is disposed between the feeding cases 21. In the direct seeding device 8 of the present embodiment, the drive transmission shafts 32 of the adjacent feeding cases 21 are connected to each other by the connecting portion (the connecting shaft 68 and the connecting member 69) with the above configuration. In addition, since the direct sowing apparatus 8 of this embodiment is provided with six feeding cases 21, it is provided with five connecting shafts 68 in total. As shown in FIG. 3, the connecting shaft 68 is connected to the end of the drive transmission shaft 32 through a connecting member 69. With the above configuration, the six drive transmission shafts 32 included in the direct seeding device 8 are coupled to each other via the coupling shaft 68 (and the coupling member 69).

A drive input gear 70 is fixed to any one of the five connecting shafts 68 included in the direct seeding device 8. As shown in FIG. 2, in the present embodiment, the drive input gear 70 is fixed to the central connecting shaft 68 among the five connecting shafts 68.

The driving force output from the driving output unit described above is input to the driving input gear 70. When the driving force is input to the driving input gear 70, the driving input gear 70 is rotationally driven. Thus, the drive input gear 70 is rotationally driven, whereby the six drive transmission shafts 32 included in the direct seeding device 8 can be rotationally driven.

With the above configuration, the drive transmission shafts 32 of the six feeding cases 21 can be rotationally driven all at once.

Subsequently, the clutch mechanism 50 provided in the feeding case 21 of the present embodiment will be described. The clutch mechanism 50 switches connection / disconnection between the drive transmission shaft 32 and the drive gear 31.

As shown in FIG. 3, the clutch mechanism 50 includes a clutch member 53. As shown in FIG. 9, the axial center portion of the drive transmission shaft 32 is a hexagonal shaft portion 52 having a hexagonal cross section. The clutch member 53 is attached to the hexagonal shaft portion 52 so as not to be relatively rotatable. The clutch member 53 is slidable in a direction parallel to the axis of the drive transmission shaft 32 (a direction indicated by a thick arrow in FIG. 9).

The both ends of the drive transmission shaft 32 are formed in a round bar shape with a circular cross section. As shown in FIGS. 3 and 9, the drive gear 31 is attached to one end portion (round bar-like portion) of the drive transmission shaft 32. The drive gear 31 is configured to be able to rotate relative to the drive transmission shaft 32 around the axis.

As shown in FIG. 9, the clutch member 53 is formed with a clutch-side engagement portion 54 that protrudes toward the drive gear 31. As shown in FIG. 9, the cylindrical portion 47 formed integrally with the drive gear 31 has a gear side engaging portion 55 that engages with the clutch side engaging portion 54 on the surface facing the clutch member 53 side. Is formed.

When the clutch side engaging portion 54 and the gear side engaging portion 55 are engaged, the drive gear 31 and the clutch member 53 are connected so as not to be relatively rotatable. As described above, since the clutch member 53 is not relatively rotatable with respect to the drive transmission shaft 32, the drive transmission shaft 32 and the drive gear are engaged by the engagement of the clutch side engagement portion 54 and the gear side engagement portion 55. 31 is connected so that relative rotation is impossible. Thereby, a driving force can be transmitted from the drive transmission shaft 32 to the drive gear 31.

As described above, the clutch member 53 is slidable in the axial direction of the drive transmission shaft 32. By sliding the clutch member 53 in the direction away from the drive gear 31, the engagement of the clutch side engaging portion 54 and the gear side engaging portion 55 can be released. As a result, the connection between the drive gear 31 and the drive transmission shaft 32 is released. Accordingly, the driving force is not transmitted from the drive transmission shaft 32 to the drive gear 31.

In the clutch mechanism 50 configured as described above, the state in which the drive gear 31 is connected to the drive transmission shaft 32 and the connection between the drive gear 31 and the drive transmission shaft 32 are released by sliding the clutch member 53. The state can be switched. Since the drive transmission shaft 32 is rotationally driven as described above, the drive gear 31 can be rotationally driven by connecting the drive gear 31 to the drive transmission shaft 32. When the drive gear 31 is rotationally driven, the driven gear 30 (FIG. 4) meshing with the drive gear 31 is rotationally driven, so that the feeding roll 28 (FIG. 6) connected to the driven gear 30 so as not to be relatively rotatable. ) Is driven to rotate. Thereby, the feeding roll 28 in the feeding case 21 can be rotationally driven.

In the present embodiment, as described above, the drive transmission shafts 32 of the respective feeding cases 21 can be rotationally driven at the same time by connecting the drive transmission shafts 32 to each other by the connecting portions (the connecting shaft 68 and the connecting member 69). Therefore, by connecting the drive gear 31 and the drive transmission shaft 32 in the clutch mechanism 50 of each feeding case 21, the feeding rolls 28 of each feeding case 21 can be driven all at once. Therefore, seeds can be sprayed all at once by the six feeding cases 21 provided in the direct sowing apparatus 8.

On the other hand, if the coupling between the drive gear 31 and the drive transmission shaft 32 is released by sliding the clutch member 53, the rotation of the drive gear 31 can be stopped. Thereby, rotation of the supply roll 28 in the supply case 21 can be stopped. In the direct seeding device 8 of the present embodiment, since the clutch mechanism 50 is provided in each feeding case 21, whether or not the feeding roll 28 is driven can be switched for each feeding case 21. Therefore, the driving of the feeding roll 28 can be stopped only in a part of the feeding cases 21 and the seed spraying can be stopped.

Further, the frame 29 provided in the direct seeding device 8 is provided with an operation member (not shown) that moves the clutch member 53 along the axial direction of the drive transmission shaft 32. This operation member is provided corresponding to each feeding case 21. This operation member can be arbitrarily operated by an operator on the driver's seat. Thereby, the operator can switch the presence / absence of driving of the feeding roll 28 for each feeding case 21.

Subsequently, the support structure of the drive transmission shaft 32 in this embodiment will be described. As shown in FIG. 3, the drive gear 31 is attached to one end portion (left end portion) of the drive transmission shaft 32. As described above, the drive gear 31 is supported by the feeding case 21. Accordingly, it can be said that the left end portion of the drive transmission shaft 32 is supported by the feeding case 21 via the drive gear 31.

As shown in FIG. 3, the feeding case 21 is integrally provided with a transmission shaft support portion 48 for supporting the other end portion (right end portion) of the drive transmission shaft 32. The transmission shaft support 48 supports the right end of the drive transmission shaft 32 via a bearing. As described above, both ends of the drive transmission shaft 32 are supported by the feeding case 21.

As described above, the clutch member 53 is attached to the drive transmission shaft 32. Accordingly, it can be said that the clutch member 53 is supported by the feeding case 21 via the drive transmission shaft 32. As described above, the clutch mechanism 50 of the present embodiment is supported by the feeding case 21.

As described above, in this embodiment, the drive transmission shaft 32, the clutch mechanism 50, and the drive gear 31 are individually provided for each feeding case 21, and these configurations are supported by the feeding case 21. Thereby, the drive transmission shaft 32, the clutch mechanism 50, the drive gear 31, and the feeding case 21 can be collectively handled as one unit. Therefore, when assembling the direct seeding device 8 of the present embodiment, the drive transmission shaft 32, the clutch mechanism 50, the drive gear 31 and the like are assembled in advance in the feeding case 21, and then the feeding case 21 is attached to the frame 29. good. Thereby, the assembly of the direct seeding apparatus 8 becomes easy.

Subsequently, in the direct sowing apparatus 8 of the present embodiment, a configuration for adjusting the amount of seeds fed (the amount of seed spread) by the feeding roll 28 will be described.

The feeding roll 28 of the present embodiment is configured as a slide roll type feeding roll capable of adjusting the capacity of the feeding hole 28a. That is, as shown in FIGS. 6 to 8, the feeding roll 28 is configured by combining the main body roll 57 and the fitting roll 58. The fitting roll 58 is slidable in the direction parallel to the axis 28 c with respect to the main body roll 57.

As shown in FIG. 8, the main body roll 57 and the fitting roll 58 are each formed in a substantially cylindrical shape. On the peripheral surface of the main body roll 57, the aforementioned feeding hole 28a is formed. The feed hole 28a is configured as a groove formed along a direction parallel to the axis 28c. The fitting roll 58 is formed with a protruding portion 60 formed so as to protrude in a direction parallel to the axis 28c. A plurality of the projecting portions 60 are formed corresponding to the feeding holes 28 a of the main body roll 57. And as shown in FIG. 8, the protrusion part 60 of the fitting roll 58 is comprised so that it can insert in the direction parallel to the axis line 28c inside the delivery hole 28a of the main body roll 57. As shown in FIG. A portion of the feeding hole 28 a where the protruding portion 60 is inserted is closed by the protruding portion 60. Therefore, the capacity of the feeding hole 28a can be changed by changing the amount of the protrusion 60 inserted into the feeding hole 28a.

With the above configuration, the capacity of the feeding hole 28a can be changed by moving the fitting roll 58 in a direction parallel to the axis 28c with respect to the main body roll 57. Thereby, the amount (feeding amount) of seeds fed out by the feeding hole 28a can be adjusted.

As shown in FIG. 7, the feeding roll 28 provided in the feeding case 21 is provided with a screw feeding mechanism (adjusting mechanism) 40 for adjusting the position of the fitting roll 58 in a direction parallel to the axis 28c.

The screw feed mechanism 40 has a screw shaft (adjustment shaft) 41 disposed in alignment with the axis 28c of the feeding roll 28. Accordingly, the screw shaft 41 is disposed in parallel with the left-right direction of the vehicle body. A male screw is formed on the outer periphery of the screw shaft 41. On the other hand, the fitting roll 58 is formed with a female screw that is screwed into the male screw. With this configuration, by rotating the screw shaft 41, the fitting roll 58 can be moved in a direction parallel to the axis 28c, and the capacity of the feeding hole 28a can be changed.

As shown in FIG. 7, an adjustment gear 61 for operating the screw feeding mechanism 40 is provided outside the feeding case 21. The adjustment gear 61 is configured as a flat gear, is arranged so that the screw shaft 41 and the axis line coincide with each other, and is fixed to the screw shaft 41. As shown in FIGS. 3 and 10, an operation gear 62 that can mesh with the adjustment gear 61 is provided outside the feeding case 21. The operation gear 62 is configured as a flat gear, and its axis is disposed along a direction (left-right direction) parallel to the screw shaft 41.

In a state where the operation gear 62 is engaged with the adjustment gear 61, the operation gear 62 is rotated to rotate the screw shaft 41 via the adjustment gear 61, and the screw feed mechanism 40 causes the fitting roll 58 to move. It is moved in a direction parallel to the axis 28c. Thereby, the capacity | capacitance of the feeding hole 28a can be changed and the quantity (feeding quantity) which the said feeding hole 28a delivers a seed can be adjusted.

As shown in FIG. 7, a flange portion 42 is provided at the end of the screw shaft 41. A detent mechanism 43 is provided between the flange portion 42 and the main body roll 57. This detent mechanism 43 is connected so that the main body roll 57 and the screw shaft 41 do not rotate relative to each other. Thereby, the fitting roll 58 and the screw shaft 41 are prevented from rotating relative to each other, and the position of the fitting roll 58 is prevented from moving freely in the direction of the axis 28c.

The detent mechanism 43 is configured to allow relative rotation between the main body roll 57 and the screw shaft 41 when a predetermined torque or more is applied. Therefore, by inputting a predetermined torque to the adjustment gear 61, the screw shaft 41 and the fitting roll 58 can be rotated relative to each other to operate the screw feed mechanism 40.

Subsequently, the support structure of the operation gear 62 will be described.

That is, the operation gear 62 can be supported by a member (for example, the frame 29) different from the feeding case 21. However, if the operation gear 62 is supported by the frame 29, the gap between the cores of the operation gear 62 and the adjustment gear 61 varies due to the influence of the mounting accuracy of the feeding case 21 with respect to the frame 29. For this reason, it is conceivable that the engagement between the operation gear 62 and the adjustment gear 61 is deteriorated.

Therefore, in the direct seeding device 8 of the present embodiment, the operation gear 62 is supported by the feeding case 21. Specifically, as shown in FIG. 3, an operation gear support portion 73 protruding in a rib shape toward the front is provided on the front surface of the feeding case 21. The operation gear support 73 is configured to rotatably support the operation gear 62. Note that the operation gear support portion 73 of this embodiment is formed integrally with the feeding case 21.

Thus, in the present embodiment, since the operation gear 62 is supported by the feeding case 21, the distance between the operation gear 62 and the adjustment gear 61 is determined only by the accuracy of the feeding case 21. Thereby, since the meshing of the adjustment gear 61 and the operation gear 62 is stabilized, the adjustment of the seed feeding amount by the feeding hole 28a can be stably performed.

A mechanism for changing the capacity of the feeding hole 28a (the screw feeding mechanism 40, the adjustment gear 61, the operation gear 62, the detent mechanism 43, etc.) is provided in each of the six feeding cases 21 provided in the direct seeding device 8. ing. Therefore, the direct seeding device 8 of the present embodiment has six operation gears 62. As shown in FIG. 2, the operation gears 62 of the adjacent feeding cases 21 are connected by a connecting shaft 63 arranged along the left-right direction of the vehicle body.

Specifically, it is as follows. That is, as shown in FIG. 3, the operation gear 62 is fixedly provided with a cylindrical rotating shaft portion 65 that is arranged so that the axis line coincides with the operation gear 62. In the present embodiment, the operation gear 62 and the rotating shaft portion 65 are integrally formed. The operation gear 62 and the rotating shaft portion 65 are configured so that the connecting shaft 63 can be inserted through the center of the shaft. The rotating shaft 65 is fixed so as not to rotate relative to the connecting shaft 63.

In the direct seeding device 8 of the present embodiment, only one connecting shaft 63 is provided. Six operation gears 62 are fixed to the connecting shaft 63. Accordingly, the six operation gears 62 included in the direct seeding device 8 are connected by the connecting shaft 63 so that the axes thereof coincide with each other so as not to be relatively rotatable. Accordingly, the six operation gears 62 can be rotated all at once.

As shown in FIG. 2, an operation handle 64 is provided at the end of a connecting shaft 63 that connects the six operation gears 62 to each other. The operator can simultaneously rotate the operation gears 62 of the six feeding cases 21 by rotating the operation handle 64. With the above configuration, the capacity of the feeding hole 28 a of the feeding roll 28 can be changed simultaneously by the six feeding cases 21. That is, the feeding amount for the six articles can be changed all at once. Thereby, the amount of feeding can be changed easily.

As described above, the detent mechanism 43 is provided between the main body roll 57 and the screw shaft 41. Thereby, the supply roll 28 and the screw shaft 41 are connected so as not to rotate relative to each other. For this reason, the screw shaft 41 (and the adjustment gear 61 fixed thereto) is rotationally driven with the rotational driving of the feeding roll 28. At this time, if the operation gear 62 is engaged with the adjustment gear 61, the operation gear 62 is also rotationally driven. When the adjustment gear 61 and the operation gear 62 are rotationally driven in a state where they are engaged with each other as described above, the operation gear 62 and the adjustment gear 61 may be worn and may be damaged.

By the way, the operation gear 62 and the adjustment gear 61 need to be engaged only when the capacity of the supply hole 28a is changed (adjustment of the supply amount). In other cases, the operation gear 62 and the adjustment gear 61 are engaged. You don't have to.

Therefore, in this embodiment, the presence / absence of engagement of the operation gear 62 and the adjustment gear 61 can be switched as necessary.

As shown in FIGS. 3 and 5, the feeding case 21 of the embodiment is fixedly provided with an operation gear support 73 that protrudes in a rib shape from the front of the feeding case 21 toward the front. . Note that the operation gear support portion 73 of this embodiment is formed integrally with the feeding case 21.

As shown in FIGS. 3 and 5, etc., the operation gear support 73 has a long hole 72 formed therein. The elongated hole 72 is formed so as to penetrate the operation gear support portion 73 in the axial direction (left-right direction) of the operation gear 62. Further, the width of the elongated hole 72 is formed to be the same as or slightly larger than the diameter of the rotating shaft portion 65 of the operation gear 62. Therefore, the rotating shaft portion 65 can be inserted through the elongated hole 72 in the axial direction (left-right direction) (state shown in FIG. 3). As described above, the operation gear support portion 73 can support the operation gear 62 by inserting the rotary shaft portion 65 of the operation gear 62 into the long hole 72.

Further, the rotating shaft portion 65 can move in the longitudinal direction of the long hole 72 while being inserted into the long hole 72. As shown in FIG. 5, when viewed in the axial direction (left-right direction) of the screw shaft 41, one end portion 72a in the longitudinal direction of the long hole 72 is more threaded than the other end portion 72b. It is close to the position. Accordingly, by moving the rotary shaft portion 65 inserted through the long hole 72 between the

end portions

72a and 72b, the rotary shaft portion 65 is moved closer to the rotary shaft (screw shaft 41) of the adjustment gear 61. Or it can be moved in the direction of separation.

A state in which the rotating shaft portion 65 of the operation gear 62 moves inside the elongated hole 72 will be described with reference to FIGS. 10 and 11. 10 and 11, the operation gear 62 is indicated by a two-dot chain line in order to easily illustrate the rotating shaft portion 65.

As shown in FIGS. 10 and 11, of the end portions in the longitudinal direction of the long holes 72, the side close to the screw shaft 41 side is defined as an approach side end portion 72 a. That is, if the rotary shaft 65 is moved to the maximum extent toward the screw shaft 41 inside the long hole 72, the rotary shaft 65 comes into contact with the approaching side end 72a (state of FIG. 10). In this state, as shown in FIG. 10, the operation gear 62 and the adjustment gear 61 are configured to mesh with each other.

As shown in FIG. 10 and FIG. 11, among the end portions in the longitudinal direction of the long holes 72, the end portion on the opposite side to the approach side end portion 72a is defined as a separation side end portion 72b. That is, if the rotary shaft portion 65 is moved to the maximum in the direction away from the screw shaft 41 inside the long hole 72, the rotary shaft portion 65 comes into contact with the separation-side end portion 72b (state of FIG. 11). In this state, as shown in FIG. 11, the engagement between the operation gear 62 and the adjustment gear 61 is released.

As described above, according to the configuration of the present embodiment, the position between the position where the operation gear 62 is engaged with the adjustment gear 61 (FIG. 10) and the position where the engagement with the adjustment gear 61 is released (FIG. 11). It can be moved with. Thereby, the presence or absence of meshing of the operation gear 62 and the adjustment gear 61 can be switched.

Further, in the present embodiment, as described above, the rotation shaft portion 65 of the operation gear 62 is configured to move inside the long hole 72, and therefore the movement range of the rotation shaft portion 65 is in the longitudinal direction of the long hole 72. Regulated by the edge. That is, the rotating shaft portion 65 cannot further approach the screw shaft 41 from the state in which the rotating shaft portion 65 is in contact with the approaching end portion 72a of the long hole 72 (the state in FIG. 10). Further, the rotating shaft portion 65 cannot further move away from the screw shaft 41 from the state in which the rotating shaft portion 65 is in contact with the separation-side end portion 72b of the long hole 72 (state in FIG. 11).

Thus, in this embodiment, since the moving range of the rotating shaft part 65 of the operation gear 62 can be regulated by the long hole 72, the operation gear 62 is prevented from being too close or too far from the adjustment gear 61. it can.

In the present embodiment, as described above, the operation gear support portion 73 in which the long hole 72 is formed is formed integrally with the feeding case 21. Accordingly, the accuracy of the position and shape of the long hole 72 is determined solely by the molding accuracy of the feeding case 21 and is not affected by the assembly accuracy. Thereby, the long hole 72 can be accurately arranged with respect to the feeding case 21.

Therefore, the rotating shaft portion 65 can be accurately positioned with respect to the screw shaft 41 by bringing the rotating shaft portion 65 into contact with the approaching end portion 72a of the long hole 72 (state of FIG. 10). Thereby, variation in the distance (between the cores) between the rotation shaft (rotation shaft portion 65) of the operation gear 62 and the rotation shaft (screw shaft 41) of the adjustment gear 61 can be suppressed. Therefore, according to the configuration of the present embodiment, the operation gear 62 and the adjustment gear 61 can be meshed stably.

As described above, the rotary shaft portions 65 of the six operation gears 62 included in the direct seeding device 8 of the present embodiment are connected by the connecting shaft 63. Therefore, when the rotary shaft 65 is moved in a direction approaching or separating from the screw shaft 41, the six operation gears 62 included in the direct seeding device 8 are moved all at once. That is, according to the configuration of the present embodiment, the presence / absence of engagement between the operation gear 62 and the adjustment gear 61 can be switched simultaneously by the six feeding cases 21.

By the way, as a method of switching the presence / absence of engagement between gears, in addition to a method of moving the gear shafts in the direction of approaching or separating from each other as in the present embodiment, There is a method for switching the presence / absence of engagement between gears. However, in the case of the method of switching the presence / absence of meshing by shifting the gear in the axial direction, it is necessary to provide a chamfer on the end surfaces of the gear teeth of both gears in order to mesh the gears again, which is costly There is.

In this respect, in this embodiment, as described above, the operation gear 62 is moved by moving the rotation shaft portion 65 of the operation gear 62 in the direction of approaching or separating from the rotation shaft (screw shaft 41) of the adjustment gear 61. Therefore, the chamfer for meshing the operation gear 62 and the adjustment gear 61 is not necessary. Thereby, the operation gear 62 and the adjustment gear 61 can be configured at low cost, and the cost of the direct seeding device 8 as a whole can be reduced.

Subsequently, a configuration for performing an operation so as to switch the presence / absence of engagement between the operation gear 62 and the adjustment gear 61 will be described. In the direct seeding apparatus of the present embodiment, the operation gear 62 is moved by a link mechanism, so that the presence / absence of engagement between the operation gear 62 and the adjustment gear 61 is switched. As shown in FIGS. 10 and 11, the link mechanism of this embodiment includes an inter-core change link (link member) 75 and a link operation shaft 76.

The link operation shaft 76 is a round bar-shaped member arranged along a direction (left-right direction) parallel to the screw shaft 41. As shown in FIG. 4 and the like, the feeding case 21 is formed with a round hole 77 into which the link operation shaft 76 can be inserted. The link operation shaft 76 is rotatably supported by the feeding case 21 by being inserted into the round hole 77. As shown in FIG. 2, the link operation shaft 76 is disposed across a plurality of (six in the case of this embodiment) feeding cases 21 included in the direct seeding device 8.

As shown in FIG. 2, an operation lever 81 is fixedly provided at the end of the link operation shaft 76. The operator can rotate the link operation shaft 76 by rotating the operation lever 81.

The link change shaft 75 is fixed to the link operation shaft 76. The center-to-center change link 75 is a substantially plate-like member disposed substantially orthogonal to the link operation shaft 76. By rotating the link operation shaft 76 about the axis, the center-to-center change link 75 fixed to the link operation shaft 76 is made a plane orthogonal to the axial direction (left-right direction) of the screw shaft 41 (FIGS. 10 and 11). In the plane parallel to the paper surface). In the present embodiment, the center-to-center change link 75 is provided corresponding to each feeding case 21.

As shown in FIGS. 10 and 11, projecting

portions

79 and 80 projecting toward the side substantially opposite to the link operation shaft 76 are formed at the tip of the inter-center changing link 75. As shown in FIGS. 10 and 11, the

protrusions

79 and 80 are arranged so as to overlap the elongated hole 72 when viewed in the axial direction (left-right direction) of the screw shaft 41. 10 and 11, when viewed in the axial direction (left and right direction) of the screw shaft 41, the longitudinal direction (protruding direction) of the projecting

portions

79 and 80 is substantially the same as the longitudinal direction of the long hole 72. It arrange | positions so that it may orthogonally cross. The interval between the two protruding

portions

79 and 80 is set to be approximately the same as the diameter of the rotating shaft portion 65 of the operation gear 62. Accordingly, as shown in FIGS. 10 and 11, the rotary shaft portion 65 inserted into the long hole 72 is configured to be fitted between the two projecting

portions

79 and 80. Yes.

Thus, the two projecting

portions

79 and 80 of the inter-center changing link 75 are configured to be able to contact the rotating shaft portion 65 inserted in the long hole 72. Then, by rotating the center-to-center change link 75 around the link operation shaft 76, the rotary shaft portion 65 can be moved along the longitudinal direction of the long hole 72 inside the long hole 72. it can.

The center-to-center change link 75 is in a state where the rotary shaft portion 65 is in contact with the approaching side end portion 72a of the long hole 72 (the state shown in FIG. It is comprised so that it can rotate between the made state (state of FIG. 11). Accordingly, by rotating the inter-center change link 75 around the link operation shaft 76, the operation gear 62 is engaged with the adjustment gear 61 (FIG. 10), the disengagement position (FIG. 11), It can be moved between.

As described above, the operation lever 81 is fixedly provided on the link operation shaft 76 to which the center change link 75 is fixed. Accordingly, the operator can rotate the inter-link changing link 75 around the link operation shaft 76 by rotating the operation lever 81. Here, the position of the operation lever 81 when the operation gear 62 and the adjustment gear 61 are engaged with each other (the state shown in FIG. 10) is defined as a first position. Further, the position of the operation lever 81 in a state where the engagement between the operation gear 62 and the adjustment gear 61 is released (the state shown in FIG. 11) is defined as a second position. That is, the operator can engage the operation gear 62 and the adjustment gear 61 by rotating the operation lever 81 to the first position. Further, the operator can release the engagement between the operation gear 62 and the adjustment gear 61 by rotating the operation lever 81 to the second position.

Subsequently, the shape of the long hole 72 will be described in more detail. As shown in FIG. 12, in this embodiment, when viewed in the axial direction of the screw shaft 41, the long hole 72 has its longitudinal direction along a virtual circle C 1 centered on the axis of the link operation shaft 76. Are formed. Accordingly, the rotary shaft portion 65 inserted into the elongated hole 72 performs an arc motion around the link operation shaft 76 along the virtual circle C1 (indicated by a one-dot chain line in FIG. 12). .

The moving direction when the rotating shaft 65 moves in the direction approaching the screw shaft 41 is indicated by a white arrow A1 in FIG. As described above, the arrow A 1 is along the virtual circle C 1 centered on the axis of the link operation shaft 76.

As shown in FIG. 12, when viewed in the axial direction of the screw shaft 41, the arrow A1 is configured to face a direction shifted from the axial center P1 of the screw shaft 41. That is, when the rotary shaft 65 moves in the direction approaching the screw shaft 41, the rotary shaft portion 65 does not move straight toward the axis center P1 of the screw shaft 41 but moves toward a position shifted from the axis center P1. .

With the above configuration, the gear teeth of the operation gear 62 approach the gear teeth of the adjustment gear 61 from an oblique direction. As a result, when the gear teeth of the adjustment gear 61 and the operation gear 62 come into contact with each other, the gear teeth of the adjustment gear 61 are pushed diagonally by the gear teeth of the operation gear 62. Can mesh. Therefore, the gears can be reliably engaged with each other.

If the rotary shaft 65 is moved straight toward the axis center P1 of the screw shaft 41 (when the arrow A1 faces the axis center P1 of the screw shaft 41), the operation gear 62 and the adjustment gear are used. 61 gear teeth may collide from the front. In this case, not only the gear teeth cannot be meshed but also the gear teeth can be damaged. In this regard, according to the configuration of the present embodiment, as described above, the gear teeth of the operation gear 62 and the adjustment gear 61 come in contact with each other from an oblique direction. Can be prevented.

In the present embodiment, as shown in FIG. 10, a holding portion 82 for holding the position of the operation gear 62 is provided. The holding portion 82 includes a first locking portion 83 and a second locking portion 84. The first locking portion 83 and the second locking portion 84 are configured so that the operation lever 81 can be locked (hooked) and fixed.

As shown in FIG. 10, the first locking portion 83 is configured so that the operation lever 81 can be fixed at the first position by locking (hooking) the operation lever 81 with the first locking portion 83. Has been.

Therefore, the operator only needs to lock the operation lever 81 to the first locking portion 83 when adjusting the amount of seed fed by the feeding roll 28. According to this, the operation gear 62 can be held at a position (FIG. 10) meshed with the adjustment gear 61. Accordingly, the operator can rotate the adjustment gear 61 via the operation gear 62 by rotating the operation handle 64 in this state. Therefore, the screw feeding mechanism 40 is operated to feed the feeding hole 28a of the feeding roll 28. You can change the capacity. Thereby, the feeding amount can be adjusted.

Further, as shown in FIG. 11, the second locking portion 84 can fix the operation lever 81 in the second position by locking (hooking) the operation lever 81 with the second locking portion 84. It is configured.

Therefore, when the operator does not adjust the feeding amount, the operator may lock the operation lever 81 with the second locking portion 84. According to this, the operation gear 62 can be held at a position where it does not mesh with the adjustment gear 61 (FIG. 11). In this way, the operation gear 62 and the adjustment gear 61 can be prevented from meshing except when necessary, so that the operation gear 62 and the adjustment gear 61 can be prevented from being worn or damaged.

As described above, the seed feeding device 9 included in the direct sowing device 8 of the present embodiment includes the feeding case 21 that is arranged below the hopper 20 that accommodates seeds and is supplied with the seeds. In the feeding case 21, a feeding roll 28 for feeding seeds by a predetermined amount is provided. The feeding case 21 includes a driven gear support (a left side wall 33 of the feeding case 21) that supports a driven gear 30 that rotates integrally with the feeding roll 28, and a driving gear support that supports a driving gear 31 that meshes with the driven gear 30. Part 49.

Thus, by supporting both the driven gear 30 and the driving gear 31 on the feeding case 21, the distance between the cores of the driven gear 30 and the driving gear 31 is determined only by the accuracy of the feeding case 21. Thereby, the dispersion | variation between the cores of the driven gear 30 and the drive gear 31 can be suppressed, and the meshing precision of the

gears

30 and 31 can be improved.

Further, as described above, in the seed feeding device 9 of the present embodiment, the driven gear support (the left side wall 33 of the feeding case 21) and the drive gear support 49 are integrally formed.

Thus, by integrally forming the driven gear support portion and the drive gear support portion 49, the positions of the driven gear support portion and the drive gear support portion 49 are determined only by the forming accuracy of the feeding case. Therefore, the center of the driven gear 30 and the drive gear 31 is not affected by the assembly accuracy. Thereby, the meshing accuracy of the

gears

30 and 31 can be further improved.

Further, as described above, the seed feeding device 9 of the present embodiment includes a plurality of feeding cases 21. Each feeding case 21 includes a drive transmission shaft 32 that is arranged so that the axis line coincides with the drive gear 31 and transmits a driving force to the drive gear 31. The drive transmission shaft 32 is provided independently for each feeding case 21. Each feeding case 21 includes a transmission shaft support portion 48 that supports the drive transmission shaft 32. The seed feeding device 9 includes a connecting shaft 68 that connects the drive transmission shafts 32 of the adjacent feeding cases 21.

Thus, since the drive transmission shaft 32 is provided independently for each feeding case 21, the feeding case 21 and the drive transmission shaft 32 can be collectively handled as one unit. Then, the driving force can be transmitted to all the drive transmission shafts 32 by connecting the drive transmission shafts 32 of the adjacent feeding cases 21 by the connection shaft 68.

Further, as described above, the seed feeding device 9 of the present embodiment includes the clutch mechanism 50 between the drive transmission shaft 32 and the drive gear 31 in each feeding case 21.

That is, in the present embodiment, the drive transmission shaft 32 is individually provided for each feeding case 21. If the clutch mechanism 50 is provided for each feeding case 21 in addition to this, the driving transmission shaft 32 and the clutch mechanism 50 are provided. The feeding case 21 can be collectively handled as one unit.

Also, as described above, in the seed feeding device 9 of the present embodiment, the feeding roll 28 has a screw feed mechanism 40 that can adjust the amount of seeds fed out. The feeding case 21 includes an adjustment gear 61 fixed to the screw shaft 41 of the screw feeding mechanism 40 and an operation gear support portion 73 that supports an operation gear 62 that can mesh with the adjustment gear 61.

Thus, by supporting the operation gear 62 on the feeding case 21, the distance between the operation gear 62 and the adjustment gear 61 is determined only by the accuracy of the feeding case 21. Thereby, the variation between the centers of the adjustment gear 61 and the operation gear 62 can be suppressed, and the meshing accuracy of the adjustment gear 61 and the operation gear 62 can be improved.

Further, as described above, in the seed feeding device 9 of the present embodiment, the adjustment gear 61 is moved by moving the rotary shaft portion 65 of the operation gear 62 in a direction approaching or separating from the screw shaft 41. The operation gear 62 can be switched between a state where the operation gear 62 is engaged and a state where the operation gear 62 is not engaged.

In this way, the engagement between the operation gear 62 and the adjustment gear 61 can be released by separating the rotation shaft portion 65 of the operation gear 62 from the rotation shaft (screw shaft 41) of the adjustment gear 61. Thus, when the feed amount is not adjusted, the operation gear 62 and the adjustment gear 61 can be separated from each other, so that the operation gear 62 and the adjustment gear 61 can be prevented from being worn or damaged. In addition, if the gear shafts are configured to approach or separate from each other in this way, the gears can be engaged without a chamfer, so that an increase in cost can be prevented.

Further, as described above, the direct seeding device 8 of the present embodiment includes a plurality of feeding cases 21 arranged in one direction, and an adjustment gear 61 and an operation gear 62 corresponding to each of the plurality of feeding cases 21. Is provided. The rotation shaft portions 65 of the operation gears 62 are connected to each other.

In this way, by connecting the rotating shaft portions 65 of the plurality of operation gears 62, the plurality of operation gears 62 can be rotated at the same time. Thereby, the feeding amount of the feeding roll 28 of each feeding case 21 can be adjusted all at once. Further, since the rotation shaft portion 65 of each operation gear 62 is connected, the switching of the presence / absence of engagement with the adjustment gear 61 can be performed simultaneously by the plurality of operation gears 62.

Also, as described above, in the direct seeding device 8 of the present embodiment, the operation gear support portion 73 that supports the rotating shaft portion 65 of the operation gear 62 is fixedly provided on the feeding case 21.

As described above, since the rotation shaft portion 65 of the operation gear 62 is supported by the operation gear support portion 73 fixedly provided on the supply case 21, the operation gear 62 can be accurately positioned with respect to the supply case 21. Thereby, the dispersion | variation between the cores of the said operation gear 62 and the adjustment gear 61 can be suppressed, and the meshing precision of both gears can be improved.

Further, as described above, in the direct seeding device of the present embodiment, the operation gear support portion 73 has a long hole 72 formed therein. The rotating shaft portion 65 is inserted into the long hole 72 and is configured to be movable along the long hole 72.

Thus, by providing the long hole 72 through which the rotation shaft portion 65 of the operation gear 62 is inserted, the movement range of the rotation shaft portion 65 can be regulated. As a result, the operation gear 62 and the adjustment gear 61 can be prevented from approaching more than necessary.

Further, as described above, the direct seeding device 8 of the present embodiment includes the inter-center changing link 75 that can contact the rotating shaft portion 65 of the operation gear 62. Then, the center-to-center change link 75 rotates around the link operation shaft 76 to move the rotation shaft portion 65 in a direction approaching or separating from the screw shaft 41.

According to the above configuration, by operating the link operation shaft 76 to rotate, the operation gear 62 can be moved between the position where the adjustment gear 61 is engaged and the position where the engagement is released.

Further, as described above, in the direct seeding device 8 of the present embodiment, the moving direction (the direction indicated by the arrow A1 in FIG. 11) of the rotating shaft portion 65 when approaching the screw shaft 41 is the screw shaft. It faces the position shifted from the axis center P1 of 41.

Thereby, since the operation gear 62 approaches the adjustment gear 61 from an oblique direction, the gear teeth do not collide from the front. Thereby, while being able to mesh | engage gear teeth reliably, it can prevent that gear teeth collide and are damaged.

Moreover, the spreading work vehicle 1 of the present embodiment includes the seed feeding device 9 and a vehicle body 2 that can travel by mounting the seed feeding device 9.

Since the meshing accuracy of the driven gear 30 and the drive gear 31 is improved, the spreading work vehicle 1 can travel while driving the feeding roll 28 stably. Thereby, it can drive | work, feeding a seed reliably and stably.

Although the first embodiment of the present invention has been described above, the above configuration can be modified as follows, for example.

In the above embodiment, the driven gear support (the left side wall of the feeding case 21) and the drive gear support 49 are integrally formed, but the present invention is not necessarily limited thereto. For example, the drive gear support 49 may be configured as a separate member from the feeding case 21 and the driving gear support 49 may be fixed to the feeding case 21.

In the above embodiment, the feeding roll 28 is a slide roll type that can change the capacity of the feeding hole 28a. However, the present invention is not limited to this, and a feeding roll of a type that cannot change the capacity of the feeding hole 28a can also be adopted.

In the above embodiment, a notch (D cut) is formed at the ends of the drive transmission shaft 32 and the connection shaft 68, and the connection member 69 is fitted into this portion, whereby the drive transmission shaft 32 and the connection shaft 68 are connected. It is set as the structure connected so that relative rotation is impossible. However, the connection structure of the drive transmission shaft 32 and the connection shaft 68 is not limited to this. For example, a keyway may be formed in the end portions of the drive transmission shaft 32 and the connecting shaft 68 instead of the notch, and the connecting member 69 may be fitted in this portion. Further, for example, the drive transmission shaft 32 and the connecting shaft 68 may be connected by spline fitting (in this case, the connecting member 69 can be omitted). In addition, as a configuration for connecting the drive transmission shaft 32 and the connecting shaft 68, a known appropriate connecting structure can be adopted. However, the adjacent drive transmission shafts 32 can be directly connected by, for example, the connecting member 69. In this case, the connecting shaft 68 can be omitted.

In the embodiment described above, the inter-center change link 75 is provided corresponding to each feeding case 21, but the number of inter-core change links 75 is not particularly limited, and one or more inter-core change links. 75 should just be provided.

In the above-described embodiment, the rotation shaft portions 65 of the operation gears 62 are connected by the connection shaft 63, whereby the plurality of operation gears 62 are rotated at the same time. However, the present invention is not limited to this, and the operation gears 62 can be individually rotated.

In the above-described embodiment, the rotation shaft portion 65 and the link operation shaft 76 of the operation gear 62 are configured to be supported by the feeding case 21, but the present invention is not limited thereto, and either the rotation shaft portion 65 or the link operation shaft 76 is used. Or the structure which supports both by the member different from the feeding case 21 may be sufficient.

As described above, the operation gear 62 and the adjustment gear 61 do not need to be engaged except when adjusting the feed amount, but the configuration for changing the center between the adjustment gear 61 and the operation gear 62 is omitted. However, as shown in FIG. 13, the adjustment gear 61 and the operation gear 62 may be configured to always mesh with each other.

In the above-described embodiment, the direct sowing device 8 (granule spraying device) and the seed feeding device 9 are arranged behind the vehicle body 2. However, the arrangement of the granular material spraying device is not necessarily limited thereto, and for example, the granular material spraying device may be disposed in the center of the vehicle body or in front of the vehicle body.

The configuration of the above embodiment is not limited to a seed feeding device and a direct sowing device, and can be widely used in a device for feeding a granular material (for example, granular fertilizer) or a device for spraying.

Next, a second embodiment of the present invention will be described. In the following description of the embodiments and modifications, members that are the same as or similar to the previously described embodiments and the like are denoted by the same reference numerals in the drawings, and description thereof may be omitted. FIG. 14 is a side view of a rice transplanter 1x as a work vehicle according to the second embodiment of the present invention.

As shown in FIG. 14, the rice transplanter 1x includes a vehicle body 2, a planting part 3 disposed behind the vehicle body 2, and a fertilizer applicator (granular material spraying device) 8x.

The spare seedling stands 111 are provided on the left and right of the steering handle 7. A seedling box containing spare mat seedlings can be mounted on the spare seedling stand 111.

The planting part 3 is connected to the rear of the vehicle body 2 via a lifting link mechanism 12. Further, a PTO shaft 13 for outputting the driving force of the engine 10 to the planting unit 3, a lifting cylinder 14 for driving the planting unit 3 up and down, and the like are disposed at the rear part of the vehicle body 2.

The elevating link mechanism 12 has a parallel link structure including a top link 18, a lower link 19, and the like. Further, the elevating cylinder 14 is connected to the lower link 19. By extending and retracting the elevating cylinder 14, the entire planting unit 3 can be moved up and down.

The planting unit 3 includes a seedling stage 17, a plurality of planting units 90, and a plurality of floats 16.

Each planting unit 90 is configured as a rotary planting device provided with two planting claws 92 on a rotating case 91. The rotating case 91 is rotationally driven by the driving force input from the PTO shaft 13 so as to plant seedlings. In addition, the rice transplanter of this embodiment is comprised as a 4-row planting rice transplanter, and is equipped with the planting unit 90 for 4 strips arranged in the left-right direction of the vehicle body.

The seedling stage 17 is disposed above the planting unit 90 and is configured to be able to place a mat seedling. In addition, since the rice transplanter of this embodiment is 4 row planting, the seedling mounting stand 17 is comprised so that the mat seedlings for 4 strips can be mounted side by side in the left-right direction of a vehicle body.

The seedling mounting stand 17 includes a transport mechanism (a well-known vertical feed mechanism and horizontal feed mechanism) that supplies the mat seedlings to the planting units 90. Thereby, since a seedling can be sequentially supplied with respect to each planting unit 90, each planting unit 90 can plant a seedling.

The float (floating) 16 is provided in the lower part of the planting part 3, and is arrange | positioned so that the lower surface can contact the ground.

The fertilizer applicator (granular material spraying device) 8 is a device for spraying solid granular fertilizer (granular material) to the field. The fertilizer applicator 8x includes a fertilizer hopper 27x, a fertilizer feeding device 9x, a transport unit 36, a blower 93, and an air supply pipe 94.

As shown in FIG. 14, the fertilizer hopper 27x is disposed at a position between the driver's seat 6 and the seedling stage 17 in the longitudinal direction of the vehicle body. As shown in FIG. 15, the fertilizer hopper 27 x includes a hopper body 87 and a lid portion 88. The hopper body 87 is configured as a container having an open top, and fertilizer is accommodated in the hopper body 87. The lid portion 88 is disposed so as to cover the open portion at the top of the hopper body 87.

As shown in FIG. 15, the lower portion of the hopper body 87 is a passage portion 89 formed in a funnel shape so as to become thinner as it goes downward. The lower part of the passage part 89 is open. Accordingly, the fertilizer in the hopper body 87 flows downward through the passage portion 89.

Next, the fertilizer feeding device 9x will be described. The fertilizer feeding device 9x is disposed below the fertilizer hopper 27x. The fertilizer feeding device 9x is configured to feed the fertilizer supplied from the fertilizer hopper 27x downward little by little.

The fertilizer feeding device 9x includes a feeding case 21x. The feeding case 21x is configured as a hollow case. The feeding case 21x is configured to be attached to the lower portion of the passage portion 89 of the hopper body 87. As shown in FIG. 19, the feeding case 21x has a fertilizer inflow space 25 therein. The fertilizer inflow space 25 communicates with the passage portion 89. Accordingly, the fertilizer supplied from the fertilizer hopper 27 x flows into the fertilizer inflow space 25.

As shown in FIG. 19, a feeding tray (feeding portion) 28x is disposed in the lower portion of the fertilizer inflow space 25 inside the feeding case 21x. The feeding tray 28x is a member formed in a substantially disc shape. A rotating shaft 45x is fixedly provided at the axis of the feeding tray 28x.

As shown in FIG. 19, a driven-side bevel gear (driven gear) 34 is fixedly provided on the rotating shaft 45x of the feeding tray 28x. Further, the drive shaft 26 is rotatably supported by the feeding case 21x. As shown in FIG. 19, a drive-side bevel gear (drive gear) 35 is fixedly provided on the drive shaft 26. The driving side bevel gear 35 is arranged so as to mesh with the driven side bevel gear 34. A support wall (driven gear support portion) that supports the driven side bevel gear 34 and a support wall (drive gear support portion) that supports the drive side bevel gear 35 are integrally formed in the feeding case 21x.

The driving force output from the electric motor 95 as a driving source is input to the driving shaft 26 (details will be described later). The driving force is transmitted to the rotating shaft 45x via the bevel gears 34 and 35. Thereby, the feeding tray 28x is rotationally driven around the rotation shaft 45x.

Further, the feeding tray 28x is formed with a plurality of feeding holes 28b penetrating the feeding tray 28x in the thickness direction. The feeding hole 28b is formed in a size that can accommodate a predetermined amount (one to several grains) of fertilizer. As a result, the fertilizer in the fertilizer inflow space 25 is taken into the feed hole 28b by a predetermined amount. Thus, the feeding tray 28x is rotationally driven in a state where a predetermined amount of fertilizer is taken into the feeding hole 28b, so that the feeding hole 28b in the state in which the fertilizer is taken moves around the rotation shaft 45x. And when the position of the delivery hole 28b corresponds to a predetermined delivery position, the fertilizer taken in the delivery hole 28b is discharged downward. With the above configuration, the fertilizer in the fertilizer hopper 27x can be fed downward by a predetermined amount (about 1 to several grains).

Subsequently, the air supply pipe 94 and the blower 93 will be described. The air supply pipe 94 is a substantially pipe-shaped member, and is disposed along the left-right direction of the vehicle body as shown in FIG. One end of the air supply pipe 94 (the right end in the present embodiment) is closed, and the blower 93 is connected to the other end (the left end in the present embodiment). Has been. The air supply pipe 94 is fixedly provided so as not to move relative to the vehicle body 2. The blower 93 is configured to send air into the air supply pipe 94.

Subsequently, the transport unit 36 will be described. The transport unit 36 includes an introduction unit 106, a connection path 107, a transport hose 108, and a spray port 109.

The introduction unit 106 is disposed below the feeding case 21x. As shown in FIG. 21 and the like, the upper portion of the introducing portion 106 is open and connected to the lower end portion of the feeding case 21x. Moreover, the introduction part 106 is formed in a funnel shape so that it gradually becomes thinner as it proceeds downward.

The connection path 107 is disposed below the introduction unit 106. As shown in FIG. 19 and the like, the connection path 107 is formed in a circular tube shape, and is disposed substantially along the front-rear direction of the vehicle body 2. A lower end portion of the introduction portion 106 is connected to an intermediate portion in the front-rear direction of the connection path 107. Thereby, the internal space of the connection path 107 communicates with the introduction part 106. Therefore, the fertilizer fed by the fertilizer feeding device 9 x is introduced into the connection path 107 through the introduction unit 106. In the present embodiment, the introduction part 106 and the connection path 107 are integrally formed.

An air supply pipe 94 is connected to the front end of the connection path 107. As a result, the air flow generated by the blower 93 is supplied into the connection path 107 via the air supply pipe 94. The air flow flows backward in the connection path 107. Thereby, the fertilizer introduced in the connection path 107 can be conveyed toward the back on the said airflow. The connection path 107 is fixedly arranged with respect to the vehicle body 2 so as not to move relative to the air supply pipe 94.

A transfer hose 108 is connected to the rear end of the connection path 107. The conveyance hose 108 is a tube-like member having flexibility. A spray port (discharge port) 109 is provided at the end of the transport hose 108 opposite to the connection path 107 (FIG. 14). As shown in FIG. 14, the spray port 109 is provided close to the ground. Therefore, the fertilizer is carried on the air flow generated by the blower 93, is transported through the transport hose 108 to the spray port 109, and is discharged from the spray port 109 toward the ground.

According to the fertilizer applicator 8x configured as described above, the fertilizer in the fertilizer hopper 27x can be fed by a predetermined amount by the fertilizer feeding device 9x and can be transported to the ground by the transport unit 36 and sprayed.

In addition, since the rice transplanter of this embodiment is 4 row planting, the fertilizer applicator 8x of this embodiment can disperse | distribute 4 fertilizers simultaneously, the four fertilizer supply apparatuses 9x, and the four conveyance parts 36. Are arranged side by side in the left-right direction of the vehicle body 2 (see FIG. 15).

Further, the fertilizer hopper 27x of the present embodiment is configured to accommodate two strips of fertilizer. That is, as shown in FIG. 15, the lower part of the hopper main body 87 is divided into two forks to form two passage portions 89. A fertilizer feeding device 9 x is connected to each passage portion 89. Thereby, a fertilizer can be supplied with respect to the two fertilizer supply apparatuses 9x by one fertilizer hopper 27x. Therefore, the fertilizer applicator 8x of this embodiment has two fertilizer hoppers 27x arranged side by side in the left-right direction of the vehicle body so that four fertilizers can be accommodated. Here, the left manure hopper 27x may be referred to as a left hopper 27L, and the right manure hopper 27x may be referred to as a right hopper 27R.

As described above, the fertilizer applicator 8x has the drive shaft 26 for rotationally driving the feeding tray 28x of the fertilizer feeding device 9x. In the present embodiment, the two fertilizer feeding devices 9x are configured to be driven by a single drive shaft 26. Therefore, the fertilizer applicator 8x of the present embodiment has two drive shafts 26. Specifically, as shown in FIG. 15, the fertilizer applicator 8x includes a left drive shaft 26L and a right drive shaft 26R. The left and

right drive shafts

26L and 26R are independent of each other.

As shown in FIG. 15, the left drive shaft 26L is disposed across the two fertilizer feeding devices 9x connected to the left hopper 27L. By inputting a driving force to the left drive shaft 26L, the two fertilizer feeding devices 9x connected to the left hopper 27L can be driven simultaneously.

As shown in FIG. 15, the right drive shaft 26R is disposed across the two fertilizer feeding devices 9x connected to the right hopper 27R. By inputting a driving force to the right drive shaft 26R, the two fertilizer feeding devices 9x connected to the right hopper 27R can be driven simultaneously.

Subsequently, the rotation mechanism of the fertilizer hopper 27x will be described.

That is, the fertilizer applicator 8x of this embodiment is configured to be able to rotate the fertilizer hopper 27x so that the fertilizer in the fertilizer hopper 27x can be discharged to the outside. That is, as shown in FIG. 17, with the lid 88 removed from the hopper body 87, the hopper body 87 is rotated so that the upper open portion faces downward (state of FIG. 17). The fertilizer in the main body 87 can be discharged. Further, since the hopper body 87 can be rotated as described above, maintenance such as cleaning the inside of the hopper body 87 can be easily performed.

A detailed description of the configuration that allows the fertilizer hopper 27x to rotate is as follows. That is, the fertilizer applicator 8x of the present embodiment includes a rotation shaft 78, a rotation stay 85, and a support stay 86. As described above, the fertilizer applicator 8x of the present embodiment has the two fertilizer hoppers 27x (the left hopper 27L and the right hopper 27R) arranged in the left-right direction of the vehicle body. Therefore, in the present embodiment, as shown in FIG. 15, the rotation shaft 78, the rotation stay 85, and the support stay 86 are provided on the left side and the right side of the fertilizer applicator 8x, respectively. In the following description and drawings, the structure on the left side is indicated when “L” is appended to the reference numeral, and the structure on the right side is indicated when “R” is appended after the reference numeral.

The support stay 86 is fixed to the air supply pipe 94. That is, the support stay 86 is fixed to the vehicle body 2. The left support stay 86L is disposed in the vicinity of the left end of the air supply pipe 94. The right support stay 86 R is disposed in the vicinity of the right end of the air supply pipe 94.

A rotation shaft 78 is supported on the support stay 86. The rotation shaft 78 is disposed in parallel with the front-rear direction of the vehicle body. The left rotation shaft 78L is supported by the left support stay 86L, and the right rotation shaft 78R is supported by the right support stay 86R.

As shown in FIG. 15, the rotation stay 85 is disposed substantially along the vertical direction. The lower end of the rotation stay 85 is supported by the support stay 86 via a rotation shaft 78. Thereby, the rotation stay 85 can be rotated around the rotation shaft 78 with respect to the support stay 86. The left rotation stay 85L is supported by the left support stay 86L via the left rotation shaft 78L. The right rotation stay 85R is supported by the right support stay 86R via the right rotation shaft 78R.

The upper end of the rotating stay 85 is fixed to the hopper body 87. Thereby, the fertilizer hopper 27x can be rotated around the rotation shaft 78. Specifically, the upper end of the left rotating stay 85L is fixed to the left side surface of the hopper body 87 of the left hopper 27L. As a result, the left hopper 27L can be rotated around the left rotation shaft 78L in the upper left direction (see the thick arrow A in FIG. 17). Further, the upper end portion of the right rotating stay 85R is fixed to the right side surface of the hopper body 87 of the right hopper 27R. Thereby, the right hopper 27R can be rotated to the upper right around the right rotation shaft 78R (see the thick arrow B in FIG. 17).

In this embodiment, as shown by a two-dot chain line in FIG. 16, the blower 93 can be retracted in a direction away from the left hopper 27L. This is because, as shown in FIG. 15, the blower 93 is arranged on the left side of the left hopper 27L, and therefore interferes with the position of the blower 93 when the left hopper 27L rotates. . Thus, as described above, by allowing the blower 93 to be retracted from the left hopper 27L, the left hopper 27L can be rotated upward without interfering with the blower 93.

As shown in FIG. 16, a handle 98 is provided corresponding to each of the left and right fertilizer hoppers 27x. The handle 98 is fixed to the fertilizer hopper 27x. Therefore, the operator can rotate the fertilizer hopper 27x upward around the rotation shaft 78 by grasping and lifting the handle 98 by hand. In addition, as shown in FIG. 16, the handle 98 of this embodiment is arrange | positioned so that it may protrude toward the front (toward the driver's seat 6 side) from the manure hopper 27x. Thereby, the operator can easily perform the turning operation of the fertilizer hopper 27x from the driver seat 6 side.

In the present embodiment, the fertilizer hopper 27x is configured to rotate integrally with the two fertilizer feeding devices 9x connected to the fertilizer hopper 27x when rotating around the rotation shaft 78. (See FIG. 17). Therefore, when rotating the fertilizer hopper 27x, an operation of separating the fertilizer hopper 27x from the fertilizer feeding device 9x is unnecessary.

In addition, in order to allow the fertilizer hopper 27x and the fertilizer feeding device 9x to rotate integrally around the rotation shaft 78, the fertilizer feeding device 9x needs to be able to be separated from the transport unit 36. Therefore, as shown in FIG. 21, the fertilizer feeding device 9 x is configured to be separated upward from the introduction unit 106 of the transport unit 36.

As described above, since the drive shaft 26 is supported by the feeding case 21x of the fertilizer feeding device 9x, it can be said that the fertilizer hopper 27x rotates integrally with the driving shaft 26. Specifically, the left drive shaft 26L rotates integrally with the left hopper 27L around the left rotation shaft 78L. Further, the right drive shaft 26R rotates integrally with the right hopper 27R around the right rotation shaft 78R.

As described above, in the fertilizer applicator 8x of the present embodiment, the fertilizer hopper 27x, the two fertilizer feeding devices 9x attached to the fertilizer hopper 27x, and the drive shaft disposed across the two fertilizer feeding devices 9x. 26 can rotate integrally around a rotation shaft 78. Here, the fertilizer hopper 27 x, the fertilizer feeding device 9 x, and the drive shaft 26 supply fertilizer to the transport unit 36. Therefore, in the following description, among the configurations included in the fertilizer applicator 8x, the configuration that rotates around the rotation shaft 78 is collectively referred to as a “supply unit”.

More specifically, the left hopper 27L, the two fertilizer feeding devices 9x attached to the left hopper 27L, and the left drive shaft 26L can rotate integrally around the left rotation shaft 78L ( (See thick line arrow A in FIG. 17). Therefore, these are collectively referred to as the “left supply unit”. Further, the right hopper 27R, the two fertilizer feeding devices 9x attached to the right hopper 27R, and the right drive shaft 26R can rotate integrally around the right rotation shaft 78R (the thick line in FIG. 17). (See arrow B). Therefore, these are collectively referred to as the “right supply unit”.

As described above, in the fertilizer applicator 8x of the present embodiment, the left and right supply units can rotate around the rotation shaft 78, respectively. Accordingly, the left and right supply units can move between the work position (FIGS. 15 and 16) and the open position (FIG. 17), respectively.

Here, the “working position” of the supply unit refers to a position when the supply unit is in a state in which fertilizer can be supplied to the transport unit 36. Specifically, each of the two fertilizer feeding devices 9x included in the supply unit is connected to the upper end of the introduction unit 106 of the corresponding transport unit 36 (the state illustrated in FIGS. 15, 18, and 19). Is the “working position” of the supply section. In this state, by inputting a driving force to the drive shaft 26 provided in the supply unit, the feeding trays 28x of the two fertilizer feeding devices 9x provided in the supply unit are respectively driven to rotate, and a predetermined amount of fertilizer for two strips is provided. The fertilizer can be fed out and supplied to the corresponding conveyance unit 36.

Rotating the supply unit at the “working position” upward around the rotation shaft 78 allows the supply unit to be separated from the transport unit 36 (for example, the state shown in FIG. 17). The position of the supply unit in this state is referred to as “open position”. The supply unit in this state cannot supply fertilizer to the conveyance unit 36.

Subsequently, a characteristic configuration of the present embodiment will be described.

As shown in FIG. 15, when the left supply unit is set to the “working position”, the left drive shaft 26L is arranged so as to be substantially parallel to the left-right direction of the vehicle body. The left supply section has a left drive input gear 56L fixedly provided on the left drive shaft 26L. The left drive input gear 56L is disposed in the vicinity of the end portion on the side close to the right supply portion (the right end portion) of the both ends of the left drive shaft 26L. The left drive input gear 56L is a spur gear (spur gear).

Further, as shown in FIG. 15, when the right supply unit is set to the “working position”, the right drive shaft 26R is arranged to be substantially parallel to the left-right direction of the vehicle body. The right supply unit has a right drive input gear 56R fixedly provided on the right drive shaft 26R. The right drive input gear 56R is disposed in the vicinity of the end portion on the side close to the left supply portion (the left end portion) of both ends of the right drive shaft 26R. The right drive input gear 56R is a spur gear (spur gear).

As shown in FIGS. 15 and 16, when both the left and right supply units are set to the “working position”, the left and right drive shafts 26 L so that the axis lines of the left drive shaft 26 L and the right drive shaft 26 R coincide with each other. , 26R are arranged. At this time, the left and right drive input gears 56L and 56R are arranged adjacent to each other in the axial direction.

The vehicle body 2 is provided with an electric motor 95 as a drive source of the fertilizer applicator 8x as shown in FIG. The electric motor 95 is fixedly disposed so as not to move relative to the vehicle body 2. The output shaft of the electric motor 95 is provided so as to be substantially parallel to the left-right direction of the vehicle body 2. A drive output gear 51 is fixedly provided on the output shaft. The drive output gear 51 is a spur gear (spur gear).

15 and 16, the left drive input gear 56L is arranged so as to mesh with the drive output gear 51 when the left supply unit is set to the “working position”. By driving the electric motor 95 in this state, the rotational driving force is transmitted to the left drive shaft 26L via the drive output gear 51 and the left drive input gear 56L. Thereby, the two fertilizer supply apparatuses 9x with which the left supply part is equipped can be driven.

As shown in FIGS. 15 and 16, the right drive input gear 56 R is arranged to mesh with the drive output gear 51 when the right supply unit is set to the “working position”. By driving the electric motor 95 in this state, the rotational driving force is transmitted to the right drive shaft 26R via the drive output gear 51 and the right drive input gear 56R. Thereby, the two fertilizer supply apparatuses 9x with which the right supply part is equipped can be driven.

15 and FIG. 16, the left and right drive input gears 56L and 56R are arranged so as to be able to mesh with one drive output gear 51 at the same time. With the above configuration, the driving force can be transmitted from the single drive output gear 51 to the left and

right drive shafts

26L and 26R.

In the above-mentioned Patent Document 3, since the driving force is input only to the right driving shaft (first input shaft), the driving force is transmitted to the left driving shaft (second input shaft). Therefore, a connection mechanism that connects the left and right drive shafts is necessary. In this regard, in the present embodiment, the driving force is transmitted from the single drive output gear 51 to the left and

right drive shafts

26L and 26R, so that the right drive shaft 26R is driven to the left drive shaft 26L. There is no need to transmit power. Therefore, the fertilizer applicator 8x of this embodiment does not have a connection mechanism that connects the left and

right drive shafts

26L, 26R. Thereby, the fertilizer applicator 8x can be comprised simply.

As shown in FIG. 18, the axial center of the drive input gear 56 (right drive input gear 56 R in the case of FIG. 18) (right drive shaft 26 R in FIG. 18) is more than the axial center of the drive output gear 51. It is placed at a high position. In other words, the drive input gear 56 (the right drive input gear 56R in the case of FIG. 18) is arranged to mesh with the drive output gear 51 from above.

Accordingly, as shown in FIG. 20, the drive input gear 56 (the right drive input gear 56R in the case of FIG. 20) moves upward to release the engagement with the drive output gear 51, and It is possible to move away from the drive output gear 51 (see the bold arrow in FIG. 20). On the contrary, the drive input gear 56 can be meshed with the drive output gear 51 by approaching the drive output gear 51 from above.

Accordingly, as shown in FIG. 17, the left drive input gear 56 L is separated upward from the drive output gear 51 by moving the left supply unit from the “work position” to the “open position”. (See the thick arrow A in FIG. 17). As a result, the connection between the output shaft of the electric motor 95 and the left drive shaft 26L is released. Conversely, the left drive input gear 56L and the drive output gear 51 can be engaged with each other by moving the left supply section from the “open position” to the “work position” (state of FIG. 15). . As a result, the output shaft of the electric motor 95 and the left drive shaft 26L are connected.

As described above, according to the configuration of the present embodiment, the left supply unit is moved around the left rotation shaft 78L, thereby connecting the output shaft of the electric motor 95 and the left drive shaft 26L. Or it can be cut. The connection and disconnection are realized by the left drive input gear 56L and the drive output gear 51 being separated or approached. Therefore, a clutch or the like for realizing the connection and disconnection is unnecessary. Therefore, in the present embodiment, no clutch is provided between the output shaft of the electric motor 95 and the left drive shaft 26L.

Similarly, by moving the right supply unit from the “work position” to the “open position”, the right drive input gear 56R can be separated upward from the drive output gear 51 (FIG. 17). (See bold arrow B). As a result, the connection between the output shaft of the electric motor 95 and the right drive shaft 26R is released. Conversely, the right drive input gear 56R and the drive output gear 51 can be engaged with each other by moving the right supply section from the “open position” to the “work position” (state of FIG. 15). . As a result, the output shaft of the electric motor 95 and the right drive shaft 26R are connected.

As described above, according to the configuration of the present embodiment, the right supply unit is moved around the right rotation shaft 78R, thereby connecting the output shaft of the electric motor 95 and the right drive shaft 26R. Or it can be cut. The connection and disconnection are realized by separating or approaching the right drive input gear 56R and the drive output gear 51. Therefore, a clutch or the like for realizing the connection and disconnection is unnecessary. Therefore, in this embodiment, no clutch is provided between the output shaft of the electric motor 95 and the right drive shaft 26R.

In addition, in the above-mentioned patent document 3, when rotating a supply part (upper fertilizer machine), the operation which cut | disconnects a clutch and a connection mechanism was required. For this reason, when forgetting the operation which cuts | disconnects a clutch or a connection mechanism when rotating a supply part, there existed a possibility of damaging the said clutch or a connection mechanism.

In this respect, since the fertilizer applicator 8x of the present embodiment does not have the clutch and the coupling mechanism as described above, there is no problem that the clutch and the coupling mechanism are damaged. In addition, since it is not necessary to operate the clutch or the coupling mechanism when the supply unit is moved around the rotation shaft 78, the supply unit can be moved around the rotation shaft 78 with a simple operation.

By the way, the clutch of patent document 3 controls connection / disconnection between an engine and a supply part (upper fertilizer). In the configuration of Patent Document 3, if the clutch is omitted, the supply unit cannot be disconnected from the engine, and the supply unit cannot be stopped. Therefore, in the configuration of Patent Document 3, the clutch is an essential configuration in order to separate and stop the supply unit from the engine.

In contrast, in the rice transplanter 1x of the present embodiment, an electric motor 95 is provided as a dedicated drive source for driving the supply unit. Since the electric motor 95 can be controlled independently of the engine 10, the electric motor 95 may be stopped to stop the supply unit. Thus, in the fertilizer applicator 8x of this embodiment, since the electric motor 95 is provided as a drive source dedicated to the supply unit, a clutch for separating and stopping the supply unit from the engine is unnecessary. As a result, the clutch can be omitted as described above.

In the rice transplanter 1x of this embodiment, if the drive source of the supply unit is the engine 10, it is necessary to provide a drive transmission mechanism for transmitting drive from the engine 10 to the drive output gear 51. For this reason, it is difficult to dispose the drive output gear 51 at the center in the left-right direction of the vehicle body due to layout restrictions of the drive transmission mechanism. As a result, it is difficult to dispose the drive output gear 51 at a position where the left and right drive input gears 56L and 56R can mesh with each other.

In this respect, since the electric motor 95 can be arranged on the vehicle body relatively freely, there is no particular difficulty in arranging the drive output gear 51 at the center in the left-right direction of the vehicle body 2. In the present embodiment, as shown in FIGS. 15 and 16, the drive output gear 51 is disposed at the center in the left-right direction of the vehicle body 2, and therefore, the left and right drive input gears 56 L with respect to the drive output gear 51. 56R can mesh with each other.

Patent Document 3 describes an operation member for performing an operation for releasing the above-described coupling mechanism. In Patent Document 3, the operation member is disposed in the vicinity of the handle (second gripping portion). Therefore, the operator can release the connection of the connection mechanism by holding the operation member together with the handle (second holding portion). Here, since the operation member needs to be disposed in the vicinity of the coupling mechanism, the handle (second grip portion) needs to be disposed in the vicinity of the coupling mechanism. As described above, in the configuration of Patent Document 3, the position of the handle is restricted.

In this respect, since the fertilizer applicator 8x of the present embodiment does not have the clutch and the coupling mechanism as described above, an operation member for operating the clutch or the coupling mechanism is not necessary. Therefore, there is no restriction that the handle 98 must be disposed in the vicinity of the operation member. Thus, according to the configuration of the present embodiment, the handle 98 can be freely arranged. Therefore, the handle 98 can be arranged at a position where the operator can easily grip it, so that the operation of moving the supply unit by gripping the handle 98 can be easily performed.

Subsequently, maintenance of the transport unit 36 will be described.

As described above, in the fertilizer applicator 8x of the present embodiment, the supply unit can be separated from the introduction unit 106 of the transport unit 36 by rotating the supply unit upward. Thereby, as shown in FIG. 21, the internal space of the introducing | transducing part 106 can be exposed. Therefore, according to said structure, the effect that the inside of the introducing | transducing part 106 etc. can be performed easily is also acquired.

However, even if the supply unit is rotated upward as described above, the inside of the connection path 107 is hardly exposed as shown in FIG. Therefore, it is difficult to clean the inside of the connection path 107. Therefore, in this embodiment, the cleaning member 101 is provided inside the connection path 107 so that the inside of the connection path 107 can be easily cleaned.

The cleaning member 101 only needs to clean at least a portion through which the fertilizer passes in the longitudinal direction of the connection path 107. Therefore, as shown in FIG. 19 and the like, the cleaning member 101 of the present embodiment is connected to a downstream side (rear side) end of the connection path 107 from a location where the introduction part 106 is connected in the connection path 107. It is provided in the area between. The cleaning member 101 is configured to be rotatable around the axis of the connection path 107 inside the connection path 107. As described above, by rotating the cleaning member 101 in the connection path 107, the deposits deposited on the inner peripheral wall surface of the connection path 107 can be scraped off. Thereby, clogging of fertilizer etc. can be prevented.

Incidentally, the cleaning member 101 may be composed of a brush, for example. However, if a brush or the like is disposed in the connection path 107, it will be an obstacle when the fertilizer passes through the connection path 107.

Therefore, in this embodiment, the cleaning member 101 is composed of a wire (wire). More specifically, the cleaning member 101 of the present embodiment is configured in a coil shape (a vine winding shape) having a diameter corresponding to the inner diameter of the connection path 107 by appropriately bending the wire.

Thus, since the cleaning member 101 is composed of a wire rod, the space occupied by the cleaning member 101 in the connection path 107 is very small. Thereby, the bad influence which it has on the conveyance of the fertilizer in the connection path 107 can be suppressed to the minimum. In particular, in this embodiment, since the cleaning member 101 is coiled, the fertilizer can pass through the axial center. Thereby, conveyance of the fertilizer in the connection path 107 is not prevented by the cleaning member 101.

As shown in FIG. 19, in this embodiment, an extending portion 102 extending from the cleaning member 101 toward the front is provided. The extending portion 102 is a wire rod (wire) disposed so as to coincide with the axis of the connection path 107 and is formed integrally with the cleaning member 101. As shown in FIG. 19, the extending portion 102 is disposed so as to protrude from the front end portion of the connection path 107 and further pass through the inside of the air supply pipe 94. A passage hole is formed in the peripheral wall of the air supply pipe 94 so that the extending portion 102 can be passed back and forth. Thereby, the extending | stretching part 102 is arrange | positioned so that it may protrude toward the front from the air supply pipe | tube 94. FIG.

And the operation part 103 is provided in the edge part of the front side of the extending | stretching part 102. FIG. The operation unit 103 is fixed to the extending unit 102 and is configured in a lever shape so that the operator can operate it with a finger. The operator can rotate the operation unit 103 around the longitudinal direction of the extending unit 102. Thus, the operator can rotate the cleaning member 101 inside the connection path 107 around the axis of the connection path 107. Thereby, the inside of the connection path 107 can be cleaned.

As described above, the operation unit 103 is provided in front of the air supply pipe 94. That is, the operation unit 103 is disposed on the driver seat 6 side. Therefore, the operator can operate the operation unit 103 from the driver seat 6 side. Thereby, since operation of the operation part 103 can be performed easily, the cleaning in the connection path 107 by the cleaning member 101 can be performed easily.

As described above, the fertilizer applicator 8x of this embodiment includes the fertilizer feeding device 9x, the hopper 20, the drive output gear 51, and the transport unit 36. The drive output gear 51 is rotationally driven by a driving force from an electric motor 95 that is a driving source. The conveyance unit 36 conveys the fertilizer fed from the fertilizer feeding device 9x to the ground. The supply part which supplies a fertilizer is comprised including the hopper 20 and the fertilizer supply apparatus 9x. The supply unit includes a feeding tray 28 x and a drive input gear 56. A driving force for driving the feeding tray 28x is input to the drive input gear 56. The supply unit is configured to be movable between a work position (FIG. 15) where fertilizer can be supplied to the transport unit 36 and an open position (FIG. 17) separated from the transport unit 36. When the supply unit is in the working position, the drive output gear 51 and the drive input gear 56 are engaged with each other. Further, the drive input gear 56 is separated from the drive output gear 51 by moving the supply unit from the work position toward the open position.

As described above, the transmission of the drive from the electric motor 95 as the drive source to the fertilizer feeding device 9x is realized by the meshing of the gears, and the gears are separated when the supply unit is moved to the open position. . Thereby, when moving a supply part to an open position, the operation of the clutch for canceling the connection between the supply part and the electric motor 95 becomes unnecessary. Further, since the clutch becomes unnecessary, there is no possibility that the clutch is forgotten to be broken and damaged.

Moreover, as demonstrated above, the fertilizer applicator 8x of this embodiment is provided with two supply parts on the left and right. The drive input gear 56 included in each supply unit can mesh with the drive output gear 51.

Since each of the two supply units is provided with the drive input gear 56 for receiving the drive force from the drive output gear 51, the drive force can be transmitted from one drive output gear 51 to each supply unit. Therefore, a connection mechanism for transmitting driving force between the plurality of supply units is not necessary. In addition, the operation of releasing the connection mechanism is not required, and there is no possibility that the connection mechanism is forgotten to be broken and damaged.

Also, as described above, in the fertilizer applicator 8x of the present embodiment, the drive source of the drive output gear 51 is the electric motor 95.

For example, it is conceivable to drive the fertilizer applicator 8x with the driving force of the engine. In this case, however, it is necessary to provide a driving force transmission mechanism from the engine to the driving output gear 51. The degree of freedom is reduced. In this regard, by using the electric motor 95 as the drive source of the fertilizer applicator 8x as described above, the drive source can be freely arranged as compared with the engine, so that the degree of freedom of arrangement of the drive output gear 51 is increased.

Further, as described above, the fertilizer applicator 8x of the present embodiment is configured as follows. That is, the conveyance unit 36 includes a substantially funnel-shaped introduction unit 106, a connection path 107 configured in a substantially tubular shape, a conveyance hose 108, and a cleaning member 101. Fertilizer from the supply unit is supplied to the introduction unit 106. The connection path 107 is connected to the lower end part of the introduction part 106. The conveyance hose 108 is connected to the connection path 107 and conveys the fertilizer to the ground. The cleaning member 101 is configured to be rotatable around the axis of the connection path 107 inside the connection path 107.

As described above, by providing the cleaning member 101, the inside of the connection path 107 can be cleaned, so that deposits can be prevented from accumulating in the connection path 107.

Further, as described above, in the fertilizer applicator 8x of the present embodiment, the cleaning member 101 is made of a wire.

Thus, since the cleaning member 101 is made of a wire, the space occupied by the cleaning member 101 in the connection path 107 is very small. Therefore, when the fertilizer is conveyed in the connection path 107, the cleaning member 101 does not get in the way.

Next, a modification of the above embodiment will be described with reference to FIG.

22A is configured such that the cleaning member 101 can be reciprocated along the axial direction of the connection path 107. In the modification shown in FIG. Thus, the inside of the connection path 107 can be cleaned by reciprocating the cleaning member 101 in the connection path 107.

22 (a), the operation unit 103 is configured to be slidable along the axial direction (front-rear direction) of the connection path 107. Therefore, the operator can reciprocate the cleaning member 101 in the connection path 107 along the axis of the connection path 107 by moving the operation unit 103 back and forth. 22A, an urging member 104 configured as a compression coil spring is disposed between the operation unit 103 and the air supply pipe 94. Thereby, the operation part 103 is urged | biased toward the front (left side of FIG. 22). Therefore, the operator can reciprocate the cleaning member 101 inside the connection path 107 by pushing the operation unit 103 backward (right side in FIG. 22) and then releasing the push.

In the modification shown in FIG. 22B, the connection path 107 is automatically rotated by the wind generated by the blower 93. Specifically, as shown in FIG. 22 (b), a wind receiving portion 105 is provided in the extending portion 102. The wind receiving portion 105 is disposed inside the air supply pipe 94. The wind receiving portion 105 has a shape capable of receiving air flowing in the air supply pipe 94 and is fixed to the extending portion 102. Since the air flow generated by the blower 93 is supplied to the air supply pipe 94, the air flow acts on the wind receiving portion 105, and the extending portion 102 can be rotated around the axis.

According to this, the cleaning member 101 can be rotated in the connection path 107 by the action of the air flow generated by the blower 93. The cleaning member 101 continues to rotate while the blower 93 supplies airflow. That is, since the cleaning by the cleaning member 101 can be performed automatically and continuously, the inside of the connection path 107 can always be kept clean and deposits can be reliably prevented from accumulating in the connection path 107. In the modification of FIG. 22B, since the wind of the blower 93 is used to rotate the cleaning member 101, it is not necessary to separately provide a drive source for rotating the cleaning member 101, and fertilization is performed. The machine 8x can be configured simply.

Although the second embodiment and the modified examples have been described above, the above configuration can be changed as follows, for example.

In the above-described embodiment, the fertilizer feeding device 9x is provided with a plurality of feeding holes 28b penetrating in the thickness direction in the disc-shaped feeding tray 28x, and the feeding tray 28x is arranged around the rotation axis 45x disposed in a substantially vertical direction. It is the structure which is rotationally driven by. However, the configuration of the fertilizer feeding device 9x is not limited to this, and any configuration can be used as long as the fertilizer can be fed out by a predetermined amount. For example, the fertilizer feeding device 9x may have a configuration in which a plurality of feeding holes are provided around a cylindrical feeding roll, and the feeding roll is rotationally driven around a rotation axis arranged in a substantially horizontal direction.

In the above embodiment, when the left and right supply units are in the “working state” (FIGS. 15 and 16), the left and right drive input gears 56L and 56R are arranged adjacent to each other in the axial direction. Not limited to this. In short, it is only necessary that the left and right drive input gears 56L and 56R can simultaneously mesh with one drive output gear 51, and the axes of the left and right drive input gears 56L and 56R do not necessarily have to coincide. .

The fertilizer applicator 8x of the above embodiment is configured to spray four pieces of fertilizer, and the left and right supply units are configured to supply two pieces of fertilizer, respectively, but are not limited thereto. For example, as a fertilizer applicator 8x for spraying 6 pieces of fertilizer, the left and right supply units can supply 3 pieces of fertilizer. However, it is not necessary for the supply parts on the left and right to supply the same number of fertilizers. For example, in the fertilizer applicator 8x for spraying 6 pieces of fertilizer, the left supply unit can supply 4 pieces of fertilizer and the right supply unit can supply 2 pieces of fertilizer. .

The configuration of the present invention is not limited to a fertilizer applicator, and can be widely applied to a granular material spraying device that sprays granular material (a granular solid material) to the ground.

Next, a third embodiment of the present invention will be described. FIG. 23 is a side view of a rice transplanter 1x according to a third embodiment of the present invention. As shown in FIG. 23, the rice transplanter 1x includes a vehicle body 2 and a planting unit 3 disposed behind the vehicle body 2.

The rice transplanter 1x of this embodiment is configured as a four-row planting rice transplanter, as shown in FIG. 24, and has four rows of planting units 90 arranged in the left-right direction of the vehicle body. ing.

The seedling mounting table 17 has a mounting surface 17b on which a mat seedling can be mounted. The placement surface 17b faces obliquely rearward and upward. Further, the upper end 17a of the seedling stage 17 is directed obliquely forward and upward.

Further, the body 2 is provided with a fertilizer applicator 8x for spraying fertilizer on the field. The fertilizer applicator 8x includes a fertilizer hopper 27x for storing solid granular fertilizer, a fertilizer feeding device 9x for feeding the fertilizer in the fertilizer hopper 27x by a predetermined amount, a transport hose 108 for transporting the fed fertilizer to the ground, It has mainly.

As shown in FIGS. 23 and 24, the fertilizer hopper 27x is disposed at a position between the driver seat 6 and the seedling stage 17 in the front-rear direction of the vehicle body. As shown in FIG. 25, the fertilizer hopper 27 x includes a hopper body 87 and a lid portion 88. The hopper body 87 is configured as a container having an open top, and fertilizer is accommodated in the hopper body 87.

The lid portion 88 is disposed so as to cover the open portion at the top of the hopper body 87. Note that a cautionary note seal (not shown) describing, for example, a method for adjusting the fertilizer application amount by the fertilizer applicator 8x is affixed to the upper surface of the lid portion 88 and the central portion 88a in the longitudinal direction of the vehicle body.

As shown in FIG. 25, the lid portion 88 is connected to the hopper body 87 via the hinge portion 115. The lid part 88 is rotatable around the hinge part 115. The hinge portion 115 is provided on the rear wall surface of the hopper body 87. By rotating the lid portion 88 around the hinge portion 115 toward the rear side, the open portion of the hopper body 87 can be opened (state shown in FIG. 27).

As shown in FIG. 25, the lower portion of the hopper body 87 is a passage portion 89 formed in a funnel shape so as to become thinner as it goes downward. And the lower end part of the said channel | path part 89 is connected to the upper part of the fertilizer supply apparatus 9x. In the present embodiment, two fertilizers are accommodated in one fertilizer hopper 27x. As shown in FIG. 26, the lower part of the hopper body 87 is divided into two forks to form two passage parts 89. A fertilizer feeding device 9 x is connected to each passage portion 89. Thereby, a fertilizer can be supplied with respect to the two fertilizer supply apparatuses 9x by one fertilizer hopper 27x. In addition, since the rice transplanter of this embodiment is 4 row planting, the fertilizer applicator 8x is provided with the four fertilizer supply apparatuses 9x so that the fertilizer for 4 rows can be sprayed. Therefore, as shown in FIG. 26, the fertilizer applicator 8x of the present embodiment includes two fertilizer hoppers 27x arranged in the left-right direction of the vehicle body.

The fertilizer feeding device 9x is configured to feed the fertilizer supplied from the fertilizer hopper 27x through the passage portion 89 little by little to the transport hose 108. The transport hose 108 is a tube-like member having flexibility, and a spray port 109 is formed at the tip thereof. As shown in FIG. 23, the spray port 109 is provided close to the ground.

With the above configuration, the fertilizer in the fertilizer hopper 27x is fed out by a predetermined amount by the fertilizer feeding device 9x, and then transported to the spraying port 109 by the transport hose 108 and released to the ground.

By the way, in general, fertilizers are supplied to the market in the state of fertilizer bags. Therefore, conventionally, when fertilizer is put into the fertilizer hopper 27x, it has been performed as follows. That is, first, the operator opens a hole in the fertilizer bag containing the fertilizer. Subsequently, the operator lifts the fertilizer bag in a state where the hole is opened to a position higher than the opening of the fertilizer hopper 27x. Then, the operator tilts the fertilizer bag and inputs the fertilizer into the fertilizer hopper 27x through the aforementioned hole. However, since the fertilizer bag is heavy, the work of supplying the fertilizer to the fertilizer hopper 27x is a heavy labor and a heavy burden on the operator. Moreover, since the said fertilizer bag had to be lifted in the state which opened the fertilizer bag, the fertilizer might spill.

Therefore, in the present embodiment, as shown in FIG. 27, a fertilizer bag base 116 arranged substantially horizontally is provided inside the hopper body 87. The fertilizer bag base 116 is configured in a lattice shape so that solid granular fertilizer can pass vertically. According to this configuration, when supplying fertilizer to the fertilizer hopper 27x, the operator can place the fertilizer bag 117 on the fertilizer bag base 116 (state of FIG. 27). This eliminates the need for the operator to support the fertilizer bag 117 when the fertilizer in the fertilizer bag 117 is put into the hopper body 87. Therefore, the burden on the operator in the work of supplying fertilizer can be reduced.

Furthermore, the fertilizer hopper 27x of the present embodiment is provided with a punching means for making a hole in the fertilizer bag 117 placed on the fertilizer bag base 116. In the present embodiment, the hole punching means is a slit 118 provided on the wall surface of the hopper body 87. The slit 118 is formed to face the vicinity of the lower part of the fertilizer bag placed on the fertilizer bag base 116. Then, by inserting a knife 110 or the like from the outside of the hopper through the slit 118 (FIG. 28), a hole can be made in the fertilizer bag 117 placed on the fertilizer bag base 116. In this way, if the fertilizer bag 117 is placed inside the fertilizer hopper 27x (the state where the fertilizer bag is placed on the fertilizer bag base 116), the fertilizer bag 117 can be prevented from spilling if the hole is opened. .

In the fertilizer hopper 27x of the present embodiment, the slit 118 is formed in a rubber seal member 119. When the knife 110 or the like is not inserted into the slit 118, the slit 118 is closed by the elasticity of rubber. Thereby, it is possible to prevent the fertilizer in the fertilizer hopper 27x from leaking out through the slit 118.

Then, the rain avoidance part 145 with which the fertilizer hopper 27x of this embodiment is provided is demonstrated.

When supplying fertilizer into the fertilizer hopper 27x, it is necessary to open the lid 88 (open the opening at the top of the hopper main body 87). For this reason, if fertilizer is supplied during rainy weather, rainwater may enter the fertilizer hopper 27x. If rainwater has entered the fertilizer hopper 27x, the fertilizer in the fertilizer hopper 27x melts and hardens, and the fertilizer cannot be sprayed.

Therefore, the fertilizer hopper 27x of this embodiment includes a rain avoiding portion 145. The rain avoiding portion 145 is a substantially flat plate-like member having a certain degree of rigidity, and is made of a material (such as synthetic resin) that does not allow rain water to pass through. As shown in FIG. 25, the rain avoiding portion 145 is connected to the end portion of the lid portion 88 opposite to the hinge portion 115.

As shown in FIG. 25, the rain avoiding portion 145 is connected to the lid portion 88 at a substantially right angle when viewed in the left-right direction of the vehicle body. Therefore, in the state where the lid portion 88 is opened (the state where the lid portion 88 is substantially upright, the state shown in FIG. 27), the rain avoiding portion 145 is substantially horizontal and protrudes forward. Thereby, when the cover part 88 is opened, the rain avoiding part 145 is arranged to face the opening part of the hopper body 87.

By providing the rain avoiding portion 145 as described above, the rain avoiding portion 145 covers the upper portion of the opening of the hopper body 87 when the lid 88 is opened (the state shown in FIG. 27). Accordingly, even if the lid 88 is opened during rainy weather, the rainwater can be received by the rain avoiding portion 145, so that the rainwater can be prevented from pouring into the hopper body 87. Therefore, the fertilizer can be supplied to the fertilizer hopper 27x even in rainy weather.

On the other hand, in a state in which the lid portion 88 is closed, the rain avoiding portion 145 is in a state along the front surface of the hopper body 87 (state in FIG. 25). Therefore, if the cover part 88 is closed, the rain avoiding part 145 does not get in the way.

In addition, when it is not raining, when supplying fertilizer to the fertilizer hopper 27x, the rain avoiding portion 145 may get in the way. Therefore, it is preferable that the rain avoiding portion 145 can be removed or retracted. As shown in FIG. 27, the rain avoiding portion 145 of this embodiment is connected to the lid portion 88 via a hinge portion 147. Then, the rain avoiding portion 145 can be tilted backward by rotating the rain avoiding portion 145 around the hinge portion 147 with the lid portion 88 opened (see FIG. 28). Status). As described above, when it is not raining, the rain avoiding portion 145 can be retracted so as not to disturb the supply of fertilizer.

In this embodiment, a seal member 148 that covers the gap between the lid 88 and the rain avoiding portion 145 is provided. The seal member 148 is, for example, a flexible vinyl sheet member, and straddles the end portion on the hinge portion 147 side of the rain avoiding portion 145 and the end portion on the hinge portion 147 side of the lid portion 88. Are arranged as follows. Since the seal member 148 is provided in this way, rainwater can be prevented from entering through the gap between the lid portion 88 and the rain avoiding portion 145.

Subsequently, the seedling supply auxiliary unit 121 included in the rice transplanter of the present embodiment will be described.

When the mat seedlings placed on the seedling table 17 are reduced, the operator places the spare mat seedlings stored in the seedling box (not shown) mounted on the preliminary seedling table 111 on the seedling table 17. Supply. At this time, the operator needs to scoop up the spare mat seedling in the seedling box with the seedling collecting plate and carry it to the seedling placing stand 17. However, since the seedling collecting plate on which the mat seedling is placed is relatively heavy, the operation of carrying the seedling collecting plate to the seedling placing stand 17 is heavy for the operator.

Therefore, the rice transplanter 1x according to the present embodiment temporarily places a seedling plate (temporary) at a position between the driver's seat 6 and the seedling platform 17 in the front-rear direction of the vehicle body 2 as shown in FIG. It is provided with a possible seedling supply auxiliary unit 121.

By providing the seedling supply assist unit 121 in this way, the operator temporarily moves the seedling plate between the driver seat 6 and the seedling table 17 while the seedling plate is being transported to the seedling table 17. I can put it. Thereby, since the operator can take a rest in the middle of the operation | work which carries a seedling board, it can reduce an operator's burden.

Next, a more specific explanation will be given. In the present embodiment, the seedling supply auxiliary unit 121 is configured by a lid portion 88 of the fertilizer hopper 27x and a protruding portion 122 (described later). And the seedling supply auxiliary | assistant part 121 of this embodiment is comprised so that the seedling collection board 99 which mounted the mat seedling 112 on the upper surface of the cover part 88 of the fertilizer hopper 27x can be mounted, as shown in FIG. .

As described above, the fertilizer hopper 27x is located between the driver seat 6 and the seedling stage 17. Therefore, by making it possible to place the seedling plate 99 on the fertilizer hopper 27x as described above, the seedling plate 99 can be temporarily placed between the driver seat 6 and the seedling table 17.

Thus, since the seedling supply assisting part 121 of the present embodiment is configured to place the seedling collecting plate 99 on the upper surface of the lid part 88 of the fertilizer hopper 27x, a stand for temporarily placing the seedling collecting plate 99 is provided. There is no need to provide a separate one. Thereby, the seedling supply auxiliary | assistance part 121 can be comprised simply, and it can prevent that the manufacturing cost of the rice transplanter 1x rises.

In the conventional rice transplanter, it was not impossible to place the seedling plate 99 on the lid 88 of the fertilizer hopper 27x. However, as shown in FIG. 27, the upper surface of the lid portion 88 of the fertilizer hopper 27x is not necessarily a flat surface but is curved. For this reason, it cannot be said that the upper surface of the lid portion 88 of the fertilizer hopper 27x is suitable as a place where the seedling collection plate 99 is placed.

Therefore, in the conventional rice transplanter, even if the seedling plate 99 is placed on the cover portion 88 of the fertilizer hopper 27x, it is unstable and the seedling plate 99 may fall. Further, as described above, a cautionary note seal (not shown) is attached to the central portion 88a of the upper surface of the lid portion 88 of the fertilizer hopper 27x. For this reason, if the seedling plate 99 is directly placed on the upper surface of the lid portion 88, there is a problem in that the caution note seal is rubbed or peeled off and the caution note cannot be read.

Therefore, the seedling supply assisting part 121 of the present embodiment has a protruding part 122 that protrudes upward at the upper part of the fertilizer hopper 27x. As shown in FIG. 25, the upper end of the protrusion 122 is formed to protrude above the upper surface of the lid 88 of the fertilizer hopper 27x. Further, as shown in FIG. 27 and the like, in the present embodiment, the protruding portion 122 is integrally formed on the upper surface of the lid portion 88.

Moreover, the protrusion part 122 is formed in the back position in the front-back direction of the fertilizer hopper 27x. As shown in FIG. 25, when viewed in the left-right direction of the vehicle body, the tip (upper end) of the protrusion 122 has a rounded shape. Further, as shown in FIG. 25, when viewed in the left-right direction of the vehicle body, a common tangent line 123 between the upper surface of the projecting portion 122 and the upper surface of the lid portion 88 is in the front-rear direction of the upper surface of the lid portion 88. It is configured not to interfere with the central portion 88a.

Further, as shown in FIGS. 24 and 26, the projecting portion 122 is formed elongated along the left-right direction of the vehicle body. Further, as shown in FIG. 26, the projecting portion 122 is formed over substantially the entire width of the lid 88 in the left-right direction of the vehicle body.

As described above, since the protruding portion 122 is provided on the upper surface of the lid portion 88 of the fertilizer hopper 27x, when the seedling plate 99 is placed on the lid portion 88, the upper surface of the lid portion 88 and the protruding portion The upper surface of 122 is in contact with the lower surface of the seedling plate 99 (FIG. 29). As a result, the seedling plate 99 can be supported from below by the upper surface of the lid 88 and the upper surface of the protrusion 122. Therefore, it can be said that the cover part 88 and the protrusion part 122 are support parts.

As shown in FIG. 29, the upper surface of the lid portion 88 of the present embodiment is curved so as to be convex upward when viewed from the left-right direction of the vehicle body. Therefore, the upper surface of the cover 88 and the lower surface of the seedling plate 99 can be contacted at only one place in the front-rear direction of the vehicle body. For this reason, if there is no protrusion 122, the seedling plate 99 placed on the upper surface of the lid 88 is supported only at one place in the front-rear direction, so it becomes very unstable and falls off the lid 88. There is a risk that.

In this respect, in the seedling supply auxiliary part 121 of the present embodiment, since the protruding part 122 protruding from the upper surface of the lid part 88 is provided as described above, the seedling collecting plate 99 is connected to the upper surface of the lid part 88 and the protruding part. The upper surface of 122 can be supported at two places in the front-rear direction. More specifically, the front side of the seedling plate 99 is supported by the upper surface of the lid portion 88, and the rear side of the seedling plate 99 is supported by the upper surface of the protruding portion 122. Thus, since the seedling plate 99 can be stably supported at two places in the front-rear direction, the seedling plate 99 can be prevented from falling from the lid portion 88.

Further, as described above, in the seedling supply assisting portion 121 of the present embodiment, since the tangent line 123 described above does not interfere with the central portion 88a of the lid portion 88, the seedling collection plate 99 is placed on the lid portion 88. 29, the lower surface of the seedling collection plate 99 is in a state of being lifted from the central portion 88a of the lid portion 88, as shown in FIG. Thereby, since the seedling plate 99 does not contact the caution sticker (not shown) attached to the central portion 88a on the upper surface of the lid portion 88, it is possible to prevent the caution sticker from being rubbed or peeled off.

Subsequently, an operation of supplying the mat seedling 112 to the seedling placing stand 17 from the state where the seedling collecting plate 99 is temporarily placed as described above will be described.

After temporarily placing the seedling plate 99 on the fertilizer hopper 27x, when supplying the mat seedling 112 to the seedling stage 17, the operator places the front end portion of the seedling plate 99 as shown in FIG. lift. Thereby, as shown by the arrow in FIG. 30, the seedling plate 99 rotates around the protruding portion 122. Thus, the protrusion 122 can serve as a fulcrum when the seedling plate 99 is rotated. Therefore, it can also be said that the protrusion part 122 of this embodiment is a rotation fulcrum part.

In particular, in this embodiment, the rotation fulcrum part (protrusion part 122) is disposed at a position rearward in the front-rear direction of the lid part 88 of the fertilizer hopper 27x. Thereby, when the seedling plate 99 is rotated around the protruding portion 122, the tip 99a of the seedling plate 99 wraps around the rear side (the seedling stage 17 side) of the fertilizer hopper 27x (see FIG. 30). Thus, according to the configuration of the present embodiment, the seedling plate 99 can be moved so as to straddle the fertilizer hopper 27x. As a result, the operator can easily supply the mat seedling 112 to the seedling mount 17 from the driver seat 6 side through the fertilizer hopper 27x.

Also, the operator can slide the seedling plate 99 along the front-rear direction of the vehicle body (the left-right direction in FIG. 30) simultaneously with rotating the seedling plate 99 as described above. In the state where the front end portion of the seedling plate 99 is lifted (the state shown in FIG. 30), the seedling plate 99 is supported only by the upper surface of the protruding portion 122. Since the upper surface of the protrusion 122 has a rounded shape, the protrusion 122 and the seedling plate 99 are in contact with each other by a “line”, and the contact area between the two is small. For this reason, the frictional resistance when the seedling plate 99 is slid is small. Therefore, the operator can slide the seedling plate 99 smoothly in the front-rear direction of the vehicle body.

As described above, the operator rotates the seedling plate 99 around the protruding portion 122 and slides the seedling plate 99 back and forth, so that the tip 99a of the seedling plate 99 is positioned at the upper end 17a of the seedling stage 17. Can be adapted to

Thus, according to the configuration of the seedling supply assisting unit 121 of the embodiment, the operator aligns the seedling collecting plate 99 and the seedling placing stand 17 while supporting the weight of the seedling collecting plate 99 by the protruding portion 122. It can be carried out. As a result, the operator can easily perform the alignment, and the burden on the operator can be reduced.

Then, the operator places the mat seedling placed on the seedling plate 99 in a state where the tip 99a of the seedling plate 99 and the upper end 17a of the seedling platform 17 are appropriately aligned (for example, the state shown in FIG. 30). 112 is supplied to the seedling stage 17. Thus, since the mat seedling 112 is supplied to the seedling mounting base 17 in a state where the seedling collecting plate 99 and the seedling mounting base 17 are aligned, the supply can be reliably performed.

Also, as described above, the planting unit 3 can be driven up and down. Therefore, when the mat seedling 112 is supplied to the seedling stage 17, the planting part is arranged so that the upper end 17 a of the seedling stage 17 is lower than the upper end of the protruding part (support part) 52. It is preferable to adjust the vertical position of 3 in advance (state shown in FIG. 29). According to this, when the tip 99a of the seedling collection plate 99 and the upper end 17a of the seedling placing table 17 are aligned, the tip 99a of the seedling collection plate 99 is in a state of facing downward (shown in FIG. 30). Status). Therefore, from this state, the mat seedling 112 placed on the seedling collecting plate 99 can be slid down toward the seedling placing stand 17. Thereby, the mat seedling 112 can be easily supplied to the seedling mount 17.

As described above, the rice transplanter 1x of the present embodiment includes the vehicle body 2, the planting unit 3, and the seedling supply auxiliary unit 121. The vehicle body 2 includes a driver seat 6. The planting unit 3 includes a seedling stage 17 on which the mat seedling 112 is placed and is located behind the vehicle body 2. The seedling supply assisting unit 121 can place a substantially plate-shaped seedling collecting plate 99 on which a mat seedling 112 is placed at a position between the driver's seat 6 and the seedling placing stand 17 in the front-rear direction of the vehicle body 2. The seedling supply assist unit includes a protrusion 122. The projecting portion 122 has a function as a support portion that supports the seedling collecting plate 99 placed from below. The protrusion 122 also functions as a rotation fulcrum that becomes a fulcrum when the seedling plate 99 supported by the protrusion 122 is rotated.

Thus, by allowing the seedling collection plate 99 to be placed between the driver's seat 6 and the seedling stage 17, the burden on the operator who supplies the mat seedling 112 can be reduced. Then, by rotating the seedling plate 99 in a state where it is supported by the projecting portion 122, the seedling plate 99 can be inclined toward the seedling table 17. The seedling 112 can be easily supplied.

Also, as described above, in the rice transplanter 1x of the present embodiment, the planting unit 3 is configured to be driven up and down. As a result, the upper end 17 a of the seedling stage 17 can be lowered to a position lower than the upper surface of the protruding portion 122.

As described above, the mat seedling 112 can be slid down toward the seedling stage 17 by lowering the seedling stage 17 to a position lower than the projecting portion 122. Thereby, the mat seedling 112 can be easily supplied to the seedling mount 17.

In addition, as described above, in the rice transplanter 1x of the present embodiment, the seedling supply auxiliary unit 121 includes the protruding portion 122 that is convex upward. And the protrusion part 122 serves as the said support part and the said rotation fulcrum part.

Thus, the seedling plate 99 can be supported by the projecting portion 122 that protrudes upward, and the seedling plate 99 can be rotated with the tip of the projecting portion 122 as a fulcrum. Thereby, seedling supply auxiliary part 121 is realizable by simple composition.

As described above, the rice transplanter 1x of the present embodiment includes the fertilizer hopper 27x that accommodates the fertilizer between the driver seat 6 and the seedling stage 17. The upper end of the protrusion part 122 is arrange | positioned in the position higher than the upper surface of the cover part 88 of the fertilizer hopper 27x. When viewed in the left-right direction of the vehicle body, the common tangent line 123 between the upper surface of the protruding portion 122 and the upper surface of the lid portion 88 is configured not to interfere with the center portion 88a in the front-rear direction of the upper surface of the lid portion 88. Has been. The seedling supply assisting unit 121 supports the seedling collecting plate 99 from below by the upper surface of the protruding portion 122 and the upper surface of the lid portion 88.

With this configuration, the seedling collection plate 99 can be stably supported in a state where the seedling plate 99 is floated from the central portion 88a on the upper surface of the lid 88.

Further, as described above, in the rice transplanter 1x of the present embodiment, the protruding portion 122 is located behind the center portion 88a of the lid portion 88 of the fertilizer hopper 27x in the front-rear direction of the vehicle body 2. Yes.

This makes it possible to easily supply the mat seedling 112 to the seedling mount 17 from the driver seat 6 side through the fertilizer hopper 27x.

Further, as described above, in the rice transplanter 1x of the present embodiment, the rear end portion of the lid portion 88 of the fertilizer hopper 27x is rotatably connected to the hopper body 87 via the hinge portion 115. . A rain avoiding portion 145 that covers the front surface of the hopper main body 87 when the lid portion 88 is closed is provided at the front end portion of the lid portion 88.

By providing the rain avoiding portion 145 in this way, when the lid portion 88 is opened, the rain avoiding portion 145 covers the opening of the hopper body 87 from above. Thereby, even if it opens the cover part 88 at the time of rainy weather, it can prevent rain water falling in the hopper main body 87. FIG. Further, when the lid 88 is closed, the rain avoiding portion 145 covers the front surface of the hopper main body 87, so that the rain avoiding portion 145 does not get in the way.

Also, as described above, in the rice transplanter 1x of the present embodiment, the rain avoiding portion 145 is rotatable with respect to the lid portion 88.

By rotating the rain avoiding portion 145, the rain avoiding portion 145 can be retreated to a position where it does not get in the way. Thereby, the rain avoiding portion 145 does not get in the way during work when it is not raining.

Subsequently, a modification of the third embodiment will be described with reference to FIGS. 31 to 34.

In this modified example, the seedling supply assisting part 121 has a roller member 124 instead of the protruding part 122 of the third embodiment.

The roller member 124 is disposed on the upper surface of the lid 88 as shown in FIG. The roller member 124 is configured to be rotatable about a rotation shaft 125 parallel to the left-right direction of the vehicle body. The rotating shaft 125 is supported by the lid portion 88. Moreover, the rotating shaft 125 is formed at a rearward position in the front-rear direction of the fertilizer hopper 27x. As shown in FIG. 31, when viewed in the left-right direction of the vehicle body, a common tangent line 123 between the upper surface of the roller member 124 and the upper surface of the lid 88 is the front-rear direction of the upper surface of the lid 88. It is configured not to interfere with the central portion 88a.

As described above, in this modification, the roller member 124 is provided on the upper surface of the lid portion 88 of the fertilizer hopper 27x instead of the protruding portion 122. Also in this modified example, the seedling collecting plate 99 can be placed on the fertilizer hopper 27x. This is shown in FIG. That is, as shown in FIG. 33, the seedling plate 99 can be supported from below by the peripheral surface of the roller member 124 and the upper surface of the lid portion 88. Therefore, in this modification, it can be said that the roller member 124 and the lid portion 88 are support portions.

FIG. 34 shows a state where the front end portion of the seedling collection plate 99 is lifted from the state of FIG. As shown in FIG. 34, the seedling plate 99 rotates around the rotation shaft 125 of the roller member 124 while being supported by the roller member 124 from below. Thus, in this modification, since the roller member 124 is rotatable, the seedling plate 99 supported by the roller member 124 can be easily rotated around the rotation shaft 125. Therefore, in this embodiment, it can be said that the rotating shaft 125 of the roller member 124 is a rotation fulcrum part.

Further, in this modification, the seedling plate 99 is supported by the rotatable roller member 124, so that the seedling plate 99 is smoothly slid along the longitudinal direction of the vehicle body (the left-right direction in FIG. 34). be able to.

As described above, in the present modification, the seedling plate 99 can be rotated and slid while the seedling plate 99 is supported by the rotatable roller member 124. Thereby, alignment with the front-end | tip 99a of the seedling collection board 99 and the upper end 17a of the seedling mounting stand 17 can be performed smoothly.

As described above, in the above-described modification, the seedling supply auxiliary unit 121 has a rotatable roller member 124. The peripheral surface of the roller member 124 functions as a support portion. Further, the rotation shaft 125 of the roller member 124 functions as a rotation fulcrum portion.

In this way, the seedling plate 99 can be supported by the peripheral surface of the roller member 124. In addition, the seedling plate 99 supported by the roller member 124 can be rotated about the rotation shaft 125. Further, since the roller member 124 can rotate, the seedling plate 99 supported by the roller member 124 can be easily slid.

Subsequently, a fourth embodiment of the present invention will be described with reference to FIGS.

In the fourth embodiment shown in FIG. 35, a cover member 132 is provided on the fertilizer hopper 27x.

The cover member 132 is disposed so as to cover the upper surface of the lid portion 88. The cover member 132 is a thin plate-like member having a certain degree of rigidity, and can be made of, for example, a sheet metal. The cover member 132 is configured to be in close contact with the upper surface of the lid portion 88 so that there is no gap. As described in the third embodiment, the upper surface of the lid portion 88 is curved so as to be convex upward. Therefore, as shown in FIG. 35, the cover member 132 is formed to be curved so as to protrude upward along the upper surface of the lid portion 88. Thereby, the cover member 132 can be brought into close contact with the upper surface of the lid portion 88.

The cover member 132 is attached to the hopper body 87 via a rotation shaft (cover member rotation shaft) 133. The rotating shaft 133 is disposed on the back surface (surface facing rearward) of the hopper body 87. The rotating shaft 133 is provided in parallel with the left-right direction of the vehicle body. The cover member 132 is configured to be able to rotate around the rotation shaft 133. By rotating the cover member 132 rearward around the rotation shaft 133, the upper surface of the lid portion 88 can be exposed.

Subsequently, the effect of providing the cover member 132 as described above will be described.

That is, as described above, a caution sticker (not shown) is pasted on the upper surface of the lid portion 88 of the fertilizer hopper 27x. However, this caution sticker may become dirty or peel off due to mud or the like. For this reason, when using the rice transplanter 1x, the notice sticker gradually became difficult to read.

Therefore, the rice transplanter of the fourth embodiment is provided with the cover member 132 that covers the upper surface of the lid 88 as described above. Thereby, since the upper surface of the cover part 88 is not soiled or rubbed, it is possible to prevent the caution sticker from being stained or peeled off. Thereby, the state where the caution sticker is easy to read can be maintained for many years.

In this embodiment, as described above, the cover member 132 is formed so as to be in close contact with the upper surface of the lid portion 88. This makes it difficult for muddy water and dust to enter between the lid portion 88 and the cover member 132. Thereby, the upper surface of the cover part 88 becomes further difficult to get dirty.

In addition, when supplying fertilizer to the fertilizer hopper 27x, it is necessary to open the cover part 88. FIG. In this case, the operator may rotate the cover member 132 later around the rotation shaft 133 to expose the cover 88, and then open the cover 88. Then, after the supply of fertilizer is finished, the lid 88 is closed and the cover member 132 is returned to the original position, thereby covering the lid 88 with the cover member 132. Further, when confirming the caution sticker (not shown) attached to the upper surface of the lid portion 88, the operator may rotate the cover member 132 rearward to expose the upper surface of the lid portion 88. Then, the operator who has confirmed the notice sticker returns the cover member 132 to the original position, thereby covering the lid portion 88 with the cover member 132.

As described above, since the cover member 132 can be rotated around the rotation shaft 133, the cover member 132 can be rotated to easily expose the cover portion 88. As a result, the cover 88 can be exposed only when necessary, and the cover 88 can be covered with the cover member 132 at other times, so that the upper surface of the cover 88 can be reliably prevented from becoming dirty.

Subsequently, the configuration of the seedling supply auxiliary unit 131 in the fourth embodiment will be described.

The seedling supply auxiliary part 131 of the fourth embodiment has the cover member 132 described above. And the seedling supply auxiliary | assistant part 131 of 4th Embodiment is comprised so that it may mount in the seedling collection board 99 on the cover member 132 (FIG. 36).

As described above, the cover member 132 of this embodiment is formed in a curved shape so as to protrude upward. For this reason, even if the seedling plate 99 is placed on the curved cover member 132 as it is, the seedling plate 99 cannot be stably supported. Therefore, in the seedling supply auxiliary unit 131 of the fourth embodiment, a protruding portion 134 that protrudes upward is provided on the upper surface of the cover member 132.

The protruding portion 134 is formed at a rearward position in the front-rear direction of the fertilizer hopper 27x, similarly to the protruding portion 122 of the third embodiment. As shown in FIG. 35, when viewed in the left-right direction of the vehicle body, the tip (upper end) of the protrusion 122 has a rounded shape. Moreover, the protrusion part 134 is elongate along the left-right direction of a vehicle body similarly to the protrusion part 122 of 3rd Embodiment (not shown). Moreover, the protrusion part 134 is formed over substantially the full width of the left-right direction of the cover member 132 (not shown). Note that the protruding portion 134 of the present embodiment is formed integrally with the cover member 132.

In the seedling supply auxiliary part 131 of the fourth embodiment configured as described above, the seedling collection plate 99 is supported from below by the upper surface of the protruding part 134 and the upper surface of the cover member 132, as shown in FIG. be able to. Therefore, in this 4th Embodiment, it can be said that the protrusion part 134 and the cover member 132 are support parts.

Also in the fourth embodiment, as in the third embodiment, by lifting the front end of the seedling plate 99 from the state shown in FIG. 36, the seedling plate 99 is rotated about the protruding portion 134 as a fulcrum. (Not shown). In this case, it can be said that the protrusion part 134 is a rotation fulcrum part.

In the present embodiment, since the cover member 132 is configured to rotate about the rotation shaft 133, after the seedling plate 99 is placed on the cover member 132 (and the protruding portion 134), FIG. As shown, the seedling plate 99 can be rotated together with the cover member 132 (and the protruding portion 134). Thus, since the seedling plate 99 is rotated while being placed on the cover member 132, the seedling plate 99 can be rotated in a stable state. In this case, the seedling plate 99 rotates around the rotation shaft 133 of the cover member 132. Therefore, in this case, it can be said that the rotation shaft 133 of the cover member 132 is a rotation fulcrum portion.

As described above, in the seedling supply auxiliary unit 131 of the present embodiment, the seedling plate 99 is placed on the cover member 132 that covers the lid portion 88 of the fertilizer hopper 27x. There is no direct contact with the upper surface of the lid 88. Therefore, the upper surface of the lid portion 88 does not rub against the seedling plate 99. Thereby, it can prevent reliably that the cautionary sticker stuck on the upper surface of the said cover part 88 gets dirty or peels.

As described above, the rice transplanter of this embodiment is configured as follows. That is, the rice transplanter includes a fertilizer hopper 27x that stores fertilizer between the driver seat 6 and the seedling stage 17. The seedling supply assisting unit 131 includes a cover member 132 that is disposed so as to cover the upper surface of the lid portion 88 of the fertilizer hopper 27x and is rotatable about a rotation shaft 133 that is parallel to the left-right direction of the vehicle body. . A projecting portion 134 as a support portion is provided on the upper surface of the cover member 132. And the rotating shaft 133 of the cover member 132 functions as a rotation fulcrum part.

Thus, by providing the cover member 132 that covers the upper surface of the lid portion 88, the upper surface of the lid portion 88 can be reliably prevented from being damaged or dirty. Further, the seedling collection plate 99 can be supported by the protrusion 134 provided on the upper surface of the cover member 132. Then, by rotating the cover member 132 about the rotation shaft 133, the seedling collection plate 99 supported by the projecting portion 134 can be tilted toward the seedling mount 17. Thereby, it is possible to easily supply the mat seedling 112 to the seedling placing stand 17.

Subsequently, a modification of the fourth embodiment will be described with reference to FIG. In the modification shown in FIG. 38, a roller member 135 is provided instead of the protrusion 134 of the fourth embodiment.

The roller member 135 is disposed on the upper surface of the cover member 132. The roller member 135 is configured to be rotatable about a rotation shaft 136 parallel to the left-right direction of the vehicle body. The rotation shaft 136 of the roller member 135 is formed at a rearward position in the front-rear direction of the fertilizer hopper 27x. The rotating shaft 136 is supported by the cover member 132.

As described above, the roller member 135 can be provided on the upper surface of the cover member 132 instead of the protruding portion 134. According to this, the seedling plate 99 can be supported by the roller member 135 as in the modification of the third embodiment (FIGS. 31 to 34). Therefore, in this modification, it can be said that the roller member 135 is a support part. Since the roller member 135 is rotatable, the seedling plate 99 supported by the roller member 135 can be smoothly slid.

Subsequently, a fifth embodiment of the present invention will be described.

In the seedling supply auxiliary part of the third embodiment and the fourth embodiment, the seedling collecting plate 99 is placed on the lid part 88 of the fertilizer hopper 27x. However, the placement of the seedling collecting plate 99 is not limited to the top of the cover portion 88 of the fertilizer hopper 27x. In addition to the fertilizer hopper 27x, the seedling supply assisting unit may have something like a table on which the seedling collecting plate 99 is placed.

Therefore, in the fifth embodiment, as shown in FIG. 39, a rear preliminary seedling table 113 is provided behind the driver seat 6 and in front of the seedling mounting table 17. A seedling collecting plate 99 on which a spare mat seedling is placed can be placed on the rear spare seedling stand 113. The upper surface of the rear spare seed bed 113 is substantially horizontal so that the seedling plate 99 can be placed stably. The rear spare seedling table 113 has a width that allows the number of seedling collecting plates 99 corresponding to the number of strips of the rice transplanter 1x to be placed side by side in the left-right direction of the vehicle body. Since the rice transplanter of this embodiment is four-row planting, the rear preliminary seedling table 113 has a width that allows the four seedling collection plates 99 to be placed side by side in the left-right direction of the vehicle body 2.

As described above, the rice transplanter 1x of the present embodiment has the rear spare seedling table 113 on which the seedling collecting plate 99 can be placed, immediately in front of the seedling placing table 17. Therefore, the distance that the operator has to carry the seedling plate 99 to the seedling stage 17 is shorter than that in the third embodiment and the fourth embodiment. Thereby, labor for supplying the mat seedling 112 to the seedling stage 17 can be saved.

Thus, since the rear spare seedling table 113 of the present embodiment can place the seedling collecting plate 99 between the driver seat 6 and the seedling mounting table 17, the rear preliminary seedling table 113 is a seedling supply assisting unit. be able to.

Also, the rear preliminary seedling table 113 can support the seedling collection plate 99 from below by its upper surface. Therefore, it can be said that the upper surface of the rear preliminary seedling table 113 is a support portion.

As shown in FIG. 39, the rear preliminary seedling table 113 is disposed above the fertilizer hopper 27x. Thereby, the seedling collection board 99 can be mounted using the space above the fertilizer hopper 27x effectively. However, if the rear spare seedling stand 113 is positioned above the fertilizer hopper 27x, the lid portion 88 of the fertilizer hopper 27x cannot be opened.

Therefore, the rear preliminary seedling table 113 is configured to be able to rotate so as to spring up around a rotation shaft (preliminary seedling rotation shaft) 114 (FIG. 40). The rotating shaft 114 is disposed in parallel with the left-right direction of the vehicle body and is provided in the vicinity of the rear end portion of the rear preliminary seedling table 113. Thus, the upper part of the cover part 88 of the fertilizer hopper 27x can be opened by rotating the rear preliminary seedling stand 113 around the rotation shaft 114 so as to jump up. Thereby, it becomes possible to open the cover part 88 of the fertilizer hopper 27x (FIG. 40).

Subsequently, a state in which the mat seedling 112 is supplied to the seedling placing stand 17 from the state where the seedling collecting plate 99 is placed on the rear spare seedling stand 113 of the present embodiment will be described.

41. In this case, as shown in FIG. 41, the rear spare seedling table 113 with the seedling plate 99 placed thereon is rotated so as to spring up around the rotation shaft 114. Thereby, the seedling plate 99 placed on the rear preliminary seedling table 113 can be tilted so that the tip 99a of the seedling plate 99 and the upper end 17a of the seedling table 17 can be aligned. Then, the mat seedling 112 placed on the seedling collecting plate 99 is slid down on the seedling placing stand 17 in such a state of alignment.

As described above, in the present embodiment, the rear spare seedling table 113 can be rotated together with the seedling collecting plate 99 in a state where the seedling collecting plate 99 is placed on the rear preliminary seedling stand 113. In this case, the seedling plate 99 rotates around the rotation shaft 114 of the rear spare seedling table 113. Therefore, in this case, it can be said that the rotation shaft 114 of the rear preliminary seedling table 113 is a rotation fulcrum portion.

As described above, in the present embodiment, the seedling supply auxiliary unit is the rear preliminary seedling table 113 on which a plurality of seedling collecting plates 99 can be placed. The rear preliminary seedling table 113 is configured to be rotatable around a rotation shaft 114 parallel to the left-right direction of the vehicle body. Accordingly, the rotation shaft 114 functions as a rotation fulcrum portion.

As described above, if the rear spare seedling stand 113 is provided between the driver seat 6 and the seedling placing stand 17, the seedling collecting plate 99 can be placed on the rear spare seedling stand 113. Then, by rotating the rear spare seedling stand 113, the seedling collecting plate 99 placed on the rear preliminary seedling stand 113 can be tilted toward the seedling placing stand 17. Thereby, it is possible to easily supply the mat seedling 112 to the seedling placing stand 17.

In addition, about 3rd Embodiment to 5th Embodiment, said structure can be changed as follows, for example.

In the third embodiment (or a modification thereof), the protrusion 122 (or the roller member 124) is provided on the upper surface of the lid portion 88 of the fertilizer hopper 27x. However, the invention is not limited thereto, and the protruding portion 122 (or the roller member 124) may be provided separately from the lid portion 88. That is, the protrusion 122 (or the roller member 124) is only required to support the seedling plate 99 from below, and does not need to be provided on the lid 88 of the fertilizer hopper 27x.

In the third to fifth embodiments, the fertilizer applicator 8x may be omitted.

In the fifth embodiment, the upper surface of the rear preliminary seedling table 113 is substantially horizontal. However, the present invention is not limited to this, and a protrusion or a roller member as shown in the third embodiment and the fourth embodiment can be arranged on the upper surface of the rear preliminary seedling table 113. Thereby, the seedling collecting plate 99 placed on the upper surface of the rear spare seedling 70 can be smoothly slid.

In the present invention, the “seedling member” includes a wide range of substantially plate-like members that can carry mat seedlings. Therefore, the seedling collecting member placed on the seedling supply assisting unit is not limited to the seedling collecting plate 99.

For example, as shown in FIG. 42, the seedling box 140 in which the mat seedling is accommodated has a bottom plate 142 on which the mat seedling is placed. Therefore, it can be considered that the seedling box 140 is also a kind of “seedling member”. Therefore, instead of the seedling collecting plate 99, the seedling box 140 may be placed on the seedling supply auxiliary unit. In this case, it is preferable to remove one of the four walls of the seedling box 140 as the seedling box 140 shown in FIG. In this way, the mat seedling (not shown) accommodated in the seedling box 140 can be slid down from the bottom plate 142 by tilting the seedling box 140 so that the open portion 140a faces downward. Thereby, the mat seedling can be directly supplied from the seedling box 140 to the seedling mounting stand 17.

In the third embodiment, the rain avoiding portion 145 is rotatable with respect to the lid portion 88. However, the present invention is not limited to this. For example, the rain avoiding portion 145 and the lid portion 88 may be integrally formed. good.

1 Scatter work vehicle (work vehicle)
1x Rice transplanter (work vehicle)
2 Car body 3 Direct seeding device 8 Direct seeding device (granular material spraying device)
8x fertilizer applicator (granular material spraying device)
9 Seed feeding device (granular material feeding device)
9x fertilizer feeding device (granular material feeding device)
20 hopper 21 feeding case 28 feeding roll (feeding part)
30 driven gear 31 drive gear 32 drive transmission shaft 33 left side wall (driven gear support)
49 Drive gear support

Claims

Arranged below the hopper for accommodating the granular material, comprising a feeding case to which the granular material is supplied,
In the feeding case, a feeding portion for feeding the granular material by a predetermined amount is provided,
The feeding case is
A driven gear support portion that supports a driven gear that rotates integrally with the feeding portion;
A drive gear support that supports a drive gear meshing with the driven gear;
A granular material feeding device characterized by comprising:
The granular material feeding device according to claim 1,
The granular material feeding device, wherein the driven gear support portion and the drive gear support portion are integrally formed.
The granular material feeding device according to claim 1,
A plurality of the feeding cases are provided,
Each feeding case is provided with a drive transmission shaft that is arranged with the axis line aligned with the drive gear, and transmits a driving force to the drive gear,
The drive transmission shaft is provided independently for each feeding case,
A granular material feeding device comprising a connecting portion for connecting the drive transmission shafts of adjacent feeding cases.
The granular material feeding device according to claim 3,
In each feeding case, a granular material feeding device having a clutch mechanism between the drive transmission shaft and the driving gear.
The granular material feeding device according to claim 1,
The feeding unit has an adjustment mechanism capable of adjusting an amount of feeding out the granular material,
The feeding case is
An adjustment gear fixed to the adjustment shaft of the adjustment mechanism;
An operation gear support that supports an operation gear that can mesh with the adjustment gear;
A granular material feeding device comprising:
The granular material feeding device according to claim 5,
By moving the rotation shaft of the operation gear in a direction approaching or separating from the adjustment shaft, the operation gear can be switched between a state in which the adjustment gear and the operation gear are engaged and a state in which the operation gear is not engaged. A granular material feeding device characterized by comprising:
The granular material feeding device according to claim 6,
A plurality of feeding cases are arranged in one direction, and the adjustment gear and the operation gear are provided corresponding to each of the plurality of feeding cases,
The granular material feeding device, wherein the rotation shafts of the operation gears are connected to each other.
The granular material feeding device according to claim 6,
The granular material feeding device, wherein an operation gear support portion for supporting a rotation shaft of the operation gear is fixedly provided in the feeding case.
The granular material feeding device according to claim 6,
A link member capable of contacting the rotating shaft of the operation gear;
The granular material feeding device according to claim 1, wherein the link member is rotated around a link operation shaft to move the rotation shaft of the operation gear in a direction approaching or separating from the adjustment shaft.
The granular material feeding device according to claim 6,
The granular material feeding device according to claim 1, wherein a moving direction of the rotating shaft of the operation gear when approaching the adjusting shaft is directed to a position shifted from an axis center of the adjusting shaft.
The granular material feeding device according to claim 1;
The hopper;
A drive output gear that is rotationally driven by a drive force from a drive source;
A transport unit that transports the granular material fed from the granular material feeding device to the ground;
With
The supply unit for supplying the granular material includes the hopper and the granular material feeding device,
The supply unit
The feeding section;
A drive input gear to which a driving force for driving the feeding portion is input;
With
The supply unit is configured to be movable between a work position where the granular material can be supplied to the transport unit and an open position separated from the transport unit,
When the supply unit is in the working position, the drive output gear and the drive input gear mesh with each other,
The granular material spraying apparatus, wherein the drive input gear is separated from the drive output gear by moving the supply unit from the work position toward the open position.
The granular material spraying device according to claim 11,
A plurality of the supply units are provided,
The granular material spraying device, wherein the drive input gear included in each supply unit can mesh with the drive output gear.