JP6917938B2 - Field work machine - Google Patents

Description

The present invention relates to a field work machine provided with a supply device for supplying agricultural materials to a field, a hopper for storing agricultural materials, and a feeding portion provided below the hopper and communicating with the hopper.

For example, Patent Document 1 discloses a riding-type seedling transplanting machine provided with a supply device (fertilizer application device 5 in the document) for supplying agricultural materials to a field, and a hopper (powder grains in the document) for storing agricultural materials in the supply device. A body hopper 60) and a feeding portion (a feeding portion 61 of the document) provided below the hopper and communicating with the hopper are provided. Further, inside the feeding portion, a feeding roll (feeding roll 73 of the document) for feeding agricultural materials from the hopper by rotation is provided, and a brush unit (brush 76 of the document) that is in sliding contact with the outer peripheral surface of the feeding roll is detachably provided. Has been done.

Japanese Unexamined Patent Publication No. 2017-12217

In the conventional supply device, the feeding roll and the brush unit are detachably attached to each other independently. However, when the supply device is maintained, for example, when the agricultural material is clogged, it is used for agriculture. There is a possibility that the material may hinder the attachment / detachment of the feeding roll and the brush unit, and there is room for improvement in order to facilitate the attachment / detachment of the feeding roll and the brush unit.

An object of the present invention is to provide a field work machine that facilitates attachment / detachment of a feeding roll and a brush unit.

The field work machine of the present invention
The supply device for supplying the agricultural material to the field is provided with a hopper for storing the agricultural material and a feeding portion provided below the hopper and communicating with the hopper.
A roll unit equipped with a feeding roll for feeding the agricultural material from the hopper by rotation and a brush unit arranged side by side with the roll unit are detachably stored in the feeding portion.
The brush unit is provided with a brush that is in sliding contact with the outer peripheral surface of the feeding roll, and a base portion that supports the brush with its lower end positioned above the rotation axis of the feeding roll.
The base portion comes into contact with the roll unit.

According to the present invention, since the feeding roll is mounted on the roll unit and the roll unit is detachably stored in the feeding portion, it is possible to configure the roll unit so that agricultural materials pass only at the position of the feeding portion. It becomes. Therefore, the roll unit can be integrally attached to and detached from the feeding roll without being hindered by the clogging of agricultural materials. Further, since the base portion of the brush unit is in contact with the roll unit, the position of the roll unit is held by the base portion when the feeding portion is fed, and the brush unit is integrated with the roll unit during maintenance of the feeding portion. It can be removed. As a result, a field work machine that facilitates attachment / detachment of the feeding roll and the brush unit is realized.

In the present invention
It is preferable that a hollow hole is formed on the shaft core side of the feeding roll, and the feeding roll is fitted onto a shaft member that engages with the hole.

According to this configuration, the feeding roll is externally fitted to the shaft member which is the rotation support shaft of the feeding roll. It can be fitted or a plurality of manipulator rolls having a small width in the axial direction can be externally fitted. Therefore, a single specification shaft member can be commonly used for supply devices having various specifications, and the configuration of the roll unit can be simplified.

In the present invention
It is preferable that the roll unit is configured so that a plurality of the feeding rolls can be mounted on the same shaft core.

With this configuration, a plurality of feeding rolls can be mounted on the roll unit, and since each feeding roll follows the same axis, the configuration of the roll unit can be simplified.

In the present invention
It is preferable that the lower part of each of the feeding rolls is communicated with a transport path toward a different planting line.

With this configuration, one roll unit can handle the work of supplying agricultural materials to a plurality of planting rows.

In the present invention
It is preferable that a plurality of the brush units can be mounted adjacent to the outer periphery of each of the feeding rolls.

With this configuration, the brush unit can be easily removed integrally with the roll unit during maintenance of the feeding portion.

In the present invention
It is preferable that an engaging portion that rotatably engages with each other is formed at a portion facing the pair of the feeding rolls mounted on the roll unit.

According to this configuration, since the engaging portion is formed at the position where the feeding rolls face each other, the pair of feeding rolls can be supported by each other by the engaging portion. Therefore, for example, it is possible to extend another feeding roll along the axis direction, and it is possible to configure a feeding device having various specifications by a plurality of feeding rolls. The engaging portion in the present invention may be provided on the feeding roll alone, or may be provided on the shaft member with the feeding roll fitted on the shaft member. That is, the shaft member that is fitted onto the feeding roll is also included in one configuration of the feeding roll.

In the present invention
Among the roll units, a closing lid for closing the upper part of the roll unit is provided at a storage location where the feeding roll is not used so as not to communicate with the hopper.
It is preferable that the lower part of the hopper is provided with an inclined guide plate that is inclined so as to block the upper part of the storage portion and guides the agricultural material only to the feeding roll to be used.

If agricultural materials enter the storage location of the feeding roll that is not used for supplying agricultural materials, there is a risk that the agricultural materials will remain in the storage location and will not be supplied to the field surface of the field. With this configuration, it is possible to suitably prevent agricultural materials from entering the storage location by the closing lid. Further, since the agricultural material located at the location overlapping the storage location in the plan view is guided by the feeding roll used by the inclined guide plate, the agricultural material in the hopper can be utilized without waste.

It is an overall side view of a rice transplanter. It is an overall plan view of a rice transplanter. It is a side view of the transport pipeline extending over a fertilizer application device and a seedling planting device. It is a top view of the transport pipeline extending over a fertilizer application device and a seedling planting device. It is a top view which shows the lower part with respect to the hopper in a fertilizer application device. It is a side sectional view of the fertilizer application device. It is an exploded perspective view of a feeding part and an opening / closing lid. It is a perspective view which shows the assembly of a roll case and a brush unit. It is a perspective view which shows the assembly of a roll case and a brush unit. It is a top view of the feeding part. It is sectional drawing which shows the front sectional view of the extension part. It is a rear view which shows the residual material discharge line of a fertilizer application device. It is a front sectional view of the fertilizer application apparatus which shows the closed structure of the feeding part.

[Basic configuration of field work machine]
Embodiments of the present invention will be described with reference to the drawings. Here, a passenger-type rice transplanter will be described as an example of the field work machine of the present invention. As shown in FIGS. 1 and 2, in the present embodiment, the arrow F is the front side of the traveling machine 1, the arrow B is the rear side of the traveling machine 1, and the arrow L is the traveling machine 1. The left side of the machine, the arrow R is the right side of the traveling machine 1.

The passenger-type rice transplanter includes a traveling machine 1 having a pair of left and right steering wheels 2 and a pair of left and right rear wheels 3, and an eight-row planting type seedling planting device W as a work device capable of planting seedlings in a field. And are provided. The pair of left and right steering wheels 2 are provided on the front side of the traveling machine 1 so that the direction of the traveling machine 1 can be changed and operated, and the pair of left and right rear wheels 3 are provided on the rear side of the running body 1. Has been done. The seedling planting device W is vertically connected to the rear end of the traveling machine body 1 via a link mechanism 5 that moves up and down by expanding and contracting the lifting hydraulic cylinder 4.

An openable and closable bonnet 6 is provided at the front portion of the traveling machine body 1. At the tip position of the bonnet 6, a rod-shaped center mascot 7 is provided as a guide for traveling along an index line (not shown) drawn on the field by a marker (not shown). The traveling machine body 1 is provided with a body frame 1F extending in the front-rear direction, and a support support column frame 8 is erected at the front portion of the body frame 1F.

The engine E is provided in the bonnet 6. Although not described in detail, the power of the engine E is transmitted to the steering wheels 2 and the rear wheels 3 via the transmission provided in the machine body, and the power after the shift is an electric motor-driven planted clutch (not shown). It is transmitted to the seedling planting device W via.

The eight-row planting type seedling planting device W is provided with four transmission cases 10, eight rotating cases 11, a ground leveling float 12, a seedling loading platform 13, and a ground leveling rotor 14. The rotary case 11 is rotatably supported on the left side portion and the right side portion of the rear portion of each transmission case 10, respectively. A pair of rotary planting arms 15 are provided at both ends of each of the rotating cases 11. The ground leveling float 12 prepares the ground surface by following the ground surface of the field on the ground, and is provided in a plurality of seedling planting devices W. A mat-shaped seedling for planting is placed on the seedling stand 13.

The seedling planting device W rotates and drives each rotary case 11 by the power transmitted from the transmission case 10 while driving the seedling stand 13 back and forth sideways, and planting each from the lower part of the seedling stand 13. Seedlings are alternately taken out by the arm 15 and planted on the surface of the field. The seedling planting device W is configured to plant seedlings by planting arms 15 provided in a plurality of rotating cases 11. When there are four rotating cases 11, it is a four-row planting type, when there are six rotating cases 11, it is a six-row planting type, when there are eight rotating cases 11, it is an eight-row planting type, and there are ten rotating cases 11. In the case of individual, it is a ten-row planting type.

Two spare seedling stands 16 are provided on the left and right sides of the bonnet 6 in the traveling machine 1. The spare seedling stand 16 is configured as a rail type on which spare seedlings for replenishing the seedling planting device W can be placed. A pair of left and right spare seedling frames 17 as tall frame members for supporting the spare seedling stand 16 are provided on the left and right side portions of the bonnet 6 in the traveling machine body 1, and the upper parts of the left and right spare seedling frames 17 are connected to each other. It is connected at 18.

The traveling aircraft 1 is provided with a satellite positioning unit 19. The satellite positioning unit 19 uses GPS (Global Positioning System), which is a well-known technology, as an example of a satellite positioning system (GNSS: Global Navigation Satellite System) that receives radio waves from a navigation satellite to detect the position of an aircraft. Then, find the position of the aircraft. The satellite positioning unit 19 is attached to the connecting frame 18 in a state of being located at the front portion of the traveling machine body 1. As shown in FIGS. 1 and 2, the satellite positioning unit 19 is supported at a high position by the connecting frame 18 and the spare seedling frame 17. As a result, there is little possibility that reception failure will occur in the satellite positioning unit 19, and the reception sensitivity of radio waves in the satellite positioning unit 19 can be increased.

A boarding unit 20 for performing various driving operations is provided in the central portion of the traveling machine body 1. The boarding section 20 is provided with a driver's seat 21, a steering handle 22, a main speed change lever 23, and an operation lever 24. The driver's seat 21 is provided in the central portion of the traveling machine body 1 and is configured so that the passenger can take a seat. The steering handle 22 is configured so that the steering wheel 2 can be steered by an artificial operation. The main shift lever 23 is configured so that it can switch between forward and backward movements and change the traveling speed. The operation lever 24 switches the raising and lowering operation of the seedling planting device W and the switching between the left and right leveling rotors 14. The steering handle 22, the main shift lever 23, the operation lever 24, and the like are provided on the upper part of the control tower 25 located on the front side of the driver's seat 21. Steps 26 for getting on and off are provided on both the left and right sides of the foot portion of the boarding section 20 so that the passenger can get on and off the boarding section 20 from the side of the aircraft.

When the operating lever 24 is operated to the ascending position, the planting clutch (not shown) is disengaged to cut off the transmission to the seedling planting device W, and the lifting hydraulic cylinder 4 is operated to raise the seedling planting device W. .. When the operation lever 24 is operated to the lowered position, the seedling planting device W is lowered to touch the surface of the rice field and is in a stopped state.

When starting the rice planting work, the passenger operates the operation lever 24 to lower the seedling planting device W and starts transmission to the seedling planting device W to start the rice planting work. Then, when the rice planting work is stopped, the operation lever 24 is operated to raise the seedling planting device W and block the transmission to the seedling planting device W.

[Fertilizer application device]
As shown in FIGS. 1 to 4, a fertilizer application device 30 as a supply device of the present invention is provided behind the boarding section 20, and the fertilizer application device 30 applies to seedlings planted in a field, for example, fertilizer or chemicals. Supply powders and granules that are agricultural materials such as. The fertilizer application device 30 is provided with a hopper 31, a feeding unit 32, a transport pipe line 50, a fertilizer application discharge unit 34, a groove making device 35, a blower 36, and an electric drive motor 37.

In the present embodiment, eight grooving devices 35 are provided in the vicinity of the rotating cases 11 respectively, corresponding to the eight-row planting type seedling planting device W. Grooving device 35 forms grooves in the vicinity of each planting line on the field surface of the field. Eight fertilizer discharge units 34 are integrally provided with each groove-growing device 35, and eight transport pipelines 50 are communicated with each fertilizer discharge unit 34. The groove making device 35 and the fertilizer application / discharging section 34 may be provided integrally, or the groove making device 35 and the fertilizer applying / discharging section 34 may be provided separately.

Each of the transport pipes 50 includes a first pipe 51 having rigidity, a second pipe 52 having rigidity supported by the seedling planting device W, and a third pipe 53 having flexibility. It is composed of combinations. As shown in FIG. 4, the first pipeline 51 is connected to the lower end of the feeding portion 32, and is fed from the air introduction port 51a for receiving the conveyed air of the blower 36 and the feeding portion 32 provided in the middle of the pipeline. A fertilizer application inlet 51b for receiving the powder or granular material is formed. The second pipeline 52 is supported by a support frame (not shown) of the seedling planting device W, and sends out the powder or granular material and the transport air to the fertilizer application discharge unit 34. The third pipeline 53 is a flexible hose that connects the first pipeline 51 and the second pipeline 52 in communication with each other, and the seedling planting device W can be deformed in a degree of curvature in response to an up-and-down movement. It has a good structure. The first pipeline 51 is in a state of being along the horizontal direction in the side view of the airframe, and the second pipeline 52 is inclined backward in the side view of the airframe.

As shown in FIGS. 3 and 4, four hoppers 31, 31, 31, and 31 are distributed to the left and right along the lateral direction of the machine body, and a feeding portion 32 is provided below each hopper 31. Has been done. The two hoppers 31 and 31 on the right side are connected in pairs, and the two hoppers 31 and 31 on the left side are connected in pairs. Further, two feeding rolls 38 and 38 can be attached to the feeding portion 32 of the single unit. That is, since the feeding roll 38 is configured to correspond to each of the eight transport pipelines 50, a plurality of feeding portions 32 arranged below the hopper 31 apply fertilizer for each different planting row. It is a possible configuration. The space below the respective feeding rolls 38 communicates with the fertilizer application inlet 51b of the different transport pipelines 50.

Further, a tubular air duct 39 is provided in front of the machine body of the feeding portion 32 along the lateral direction of the machine body. The air duct 39 is connected to the discharge port of the blower 36, and the air conveyed from the blower 36 is sent to the air duct 39. Eight through holes 39a are formed in the rear side of the air duct 39 for the air inlet 51a of the first pipeline 51 to penetrate, and the air inlet 51a of each first pipeline 51 is the air duct 39. It is inserted into the cylinder of. The first pipeline 51 and the air duct 39 are configured so that the through hole 39a and the air introduction port 51a are in close contact with each other over the entire circumference and the conveyed air does not leak from the through hole 39a.

Each feeding roll 38 is driven by a drive motor 37, and by the rotation of each feeding roll 38, the powder or granular material stored in the hopper 31 is fed out, and the powder or granular material is fed to the fertilizer application inlet 51b of each first pipeline 51. Will be guided. In the pipeline of the transport pipeline 50, the transport air flows from the air introduction port 51a to the fertilizer application discharge section 34, and the transport direction is the direction from the air introduction port 51a toward the fertilizer application discharge section 34. The powder or granular material guided to the fertilizer application inlet 51b is sent to the fertilizer application discharge unit 34 by the transport air of the blower 36. In other words, even if a part of the flexible third conduit 53 is inclined backward, the powder or granular material is not retained in the portion where the powder or granular material is inclined backward due to the transport wind of the blower 36, and the second is not retained. You will be guided to the pipeline 52. Then, the powder or granular material freely falls in the pipeline of the second pipeline 52 that inclines downward. Grooves are formed in the vicinity of each planting strip on the rice field surface by the groove making device 35, and the powder or granular material sent to the fertilizer application discharge unit 34 is supplied to the rice field surface groove.

The configuration in which the feeding roll 38 is driven not by the belt drive of the engine E but by the electric drive motor 37 makes it easy to control the rotation speed of the drive motor 37 according to, for example, the type of fertilizer and the vehicle speed. The amount of powder or granular material supplied to the groove can be easily adjusted. Further, based on the position information acquired by the satellite positioning unit 19 and the past fertilization record, the rotation speed of the electric drive motor 37 is increased / decreased and controlled in cooperation with the position information for each position information. The configuration may be such that the amount of fertilizer applied is adjusted.

As shown in FIG. 5, the drive motor 37 is provided on the right side of the machine body of the fertilizer application device 30, and the driving force of the drive motor 37 is transmitted to the intermediate transmission shaft 41 extending to the left and right of the machine body via the reduction gear 40 to perform intermediate transmission. The shaft 41 rotates. Four hoppers 31, 31, 31, 31 are arranged in a row along the longitudinal direction of the intermediate transmission shaft 41, and four feeding portions 32, below the four hoppers 31, 31, 31, 31. 32, 32, 32 are arranged in a row. Four output gears 42, 42, 42, 42 are provided on the intermediate transmission shaft 41 corresponding to the four feeding portions 32, 32, 32, 32, and the feeding portions 32 are engaged with the respective output gears 42. An adjustable input gear 43 (see FIGS. 7 to 11) is provided. The power of the intermediate transmission shaft 41 is transmitted to the respective feeding rolls 38 via the output gear 42 and the input gear 43, and the respective feeding rolls 38 rotate. Further, as shown in FIGS. 6 to 9, a penetrating portion 76 through which the intermediate transmission shaft 41 can penetrate is formed in the feeding portion 32.

As shown in FIGS. 4 to 6, the hopper 31 is formed in a lower constriction, and the lower end of the hopper 31 opens downward. In the vicinity of the opening of the hopper 31, a receiving net member 70 larger than the cross section of the opening is placed. The mesh of the receiving net member 70 is formed larger than the particles of the powder or granular material, and has a mesh of a size that allows, for example, pelletized fertilizer to pass through. As a result, the receiving net member 70 allows the powder or granular material to pass through, while preventing foreign matter from entering the feeding portion 32. An opening / closing lid 69 that covers the feeding portion 32 from above is connected to the lower end of the hopper 31. The opening / closing lid 69 is formed with an opening 69a that allows the passage of powder or granular material from the lower end of the hopper 31, and the hopper 31 and the feeding portion 32 are communicated with each other in a state where the opening / closing lid 69 is closed.

As shown in FIGS. 6 and 7, the opening / closing lid 69 is provided with a shutter portion 69B capable of closing the opening 69a. An opening 69b having substantially the same size as the opening 69a is formed in the shutter portion 69B. When the shutter portion 69B slides in the front direction of the machine body, the opening 69a and the opening 69b overlap in a plan view, and the powder or granular material can pass from the hopper 31 to the feeding portion 32. When the shutter portion 69B slides in the rearward direction of the machine body, the shutter portion 69B closes the opening portion 69a in a state where the opening portion 69a and the opening portion 69b do not overlap in a plan view, and the powder or granular material is transferred from the hopper 31 to the feeding portion 32. It becomes impossible to pass.

As shown in FIGS. 4 to 6, a fertilizer application frame 60 is provided in the lateral direction of the machine body of the fertilizer application device 30. The fertilizer application frame 60 is formed in a quadrilateral shape by a plurality of square members 60A, 60B, 60C, 60D, and the longitudinal direction of the fertilizer application frame 60 is along the lateral direction of the machine body. Inside the quadrilateral surrounded by the square members 60A, 60B, 60C, and 60D, the feeding portions 32 are arranged side by side in the lateral direction of the machine body. The drive motor 37 is supported by the right end of the fertilizer application frame 60, that is, the square member 60C, and the blower 36 is supported by the left end of the fertilizer frame 60, that is, the square member 60D.

As shown in FIGS. 2 and 5, the right side support frame 61 and the left side support frame 62 are connected and fixed to the left and right ends of the fertilizer application frame 60 as support frames for supporting the fertilizer application device 30. Of the right side support frame 61, the end portion on the side opposite to the side where the fertilizer application frame 60 is located is connected to the right side portion of the boarding portion 20. Further, of the left side support frame 62, the end portion on the side opposite to the side where the fertilizer application frame 60 is located is connected to the left side portion of the boarding portion 20. Further, a portion of the fertilizer application frame 60 near the center of the left and right sides of the rear end of the machine body and a rear end of the body frame 1F are connected and fixed via two rear end support frames 63 and 63. As described above, the fertilizer application frame 60 is supported at four points by the right side support frame 61, the left side support frame 62, and the two rear end support frames 63 and 63.

The right side support frame 61 extends outward from the left and right inner ends of the boarding / alighting step 26 on the right side of the machine, and the left / right position of the right side support frame 61 overlaps with the left / right position of the boarding / alighting step 26 on the right side of the machine body in the front-rear direction view. do. Further, the left side support frame 62 extends outward from the left and right inner ends of the machine body in the boarding / alighting step 26 on the left side of the machine, and the left / right position of the left side support frame 62 is the left / right position of the boarding / alighting step 26 on the left side of the machine body in the front-rear direction view. Duplicate with. That is, the right side support frame 61 and the left side support frame 62 are also used as a protective member for the boarding section 20 and a handrail for the boarding / alighting step 26.

As shown in FIGS. 4 to 6, four hopper support members 64, 64, 64, 64 are welded and fixed to the rear ends of the fertilizer frame 60 near the left and right ends. Further, as shown in FIGS. 7 to 9, a swing support shaft 33 is formed at the rear end portion of each of the feeding portions 32, and the swing support shaft 33 is placed and supported on the hopper support member 64. That is, the rear end portion of the feeding portion 32 is supported by the square member 60B via the hopper support member 64, and the front end portion of the feeding portion 32 is supported by the square member 60A. Further, the opening / closing lid 69 is also formed with a swing base end portion 69A corresponding to the swing support shaft 33. In FIG. 6, the swing support shaft 33 is located at a position overlapping the swing base end portion 69A in the side view of the machine body, and the center of the swing support shaft 33 is the shaft core X.

In addition to the swing fulcrum 33, swing fulcrums are also formed at both ends of the hopper support member 64 in the longitudinal direction. The hopper support frame 65 on the right side is swingably supported with respect to the pair of swing support shafts 33, 33 and the hopper support members 64, 64 on the right side of the machine body. The left hopper support frame 65 is swingably supported with respect to the pair of swing support shafts 33, 33 and the hopper support members 64, 64 on the left side of the machine body.

The two hopper support frames 65 and 65 are arranged side by side in the lateral direction of the airframe, and the longitudinal direction of the hopper support frame 65 is along the lateral direction of the airframe. The hopper support frame 65 is configured by welding and fixing metal pipe members and square members to each other, and two hoppers 31, 31 connected to each other along the longitudinal direction of the hopper support frame 65 support the hopper. It is mounted and supported on the frame 65.

The swing fulcrum members 66 and 66 (see FIG. 4) are welded and fixed to the left and right two positions in the rear portion of the hopper support frame 65, respectively. Through holes are formed in each of the swing fulcrum member 66, the hopper support member 64, the swing support shaft 33, and the swing base end portion 69A for the rotation pin 67 to penetrate. The rotation pin 67 penetrates the set of swing fulcrum member 66, the hopper support member 64, the swing support shaft 33, and the swing base end portion 69A, respectively, in a state where the through holes overlap each other in the side view. Will be done. As a result, the hopper support frame 65, the hopper 31, and the opening / closing lid 69 are integrally swingably supported around the axis X with respect to the hopper support member 64 and the swing support shaft 33. Further, since the feeding portion 32 is provided with the swing support shaft 33, the feeding portion 32 and the opening / closing lid 69 are less likely to be misaligned when the fertilizer applying device 30 is assembled, and the fertilizing device 30 can be easily assembled. become.

The vertical heights of the opening / closing lid 69 and the swing fulcrum member 66 are lower than the vertical height of the hopper 31 and higher than the vertical height of the feeding portion 32. Further, the hopper support frame 65, the opening / closing lid 69, and the swing fulcrum member 66 are arranged above the feeding roll 38 and the residual material discharge port 47. The opening / closing lid 69 has a working state in which the feeding roll 38 and the residual material discharge port 47 and the lower end of the hopper 31 are communicated with each other, and an open state in which the portion above the feeding roll 38 and the residual material discharge port 47 is opened. It is configured so that it can be switched to.

As shown in FIGS. 5 and 6, locking portions 68 and 68 are provided at two locations of the fertilizer application frame 60 corresponding to the central portions in the longitudinal direction in the front portions of the left and right hopper support frames 65 and 65. There is. Each locking portion 68 engages with a non-locking portion 65a formed at a central portion in the longitudinal direction in the front portion of the hopper support frame 65 to hold the hopper support frame 65 in a non-swingable position. That is, the locking portion 68 and the non-locking portion 65a form a buckle for holding the position of the hopper support frame 65.

Inside the feeding portion 32, a brush unit 44 is provided adjacent to the feeding rolls 38 arranged in the lateral direction of the machine body. The brush unit 44 is arranged above the rotation axis of the feeding roll 38 in the vertical direction, and is provided on the upper side of the feeding roll 38 in the rotating direction. The brush unit 44 has a brush 45 that is in sliding contact with the feeding roll 38, and a brush base portion 46 (corresponding to the base portion of the present invention) that supports the brush 45.

A pair of residual material discharge ports 47 are formed adjacent to the pair of feed rolls 38 on the side of the feed portion 32 where the hopper 31 is located with respect to the feed roll 38 in the vertical direction, and the residual material discharge port 47 is opened and closed. A possible discharge shutter 48 is provided. An opening / closing lever 49 (see FIGS. 3 and 5) capable of opening / closing the discharge shutter 48 is provided at the right end of the fertilizer application device 30 on the front side of the machine, and the discharge shutter 48 and the opening / closing lever 49 are linked. They are connected by a mechanism 55 (see FIG. 4). As a result, the discharge shutter 48 is configured to be swingable by operating the opening / closing lever 49. When the discharge shutter 48 is swung in the direction of opening the residual material discharge port 47, the powder or granular material stored in the hopper 31 is guided to the residual material discharge pipe 90 on the downstream side of the residual material discharge port 47. Will be done. The state of the fertilizer application device 30 at this time is the discharge state. When the discharge shutter 48 is swung in the direction of closing the residual material discharge port 47, the powder or granular material stored in the hopper 31 is guided to the feeding roll 38. The state of the fertilizer application device 30 at this time is the feeding state. That is, the opening / closing lever 49 is configured so that the state of the fertilizer applying device 30 can be switched between the above-mentioned feeding state and the discharging state. The residual material discharge pipe 90 will be described later.

[Roll unit]
As shown in FIGS. 7 to 11, the feeding roll 38 in the feeding portion 32 is configured to be detachable from the feeding portion 32. Specifically, as shown in FIGS. 7 and 8, the feeding roll 38 is detachably housed in the feeding portion 32 in a state of being mounted on the roll unit 80. The roll unit 80 is configured as an integrated module including a feeding roll 38, shaft members 81, 82 that rotatably support the feeding roll 38, and support bearings 83, 84, 85.

The feeding portion 32 is formed with storage locations 71 and 72 capable of accommodating the two feeding rolls 38 and 38, and is engaged with the support bearings 83, 84 and 85 to support the support bearings 83, 84 and 85 from below. Possible bearing recesses 73, 74, 75 are formed. The bearing recess 74 is located between the storage portion 71 and the storage portion 72. One end of the shaft member 81 in the longitudinal direction is integrally formed with the input gear 43. Further, an engaging portion 81a that engages with the shaft member 82 is formed at the other end of the shaft member 81 in the longitudinal direction, and engages with the engaging portion 81a at one end in the longitudinal direction of the shaft member 82 that faces the engaging portion 81a. A mating engaging portion 82a is formed. That is, the facing portion between the engaging portion 81a and the engaging portion 82a has a so-called in-row structure, and the engaging portion 81a of the shaft member 81 and the engaging portion 82a of the shaft member 82 engage with each other. As a result, the shaft member 81 and the shaft member 82 are integrally rotated on the same shaft core.

A hollow hole 38a is formed along the axial direction on the radial center side of the feeding roll 38, and an uneven groove extending linearly along the axial direction is formed on the inner peripheral surface of the hole 38a. ing. Similarly, uneven grooves 81c and 82c extending linearly along the axis direction are formed on the outer peripheral surfaces of the shaft member 81 and the shaft member 82, respectively. The concave-convex groove 81c and the concave-convex groove 82c each have the same groove shape, and the concave-convex groove on the inner peripheral surface of the hole 38a can be engaged with both the concave-convex groove 81c and the concave-convex groove 82c. ing. That is, the uneven groove 81c and the uneven groove 82c are splines, and the hole 38a is a spline hole. When the feeding roll 38 is fitted onto the shaft member 81 or the shaft member 82, the feeding roll 38 is spline-coupled to the shaft member 81 or the shaft member 82 and rotates integrally.

When two feeding rolls 38 and 38 are provided in the feeding portion 32, the feeding roll 38 is fitted on the shaft member 81 and the feeding roll 38 is fitted on the shaft member 82. When a single feeding roll 38 is provided in the feeding portion 32, the feeding roll 38 is fitted only on the shaft member 82, and the shaft member 81 is a shaft that only transmits a rotational force from the input gear 43 to the shaft member 82. Of course, the feeding roll 38 may be fitted only on the shaft member 81, and the shaft member 82 may be configured as a shaft that only supports the shaft member 81. That is, the roll unit 80 is configured so that a plurality of feeding rolls 38 can be mounted on the same shaft core.

As described above, depending on the configuration in which the shaft member 81 and the shaft member 82 can be integrally rotated and the configuration in which the feeding roll 38 is externally fitted to the shaft members 81 and 82, for example, the shaft member 81 or the shaft member 82 is fitted in the shaft core direction. It is possible to externally fit the feeding rolls 38 having different specifications having different widths, or to externally fit a plurality of feeding rolls 38 having a small width in the axial direction. Therefore, even when the fertilizer application device 30 has various specifications, the single-specification shaft members 81 and 82 can be used in common, and the configuration of the roll unit 80 can be simplified.

The shaft member 81 penetrates the support bearing 83, and a bearing fitting portion 81b formed in a perfect circle in the circumferential direction is formed at one end of the shaft member 81 in the longitudinal direction adjacent to the input gear 43 to fit the bearing. The joint portion 81b is supported by the support bearing 83. Further, the positions where the engaging portion 81a and the engaging portion 82a are located, that is, the engaging portions of the shaft member 81 and the shaft member 82 are supported by the support bearing 84 in a state of penetrating the support bearing 84. The shaft member 82 is inserted through the support bearing 85, and the bearing fitting portion 82b is formed in a circular shape in the circumferential direction at one end of the shaft member 82 in the longitudinal direction opposite to the side where the engaging portion 82a is located. Is formed, and the bearing fitting portion 82b is supported by the support bearing 85. As a result, the feeding roll 38 outerly fitted to the shaft member 81 is supported at both ends of the support bearing 83 and the support bearing 84, and the feeding roll 38 outerly fitted to the shaft member 82 is formed by the support bearing 84 and the support bearing 85. Supported at both ends. The support bearing 83 is slidable in the vertical direction with respect to the bearing recessed portion 73, the support bearing 84 is slidable in the vertical direction with respect to the bearing recessed portion 74, and the support bearing 85 is vertically slidable with respect to the bearing recessed portion 75. It can slide in the direction. As described above, the roll unit 80 is configured as an assembly type module.

As shown in FIGS. 7 to 11, a pair of locking portions 87, 87 are provided at locations located outside the feeding portion 32 in the support bearing 85, and the outer surface of the bearing recessing portion 75 in the feeding portion 32. A pair of non-locking portions 78, 78 are formed in the bearing. The pair of locking portions 87, 87 are urged in a direction in which they are separated from each other by a spring (not shown) provided between the locking portions 87, 87.

Of the pair of locking portions 87,87, the end portions on the opposite sides to the opposite sides have inclined surfaces that incline toward the upper side so as to be separated from each other. Therefore, for example, when the support bearing 85 slides downward and the inclined surface of the pair of locking portions 87, 87 comes into contact with the bearing recessed portion 75, the support bearing 85 is provided between the pair of locking portions 87, 87. The positions of the pair of locking portions 87, 87 are displaced in the direction of approaching each other against the urging force of the spring (not shown). When the vertical heights of the locking portions 87 and 87 and the vertical heights of the non-locking portions 78 and 78 match, the positions of the pair of locking portions 87 and 87 are separated from each other by the urging force of the spring. Displaced in the direction, the pair of locking portions 87,87 engage the pair of non-locking portions 78,78. As a result, the support bearing 85 is configured to be able to hold its position with respect to the bearing recess 75.

Each of the pair of locking portions 87 and 87 is formed in an L shape in a plan view, and the ends of the pair of locking portions 87 and 87 facing each other are in the axial direction of the axial core Y. Along the extension portion 32, the extension portion 32 extends outward. That is, the operator can pick up the extending portion with a finger and press the pair of locking portions 87, 87 in the direction of approaching each other. Therefore, when the operator presses the extending portion, the pair of locking portions 87,87 opposes the urging force of the spring (not shown) provided between the pair of locking portions 87, 87. The positions of are displaced in the direction of approaching each other, and the pair of locking portions 87, 87 are disengaged from the pair of non-locking portions 78, 78. As a result, the support bearing 83 is removable from the bearing recess 73, and the support bearing 85 is removable from the bearing recess 75.

Further, the pair of locking portions 87, 87 are provided on the support bearing 83 as well as the support bearing 85, and the non-locking portions 78, 78 are formed on the outer surface of the bearing recessed portion 73 in the feeding portion 32. .. With the support bearing 83 mounted on the bearing recess 73, the pair of locking portions 87,87 in the support bearing 83 engage with the pair of non-locking portions 78, 78 on the side where the bearing recess 73 is located. do. As a result, the support bearing 83 is configured to be able to hold its position with respect to the bearing recessed portion 73.

As shown in FIGS. 8 to 10, when the roll unit 80 and the brush unit 44 are mounted on the feeding section 32, first, the assembled roll unit 80 is mounted on the feeding section 32. At this time, the operator rolls the support bearing 83 so that the support bearing 83 is located in the bearing recessed portion 73, the support bearing 83 is located in the bearing recessed portion 74, and the support bearing 85 is located in the bearing recessed portion 75. The unit 80 is pressed toward the storage portions 71 and 72 of the feeding portion 32. At this time, the support bearing 83 slides downward with respect to the bearing recessed portion 73, the support bearing 84 slides downward with respect to the bearing recessed portion 74, and the support bearing 85 slides downward with respect to the bearing recessed portion 75. Slide to. A pair of locking portions 87, 87 in the support bearing 83 engage with a pair of non-locking portions 78, 78 on the side where the bearing recess 73 is located, and a pair of locking portions 87, in the support bearing 85. When the 87 engages with the pair of non-locking portions 78, 78 on the side where the bearing recess 75 is located, the mounting of the roll unit 80 is completed.

The storage locations 71 and 72 are configured so that the brush unit 44 can be stored adjacent to the outer peripheral surface of the feeding roll 38. When the two brush units 44 are slid and inserted downward with respect to the storage locations 71 and 72, the mounting of the two brush units 44 is completed. That is, the roll unit 80 equipped with the feeding roll 38 for feeding the powder or granular material from the hopper 31 by rotation and the brush unit 44 arranged side by side with the roll unit 80 are detachably stored in the feeding portion 32.

The support bearing 84 is located between the support bearing 83 and the support bearing 85, and serves as a wall that separates the storage portion 71 and the storage portion 72. As shown in FIGS. 7 to 10, the partition portions 88 and 89 of the support bearing 84 are provided along the axial direction of the axial core Y of the axial members 81 and 82 from the upper portion on the lower rotation side of the feeding roll 38. Postpone. The partition portions 88 and 89 are integrally formed with the support bearing 84. In the side view, the partition portions 88 and 89 are formed in an arc shape along the outer circumference of the feeding roll 38, and the end portions of the feeding roll 38 on the lower side of rotation are the lower portions of the residual material discharge ports 47, respectively. And continue. Therefore, when the pair of discharge shutters 48, 48 are swung in the direction of opening the residual material discharge ports 47, 47, the powder or granular material is guided from the partition portions 88, 89 to the residual material discharge ports 47, 47. NS.

As shown in FIG. 7, of the respective support bearings 83 and 85, the recesses 83a and 85a that allow the protruding tip portions of the respective partition portions 88 and 89 to enter the side portions on the side facing the support bearing 84. Is formed. The protruding tips of the respective partition portions 88 and 89 enter the recesses 83a and 85a. For this reason, the support bearing 84 is supported at both ends by the support bearings 83, 85, respectively, via the partition portions 88, 89. As a result, it is possible to prevent a portion of the support bearing 84 on the lower side in the rotation direction of the feeding roll 38 from being pushed up due to the rotation of the feeding roll 38. A locking claw may be formed at the protruding tip of each of the partition portions 88 and 89, and the partition portions 88 and 89 may be engaged with the recesses 83a and 85a in a snap-fit manner.

As shown in FIGS. 6, 8 to 10, the bulging portion 84a is formed on the side portion of the support bearing 84 facing the brush unit 44, that is, on the upper side in the rotation direction of the feeding roll 38, and bulges. The protruding portion 84a bulges from the side portion of the support bearing 84 to the side where the brush unit 44 is located. Further, the bulging portion 83b is formed on the side portion of the support bearing 83 facing the brush unit 44, and the bulging portion 85b is formed on the side portion of the support bearing 85 facing the brush unit 44. Has been done. Both the bulging portion 83b and the bulging portion 85b bulge from the side portions of the support bearings 83 and 85 to the side where the brush unit 44 is located.

Of the brush base portion 46 of the brush unit 44, bulging portions 46a are formed on both the left and right sides of the brush 45 and on the upper end side portion on the side facing the support bearings 83, 84, 85. In a plan view, the bulging portion 46a overlaps with the bulging portions 83b, 84a, 85b. The bulging portion 46a comes into contact with the bulging portions 83b, 84a, 85b in a state of being located above the bulging portions 83b, 84a, 85b. Of the brush base portion 46, two protrusions 46b, 46b that project upward from the upper end portion of the brush base portion 46 are formed at the upper end portion on the side opposite to the side facing the support bearings 83, 84, 85. ..

The protrusions 46b, 46b project outward from the side opposite to the side facing the support bearings 83, 84, 85, and the lower end surface of the protruding portion of the protrusion 46b and the front side of the machine body in the feeding portion 32. Abuts with the upper end surface. With the brush unit 44 attached to the feeding portion 32, the protruding upper end of the protruding portion 46b can come into contact with the shutter portion 69B of the opening / closing lid 69, and with the opening / closing lid 69 closed, the protruding portion 46b protrudes. The upper end is pressed by the opening / closing lid 69 so as not to be displaced. As a result, the position of the brush base portion 46 is maintained, and the possibility that the brush base portion 46 is pushed upward due to the rotation of the feeding roll 38 and the sliding contact between the feeding roll 38 and the brush 45 is preferably prevented. .. Further, since the bulging portion 84a of the support bearing 84 is located directly below the bulging portion 46a, the pushing force applied to the support bearing 84 is received by the bulging portion 46a. Therefore, it is possible to prevent a portion of the support bearing 84 on the upper side in the rotation direction of the feeding roll 38 from being pushed up due to the rotation of the feeding roll 38.

Further, the protrusions 46b, 46b are located above the bulges 83b, 84a, 85b in a state of overlapping the bulges 83b, 84a, 85b in a plan view. Therefore, the operator operates the pair of locking portions 87 and 87 of the support bearing 83 and the support bearing 85, respectively, to unlock the locking portion 87, and then slide the roll unit 80 upward. Then, the protrusion 46b is lifted by the bulges 83b, 84a, 85b, and the brush unit 44 comes off together with the roll unit 80.

As shown in FIG. 11, inclined grooves 73a, 74a, 74b, 75a are formed at the lower ends of the bearing recesses 73, 74, 75 where they engage with the support bearings 83, 84, 85. In FIG. 11, the feeding roll 38, which is externally fitted to the shaft member 81 and is located between the support bearing 83 and the support bearing 84, is used as the feeding roll 38A, and is externally fitted to the shaft member 82 to form the support bearing 84 and the support bearing. The feeding roll 38 located between the feeding roll 38 and 85 is referred to as a feeding roll 38B. Each of the inclined grooves 73a, 74a, 74b, 75a is located below the lower end position of the feeding roll 38. Each of the inclined groove 73a and the inclined groove 74a has an inclined surface that is inclined so as to approach the side where the feeding roll 38A is located toward the lower side. Further, each of the inclined groove 74b and the inclined groove 75a has an inclined surface that is inclined so as to approach the side where the feeding roll 38B is located toward the lower side. Therefore, even if the powder or granular material enters each of the inclined grooves 73a, 74a, 74b, 75a, the powder or granular material falls by its own weight along these inclined surfaces and is guided to the transport pipe 50 via the fertilizer application inlet 51b. Will be done.

[Residual material discharge route]
As shown in FIGS. 3 and 12, a tubular residual material discharge pipeline 90 is provided on the rear side of the machine body with respect to the feeding portion 32. The air duct 39 is configured so that it can communicate with the discharge port of the blower 36, and a switching valve portion 91 is provided adjacent to the discharge port of the blower 36. The switching valve portion 91 is configured so that the pipe line communicating with the blower 36 can be switched to either the air duct 39 or the residual material discharge line 90. The switching valve portion 91 is interlocked with the link mechanism 55 (see FIG. 4) and is configured to be swing-switchable by operating the on-off lever 49.

The residual material discharge pipe 90 is composed of a branch pipe on the downstream side in the discharge direction of the switching valve portion 91, a main discharge pipe 92, a first discharge pipe 93, and a second discharge pipe 94. .. The branch pipeline is a rigid pipeline integrally configured with the switching valve portion 91. A pair of first discharge pipes 93, 93 are located adjacent to the discharge direction downstream side of the pair of discharge shutters 48, 48 in the feeding portion 32. The second discharge pipe 94 extends to a place where the pair of first discharge pipes 93 and 93 merge and a place where the pair of first discharge pipes 93 and 93 join the main discharge pipe 92 further downstream in the discharge direction.

As shown in FIG. 12, in the present embodiment, a pair of residual material discharge ports 47, 47 are provided in the four feeding portions 32, and a pair of first discharge ports corresponding to the residual material discharge ports 47, 47 are provided. Pipelines 93 and 93 are provided. That is, the pair of first discharge pipes 93, 93 communicate with and connect the residual material discharge port 47 at the storage location 71 and the residual material discharge port 47 at the storage location 72, respectively. From this, a total of eight first discharge pipes 93 are provided, and four second discharge pipes 94 become the main discharge pipe 92 with the pair of first discharge pipes 93 and 93 merged. Join. At this time, the second discharge pipe 94 passes vertically through the gap between the pair of left and right first pipes 51, 51. Then, the second discharge pipe 94 communicates with the main discharge pipe 92 arranged below the pair of left and right first pipes 51, 51. In this way, the residual material discharge pipeline 90 is configured to communicate with and connect with a plurality of residual material discharge ports 47 on the upstream side of the discharge route and merge to form one pipeline on the downstream side of the discharge route. In the present embodiment, the blower 36 is provided on the left side of the machine body, the left side of the main body of the main discharge line 92 is the upstream side in the discharge direction, and the right side of the body of the main discharge line 92 is the downstream side in the discharge direction.

The main discharge pipe 92 includes a linear first pipe member 92A extending in the lateral direction of the machine body, a second pipe member 92B communicating with the switching valve portion 91 and the first pipe member 92A, and a second pipe member 92B. It has a third pipeline member 92C extending downward on the downstream side in the discharge direction from the one pipeline member 92A. The first pipeline member 92A is composed of a rigid pipeline. Since the path on the downstream side of the switching valve portion 91 in the discharge direction faces the rear of the machine body, the second pipeline member 92B is composed of an elastic pipeline. The second pipeline member 92B is curved so that the upstream side in the discharge direction of the second pipeline member 92B faces the rear of the machine body and the downstream side in the discharge direction of the second pipeline member 92B faces the lateral direction of the machine body. The branch pipeline on the downstream side in the discharge direction from the switching valve portion 91 is composed of a rigid pipeline, and the joint between the branch pipeline and the first pipeline member 92A is connected by the second pipeline member 92B. ..

Four through holes 92a, 92a, 92a, 92a are formed in the upper part of the main discharge pipe 92 for the downstream end of the second discharge pipe 94 to penetrate, and each of the second discharge pipe 94 The downstream end of the main discharge pipe 92 is inserted into the cylinder of the main discharge pipe 92. Of the second discharge pipe 94, the outer periphery of the portion inserted into the cylinder of the main discharge pipe 92 is in close contact with the through hole 92a, and the main discharge pipe 92 is prevented from leaking the conveyed air from the through hole 92a. And the second discharge pipe 94 is configured.

When the operator operates the opening / closing lever 49 to switch the state of the fertilizer application device 30 from the feeding state to the discharging state, each discharging shutter 48 is swung in the direction of opening the residual material discharging port 47. At the same time, the switching valve portion 91 is oscillated in the direction of communicating and connecting the residual material discharge pipe 90 with the blower 36. The first discharge pipe 93 and the second discharge pipe 94 are located on the lower side of the machine body toward the downstream side in the discharge direction. Therefore, when the residual material discharge port 47 is opened, the powder or granular material stored in the hopper 31 passes through the first discharge pipe 93 and the second discharge pipe 94 due to its own weight, and the main discharge pipe 92. Fall into. The powder or granular material that has fallen into the main discharge pipe 92 is pumped to the right side of the machine body, that is, the downstream side in the discharge direction by the transport wind of the blower 36, and is guided to the third pipe member 92C of the main discharge pipe 92. Then, the powder or granular material is discharged from the discharge port of the third pipeline member 92C, and the powder or granular material is collected in, for example, a bag prepared by the operator.

[Closed structure of feeding part]
In the eight-row planting type seedling planting apparatus W shown in the present embodiment, the powder or granular material is supplied to all of the eight transport pipelines 50 connected to the four feeding portions 32. However, for example, when the seedling planting device W has a seven-row planting type or the like, if the configuration of the feeding section 32 used in the pair of feeding rolls 38 is such that the storage points 71 and 72 in the feeding section 32 are conveyed. There are some that are not used for supplying powder or granular material without communicating with the pipeline 50. In such a case, the feeding roll 38 is not arranged at the storage portion 71 or the storage portion 72 that is not used for supplying the powder or granular material. However, there is a risk that the powder or granular material may enter the storage location 71 or the storage location 72, which is not used for supplying the powder or granular material, and the powder or granular material may not be supplied to the field surface of the field while the powder or granular material remains in the storage location 71 or the storage location 72. .. In order to avoid such inconvenience, a closed structure that closes the storage portion 71 or the storage portion 72 that is not used for supplying the powder or granular material is used.

As shown in FIG. 13, the closing structure for closing the storage portion 71 or the storage portion 72 includes the inclined guide plate 95, the first closing lid 96 (corresponding to the closing plate of the present invention), and the second closing lid 97. , A third block plate 98, and the like. In FIG. 13, since the storage portion 71 is not used for supplying the powder or granular material, the tilt guide plate 95 closes the opening of the hopper 31 on the side communicating with the storage portion 71. Provided at the bottom. The inclined guide plate 95 is inclined so as to approach the opening on the side communicating with the storage portion 72 toward the lower side, and the powder or granular material on the side where the storage portion 71 is located communicates with the storage portion 72 by the inclination of the inclined guide plate 95. You will be guided to the opening on the side of the surface.

The first closing lid 96 is provided at the upper end of the storage portion 71, and the second closing lid 97 is provided at the lower end of the storage portion 71. Further, a third block plate 98 is provided on the side portion of the storage portion 71 on the side where the support bearing 84 is provided. The first closing lid 96, the second closing lid 97, and the third closing plate 98 may be formed as an integral member. The first closing lid 96 and the second closing lid 97 close the upper and lower openings in the storage portion 71, and the third closing plate 98 closes the gap between the shaft members 81 and 82 and the support bearing 84. As a result, it is possible to preferably prevent powder or granular materials from entering the storage location 71. Further, even if the first pipeline 51 below the storage location 71 communicates with the blower 36 and the storage location 71 and the downstream side of the first pipeline 51 in the transport direction is closed, the second The closing lid 97 can reduce the backflow of the transport air to the storage location 71. Further, the first closing lid 96 and the third closing plate 98 can suitably prevent the transport air from flowing out from the storage portion 71 to the hopper 31 and the storage portion 72.

When the storage portion 72 is not used for supplying the powder or granular material, the inclined guide plate 95 closes the opening of the hopper 31 on the side communicating with the storage portion 72, and the powder or granular material on the side where the storage portion 72 is located is closed. , The structure may be such that the inclination of the inclination guide plate 95 guides the guide to the opening on the side communicating with the storage portion 71. In this case, the first closing lid 96 is provided at the upper end of the storage location 72, the second closing lid 97 is provided at the lower end of the storage location 72, and the third closing plate 98 is provided with the support bearing 84 of the storage locations 72. It is provided on the side of the bearing.

[Another Embodiment]
The present invention is not limited to the configurations exemplified in the above-described embodiments, and the following, typical alternative embodiments of the present invention will be exemplified.

(1) In the above-described embodiment, the feeding roll 38 is configured to be fitted on the shaft members 81 and 82, but is not limited to the above-described embodiment. For example, the feeding roll 38 and the shaft member 81 may be integrally formed, or the feeding roll 38 and the shaft member 82 may be integrally formed. In this case, of the two feeding rolls 38, the portions facing each other in the axial direction may have a so-called in-row structure.

(2) In the above-described embodiment, the brush unit 44 is held in position by the protruding upper end of the protrusion 46b being pressed non-displaceably by the opening / closing lid 69 in the working state. It is not limited to the form. For example, the feeding portion 32 may be provided with a locking claw capable of holding the position of the brush base portion 46, and the locking claw may hold the brush base portion 46 in a non-displaceable position.

(3) In the above-described embodiment, one feeding roll 38 is arranged at each of the storage locations 71 and 72, but the present invention is not limited to the above-described embodiment. For example, a plurality of feeding rolls 38 having a small width in the axial core direction may be arranged at the storage location 71 in a state of being connected to each other along the axial core direction. The same applies to the feeding roll 38 arranged at the storage location 71.

(4) In the above-described embodiment, the two brush units 44 are arranged side by side with the roll unit 80, but the present invention is not limited to the above-described embodiment. For example, a horizontally long brush base portion 46 extending over the storage portion 71 and the storage portion 72 may be provided, and one brush base portion 46 may be in contact with the roll unit 80 on the upper side of the roll unit 80. The bulging portion 46a extends in the longitudinal direction of the brush base portion 46, and in a plan view, the bulging portion 46a overlaps with the bulging portions 83b, 84a, 85b, and the bulging portion 46a overlaps with the bulging portions 83b, 84a, The configuration may be located above 85b.

(5) The above-described embodiment is not limited to rice transplanters, but can also be applied to direct sowing machines, vegetable transplanters, fertilizer and chemical sprayers in fields, and the like.

The present invention is applicable to field work machines.

30: Fertilizer application device (supply device)
31: Hopper 32: Feeding part 38: Feeding roll 38a: Hole part 44: Brush unit 45: Brush 46: Brush base part (base part)
50: Conveyance pipeline 71: Storage location 72: Storage location 80: Roll unit 81a: Engagement part 82a: Engagement part 95: Inclined guide plate 96: First block lid (block plate)

Claims (7)

The supply device for supplying the agricultural material to the field is provided with a hopper for storing the agricultural material and a feeding portion provided below the hopper and communicating with the hopper.
A roll unit equipped with a feeding roll for feeding the agricultural material from the hopper by rotation and a brush unit arranged side by side with the roll unit are detachably stored in the feeding portion.
The brush unit is provided with a brush that is in sliding contact with the outer peripheral surface of the feeding roll, and a base portion that supports the brush with its lower end positioned above the rotation axis of the feeding roll.
A field work machine in which the base portion abuts on the roll unit. The field work machine according to claim 1, wherein a hollow hole is formed on the shaft core side of the feeding roll, and the feeding roll is fitted onto a shaft member that engages with the hole. The field work machine according to claim 1 or 2, wherein the roll unit is configured so that a plurality of the feeding rolls can be mounted on the same shaft core. The field work machine according to claim 3, wherein the lower part of each of the feeding rolls is communicated with a transport route to a different planting line. The field work machine according to claim 3 or 4, wherein a plurality of the brush units can be mounted adjacent to the outer periphery of each of the feeding rolls. The field work machine according to any one of claims 3 to 5, wherein an engaging portion that rotatably engages with each other is formed at a portion facing each other of the pair of feeding rolls mounted on the roll unit. Among the roll units, a closing lid for closing the upper part of the roll unit is provided at a storage location where the feeding roll is not used so as not to communicate with the hopper.
3. The field work machine described.

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