JP7068877B2 - 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 the field.

For example, in Patent Document 1, a seedling planting device having a supply device for supplying agricultural materials to a field (fertilizer application machine 36 in the literature) and a seedling stand on which seedlings for planting are placed (seedling stand 16 in the literature). (The planting section 15 of the literature) and a rice transplanter equipped with the above are disclosed. A transport pipe (fertilizer application hose 44 in the literature) that guides agricultural materials to the field, a blower that supplies transport air to the transport pipeline (blower 41 in the literature), and a middle portion of the transport pipeline are used for transporting agricultural materials to this supply device. An air escape pipe (relief pipe 97, hose 98 in the literature) that branches in the direction opposite to the direction and can divert the conveyed air is provided, and the middle part of the air escape pipe is curved in a mountain shape. , The branch tip of the air escape pipeline is configured to face downward. As a result, when fertilizer clogging or the like occurs on the downstream side of the transport pipeline, the air flowing in the transport pipeline is configured to escape to the outside of the machine body via the air escape pipeline.

Japanese Unexamined Patent Publication No. 2000-060247

By the way, it is conceivable that the air that escapes from the air escape pipeline to the outside of the machine body contains powder particles of agricultural materials. Since the powder particles of such agricultural materials are vigorously discharged to the outside of the machine body by the transport wind, there is a possibility that they become dust and are scattered in the air around the machine body. In addition, such agricultural materials often have acidic chemical properties, and when the agricultural materials adhere to the surface of the metal, the metal is easily oxidized. In particular, in the rice transplanter in Patent Document 1, the air in the air escape pipeline is discharged from the vicinity of the middle portion of the transport pipeline, that is, the vicinity of the upper and lower intermediate positions of the seedling planting apparatus. Therefore, in the rice transplanter in Patent Document 1, there is a high possibility that the powder particles of the agricultural material will adhere to the frame of the seedling planting device after being scattered, which may cause rust on the seedling planting device. rice field. From this, there was room for improvement in the air escape pipeline from the viewpoint of the work environment and maintenance of the field work machine.

In view of the above-mentioned circumstances, an object of the present invention is to provide a field work machine that does not disperse powder particles of agricultural materials contained in the air flowing from the air escape pipeline to the outside of the machine body into the air around the machine body.

The field work machine according to the present invention
A supply device that supplies agricultural materials to the field,
It has a seedling stand on which seedlings for planting are placed, a plurality of planting arms that take out seedlings from the lower part of the seedling stand and plant them in the field , and a ground leveling float that follows the ground surface of the field at the lower part. Equipped with a seedling planting device,
The supply device includes a discharge unit that supplies the agricultural material to the field, a transport pipe that guides the agricultural material to the discharge unit, a blower that supplies transport air to the transport pipe, and the above . An air escape pipeline that branches from the transport pipeline in the direction opposite to the transport direction and is capable of splitting the transport air is provided.
The branch tip of the air escape pipeline is extended so as to be lower than the lower end of the seedling stand, and is arranged in front of the leveling float .

Since the air escape pipeline branches from the transport pipeline in the direction opposite to the transport direction, it is difficult for agricultural materials to flow into the air escape pipeline, but some of the agricultural materials that have become fine powder escape air. It flows into the pipeline. According to the present invention, since the branch tip of the air escape pipe has a height lower than the lower end of the seedling stand, the discharge port at the end of the air escape pipe in the discharge direction approaches the field. For this reason, most of the powder particles of agricultural materials flowing into the air escape pipeline are sprayed onto the field, and the risk of the powder particles of agricultural materials being scattered in the air is greatly reduced, and the working environment in the field work machine is improved. ..

In addition, since the powder particles of agricultural materials flowing into the air escape pipeline are guided to a height lower than the lower end of the seedling stand, for example, a branch tip of the air escape pipeline is provided near the upper and lower intermediate positions of the seedling planting device. Compared with the above configuration, the powder grains of agricultural materials are less likely to adhere to the frame of the seedling planting device or the like. This reduces the risk of rusting on the seedling planting device and improves maintainability in the field work machine. That is, the present invention realizes a field work machine that does not disperse the powder particles of agricultural materials contained in the air that escapes from the air escape pipeline to the outside of the machine body into the air around the machine body.
Further, according to the present invention, since the branch tip of the air escape pipeline is arranged in front of the leveling float, after the powder particles of the agricultural material flowing into the air escape pipeline are sprayed on the rice field surface of the field, It is pressed down from above by the leveling float. As a result, the possibility that the powder particles of the agricultural material enter the soil on the surface of the rice field and the powder particles of the agricultural material are scattered in the air is further reduced.

In the present invention
A plurality of the transport pipelines are provided for each planting arm.
It is preferable that the air escape pipe branching from each of the transport pipes is connected to a joint pipe to which a plurality of pipes can be connected.

According to this configuration, since a plurality of air escape pipes are combined into one pipe on the downstream side in the discharge direction, there is only one outlet for powder particles of agricultural materials flowing into the air escape pipe, and the air escape pipe is used. Maintenance at the tip of the road branch is facilitated.

Further, in the present invention,
It is preferable that the joint tube is supported by a guide member connected to the seedling planting device.

In this configuration, since the joint pipe is connected to the seedling planting device via a guide member, the joint pipe is supported by the seedling planting device with a simple configuration.

In the present invention
It is preferable that the branch base end of each of the air escape pipes in the plurality of transport pipes is inclined toward the side where the connection point of the joint pipe is located in the lateral direction of the machine body.

With this configuration, it becomes easy to form a straight line between the connection point of the joint pipe and the branch base end of the air escape pipe without bending it as much as possible, and the agricultural material that flows into the air escape pipe. The powder particles are smoothly discharged to the outside of the machine without staying in the air escape pipeline.

In the present invention
A grooving device is provided to form a groove on the surface of the field.
It is preferable that the branch tip portion is arranged in the vicinity of the groove making device.

According to this configuration, since the branch tip of the air escape pipeline is arranged near the groover, the powder particles of the agricultural material flowing into the air escape pipeline are discharged from the discharge portion of the transport pipeline. It will be easier to supply to the surface of the field together with. As a result, the supply device can more preferably supply agricultural materials to the field.

It is an overall side view of a rice transplanter. It is an overall plan view of a rice transplanter. It is a front view of the fertilizer application device. It is a side sectional view of the fertilizer application device. It is a rear view of the air escape pipeline. It is a side view of an air escape pipeline. It is a rear view which shows the other embodiment of the air escape pipeline.

[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 machine 1. Has been done. The seedling planting device W is movably connected to the rear end of the traveling machine body 1 via a link mechanism 5 that moves up and down by the expansion and contraction operation of the lifting hydraulic cylinder 4.

An openable / 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 machine body frame 1F extending in the front-rear direction, and a support support column frame 8 is erected at the front portion of the machine 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. A pair of rotary type 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 drives each rotary case 11 to rotate by the power transmitted from the transmission case 10 while driving the seedling stand 13 back and forth laterally, 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 a planting arm 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 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 portions of the left and right spare seedling frames 17 are connected to each other. It is connected at 18.

The traveling machine 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 and detects 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 preliminary 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 passengers 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 to be capable of switching forward / backward and changing 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 the passengers from the side of the aircraft are provided on both the left and right sides of the foot portion of the boarding section 20.

When the operation 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 descending position, the seedling planting device W descends and touches the ground surface to stop.

When starting the rice planting work, the passenger operates the operation lever 24 to lower the seedling planting device W and starts the 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 cut off 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 is applied 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 (discharge unit), a groove making device 35, a blower 36, and an electric drive motor 37. Has been done.

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. Grooves 35 form grooves in the vicinity of each planting strip on the field surface of the field. Eight fertilizer application / discharge units 34 are provided integrally with each groove-growing device 35, and eight transport pipelines 50 are communicated with each fertilizer application / discharge unit 34. The groove making device 35 and the fertilizer application / discharging unit 34 may be provided integrally, or the groove making device 35 and the fertilizer application / discharging unit 34 may be provided separately.

Each of the transport pipes 50 includes a first pipe 51 having rigidity, a second pipe 52 supported by the seedling planting device W and having rigidity, 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 the support frame 70 (FIGS. 5 and 6) 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 pipe line 53 is a flexible hose that connects the first pipe line 51 and the second pipe line 52 in communication with each other, and the seedling planting device W has a degree of curvature that can be freely deformed in response to an up-and-down movement. It has a simple structure. The first pipeline 51 is in a state along the horizontal direction in the side view of the airframe, and the second pipeline 52 inclines 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, 38 can be attached to the feeding portion 32 of a 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 are fertilized 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 conduit 51 is the air duct 39. It is inserted in the cylinder of. The through hole 39a and the air introduction port 51a are in close contact with each other over the entire circumference, and the first pipe line 51 and the air duct 39 are configured so that the conveyed air does not leak from the through hole 39a.

Each of the feeding rolls 38 is driven by a drive motor 37, and the powder or granular material stored in the hopper 31 is fed out by the rotation of each feeding roll 38, and the powder or granular material is fed to the fertilizer application inlet 51b of each first pipe line 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 pipe line 53 is inclined backward, the powder or granular material does not stay in the portion where the powder or granular material is inclined backward due to the transport air of the blower 36. 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 backward. A groove is formed in the vicinity of each planting strip on the rice field surface of the field 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 controlled to increase or decrease in cooperation with the position information, so that each position information can be controlled. It may be configured to adjust the amount of fertilizer applied.

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 gearbox 40, and the intermediate transmission 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. A compatible input gear (not shown) 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, and the respective feeding rolls 38 rotate.

[Air escape pipeline]
As shown in FIGS. 5 and 6, vertical support pipes 71 and 71 for supporting the seedling mounting table 13 are provided at both left and right ends of the seedling planting device W. The support frame 70 is supported by the vertical support pipes 71 and 71 on both sides of the seedling planting device W, and the second pipeline 52 is connected and fixed to the support frame 70, respectively. The second pipeline 52 is provided with an air escape pipeline 60 that branches from the transport pipeline 50 and is capable of dividing the transport air. The second pipeline 52 has a discharge port 52a that communicates with the fertilizer discharge unit 34 and a branch port 52b of the air escape pipeline 60. By allowing a part of the transport air to flow into the air escape pipe 60, the pressure of the transport air in the fertilizer application discharge unit 34 is adjusted so as not to become too high. As a result, the powder or granular material is suitably supplied to the groove on the rice field surface, and the possibility that the powder or granular material is scattered outside the groove on the rice field surface due to excessive pressure is reduced.

An air escape pipe line 60 capable of dividing the air conveyed from the blower 36 is connected to the branch port 52b. The branch port 52b branches from the transport line 50 in the direction opposite to the transport direction. Since the second pipeline 52 is inclined backward and downward in the side view, the respective branch openings 52b and the air escape pipeline 60 are inclined forward and upward in the side view. For this reason, the branch port 52b and the air escape pipe 60 are configured so that the powder or granular material conveyed to the fertilizer application discharge unit 34 in the transport pipe 50 is difficult to flow from the transport pipe 50 into the air escape pipe 60. Has been done.

In the air escape pipe 60, the end on the side opposite to the side communicating with the branch port 52b is connected to the joint pipe 62. Each air escape pipeline 60 communicates with one bundled pipeline 63 via a joint pipe 62. In the present embodiment, the two bundled pipes 63 and 63 are distributed to the left and right, and the four air escape pipes 60 on the right side of the machine are communicated with the bundled pipe 63 on the right side, and the bundled pipe 63 on the left side is connected. The four air escape pipelines 60 on the right side of the machine are connected to each other. That is, the branch tip portions of the respective air escape pipelines 60 are combined into one pipeline by the bundled pipeline 63.

The joint pipe 62 is formed in a T shape having two connection ports on the left and right and a connection port at the lower end, and six joint pipes 62 are arranged side by side along the lateral direction of the seedling planting device W. Has been done. The three joint pipes 62 on the right side of the fuselage are arranged together in a state corresponding to the four air escape pipes 60 on the right side of the fuselage, and the three joint pipes 62 on the left side of the fuselage are the four air escape pipes on the left side of the fuselage. They are arranged together in a state corresponding to the road 60. When the seedling planting device W is of the four-row planting type, the three joint pipes 62 may be arranged together in the left and right center portions of the seedling planting device W.

Of the three joint pipes 62 arranged together on the left and right sides of the machine, the connection port at the lower end of the joint pipe 62 in the center of the left and right is connected to the bundled pipe line 63. Of the two left and right connection ports of the two joint pipes 62 and 62 on the left and right ends, the connection port on the side facing the joint tube 62 in the center of the left and right and the connection ports on both the left and right sides of the joint tube 62 in the center of the left and right are It is connected via the connection line 65. That is, the connection pipeline 65 communicates and connects the opposing connection ports of the two adjacent joint pipes 62. Air escape pipes 60, 60, 60, 60 are connected to the two joint pipes 62, 62 at both left and right ends, respectively. Specifically, among the connection ports of the joint pipe 62, the connection port at the lower end and the connection port on the side opposite to the side facing the joint pipe 62 in the center of the left and right are used as the connection port of the air escape pipe line 60. .. The number of air escape pipes 60 to which the joint pipe 62 can be connected can be appropriately changed, and the number of connection ports of the joint pipe 62 can also be changed as appropriate. Further, the portion of the connection port of the joint pipe 62 that is not connected to the pipeline can be closed with a plug.

The branch base ends of the air escape pipes 60 in the plurality of transport pipes 50 are inclined toward the side where the connection point of the joint pipe 62 is located in the lateral direction of the machine body. That is, the branch port 52b of each second pipe line 52 is inclined to the left and right toward the side where the connection port of the joint pipe 62 is located. As a result, the air escape pipe 60 in the portion extending between the branch port 52b and the connection port of the joint pipe 62 becomes a pipe line formed as linearly as possible. As a result, the minute powder particles flowing into the air escape pipe 60 are discharged to the outside of the machine body without staying in the pipe of the air escape pipe 60.

Of the collective pipeline 63, the lower end portion 63a on the side opposite to the side connected to the connection port at the lower end of the joint pipe 62 in the center of the left and right is opened so as to face the lower rice field surface. The vicinity of the lower end portion 63a is held in position by the lower end guide member 66 made of a metal wire. A lower frame 72 that is supported by both sides at the lower ends of the vertical support pipes 71 and 71 is provided at the lower part of the seedling planting device W. The lower frame 72 is located below the lower end of the seedling mounting table 13 and extends to the left and right of the seedling planting device W. Further, the front end portion of the lower frame 72 is located in front of the machine body with respect to the front end portion of the leveling float 12. The lower end guide member 66 is bolted to the upper side surface of the lower frame 72, and the upper portion of the lower end guide member 66 is formed in a spiral shape. The upper portion of the lower end guide member 66 having a spiral shape externally supports a portion of the bundled pipeline 63 near the lower end portion 63a, and the lower end portion 63a extends to the vicinity of the front lower end of the lower frame 72. That is, the branch tip portion of the air escape pipeline 60, that is, the lower end portion 63a, is located in front of the machine body of the leveling float 12 and is extended so as to be lower than the lower end of the seedling loading platform 13.

Due to the above-described configuration of the bundled pipe 63, even if a part of the powder or granular material flows from the transport pipe 50 into the air escape pipe 60, it is discharged from the lower end of the bundled pipe 63 to the field surface of the field, and the bundled pipe 63 is discharged. It is pressed against the surface of the rice field by the ground leveling float 12 on the rear side of the lower end of the pipe. As a result, the possibility that the powder or granular material that has flowed into the air escape pipe 60 is discharged into the air and becomes dust is reduced. Further, if the powder or granular material that has flowed into the air escape pipeline 60 is discharged to the periphery of the seedling planting device W and then adheres to the seedling planting device W, the seedling planting device W may rust. If it is configured, the powder or granular material is discharged to the rice field surface of the field, so that the risk of rusting of the seedling planting device W is reduced.

The air escape pipe 60, the joint pipe 62, and the connection pipe 65 are supported by a guide member 64 connected to the support frame 70 of the seedling planting device W. The guide member 64 is composed of a metal wire and has a lower end support portion welded and fixed to the support frame 70 and a spiral portion formed in a spiral shape and capable of externally fitting and supporting the joint pipe 62. With the spiral shape of the spiral portion along the lateral direction of the machine body, the spiral portion externally supports any one of the air escape pipe line 60, the joint pipe 62, and the connection pipe line 65. The guide member 64 is erected from the support frame 70 in an upward direction, and the joint pipe 62 is supported by the guide member 64 above the support frame 70. Further, since each connection port in each joint pipe 62 is located above the branch port 52b of each second pipe line 52, the air escape pipe line 60 in the meantime is inclined forward in a side view. .. As a result, the powder or granular material transported to the fertilizer application / discharging unit 34 in the transport pipe 50 is less likely to flow from the transport pipe 50 into the air escape pipe 60.

[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 air escape pipeline 60 has a configuration in which the fourth pipeline 61 connected to each branch port 52b is bundled into one bundled pipeline 63 via the joint pipe 62. However, the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 7, each fourth pipeline 61 connected to each branch port 52b may be configured to extend to the vicinity of the rice field surface. Even in this case, the discharge port of the fourth pipeline 61 is located in front of the leveling float 12, and the powder or granular material discharged from the discharge port of the fourth pipeline 61 is pressed against the leveling float 12. Is also good. Of course, the discharge port of the fourth pipeline 61 may be provided in the vicinity of the groove making device 35.

(2) In the above-described embodiment, the lower end of the summarizing pipeline 63 is located on the front side of the ground leveling float 12, but the lower end of the summarizing pipeline 63 is located on the rear side of the leveling float 12. It may be a positional configuration. In this case, the lower end portion of the bundled pipeline 63 may be arranged in the vicinity of the groove making device 35. With this configuration, the fine powder or granular material flowing into the air escape pipe 60 can be easily supplied to the field together with the powder or granular material discharged from the fertilizer application discharge unit 34.

(3) In the above-described embodiment, the air escape pipeline 60 is configured to be provided in the seedling planting device W, but is not limited to the above-mentioned embodiment. For example, the branch port 52b may be provided in the first pipe line 51 or the third pipe line 53, and the air escape pipe line 60 is supported by the machine frame 1F, and the feeding portion 32 or the first pipe line is supported. The configuration may be provided directly below the 51.

(4) In the above-described embodiment, the branch base ends of the air escape pipes 60 in the plurality of transport pipes 50 are inclined toward the side where the connection point of the joint pipe 62 is located in the lateral direction of the machine body. , Not limited to the embodiments described above. For example, the branch base end of each of the air escape pipes 60 in the plurality of transport pipes 50 may be configured to face directly upward. With this configuration, it becomes more difficult for minute powder particles to flow into the air escape pipe 60.

(5) In the above-described embodiment, three joint pipes 62, 62, 62 are arranged on each of the left and right sides of the machine, and the three joint pipes 62 are connected by two connection pipes 65. It is not limited to the above-described embodiment. For example, the three joint pipes 62 and the two connection pipes 65 may be integrally configured to form one joint pipe 62.

(6) 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.

12: Ground leveling float 13: Seedling stand 15: Planting arm 30: Fertilizer application device (supply device)
34: Fertilization discharge part (discharge part)
35: Grooving device 36: Blower 50: Conveyance pipe 60: Air escape pipe 62: Joint pipe 63: Collective pipe (one pipe)
64: Guide member W: Seedling planting device

Claims (5)

A supply device that supplies agricultural materials to the field,
It has a seedling stand on which seedlings for planting are placed, a plurality of planting arms that take out seedlings from the lower part of the seedling stand and plant them in the field, and a ground leveling float that follows the ground surface of the field at the lower part. Equipped with a seedling planting device,
From the supply device, a discharge section that supplies the agricultural material to the field, a transport pipeline that guides the agricultural material to the discharge section, a blower that supplies transport air to the transport pipeline, and the transport pipeline. An air escape pipe that branches in the direction opposite to the transport direction and is capable of splitting the transport air is provided.
A field work machine in which the branch tip of the air escape pipeline is extended so as to be lower than the lower end of the seedling stand and is arranged in front of the leveling float. A plurality of the transport pipelines are provided for each planting arm.
The field work machine according to claim 1 , wherein the air escape pipe branching from each of the transport pipes is connected to a joint pipe to which a plurality of pipes can be connected. The field work machine according to claim 2 , wherein the joint pipe is supported by a guide member connected to the seedling planting device. The field work according to claim 2 or 3 , wherein the branch base end of each of the air escape pipes in the plurality of transport pipes is inclined toward the side where the connection point of the joint pipe is located in the lateral direction of the machine body. Machine. A grooving device is provided to form a groove on the surface of the field.
The field work machine according to any one of claims 1 to 4 , wherein the branch tip portion is arranged in the vicinity of the groove making device.

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