JP2020141612A - Paddy work machine - Google Patents

Abstract

To facilitate maintenance work of a supply duct and a discharging duct and also a feeding-out unit in a paddy work machine with a granule supply device.SOLUTION: A granule supply device 15 includes multiple feeding-out units 37 for feeding granule downward, multiple guidance hoses 40 for guiding the granule, a blower for supplying conveyance air, a supply duct 43 positioned below a reservoir and supplying the conveyance air to the multiple guidance hoses from the blower, and a discharging duct 44 for discharging the granule remaining in the supply duct 43 by the blowing air from the blower. The granule supply device 15 includes a position holding mechanism capable of holding a position in each of a working position for supplying the granule, a first position exposed while the discharging duct faces outside, and a second position while the discharging duct and the supply duct face the outside.SELECTED DRAWING: Figure 5

Description

The present invention relates to a paddy field working machine provided with a powder or granular material supply device for supplying powder or granular material such as agricultural fertilizer, chemicals and seeds to a field, such as a riding type rice transplanter or a riding type direct sowing machine. ..

The powder or granular material supply device includes a storage unit for storing powder or granular material, a feeding unit for feeding out powder or granular material from the storage unit, a guide hose for guiding the fed out powder or granular material to the field, and a guide hose via a supply duct. Is equipped with a blower or the like that blows the powder or granular material transport air. Further, as a duct for blowing air by the blower, in addition to the supply duct, a discharge duct for discharging the powder or granular material remaining in the supply duct after the work is completed by using the blower air is provided. Then, conventionally, the storage portion is separated from the feeding portion by rotating around the horizontal axis so as to be inclined about 40 to 45 degrees from the working position connected to the feeding portion, and the upper part is separated from the feeding portion. Some were configured to be switchable to open non-working positions (see, for example, Patent Document 1).

JP-A-2018-59

In the above-mentioned conventional configuration, when the storage portion is switched to the non-working position, the upper part of the feeding portion is opened, so that maintenance work such as cleaning the inside of the feeding portion can be easily performed. However, the supply duct and the discharge duct remain as they are on the lower side of the feeding part. Of these, the fertilizer in the discharge duct can be discharged using the wind of the blower, but since the supply duct is located on the lower side of the feeding part, it is difficult to perform maintenance work.

Therefore, in a paddy field working machine equipped with a powder or granular material supply device, it has been desired to facilitate maintenance work not only on the feeding portion and the discharging duct but also on the supply duct.

The characteristic configuration of the paddy field working machine according to the present invention is that the powder or granular material supply device for supplying powder or granular material to the field is rotatably supported by a fixed frame on the machine body side around the horizontal axis, and the powder or granular material is supplied. The device includes a storage unit for storing granular materials, a plurality of feeding units for feeding out the granular materials stored in the storage unit downward, and a plurality of guide hoses for guiding the fed out powder or granular material to a supply target location. The blower that supplies the transport air to the guide hose, the supply duct that is located below the storage portion and supplies the transport air from the blower to the plurality of guide hoses, and the powder or granular material that remains in the supply duct are described. A discharge duct for discharging by blowing air from a blower is provided, and the powder or granular material supply device is rotated in a predetermined direction from a work position for supplying powder or granular material and the work position around the horizontal axis to discharge the powder or granular material. The first position where the duct is exposed in a state of facing outward, the first position where the discharge duct and the supply duct are exposed in a state of facing outward by rotating in a predetermined direction around the horizontal axis from the first position. The point is that a position holding mechanism that can hold the position at each of the two positions is provided.

According to the present invention, when the powder or granular material supply device is switched to the first position, cleaning and other maintenance work of the discharge duct can be easily performed. Further, in the first position, since the powder or granular material supply device rotates in a predetermined direction around the horizontal axis from the working position, not only the discharge duct but also the lower side of the storage portion is opened, so that the storage portion and the feeding portion are fed out. If the portion is configured to be separable, maintenance work inside the feeding portion can be easily performed.

Further, when the powder or granular material supply device is switched to the second position, not only the discharge duct but also the supply duct is exposed in a state of facing outward. As a result, maintenance work for each of the discharge duct and the supply duct can be easily performed. Moreover, since the second position rotates even more than the first position, the lower side of the storage portion is greatly opened, and not only the discharge duct and the supply duct but also the maintenance work inside the feeding portion is performed. It will be easier to do.

When it is rotated to the second position greatly, the powder or granular material supply device, which is a large device, rotates greatly, which may increase the labor burden. Therefore, for simple cleaning work, temporary inspection during operation, etc., it is possible to handle the work at the first position. In this way, by using the first position and the second position properly according to the content of the maintenance work, the maintenance work can be easily performed.

Therefore, according to the present invention, in a paddy field working machine equipped with a powder or granular material supply device, it is possible to facilitate maintenance work not only on the feeding portion and the discharge duct but also on the supply duct.

In the present invention, it is preferable that the guide hose can be separated from the feeding portion as the powder or granular material supply device changes its posture from the working position to the first position or the second position. ..

According to this configuration, since the guide hose can be attached to and detached from the feeding portion as the posture of the powder or granular material supply device is changed, troublesome work such as removing the guide hose from the feeding portion in advance becomes unnecessary. Maintenance work will be easier.

In the present invention, as the powder or granular material supply device changes its posture from the working position to the first position or the second position, the discharging tool connecting the feeding portion and the discharging duct is the feeding portion. It is preferable that it is removable from.

According to this configuration, since the discharge tool can be attached to and detached from the feeding portion as the posture of the powder or granular material supply device is changed, troublesome work such as removing the discharging tool from the feeding portion in advance becomes unnecessary. Maintenance work will be easier.

In the present invention, when the powder or granular material supply device swings around the horizontal axis and is tilted from the working position to the first position, the discharge tool that connects the feeding portion and the discharge duct is described. It is preferable that the guide hose located in front of the machine and detachable from the feeding portion with respect to the feeding portion and tilted to the second position, the guide hose located behind the machine from the feeding portion is detachable from the feeding portion. Is.

According to this configuration, when the posture of the powder or granular material supply device is changed from the working position to the first position, the discharge duct can be removed by removing the discharge tool from the feeding portion. At this time, since the ejecting tool is located in front of the machine body from the feeding portion, the attachment / detachment work can be easily performed from the front side of the machine body. Further, when the posture of the powder or granular material supply device is changed to the second position, the guide hose can be removed from the feeding portion. At this time, since the guide hose is located behind the machine body from the feeding portion, the attachment / detachment work can be easily performed from the rear side of the machine body.

In the present invention, the second position is preferably a position where the supply port from the supply duct to the guide hose faces the field.

According to this configuration, the supply port faces the field with the guide hose removed. That is, since the supply port faces downward, the powder or granular material remaining in the supply duct is dropped and discharged to the outside as it is, so that the cleaning work is less troublesome.

In the present invention, it is preferable that a duct holder for integrally holding the discharge duct and the supply duct is provided.

According to this configuration, since the discharge duct and the supply duct are integrally held by the duct holder, the discharge duct and the supply duct can be removed at the same time in the maintenance work, and when they are removed separately. Work can be done more efficiently than in comparison.

In the present invention, the position holding mechanism includes the first position and the second position by engaging the posture holder on the machine body side with a single locked member on the powder or granular material supply device side. It is preferable that the position can be maintained in each of the above.

According to this configuration, the position is held by using a single locked member at each of the first position and the second position. Therefore, the position holding mechanism is configured by also using the member. Can be simplified.

In the present invention, the posture holder is supported on the seat support frame on the machine body side so as to be able to change the posture between a non-acting state of retreating to the machine body side and an acting state of projecting to the powder or granular material supply device. Is suitable.

According to this configuration, the posture holder can be firmly and stably supported by using the seat support frame having high strength.

It is an overall side view of a passenger-type rice transplanter. It is an overall plan view of a passenger-type rice transplanter. It is a rear view of the fertilizer application device. It is a front view of the fertilizer application device. It is a side view of the fertilizer application device. It is a perspective view which shows the rear part of a step support frame and a fertilizer application frame. It is a top view which shows the relationship between the ventilation path of a fertilizer application device, and a car body. It is a top view which shows the 2nd support part. It is a perspective view which shows the 2nd support part. It is a figure which shows the operation structure of the fertilizer application number switching clutch. It is an exploded perspective view which shows the mounting structure of the member of the all-row stop mechanism. It is a side view of the fertilizer application device when it is in the first position. It is a side view of the fertilizer application device when it is in a second position. It is a partial longitudinal side view of a fertilizer application device with a duct holder attached. It is a partial cross-sectional plan view of a fertilizer application device with a duct holder attached. It is a side view of the fertilizer application device when it is in the first position of another embodiment. It is a side view of the fertilizer application device when it is in the second position of another embodiment.

Hereinafter, as an example of an embodiment for carrying out the present invention, an embodiment in which the present invention is applied to a passenger-type rice transplanter, which is an example of a paddy field working machine, will be described with reference to the drawings.

In the present embodiment, in the following description, the direction of the arrow F shown in FIGS. 1, 2, 5, 12, 13, 16, 16 and 17 is defined as "front" and the direction of arrow B is defined as "rear". , The direction of the arrow L shown in FIGS. 2, 3 and 4 is "left", and the direction of the arrow R is "right". Further, the direction of the arrow U shown in FIGS. 1, 3, 4, 5, 5, 12, 13, 16, and 17 is defined as "up", and the direction of arrow D is defined as "down".

〔overall structure〕
The overall configuration of a passenger-type rice transplanter will be described.
As shown in FIG. 1, a link mechanism 4 that can swing up and down is provided at the rear portion of the traveling vehicle body 3 supported by the right and left front wheels 1 and the right and left rear wheels 2, and the rear portion of the link mechanism 4. A four-row planting type seedling planting device 5 is supported so as to be able to move up and down, and a hydraulic cylinder 6 for raising and lowering the link mechanism 4 is provided to form a riding type rice transplanter which is an example of a paddy field working machine.

The traveling vehicle body 3 is provided with right and left airframe frames 7 extending in the front-rear direction. The mission case 8 is connected to the front portion of the fuselage frame 7, and the engine 9 is supported by the front portion of the mission case 8. A boarding operation unit 10 is provided on the rear side of the traveling vehicle body 3. As shown in FIG. 2, the boarding operation unit 10 includes a steering handle 11 for steering the front wheels, a boarding step 12, a driver's seat 13, a rear step 14, and the like. A fertilizer application device 15 is provided on the rear side of the boarding operation unit 10.

As shown in FIGS. 5 and 6, a step support frame 16 that supports the boarding step 12 and the rear step 14 while being supported by the airframe frame 7 is provided. The step support frame 16 is made of a pipe material, extends in the front-rear direction along the left and right side portions of the boarding step 12, and is provided in a substantially loop shape by connecting the rear side portions. The step support frame 16 extends upward on the lateral side of the boarding operation unit 10 and supports the rear step 14 from below. Further, the rear portion of the step support frame 16 has a width longer than the distance between the left and right rear wheels 2, and includes a cover portion 17 (see FIG. 1) that also serves as a rear wheel fender. As shown in FIG. 6, connecting members 18 having a substantially U-shaped cross section are provided on both left and right sides at the rear end portion of the step support frame 16, and the lateral frame body 19 on the rear side is connected across the left and right connecting members 18. There is. The sideways frame body 19 is received and supported by the upper ends of the left and right body frames 7.

As shown in FIG. 6, the rear portions of the left and right fuselage frames 7 are formed wide in the vertical direction, and the left and right support members 20 extend from the upper end portions to the front and upper portions. The seat support frame 21 on the front side that supports the front side of the driver's seat 13 is erected and connected across the front ends of the left and right support members 20. A seat support frame 22 on the rear side having a substantially U shape is erected and connected across the base ends of the left and right support members 20 to support the rear side of the driver's seat 13.

As shown in FIG. 1, the power from the engine 9 is transmitted to the hydrostatic continuously variable transmission 24 provided as the main transmission via a belt tension type main clutch 23 or the like. Then, the power after shifting by the hydrostatic continuously variable transmission 24 is branched into a first power and a second power inside the transmission case 8. The first power is transmitted to a gear-type auxiliary transmission (not shown) built in the mission case 8. Then, the first power after shifting by the auxiliary transmission is branched into traveling and fertilizing inside the transmission case 8. The running power is transmitted to the left and right front wheels 1 via the front wheel transmission system (not shown), and is transmitted to the left and right rear wheels 2 via the rear wheel transmission system (not shown). The power for fertilization is transmitted to the fertilizer application device 15 via a fertilizer application clutch (not shown) built in the mission case 8. The second power is transmitted to the seedling planting device 5 via a gear type inter-stock transmission (not shown), a planting clutch (not shown) and a PTO shaft 25 built in the mission case 8.

[Seedling planting device]
As shown in FIGS. 1 and 2, the seedling planting device 5 has a power distribution mechanism 26 for transmitting power from the PTO shaft 25 and distributing and supplying the power to each part, two planting transmission cases 27, and planting. The planting mechanism 28 provided on the right and left sides of the rear part of the transmission case 27, the ground leveling float 29 for leveling the rice field, the seedling stand 30 on which the mat-shaped seedlings for planting are placed, and the like are provided. .. The planting mechanism 28 includes a rotating case 31 and a pair of planting arms 32 and the like provided at both ends of the rotating case 31.

Although not shown, the seedling planting device 5 drives a lateral feed mechanism for reciprocating the seedling loading platform 30 in the left-right direction with a constant stroke, and a vertical feed belt 33 provided on the seedling loading platform 30. A vertical feed mechanism is provided, and the power distribution mechanism 26 distributes and supplies the power from the traveling vehicle body 3 to each planting mechanism 28, the horizontal feed mechanism, and the vertical feed mechanism. Each planting mechanism 28 cuts a predetermined amount of planted seedlings from the lower end of the mat-shaped seedlings that reciprocate in the left-right direction together with the seedling stand 30 by the power from the power distribution mechanism 26, and after leveling with the ground leveling float 29. Plant in the mud area of the field. Each vertical feed mechanism vertically feeds the corresponding mat-shaped seedlings toward the lower end of the seedling stand 30 at a predetermined pitch by the power from the power distribution mechanism 26 each time the seedling stand 30 reaches the left and right stroke ends. .. By these operations, the seedling planting device 5 is configured for 4 rows capable of planting up to 4 rows of seedlings.

[Fertilizer application device]
Next, the fertilizer application device 15 will be described.
As shown in FIGS. 1 to 5, the fertilizer application device 15 includes a fertilizer frame 35 that supports the entire fertilizer application device, a hopper 36 as a storage unit for storing fertilizer as an example of powder or granular material, and a hopper for storing fertilizer. A feeding mechanism 37 as a left and right feeding part to be fed from the lower part of the 36, a left-right drive shaft 38 extending over the left and right feeding mechanisms 37, a feeding amount adjusting mechanism 39 for collectively adjusting the fertilizer feeding amount by the left and right feeding mechanisms 37, Located below the four guide hoses 40 that guide the fertilizer to the field, the four groovers 41 that form grooves for fertilizer application in the field, the blower 42 that supplies the transport air to the guide hose 40, and the hopper 36. A supply duct 43 for supplying transport air from the blower 42 to the plurality of guide hoses 40, a discharge duct 44 for discharging fertilizer remaining in the supply duct 43 by blowing air from the blower 42, and the like are provided. Although not described in detail, the feeding amount adjusting mechanism 39 can change the feeding rotation amount (corresponding to the feeding amount) of the drive shaft 38 by operating the handle.

The fertilizer application frame 35 will be described.
As shown in FIG. 6, the fertilizer application frame 35 is located on the rear side of the feeding mechanism 37 and extends long in the left-right direction, and the rear side frame body 45 is located on the front side of the feeding mechanism 37 and extends long in the left-right direction. The frame body 46 includes a plurality of front and rear connecting bodies 47 that connect the rear side frame body 45 and the front side frame body 46 at appropriate positions in the left-right direction. The fertilizer application frame 35 is supported by the rear end portion of the body frame 7.

Left and right first support portions B1 extending from the machine frame 7 to support the fertilizer application device 15 from below, and second support portions B2 extending rearward from the seat support frame 22 on the rear side to support the fertilizer application device 15 from the front. And are provided.

The left and right first support portions B1 include a support arm 48 made of a round pipe steel material, a first connecting member 49 connected to the machine body frame 7, a second connecting member 50 connected to the fertilizer application frame 35, and the like. Each support arm 48 is curved in a substantially U shape when viewed from the side. The left and right first connecting members 49 are formed in a substantially U shape in a laterally opened state, and are welded to the support arm 48. Each of the first connecting members 49 is bolted in a state of being fitted into a connecting member 18 formed in a substantially U shape in the airframe frame 7. The left and right second connecting members 50 are formed in a substantially U shape with an upward opening state, and are welded to the support arm 48.

As shown in FIG. 3, the left and right support arms 48 are moved to the right side of the fertilizer application device 15 side so that the connection point on the fertilizer application device 15 side is closer to the right side with respect to the connection point with respect to the machine frame 7. It has a shape that curves toward it. As a result, the left and right center positions of the attachment positions of the left and right support arms 48 with respect to the fertilizer application device 15 are arranged closer to the right end portion with respect to the left and right center positions of the fertilizer application frame 35. As a result, the position close to the feeding amount adjusting mechanism 39 can be supported, unnecessary vibration is suppressed, and the accuracy of adjusting the feeding amount is improved.

As shown in FIGS. 8 and 9, the rear end portion of the second support portion B2 is bolt-connected to the front side frame body 46 of the fertilizer application frame 35, and the left and right front-rear direction connecting portions 52 extending in the front-rear direction and the left and right The front-rear connecting portion 52 is integrally connected and includes a lateral connecting portion 53 extending in the left-right direction, and a front connecting portion 54 integrally connected to the lateral connecting portion 53 and extending forward. The front connecting portion 54 is formed in a substantially U shape when viewed from the front, and has vertical surface portions 54A on both left and right sides and a horizontal surface portion 54B extending over them.

The horizontal surface portion 54B of the front connecting portion 54 and the seat support frame 22 on the rear side are connected by using a bolt 55 with a handle. By manually operating the bolt 55 with the handle, it is possible to easily connect and disconnect the horizontal surface portion 54B of the front connecting portion 54 and the seat support frame 22 on the rear side. The left and right front-rear connecting portions 52 of the second support portion B2 are bent so as to be located on the right side as they are located on the front side in a plan view.

Next, the configuration of each part of the fertilizer application device 15 will be described.
As shown in FIGS. 2, 3 and 7, two feeding mechanisms 37 are arranged at the rear portion of the machine body along the left-right direction. A hopper 36 is provided over the upper part of the two feeding mechanisms 37. An electric blower 42 is provided on the left lateral side of the fertilizer application device 15. A suction duct 57 is connected to the blower 42, and the suction duct 57 extends close to the engine 9 under the boarding operation unit 10.

As shown in FIG. 7, a supply duct 43 is connected to the blower 42, and the supply duct 43 is provided so as to extend in the left-right direction from the left lateral side portion of the fertilizer application device 15 to the right lateral side portion. .. The supply duct 43 is connected to the lower part of the two feeding mechanisms 37. A pair of guide hoses 40 are connected to the lower part of each feeding mechanism 37, and each guide hose 40 is connected to a trenching device 41 provided adjacent to each planting line on the leveling float 29. There is. Therefore, four guide hoses 40 are connected to the feeding mechanism 37 and the groove making device 41.

In the planting operation state, air is sucked into the blower 42 through the suction duct 57 by the suction action of the blower 42, and the transport air of the blower 42 is supplied to the feeding mechanism 37 through the supply duct 43. At this time, the discharge duct 44 is closed by the lid to prevent the conveyed air from leaking to the outside from the discharge duct 44. When the feeding mechanism 37 is driven, a predetermined amount of fertilizer is fed from the hopper 36, and the fertilizer is supplied to the groove making device 41 through the guide hose 40 by the transport wind of the blower 42, and is formed on the field surface by the groove making device 41. Fertilizer is supplied to the groove made through the groove making device 41.

If fertilizer remains inside the hopper 36 or the feeding mechanism 37 after the planting work is completed, the remaining fertilizer is discharged to the outside through the discharge duct 44 by blowing air from the blower 42. Can be collected. The discharge tool 58 is provided so as to be connected from the front portion of the feeding mechanism 37 to the inside of the discharge duct 44 (see FIG. 14). The inside of the discharge tool 58 is provided with a shutter (not shown) that can be switched between an open state in which the inside of the feeding mechanism 37 and the inside of the discharge tool 58 are continuously connected and a closed state in which the connection is cut off. .. In the planting work state, the shutter is switched to the closed state. When discharging the residual fertilizer, the shutter is switched to the open state, the lid of the discharge duct 44 is removed, and the fertilizer is discharged from the tip of the discharge duct 44 to the outside by blowing air from the blower 42. At this time, the residual fertilizer can be recovered using a recovery container (not shown).

The two feeding mechanisms 37 are configured to be switchable between an operating state and an operating stopped state, respectively. To add a description, the fertilizer application device 15 is provided with a left-right drive shaft 38 extending over the left and right feeding mechanisms 37. As shown in FIGS. 1 and 5, power is transmitted to the drive shaft 38 from the fertilizer application power extraction shaft 59 of the traveling vehicle body 3. That is, as shown in FIGS. 3 and 5, the push-pull link 60 that is pushed and pulled with the rotation of the fertilizer application power take-out shaft 59, the first link arm 61 and the first link arm 61 to which the push-pull link 60 are linked are linked. Is fixed to the left end of the left-right linking shaft 62, and the second linking arm 63 fixed to the right end of the linking shaft 62, the first linking arm 61, and the second linking arm 63 are swung by the drive shaft 38. It is equipped with two one-way clutches 64, 65 and the like that convert to one-way rotation. The push-pull link 60 is connected to the left side surface of the first linking arm 61, and the amount of overhang along the lateral direction of the vehicle body is reduced as much as possible as compared with the case of connecting to the right side surface, and bending deformation occurs. I try to make it difficult.

As shown in FIG. 4, two output gears 67 that mesh with and interlock with the input gears 66 provided in each feeding mechanism 37 are externally fitted and mounted on the drive shaft 38 so as to be relatively rotatable. Further, two fertilizer application number switching clutches 68 that interrupt the transmission from the drive shaft 38 to the corresponding output gear 67 are fitted and mounted. In each fertilizer application number switching clutch 68, two number switching levers 69 provided in the boarding operation unit 10 are linked via an operation wire 70, and intermittent operation by the corresponding number switching lever 69 is possible.

As shown in FIG. 10, the fertilizer application number switching clutch 68 is provided with an operation arm 71. As shown in FIG. 11, the operation arm 71 is provided with a main body portion 71a having a U-shaped cross section, an operation pin 71b, and an inner receiving portion 71c that supports an end portion of the inner wire 70a of the operation wire 70. There is. A support shaft pin 72 along the vertical direction is inserted through the main body portion 71a of the operation arm 71 and the rear side frame body 45 in the fertilizer application frame 35, and the operation arm 71 is inserted into the rear side frame body 45. It is rotatably supported around the support shaft pin 72. The operation pin 71b is projected downward from the main body portion 71a.

The outer support 73 is also rotatably supported by the support shaft pin 72. The outer receiving tool 73 includes a fulcrum portion 73a through which the support shaft pin 72 is inserted, and a wire receiving portion 73b that supports the end portion of the outer wire 70b in the operation wire 70. When the operation wire 70 is pulled by the operation of the number switching lever 69, the outer receiver 73 hits the contact portion 74a formed on the linking member 74 described later, and further swinging is restricted. After that, when the operation wire 70 is further pulled, the inner wire 70a of the operation wire 70 pulls the inner receiving portion 71c, and the fertilizer application number switching clutch 68 is cut against the urging force of the spring 75. To. In this way, by supporting the outer receiver 73 in a rotatable manner, it is not necessary to weld the fertilizer frame 35, and the fertilizer frame 35 is made of a material unsuitable for welding, such as an aluminum material. Can also be supported.

As shown in FIG. 10, in addition to the fertilizer application number switching clutch 68, two planting number switching clutches 76 that interrupt the transmission to the two planting mechanism 28, and two vertical feeds. Two vertical feed number switching clutches 77 that interrupt the transmission to the mechanism are provided, and these are also linked to the number switching lever 69. As a result, the planting mechanism 28 and the vertical feed mechanism can also interrupt the power every two rows, like the feeding mechanism 37.

The fertilizer application device 15 is provided with a full-row stop mechanism 78 capable of switching each feeding mechanism 37 to a stopped state or an operating state regardless of the operating position of each number switching lever 69. As shown in FIG. 10, the full-row stop mechanism 78 is located along the upper surface of the rear frame body 45, and the stop switching lever 79 for stopping fertilization and the switching lever 79 are operated in the left-right direction. A slidable linking member 74 is provided. The stop switching lever 79 is provided on the right side of the fertilizer application device 15 and is supported so as to be rotatable around the vertical axis core. The linking member 74 is provided with a contacting action portion 80 that extends along the left and right directions over the left and right ends of the fertilizer applying device 15 and acts in contact with the operating arm 71 for the clutch. The contacting action portion 80 on the left side is integrally formed with the linking member 74, and the contacting action portion 80 on the right side is supported by the linking member 74 so as to be repositionable and adjustable in the longitudinal direction.

When the linking member 74 slides to the right with the rotation operation of the stop switching lever 79, the contacting action unit 80 contacts the operation arm 71, and each fertilizer application number switching clutch 68 is disengaged. It is operated, and each feeding mechanism 37 can be switched to the stopped state regardless of the operating position of each number switching lever 69. The stop switching lever 79 is configured to be able to hold the position at each of the right position and the left position by the detent mechanism.

As shown in FIG. 11, the linking member 74 is slidably mounted and supported only in the left-right direction of the machine body by a guide groove 81 formed on the upper surface of the rear frame body 45. The guide groove 81 is integrally formed by drawing when the rear frame body 45 is machined and formed. With such a configuration, for example, a guide member for regulating the slide direction is provided separately from the rear frame body 45, and the guide member is welded. Therefore, it is possible to avoid incurring high costs.

As shown in FIGS. 3 and 5, connecting brackets 82 are provided at locations corresponding to the left and right second connecting members 50 in the fertilizer application frame 35, and the connecting brackets 82 are secondly connected via the left and right connecting pins 83. It is rotatably supported around the horizontal axis P1 with respect to the member 50.

By manually operating the above-mentioned bolt 55 with a handle, the connection and disconnection between the horizontal surface portion 54B of the front connecting portion 54 and the seat support frame 22 on the rear side can be easily performed.

By operating the bolt 55 with a handle to release the connection between the horizontal surface portion 54B of the front connecting portion 54 and the seat support frame 22 on the rear side, the fertilizing device 15 can be attached to the fertilizing frame 35 and the left and right first supporting portions. It can be oscillated and displaced to the rear maintenance position around the horizontal axis P1 of the left-right connecting pin 83 that connects with B1. As a result, maintenance work such as cleaning of each feeding mechanism 37 provided in the fertilizer application device 15 can be easily performed.

[Posture switching configuration of fertilizer application device]
The first position and the first position where the fertilizer application device 15 is rotated in a predetermined direction (rearward) around the horizontal axis P1 from the work position and work position for fertilizer supply and the discharge duct 44 is exposed in a state of facing outward. The position holding mechanism IH that can hold the position at each of the second positions exposed in a state where the discharge duct 44 and the supply duct 43 face outward by rotating in a predetermined direction (rearward) around the horizontal axis P1. It is equipped.

As shown in FIG. 5, when the horizontal surface portion 54B of the front connecting portion 54 and the seat support frame 22 on the rear side are connected by using the bolt 55 with a handle, the fertilizer applying device 15 is positioned at the work position for fertilizer supply. It is fixed. This is the normal working condition.

Then, after tilting the driver's seat 13 to the front side, the bolt 55 with the handle is operated to release the connection between the horizontal surface portion 54B of the front side connecting portion 54 and the seat support frame 22 on the rear side, and the fertilizer application frame 35 is released. It becomes rotatable around the horizontal axis P1 of the left-right connecting pin 83 connected to the left and right first support portions B1. Therefore, the fertilizer application device 15, which is entirely supported by the fertilizer application frame 35, can be rotated rearward around the horizontal axis P1 of the connecting pin 83.

As shown in FIG. 12, the locking member 86 is integrally fixed and extended downward from the lower surface of the rear frame body 45, and two locking recesses 86a and 86b are provided at the tip of the locking member 86. Is formed. The fertilizer application device 15 is rotated so as to be inclined rearward, and a locking arm 84 (an example of a posture holder) having a substantially U-shape in a plan view provided on the seat support frame 22 on the rear side is provided. As shown in FIG. 5, it is rotated upward around the horizontal axis P2 at the end from the non-acting posture of retreating toward the machine body. Then, the free end portion of the locking arm 84 is locked to the locking recess 86b located on the rear side of the two locking recesses 86a and 86b in the locking member 86. When the locking arm 84 is locked in the locking recess 86b, the fertilizer application device 15 is held at the first position inclined by approximately 45 degrees from the working position.

As shown in FIG. 13, the fertilizer application device 15 is rotated so as to be tilted further rearward from the first position, and the locking arm 84 is placed in the two locking recesses 86a and 86b in the locking member 86. When the fertilizer application device 15 is locked in the locking recess 86a located on the front side, the fertilizer application device 15 is held at a second position inclined by approximately 90 degrees from the working position. The state of switching to the first position and the second position corresponds to the action posture in which the locking arm 84 projects toward the fertilizer application device 15.

Therefore, the position holding mechanism IH is composed of the locking arm 84 provided on the seat support frame 22 and the locking member 86 fixedly extended from the lower surface of the rear frame body 45. In this way, the locking member 86, which is a single member, can be used to hold the positions at the first position and the second position, respectively.

The fertilizer application device 15 is configured such that the guide hose 40 is detachable from the feeding mechanism 37 as the posture is changed from the working position to the first position or the second position. As shown in FIG. 5, the four guide hoses 40 are configured to be removably connected to the connection cylinder 87 provided in the supply duct 43. Then, as shown in FIGS. 3 and 5, hose holders 88 for holding the ends of the guide hoses 40 are provided so as to extend from the left and right support arms 48. When the fertilizer applicator 15 is rotated around the horizontal axis P1 in order to change the posture from the working position to the first position or the second position, the end of each guide hose 40 is supported by the hose holder 88. , The guide hose 40 can be removed from the connecting cylinder 87.

When the fertilizer application device 15 is rotated to the first position and the position is held, the discharge duct 44 is exposed in a state of facing outward as shown in FIG. At this time, the ejecting tool 58 is located in front of the machine body with respect to the feeding mechanism 37. Further, the discharge tool 8 is provided detachably from the feeding mechanism 37. As a result, for example, the discharge duct 44 can be removed to easily perform cleaning and other maintenance work inside the discharge duct 44. Further, when the fertilizer application device 15 is rotated to the second position and held in the position, not only the discharge duct 44 but also the supply duct 43 are exposed in a state of facing outward as shown in FIG. .. As a result, even when the connection with the blower 42 is released, not only the discharge duct 44 but also the supply duct 43 is removed, and a large-scale maintenance work such as cleaning the inside of each of these ducts 43 and 44 is performed. , Can be done easily. In this case, not only the inside of each duct 43 and 44 is cleaned, but also the upper part of the feeding mechanism 37 is greatly opened. Therefore, the case of the feeding mechanism 37 is opened to clean the inside of the feeding mechanism 37, etc. Will be easier to do. Further, as shown in FIG. 17, in the state of being switched to the second position, the tip opening (supply port to the guide hose) of the connecting cylinder 87 provided in the supply duct 43 faces the field. That is, the fertilizer is turned downward, and the fertilizer remaining inside the supply duct and the connecting cylinder is dropped and released as it is.

As shown in FIGS. 14 and 15, a duct holder 89 having a substantially C-shaped side view that integrally holds the discharge duct 44 and the supply duct 43 at a plurality of locations spaced apart from each other in the left-right direction, that is, in the longitudinal direction of the duct. It may be provided as a configuration. When such a duct holder 89 is provided, the discharge duct 44 and the supply duct 43 can be integrally removed without any trouble, and the work efficiency can be improved.

[Another Embodiment]
(1) In the above embodiment, the position holding mechanism IH is configured by the locking arm 84 and the locking member 86 provided on the seat support frame 22 side, but instead of this configuration, FIG. As shown, a configuration in which the free end portion of the locking arm 84 is locked to the locked portion 85 formed at the front end portion of the horizontal surface portion 54B of the front connecting portion 54 to hold the position at the first position. As shown in FIG. 17, at the second position, the free end portion of the locking arm 84 may be locked to one locking recess 86a formed at the tip end portion of the locking member 86. In this embodiment, the position holding mechanism IH is configured by the locking arm 84, the locked portion 85 formed on the front connecting portion 54, the locking member 86, and the like. In addition to the above configuration, the position holding mechanism includes, for example, a rotation angle adjusting mechanism capable of switching the rotation posture between the working position, the first position, and the second position at the rotation fulcrum portion of the fertilizer application frame 35. The configuration may be provided, and the configuration for holding the position can be variously changed.

(2) In the above embodiment, the guide hose 40 is detachable from the feeding mechanism 37 as the fertilizer application device 15 changes its posture from the working position to the first position or the second position. Instead of the above configuration, the guide hose 40 may be manually removed so as to maintain the state of being connected to the feeding mechanism 37 regardless of the posture change of the fertilizer application device 15.

(3) In the above embodiment, even if the fertilizer application device 15 changes its posture from the working position to the first position or the second position, the feeding mechanism 37 with the discharging duct 44 is connected via the discharging tool 58. However, instead of this configuration, the discharge tool 58 may be detachable from the feeding mechanism 37 as the fertilizer application device 15 changes its posture from the working position to the first position or the second position.

(4) In the above embodiment, the duct holder 89 for integrally holding the discharge duct 44 and the supply duct 43 is provided, but the duct holder 89 may not be provided. ..

(5) In the above embodiment, the one provided with two feeding mechanisms 37 is shown, but instead of this configuration, three or more feeding mechanisms 37 may be provided.

(6) In the above embodiment, as the powder or granular material supply device, a fertilizer application device 15 that supplies fertilizer, which is an example of powder or granular material, is shown. Instead of this configuration, the powder or granular material is supplied to a field, seedlings, or the like. It may be another powder or granular material supply device such as a chemical spraying device for spraying a chemical as an example, or a direct sowing device for directly sowing seed paddy as an example of powder or granular material in a field.

The present invention can be applied to, for example, a paddy field working machine provided with a powder or granular material supply device for supplying powder or granular material such as agricultural fertilizer, chemicals and seeds to a field.

15 Powder and granular material supply device 37 Feeding part 40 Guide hose 42 Blower 43 Supply duct 44 Discharge duct 89 Duct holder IH position holding mechanism

Claims (8)

The powder or granular material supply device that supplies the powder or granular material to the field is rotatably supported around the horizontal axis by the fixed frame on the machine body side.
To the powder or granular material supply device
A storage unit for storing granular materials, a plurality of feeding units for feeding out the granular materials stored in the storage unit downward, a plurality of guide hoses for guiding the fed out powder or granular material to a supply target location, and the guide hose. A blower that supplies the transport air to the blower, a supply duct that is located below the storage portion and supplies the transport air from the blower to the plurality of guide hoses, and powder particles remaining in the supply duct are separated from the blower. Equipped with a discharge duct that discharges by blowing air
A working position for supplying powder or granular material, a first position where the powder or granular material supply device is rotated in a predetermined direction around the horizontal axis from the working position and the discharge duct is exposed in a state of facing outward. A position holding mechanism capable of holding a position at each of the second positions exposed while the discharge duct and the supply duct face outward by rotating in a predetermined direction around the horizontal axis from the first position. Paddy working machine equipped. The paddy field working machine according to claim 1, wherein the guide hose is detachable from the feeding portion as the powder or granular material supply device changes its posture from the working position to the first position or the second position. .. As the powder or granular material supply device changes its posture from the working position to the first position or the second position, the discharge tool connecting the payout portion and the discharge duct is removable from the payout portion. The paddy field working machine according to claim 1 or 2. When the powder or granular material supply device swings around the horizontal axis and inclines from the working position to the first position, the discharge tool connecting the feed portion and the discharge duct is a machine body rather than the feed portion. Any of claims 1 to 3, wherein the guide hose located in the front and detachable from the feeding portion, and when inclined to the second position, the guide hose located behind the machine body from the feeding portion is detachable from the feeding portion. Paddy field work machine in item 1. The paddy field working machine according to any one of claims 1 to 4, wherein the second position is a position where the supply port from the supply duct to the guide hose faces the field. The paddy field working machine according to any one of claims 1 to 5, further comprising a duct holder for integrally holding the discharge duct and the supply duct. The position holding mechanism is positioned at each of the first position and the second position by engaging the posture holder on the machine body side with a single locked member on the powder or granular material supply device side. The paddy field working machine according to any one of claims 1 to 6, which can be held. The seventh aspect of claim 7, wherein the posture holder is supported on a seat support frame on the machine body side so as to be able to change its posture between a non-acting state in which it retreats toward the machine body and an acting state in which it projects to the powder or granular material supply device. Paddy field work machine.

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