JP5559583B2 - Agricultural machine - Google Patents

Description

  The present invention is provided with a granular material recovery path that guides the granular material remaining in the granular material supply device to the outside of the traveling vehicle body and enables removal of the residual granular material from the outlet at the end of the guide. Related to agricultural machines.

  As a farm work machine as described above, the work table (container cradle) for placing the collection container for storing the residual granular material taken out from the outlet is placed in a placement posture capable of placing the collection container. There is one configured to be integrally provided in a discharge pipe that forms a powder body recovery path so as to be located on the outer side of the vehicle body of the rear wheel (see, for example, Patent Document 1).

JP-A-10-215624 (paragraph number 0029, FIG. 10)

  In the above configuration, when recovering the granular material remaining in the granular material supply device, by placing the recovery container on the work table, the residual extracted from the outlet without holding the recovery container by hand A granular material can be stored in a collection container.

  However, since the work table always protrudes laterally outward from the vehicle body, it is easy to cause inconvenience of contacting the work table with another object during traveling. For this reason, when the machine is placed on the bed of a narrow truck for transportation or stored in a narrow barn, the work table becomes obstructive, making it easy to load and load in the barn.

  An object of the present invention is to enable easy loading into a narrow cargo bed and storage into a narrow barn while having a configuration including a work table.

In the first problem solving means of the present invention, the granular material remaining in the granular material supply device is guided to the outside of the traveling vehicle body, and the residual granular material can be taken out from the outlet at the guide end. In agricultural machines with a powder collection path,
A working position where a work table on which a collection container storing residual powder and granular materials taken out from the take-out port is placed is projected to the outside of the traveling vehicle body in a placement posture capable of placing the collection container; and Equipped so that the position can be changed to the retracted position where the amount of overhang to the outside of the car body decreases from the use position ,
The use position is set on the vehicle body outer side of the auxiliary wheel arranged on the vehicle body outer side of the rear wheel,
The work table is configured to be supported by a support arm that bypasses the rear wheel and the auxiliary wheel from the traveling vehicle body and extends to the use position .

  According to this problem solving means, when collecting the granular material remaining in the granular material supply device, the collection container is manually placed by placing the collection table on the work table with the work table positioned at the use position. The residual granular material taken out from the take-out port can be stored in the collection container without being held in the container. Thereby, the labor required for collection | recovery of a residual granular material can be reduced.

  When the residual granular material is not collected, it is possible to make it difficult for the work table to come into contact with other objects during traveling by positioning the work table in the retracted position. Accordingly, it is possible to prevent the work table from being in the way when being placed on the bed of a narrow truck for transportation or when being stored in a narrow barn.

  Therefore, although it is a structure provided with the work bench | work which can reduce the effort required for collection | recovery of a residual granular material, loading to a narrow carrier and storage to a narrow barn can be performed easily.

In addition, according to this problem solving means, in farm work machines such as riding rice transplanters and tractors, it is common to deploy a powder supply device such as a fertilizer and a chemical spraying device at the rear of the traveling vehicle body, Since auxiliary wheels are often deployed on the outer side of the rear wheel body in order to enable good running in a soft field, the working position of the workbench is set on the outer side of the auxiliary wheel body. Thus, when collecting the residual granular material, the collection container and the work container can be positioned at a position suitable for collecting the residual granular material close to the granular material supply device.
Therefore, the collection container can be positioned at a position suitable for collecting the residual granular material with the agricultural machine.

In the second problem solving means of the present invention, in the first problem solving means,
The support arm is L-shaped and cantilever-supports the work table.

According to this problem solving means , the work table is cantilevered by an L-shaped support arm that bypasses the rear wheel and the auxiliary wheel, thereby working with a U-shaped support member that bypasses the rear wheel and the auxiliary wheel. The worktable support structure can be simplified as compared with the case where the table is supported at both ends.

Therefore, it is possible to simplify the work table supporting structure.

In the third problem solving means of the present invention, in the first or second problem solving means,
The work bench is equipped with a receiving member for receiving the collection container from the side.

  According to this problem solving means, for example, when using a bag that easily deforms with an increase in the storage amount as a collection container, the bag can be received from the side of the bag by the receiving member, thereby making the bag more stable. In this state, it can be placed on the work table.

  As a result, the shape (posture) of the bag placed on the work table can be held substantially constant regardless of the increase in the storage amount, and the bag placed on the work table deforms as the storage amount increases and the work table is deformed. It is possible to effectively suppress the fear of falling from the outside.

In the fourth problem solving means of the present invention, in the third problem solving means,
The receiving member is configured to be switchable between a use posture standing with respect to the work table in a mounting posture and a storage posture along the work table.

  When collecting the residual granular material, the collection container can be placed on the work table in a more stable state by switching the receiving member to the use posture and receiving the collection container from the side. In addition, when storing the work table after the collection of the residual granular material, the receiving member is switched to the retracted position so that the receiving member is moved to the farming machine when the work table is moved to the retracted position. It is easier to avoid the possibility of interfering with other objects on the side.

  Therefore, it is possible to effectively prevent the receiving member from being hindered during the operation of changing the position of the work table while allowing the collection container to be placed on the work table in a more stable state.

In a fifth problem solving means of the present invention, in any one of the first to fourth problem solving means,
A fuel tank is provided at a position adjacent to the work table at the use position in the traveling vehicle body.

  According to this problem solving means, the work table can be used as a work table on which a replenishment tank for refueling is placed.

  Therefore, it is possible to facilitate refueling to the fuel tank without providing a work table for refueling.

It is the whole passenger rice transplanter right side view. It is a top view of a riding rice transplanter. It is a right view of the principal part which shows the non-collection state in 1st Embodiment. It is a right view of the principal part which shows the collection | recovery state in 1st Embodiment. It is a vertical front view of the principal part which shows the non-recovery state in 1st Embodiment. It is a vertical front view of the principal part which shows the collection | recovery state in 1st Embodiment. It is a vertical front view of the principal part which shows the structure of a fertilizer application apparatus. It is a cross-sectional top view of the principal part which shows the structure of a fertilizer application apparatus. It is a vertical right view of the principal part which shows the structure of a fertilizer application apparatus. It is a vertical right view of the principal part which shows the structure of a feeding mechanism. It is a vertical front view of the principal part which shows the structure of a feeding mechanism. It is the schematic which shows the flow of the conveyance wind in an operation state. It is the schematic which shows the flow of the conveyance wind in a collection | recovery state. It is a vertical front view of the principal part which shows the non-collection state of a conveyance direction change part and a closure member. It is a vertical front view of the principal part which shows the collection state of a conveyance direction change part and a closure member. It is a vertical side view of the principal part which shows the non-collection state of a conveyance direction change part and a closure member. It is a figure which shows the structure of a closure member. It is a rear view of the principal part which shows the structure of the collection container support structure in 1st Embodiment. It is a disassembled perspective view of the principal part which shows the structure of the collection container support structure in 1st Embodiment. It is a vertical front view of the principal part which shows another collection container support structure in 1st Embodiment. It is a top view of the principal part which shows the display structure of the fertilizer feed amount. It is a perspective view of the principal part which shows another display structure of the fertilizer feed amount. It is an expanded view of the scale notation member used with another display structure of the fertilizer feed amount. It is a vertical front view of the principal part which shows the structure of the collection container support structure in 2nd Embodiment. It is a right view of the principal part which shows the structure of the collection container support structure in 2nd Embodiment. It is a front view which shows the structure of the principal part of the collection container support structure in 2nd Embodiment.

[First Embodiment]
Hereinafter, as an example of an embodiment for carrying out the present invention, a first embodiment in which the present invention is applied to a riding rice transplanter that is an example of an agricultural machine will be described with reference to the drawings.

  As shown in FIGS. 1 to 6, the riding rice transplanter exemplified in this embodiment is for the eight strips via a link mechanism 3 that swings up and down by the operation of a hydraulic lifting cylinder 2 at the rear of the traveling vehicle body 1. The seedling planting device 4 is connected to be capable of being driven up and down. Moreover, the fertilizer application apparatus 5 for 8 articles | rows which are an example of a granular material supply apparatus is equipped over the rear part of the traveling vehicle body 1 and the seedling planting apparatus 4. Thereby, it is comprised to the mid-mount fertilization specification for 8 strips.

  A traveling vehicle body 1 includes a hydrostatic continuously variable transmission (not shown) and a transmission case (hereinafter referred to as a T / M case) provided with power from an engine 7 mounted on a front portion of a body frame 6 as a main transmission. 8) is configured to be a four-wheel drive type that is transmitted to the left and right front wheels 9 and the left and right rear wheels 10 via a gear-type transmission (not shown) incorporated as an auxiliary transmission. Auxiliary wheels 11 that rotate integrally with the left and right rear wheels 10 are arranged on the outer side of the left and right rear wheels 10. On the rear side of the engine 7, a steering wheel 12 for driving the front wheels, a driver's seat 13, and the like are provided to form a boarding driver 14.

  The body frame 6 is composed of a T / M case 8 also serving as a frame, a front frame 15 connected to the front part of the T / M case 8, a rear frame 16 connected to the rear part of the T / M case 8, and the like. It is. The vehicle body frame 6 is disposed above the boarding step 17 that forms the floor surface of the boarding operation unit 14, the left and right extension steps 18 that extend the floor surface to the left and right, and the left and right rear wheels 10 and the auxiliary wheels 11. A rear step 19 that is used as a platform when the seedling planting apparatus 4 is replenished with seedlings, and the like are equipped. A fuel tank 20 is disposed at the lower part of the rear portion of the right expansion step 18. The fuel tank 20 is supported by the rear frame 16 via front and rear tank support members 21 and 22. At the left and right lateral sides of the front portion of the vehicle body frame 6, a preliminary seedling mounting frame 24 equipped with three preliminary seedling mounting bases 23 at a predetermined interval in the vertical direction is erected.

The seedling planting device 4, the power for planting taken out from the T / M case 8, through the first transmission shaft 25 planted transmission system 26 configured in such that deployed in the lower part of the vehicle body 1 in the longitudinal direction It is communicated. The fertilizer application device 5 transmits fertilizer power extracted from the T / M case 8 via a fertilizer transmission system 28 including a second transmission shaft 27 and the like arranged in the front-rear direction at the lower part of the traveling vehicle body 1. is there. The fertilizer transmission system 28 converts the rotational motion of the second transmission shaft 27 that rotates with the fertilizer power taken out from the T / M case 8 into a swing motion.

  Although not shown, the T / M case 8 has a built-in planting clutch that intermittently transmits power to the seedling planting device 4 and a fertilizer clutch that intermittently transmits power to the fertilizer device 5.

  As shown in FIGS. 1 and 2, the seedling planting device 4 is a power for planting work from the T / M case 8, and includes a lateral feed mechanism (not shown) and eight rotary type planting mechanisms 29. , And eight vertical feed mechanisms 30 are operated. And by these operation | movement, it has comprised so that a maximum of 8 seedlings may be planted. The lateral feed mechanism reciprocates the seedling placing table 31 formed so as to place the mat-like seedlings for eight strips in a left and right direction with a constant stroke. Each planting mechanism 29 cuts a predetermined amount of seedlings from the lower end of the mat-like seedlings placed on the seedling placing stand 31 by its operation and plantes them in the mud portion of the field. Each vertical feed mechanism 30 feeds each mat-like seedling vertically at a predetermined pitch toward the lower end of the seedling stage 31 every time the seedling stage 31 reaches the left and right stroke ends due to its operation. At the bottom of the seedling planting device 4, five leveling floats 32 are arranged side by side in the left-right direction in a state of swinging up and down with their rear portions as fulcrums. Each leveling float 32 levels the field mud surface such as a planting planned place by sliding on the ground as the traveling vehicle body 1 travels.

  Although illustration is omitted, the seedling planting device 4 has four auxiliary clutches for planting that intermittently transmit power to the planting mechanism 29 in two pairs, and transmission to the vertical feed mechanism 30 in two sets. And four auxiliary clutches for vertical feed. These auxiliary clutches for planting and vertical feeding are operated by four operating tools for operating the auxiliary clutch provided in the boarding operation unit 14. Each of the operation tools for operating the auxiliary clutch is operated so that the planting auxiliary clutch and the vertical feeding auxiliary clutch corresponding to the same planting line are collectively operated. The operation is linked to the auxiliary clutch through a linkage mechanism for operating the auxiliary clutch. As the operation tool for operating the auxiliary clutch, for example, an on / off switch or an operation lever can be employed. As the linkage mechanism for operating the auxiliary clutch, a mechanical type or an electric type can be adopted.

  Then, by operating the auxiliary clutches for planting and vertical feeding with these operating tools, the operation state of the seedling planting device 4 is changed so that all the planting mechanisms 29 and the vertical feeding mechanisms 30 are operated. State (8-row planting state), left 6-row planting state in which the planting mechanism 29 and vertical feed mechanism 30 corresponding to the left 6 strip are operated, and planting mechanism 29 and vertical feed mechanism 30 in accordance with the left 4 strip are operated Left four-row planting state, left two-row planting state in which the planting mechanism 29 and the vertical feed mechanism 30 corresponding to the left two strips are operated, and a planting stop state in which all the planting mechanisms 29 and the vertical feed mechanism 30 are deactivated (leveling) Working state), a right six-row planting state in which the planting mechanism 29 and the vertical feed mechanism 30 corresponding to the right six strips are operated, a right four-row planting in which the planting mechanism 29 and the vertical feed mechanism 30 corresponding to the right four strips are operated. Condition or right 2 articles It can be switched to the corresponding right Article 2 planted state for operating the planting mechanism 29 and the longitudinal feeding mechanism 30.

  As shown in FIGS. 1 to 13, the fertilizer application device 5 includes a fertilizer feeding unit 5 </ b> A mounted on the rear portion of the traveling vehicle body 1, and a fertilizer guiding unit 5 </ b> B extending from the fertilizer sending unit 5 </ b> A to the seedling planting device 4. In the fertilizer delivery unit 5A, four feeding mechanisms 33 are operated by the fertilizing power from the T / M case 8, and a predetermined amount of granular fertilizer is stored from the hopper 34 that stores granular fertilizer that is an example of a granular material. Each granular fertilizer that has been fed out and fed out is transported to the fertilizer guide section 5B by being put on a conveying wind generated by the electric blower 35. The fertilizer guide part 5B guides the granular fertilizer from the fertilizer delivery part 5A down to the corresponding grooving device 37 by a total of eight fertilization hoses 36 provided with two for each feeding mechanism 33. The container 37 is buried in mud in the field. Thereby, it is comprised so that a maximum of 8 fertilization may be performed. The fertilizer delivery section 5A is supported by a fertilizer frame 38 connected to the rear upper part of the rear frame 16 so as to be positioned above the rear step 19.

  Each feeding mechanism 33 is configured for two strips capable of feeding a maximum of two granular fertilizers. The hopper 34 is configured by connecting four storage containers 39 made of transparent resin in the left-right direction. And the single cover body 40 which opens and closes the upper opening of each storage container 39 collectively is equipped so that opening / closing rocking | fluctuation is possible. The blower 35 is configured to operate in conjunction with the grounding of the seedling planting device 4 in a state where it is transmitted to the fertilizer application device 5 and to stop operating in conjunction with the floating of the seedling planting device 4. Then, the conveying air generated by the operation is supplied to each feeding mechanism 33 through the branch duct 41 and the left supply duct 42 or the right supply duct 43. Each fertilization hose 36 guides the granular fertilizer fed by the corresponding feeding mechanism 33 to the corresponding groove forming device 37 along with the conveying wind. Each grooving device 37 is mounted on the corresponding leveling float 32 so as to be positioned at a predetermined interval in the left-right direction. Then, as the traveling vehicle body 1 travels, a fertilization groove is formed in the mud portion located near the lateral side of the planned planting place in the field, and a corresponding fertilization hose 36 is guided down in the groove. Buried granular fertilizer.

  The left and right supply ducts 42, 43 are arranged so as to pass through the portion just in front of each lower case 49. The left end of the recovery duct 45 is connected to the left end of the left supply duct 42 through a U-shaped relay duct 44 in plan view. The collection duct 45 is disposed so as to pass through a portion immediately behind each upper case 48. The right end of the recovery duct 45 is connected to the left end of a discharge duct 46 that separates the conveying air and the recovered granular fertilizer and discharges it to the right outside of the vehicle body. A cap 47 that closes the right end of the right supply duct 43 is connected to the right end of the right supply duct 43.

  As shown in FIGS. 10 and 11, each feeding mechanism 33 includes an upper case 48 and a lower case 49 made of transparent resin. Between the upper case 48 and the lower case 49, a left and right feeding shaft 51 provided with left and right fertilizer feeding portions 50 are provided. Each upper case 48 is connected in communication with the lower part of the corresponding storage container 39. Each lower case 49 is formed in a bifurcated shape including two funnel portions 49A divided into left and right corresponding to the left and right fertilizer feeding portions 50. The left and right fertilizer feeding sections 50 are configured to be fitted on the left and right cylinder shafts 52 that are fitted on the feeding shaft 51 so as to be rotatable relative to each other so that the two feeding rolls 53 are integrally rotated. The left and right cylinder shafts 52 are operated by sliding a three-position switching type key member 54 provided on the feeding shaft 51 so as to be slidable so that both the left and right cylinder shafts 52 rotate integrally with the feeding shaft 51. The feed state can be switched between a left single feed state in which the left cylinder shaft 52 rotates integrally with the feed shaft 51 and a right single feed state in which the right cylinder shaft 52 rotates integrally with the feed shaft 51. On the outer periphery of each feeding roll 53, a plurality of recesses 53A for feeding fertilizer are formed in a line at regular intervals in the circumferential direction. A brush 55 is disposed between the upper case 48 and the lower case 49 on the front side of the left and right fertilizer feeding parts 50 to sweep off the granular fertilizers protruding from the respective recesses 53A. Thereby, each feeding mechanism 33 rotates the right and left fertilizer feeding sections 50 integrally with the feeding shaft 51 in the right side view so that the granular fertilizer stored in the corresponding storage container 39 is left and right of the lower case 49. A predetermined amount can be fed out to the funnel portion 49A.

  As shown in FIGS. 3 to 11, each feeding shaft 51 is integrally formed with a driven gear 51 </ b> A. A long feeding drive shaft 56 common to each feeding mechanism 33 is arranged in a right-and-left orientation across each feeding mechanism 33 at a position immediately after each feeding shaft 51. A transmission gear 57 that meshes with the corresponding driven gear 51A is externally fitted to a portion corresponding to each driven gear 51A in the feeding drive shaft 56 so as to be relatively rotatable. Between the feeding drive shaft 56 and each transmission gear 57, an auxiliary clutch 58 for fertilization for intermittently transmitting power from the feeding drive shaft 56 to each transmission gear 57 is provided. The right end portion of the feeding drive shaft 56 is connected to the fertilization transmission system 28 via a one-way clutch 59 that converts the swinging motion of the fertilization transmission system 28 into intermittent rotation motion.

  That is, each feeding mechanism 33 is rotated one by one from each of the left and right fertilizer feeding sections 50 by rotating the left and right fertilizer feeding sections 50 together with the feeding shaft 51 with the power for fertilization from the T / M case 8. A total of two granular fertilizers are fed out by a predetermined amount, and either the left or right fertilizer feeding unit 50 rotates intermittently together with the feeding shaft 51, so that one granular fertilizer is fed from either the left or right fertilizer feeding unit 50. Is fed out by a predetermined amount.

  Although illustration is omitted, the operation of each of the auxiliary clutches 58 for fertilization is performed by four operating tools for operating the auxiliary clutch provided in the boarding operation unit 14, and the auxiliary clutch for planting corresponding to the same planting line and for vertical feed The operation is linked to the corresponding operation tool for operating the auxiliary clutch via a link mechanism for operating the auxiliary clutch so as to be performed together with the auxiliary clutch.

  And by operating each auxiliary clutch for fertilization with these operating tools, the operation state of the fertilizer application device 5 is changed to the full-row fertilization state (8-row fertilization state) in which all the feeding mechanisms 33 are operated, and the left-side 6 strips. Left six-row fertilization state in which the corresponding feeding mechanism 33 is operated, left four-row fertilization state in which the feeding mechanism 33 corresponding to the left four is operated, left two-row fertilization state in which the feeding mechanism 33 corresponding to the left two is operated, Fertilization stop state in which all the feeding mechanisms 33 are deactivated, right six-row fertilization state in which the feeding mechanism 33 corresponding to the right six is activated, right four-row fertilization state in which the feeding mechanism 33 corresponding to the right four is activated, or Then, it is possible to switch to the right two-row fertilization state in which the feeding mechanism 33 corresponding to the right two-row is operated.

  As shown in FIG. 10, two engagement holes 48 </ b> A arranged in the left and right are formed in the rear lower part of each upper case 48. At the rear upper part of each lower case 49, left and right engaging pieces 49B that engage with the engaging holes 48A of the corresponding upper case 48 are formed. Each lower case 49 swings up and down in the vertical direction with a rear engagement portion where the engagement hole 48A of the upper case 48 and the engagement piece 49B of the lower case 49 are engaged as a fulcrum.

  Although not shown, locking protrusions are formed on the left and right sides of each upper case 48. On the left and right sides of each lower case 49, the lower case 49 is closed in a closed posture in which the upper edge portion of the lower case 49 is in close contact with the lower edge portion of the upper case 48 by engaging with the engaging protrusions of the corresponding upper case 48 A lock lever for fixing the case 49 is provided so as to be swingable in the vertical direction.

  In each feeding mechanism 33, the dividing line in a side view of the upper case 48 and the lower case 49 is set so as to be inclined upward. As a result, when the lower case 49 is switched to the open position and the state of the left and right fertilizer feeding parts 50 received and supported by the lower case 49 is visually recognized from the front upper side of the feeding mechanism 33, the upper case 48 is put into view. Can be difficult. As a result, maintenance work such as cleaning of each fertilizer feeding unit 50 and replacement of the brush 55, which is performed from the front side of the feeding mechanism 33 in a state where the lower case 49 is switched to the open posture, is facilitated.

  As shown in FIGS. 7 to 13, the left and right funnel portions 49 </ b> A of each lower case 49 include a cylindrical air guide tube portion 49 </ b> C extending forward from the bottom portion of the funnel portion 49 </ b> A and a bottom portion of the funnel portion 49 </ b> A. A cylindrical discharge pipe portion 49D extending from the rear to the rear is formed so as to communicate with the bottom of the funnel portion 49A. Each of the air guide pipe portions 49C is connected to the left and right supply ducts 42 and 43 through an air guide member 60 that guides the conveying air flowing through the left and right supply ducts 42 and 43 to the air guide pipe portion 49C. A corresponding fertilization hose 36 is connected to each discharge pipe portion 49D. As a result, a predetermined amount of granular fertilizer fed to each funnel portion 49A is put on the conveying air from the blower 35 introduced into each funnel portion 49A from the left and right supply ducts 42, 43, and the fertilizer hose 36 and the grooving device 37. It can be fed into the fertilization groove of the field through the inside of the field.

  On the back of each upper case 48, a recovery port 48B having a rectangular shape as viewed from the back is formed to enable recovery of the granular fertilizer remaining in the hopper 34 and the upper case 48. A recovery duct 45 is connected to the recovery port 48B. Each upper case 48 is equipped with an opening / closing member 61 that opens and closes the collection port 48B so that an opening / closing swinging operation using a left and right support shaft 62 provided at the upper portion of the opening / closing member 61 as a fulcrum is possible. . Each open / close member 61 is linked to a single operation lever 63 provided on the fertilizer application frame 38 so as to be swingable up and down via a first linkage mechanism 64 corresponding to each open / close member 61. As a result of this linkage, the opening and closing members 61 are simultaneously swung in the closing direction in conjunction with the upward swing operation of the operation lever 63, and are opened and closed in conjunction with the downward swing operation of the operation lever 63. The members 61 are configured to swing in the opening direction all at once.

  The operation lever 63 is bent in an L shape having a long support shaft portion 63A and a short grip portion 63B. The assembly posture is set so that the support shaft portion 63A has a lateral orientation across the feeding mechanisms 33, and the gripping portion 63B has a longitudinal orientation extending toward the boarding operation portion 14. . Further, it can be switched and held between the upper and lower positions by the action of the toggle spring 65 installed over the fertilizer frame 38 and the gripping portion 63B.

  The blower 35 is supported by the rear frame 16 so as to be positioned below the driver seat 13. And it is comprised so that the external air dried at the high temperature of the engine periphery may be taken in via the intake duct 66 connected in communication with 35 A of intake pipe parts of the air blower 35 (refer FIG. 2). Thereby, the external air dried at high temperature around the engine can be used as the conveying air, and the effect of drying the granular fertilizer by the high-temperature dry conveying air and promoting the conveying of the granular fertilizer can be expected.

  The lower end portion of the branch duct 41 is connected to the exhaust pipe portion 35 </ b> B of the blower 35. The branch duct 41 is switched to a blocking posture that blocks the communication between the branch duct 41 and the right supply duct 43 by an upward swinging operation with the support shaft 67 facing forward and backward as a fulcrum. A first switching member 68 that switches to a communication posture that allows the branch duct 41 and the right supply duct 43 to communicate with each other by a downward swinging operation as a fulcrum is incorporated. The first switching member 68 is linked to the operation lever 63 via the second linkage mechanism 69. By this linkage, the operation lever 63 is configured to switch to the communication posture in conjunction with the upward swinging operation of the operation lever 63, and to switch to the blocking posture in conjunction with the downward swinging operation of the operation lever 63. is there.

  The relay duct 44 is switched to a communication posture in which the left supply duct 42 and the recovery duct 45 are communicated with each other by a forward swinging operation with the vertical support shaft 70 as a fulcrum, and the vertical support shaft 70 is used as a fulcrum. A second switching member 71 is incorporated that switches to a blocking posture that blocks communication between the left supply duct 42 and the recovery duct 45 by a backward swing operation. The second switching member 71 is linked to the operation lever 63 via the third linkage mechanism 72. By this linkage, the operation lever 63 is configured to switch to the blocking posture in conjunction with the upward swing operation, and to switch to the communication posture in conjunction with the downward swing operation of the operation lever 63. is there.

  From the above configuration, all the opening / closing members 61, the first switching member 68, and the second switching member 71 are rocked and displaced simultaneously in conjunction with the rocking operation of the operation lever 63. In the state where the operation lever 63 is held at the upper operation position by the action of the toggle spring 65, each opening / closing member 61 maintains the closed posture to close the collection port 48B of the corresponding feeding mechanism 33, and the first switching member 68 is branched. The communication posture that allows the duct 41 and the right supply duct 43 to communicate with each other is maintained, and the second switching member 71 maintains the blocking posture that blocks the communication between the left supply duct 42 and the recovery duct 45. Thereby, the conveying air from the blower 35 flows into the left and right funnel portions 49A of the feeding mechanisms 33 from the left and right air guide pipe portions 49C of the feeding mechanisms 33 through the branch duct 41 and the left and right supply ducts 42 and 43. When the feeding mechanism 33 is fed to the left and right funnels 49A, a small amount of granular fertilizer is conveyed through the corresponding fertilizing hose 36 and the grooving device 37 into the fertilizing groove in the field.

  In the state where the operation lever 63 is held at the lower operation position by the action of the toggle spring 65, each opening / closing member 61 maintains the opening posture to open the collection port 48B of the corresponding feeding mechanism 33, and the first switching member 68 is The blocking posture for blocking communication between the branch duct 41 and the right supply duct 43 is maintained, and the communication posture in which the second switching member 71 connects the left supply duct 42 and the recovery duct 45 is maintained. Thereby, the conveyance wind from the blower 35 flows into the recovery duct 45 from the branch duct 41 through the left supply duct 42 and the relay duct 44, and flows into the recovery duct 45 from the recovery port 48B of each feeding mechanism 33 ( Residual fertilizer) is conveyed to the discharge duct 46.

  In other words, the operation position above the operation lever 63 is the fertilization position, and the operation lever 63 is operated to the fertilization position in a fertilization state in which any one of the feeding mechanisms 33 is operating, so that the conveyance wind from the blower 35 is supplied to the field. It can be used for supplying fertilizer to the farm, and the fertilizer can be smoothly supplied to the field. Further, the operation position below the operation lever 63 is the fertilizer collection position, and the operation tool for operating the auxiliary clutch is operated in the blower operating state where the seedling planting device 4 is grounded by being transmitted to the fertilizer application device 5. By operating the operation lever 63 to the fertilizer collection position in the fertilizer stop state in which all the feeding mechanisms 33 are stopped, the conveying air from the blower 35 can be used for collecting the granular fertilizer remaining in the fertilizer 5. The residual fertilizer can be collected easily and quickly.

  As shown in FIGS. 10, 12, and 13, in the collection duct 45, the connection portion 45 </ b> A with the collection port 48 </ b> B of each feeding mechanism 33 is recessed toward the inside of the collection duct 45. Further, a narrowed portion 45B having a triangular shape in plan view is formed on the side surface of each connection portion 45A on the lower side in the fertilizer collecting direction. This prevents a decrease in fertilizer recovery efficiency due to the conveyance air flowing into the feeding mechanism 33 from each recovery port 48B at the time of fertilizer recovery or vortex generation at the connection portion 45A of the recovery duct 45. is there.

  As shown in FIGS. 3 to 9 and FIGS. 12 to 16, the discharge duct 46 includes a connection portion 46 </ b> A that communicates with the right end portion of the recovery duct 45, and a U-shaped transport direction changing portion 46 </ b> B that changes the transport direction downward. , And an outlet 46C that makes it possible to take out the granular fertilizer. And it is made to extend from the collection | recovery duct 45 so that the outlet 46C may be located in the right outer side of a vehicle body.

  The connecting portion 46A is formed in a circular shape with the same diameter as the right end portion of the recovery duct 45 (see FIG. 9). Flange 46D, 45C for connection is formed in the right end part of the connection part 46A and the collection | recovery duct 45. As shown in FIG. The connecting portion 46A and the right end portion of the recovery duct 45 are connected in a communicable manner so as to be rotatable relative to each other via an annular connector 73 having a U-shaped cross-sectional shape straddling the flanges 46D and 45C.

  The transport direction changing portion 46B has a cross-sectional shape on the upper side in the transport direction that is continuous with the connection portion 46A and is formed in a circle having the same diameter as the connection portion 46A [see FIG. A predetermined position on the upper side in the conveying direction is received and supported from below by a support plate 74 provided on the fertilizer application frame 38. Further, the cross-sectional shape on the lower side in the conveying direction that is inclined to the right is formed in a D-shape in which the upper end portion is flat [see FIG. 16]. Furthermore, a rectangular bulging portion 46Ba that bulges upward is provided at the upper end on the lower side in the conveying direction, and a rectangular shape having a long length in the conveying direction leaving a frame-shaped peripheral edge on the bulging portion 46Ba. An exhaust port 46Bb having a shape is formed. And the porous surface part 75A which formed many ventilation holes 75a exhausted the rectangular porous board 75 comprised so that the passage of granular fertilizer might be prevented by forming many ventilation holes 75a smaller than the particle size of granular fertilizer. It is deployed in a state of being fitted into the bulging portion 46Ba so as to face the opening 46Bb. At the lower portion of the bulging portion 46Ba, a position-holding locking projection 46Bc that holds the porous plate 75 is formed inwardly protruding so that the peripheral portion of the porous plate 75 is joined to the inner peripheral surface of the bulging portion 46Ba. It is.

  The porous plate 75 may be made of metal or resin. Further, instead of the perforated plate 75, a mesh such as a wire net or a resin net configured to prevent the passage of the granular fertilizer by making the mesh smaller than the granular fertilizer and for ventilation may be adopted.

  The outlet 46C is formed in a D-shape in which the upper end of the cross-sectional shape is the same as the shape on the lower side in the transport direction in the transport direction changing portion 46B [see FIG. 4].

  From the above configuration, when the granular fertilizer recovered from the recovery duct 45 along with the transport air flows into the discharge duct 46, the transport air passing through the perforated plate 75 and the perforated plate 75 on the lower side in the transport direction of the transport direction changing unit 46B. Separate into granular fertilizer that does not pass. Then, the granular fertilizer that does not pass through the perforated plate 75 is caused to flow down toward the outlet 46C and discharged from the outlet 46C to the outside. That is, for example, when the granular fertilizer is configured to be discharged from the outlet 46C together with the conveying wind, the conveying wind flows together with the granular fertilizer into a collection container such as a fertilizer bag provided to receive the granular fertilizer from the outlet 46C. As a result, the granular fertilizer stored in the collection container is likely to cause a disadvantage that the granular fertilizer is blown out from the collection container and scattered. On the other hand, in the structure exemplified in this embodiment, the conveying wind flows out to the outside on the lower side of the conveying direction of the conveying direction changing unit 46B, and only the granular fertilizer flows out from the outlet 46C. It is possible to prevent the conveying air from flowing into the fertilizer bag (an example of a collection container) Z provided to receive the granular fertilizer from the outlet 46C. As a result, it is possible to avoid blowout of the granular fertilizer from the fertilizer bag Z caused by the conveyance air flowing into the fertilizer bag Z, and it is possible to efficiently collect the residual fertilizer without waste.

  Further, the connecting portion 46A of the discharge duct 46 is connected to the recovery duct 45 by connecting the right end portion of the recovery duct 45 and the connection portion 46A of the discharge duct 46 so as to be relatively rotatable via an annular connector 73. The recovery duct 45 and the connecting portion 46A can be rotated relative to each other with a common central axis as a fulcrum. As a result, the flow direction of the granular fertilizer by the discharge duct 46 can be adjusted in the front-rear direction.

  As shown in FIG. 15, in the transport direction changing unit 46B, the collision angle θ of the granular fertilizer with respect to the perforated plate 75 is set to be a relatively shallow angle (an angle smaller than 45 degrees, for example, about 30 degrees). is there. Thereby, the impact when the granular fertilizer collides with the porous plate 75 can be weakened, the granular fertilizer may be damaged due to the impact when the porous fertilizer 75 collides, or the granular fertilizer broken by the collision with the porous plate 75 Can prevent a decrease in the fertilizer recovery rate due to passing through the perforated plate 75.

  In addition, the immediately preceding location in the transport direction with respect to the exhaust port 46Bb of the transport direction changing portion 46B is set as the curved portion 46Bd of the transport direction changing portion 46B. Thereby, since granular fertilizer receives the downward guidance effect | action which leaves | separates from the perforated plate 75 when passing curved part 46Bd, the impact at the time of a granular fertilizer colliding with the perforated plate 75 can further be weakened. As a result, it is possible to more reliably prevent the fertilizer recovery from being caused by the risk of damage to the granular fertilizer due to the collision with the perforated plate 75 and the granular fertilizer crushed by the collision with the perforated plate 75 passing through the perforated plate 75. can do.

  In the transport direction changing portion 46B, the upper edge of the exhaust port 46Bb (the upper end of the porous surface portion 75A in the porous plate 75) is located at the same height position as the inner peripheral upper end of the transport direction changing portion 46B on the upper side in the transport direction, and The lower edge of the exhaust port 46Bb (the lower end of the porous surface portion 75A of the porous plate 75) is formed at a position lower than the lower end of the inner periphery on the upper side in the transport direction of the transport direction changing portion 46B. Thereby, in a side view (conveying direction view on the upper side of the conveying direction of the conveying direction changing unit 46B), an almost entire area of the airway cross section on the upper side of the conveying direction in the conveying direction changing unit 46B faces the exhaust port 46Bb. It has become. As a result, the conveyance air passing through the upper side in the conveyance direction of the conveyance direction changing portion 46B located on the extension line of the recovery duct 45 can be smoothly discharged from each vent hole 75a of the porous plate 75 provided in the exhaust port 46Bb. .

  In addition, as the conveyance direction changing portion 46B, the upper edge of the exhaust port 46Bb (the upper end of the porous surface portion 75A of the porous plate 75) is substantially the same height as the inner peripheral upper end of the conveyance direction changing portion 46B on the upper side in the conveyance direction. Further, the lower edge of the exhaust port 46Bb may be the same height as the lower end of the inner periphery on the upper side in the transport direction of the transport direction changing portion 46B or slightly higher than the lower end of the inner periphery. It may be formed.

  As shown in FIGS. 1 to 8 and FIGS. 15 to 17, a rubber cover body 76 is attached to the discharge duct 46 in a detachable manner. The cover body 76 includes a cover portion 76A having a rectangular shape in plan view that covers the upper end portion of the transport direction changing portion 46B from above and closes the exhaust port 46Bb. At the right end of the cover portion 76A, a cap portion 76B having a substantially D shape in side view for closing the outlet 46C is integrally formed. The cover portion 76A includes a peripheral wall 76Aa that is continuous with a depending wall portion 76Ba formed in the upper half of the cap portion 76B. A first locking ring 76 </ b> C that is externally fitted to a first locking protrusion 46 </ b> E that is erected on the connection portion 46 </ b> A of the discharge duct 46 is integrally formed at the left end portion of the cover portion 76 </ b> A. Below the cap portion 76B, a second locking ring that is externally fitted to a second locking projection 46F suspended from the right end portion of the discharge duct 46 or a third locking projection 46G standing at the right end portion of the discharge duct 46. 76D is integrally formed. An operation piece 76E is integrally formed at the lower end of the second locking ring 76D. When the second locking ring 76D of the cover body 76 is fitted over the second locking protrusion 46F of the discharge duct 46, the third locking protrusion 46G of the discharge duct 46 is covered from above at the upper right end of the cover portion 76A. A hemispherical bulging portion 76Ab is provided. The cap portion 76B is formed with an annular engagement groove 76Bb that fits outwardly on an annular protrusion 46Ca that bulges outward at the outlet periphery of the discharge duct 46.

  In the state where the first locking ring 76C of the cover body 76 is externally fitted to the first locking protrusion 46E of the discharge duct 46 and the left end portion of the cover body 76 is fixed, the right outer side of the traveling vehicle body 1 is configured. By grasping the operation piece 76E of the cover body 76 from the second position and changing the locking position of the second locking ring 76D to the second locking projection 46F and the third locking projection 46G of the discharge duct 46, the discharge duct 46 The cover body 76 is attached in a closed posture in which the cover body 76 covers the lower side in the transport direction of the transport direction changing portion 46B from above, the cover portion 76A closes the exhaust port 46Bb, and the cap portion 76B closes the outlet 46C. 14), and the cover body 76 is positioned immediately above the exhaust port 46Bb and the outlet 46C of the transport direction changing portion 46B and opens the exhaust port 46Bb and the outlet 46C [FIG. It is possible to easily change to the reference].

  Thereby, at the time of fertilization work without collecting the granular fertilizer or at the time of work stoppage during moving traveling, the cover body 76 is attached to the closed position, so that the discharge duct 46 at the time of fertilization work or at the time of work stoppage is set. Intrusion of rainwater and the like from the exhaust port 46Bb and the outlet 46C can be prevented. Further, at the time of collecting fertilizer for collecting granular fertilizer, the cover body 76 is attached in an open posture so that the conveying wind and granular fertilizer are separated and collected from the outlet 46C by the conveying direction changing unit 46B. Fertilizer can be taken out. In this open posture, the cover body 76 is positioned above the transport direction changing portion 46B, so that intrusion of rainwater and the like from the exhaust port 46Bb and the outlet 46C of the discharge duct 46 can be suppressed. That is, the cover body 76 can be used as a rain guard.

  In particular, in the closed posture of the cover body 76, the peripheral edge 76Aa of the cover portion 76A covers the lower edge of the lower side in the transport direction of the transport direction changing portion 46B in which the exhaust port 46Bb is formed, and the cap portion 76B is engaged. Since the joint groove 76Bb is externally fitted to the protrusion 46Ca at the periphery of the outlet in the discharge duct 46 over the entire circumference of the outlet 46C, the exhaust port 46Bb and the outlet 46C of the discharge duct 46 when high-pressure washing water is sprayed. Intrusion of cleaning water from water can be suppressed.

  When the collected granular fertilizer is stored in the fertilizer bag Z, the outer upper end of the fertilizer bag Z is placed between the second locking ring 76D of the cover body 76 and the third locking projection 46G of the discharge duct 46. By sandwiching, the upper part of the fertilizer bag Z can be fixed in a state where it covers the end of conveyance of the discharge duct 46 (see FIGS. 6 and 15). Thereby, the posture of the fertilizer bag Z placed on the work table 77 positioned below the discharge duct 46 can be held substantially constant regardless of the increase in the fertilizer storage amount. As a result, it is possible to avoid the occurrence of a problem that the fertilizer bag Z placed on the work table 77 is deformed together with the storage of the granular fertilizer and falls from the work table 77.

  As shown in FIGS. 5 to 7, 14, and 15, the cover body 76 has an open posture while the closed posture is a right-down posture that covers the lower side in the transport direction of the transport direction changing unit 46 </ b> B from above. It is set to a substantially horizontal posture. As a result, the length of the cover body 76 extending outwardly to the right in the open posture can be increased with respect to the lower side in the transport direction of the transport direction changing unit 46B in the lower right posture. Thereby, the cover body 76 can be made to function more suitably as a rain guard that suppresses intrusion of rainwater and the like from the exhaust port 46Bb and the outlet 46C of the discharge duct 46 extending toward the right outer side of the vehicle body. .

  In this embodiment, the fertilizer supply path A is used for supplying the feed air from the blower 35 to each feeding mechanism 33 by the branch duct 41, the left supply duct 42, and the right supply duct 43 to be used for supplying fertilizer to the field. Is formed. Further, by the branch duct 41, the left supply duct 42, the relay duct 44, the recovery duct 45, and the discharge duct 46, the conveying air from the blower 35 bypasses each feeding mechanism 33 and the granular fertilizer remaining in the fertilizer 5. A fertilizer recovery path (powder body recovery path) B used for recovery is formed.

  As shown in FIGS. 1 to 6, 18, and 19, on the right side of the rear portion of the traveling vehicle body 1, a vertically swinging operation that supports a longitudinal support shaft 78 is possible, and a longitudinal support shaft is provided. A support arm 79 capable of sliding back and forth with respect to 78 is provided. The front-rear support shaft 78 is extended over a front support plate 80 and a rear support plate 81 provided on the right side of the rear frame 16 so as to face each other with a predetermined interval in the front-rear direction. The front and rear support shafts 78 and the front and rear support plates 80 and 81 are disposed so as to be positioned between the right auxiliary wheel 11 (rear wheel 10) and the fuel tank 20 in a side view. The support arm 79 is made of, for example, a round pipe steel material bent in an L shape, and extends from the support shaft 78 and passes between the auxiliary wheel 11 on the right side and the fuel tank 20, and the extension of the arm portion 79A. It is formed so as to include a support portion 79B that extends rearward from the protruding end. A work table 77 is welded to the support portion 79B of the support arm 79.

  In other words, the work platform 77 is cantilevered by an L-shaped support arm 79 extending from the rear frame 16 so as to bypass the right auxiliary wheel 11. Then, the storage arm and the use position can be changed by the up and down swinging operation of the support arm 79 supported by the longitudinal support shaft 78.

  The storage position of the work platform 77 is the same as the distance between the centers of the left and right auxiliary wheels 11 because the left and right widths of the fertilizer delivery part 5A mounted on the rear part of the traveling vehicle body 1 in the eight fertilizer application device 5 are It is set at an upper position close to the upper right end of the right auxiliary wheel 11. And the attitude | position of the work bench 77 in the retracted position is set to the non-mounting attitude | position which suppresses the protrusion to the vehicle body right outward. On the other hand, the working position of the work platform 77 is that the outlet 46C of the discharge duct 46 is located on the upper right side of the right auxiliary wheel 11, so that the right auxiliary wheel 11 is located outward from the outlet 46C. It is set at a lower position separated by a predetermined distance (appropriate distance considering the size of the fertilizer bag Z). And in the use position, since the attitude | position of the work bench | platform 77 is a mounting attitude | position, it comes to protrude rightward of the auxiliary wheel 11 of the right side.

  The non-mounting posture of the work bench 77 is a vertical posture or a substantially vertical posture that suppresses the right extension of the work bench 77 to the right. The mounting posture of the work table 77 is a horizontal posture or a substantially horizontal posture in which the fertilizer bag Z can be placed with good stability.

  As a result, the use position on the lower side where the work table 77 is projected outward from the traveling vehicle body 1 in a mounting posture in which the fertilizer bag Z can be mounted, and the amount of protrusion outward of the vehicle body from the use position is reduced. It is equipped so that the position can be changed at the upper storage position.

  The swing fulcrum portion 79C of the support arm 79 is formed in a U-shape including front and rear fitting pieces 79Ca and 79Cb that are externally fitted so as to be relatively rotatable and relatively slidable on a longitudinally supporting shaft 78. The front and rear fitting pieces 79Ca and 79Cb are provided with fitting through holes 79Cc. A front-rear-facing engagement pin 82 that is engaged with two upper and lower recesses 81A and 81B formed in the rear support plate 81 is fixed to the swing fulcrum 79C. The engagement pin 82 is separated from the rear support plate 81 by the forward sliding operation of the support arm 79 and allows the support arm 79 to swing up and down. Further, when the support arm 79 is pivoted up and down to face either of the upper and lower recesses 81A and 81B, the support arm 79 is allowed to slide backward. The work table 77 can be held in the retracted position by engaging the engaging pin 82 with the upper concave portion 81 </ b> A by sliding the support arm 79 backward. Further, by engaging the engaging pin 82 with the lower concave portion 81B, the work table 77 can be held at the use position.

  A state in which the support arm 79 swings and urges upward as the support arm 79 swings up and down while the support arm 79 slides and urges backward over the arm portion 79A of the support arm 79 and the rear support plate 81. And a toggle spring 83 that switches to a state of swinging and biasing downward. Then, by the action of the toggle spring 83, the engagement pin 82 can be switched and held between the state where it is engaged with the upper concave portion 81A and the state where it is engaged with the lower concave portion 81B.

  From the above configuration, after the support arm 79 is slid forward against the biasing force of the toggle spring 83, the support arm 79 is swung upward, and the engagement pin 82 is moved back by the biasing force of the toggle spring 83. By engaging with the concave portion 81 </ b> A on the upper side of the support plate 81, the work table 77 can be switched and held at the storage position. Further, after the support arm 79 is slid forward against the biasing force of the toggle spring 83, the support arm 79 is swung downward, and the engagement pin 82 is biased by the biasing spring 83 and the rear support plate 81 is moved. By engaging with the lower concave portion 81B, the work table 77 can be switched and held at the use position.

  As shown in FIGS. 3 to 6, 18, and 19, the work table 77 is provided in front of and behind the first member 77 </ b> A made of a round bar steel material formed in a loop shape having a rectangular shape in plan view provided with standing parts 77 </ b> Aa on the front and rear. The two second members 77B made of a round steel bar material formed in a loop shape having a rectangular shape in plan view provided with an upright portion 77Ba at the right end portion are welded in a state where they are placed and configured in a lattice shape. A receiving member 84 that receives the fertilizer bag Z placed on the work table 77 from the lateral side on the vehicle body side is provided at the left end portion of the work table 77. The receiving member 84 has a use posture that stands up with respect to the worktable 77 in the mounting posture by winding both ends of a round bar steel material bent in a U-shape around the left end 77Bb of each second member 77B. The retractable position along the work table 77 is configured to be switchable by swinging with the left end 77Bb of the front and rear second member 77B as a fulcrum. Then, both end portions 84A of the receiving member 84 are formed so as to function as contact portions that hold the receiving member 84 in a use posture by contact with the left end portion 77Ab of the first member 77A. Further, the standing portion 77Aa of the first member 77A is received so as to function as an engaging portion that holds the receiving member 84 in the retracted position by engaging with the free end portion 84B of the receiving member 84 switched to the retracted position. It is tilted to the stop member side.

  In the above configuration, when the work table 77 is held in the retracted position, the receiving member 84 is switched to the retracted position, and the free end portion 84B of the receiving member 84 is engaged with the standing portion 77Aa of the first member 77A. Accordingly, the receiving member 84 can be stably held in the retracted position standing along the work table 77 in the retracted position regardless of vibration during traveling. And when holding the work bench 77 in the use position and mounting the fertilizer bag Z, the fertilizer bag Z is made more stable by switching the receiving member 84 to the use posture and dripping the fertilizer bag Z. It can be placed on the work bench 77 in a state. In addition, the upright portions 77Aa and 77Ba of the work bench 77 and the receiving member 84 can reliably hold the bottom of the fertilizer bag Z on the work bench. In addition, since the work table 7 is configured in a lattice shape, the bottom of the storage bag Z partially enters between the first member 77A and the second member 77B together with the storage of the granular fertilizer in the storage bag Z. 7 is prevented from being displaced. As a result, the posture and position of the fertilizer bag Z placed on the work table 77 can be held substantially constant regardless of the increase in the amount of fertilizer stored, and the fertilizer bag Z placed on the work table 77 stores granular fertilizer. At the same time, it is possible to avoid the risk of deformation or movement and falling from the work table 77.

  When the work table 77 is held in the retracted position, the support arm 79 together with the work table 77 protrudes rightward from the right end of the right expansion step 18 and the fuel tank 20A of the fuel tank 20 and the right Contact between the oil supply cylinder 20A of the fuel tank 20 and the discharge duct 46 of the fertilizer application device 5 is located between the discharge duct 46 of the fertilizer application device 5 that protrudes rightward from the right end of the rear step 19. It is comprised so that it may function as a guard which suppresses.

  Further, in the state where the work table 77 is held at the use position, the work table 77 is located immediately behind the fuel tank 20A of the fuel tank 20, so that the work table 77 is provided with a fuel supply tank (not shown) for refueling. It can also be used as a work table to be placed.

  As shown in FIGS. 1 and 2, the work bench 77 protrudes from the right end of the spare seedling stage 23 to the right outward in the use position with respect to the right spare seedling stage 23 and reserves in the storage position. It is comprised so that it may be located in the vehicle body side rather than the right end of the seedling stand 23. Further, the seedling stage 31 is configured to be positioned on the vehicle body side of the right end of the seedling stage 31 regardless of the use position and the storage position. Further, for the right side auxiliary step 85 for getting on and off, which is disposed at the lower right of the right side expansion step 18, it protrudes outward from the right end of the auxiliary step 85 in the use position, and in the storage position, the auxiliary step 85. It is configured to be located on the vehicle body side from the right end.

  By the way, as shown in FIG. 20, in a riding rice transplanter configured to have a mid-mount fertilization specification for six strips, for example, having fewer work strips than eight strips, a six-strand fertilizer applied to the rear portion of the traveling vehicle body 1. 5 is shorter than the distance between the centers of the left and right auxiliary wheels 11. Therefore, when such a riding rice transplanter is equipped with the work platform 77 so that the position can be changed between the storage position and the use position, the length of the arm 79A in the support arm 79 is increased as shown in FIG. In the retracted position of the work table 77, the work table 77 may be positioned in a non-mounting posture directly above the auxiliary wheel 11 on the right side so as to be close to the fertilizer delivery unit 5A of the fertilizer application device 5.

  As shown in FIGS. 7 to 9, the fertilization transmission system 28 includes a rotary arm 86 that rotates integrally with the second transmission shaft 27 and a vertical movement that moves up and down by the rotation of the rotary arm 86. This is converted into a swing motion of the first swing arm 88 via the one linkage rod 87. Then, the feed amount adjusting mechanism 90 provided on the right side of the fertilizer frame 38 is used for the swing motion of the first swing arm 88 via the left and right transmission shaft 89 that also serves as the swing fulcrum of the first swing arm 88. The swing motion after the swing stroke amount is adjusted by the feed amount adjusting mechanism 90 is transmitted to the second swing arm 92 via the second linkage rod 91. The second swing arm 92 is connected to the right end portion of the feeding drive shaft 56 via a one-way clutch 59.

  As shown in FIG. 9, the feed amount adjusting mechanism 90 performs the swing motion of the swing arm 93 that swings integrally with the first swing arm 88 via the transmission shaft 89, and the balance arm 95 via the linkage rod 94. To communicate. Then, the swinging motion on the output side of the balance arm 95 is transmitted to the second swinging arm 92 via the second linkage rod 91. The balance arm 95 is configured such that the position of the swing fulcrum shaft 96 in the front-rear direction relative to the balance arm 95 can be changed. In addition, the swinging control arm 98 provided on the guide plate 97 that supports the swinging fulcrum shaft 96 so that the position of the swinging fulcrum shaft 96 can be changed allows the swinging stroke amount on the input side of the balance arm 95 to be changed regardless of the position change of the swinging fulcrum shaft 96. Limited to a certain amount. Thus, the swing stroke amount on the output side of the balance arm 95 can be adjusted in accordance with the position change of the swing fulcrum shaft 96 in the front-rear direction. Then, by adjusting the swing stroke amount on the output side of the balance arm 95 in this way, the rotation operation angle of the feeding roll 53 of the feeding mechanism 33 interlocked with the feeding drive shaft 56 is adjusted together with the rotation operation angle of the feeding drive shaft 56. It can be changed, and the fertilizer feed amount by the rotation of the feed roll 53 can be adjusted. The swinging fulcrum shaft 96 of the balance arm 95 can be arbitrarily changed in the front-rear position with respect to the balance arm 95 by rotating the operation tool 100 of the adjustment mechanism 99 configured in a screw feed type.

  As shown in FIGS. 9 and 21, the adjustment mechanism 99 of the feed amount adjustment mechanism 90 moves in the front-rear direction together with the swing fulcrum shaft 96 of the balance arm 95 in conjunction with the adjustment of the fertilizer feed amount by the operation tool 100. The pointer 101 is provided. A long hole 102 </ b> A serving as a movement path of the pointer 101 is formed on the upper surface of the cover 102 covering the feed amount adjusting mechanism 90. In addition, a scale that is engraved corresponding to the fertilizer feed amount that changes in accordance with the back and forth movement of the swing fulcrum shaft 96 of the balance arm 95 is shown along one side edge of the long hole 102A. That is, the fertilizer feed amount after adjustment by the feed amount adjustment mechanism 90 is displayed by the pointer 101 and the scale.

  By the way, the relationship between the forward / backward movement amount of the oscillating fulcrum shaft 96 and the fertilizer feed amount varies depending on the bulk specific gravity, which varies depending on the particle size of the granular fertilizer. As a scale indicating the feed amount of the granular fertilizer, granular fertilizer It is realistic to provide a plurality of types corresponding to different particle sizes depending on the type of the type. However, if a plurality of types of scales are arranged on the same surface and written, there is a risk that the scales used will be mistaken and the pointer 101 will be positioned at the wrong position.

  Therefore, the scale switching means 103 exemplified below may be adopted as a means for eliminating a scale error.

  As shown in FIGS. 22 and 23, the scale switching means 103 is configured so that the scale notation member 104 formed in a polygonal column shape (illustration triangular shape) on the upper surface of the cover 102 is in a lateral orientation along the long hole 102 </ b> A of the cover 102. The center of the display member 106 is arranged so as to be rotatable about the rotation axis P. A plurality of types of scales corresponding to different particle sizes depending on the type of granular fertilizer are individually described on each surface of the scale notation member 104. In addition, a holding mechanism (not shown) that enables the scale notation member 104 to be held in a predetermined or arbitrary rotational posture is provided.

  In other words, by rotating the scale notation member 104 in a rotation posture in which the pointer 101 can be easily aligned with the scale corresponding to the granular fertilizer to be used, there is a risk that the scale 101 to be used may be mistakenly set to the wrong position. It can be avoided in advance.

  Although illustration is omitted, a rectangular opening is formed on the upper surface of the cover 102 so that the scale notation surface of the scale notation member 104 can be selectively switched, and the scale notation member 104 is provided inside the cover 102. Also good.

[Second Embodiment]
Hereinafter, as an example of an embodiment for carrying out the present invention, a second embodiment in which the present invention is applied to a riding rice transplanter that is an example of an agricultural machine will be described with reference to the drawings. In addition, since this 2nd Embodiment differs in the support structure of fertilizer bag (an example of a collection container) Z from 1st Embodiment mentioned above, hereafter, only the support structure of the fertilizer bag Z is demonstrated based on drawing.

  As shown in FIGS. 24 to 26, in the second embodiment, a work table 77 is provided at the extended end of the support arm 79 extended from the fertilizer application frame 38. The work table 77 is configured by welding a plate-like member 77D that forms a mounting surface on the free end side of a swinging member 77C that is bent in a U-shape. The support arm 79 is connected to the extended end of the support arm 79 via a support shaft 105 facing forward and backward so that the posture can be switched between a non-mounting posture and a mounting posture by a swinging operation using the support shaft 105 facing the front and rear. It is. Further, it is possible to switch between the non-mounting posture and the mounting posture by the action of the toggle spring 106 installed over the swing member 77C and the support arm 79.

  The support arm 79 includes a first arm portion 79D made of a round pipe steel material bent in a U-shape, a second arm portion 79E made of front and rear square pipe steel materials, and the like. The first arm portion 79 </ b> D is supported by a support member 107 provided at the right rear portion of the fertilizer application frame 38. The second arm portion 79E is connected to the right end portion of the first arm portion 79D via a front-rear support shaft 79F so that a vertical swing operation using the front-rear support shaft 79F as a fulcrum is possible. is there. A work table 77 is connected to the free end of the second arm portion 79E. The free end of the second arm portion 79E is welded with a receiving plate 79Ea that receives and supports the swing member 77C in a state where the work table 77 is switched to the mounting posture. The longitudinally supporting shaft 79F is arranged and set so as to be positioned directly above the right auxiliary wheel 11 at the same height as the outlet 46C of the discharge duct 46 for discharging the collected granular fertilizer. The length of the second arm portion 79E is such that when the second arm portion 79E swings downward, the work table 77 is moved a predetermined distance downward from the outlet 46C to the right of the right auxiliary wheel 11 (the size of the fertilizer bag Z). It is set to a length that can be positioned at a lower position separated by an appropriate distance).

  From the above configuration, the second arm portion 79E is swung downward with the front and rear support shaft 79F as a fulcrum, and the work table 77 is switched to the mounting posture, so that the work table 77 in the mounting posture is moved to the right side. The auxiliary wheel 11 can be positioned at the use position on the lower side projecting outward to the right. In addition, the work table 77 is switched to the non-mounting posture, and the second arm portion 79E is swung upward with the support shaft 79F in the front-rear direction as a fulcrum, so that the work table 77 in the non-mounting posture is moved to the second position. It can be located in the upper storage position near the right end of the fertilizer delivery part 5A of the fertilizer applicator 5 by being positioned directly above the auxiliary wheel 11 together with the arm part 79E.

  In a state where the work bench 77 is located at the use position, the second arm 79E is configured to function as a receiving member 84 that receives the fertilizer bag Z placed on the work bench 77 from the lateral side on the vehicle body side. It is.

  On the right side surface of the cover 102 that covers the feed amount adjusting mechanism 90, a receiving tool 108 having an engaging recess 108A is provided. The second arm portion 79E is welded with a front-rear facing engagement pin 79Eb that engages with the engagement recess 108A when the work bench 77 is positioned at the retracted position. The receiver 108 engages with the engagement pin 79Eb engaged with the engagement recess 108A by the swinging operation with the support shaft 109 facing forward and backward, and the engagement pin 79Eb is detached from the engagement recess 108A. The engagement piece 110 can be switched between an engagement state for preventing the engagement and a release state for releasing the engagement with the engagement pin 79Eb. That is, the work table 77 can be held in the retracted position by engaging the engagement piece 110 with the engagement pin 79Eb engaged with the engagement recess 108A.

  In the second arm portion 79E, the position where the edge portion 79Ec on the swing fulcrum side of the second arm portion 79E contacts the first arm portion 79D is set as the lower limit position. At the right end of the first arm portion 79D, there is provided a swinging member 112 that swings around a support shaft 111 facing forward and backward. The swing member 112 is formed in a substantially T shape in the front-rear direction including a left arm portion 112A, a right arm portion 112B, and a linkage arm portion 112C. Then, over the second arm portion 79E and the linkage arm portion 112C of the swinging member 112, the second arm portion 79E swings upward and urges downward as the second arm portion 79E swings up and down. A toggle spring 113 that switches to a state of swinging and biasing is provided.

  Accordingly, when the second arm portion 79E is swung upward, first, the pulling action via the toggle spring 113 associated with this operation causes the swinging member 112 to be viewed from the front with the support shaft 111 facing forward and backward. It swings clockwise, and the left arm portion 112A of the swinging member 112 contacts the first arm portion 79D. The second arm 79 </ b> E is configured to oscillate upward by the pulling action of the toggle spring 113 generated after the contact. When the second arm 79E is swung downward, first, the swinging member 112 is pushed up via the toggle spring 113, and the swinging member 112 is turned to the left when viewed from the front with the support shaft 111 as a fulcrum. The right arm part 112B of the swinging member 112 contacts the first arm part 79D in a posture along the first arm part 79D. And it is comprised so that the impact at the time of the edge part 79Ec of the 2nd arm part 79E contacting 1st arm part 79D may be absorbed with the elasticity of the toggle spring 113 which generate | occur | produces after this contact.

    [Another embodiment]

[1] The farm work machine may be a riding rice transplanter, a direct sowing machine, or a tractor provided with any one or a plurality of powder supply devices such as a fertilizer application device, a chemical spraying device, and a seeding device. . Moreover, as a riding rice transplanter, you may provide the folding seedling planting apparatus 4 comprised so that the left-right width could reduce to a vehicle body width etc.

[2] The granular material supply device 5 may be a fertilizer application device that supplies powdered fertilizer, a chemical spraying device that supplies granular chemicals, a seeding device, or the like. Further, the blower 35 may be configured to be arranged on one side of the left and right sides of the traveling vehicle body 1. Further, the fan 35 may not be provided.

[3] The traveling vehicle body 1 may not be equipped with the auxiliary wheels 11. Also, but it may also be one obtained by deploying the engine 7 under the driver's seat 13.

[4] The granular material collection path B may be configured to collect the granular material under the natural flow of the granular material without using the conveying air from the blower 35. Moreover, what was comprised so that the air blower only for collection | recovery might be provided may be used. Furthermore, it may be configured independently of the powder supply path A.

[5] As the work table 77, the support arm 79 is swung back and forth with a vertical support shaft as a fulcrum, the support arm 79 is swung up and down with a left and right support shaft as a fulcrum, or horizontally It may be configured such that the position can be changed between the use position and the storage position by a sliding operation of the support arm 79. Further, a configuration in which the position can be changed between the use position and the storage position by a combination of the swing operation and the slide operation of the support arm 79 may be used. Further, it may be configured such that the position can be changed between the use position and the storage position by changing the use position and the storage position of the work table 77.

[6] The use position of the work table 77 can be variously changed according to the position of the outlet 46C of the powder collection path B. For example, when the outlet 46 </ b> C of the granular material collection path B is located on the left side of the traveling vehicle body 1, the use position of the work table 77 may be set to the left position of the traveling vehicle body 1. In addition, the storage position of the work table 77 can be variously changed according to the vehicle body structure and the like. For example, the storage position of the work bench 77 may be set to a position that covers the fuel tank 20 from the outside of the vehicle body.

[7] The work table 77 may be configured so that the height of the powder collection path B with respect to the outlet 46C can be adjusted at the use position.

[8] You may make it equip the work bench 77 with the receiving member 84 so that attachment or detachment is possible. Further, the work table 77 may be provided with a plurality of receiving members 84.

[9] The collection container Z may be a bag or a bucket other than the fertilizer bag.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a farming machine such as a riding rice transplanter, a direct sowing machine, or a tractor provided with any one or more of a granular material supply apparatus such as a fertilizer application apparatus, a chemical spraying apparatus, and a seeding apparatus. .

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 5 Powder supply apparatus 10 Rear wheel 11 Auxiliary wheel 20 Fuel tank 46C Outlet 77 Work bench 79 Support arm 84 Receiving member B Granule collection path Z Collection container

Claims (5)

Agricultural machine equipped with a powder recovery path that guides the powder remaining in the powder supply device to the outside of the traveling vehicle body and enables removal of the residual powder from the outlet at the end of the guide. There,
A working position where a work table on which a collection container storing residual powder and granular materials taken out from the take-out port is placed is projected to the outside of the traveling vehicle body in a placement posture capable of placing the collection container; and Equipped so that the position can be changed to the retracted position where the amount of overhang to the outside of the car body decreases from the use position ,
The use position is set on the vehicle body outer side of the auxiliary wheel arranged on the vehicle body outer side of the rear wheel,
An agricultural work machine configured to support the work table with a support arm that bypasses the rear wheel and the auxiliary wheel from the traveling vehicle body and extends to the use position . The farm work machine according to claim 1, wherein the support arm is L-shaped and cantilever-supports the work table .   The agricultural working machine according to claim 1 or 2, wherein the work table is equipped with a receiving member for receiving the collection container from the side.   The agricultural working machine according to claim 3, wherein the receiving member is configured to be switchable between a use posture standing with respect to the work table in a mounting posture and a storage posture along the work table.   The agricultural working machine according to any one of claims 1 to 4, wherein a fuel tank is provided at a position adjacent to the work table at the use position in the traveling vehicle body.

Images