JP2011200158A - Structure for recovery of granules in granule-feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for recovery of granules in a granule-feeding device, which can prevent the lowering of a recovery rate of remaining granules caused by the inflow of remaining granules and carrying air into a recovery container.SOLUTION: The structure recovery of granules in the granule-feeding device, equipped with a granule recovery route B enabling to carry the granules remaining in a storage portion with carrying air from a fan 35 and then take out the remaining granules from a takeout port 46C at a carrying final end, is characterized by disposing a carrying direction-changing portion 46B for changing the carrying direction to a downward direction at the carrying final end of the granule recovery route B and forming an exhaust port 46Bb for flowing out the carrying air on the upper side of the carrying direction-changing portion 46B.

Description

  The present invention conveys the granular material remaining in the storage part with the conveying air from the blower, and the granular material provided with the granular material recovery path that enables the removal of the residual granular material from the outlet at the conveying end It is related with the granular material collection structure of a body supply apparatus.

  In the granular material collection structure of the granular material supply device as described above, the residual granular material conveyed by the conveying air from the blower was configured to be discharged from the outlet at the conveying end together with the conveying air ( For example, see Patent Document 1).

JP 2005-185149 A

  In the above configuration, since the residual granular material is discharged from the take-out port together with the conveying wind, when a collection container such as a bag or a bucket is provided so as to receive the residual granular material from the take-out port, A conveyance wind will flow in with a residual granular material. Therefore, it becomes easy to cause the inconvenience that the residual granular material stored in the collection container is blown out from the collection container and scattered. As a result, there is a risk of inconvenience that the recovery rate of the residual granular material decreases.

  An object of the present invention is to prevent a reduction in the recovery rate of residual powder particles due to the conveyance air flowing into the recovery container together with the residual powder particles.

In the first problem solving means of the present invention, the granular material remaining in the storage section is conveyed by the conveying air from the blower, and the residual granular material can be taken out from the outlet at the conveying end. In the granular material collection structure of the granular material supply device provided with the collection path,
A conveyance direction changing unit for changing the conveyance direction downward is provided at the conveyance terminal portion of the granular material recovery path, and an exhaust port through which conveyance air flows out is formed on the upper side of the conveyance direction changing unit.

  According to this problem solving means, when the residual granular material conveyed by the conveying air from the blower reaches the conveying direction changing portion of the granular material collecting path, the conveying air flows out from the exhaust port of the conveying direction changing portion and remains. Residual granular material flows down the conveyance direction changing portion and the outlet flows out.

  In addition, by forming an exhaust port on the upper side of the transport direction changing unit that changes the transport direction downward, for example, compared to the case of forming an exhaust port on the lower side of the transport direction changing unit, The outflow of the conveyance air can be performed promptly.

  That is, it is possible to quickly separate the conveying air and the residual granular material from the outlet in the conveying direction changing section and to take out only the residual granular material from the outlet. Thereby, when a collection container such as a bag or a bucket for receiving the residual granular material from the outlet is provided, it is possible to prevent the conveying air from flowing into the collection container together with the residual granular material.

  As a result, it is possible to prevent the occurrence of inconvenience that the residual granular material stored in the recovery container is blown out from the recovery container and scattered due to the conveyance air flowing into the recovery container together with the residual powder. It is possible to prevent a reduction in the recovery rate of the residual granular material due to.

In the second problem solving means of the present invention, in the first problem solving means,
The exhaust port is equipped with a solid-gas separation member that prevents the passage of powder particles.

  According to this problem solving means, the outflow of the granular material from the exhaust port can be prevented by the solid-gas separation member. As a result, the recovery rate of the residual granular material can be improved.

In the third problem solving means of the present invention, in the first or second problem solving means,
A closing member capable of closing the exhaust port is provided.

  According to this problem solving means, when the residual granular material is not collected, it is possible to prevent intrusion of rainwater or the like from the exhaust port by closing the exhaust port with the closing member. Thereby, when recovering the residual granular material, it is possible to avoid the possibility that the residual granular material adheres to the conveyance direction changing portion and is clogged due to rainwater or the like entering from the exhaust port.

  Therefore, it is possible to improve the working efficiency when collecting the residual granular material.

In the fourth problem solving means of the present invention, in the third problem solving means,
In the state where the exhaust port is opened, the blocking member serves as a rain guard that prevents rainwater from entering the exhaust port.

  According to this problem solving means, when the residual granular material is collected, the blocking member serves as a rain guard, so that it is possible to prevent intrusion of rainwater or the like from the exhaust port during the collection operation of the residual granular material. As a result, it is possible to avoid the possibility that the residual granular material adheres to the transport direction changing portion and becomes clogged due to the intrusion of rainwater or the like from the exhaust port during the recovery operation of the residual granular material.

  Therefore, it is possible to improve the working efficiency when collecting the residual granular material.

According to a fifth problem solving means of the present invention, in the third or fourth problem solving means,
The end of the closing member on the upper side in the conveying direction is fixed, and the end of the closing member can be switched between a closing posture for closing the exhaust port and an opening posture for opening the opening with the end on the upper side in the conveying direction as a fulcrum. To configure
A fixing tool for fixing the blocking member in the open posture is provided at a conveyance end portion of the conveyance direction changing unit.

  According to this problem solving means, the operation of the closing member when switching between the state of closing the exhaust port and the state of opening the exhaust port can be easily performed. In addition, the fixing operation and the fixing release operation in the opening posture of the closing member by the fixing tool can be easily performed.

  This is because the transfer end of the powder collection path is a residual powder take-out section, which is arranged outside the powder supply device to facilitate the receipt of the taken-out residual powder. Therefore, the transport direction changing unit provided at the transport terminal is also located on the outside of the powder supply device. In addition, in this problem solving means, the exhaust of the transport direction changing unit is provided. The operation side of the closing member when opening and closing the opening is the lower side in the conveying direction of the closing member, and the fixing member of the closing member is arranged at the conveying terminal end of the conveying direction changing unit, so that the operating side of the closing member and the closing member This is because the fixture is further located on the outside of the powder and particle supply device.

  As a result, it is possible to improve the operability when switching between the state in which the residual granular material is recovered and the state in which it is not recovered.

According to a sixth problem solving means of the present invention, in the fifth problem solving means,
The fixing tool is configured to be able to support a collection container for storing powder particles taken out from the outlet.

  According to this problem solving means, it is possible to support the recovery container in a state suitable for storing the granular material taken out from the outlet without providing a dedicated support for supporting the recovery container.

  Therefore, it is possible to improve workability when collecting the residual granular material in the collection container while simplifying the configuration.

In a seventh problem solving means of the present invention, in any one of the above third to sixth problem solving means,
A lid capable of closing the outlet is formed integrally with the closing member.

  According to this problem solving means, it is possible to prevent intrusion of rainwater or the like from the outlet without separately providing a lid for closing the outlet. Thereby, when recovering the residual granular material, it is possible to avoid the possibility that the residual granular material adheres to the transport direction changing portion and is clogged due to rainwater or the like entering from the outlet. Moreover, the exhaust port and the outlet can be opened and closed in a lump.

  Therefore, it is possible to improve the working efficiency when collecting the residual granular material.

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 of granular fertilizer. It is a right view of the principal part which shows the collection state of granular fertilizer. It is a vertical front view of the principal part which shows the non-recovery state of a granular fertilizer. It is a vertical front view of the principal part which shows the collection state of granular fertilizer. 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 granular fertilizer 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 structures, such as a work table. It is a disassembled perspective view of the principal part which shows structures, such as a work table. It is a vertical front view of the principal part which shows another structures, such as a work table. 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.

  Hereinafter, as an example of an embodiment for carrying out the present invention, an embodiment in which the granular material collection structure of the granular material supply apparatus according to the present invention is applied to a riding rice transplanter that is an example of a work vehicle will be described with reference to the drawings. To do.

  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.

  Power for planting work taken out from the T / M case 8 is transmitted to the seedling planting device 4 through a planting transmission system 26 constituted by a first transmission shaft 25 and the like arranged in the front-rear direction at the lower part of the traveling vehicle body 1. It is. 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. The fertilizer delivery unit 5A has a predetermined amount from the hopper 34, which is a storage unit that stores granular fertilizer that is an example of a granular material, with four feeding mechanisms 33 operating by power for fertilization from the T / M case 8. The granular fertilizer is fed out, and the fed granular fertilizer is put on the conveying wind generated by the electric blower 35 and sent out to the fertilizer guide section 5B. 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. 9]. 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. A rectangular perforated plate (an example of the solid-gas separation member 75) 75 configured to prevent the passage of the granular fertilizer by forming a large number of vent holes 75a having a diameter smaller than the particle size of the granular fertilizer is provided. The porous surface portion 75A in which a large number of holes are formed is deployed in a state of being fitted into the bulging portion 46Ba so as to face the exhaust port 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 (an example of the solid-gas separation member 75) 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 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 (an example of a closing member 76) 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. A cap portion (an example of a lid body 76B) 76B that is substantially D-shaped in a side view and closes the outlet 46C is integrally formed at the right end portion of the cover portion 76A. 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 of the cover portion 76 </ b> A. At the lower part of the cap portion 76B, the second locking projection 46F suspended from the right end of the discharge duct 46 or the third locking projection (an example of the fixture 46G) 46G standing at the right end of the discharge duct 46 A second locking ring 76D to be fitted 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.

  That is, the work bench 77 is cantilevered by an L-shaped support arm 79 extending from the rear frame 16 so as to bypass the right rear wheel 10 and the 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 FIG. 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 amount of forward and backward movement 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. 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.

    [Another embodiment]

[1] The granular material supply device 5 may be a fertilizer application device that supplies powdered fertilizer, a chemical spraying device that supplies granular chemicals, or a seeding device. 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.

[2] The granular material collection path B may be configured to include a dedicated blower for collection. Further, it may be configured independently of the powder supply path A.

[3] The transport direction changing unit 46B may be configured such that the exhaust port 46Bb is formed in a labyrinth shape to prevent the powder particles from flowing out from the exhaust port 46Bb.

[4] The conveyance direction angle that is changed downward in the conveyance direction changing unit 46 </ b> B can be variously changed according to the configuration, installation position, and the like of the granular material supply device 5.

[5] A dedicated support portion for locking and supporting the collection container Z may be provided at the conveyance end portion of the conveyance direction changing portion 46B.

[6] The closing member 76 and the lid 76B may be provided separately.

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

  The granular material collection structure of the granular material supply apparatus according to the present invention is a fertilizer application apparatus configured to be able to collect and extract a granular material such as a fertilizer, a medicine, or a seed using a conveying air from a blower. It can be applied to a medicine spraying device or a seeding device.

34 Storage Unit 35 Blower 46B Conveyance Direction Changing Unit 46Bb Exhaust Port 46C Outlet 46G Fixing Tool 75 Solid-gas Separating Member 76 Closure Member 76B Lid B Granule Collection Path Z Collection Container

Claims (7)

A granular material supply apparatus equipped with a granular material recovery path that conveys the granular material remaining in the storage section with the conveying air from the blower and enables the removal of the residual granular material from the outlet at the conveyance end. It is a granular material collection structure,
A granular material supply comprising a conveying direction changing unit that changes a conveying direction downward at a conveying terminal part of the granular material recovery path, and an exhaust port for discharging conveying air is formed on the upper side of the conveying direction changing unit. The granular material collection structure of the device.   The granular material collection structure of the granular material supply apparatus according to claim 1, wherein the exhaust port is equipped with a solid-gas separation member that prevents passage of the granular material.   The granular material collection structure of the granular material supply apparatus according to claim 1, further comprising a closing member capable of closing the exhaust port.   The granular material of the granular material supply apparatus according to claim 3, wherein the blocking member is configured to prevent rain from entering the exhaust port in a state where the exhaust port is opened. Collection structure. The end of the closing member on the upper side in the conveying direction is fixed, and the end of the closing member can be switched between a closing posture for closing the exhaust port and an opening posture for opening the opening with the end on the upper side in the conveying direction as a fulcrum. To configure
The granular material collection | recovery structure of the granular material supply apparatus of Claim 3 or 4 which has arrange | positioned the fixing tool which fixes the said obstruction | occlusion member in the said open attitude | position to the conveyance termination | terminus part of the said conveyance direction change part.   The granular material collection structure of the granular material supply apparatus according to claim 5, wherein the fixture is configured to be able to support a collection container for storing the granular material taken out from the outlet.   The granular material collection structure of the granular material supply apparatus according to any one of claims 3 to 6, wherein a lid capable of closing the outlet is integrally formed with the closing member.

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