JP6504835B2 - Paddy work machine - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a paddy field work machine in which a granular material feeder is disposed at the rear of a traveling vehicle body provided with an engine and a rear step.

  As the above-mentioned paddy field work machine, a blower (blower) located below the driver's seat to generate a conveying wind and a granular material (granular fertilizer) conveyed by the conveying wind are provided in the granular material feeding device. Powdered by conveying air, using a guiding part (fertilizer guiding part) to guide and an air intake duct that extends from the vicinity of the engine to the air intake of the blower and using high temperature dry air around the engine for conveying air There is one configured to promote the transportation of particles (see, for example, Patent Document 1).

  In addition, a blower that is positioned above the rear step (auxiliary step) in the powder and granular material supply device (fertilizer) and generates a conveying wind, and a guide unit that guides the granular material (fertilizer) conveyed by the conveying wind. (Supply hose) There are some which are provided (for example, refer to patent documents 2).

JP, 2011-200158, A (paragraph number 0039, 0053, FIG. 1, 2) JP, 2009-178080, A (paragraph number 0020, 0022, FIG. 1, 3, 4)

  In the former configuration (the configuration described in Patent Document 1), although conveyance of the powder particles can be promoted, the blower and the intake duct are difficult to assemble and maintain because the blower is positioned below the driver's seat. It had become.

  In the latter configuration (the configuration described in Patent Document 2), the blower is located above the rear step, which facilitates the assembly and maintenance of the blower. However, since the outside air dried at a high temperature around the engine is not used for the conveying air, there is a possibility that the particulate matter gets wet in the paddy field and easily adheres to the guide surface of the guide portion. Therefore, there is room for improvement in promoting the transportation of the powder and granular material.

  SUMMARY OF THE INVENTION The object of the present invention is to provide a paddy field work machine in which a granular material supply apparatus capable of promoting the transportation of granular material and easily performing installation and maintenance of a blower and an intake duct is disposed at the rear of a traveling vehicle. It is.

In the solution means of the present invention,
A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The lower duct portion extends from the lower end of the vertical duct portion in the front direction and the laterally inward direction of the traveling vehicle body.
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct.

  According to this means, it is possible to use the air dried at high temperature around the engine for the conveying air, while adopting a configuration in which the blower is disposed above the rear step to facilitate assembly and maintenance of the blower, It is possible to accelerate the transport of the powder and granular material by the transport wind.

  In addition, the intake duct limits the tread of the aft step while the blower is positioned above the aft step by bypassing the aft step and passing near the engine and the blower intake. Can be suppressed. Thereby, replenishment of the granular material to the granular material supply apparatus using the tread surface of the rear step can be performed comfortably without being hindered by the intake duct.

  Further, by providing the connecting portion in the vertically oriented duct portion of the intake duct, the lower duct portion side of the intake duct disposed below the rear step and the upper duct portion side of the intake duct disposed above the rear step It is easy to connect and disconnect. As a result, assembly and maintenance of the intake duct can be facilitated.

According to another solution of the present invention,
A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The lower duct portion extends from the lower end of the vertical duct portion in the front direction and the laterally inward direction of the traveling vehicle body.
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
In the connection portion, a downward outer fitting portion provided at the connection end portion at the upper duct portion side is externally fitted to an upward inner fitting portion provided at the connection end portion at the lower duct portion side.

  According to this means, it is possible to use the air dried at high temperature around the engine for the conveying air, while adopting a configuration in which the blower is disposed above the rear step to facilitate assembly and maintenance of the blower, It is possible to accelerate the transport of the powder and granular material by the transport wind.

  In addition, the intake duct limits the tread of the aft step while the blower is positioned above the aft step by bypassing the aft step and passing near the engine and the blower intake. Can be suppressed. Thereby, replenishment of the granular material to the granular material supply apparatus using the tread surface of the rear step can be performed comfortably without being hindered by the intake duct.

  Further, by providing the connecting portion in the vertically oriented duct portion of the intake duct, the lower duct portion side of the intake duct disposed below the rear step and the upper duct portion side of the intake duct disposed above the rear step It is easy to connect and disconnect. As a result, assembly and maintenance of the intake duct can be facilitated.

  In the connection portion, the downward outer fitting portion on the upper duct portion side is externally fitted to the upward inner fitting portion on the lower duct portion side, so that the lower duct portion side and the upper duct portion side of the intake duct It is possible to easily and reliably perform connection at the connection portion with the connection portion without using a dedicated component for connection. In addition, it is possible to effectively suppress the entry of wash water from the connection to the intake duct at the time of car washing with high-pressure wash water.

According to another solution of the present invention,
A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
The blower is disposed at the left and right end portions of the rear step, and the vertically oriented duct portion is disposed laterally outside the rear step at the same left and right end portions as the blower.
The lower duct portion includes a transverse duct portion extending from the vertical duct portion to the inside of the vehicle body,
The inboard portion and the outboard portion of the laterally oriented duct portion are separably connected to the laterally oriented duct portion, and a connection of an auxiliary duct portion between the inboard portion and the outward portion is enabled. Connection for adjusting the length of the
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The laterally oriented duct portion of the lower duct portion extends from the lower end of the vertically oriented duct portion in the laterally inward direction of the traveling vehicle body .

  According to this means, it is possible to use the air dried at high temperature around the engine for the conveying air, while adopting a configuration in which the blower is disposed above the rear step to facilitate assembly and maintenance of the blower, It is possible to accelerate the transport of the powder and granular material by the transport wind.

  In addition, the intake duct limits the tread of the aft step while the blower is positioned above the aft step by bypassing the aft step and passing near the engine and the blower intake. Can be suppressed. Thereby, replenishment of the granular material to the granular material supply apparatus using the tread surface of the rear step can be performed comfortably without being hindered by the intake duct.

  Further, by providing the connecting portion in the vertically oriented duct portion of the intake duct, the lower duct portion side of the intake duct disposed below the rear step and the upper duct portion side of the intake duct disposed above the rear step It is easy to connect and disconnect. As a result, assembly and maintenance of the intake duct can be facilitated.

  By the way, in the rear step, the width of the rear step is made to correspond to the working width (the number of working strips) of the paddy field work machine, in order to make it easy to replenish the powder to the granular material feeder using the rear step. ing. Therefore, the width of the rear step differs depending on the working width of the paddy field work machine. That is, it is necessary to adjust the length of the sideways duct portion in the intake duct according to the working width of the paddy field work machine.

  Therefore, in this means, the laterally oriented duct portion is provided with a connection portion for adjusting the length, and the length adjustment of the laterally oriented duct portion by attaching and detaching the auxiliary duct portion between the inboard portion and the outboard portion of the laterally oriented duct portion It is possible. Accordingly, it is possible to double the intake duct for the paddy field work machine having different work width (the number of work bars). And, by sharing the intake duct, it is possible to reduce the mold cost and to facilitate the part management.

According to another solution of the present invention,
A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
In the connection portion, the downward fitting portion provided at the connection end portion at the upper duct portion side is externally fitted to the upward inner fitting portion provided at the connection end portion at the lower duct portion side,
The blower is disposed at the left and right end portions of the rear step, and the vertically oriented duct portion is disposed laterally outside the rear step at the same left and right end portions as the blower.
The lower duct portion includes a transverse duct portion extending from the vertical duct portion to the inside of the vehicle body,
The inboard portion and the outboard portion of the laterally oriented duct portion are separably connected to the laterally oriented duct portion, and a connection of an auxiliary duct portion between the inboard portion and the outward portion is enabled. Connection for adjusting the length of the
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The laterally oriented duct portion of the lower duct portion extends from the lower end of the vertically oriented duct portion in the laterally inward direction of the traveling vehicle body .

  According to this means, it is possible to use the air dried at high temperature around the engine for the conveying air, while adopting a configuration in which the blower is disposed above the rear step to facilitate assembly and maintenance of the blower, It is possible to accelerate the transport of the powder and granular material by the transport wind.

  In addition, the intake duct limits the tread of the aft step while the blower is positioned above the aft step by bypassing the aft step and passing near the engine and the blower intake. Can be suppressed. Thereby, replenishment of the granular material to the granular material supply apparatus using the tread surface of the rear step can be performed comfortably without being hindered by the intake duct.

  Further, by providing the connecting portion in the vertically oriented duct portion of the intake duct, the lower duct portion side of the intake duct disposed below the rear step and the upper duct portion side of the intake duct disposed above the rear step It is easy to connect and disconnect. As a result, assembly and maintenance of the intake duct can be facilitated.

  In the connection portion, the downward outer fitting portion on the upper duct portion side is externally fitted to the upward inner fitting portion on the lower duct portion side, so that the lower duct portion side and the upper duct portion side of the intake duct It is possible to easily and reliably perform connection at the connection portion with the connection portion without using a dedicated component for connection. In addition, it is possible to effectively suppress the entry of wash water from the connection to the intake duct at the time of car washing with high-pressure wash water.

  By the way, in the rear step, the width of the rear step is made to correspond to the working width (the number of working strips) of the paddy field work machine, in order to make it easy to replenish the powder to the granular material feeder using the rear step. ing. Therefore, the width of the rear step differs depending on the working width of the paddy field work machine. That is, it is necessary to adjust the length of the sideways duct portion in the intake duct according to the working width of the paddy field work machine.

  Therefore, in this means, the laterally oriented duct portion is provided with a connection portion for adjusting the length, and the length adjustment of the laterally oriented duct portion by attaching and detaching the auxiliary duct portion between the inboard portion and the outboard portion of the laterally oriented duct portion It is possible. Accordingly, it is possible to double the intake duct for the paddy field work machine having different work width (the number of work bars). And, by sharing the intake duct, it is possible to reduce the mold cost and to facilitate the part management.

As one of the means for making the present invention more suitable,
The outer fitting portion is provided with an elastically deformable extension piece extending from an end edge of the outer fitting portion in a fitting direction to the inner fitting portion, and an engagement hole is formed in the extension piece,
The inner fitting portion is formed with a projection that engages with the engagement hole in a state of being fitted to the outer fitting portion.

  According to this means, the inner fitting portion and the outer fitting portion of the connection portion provided in the vertical duct portion of the intake duct can be fitted easily and reliably with an appropriate fitting length.

As one of the means for making the present invention more suitable,
Extending left and right handrail members disposed adjacent to left and right ends of the rear step from the vehicle body frame of the traveling vehicle body,
A powdery material delivery unit including the blower and the intake duct are attached to the handrail member.

  According to this means, by attaching the particulate matter delivery unit and the intake duct to the same handrail member, alignment between the blower and the intake duct of the particulate matter delivery unit to be connected after the attachment becomes easy to perform. As a result, it becomes easy to connect the blower of the granular material delivery unit and the intake duct.

As one of the means for making the present invention more suitable,
The intake section includes an internally fitted portion which is internally fitted to the blower side end of the intake duct, and a rubber fitting member externally fitted to the blower side end is externally fitted.
In the inner circumferential surface of the fitting member, an endless engagement groove is formed along the circumferential direction of the fitting member,
The blower side end portion is formed with an endless ridge engaged with the engagement groove in a fitted state with the fitting member.

  According to this means, the rubber fitting member can improve the sealing performance between the intake portion of the blower and the blower side end of the intake duct. Further, in the fitting state between the blower side end of the air intake duct and the fitting member, the rib of the blower side end engages with the engagement groove of the fitting member, whereby the air intake portion of the blower and the air intake duct are engaged. The sealability with the blower side end of the above can be further enhanced. Thus, air leakage from between the intake portion of the blower and the blower side end portion of the intake duct can be more reliably prevented.

  Then, the rubber fitting member functioning as the seal member is externally fitted to the blower side end of the intake duct externally fitted to the inner fitting portion of the intake portion, whereby the blower of the intake duct and the intake duct are fitted. As compared with the case where the seal member is interposed between the side end and the side end, the assembly confirmation of the fitting member (seal member) can be easily performed, and the assembly forgetting of the fitting member (seal member) is made more reliable. Can be prevented.

It is a left view of a riding rice transplanter. It is a top view of a riding rice transplanter. It is a rear view of the principal part which shows the structure of a fertilization apparatus. It is a left side view of the principal part which shows the composition of the rear upper part of a run vehicle body, and a fertilization device. It is a longitudinal front view of an important section showing composition etc. of an air intake duct (for six lines). It is a schematic plan view of the principal part which shows the composition etc. of an air intake duct (for six lines). It is a cross-sectional top view of the principal part which shows a fertilizer delivery unit, a structure of an air intake duct, etc. It is a schematic plan view of the principal part which shows the structure of a fertilization apparatus. It is an exploded right side view of the intake duct upper part side which shows the composition of the 1st duct part and the 2nd duct part. It is a disassembled front view of the upper part side of the air intake duct which shows the composition of the 1st duct part, the 2nd duct part, and the 3rd duct part. It is a partial longitudinal elevation view of the principal part which shows the structure of the 2nd connection part (connection part for length adjustment) of an air intake duct (for 6 lines). It is a cross-sectional top view of the principal part which shows the structure of the 2nd connection part (connection part for length adjustment) of an air intake duct (for 6 lines). It is a top view of the 3rd duct part which shows the composition of the 3rd duct part. It is a partial longitudinal elevation view of the 3rd duct part which shows the composition of the 3rd duct part. It is a top view of the 4th duct part which shows the composition of the 4th duct part. It is a left view of the 4th duct part which shows the composition of the 4th duct part. It is a partial longitudinal left side view of the principal part which shows the structure of the connection part of an air intake duct and a blower. It is a longitudinal front view of an important section showing composition of an air intake duct changed in specification for eight lines. It is a disassembled front view of the upper part side of the air intake duct which shows the composition of the air intake duct changed in specification for eight lines. It is a bottom view of the back step which shows the compression part etc. which form the penetration for the support | pillar part penetration in a back step. It is a longitudinal front view of the back step which shows the compression part etc. which form the penetration for the support | pillar part penetration in a back step. In an alternative embodiment in which the second duct part of the intake duct can be used for both six and eight lines, the upper part of the intake duct shows an example of use of the second duct part when the intake duct is configured for eight lines FIG. In an alternative embodiment in which the second duct component of the intake duct can be used for both six and eight lines, the upper side of the intake duct shows an example of use of the second duct component when the intake duct is configured for six lines FIG.

  Hereinafter, as an example of a mode for carrying out the present invention, an embodiment in which the present invention is applied to a riding rice planter which is an example of a paddy field work machine will be described based on the drawings.

In addition, the direction which the arrow of the code | symbol F described in FIG. 1 points is the front side of a riding rice transplanter, and the direction which the arrow of a code | symbol U points is the upper side of a riding rice transplanter.
Further, the direction indicated by the arrow of symbol F described in FIG. 2 is the front side of the riding rice transplanter, and the direction indicated by the arrow of symbol R is the right side of the riding rice transplanter.

  As shown in FIGS. 1 and 2, the riding rice transplanter illustrated in the present embodiment is vertically swung by the operation of the hydraulic lifting cylinder 2 at the rear of the traveling vehicle body 1 configured in a riding-type four-wheel drive type. The parallel quadruple link type link mechanism 3 is connected. The rear end lower portion of the link mechanism 3 is connected to a seedling planting device 4 for six rows, which is an example of the working device A. As a result, a six-row planting rice transplanter is configured with the six-row seedling planting device 4 movably up and down at the rear of the traveling vehicle body 1. In addition, by arranging the fertilization device 5 for six rows, which is an example of the granular material supply device B, at the rear of the traveling vehicle body 1, the riding rice planter for six-row planting is configured to the mid mount fertilization specification .

  As shown in FIGS. 1 to 3, in the traveling vehicle body 1, an air-cooled engine 7 is mounted at the left and right center of the front of the vehicle body frame 6 in order to stabilize the left-right balance of the vehicle body. The motive power from the engine 7 is used as an auxiliary transmission in a belt type transmission 8, a hydrostatic stepless transmission 9 provided as a main transmission, and a transmission case (hereinafter referred to as a T / M case) 10. It is transmitted to the left and right front wheels 11 and the left and right rear wheels 12 via a built-in gear type transmission (not shown) or the like. Further, the power for planting operation taken out from the T / M case 10 is transmitted to the seedling planting device 4 through the first transmission mechanism 13 for planting operation. Furthermore, the power for fertilization operation taken out from the T / M case 10 is transmitted to the fertilizer application device 5 through the second transmission mechanism 14 for fertilization operation.

  As shown in FIGS. 1, 2 and 4 to 6, the traveling vehicle body 1 includes a riding operation unit 15, left and right spare seedling placement units 16, a rear step 17, and the like. The boarding operation unit 15 includes a boarding step 18, a steering wheel 19 for front wheel steering, a driver's seat 20 and the like, and is disposed on the front-rear central side of the traveling vehicle body 1. The left and right spare seedling placement units 16 are distributed and disposed at the left and right ends of the front portion of the traveling vehicle body 1. Then, the left and right spare seedling placing units 16 are configured to place three mat-like seedlings. The rear step 17 is disposed above the link mechanism 3 and the left and right rear wheels 12 so that the tread surface is higher than the tread surface of the boarding step 18. Thereby, the rear step 17 can be used as a step when performing a seedling replenishment operation or the like for replenishing the mat-like seedlings of the reserve seedling placing unit 16 to the seedling planting device 4.

  As shown in FIGS. 1, 2 and 4 to 7, the traveling vehicle body 1 extends from the vehicle body frame 6 the left and right handrail members 21 disposed adjacent to the left and right ends of the rear step 17. The left and right handrail members 21 are bent forward and backward extending forward and backward from the vehicle body frame 6 to the lateral outside of the traveling vehicle body 1 and forward and backward from the left and right directional extending portions 21A. And an upward and downward extension 21C extending over the front and rear upward extensions 21B. As a result, the left and right handrails 21 move in and out of the boarding operation unit 15 in the lateral direction of the vehicle body, move from the boarding operation unit 15 to the rear step 17, move from the rear step 17 to the boarding operation unit 15, etc. When done, it is configured to be used as a handrail.

  The left and right handrail members 21 connect the front and rear upward extending portions 21 </ b> B by the front and rear direction reinforcing members 22. Further, the left and right handrail members 21 connect the rear upward extending portions 21 B by a connecting member 23. Thus, the left and right handrail members 21 are configured to have higher strength and shape retention.

  As shown in FIG. 1 and FIG. 2, the seedling planting device 4 comprises three leveling floats 25, a seedling platform 26 for six rows, a lateral feed mechanism 27, and a longitudinal feed on a planting frame 24 forming its framework. The mechanism 28 and the six planting mechanisms 29, etc. are assembled to construct a maximum of six rows of seedlings. Each leveling float 25 has a T-shape in plan view, and slides the field along with the traveling of the traveling vehicle body 1 in a working state in which each leveling float 25 is grounded. By this sliding, each ground preparation float 25 levels a field muddy surface such as a planting planned planned area. The seedling platform 26 is configured to place a maximum of six rows of mat-like seedlings in a guideable manner downward. The crossfeed mechanism 27 operates with power for planting work from the traveling vehicle body 1. By this operation, the lateral feed mechanism 27 reciprocates the seedling platform 26 in the left and right direction with a constant stroke corresponding to the width of the mat-like seedling. The vertical feed mechanism 28 operates in conjunction with the cross feed mechanism 27 each time the seedling stage 26 reaches the left and right stroke ends. By this operation, the vertical feed mechanism 28 operates the six vertical feed belts 28A each time the seedling platform 26 reaches the left and right stroke ends, and the seedling platform 26 with each mat-like seedling on the seedling platform. Vertically feed at a predetermined pitch toward the lower end of the. Each planting mechanism 29 operates with power for planting work from the traveling vehicle body 1. By this operation, each planting mechanism 29 cuts out a predetermined amount of each seedling from the lower end of each mat-like seedling placed on the seedling platform 26 and plant it in the field mud after leveling.

  As shown in FIGS. 1 to 8, the fertilizer application device 5 includes a fertilizer delivery unit 30, which is an example of the particulate material delivery unit B1, and a guide portion 31 for guiding granular or powdery fertilizer from the fertilizer delivery unit 30 to the field. And the fertilization frame 32 which supports the fertilizer delivery unit 30, etc. are provided.

  The fertilizer delivery unit 30 is provided with a horizontally long hopper 33 for storing six rows of fertilizer, four delivery mechanisms 34, an electric blower 35, and the like. The hopper 33 is disposed above the rear step 17 together with the feeding mechanism 34 and the blower 35 in a state where the left and right centers thereof coincide with the left and right centers of the traveling vehicle body 1. Then, at the lower end portion of the hopper 33, four fertilizer discharge portions 33A are provided side by side at regular intervals in the left-right direction. Each feeding mechanism 34 is configured to be switchable between a single-row feeding state in which one row of fertilizer is fed and a two-row feeding state in which two rows of fertilizer are fed. Then, the upper end portion of each feeding mechanism 34 is connected to the corresponding fertilizer discharge portion 33A of the hopper 33. Further, the upper portions of the feeding mechanisms 34 aligned left and right by this connection are connected by a connecting frame 36 that spans four feeding mechanisms 34. Then, among the four feeding mechanisms 34 arranged in the left and right, the two feeding mechanisms 34 located on the left and right center sides are in a single-row feeding state, and the two feeding mechanisms 34 located in the left and right ends are in a two-row feeding state By doing this, the four feeding mechanisms 34 are configured to feed out six rows of fertilizer. Each feeding mechanism 34 operates with power for fertilization work from the traveling vehicle body 1. By this operation, each feeding mechanism 34 feeds a predetermined amount of fertilizer downward from the corresponding fertilizer discharging part 33A of the hopper 33 by a predetermined amount, and supplies it to the fertilizer unloading part 34A provided at the lower part of each feeding mechanism 34. Do. The blower 35 is bolted to the left end of the connecting frame 36. Thus, the blower 35 is disposed at the left end of the rear step 17. The blower 35 operates with the power from the traveling vehicle body 1 to generate a carrier wind. The carrier air from the blower 35 is supplied to the fertilizer unloading portion 34A of each feeding mechanism 34 via the horizontally-oriented air supply duct 37 and the like.

  The guide portion 31 includes a total of six fertilization hoses 38 which are extended by a predetermined number from the fertilizer discharge portion 34A of each delivery mechanism 34 according to the delivery state of each delivery mechanism 34, and the extension end of each fertilization hose 38. It consists of a total of six connected groovers 39 and the like. Each fertilization hose 38 guides the fertilizer conveyed from the fertilizer discharge part 34A of each delivery mechanism 34 to the corresponding groover 39 by the conveyance wind. Each groove ditch 39 is provided on each of the land adjustment floats 25 so as to form a fertilization ditch in the vicinity in the lateral direction with respect to the seedling planting place of each planting mechanism 29 in the field mud when the land adjustment floats 25 slide. It is equipped individually. Then, each grooved groove 39 guides the fertilizer guided by the corresponding fertilization hose 38 to the fertilization groove.

  The fertilization frame 32 supports the fertilizer delivery unit 30 by the left and right support portions 32A extending from the vehicle body frame 6 to the connection frame 36 of the fertilizer delivery unit 30. The left and right support columns 32A penetrate a rear step 17 located between the vehicle body frame 6 and the fertilizer delivery unit 30. Thereby, the support of the fertilizer delivery unit 30 by the fertilization frame 32 is compared with the case where the left and right support portions 32A are formed so as to extend from the vehicle body frame 6 to the connecting frame 36 of the fertilizer delivery unit 30 bypassing the rear step 17. Can be performed in a more rigid state with good stability.

  The fertilizer delivery unit 30 includes an air passage switching unit 40 between the blower 35 and the air supply duct 37. The air path switching unit 40 is connected to the left end of the left-right recovery duct 41 disposed parallel to the air supply duct 37. The air passage switching unit 40 is configured to be switchable between a fertilization state in which the air from the blower 35 is supplied to the air supply duct 37 and a fertilizer recovery state in which the air from the blower 35 is supplied to the recovery duct 41. . The recovery duct 41 is provided with a discharge portion 41A for recovering fertilizer at its right end. And the fertilizer collection | recovery part 34B with which each delivery mechanism 34 was equipped is connected to the site | part between the left end part and right end part in the collection | recovery duct 41. As shown in FIG. Each fertilizer recovery unit 34B incorporates a shutter (not shown) that can be switched to a fertilization state to prevent the flow of fertilizer to the collection duct 41 and a fertilizer collection state to allow the flow of fertilizer to the collection duct 41. ing. Thus, the fertilizer delivery unit 30 can supply fertilizer from the hopper 33 to the fertilizer delivery part 34A of each delivery mechanism 34 by the operation of each delivery mechanism 34 by switching the air passage switching part 40 and the shutter to the fertilized state. As a result, it is configured to be able to supply and convey the fertilizer from the fertilizer discharge part 34A of each feeding mechanism 34 to a predetermined fertilization position by the conveyance air from the blower 35. Further, the fertilizer delivery unit 30 can cause the surplus fertilizer remaining in the hopper 33 to flow down to the recovery duct 41 by switching the air path switching unit 40 and the shutter to the fertilizer recovery state, and by the transport air from the blower 35. It is comprised so that collection | recovery conveyance of the surplus fertilizer towards the discharge part 41A of the collection | recovery duct 41 is attained.

  As shown in FIGS. 1, 2 and 4 to 7, the fertilizing device 5 is provided with an intake duct C which bypasses the rear step 17 and extends to the vicinity of the engine 7 and the intake portion 35 A of the blower 35. As a result, high-temperature and dry ambient air around the engine can be used as a conveying wind for fertilization or fertilizer recovery. As described above, when the outside air dried at a high temperature is used as the carrier air, the humidity in the fertilizing device 5 can be reduced, and the fertilizer in the fertilizing device is less likely to be moistened. As a result, due to the fact that the fertilizer in the fertilizer application is moistened and easily attached, for example, the fertilizer adheres to the inside of the guide portion 31 or the recovery duct 41, and the amount of supplied fertilizer becomes a predetermined amount It is possible to make it less likely to cause a disadvantage such as a decrease in the amount of fertilizer or clogging of the inside of the guide portion 31 or the collection duct 41. And in order to achieve weight reduction while obtaining such an effect, the intake duct C is made of resin using a lightweight and relatively high heat resistant resin such as polypropylene or ethylene propylene rubber, for example. .

  Further, the intake duct C bypasses the rear step 17 and extends to the vicinity of the engine 7 and the intake portion 35A of the blower 35 so that the rear step can be performed by the intake duct C while the blower 35 is disposed above the rear step 17. It can suppress that 17 treads are restricted. Thereby, fertilizer supply to hopper 33 of fertilization device 5 using a tread side of rear step 17 can be comfortably performed, without being obstructed by air intake duct C.

  As shown in FIG. 1, FIG. 2, FIG. 4 to FIG. 7, and FIG. 9 to 15, the intake duct C is a lower duct portion 42 disposed below the rear step 17 and an upper duct disposed above the rear step 17. A portion 43, and a vertically oriented duct portion 44 located on the left outside of the rear step 17 and extending from the lower duct portion 42 to the upper duct portion 43, and the like. And the 1st connection part 45 which connects the lower duct part side and the upper duct part side of the air-intake duct C so that separation is possible is provided in the vertical direction duct part 44. As shown in FIG.

  The lower duct portion 42 has a first transverse duct portion 42A extending inward from the lower end of the vertical duct portion 44, and a first front and rear portion extending forward from an extension end inside the vehicle body in the first transverse duct portion 42A. An oriented duct portion 42B, an inclined duct portion 42C extending forward and downward from the front end of the first front and rear duct portion 42B, a second transversely directed duct portion 42D extending from the lower end of the inclined duct portion 42C to the inner side of the vehicle body, , And a second front-to-rear duct portion 42E extending toward the front engine 7 from an extension end on the inner side of the vehicle body in the first transverse duct portion 42A. Then, the first laterally oriented duct portion 42A is provided with a second connection portion 46 for connecting the vehicle body inner side portion 42Aa of the first laterally oriented duct portion 42A and the vehicle body outer side portion 42Ab in a detachable manner. Further, the second laterally oriented duct portion 42D is provided with a third connection portion 47 for connecting the vehicle body inner side portion 42Da and the vehicle body outer side portion 42Db of the second laterally oriented duct portion 42D in a separable manner.

  That is, a first duct component C1 extending over the intake section 35A of the blower 35 and the first connection section 45, a second duct component C2 extending over the first connection section 45 and the second connection section 46, The four-part structure consisting of four parts: the third duct part C3 that spans the two connection parts 46 and the third connection part 47, and the fourth duct part C4 that spans the third connection part 47 and the vicinity of the engine 7 ing.

  And, by thus forming the resin intake duct C into a four-divided structure consisting of four duct parts C1 to C4, the mold used when molding each duct parts C1 to C4 is unnecessarily large. It is possible to prevent an increase in mold cost caused by As a result, the cost required to manufacture the intake duct C can be reduced.

  Incidentally, each of the duct parts C1 to C4 is formed of a resin molded product blow molded using a resin such as polypropylene or ethylene propylene rubber described above.

  As shown in FIGS. 4 to 7 and 9 to 15, the first connection portion 45 of the intake duct C is provided on the upper duct portion side with the upward fitting portion 45A provided at the connection end portion on the lower duct portion side. The lower outer fitting portion 45B provided at the connecting end portion is configured to be fitted on the upper side. And, on the inner peripheral surface of the outer fitting portion 45B, an endless engaging groove 45Ba is provided along the circumferential direction of the outer fitting portion 45B. Further, the outer fitting portion 45B is provided with a pair of front and rear extending pieces 45Bb that can be elastically deformed so as to extend from the end edge of the outer fitting portion 45B in the fitting direction to the inner fitting portion 45A. And each extending piece 45Bb is provided with the engagement hole 45Bc. In addition, endless ridges 45Aa engaged with the engaging grooves 45Ba of the outer fitting portion 45B in the fitted state with the outer fitting portion 45B in the inner fitting portion 45A, and respective engagement holes 45Bc in the outer fitting portion 45B. And a pair of front and rear protrusions 45Ab that engage with each other.

  The second connection portion 46 of the intake duct C is a vehicle provided at the vehicle body outward facing inner fitting portion 46A provided at the vehicle body inner side portion 42Aa of the first lateral direction duct portion 42A at the vehicle body outer side portion 42Ab of the first lateral direction duct portion 42A. The external fitting portion 46B facing the inside of the body is externally fitted. And, on the inner peripheral surface of the outer fitting portion 46B, an endless engagement groove 46Ba is provided along the circumferential direction of the outer fitting portion 46B. Further, the outer fitting portion 46B is provided with a pair of front and rear extending pieces 46Bb that can be elastically deformed so as to extend from the end edge of the outer fitting portion 46B in the fitting direction to the inner fitting portion 46A. And each extending piece 46Bb is provided with the engagement hole 46Bc. Further, endless ridges 46Aa engaged with the engagement grooves 46Ba of the outer fitting portion 46B in the fitted state with the outer fitting portion 46B in the inner fitting portion 46A, and respective engagement holes 46Bc in the outer fitting portion 46B. And a pair of front and rear protrusions 46Ab that engage with each other.

  The third connection portion 47 of the intake duct C is a vehicle provided at the vehicle body outward facing inner fitting portion 47A provided at the vehicle body inner side portion 42D of the second lateral direction duct portion 42D at the vehicle body outer side portion 42Db of the first lateral direction duct portion 42D. The external fitting portion 47B facing the inside of the body is externally fitted. And, on the inner peripheral surface of the outer fitting portion 47B, an endless engaging groove 47Ba is provided along the circumferential direction of the outer fitting portion 47B. Also, the outer fitting portion 47B is provided with a pair of upper and lower extending pieces 47Bb that can be elastically deformed so as to extend from the end edge of the outer fitting portion 47B in the fitting direction with the inner fitting portion 47A. And each extending piece 47Bb is provided with engagement hole 47Bc. Further, endless ridges 47Aa engaged with the engaging grooves 47Ba of the outer fitting portion 47B in the fitted state with the outer fitting portion 47B in the inner fitting portion 47A, and respective engagement holes 47Bc in the outer fitting portion 47B. And a pair of upper and lower projections 47Ab that engage with each other.

  That is, by adopting the fitting method described above for each of the connection portions 45 to 47, the intake duct C can ensure appropriate connection of the duct parts C1 to C4 simply and reliably without using a dedicated part for connection. Can be done. Further, it is possible to effectively suppress the entry of the washing water from the connection parts 45 to 47 to the intake duct C at the time of car washing with the high pressure washing water.

  The respective duct parts C1 to C4 are formed in shapes and arrangements of the respective projections 45Ab, 46Ab, 47Ab for connection and engagement holes 45Bc, 46Bc, 47Bc provided in the respective duct parts C1 to C4 by molding the respective duct parts C1 to C4. The projections 45Ab, 46Ab, 47Ab, the engagement holes 45Bc, 46Bc, 47Bc, etc. are integrally formed by setting in consideration of the mold removal direction of the mold used for the above.

  As shown in FIGS. 4 to 7, 12, 13, 15 and 16, the intake duct C is connected to the second front-to-rear direction duct portion 42E of the lower duct portion 42 for bolt connection to the vehicle body frame 6. 1 connection portion 48 is provided. Further, the first horizontal duct portion 42A of the lower duct portion 42 is provided with a second connecting portion 49 for bolt connection to the left handrail member 21. The vehicle body frame 6 is bolted to the through hole 6B through which the fourth duct component C4 is inserted through the left handrail support portion 6A supporting the left handrail member 21 and the first connecting portion 48 of the fourth duct component C4. Connection portion 6C. The left handrail member 21 is provided with a connecting portion 21D for bolt connection to the second connecting portion 49 of the third duct component C3 in the left and right extension 21A on the rear side.

  Thereby, the intake duct C penetrates the lower duct portion side of the intake duct C formed by fittingly connecting the second duct component C2, the third duct component C3, and the fourth duct component C4 to the vehicle body frame 6 The lower duct portion side of the intake duct C can be temporarily placed below the rear step 17 of the traveling vehicle body 1 by inserting the opening 6B into the opening 6B. Then, the first connection part 45 is attached to the first duct component C1 which is the upper duct portion side of the intake duct C in which the lower duct portion side of the temporarily disposed intake duct C is fitted and connected to the intake portion 35A of the blower 35. By using and fitting and connecting, the intake duct C can be configured to bypass the rear step 17 and extend to the vicinity of the engine 7 and the intake portion 35A of the blower 35. Thereafter, the first connecting portion 48 of the intake duct C is bolted to the connecting portion 6C of the vehicle body frame 6, and the second connecting portion 49 of the intake duct C is connected to the connecting portion 21D of the left handrail 21 via the relay plate 50. By means of bolt connection to the above, it is possible to properly attach to a predetermined position of the traveling vehicle body 1.

  And when performing such attachment, as above-mentioned, the 1st connection part 45 of the intake duct C is located in the left outward of the rear step 17, Therefore The intake duct C which uses the 1st connection part 45 is used. The lower duct portion side and the upper duct portion side can be easily fitted and connected.

  As shown in FIGS. 4 and 17, the intake portion 35A of the blower 35 is provided with an inner fitting portion 35a which is internally fitted to the blower connection portion 43A of the upper duct portion 43 which is the blower side end of the intake duct C. In addition, a rubber fitting member 51 externally fitted to the blower connection portion 43A of the upper duct portion 43 is externally fitted. The fitting member 51 is fixed in a state in which the blower side end 51A of the fitting member 51 is externally fitted to the intake portion 35A of the blower 35 using a metal band 52. The duct side end portion 51B of the fitting member 51 is externally fitted to the blower connection portion 43A of the upper duct portion 43 which is externally fitted to the intake portion 35A of the blower 35.

  Thereby, the sealing property between the intake portion 35A of the blower 35 and the blower connection portion 43A of the upper duct portion 43 can be enhanced, and the intake portion 35A of the blower 35 and the blower connection portion 43A of the upper duct portion 43 It is possible to prevent air leakage from between. Further, the fitting member 51 is externally fitted to the blower connecting portion 43A of the upper duct portion 43 which is externally fitted to the inner fitting portion 35a of the intake portion 35A, whereby the inner fitting portion 35a of the intake portion 35A and the upper duct portion 43 are As compared with the case of interposing the seal member between the blower connection portion 43A, the assembly of the fitting member 51 (seal member) is facilitated and the assembly confirmation of the fitting member 51 (seal member) is easy. As a result, it is possible to prevent the assembly failure of the fitting member 51 (seal member) more reliably.

  As shown in FIG. 17, the fitting member 51 increases the thickness of the duct side end portion 51 </ b> B externally fitted to the blower connection portion 43 </ b> A of the upper duct portion 43. And, on the inner peripheral surface of the duct side end portion 51B, an endless engagement groove 51Ba along the circumferential direction of the fitting member 51 is provided. The intake duct C is provided at the blower connection portion 43A of the upper duct portion 43 with endless ridges 43Aa engaged with the engagement grooves 51Ba of the fitting member 51 in the fitting state with the fitting member 51. Thereby, the sealing performance between the intake portion 35A of the blower 35 and the blower connection portion 43A of the upper duct portion 43 can be further enhanced, and the intake portion 35A of the blower 35 and the blower connection portion 43A of the upper duct portion 43 Air leakage from between can be prevented more effectively.

  As shown in FIG. 2, FIG. 4 and FIG. 7, the fertilizer delivery unit 30 of the fertilizing device 5 has left and right support members 53 on the reinforcing member 22 provided on the left and right handrail members 21 with the connecting frame 36 of the fertilizer delivery unit 30. It is attached through. On the other hand, the intake duct C is provided with a second connecting portion 49 for bolt connection to the left handrail member 21 in the first sideward duct portion 42A on the blower side in the lower side duct portion 42.

  That is, the fertilization apparatus 5 is attaching the fertilizer delivery unit 30 provided with the blower 35 and the blower side of the intake duct C to the left handrail member 21 provided in the traveling vehicle body 1. Thus, the positional relationship between the blower 35 and the intake duct C of the fertilizer feeding unit 30 to be connected after being separately attached to the traveling vehicle body 1 can be made in an appropriate relationship that allows easy connection between the blower 35 and the intake duct C. It can be stabilized. As a result, the blower 35 and the intake duct C can be connected efficiently.

  As shown in FIG. 18 and FIG. 19, in the intake duct C, the second connection portion 46 can connect the auxiliary duct portion 54 between the vehicle body inner side portion 42Aa of the second connection portion 46 and the vehicle body outer side portion 42Ab. Configured for length adjustment.

  The auxiliary duct portion 54 also takes in air even when manufacturing a riding rice planter for eight-row planting having the eight-row seedling planting device wider than the six-row seedling planting device 4 as the working device A. It is an auxiliary duct component C5 for adjusting the length for making it possible to use the lower duct part side of the duct C for a rowing planter for eight-row planting. Therefore, the auxiliary duct portion 54 corresponds to the width of the rear step 17 which needs to be increased in width as the width of the seedling planting device 4 is increased. The half length of the difference in the width at the side of the duct is set to be the duct main body length of the auxiliary duct portion 54. And, an end portion of the auxiliary duct portion 54 is provided with an internally fitted portion 54A which is internally fitted to the externally fitted portion 46B of the second connection portion 46. In addition, the other end portion of the auxiliary duct portion 54 is provided with an outer fitting portion 54 B which is fitted to the inner fitting portion 46 A of the second connection portion 46. Then, on the inner peripheral surface of the outer fitting portion 54B, there is provided an endless engagement groove 54Ba that engages with the protrusion 46Aa of the second connection portion 46 in a fitted state with the second connection portion 46. The outer fitting portion 54B is provided with a pair of front and rear extending pieces 54Bb elastically deformable from the end edge of the outer fitting portion 54B in the fitting direction of the second connection portion 46 with the inner fitting portion 46A. And each extension piece 54Bb is provided with engagement hole 54Bc engaged with each protrusion 46Ab of the 2nd connection part 46 in the fitting state with the 2nd connection part 46. As shown in FIG. Further, in the inner fitting portion 54A, in the fitting state with the second connection portion 46, each engagement of the endless protrusion 54Aa engaged with the engagement groove 46Ba of the second connection portion 46 and the second connection portion 46 It has a pair of front and rear protrusions 54Ab engaged with the alignment hole 46Bc.

  By the way, fertilization device 5 for 8 rows equipped with riding rice planter for 8 rows planting makes all 4 units of feeding mechanism 34 with which 2 units of feeder units 30 are equipped, and according to this, guide part As 31, eight fertilization hoses 38 and eight groovers 39 are provided. Therefore, the width of the fertilizer delivery unit 30 disposed above the rear step 17 is the same regardless of whether it is for six or eight rows. On the other hand, it is necessary to make the rear step 17 correspond to the width (working width) of the seedling planting device 4 equipped on the traveling vehicle body 1 so that the width is different between 6 and 8 rows. It has become. Therefore, with regard to the positional relationship between the rear step 17 and the blower 35 provided in the fertilizer delivery unit 30, the distance from the left and right center of the rear step 17 to the blower 35 is the same regardless of whether it is for six or eight rows. On the other hand, the distance from the left and right ends of the rear step 17 to the blower 35 is different between the six rows and the eight rows.

  Taking this point into consideration, the intake duct C is configured by the upper duct portion side (first duct component C1) of the intake duct C that extends from the intake portion 35A of the blower 35 and the first connection portion 45 to a first duct for six lines It is configured to be exchangeable between the part C1 (see FIG. 5) and the first duct part C1 (see FIG. 18) for the eight strips. In addition, the lower duct portion side of the intake duct C extending to the first connection portion 45 and the vicinity of the engine 7 is configured as a dual-purpose type in which the specifications are changed to six and eight by attaching and removing the auxiliary duct 54 ing.

  That is, by configuring the lower duct portion side of the intake duct C to be able to be used both as the fertilization device 5 for six rows and the fertilization device 5 for eight rows, the entire intake duct C dedicated to six rows and the whole In comparison with the case where the air intake duct C is provided for exclusive use of eight lines, reduction of mold cost and facilitation of parts management can be achieved.

  As shown in FIG. 5, FIG. 6, FIG. 18, FIG. 20 and FIG. 21, the rear step 17 is made of a blow molded resin molded product. And it is configured to be able to be combined with a riding rice transplanter with mid mount fertilization specification and a riding rice transplanter other than with mid mount fertilization specification such as use without fertilization and rear mount fertilization specification, for example. Therefore, when the rear step 17 is used in a riding rice transplanter with mid-mount fertilization specification, the compression portion 17A joins the portion where the left and right support portions 32A of the fertilization frame 32 penetrate through the bottom surface side of the rear step 17 It is formed in. And when using for a riding rice transplanter of a mid-mount fertilization specification, the notch processing is given to the center site | part of each compression part 17A, and it is made to form the through-opening 17B for support | pillar part penetration.

  As a result, when the rear step 17 is used for a riding rice transplanter other than the mid mount fertilization specification, the left and right compression portions 17A form a part of the upper surface of the rear step 17. And when using rear step 17 for a riding rice transplanter of a mid mount fertilization specification, through-hole 17B formed in compression part 17A on either side, right and left support column 32A of fertilization frame 32 is rear step 17 Can be penetrated. Thereby, support of the fertilizer delivery unit 30 by the fertilization flame | frame 32 can be stably performed in the suitable support state which the support | pillar part 32A on either side does not bypass the rear step 17. FIG. And by forming penetration hole 17B in compression part 17A, while being able to control effectively a fall of strength of back step 17 resulting from forming penetration hole 17B, at the time of car wash by washing water of high pressure, It is possible to avoid the possibility that washing water may infiltrate into the rear step 17 from the through holes 17B.

  [Another embodiment]

[1] The paddy field work machine, for example, connects the seedling planting device 4 which is an example of the working device A to the rear of the traveling vehicle body 1 so as to be able to move up and down. An example of a mid-mount type riding rice transplanter equipped with a drug dispersion device as an example, without connecting the work device A to the rear of the traveling vehicle 1 so as to be able to move up and down; A direct seeding machine equipped with a seeding device, a seeding device as an example of the working device A is movably connected to the rear of the traveling vehicle body 1, and a fertilization device as an example of the granular material supply device B at the rear of the traveling vehicle 1 5 or a mid-mount specification direct-seeding vehicle equipped with a drug dispersion device, which is an example of a granular material supply device B at the rear of the traveling vehicle 1 without the work device A being connected to the rear of the traveling vehicle 1 Passenger fertilization machine equipped with fertilization device 5 or traveling It may be a riding medicine sprayer or the like in which a drug spraying device, which is an example of the granular material feeding device B, is disposed at the rear of the traveling vehicle 1 without connecting the working device A to the rear of the body 1 so as to move up and down. .

[2] The powder and granular material supply device B such as the fertilizer application device 5, the drug spray device, and the seeding device provided at the rear of the traveling vehicle body 1 is other than for 6 or 8 as exemplified in the above embodiment For example, it may be for four, five or ten.

[3] The arrangement of the engine 7 in the traveling vehicle body 1 can be variously changed. For example, the engine 7 may be disposed below the driver's seat 20.

[4] The configuration of the rear step 17 can be variously changed. For example, the rear step 17 may be molded using a molding method other than blow molding, such as injection molding. Further, the rear step 17 may be configured using a steel material such as a steel plate.

[5] The arrangement of the blower 35 in the granular material feeder B can be variously changed. For example, the powder and granular material supply device B may be disposed at the right end so that the blower 35 is located at the right end of the rear step 17. Alternatively, the blower 35 may be disposed at the left and right center of the granular material feeder B so that the blower 35 is located at the left and right center of the rear step 17.

[6] The blower 35 has a rubber fitting member which is externally fitted to the blower side end 43A only by providing the intake portion 35A with the inner fitting portion 35a internally fitted to the blower side end 43A of the intake duct C. 51 may not be externally fitted. In addition, the intake portion 35A of the blower 35 may be externally fitted to the blower side end 43A of the intake duct C.

[7] The guiding portion 31 of the granular material feeder B has, for example, a downward spreading diffusion release tool which diffuses and guides the granular material transported by the conveying air from the blower 35 to a predetermined area of the field. It may be configured as follows.

[8] The intake duct C may be configured such that the vertically oriented duct portion 44 extending from the lower duct portion 42 to the upper duct portion 43 is located on the right outside of the rear step 17. Also, the vertical duct portion 44 may be configured to be located behind the rear step 17.

[9] The connection portion (first connection portion) 45 provided in the vertical duct portion 44 of the intake duct C is connected to the upper duct portion side to the upward fitting portion provided at the connection end portion on the lower duct portion side The upper inner fitting type may be configured to be fitted with a downward inner fitting portion provided at the end portion.

[10] The connecting portion (second connecting portion) 46 provided in the lateral duct portion 42A of the intake duct C is the first lateral direction in the outward fitting portion of the first lateral duct portion 42A in the vehicle body inner portion 42Aa. The inside fitting portion of the duct portion 42A, which is provided at the vehicle body outer side portion 42Ab of the duct portion 42A, may be internally fitted.

[11] The intake duct C is provided at the vehicle body outer side portion 42Db of the first transverse direction duct portion 42D at the outer fitting portion of the third connection portion 47 provided at the vehicle body inner side portion 42Da of the second lateral direction duct portion 42D. It may be configured in an outer side fitting type in which the provided inward fitting portion in the vehicle body is internally fitted.

[12] The intake duct C disconnectably connects the inboard portion 42Da and the outboard portion 42Db of the second transverse duct portion 42D to the second transverse duct portion 42D, and the vehicle body of the second transverse duct portion 42D A connection portion 46 for adjusting the length may be provided to enable connection of the auxiliary duct portion 54 between the inner portion 42Da and the vehicle body outer portion (42Ab).

[13] The connection parts 45 to 47 and the auxiliary duct part 54 of the intake duct C have projections on the pair of extension pieces 45Bb, 46Bb, 47Bb, 54Bb, and extend to the inner fitting parts 45A, 46A, 47A, 54A. You may comprise so that the engagement hole which the protrusion of protrusion 45Bb, 46Bb, 47Bb, 54Bb engages may be provided.

[14] The connection portions 45 to 47 and the auxiliary duct portion 54 of the intake duct C may be configured to be bolted in a state where the duct end portions are fitted. Also, it may be configured to be bolted in a state in which the duct ends are abutted.

[15] As shown in FIGS. 22 and 23, in the case where the lower duct portion side of the intake duct C can be used for both six and eight rows, the second example exemplified in the above embodiment The second duct component C2 may be a duct component in which the auxiliary duct portion 54 is integrally formed with the duct component C2 and can be used for both six and eight lines.
Specifically, the second duct component C2 illustrated in this alternative embodiment has an appropriate length for use as an eight-row. Then, an endless engagement groove is engaged with an endless engagement groove 45Ba provided in the outer fitting portion 45B of the first duct component C1 at an inner fitting portion 45A of the second duct component C2 which is a connecting portion with the first duct component C1. A protrusion 45Aa and a pair of front and rear protrusions 45Ab engaged with a pair of front and rear engagement holes 45Bc provided in the outer fitting portion 45B of the first duct component C1 are provided. Also, there is an endless engagement engaged with the endless ridge 46Aa provided on the inner fitting portion 46A of the third duct part C3 at the outer fitting part 54B of the second duct part C2 which is the connecting part with the third duct part C3. A pair of front and rear extending pieces 54Bb extending toward the third grooved part C3 and the pair of front and rear pairs provided on the inner fitting portion 46A of the third duct part C3 in each extending piece 54Bb An engagement hole 54Bc is provided to engage with the protrusion 46Ab. Furthermore, an outer fitting portion 46B which is a connecting portion with the third duct component C3 is provided on the left and right center sides of the second duct component C2 when the second duct component C2 is used for six rows. And, it is used as an endless engagement groove 46Ba which can be engaged with the endless protrusion 46Aa provided on the inner fitting portion 46A of the third duct component C3 in the outer fitting portion 46B on the left and right center side, and for six strips. In this case, a pair of front and rear extending pieces 46Bb are provided to be extended toward the third duct component C3. However, the extended pieces 46Bb on the left and right center sides do not have the engagement holes 54Bc that engage with the pair of front and rear protrusions 46Ab provided in the inner fitting portion 46A of the third duct component C3.
And when using the 2nd duct component C2 illustrated by this other embodiment for eight lines, as shown in Drawing 22, in the state where the 2nd duct component C2 was provided with the auxiliary duct part 54. use. Further, when used for six-row, as shown in FIG. 23, the second duct component C2 is separated from the auxiliary duct portion 54 from the second duct component C2 so that a pair of front and rear extending pieces 46Bb remain. The engagement holes 46Bc are formed in the pair of front and rear extension pieces 46Bb left behind.
According to this configuration, the mold used for forming the second duct part C2 can be made common regardless of whether it is used for six or eight lines, and the mold dedicated to the auxiliary duct part is not required. Can. As a result, the mold cost can be reduced. Further, by integrally forming the auxiliary duct portion 54 on the second duct component C2, the component management can be facilitated by reducing the number of components.

[16] The intake duct C is provided with the second duct component C2 for exclusive use of six lines and the second duct component C2 for exclusive use of eight lines without the auxiliary duct portion 54, whereby the third duct component C3 and the fourth duct component C3 and The duct component C4 may be configured to be used for both six and eight lines.

[17] The lower duct portion 42 of the intake duct C, for example, the transverse duct portion 42A extending from the lower end of the longitudinal duct portion 44 to the inside of the vehicle body, and the engine 7 from the extending end inside the vehicle body in the transverse duct portion 42A. It may be composed of a forward and backward duct portion extending in the vicinity of the

[18] For example, a first duct component C1 across the intake duct C from the intake section 35A of the blower 35 and the first connection 45, a second duct component C2 across the first connection 45 and the second connection 46, and The third duct part C3 may be configured as a three-part split structure that spans the second connection portion 46 and the vicinity of the engine 7. Also, a two-part split consisting of a first duct component C1 across the intake 35A of the blower 35 and the first connection 45 and a second duct component C2 across the first connection 45 and the vicinity of the engine 7 It may be structured.

[19] The resin-made duct parts C1 to C4 constituting the intake duct C may be molded using a molding method such as injection molding other than blow molding.

[20] The granular material feeding apparatus B may be configured to change the number of working bars by changing the quantity of the feeding mechanism 34 provided in the granular material feeding unit B1. And when the granular material supply apparatus B is configured in this way, the paddy field having a different number of working bars is used by utilizing the fact that the lateral width of the granular material feeding unit B1 changes with the change in the number of working bars. By setting the amount of change in the left and right width of the rear step 17 provided in the work machine to be the same as the amount of change in the left and right width of the powder material feeding unit B1, the suction portion 35A of the blower 35 and the first connection portion 45 are set. The upper duct portion side (first duct component C1) of the intake duct C may be configured to be commonly used regardless of the number of working strips of the paddy field work machine.

[21] The particulate material feeding unit B1 including the blower 35 and the intake duct C may be attached to a predetermined support member extended from the vehicle body frame 6 of the traveling vehicle body 1 to the upper side of the rear step 17 .

[22] Form an endless ridge along the circumferential direction of the fitting member 51 on the inner peripheral surface of the fitting member 51 provided in the intake portion 35A of the blower 35, and fit the blower side end 43A of the intake duct C You may form the endless engagement groove engaged with the protrusion of the fitting member 51 in the fitting state with the joint member 51.

  The present invention relates to a paddy field work machine such as a riding rice planter, a riding direct seeding machine, a riding fertilization machine, or a riding drug sprayer, in which a granular material feeder is disposed at the rear of a traveling vehicle body provided with an engine and a rear step. It can apply.

DESCRIPTION OF SYMBOLS 1 traveling vehicle body 6 vehicle body frame 7 engine 17 rear step 21 handrail member 31 guiding portion 35 blower 35A intake portion 35a inner fitting portion 42 lower duct portion 42A lateral duct portion 42Aa vehicle body inner portion 42Ab vehicle body outer portion 42D lateral direction duct portion 42Da vehicle inner side Part 42Db Vehicle body outer part 43 Upper duct part 43A Blower end 43Aa Protrusion 44 Vertical duct part 45 Connection part (1st connection part)
45A inner fitting portion 45B outer fitting portion 45Bb extension piece 45Bc engagement hole 46 connection portion for adjusting the length (second connection portion, third connection portion)
DESCRIPTION OF SYMBOLS 51 fitting member 51Ba engaging groove 54 auxiliary duct part 54Ab protrusion B granular material supply apparatus B1 granular material delivery unit C intake duct

Claims (7)

A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The lower duct portion extends from the lower end of the vertical duct portion in the front direction and the laterally inward direction of the traveling vehicle body.
A paddy field work machine provided with a connecting portion for connecting the lower duct portion side and the upper duct portion side of the intake duct in a detachable manner in the vertical duct portion. A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
The lower duct portion extends from the lower end of the vertical duct portion in the front direction and the laterally inward direction of the traveling vehicle body.
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
The connection portion is a paddy field work in which a downward externally fitting portion provided at the connection end portion at the upper duct portion side is externally fitted to the upward inner insertion portion provided at the connection end portion at the lower duct portion side Machine. A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
The blower is disposed at the left and right end portions of the rear step, and the vertically oriented duct portion is disposed laterally outside the rear step at the same left and right end portions as the blower.
The lower duct portion includes a transverse duct portion extending from the vertical duct portion to the inside of the vehicle body,
The inboard portion and the outboard portion of the laterally oriented duct portion are separably connected to the laterally oriented duct portion, and a connection of an auxiliary duct portion between the inboard portion and the outward portion is enabled. Connection for adjusting the length of the
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
A paddy field work machine in which the laterally oriented duct portion of the lower duct portion extends in a laterally inward direction of the traveling vehicle body from a lower end of the vertically oriented duct portion. A granular material feeder is disposed at the rear of the traveling vehicle body equipped with an engine and a rear step,
The powder and granular material supply device includes a blower positioned above the rear step to generate a conveying wind, a guide unit guiding the powder and granular material conveyed by the carrier wind, and the engine bypassing the rear step. An intake duct that extends between the vicinity of the
The intake duct includes a lower duct disposed below the rear step, an upper duct disposed above the rear step, and a vertically oriented duct extending from the lower duct to the upper duct. Equipped
The vertically oriented duct portion is provided with a connecting portion for detachably connecting the lower duct portion side and the upper duct portion side of the intake duct,
In the connection portion, the downward fitting portion provided at the connection end portion at the upper duct portion side is externally fitted to the upward inner fitting portion provided at the connection end portion at the lower duct portion side,
The blower is disposed at the left and right end portions of the rear step, and the vertically oriented duct portion is disposed laterally outside the rear step at the same left and right end portions as the blower.
The lower duct portion includes a transverse duct portion extending from the vertical duct portion to the inside of the vehicle body,
The inboard portion and the outboard portion of the laterally oriented duct portion are separably connected to the laterally oriented duct portion, and a connection of an auxiliary duct portion between the inboard portion and the outward portion is enabled. Connection for adjusting the length of the
The upper duct portion extends from the intake portion of the blower to a position overlapping with the rear step in a front view and a lateral outer direction of the traveling vehicle body in plan view,
The longitudinally oriented duct portion extends downwardly from the front end of the upper duct portion laterally outwardly of the aft step;
A paddy field work machine in which the laterally oriented duct portion of the lower duct portion extends in a laterally inward direction of the traveling vehicle body from a lower end of the vertically oriented duct portion. The outer fitting portion is provided with an elastically deformable extension piece extending from an end edge of the outer fitting portion in a fitting direction to the inner fitting portion, and an engagement hole is formed in the extension piece,
The paddy field work machine according to claim 2 or 4 in which a projection engaged with said engagement hole is formed in said inner fitting part in the state of fitting with said outer fitting part. Extending left and right handrail members disposed adjacent to left and right ends of the rear step from the vehicle body frame of the traveling vehicle body,
The paddy field work machine according to any one of claims 1 to 4, wherein a powdery material delivery unit including the blower and the intake duct are attached to the handrail member. The intake section includes an internally fitted portion which is internally fitted to the blower side end of the intake duct, and a rubber fitting member externally fitted to the blower side end is externally fitted.
In the inner circumferential surface of the fitting member, an endless engagement groove is formed along the circumferential direction of the fitting member,
The paddy field work machine according to any one of claims 1 to 4, wherein the blower side end portion is formed with an endless protrusion engaged with the engagement groove in a fitting state with the fitting member. .

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