JP5916579B2 - Paddy field machine - Google Patents

Description

  The present invention relates to a paddy field work machine provided with a radiator for cooling an engine.

An example of such a paddy field machine is disclosed in Patent Document 1. The paddy field machine of Patent Document 1 is provided with a bonnet that can be opened and closed up and down around the left and right axis around the front part of a traveling machine body ("self-propelled vehicle" in the literature). Inside the bonnet, an engine, a radiator ("engine radiator" in the literature) arranged behind the engine, and an oil cooler arranged behind the radiator are provided.
Although not specifically described in Patent Document 1, it is preferable that the heat exchanging portion of the radiator is provided with a detachable protective net for preventing intrusion of foreign matters such as dust and dirt.

JP-A-9-318287 (FIG. 2)

  However, in the paddy field machine described in Patent Document 1, the radiator is disposed at the rear of the engine and is disposed so as to be sandwiched between the engine and the oil cooler. It is difficult to place. Even if the radiator is provided with a protective net, the protective net is disposed at a position where it is difficult to reach, so that the labor required to attach and detach the protective net increases.

  An object of the present invention is to provide a paddy field work machine in which a protection net for a radiator can be easily attached and detached.

The first feature of the paddy field working machine according to the present invention is a bonnet that is disposed at the front part of the traveling machine body and can be opened and closed up and down around the left and right axial cores, the engine disposed inside the bonnet, and the bonnet A radiator disposed on the lateral side of the engine and a support frame disposed on the lateral side of the engine inside the bonnet, and supporting the protective net that covers a heat exchange part of the radiator A single attachment member that can be attached to and detached from the frame is provided in a portion of the support frame that is located above the front side of the radiator.

According to this characteristic configuration, the following operations and effects are achieved.
The bonnet is arranged at the front part of the traveling machine body and can be opened and closed up and down around the rear left and right axis, and a radiator and a support frame are arranged on the side of the engine. In such a configuration, a single attachment member capable of attaching and detaching the protection net of the radiator to the support frame is provided in a portion of the support frame located on the upper front side of the radiator. For this reason, when the bonnet is opened, the attachment member is exposed to a portion located on the upper front side of the radiator, so that the bonnet does not get in the way and the hand can easily reach the attachment member. And attachment / detachment operation of an attachment member is attained from the front side, and the operativity of an attachment member can be made good. For this reason, it becomes easy to attach and detach the protection net, and for example, the time and labor required for maintenance of the protection net can be reduced.

  In addition, since the mounting member is provided in a portion of the support frame that is positioned above the front side of the radiator, the mounting member does not take up space in the vertical direction. For this reason, it is not necessary to design the bonnet in consideration of the interference of the mounting member with the bonnet, and the appearance of the bonnet can be kept good.

  A second feature of the paddy field working machine according to the present invention is a mission case that is disposed behind the engine and houses a mission, a driver seat that is disposed behind the mission case, and hydraulic oil in the mission case. An oil cooler that cools the vehicle, and the oil cooler is disposed below the driver seat.

According to this characteristic configuration, the following operations and effects are achieved.
Since the oil cooler is disposed away from the radiator, the oil cooler and the radiator are prevented from exerting heat effects on each other. For this reason, it is possible to improve the cooling efficiency in both the oil cooler and the radiator. As a result, engine and mission overheating can be effectively prevented.

  A third feature of the paddy field working machine according to the present invention is that a duct for guiding air from a cooling fan provided in the transmission case to the oil cooler is provided.

According to this characteristic configuration, the following operations and effects are achieved.
By guiding the air of the cooling fan that cools the transmission case to the oil cooler through the duct, the oil cooler can be cooled more efficiently than natural heat dissipation. Thereby, it is not necessary to provide a dedicated fan for cooling the oil cooler, and the oil cooler can be cooled with a simple structure.

  According to a fourth aspect of the paddy field machine according to the present invention, a spraying device for spraying spray material is provided at a rear portion of the traveling machine body, and the spray material is taken into the surface by taking in air around the oil cooler. A blower that blows air to the spraying device as a conveying air is provided.

According to this characteristic configuration, the following operations and effects are achieved.
For example, powder-like spray material tends to harden due to moisture, and may develop into clogging if it adheres to each part of the spraying device and hardens. The air around the oil cooler is warmed by the heat of the oil cooler and is relatively dry. This warm and dry air can be taken into the suction part of the blower and used, for example, as a conveying wind for conveying the granular material in the form of dust to the rice field by the spraying device. By using the warm and dry air around the oil cooler as the conveying air for the spraying material, the fluidity of the spraying material is improved, so that the occurrence of clogging of the spraying material in the spraying device can be suppressed. Moreover, since the oil cooler is provided below the driver's seat, the distance from the oil cooler to the blower can be shortened, and exhaust heat utilization can be realized with a simple configuration.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is a side view in a bonnet. It is a top view in a bonnet. It is a front view which shows the dustproof net in a bonnet. It is attachment explanatory drawing of a dustproof net. It is the perspective view which looked at the dustproof net from the upper part of the horizontal one side direction. It is the perspective view which looked at the attachment support part from the upper direction of the horizontal one side direction. It is the perspective view of the 1st engaging part, (a) is the perspective view seen from the upper side of the horizontal one side direction, (b) is the perspective view seen from the upper side of the horizontal other side direction. It is a perspective view of the 2nd engaging part, (a) is the perspective view seen from the upper side of the horizontal one side direction, (b) is the perspective view seen from the upper side of the horizontal other side direction. It is a perspective view of a 3rd engaging part, (a) is the perspective view seen from the upper side of the horizontal one side direction, (b) is the perspective view seen from the upper side of the horizontal other side direction. It is a conceptual diagram which shows the flow of the air from a speed-change cooling fan.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration]
As shown in FIGS. 1 and 2, a riding type rice transplanter 10 (corresponding to a “paddy field machine”) includes a pair of left and right drive front wheels 11 and a pair of left and right drive rear wheels 12 that can freely travel. An engine room 15 that houses the engine 14 and a mission case 16 that houses a mission are disposed on the front side of the engine 13. A boarding driving unit 22 equipped with a steering handle 17, a driving seat 18, a transmission lever 19, a driving step 20, and the like is disposed at the center of the traveling machine body 13. An eight-row planting seedling planting device 25 that can be moved up and down via a link mechanism 24 by operating a lift cylinder 23 is connected to the rear of the traveling machine body 13. Also, the rear portion of the vehicle body 13, between the driver's section 22 and the seedling planting apparatus 25 (corresponding to the "spraying apparatus") fertilizing device 26 for spraying the fertilizer is a granular material shaped spraying materials Is provided. The transmission case 16 is provided with an HST 21 (hydrostatic continuously variable transmission) that is operated by operating a speed change lever 19 and that allows the traveling machine body 13 to be switched forward and backward. The transmission case 16 pivotally supports the driving front wheel 11 via the front axle case 27 and transmits the driving force of the engine 14 to the driving rear wheel 12 pivotally supported by the driving front wheel 11 and the rear axle case 28.

  A boarding / alighting step 29 connected to the driving step 20 is provided on each of the left and right lateral sides outside the engine room 15, and the driving step 20 and the boarding / alighting step 29 form a boarding / alighting passage. The boarding / alighting step 29 is used for getting on the boarding driving unit 22 from the front of the traveling machine body 13 and getting off from the boarding driving unit 22 to the front of the running machine body 13.

  As shown in FIGS. 3 to 5, the upper surface, the front and rear surfaces, and the lateral surfaces of the engine room 15 are covered with a bonnet 30 disposed at the front portion of the traveling machine body 13. The bonnet 30 includes a movable bonnet 31 that covers the upper part of the engine room 15 and a fixed bonnet 32 that covers the lower part of the engine room 15. The fixed bonnet 32 rotatably supports the steering handle 17 at its rear portion and covers the lower half of the engine 14. The bonnet 30 is configured such that the movable bonnet 31 can be opened and closed with respect to the fixed bonnet 32 by turning around the left and right axis X located in the upper part of the engine room 15. A vent hole 33 for taking in air into the engine room 15 is formed at one side of the movable bonnet 31.

  A water-cooled engine 14 is mounted in the engine room 15. The engine 14 is mounted on the engine frame 34 via a vibration-proof rubber in a horizontal posture so that the output shaft 14a is horizontally horizontal. The engine frame 34 is fixedly connected to the mission case 16. An air cleaner 35 is disposed on the upper rear side of the engine 14. A generator 37 is provided near the front side of the engine 14.

[Radiator]
As shown in FIGS. 3 to 6, a radiator 38 that cools the engine 14 is disposed at one side of the engine 14. The radiator 38 is fixed to the engine frame 34 by pins 38a formed at four locations on the top and bottom. The radiator 38 is disposed in a posture in which the suction side surfaces of the fins 39 (corresponding to the “heat exchanger”) of the radiator 38 are directed in the laterally outward direction. An engine air cooling fan 40 is disposed between the radiator 38 and the engine 14. A fan shroud 41 (corresponding to a “support frame”) that covers and protects the outer periphery of the engine air cooling fan 40 is attached and fixed to the engine frame 34. The engine air cooling fan 40 is linked to the output shaft 14 a of the engine 14. The input shaft of the generator 37 is interlocked with the output shaft 14 a via the winding transmission device 36. By driving the engine air cooling fan 40, cooling air flowing from the ventilation port 33 to the engine 14 via the radiator 38 is generated. As a result, the engine 14 is cooled by cooling the radiator 38 with the cooling air, and the engine 14 is also cooled by blowing the cooling air directly on the engine 14.

  The radiator 38 is disposed at a height that overlaps the height position at which the getting-on / off step 29 is disposed. Further, the radiator 38 is disposed at a height position overlapping the upper end position of the front portion of the fixed bonnet 32. For this reason, when the movable bonnet 31 is opened, the lower part of the radiator 38 is hidden by the front part of the fixed bonnet 32 in a side view, and only the upper part of the radiator 38 is exposed.

[Dust-proof net]
As shown in FIGS. 3 to 7, a dust-proof net 42 (corresponding to a “protective net”) that prevents intrusion of dust or dirt into the fins 39 is detachable at one side of the radiator 38. It is attached. The dustproof net 42 has a rectangular shape in which the lengths of the front and rear sides and the upper and lower sides are substantially equal in a side view. The dustproof net 42 includes, for example, a net portion 43 formed in a lattice shape by vertically and horizontally assembling a strip or wire made of a metal material or a resin material, and a support frame 44 that surrounds the outer periphery of the net portion 43 over the entire circumference. And is made up of. A metal L-shaped member 45 whose rear side is bent inwardly is fixed to the upper part of the front side of the support frame 44, which is the front upper part of the dustproof net 42, by bolts, nuts, and the like. And the L-shaped member 45 are integrated.

  As shown in FIGS. 5 to 8, the dust-proof net 42 is detachably attached to the radiator 38 by being detachably attached to an attachment fixing portion 50 provided on the lateral outer side of the fan shroud 41. The attachment fixing portion 50 includes a first engagement portion 51, a second engagement portion 52, a third engagement portion 53, and a tightening fixation portion 54.

  As shown in FIGS. 6 to 8, the first engagement portion 51 is disposed on the rear end upper side of the shroud main body portion 41 a of the fan shroud 41. The first engaging portion 51 restricts the movement of the dustproof net 42 in the lateral direction and the movement in the rear direction. As shown in FIG. 8, the first engagement portion 51 includes a first attachment portion 56, a first bracket 57, and a first stay 58.

  As shown in FIGS. 9A and 9B, the first bracket 57 includes a bracket main body portion 57a extending in the vertical direction with the plate surface facing the front-rear direction, and a bracket main body portion 57a from the front end edge of the bracket main body portion 57a. A projecting part 57b projecting outward so as to form a right angle with the projecting part 57b and a projecting part 57c projecting forward from the lateral outer end of the projecting part 57b so as to form a right angle with the projecting part 57b. It is configured. As shown in FIG. 8, the first attachment portion 56 is formed to extend rearward from the rear end upper portion of the shroud main body portion 41 a of the fan shroud 41. A bracket body 57a is fixed to the first mounting portion 56 with bolts, nuts, and the like. The first stay 58 has a U-shape with a rounded portion at the rear in plan view, and is fixed to the lateral outer surface of the extending portion 57c by welding or the like. Therefore, the upper portion of the first stay 58 is open so that the dustproof net 42 can be inserted from above.

  As shown in FIGS. 6 to 8, the second engaging portion 52 is disposed on the lower side of the rear end of the shroud main body portion 41 a of the fan shroud 41. The second engaging portion 52 supports the dustproof net 42 from below and restricts the movement of the dustproof net 42 in the lateral direction and the backward direction. As shown in FIG. 8, the second engagement portion 52 includes a second attachment portion 63, a second bracket 64, and a second stay 65.

  As shown in FIGS. 10A and 10B, the second bracket 64 has the same configuration as the first bracket 57. That is, the second bracket 64 protrudes outward so as to form a right angle with the bracket body 64a from the front end edge of the bracket body 64a and the bracket body 64a extending vertically with the plate surface facing the front and back. The overhanging portion 64b and an extension portion 64c extending forward from the lateral outer end of the overhanging portion 64b so as to form a right angle with the overhanging portion 64b. The second mounting portion 63 is formed to extend rearward from the rear end lower portion of the shroud main body portion 41 a of the fan shroud 41. As shown in FIG. 8, a bracket body 64 a is fixed to the second mounting portion 63 with bolts, nuts, and the like. The second stay 65 is configured by integrating a rear stay 66 that has a U-shape with a rounded portion at the rear in a plan view and a lower stay 67 that has a U-shape with a rounded portion at the bottom in a plan view. Yes. The rear stay 66 is fixed to the lateral outer surface of the extending portion 64c by welding or the like.

  As shown in FIGS. 6 to 8, the third engagement portion 53 is disposed on the lower side of the front end of the shroud main body portion 41 a of the fan shroud 41. The third engaging portion 53 supports the dustproof net 42 from below and restricts the movement of the dustproof net 42 in the lateral direction. As shown in FIG. 8, the third engagement portion 53 includes a third attachment portion 68, a third bracket 69, and a third stay 70.

  As shown in FIGS. 11 (a) and 11 (b), the third bracket 69 includes a bracket main body 69a extending in the vertical direction with the plate surface facing in the front-rear direction, and a bracket main body 69a from the lower end edge of the bracket main body 69a. And a projecting portion 69b projecting laterally outward so as to form a right angle with the projecting portion 69b and a projecting portion 69c projecting downward from the lateral outer end of the projecting portion 69b so as to form a right angle with the projecting portion 64b. It is configured. The third attachment portion 68 is formed to extend forward from the lower front end of the shroud main body portion 41 a of the fan shroud 41. A bracket main body 69a is fixed to the third mounting portion 68 with bolts, nuts and the like. The third stay 70 has a U-shape with a rounded portion in the lower part when viewed from the front, and is fixed to the lateral outer surface of the extending portion 69c by welding or the like. For this reason, the front part of the third stay 70 is open, and the dustproof net 42 can be inserted from the diagonally upper front.

  As shown in FIGS. 4 to 7, the tightening and fixing portion 54 is disposed at the front and rear center position of the engine room 15, and is disposed on the front end upper side of the shroud main body portion 41 a of the fan shroud 41. A bent portion 41b is formed which extends from the upper front end of the shroud main body portion 41a to the inner side and is bent. The tightening fixing portion 54 is configured such that the dustproof net 42 can be attached to and detached from the fan shroud 41 by a knob bolt 71 (corresponding to an “attachment member”). That is, the dustproof net 42 can be attached to and detached from the bent portion 41 b of the fin 39 of the radiator 38 by the knob bolt 71. The bent portion 41 b is provided with a screwing portion 74, and the screwing portion 74 is configured by a nut or the like that is fixed to the rear surface of the fastening fixing portion 54 by welding or the like. The threaded portion 72 of the knob bolt 71 communicates with the front-rear portion of the L-shaped member 45 fixed to the front upper portion of the dust-proof net 42 and the fastening fixing portion 54 in the front-rear direction, and the knob portion 73 of the knob bolt 71 is rotated. Then, the screw part 72 is screwed into the screwing part 74. As a result, the L-shaped member 45 is fixed to the fastening portion 54. Thereby, the dust-proof net 42 can be fixed to the fan shroud 41. An insertion hole (not shown) that intersects the longitudinal direction of the screw part 72 is formed at the tip of the screw part 72, and a knob bolt 71 is inserted by inserting a retaining member such as a snap pin (not shown) into the insertion hole. Is prevented from coming off.

[Attaching and removing dustproof net]
As shown in FIG. 6, when attaching the dust-proof net 42 to the radiator 38, the dust-proof net 42 is inserted into the attachment fixing portion 50 from an oblique front. The dust-proof net 42 is supported from below by the second engaging portion 52 and the third engaging portion 53, and the L-shaped member 45 fixed to the dust-proof net 42 is brought into close contact with the tightening fixing portion 54 of the fan shroud 41 to the front. If the dust-proof net 42 is fixed to the laterally outer side of the fan shroud 41 by inserting the knob bolt 71 from there and rotating it, the work of attaching the dust-proof net 42 to the radiator 38 is completed.

  When removing the dustproof net 42 from the radiator 38, the knob bolt 71 is reversely rotated from the front to release the fixing of the dustproof net 42 to the lateral outer side of the fan shroud 41. Subsequently, when the dust-proof net 42 is lifted obliquely forward and upward and the dust-proof net 42 is removed from the fan shroud 41, the removal work of the dust-proof net 42 from the radiator 38 is completed.

[Variable cooling fan]
As shown in FIGS. 1, 3, and 12, a transmission cooling fan 75 (corresponding to a “cooling fan”) is provided on the lateral side of the mission case 16. More specifically, the variable speed cooling fan 75 is attached to the input shaft 21 a of the HST 21 disposed on the lateral side portion of the mission case 16. The input shaft 21 a extends from one side of the front portion of the transmission case 16 toward the other side, and is arranged so as to be aligned with the output shaft 14 a on the other side of the engine 14 in the front-rear direction. Yes. The input shaft 21 a is linked to the output shaft 14 a of the engine 14 via a transmission device 76. The winding transmission device 76 is configured by winding a transmission belt 76c around an output pulley 76a attached to the output shaft 14a and an input pulley 76b attached to the input shaft 21a. As shown in FIG. 12, a variable speed cooling fan 75 is mounted on the input shaft 21a of the HST 21 inside the input pulley 76b. The variable speed cooling fan 75 generates wind that flows outward from the HST 21 to cool the HST 21.

(Oil cooler)
As shown in FIGS. 1, 2, and 12, an oil cooler 78 is provided below the driver seat 18. The oil cooler 78 is supplied with hydraulic oil from the mission case 16, and is configured to cool the supplied hydraulic oil and return it to the mission case 16. An intake pipe (not shown) that guides the hydraulic oil from the mission case 16 to the oil cooler 78 and a discharge pipe (not shown) that guides the hydraulic oil from the oil cooler 78 to the mission case 16 are arranged around the lower side of the operation step 20, respectively. Has been. As described above, the oil cooler 78 is disposed below the driver seat 18 away from the radiator 38 disposed in the front portion of the traveling machine body 13, so that the exhaust heat of the oil cooler 78 increases the cooling efficiency of the radiator 38. It can be prevented from lowering.

〔duct〕
A duct 79 for transferring cooling air that cools the oil cooler 78 is provided between the variable speed cooling fan 75 and the oil cooler 78. The duct 79 is provided with a suction port 79 a disposed close to the lateral side of the variable speed cooling fan 75 and a discharge port 79 b disposed outside the oil cooler 78. Air taken in from the suction port 79 a by the variable speed cooling fan 75 passes through the duct 79, is discharged from the discharge port 79 b as cooling air, and is blown to the oil cooler 78. Thereby, cooling of the oil cooler 78 is promoted, and overheating of the HST 21 can be effectively prevented.

[Seedling planting equipment]
As shown in FIG. 1, the seedling planting device 25 is connected to the traveling machine body 13 via a link mechanism 24 and is configured to be movable up and down by driving a lift cylinder 23 formed of a hydraulic cylinder. The seedling planting device 25 is provided with a seedling stage 80, a planting mechanism 81, and a grounding float 82. The seedling stage 80 is driven to reciprocate with a set stroke in the left-right direction. A plurality of planting mechanisms 81 are arranged on the left and right with a spacing between the planting strips, and in conjunction with the movement of the seedling platform 80, the seedling platform 81 is circulated between the seedling outlet and the field. Take out 80 seedlings by planting unit amount and plant them in the field. The grounding float 82 leveles the planned planting scene by sliding the farm scene as it travels.

[Fertilizer]
As shown in FIGS. 1 and 2, the fertilizer application device 26 includes a hopper 83, a feeding device 84, a grooving device 85, and a hose 86. In the hopper 83, a granular fertilizer is stored as a spray material. The feeding device 84 feeds the fertilizer in the hopper 83 by a set amount in conjunction with the planting operation of the seedling planting device 25. In front of the feeding device 84, a blower 87 for generating an air flow for feeding the fertilizer fed from the feeding device 84 to the groove producing device 85 through the hose 86 is provided. The blower 87 takes in the air around the oil cooler 78 and blows it to the fertilizer application device 26 as conveying air for conveying the fertilizer to the rice field. The grooving device 85 forms a fertilizer groove in the field as the vehicle travels, and supplies the fertilizer sent by the hose 86 into the formed groove.

  As shown in FIG. 12, the suction portion 87 a of the blower 87 is disposed in the vicinity of the oil cooler 78. The blower 87 sucks in air around the oil cooler 78 whose temperature has risen due to exhaust heat of the oil cooler 78 from the suction portion 87 a and supplies the air to the delivery portion 88. Thereby, warm and dry air is conveyed to the feeding device 84. For example, fertilizer in the form of granular material tends to be hardened due to moisture, and if it adheres and hardens on the hose 86 of the fertilizer application device 26 or the groove forming device 85 (see FIG. 1), it may develop into clogging. By using the warm and dry air around the oil cooler 78 as a conveying wind for conveying the fertilizer to the rice field by the fertilizer application device 26, the fluidity of the fertilizer is improved by the warm and dry air. Thereby, the clogging of the fertilizer in the hose 86, the grooving device 85 (refer FIG. 1) etc. is prevented, and the uniform fertilizer can be spread on a rice field.

[Another embodiment]
(1) In the above embodiment, an example in which the screwing portion 74 is configured by a nut fixed by welding or the like and the knob bolt 71 is used as an attachment member is shown, but a simple bolt-nut combination may be used, The structure which enables attachment or detachment of the dustproof net 42 using a tool instead of manually may be sufficient.

(2) In the above embodiment, the knob bolt 71 is used as the mounting member. However, the present invention is not limited to this. As the attachment member, a buckle-type connector capable of connecting the dustproof net 42 side and the fan shroud 41 side can also be used. In this case, a connecting base having a hook portion is provided on the dustproof net 42 side, and a mounting base having a stopper is provided on the fan shroud 41 side. A stopper is hooked on the hook portion, and the connecting base on the dust-proof net 42 side is drawn to the mounting base on the fan shroud 41 side by the connecting tool so as to be connected. In a state where the connecting base is connected to the mounting base, the forward movement of the dustproof net 42 is restricted by the connecting tool, and the dustproof net 42 is prevented from falling off. The connection can be easily released by operating the connector to the loose side and removing the stopper from the hook.

(3) In the above embodiment, the description has been given of the case in which the duct 79 for communicating air from the mission case 16 to the oil cooler 78 is provided, but the present invention is not limited thereto. Such a duct 79 may not be provided, and the oil cooler 78 may perform only natural heat dissipation.

(4) Although the above embodiment has been described with respect to the position where the radiator 38 and the oil cooler 78 are separated from each other, the position where the oil cooler 78 is provided may be a position near the radiator 38.

(5) Although the riding type rice transplanter among the paddy field working machines has been described in the above embodiment, the present invention is not limited to this and can be applied to other paddy field working machines such as a riding type direct seeding machine.

10: Ride type rice transplanter ("paddy field machine")
13: Traveling machine body 14: Engine 16: Mission case 18: Driver's seat 26: Fertilizer ("spreading device")
30: Bonnet 38: Radiator 39: Fin ("Heat exchange part")
41: Fan shroud ("support frame")
42: dust-proof net ("protection net")
71: Knob bolt ("mounting member")
75: Variable speed cooling fan ("cooling fan")
78: Oil cooler 79: Duct 87: Blower X: Left and right shaft core

Claims (4)

A bonnet that is arranged at the front part of the traveling machine body and can be opened and closed up and down around the left and right axis of the rear part,
An engine disposed inside the bonnet;
A radiator disposed on the side of the engine inside the bonnet;
A support frame disposed on the lateral side of the engine inside the bonnet,
A paddy field work machine in which a single attachment member capable of attaching and detaching a protective net covering the heat exchanging portion of the radiator to the support frame is provided in a portion of the support frame located above the front side of the radiator. . A mission case for storing the mission, disposed behind the engine;
A driver seat disposed behind the mission case;
An oil cooler for cooling the hydraulic oil in the transmission case, and
The paddy field work machine according to claim 1, wherein the oil cooler is disposed below the driver seat.   The paddy field machine according to claim 2, further comprising a duct for guiding air from a cooling fan provided in the transmission case to the oil cooler. A spraying device for spraying spray material is provided at the rear of the traveling machine body,
The paddy field work machine according to claim 2 or 3 provided with a blower which takes in the air of the peripheral part of said oil cooler, and blows it to said spraying device as conveyance wind which conveys said distribution material to a field surface.

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