Paddy working machine

Abstract

To improve support strength of a feeding device on a paddy working machine.SOLUTION: A paddy working machine includes: a machine body frame 12 provided along a direction; a step frame 36 for supporting a rear step 11 along a horizontal direction in a rear part of the machine body frame 12 and in a lower part relative to the rear step 11; a transverse frame 43 for supporting a feeding device along the horizontal direction in an upper part relative to the rear step; a right vertical frame 42 connected across a right part of the transverse frame 43 and a right part of the step frame 36; and a left vertical frame 42 connected across a left part of the transverse frame 43 and a left part of the step frame 36, wherein a delivery part 25 is connected to the transverse frame and the feeding device 6 is provided above the rear step 11.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a configuration of a supply device that supplies agricultural powders and granules (such as fertilizers, chemicals, seeds, etc.) to the paddy field surface in paddy field working machines such as riding type rice transplanters and riding type direct seeding machines.

Background Art

[0002] In a riding type rice transplanter, which is an example of a paddy field working machine, as disclosed in Patent Document 1, there is a type in which a rear step is provided behind the driver's seat, and a fertilizer application device (corresponding to the supply device) is provided above the rear step. The fertilizer application device has a storage part that stores fertilizer (corresponding to powders and granules), and a plurality of feeding parts that are connected to the lower part of the storage part and feed out the fertilizer in the storage part. The fertilizer fed out from the feeding part is supplied to the paddy field surface.

[0003] In Patent Document 1, a vertical frame is connected to the body frame and extends upward above the rear step. A horizontal frame is connected to the upper part of the vertical frame and extends rightward and leftward from the vertical frame. The feeding part of the fertilizer application device is connected to the horizontal frame, and the fertilizer application device (storage part and feeding part) is provided above the rear step.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a paddy field working machine, the operator often supplements granular materials to the storage part of the supply device by stepping on the rear step or standing on the rear step. In this case, the operator may push the right or left part of the supply device backward. There may be a situation where the operator supplements the granular materials from the bag containing the granular materials to the storage part of the supply device while placing the bag on the right or left part of the storage part of the supply device. When the above-mentioned state occurs, a large load is applied to one of the right or left parts of the supply device, so there is room for improvement in terms of improving the support strength of the supply device.

[0006] An object of the present invention is to improve the support strength of a supply device in a paddy field working machine.

Means for Solving the Problem

[0007] The paddy field working machine of the present invention includes a machine body frame provided along the front-rear direction, a step frame that supports the rear step along the left-right direction at the rear part of the machine body frame and below the rear step, a storage part that stores agricultural granular materials, and a plurality of feeding parts that are connected to the lower part of the storage part and feed out the granular materials of the storage part, and a supply device that supplies the granular materials fed out from the feeding parts to the paddy field surface. A horizontal frame that supports the supply device along the left-right direction is provided at a part above the rear step, a right vertical frame that is connected across the right part of the horizontal frame and the right part of the step frame, and a left vertical frame that is connected across the left part of the horizontal frame and the left part of the step frame are provided. The feeding part is connected to the horizontal frame, and the supply device is provided above the rear step.

[0008] According to the present invention, a machine body frame along the front-rear direction is provided, and the step frame is connected to the rear part of the machine body frame along the left-right direction, and the rear step is supported by the step frame. Since the step frame supports the rear step, it is configured to have sufficient strength.

[0009] According to the present invention, the right (left) vertical frame is connected across the right part (left part) of the horizontal frame and the right part (left part) of the step frame.

[0010] Thereby, the left and right central parts of the horizontal frame are supported by the body frame, and the right and left parts of the horizontal frame are supported by the body frame via the step frame, so that the horizontal frame is supported with sufficient strength. A feeding part is connected to the horizontal frame supported with sufficient strength, and since the feeding device is provided above the rear step, the supporting strength of the feeding device can be improved.

[0011] In the present invention, it is preferable that the right and left openings through which the right and left vertical frames pass are opened in the rear step.

[0012] According to the present invention, the vertical frame is connected across the horizontal frame and the step frame through the opening of the rear step, and the vertical frame is not provided so as to bypass the lateral outside of the right part (left part) of the rear step. Thereby, the vertical frame is not configured to be longer than necessary or bent more than necessary, so that the structure of the vertical frame can be simplified, which is advantageous in terms of improving the supporting strength of the feeding device.

[0013] In the present invention, it is preferable that the step frame is provided in front of the horizontal frame in plan view.

[0014] According to the present invention, since the step frame is provided in front of the horizontal frame, the vertical frame connected across the horizontal frame and the step frame can support both the vertical load and the front-rear load in a well-balanced manner, which is advantageous in terms of improving the supporting strength of the feeding device.

[0015] In the present invention, a blower for generating a conveying air for supplying the granular material fed out from the feeding section to the paddy field surface is provided, and the blower is preferably attached to the right or left part of the horizontal frame and provided behind the right or left vertical frame.

[0016] In the supply device, a blower for generating a conveying air for supplying the granular material fed out from the feeding section to the paddy field surface may be provided, and the blower may be provided on the right or left part of the supply device.

[0017] According to the present invention, since the blower is attached to the right (left) part of the horizontal frame supported with sufficient strength, the blower is stably supported. When the step frame is provided in front of the horizontal frame as described above, the vertical frame connected across the horizontal frame and the step frame is likely to be provided in front of directly below the right (left) part of the horizontal frame, and a space is likely to be generated directly below the right (left) part of the horizontal frame.

[0018] Thereby, the blower is easily attached to the right (left) part of the horizontal frame while being provided in the space directly below the right (left) part of the horizontal frame. Since the vertical frame is provided in front of the blower, when the operator replenishes the granular material, the blower is protected from the front by the second frame, so that damage to the blower can be prevented.

[0019] In the present invention, a duct for supplying the conveying air of the blower to the feeding section is provided, the duct is provided along the left - right direction across the blower and the feeding section at a position behind the right and left vertical frames, and it is preferable that a guard member for protecting the front of the blower is attached to the right or left vertical frame.

[0020] In the supply device, when the blower is provided on the right (left) part of the supply device, a duct for supplying the conveying air of the blower to the feeding section may be provided along the left - right direction. According to the present invention, since the duct is provided at a position behind the right and left vertical frames, when an operator replenishes the granular material, the right and left portions of the duct are protected from the front by the right and left vertical frames, so that damage to the duct can be prevented.

[0021] Also, according to the present invention, since the guard member is attached to the right (left) vertical frame, it is advantageous in terms of preventing damage to the blower.

[0022] In the present invention, there are provided a delivery amount changing portion provided at a position on the right or left portion of the horizontal frame for changing the delivery amount of the granular material in the delivery portion, and a housing case that houses the delivery amount changing portion and is connected to the right or left portion of the horizontal frame. It is preferable that the right second frame or the left second frame is connected to the right or left portion of the horizontal frame by being connected to the housing case.

[0023] In the supply device, a delivery amount changing portion for changing the delivery amount of the granular material in the delivery portion may be provided, and the delivery amount changing portion may be provided on the right or left portion of the supply device.

[0024] According to the present invention, since the housing case that houses the delivery amount changing portion is connected to the right (left) portion of the horizontal frame supported with sufficient strength, the delivery amount changing portion and the housing case are stably supported. According to the present invention, since the second frame is connected to the horizontal frame via the housing case and the housing case becomes a part of the second frame, the structure can be simplified.

[0025] In the present invention, it is preferable that a protection portion for protecting the supply device from the outside is provided on the vertical frame. Further, it is preferable that the protection portion has an extension portion extending in the left - right direction from the vertical frame.

[0026] According to the present invention, the protection part can prevent, for example, a seedling box or the like loaded on the machine body from approaching or contacting a fertilizer hose or the like. As a result, it is possible to prevent the fertilizer hose or the like from being damaged due to the influence from the outside of the loaded object or the like.

[0027] In the present invention, it is preferable to have an attachment part for connecting the vertical frame and the step frame, and the attachment part is configured to support the vertical frame from below and sandwich and fix the step frame from both the upper and lower sides.

[0028] According to the present invention, even if it is damaged, the connection with the vertical frame side is released first, and it can receive the load in the vertical direction for a certain period.

[0029] In the present invention, it is preferable to be provided with a right handrail part provided on the lateral outer side of the right part of the rear step and detachable from the right part of the step frame, and a left handrail part provided on the lateral outer side of the left part of the rear step and detachable from the left part of the step frame.

[0030] In a paddy field working machine, the right (left) handrail part may be provided on the lateral outer side of the right (left) part of the rear step. In a paddy field working machine, it may be loaded and transported on the truck bed of a truck or may be housed and transported in a container.

[0031] According to the present invention, the right (left) handrail part is detachable from the right (left) part of the step frame. By removing the right (left) handrail part, the overall left - right width of the paddy field working machine becomes smaller, so that the paddy field working machine can be easily loaded onto the truck bed or housed in a container.

[0032] In this case, since the lateral frame, the first frame, and the right (left) second frame are not connected to the right (left) handrail part, the right (left) handrail part is less affected by the lateral frame, the first frame, and the right (left) second frame, and the attachment and detachment of the right (left) handrail part can be performed. The left and right central portions of the horizontal frame are supported by the body frame, and the right and left portions of the horizontal frame are supported by the body frame via the step frame, so that the supply device is stably supported even during the transportation of the paddy field working machine.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0034] Figs. 1 to 10 show a riding type rice transplanter which is an example of a paddy field working machine. In Figs. 1 to 10, F indicates the front direction, B indicates the rear direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0035] (Overall Configuration of the Riding Type Rice Transplanter) As shown in FIG. 1, the body 3 is supported by the right and left front wheels 1 and the right and left rear wheels 2. The body 3 has right and left body frames 12 along the front-rear direction and a transmission case 13 connected to the front part of the body frame 12. The front wheels 1 are attached to the transmission case 13, and a rear axle case 14 to which the rear wheels 2 are attached is attached to the rear part of the body frame 12.

[0036] A link mechanism 4 is attached to the rear part of the body 3, and a seedling planting device 5 is attached to the rear part of the link mechanism 4. A fertilizer application device 6 (corresponding to a supply device) is attached across the rear part of the body 3 and the seedling planting device 5, and a soil tillage device 55 is attached to the front part of the seedling planting device 5.

[0037] A hydraulic cylinder 7 is connected across the rear part of the body 3 and the link mechanism 4. By expanding and contracting the hydraulic cylinder 7, the link mechanism 4 is lifted and lowered, and the seedling planting device 5 is lifted and lowered by the link mechanism 4.

[0038] A driver's seat 8, a steering wheel 9 for steering the front wheels 1, a floor 10, and a rear step 11 are provided on the body 3. Right and left support frames 15 are connected to the right and left parts of the front part of the body 3 and extend upward, and a spare seedling stand 16 is attached to the support frames 15.

[0039] (Configuration of the seedling planting device) As shown in FIG. 1, the seedling planting device 5 has a planting transmission case 17, a rotating case 18, planting arms 19, a float 20, and a seedling stand 21, and is configured in an 8-row planting type.

[0040] The rotating case 18 is rotatably attached to the right and left parts of the rear part of the planting transmission case 17, and a pair of planting arms 19 are attached to the rotating case 18. The seedling stand 21 on which seedlings are placed is supported by the planting transmission case 17 so as to be reciprocally movable along the left-right direction.

[0041] The power of the engine 22 mounted on the front part of the transmission case 13 is transmitted from an in-stock transmission mechanism (not shown) inside the transmission case 13 to the seedling planting device 5 via the transmission shaft 23, and then transmitted from the seedling planting device 5 to the soil tilling device 55.

[0042] As the machine body 3 moves forward, the soil tilling device 55 is rotationally driven to till the field surface, and the rotary case 18 is rotationally driven counterclockwise in FIG. 1, so that the planting arm 19 takes out seedlings from the seedling table 21 and plants them on the field surface.

[0043] (Configuration of the fertilizer applicator) As shown in FIGS. 1 to 4, the fertilizer applicator 6 includes a hopper 24 (corresponding to the storage part), four feeding parts 25, a blower 26, a furrow opener 27, a hose 28, and a feeding amount changing part 29.

[0044] The feeding part 25 is provided above the rear step 11, the hopper 24 is attached to the upper part of the feeding part 25, and fertilizer (corresponding to powder and granules) is stored in the hopper 24. The furrow opener 27 is attached to the float 20, and the hose 28 is connected across the feeding part 25 and the furrow opener 27.

[0045] As the machine body 3 moves forward, the fertilizer in the hopper 24 is fed into the hose 28 by the feeding part 25, the conveying air of the blower 26 is supplied to the lower part of the feeding part 25 and the hose 28, and the fertilizer is supplied to the furrow opener 27 through the hose 28. As the machine body 3 moves forward, the furrow opener 27 forms a furrow on the field surface, and the fertilizer is supplied from the furrow opener 27 to the furrow on the field surface.

[0046] (Configuration related to the machine body frame and step frame) As shown in FIGS. 2, 3, 5, and 6, the right and left vertical frames 30, 31, 32 are connected to the rear part of the machine body frame 12, and the right and left front and rear frames 33 are connected along the front and rear directions across the upper parts of the vertical frames 30, 31, 32. The floor frame 34 is connected to the machine body frame 12 along the left and right directions.

[0047] The front and rear step frames 35, 36 are connected to the front and rear frame 33 along the left - right direction, and a plurality of front - rear frames 37 are connected along the front - rear direction across the step frames 35, 36. The step frames 35, 36 are connected to the airframe frame 12 via the vertical frames 30, 31, 32 and the front - rear frame 33.

[0048] As shown in FIGS. 1 to 4, the driver's seat 8 is attached to the vertical frame 30. The floor 10 is attached to the airframe frame 12 and the floor frame 34. The rear step 11 is attached to the step frames 35, 36 and the front - rear frame 37.

[0049] The right and left handrail parts 38 are provided at the right and left lateral outer sides of the rear step 11. Mounting parts 36a are connected to the right and left parts of the step frame 36. The front - lower part 38a of the right (left) handrail part 38 is detachably attached to the right (left) part of the floor frame 34, and the rear - lower part 38b of the right (left) handrail part 38 is detachably attached to the right (left) mounting part 36a of the step frame 36. The right and left auxiliary steps 39 are attached to the handrail parts 38, and the right (left) auxiliary step 39 is provided adjacent to the right (left) lateral outer side of the rear step 11.

[0050] The rear frame 40 is attached across the right and left handrail parts 38. The rear frame 40 has a first part 40a along the left - right direction, a second part 40b along the left - right direction, and a third part 40c connected across the first part 40a and the second part 40b. The right (left) part of the first part 40a and the right (left) part of the second part 40b of the rear frame 40 are detachably attached to the right (left) handrail part 38.

[0051] After the first part 40a and the second part 40b of the rear frame 40 are removed from the handrail part 38, the front lower part 38a of the handrail part 38 is removed from the floor frame 34, and the rear lower part 38b of the handrail part 38 is removed from the attachment part 36a of the step frame 36, whereby the handrail part 38 and the auxiliary step 39 are removed from the riding type rice transplanter.

[0052] (Correspondence with claims in the overall configuration of the riding type rice transplanter) With the above configuration, a machine body frame 12 provided along the front - rear direction is provided. Step frames 35, 36 connected along the left - right direction are provided at the rear part of the machine body frame 12. A rear step 11 attached to the step frames 35, 36 is provided.

[0053] A storage part (hopper 24) for storing agricultural granular materials (fertilizer) and a plurality of feeding parts 25 connected to the lower part of the storage part (hopper 24) for feeding out the granular materials (fertilizer) of the storage part (hopper 24) are provided, and a supply device (fertilizer application device 6) for supplying the granular materials (fertilizer) fed out from the feeding part 25 to the paddy field surface is provided.

[0054] A right handrail part 38 provided horizontally outward on the right part of the rear step 11 and detachable from the right part of the step frame 36 is provided. A left handrail part 38 provided horizontally outward on the left part of the rear step 11 and detachable from the left part of the step frame 36 is provided.

[0055] (Configuration for supporting the fertilizer application device) As shown in FIGS. 6 - 10, the right and left first frames 41 are connected to the upper part of the vertical frame 32, extend upward above the rear step 11 behind the rear step 11.

[0056] A cross - frame 43 is connected to the upper part of the first frame 41 along the left - right direction. The cross - frame 43 is provided along the left - right direction at a position behind the step frames 35, 36 and above the rear step 11 in plan view and side view.

[0057] A storage case 45 formed by bending a plate material is provided, and the rear part of the storage case 45 is connected to the right part of the horizontal frame 43. A flat horizontal frame 44 is provided, the right part of the horizontal frame 44 is connected to the front part of the storage case 45, and the left part of the horizontal frame 44 is connected to the left part of the horizontal frame 43. The horizontal frame 44 is provided on the front side at a predetermined interval from the horizontal frame 43 and is provided along the left - right direction along the horizontal frame 43.

[0058] Right and left second frames 42 (corresponding to the "vertical frames" of the present invention) are provided, and the second frame 42 is formed in an angular shape in a side view. Right and left openings 11a (see FIG. 4) along the front - rear direction are opened in the right and left parts of the rear step 11.

[0059] The upper part of the right second frame 42 is connected to the storage case 45 and the right part of the horizontal frame 44, and the right second frame 42 extends downward through the right opening 11a (see FIG. 4) of the rear step 11. An attachment part 36b is connected to the right part of the step frame 36, and the lower part of the right second frame 42 is connected to the attachment part 36b of the step frame 36. The right second frame 42 is provided with a protection part 42a having an extension extending outward from the second frame 42 to the outside of the machine body (left - right direction). The protection part 42a is located in front of the fertilizer application device 6 and protects the fertilizer application device 6 by preventing the loaded objects such as seedling boxes from approaching or contacting the fertilizer hose or the like. The left second frame 42 may be similarly provided with the protection part 42a.

[0060] The upper part of the left second frame 42 is connected to the left part of the horizontal frame 44, the left second frame 42 extends downward through the left opening 11a (see FIG. 4) of the rear step 11, and the lower part of the left second frame 42 is connected to the left attachment part 36a of the step frame 36. A channel - shaped guard member 46 is connected to the left second frame 42 and extends outward to the left from the left second frame 42.

[0061] As a result, the right second frame 42 is connected to the right part of the horizontal frame 43 via the housing case 45 and is connected to the right part of the step frame 36 via the mounting part 36b. Here, the mounting part 36b supports the right vertical frame 42 from below and sandwiches and fixes the step frame 36 from both the upper and lower sides. The left second frame 42 is connected to the left part of the horizontal frame 43 via the left part of the horizontal frame 44 and is connected to the left part of the step frame 36 via the left mounting part 36a.

[0062] The right and left second frames 42 extend forward from the horizontal frame 43 (housing case 45) in a side view, pass through the opening 11a (see FIG. 4) of the rear step 11, and extend downward toward the mounting parts 36a and 36b of the step frame 36.

[0063] (Correspondence with the claims in the configuration for supporting the fertilizer applicator) With the above configuration, a first frame 41 is provided that is connected to the body frame 12 and extends upward above the rear step 11. A horizontal frame 43 is provided that is connected along the left - right direction to the portion of the first frame 41 above the rear step 11. A right second frame 42 is provided that is connected across the right part of the horizontal frame 43 and the right part of the step frame 36. A left second frame 42 is provided that is connected across the left part of the horizontal frame 43 and the left part of the step frame 36.

[0064] Right and left openings 11a through which the right second frame 42 and the left second frame 42 pass are opened in the rear step 11. The step frame 36 is provided in front of the horizontal frame 43 in a plan view.

[0065] (Mounting state of the fertilizer applicator) As shown in FIGS. 5 to 10, in the fertilizer applicator 6, the feeding section 25 is provided between the horizontal frame 43 and the horizontal frame 44 and is connected to the horizontal frame 43 and the horizontal frame 44. The hopper 24 is attached over the upper part of the feeding section 25 and is located in front of the rear frame 40.

[0066] The bracket 47 is connected to the left part of the horizontal frame 43, and the blower 26 is attached to the bracket 47. The blower 26 is attached to the left part of the horizontal frame 43 via the bracket 47, and the left second frame 42 and the guard member 46 are located in front of the blower 26.

[0067] The air duct 48 (corresponding to the duct) is provided along the left - right direction and is connected to the front part of the lower part of the feeding section 25. The left part of the air duct 48 is connected to the blower 26 via the air switching section 50.

[0068] The discharge duct 49 is provided along the left - right direction at a position in front of the air duct 48 and is connected to the front part of the feeding section 25. The left part of the discharge duct 49 is connected to the air switching section 50. The right (left) second frame 42 is located above and in front of the right (left) part of the air duct 48 and the right (left) part of the discharge duct 49 in side view and plan view.

[0069] The feeding amount changing section 29 is attached to the right part of the horizontal frame 43, and the upper part of the feeding amount changing section 29 is housed in the housing case 45. The housing case 45 is also a display section for displaying the feeding amount by the feeding amount changing section 29 described later.

[0070] (Correspondence with the claims in the mounting state of the fertilizer applicator) With the above configuration, the feeding section 25 is connected to the horizontal frame 43, and the supply device (fertilizer applicator 6) is provided above the rear step 11.

[0071] A blower 26 is provided to generate a conveying air flow for supplying the granular material (fertilizer) fed out from the feeding section 25 to the field surface. The blower 26 is attached to the right or left part of the horizontal frame 43 and is provided behind the right second frame 42 or the left second frame 42. A guard member 46 for protecting the front of the blower 26 is attached to the right second frame 42 or the left second frame 42.

[0072] A duct (air supply duct 48) for supplying the conveying air flow of the blower 26 to the feeding section 25 is provided. The duct (air supply duct 48) is provided along the left - right direction across the blower 26 and the feeding section 25 at a position behind the right second frame 42 and the left second frame 42.

[0073] A feeding amount changing section 29 is provided at the right or left part of the horizontal frame 43 to change the feeding amount of the granular material (fertilizer) in the feeding section 25. A housing case 45 for housing the feeding amount changing section 29 and connected to the right or left part of the horizontal frame 43 is provided. The right second frame 42 or the left second frame 42 is connected to the housing case 45 and thus is connected to the right or left part of the horizontal frame 43.

[0074] (Operating state of the fertilizer application device) As shown in FIGS. 7, 8, and 9, the power of the engine 22 is transmitted from a transmission mechanism (not shown) inside the transmission case 13 to the transmission shaft 51. The power of the transmission shaft 51 is converted into vertical reciprocating motion and transmitted to the link rod 52. The power from the link rod 52 is converted into forward and reverse reciprocating rotation and transmitted to the transmission shaft 53. The power from the transmission shaft 53 is transmitted to the feeding amount changing section 29.

[0075] In the delivery amount changing unit 29, the power of the transmission shaft 53 is converted into unidirectional rotational power and shifted, and is transmitted from the transmission shaft 54 to the delivery unit 25, and the delivery unit 25 is driven by the power of the transmission shaft 54. The conveying air of the blower 26 passes through the air supply duct 48 from the air supply switching unit 590 and is supplied to the lower part of the delivery unit 25 and the hose 28.

[0076] The fertilizer in the hopper 24 is delivered to the hose 28 by the delivery unit 25, the conveying air of the blower 26 is supplied to the lower part of the delivery unit 25 and the hose 28, and the fertilizer is supplied to the furrow opener 27 through the hose 28 by the conveying air and is supplied from the furrow opener 27 to the furrows on the field surface. By changing the speed of the power of the transmission shaft 54 by the delivery amount changing unit 29, the delivery amount by the delivery unit 25 is changed in magnitude.

[0077] When the work of one day is completed or the like, the operator operates the air supply switching unit 50 so that the conveying air of the blower 26 is supplied to the discharge duct 49, and sets a state in which the fertilizer is discharged from the delivery unit 25 to the discharge duct 49. Thereby, the operator discharges the fertilizer remaining in the hopper 24 to the discharge duct 49 and collects it from the discharge port on the right part of the discharge duct 49 into a collection container or a collection bag.

[0078] (First alternative embodiment of the invention) Instead of the fertilizer application device 6, a chemical agent supply device (not shown) for supplying a chemical agent (corresponding to a powder or granular material) to the field surface may be equipped as the supply device. Instead of the fertilizer application device 6, a seeding device (not shown) for supplying seeds (corresponding to a powder or granular material) to the field surface may be equipped as the supply device.

[0079] (Second alternative embodiment of the invention) The blower 26 may be attached to the right part of the horizontal frame 43, and the delivery amount changing unit 29 and the housing case 45 may be attached to the left part of the horizontal frame 43.

[0080] (Third alternative embodiment of the invention) The fertilizer applicator 6 may be divided into two parts on the left and right, and the blower 26 may be arranged in the center. In this case, a total of four second frames 42 are required for the left and right ends and the center part respectively. In this case, the two second frames 42 in the center part may also serve as the first frame 41.

Industrial Applicability

[0081] The present invention can be applied not only to riding type rice transplanters, but also to paddy field working machines equipped with supply devices for supplying agricultural powders and granules (fertilizers, chemicals, seeds, etc.) to the paddy field surface, and can also be applied to automatic paddy field working machines that automatically travel without a driver and radio control type paddy field working machines.

Explanation of Reference Numerals

[0082] 6 Fertilizer applicator (supply device) 11 Rear step 11a Opening 12 Machine body frame 24 Hopper (storage part) 25 Feeding part 26 Blower 29 Feeding amount changing part 36 Step frame 38 Handrail part 41 First frame 42 Second frame (vertical frame) 43 Cross frame 45 Storage case 46 Guard member 48 Air duct (duct)

Claims

1. A body frame provided along the front-rear direction, A step frame that supports the rear step along the left-right direction at a portion below the rear part of the body frame and below the rear step, A storage part for storing agricultural powder and granules, and a plurality of feeding parts connected to the lower part of the storage part for feeding out the powder and granules in the storage part, and a feeding device for feeding the powder and granules fed out from the feeding parts to the field surface are provided, A horizontal frame that supports the feeding device along the left-right direction at a portion above the rear step, A right vertical frame connected across the right part of the horizontal frame and the right part of the step frame, A left vertical frame connected across the left part of the horizontal frame and the left part of the step frame are provided, A paddy field working machine in which the feeding part is connected to the horizontal frame and the feeding device is provided above the rear step.

2. The paddy field working machine according to claim 1, wherein right and left openings through which the right and left vertical frames pass are opened in the rear step.

3. The paddy field working machine according to claim 1, wherein the step frame is provided in front of the horizontal frame in plan view.

4. A blower for generating a conveying air flow for feeding the powder and granules fed out from the feeding part to the field surface is provided, The paddy field working machine according to claim 3, wherein the blower is attached to the right or left part of the horizontal frame and is provided behind the right or left vertical frame.

5. A duct for supplying the conveying air flow of the blower to the feeding part is provided, The duct is provided along the left-right direction across the blower and the feeding part at a position behind the right and left vertical frames, The paddy field working machine according to claim 4, wherein a guard member for protecting the front of the blower is attached to the right or left vertical frame.

6. A feeding amount changing part provided at the right or left part of the horizontal frame for changing the feeding amount of the powder and granules in the feeding part, A housing case that houses the feeding amount changing part and is connected to the right or left part of the horizontal frame is provided, The paddy field working machine according to claim 1, wherein the right or left vertical frame is connected to the housing case and thus is connected to the right or left part of the horizontal frame.

7. The paddy field working machine according to claim 1, wherein a protection part for protecting the supply device from the outside is provided on the vertical frame.

8. The paddy field working machine according to claim 7, wherein the protection part has an extension part extending in the left - right direction from the vertical frame.

9. The paddy field working machine according to claim 1, having an attachment part for connecting the vertical frame and the step frame, wherein the attachment part supports the vertical frame from below and is configured to sandwich and fix the step frame from both the upper and lower sides.

Images