JP2020202805A - Paddy work machine - Google Patents

Abstract

To improve operability of a supply transmission in a paddy work machine that is configured so as to supply agricultural materials such as liquid fertilizer or chemicals into a paddy field.SOLUTION: A paddy work machine includes a storage tank 71 for storing liquid agricultural materials, a supply pump for feeding the agricultural materials of the storage tank 71, and a supply nozzle for supplying the agricultural materials being fed from the supply pump into the paddy field. There is included a supply transmission 91 that is arranged in the lower side to a floor 49, and is capable of changing a feeding amount of the supply pump by shifting the power transmitted to the supply pump. Shift gears 107, 108 are arranged outside to the right or left side part 49a of the floor 49, in plan view, and a linkage mechanism 109 connected over the shift gears 107, 108 and a supply transmission 91 is arranged in the lower side to the floor 49, and the shift gears 107, 108 are operated, and thereby the supply transmission 91 is operated through the linkage mechanism 109.SELECTED DRAWING: Figure 2

Description

The present invention relates to a configuration for supplying agricultural materials such as liquid fertilizers and chemicals to a paddy field in a paddy field working machine such as a riding type rice transplanter or a riding type direct sowing machine.

As disclosed in Patent Document 1, some passenger-type rice transplanters, which are examples of paddy field work machines, are configured to supply liquid fertilizer to the rice field surface while planting seedlings. In No. 1, a storage tank for storing fertilizer, a supply pump for delivering fertilizer from the storage tank, and a supply nozzle for supplying fertilizer delivered from the supply pump to the paddy field are provided.

In Patent Document 1, a supply transmission that shifts the power transmitted to the supply pump is provided, and the rotation speed of the supply pump can be changed by the supply transmission to change the feeding amount of the supply pump.

Japanese Unexamined Patent Publication No. 2008-295347

In Patent Document 1, since the supply transmission is arranged below the floor, there is room for improvement in terms of operability of operating the supply transmission to change the feeding amount of the supply pump.

An object of the present invention is to improve the operability of a supply transmission in a paddy field working machine configured to be able to supply agricultural materials such as liquid fertilizers and chemicals to a paddy field.

The paddy field working machine of the present invention has a floor supported by the machine body on which an operator can board, a storage tank for storing liquid agricultural materials, a supply pump for feeding the agricultural materials in the storage tank, and a supply pump. A supply nozzle that supplies the collected agricultural materials to the field surface and a supply that is arranged below the floor and can change the feeding amount of the supply pump by shifting the power transmitted to the supply pump. A speed change operating tool provided with a speed change device and artificially operated is arranged outside the right or left lateral portion of the floor in a plan view, and the speed change control tool and the supply speed change device are provided. The linking mechanism connected over the entire surface is arranged below the floor, and the speed change operating tool is operated to operate the supply speed change device via the linking mechanism.

According to the present invention, in a paddy field working machine provided with a storage tank for storing agricultural materials, a supply pump for delivering agricultural materials in the storage tank, and a supply nozzle for supplying agricultural materials delivered from the supply pump to the field surface. When the supply transmission that shifts the power transmitted to the supply pump is located below the floor, the artificially operable speed change controller is located on the right or left side of the floor in plan view. It is located on the outside.

According to the present invention, since the shift control tool is not covered by the floor, the operator operates the shift control tool by reaching to the right or left side of the floor without being affected by the floor. This is possible, and the operation of the speed change controller is transmitted to the supply speed changer via the linkage mechanism to operate the supply speed changer.
As a result, the operability of the supply transmission is improved, and the operability of changing the feeding amount of the supply pump is improved.

In the present invention, the storage tank is arranged outside the lateral portion of the floor on the side of the speed change operation tool in a plan view, and the speed change operation tool is arranged in a plan view of the side portion of the floor and the storage. It is preferable that it is arranged between the tank and the tank.

According to the present invention, when the storage tank is arranged outside the right or left horizontal portion of the floor in a plan view, the speed change controller is arranged between the horizontal portion of the floor and the storage tank in a plan view. Therefore, the speed change operation tool is protected by the storage tank.
As a result, the state in which the speed change operating tool is operated in contact with another object during the work running and the feeding amount of the supply pump is changed is reduced, and the reliability of the supply of agricultural materials is improved.

According to the present invention, the operator can comfortably operate the speed change operation tool by reaching between the side surface of the floor and the storage tank, so that the operability of the supply transmission is maintained in a good state. Has been done.

In the present invention, the front and rear support frames for supporting the spare seedling stand are arranged outside the lateral portion of the floor on the shift control tool side in a plan view, and the shift control tool is flat. Visually, it is preferable that the support frame is arranged between the front support frame and the rear support frame.

According to the present invention, when the front and rear support frames for supporting the reserve seedling stand are arranged outside the right or left lateral portion of the floor in a plan view, the speed change operating tool is arranged in front in a plan view. It is arranged between the support frame and the rear support frame, and is protected by the front and rear support frames.
As a result, the state in which the speed change operating tool is operated in contact with another object during the work running and the feeding amount of the supply pump is changed is reduced, and the reliability of the supply of agricultural materials is improved.

According to the present invention, the operator can comfortably operate the speed change operation tool by reaching between the front and rear support frames, so that the operability of the supply transmission is maintained in a good state. There is.

In the present invention, the storage tank is arranged outside the lateral portion of the floor on the speed change operation tool side in a plan view, and the support frames before and after supporting the spare seedling stand are in a plan view. The speed change operating tool is arranged between the horizontal portion of the floor and the storage tank, and the speed change operating tool is arranged between the horizontal portion of the floor and the storage tank in a plan view, and the front support. It is preferable that it is arranged between the frame and the support frame later.

According to the present invention, when the front and rear support frames for supporting the storage tank and the reserve seedling stand are arranged outside the right or left horizontal portion of the floor in a plan view, the speed change controller is flat. Visually located between the side of the floor and the storage tank, and between the front and rear support frames, the speed change controls are protected by the storage tank, front and rear support frames. It is in a state of being.
As a result, the state in which the speed change operating tool is operated in contact with another object during the work running and the feeding amount of the supply pump is changed is reduced, and the reliability of the supply of agricultural materials is improved.

According to the present invention, the operator can comfortably operate the speed change operating tool by reaching between the side of the floor and the storage tank, and between the front and rear support frames, so that the supply speed change can be performed. The operability of the device is maintained in good condition.

In the present invention, it is formed so as to be located on the left and right center side of the machine body in the lateral portion of the front part of the floor on the gear shifting operator side with respect to the lateral portion of the rear portion of the floor on the gear shifting operator side. It is preferable that the speed change operation tool and the support frame are arranged outside the entrance portion in a plan view.

According to the present invention, since the speed change operation tool and the support frame are arranged along the entrance portion of the front portion of the floor, it is advantageous in terms of compactification in the vicinity of the front portion of the floor.

In the present invention, the speed change operating tool and the support frame are arranged on the left and right center sides of the machine body in a plan view with respect to a virtual line extending in the front-rear direction from a lateral portion on the rear part of the floor. It is preferable that it is.

According to the present invention, the speed change operating tool and the support frame are in a state of being inserted into the entrance portion of the front portion of the floor in a plan view, which is advantageous in terms of compactification in the vicinity of the front portion of the floor.

In the present invention, it is preferable that the left-right center side portion of the storage tank is arranged on the left-right center side of the machine body with respect to the virtual line in a plan view.

According to the present invention, in addition to the speed change operation tool and the support frame being inserted into the entrance portion at the front portion of the floor in a plan view, the storage tank is also brought close to the entry portion at the front portion of the floor. Since it is arranged, it is advantageous in terms of compactness near the front part of the floor.

In the present invention, the storage tank is arranged outside with respect to both the right and left lateral portions of the floor in plan view, and the support frame is located on the right lateral portion and right of the floor in plan view. A plurality of the supply pumps are connected to the lower part of the storage tank on the right and left, arranged between the storage tank on the left side of the floor and the storage tank on the left side. A feed pump operating mechanism capable of stopping and operating a selected portion of the feed pumps among the plurality of feed pumps is provided with the support on the opposite side of the shift control tool in the right and left support frames. It is preferable that it is supported by the frame.

When a plurality of supply pumps are equipped, a supply pump operation mechanism capable of stopping and operating some of the selected supply pumps may be provided.
According to the present invention, right and left storage tanks, right and left support frames are arranged outside of both the right and left sides of the floor in plan view, and multiple supply pumps are right and left. When connected to the bottom of the storage tank, the supply pump operating mechanism is supported by a support frame on the opposite side of the speed change control of the right and left support frames.

As a result, the speed change operation tool and the supply pump operation mechanism are arranged on opposite sides to the floor, so that the operator is less affected by the supply pump operation mechanism and operates the speed change operation tool. can do.

In the present invention, the reinforcing frames for reinforcing the right and left support frames are connected to the right support frame and the left support frame through the lower part of the airframe, and are connected to the supply pump operating mechanism. , The right and left supply pumps are connected to the supply pump on the speed change operation tool side, and some of the supply pumps are provided with wires for stopping the supply pumps. It is preferable that it is connected to the reinforcing frame and arranged through the lower part of the airframe.

According to the present invention, the reinforcing frame is connected to the right support frame and the left support frame through the lower part of the airframe, and the right and left support frames are reinforced by the reinforcing frame.

According to the present invention, in a state where the speed change operation tool and the supply pump operation mechanism are arranged on opposite sides to the floor, a wire is connected over the supply pump operation mechanism and the supply pump on the speed change operation tool side. If so, the wires are connected to the reinforcement frame and placed through the bottom of the fuselage.
As a result, the reinforcing frame is also used as the support member of the wire, which is advantageous in terms of simplifying the support structure of the wire.

In the present invention, the front axle case that supports the front wheels is arranged on the rear side with respect to the support frame in a side view, and another reinforcing frame is connected to the reinforcing frame and the front axle case. It is preferable to have.

According to the present invention, in addition to connecting the reinforcing frame over the right support frame and the left support frame, another reinforcing frame is connected over the reinforcing frame and the front axle case, so that it is right. And the left support frame is further reinforced.

It is a right side view of a passenger-type rice transplanter. It is a top view near the floor. It is the right side view near the shift lever and the right storage tank. It is a front view near the storage tank on the right. It is a right side view in the vicinity of a shift lever and a continuously variable transmission. It is a top view in the vicinity of a shift lever and a supply transmission. It is an exploded perspective view of the vicinity of a shift lever and a supply transmission. It is the schematic which shows the transmission system from a supply transmission to a supply pump, and the connection state of a supply pump and a supply nozzle. It is a vertical sectional rear view in the vicinity of a supply pump operation mechanism. It is the left side view of the vertical section in the vicinity of the supply pump operation mechanism. It is sectional drawing of a mission case. It is sectional drawing of a mission case. It is sectional drawing of a mission case. It is the schematic which shows the linkage state of a control device and each part, and the linkage state of a supply pump operation mechanism and a supply clutch. It is sectional drawing of the mission case in 1st alternative embodiment of the invention.

1 to 15 show a passenger-type rice transplanter which is an example of a paddy field working machine. In FIGS. 1 to 15, F indicates a forward direction, B indicates a backward direction, and U indicates an upward direction. , D indicates a downward direction, R indicates a right direction, and L indicates a left direction.

(Overall configuration of passenger rice transplanter)
As shown in FIG. 1, in a passenger-type rice transplanter, a link mechanism 4 is supported so as to be swingable up and down at the rear portion of an airframe 3 provided with right and left front wheels 1 and right and left rear wheels 2. A hydraulic cylinder 5 that extends to the rear side and operates the link mechanism 4 up and down is provided, and the seedling planting device 6 is supported at the rear portion of the link mechanism 4.

As shown in FIGS. 1 and 2, the airframe 3 has a right and left airframe frame 7 arranged along the front-rear direction, a mission case 8 connected to the front portion of the airframe frame 7, and a front portion of the mission case 8. It has a support frame 9 and the like connected to.

The right and left front axle cases 10 are connected to the right and left portions of the mission case 8, and the right and left front wheels 1 are supported by the right and left front axle cases 10. The rear axle case 11 is supported by the rear portion of the fuselage frame 7, and the right and left rear wheels 2 are supported by the rear axle case 11.

(Configuration of seedling planting device)
As shown in FIGS. 1 and 8, the seedling planting device 6 is provided with a planting transmission case 12, a rotating case 13, a planting arm 14, a float 15, a seedling stand 16, and the like.

The three planting transmission cases 12 are arranged side by side in the left-right direction, and the three floats 15 are arranged below the planting transmission case 12. The rotary case 13 is rotatably supported on the right and left portions of the rear portion of the planting transmission case 12, and the planting arms 14 are supported on both ends of the rotary case 13. The seedling stand 16 is supported so as to be movable in the left-right direction.

As the seedling stand 16 is laterally driven in the left-right direction, the rotary case 13 is rotationally driven, and the planting arm 14 alternately takes out seedlings from the lower part of the seedling stand 16 and plants them on the field surface. As described above, the seedling planting device 6 is configured in a six-row planting type in which seedlings are planted in the first to sixth planting rows L1, L2, L3, L4, L5, and L6.

(Transmission system to front and rear wheels)
As shown in FIGS. 1 and 8, the engine 17 is supported by the support frame 9, and the muffler 67 of the engine 17 is arranged obliquely downward along the right portion of the support frame 9.

As shown in FIGS. 8 and 11, a hydrostatic type continuously variable transmission 18 for traveling is connected to the upper part of the left side of the transmission case 8, and the output shaft 17a of the engine 17 and the input of the continuously variable transmission 18 are input. A transmission belt 19 is attached over the shaft 18a. The continuously variable transmission 18 is configured to be continuously variable on the forward side and the reverse side with the neutral position in between.

As shown in FIG. 11, the hydraulic pump 20 is connected to the upper part of the right side of the transmission case 8, and the transmission shaft 21 is connected to the input shaft 18a of the continuously variable transmission 18 and the hydraulic pump 20. There is. Inside the transmission case 8, the transmission shaft 22 is connected to the output shaft 18b of the continuously variable transmission 18, and the low speed gear 23 and the high speed gear 24 are connected to the transmission shaft 22.

A shift gear 26 is rotatably and slidably supported integrally with the transmission shaft 25 by a spline structure on the transmission shaft 25 supported in parallel with the transmission shaft 22. When the shift gear 26 is slid and meshes with the low speed gear 23 and the high speed gear 24, the power of the output shaft 18b of the continuously variable transmission 18 is changed from the transmission shaft 22 to two high and low stages and transmitted to the transmission shaft 25. Will be done.

The right and left front wheel transmission shafts 27 are supported by the right and left front axle cases 10, and a front wheel differential mechanism 28 is provided between the right and left front wheel transmission shafts 27. The transmission gear 29 connected to the transmission shaft 25 and the transmission gear 30 connected to the front wheel differential mechanism 28 are in mesh with each other, and the power of the transmission shaft 25 is the transmission gears 29, 30, the front wheel differential mechanism 28 and the front wheel transmission. It is transmitted to the right and left front wheels 1 via the shaft 27.

The output shaft 31 is supported rearward from the rear portion of the mission case 8, and the bevel gear 32 connected to the front wheel differential mechanism 28 and the bevel gear 31a formed on the output shaft 31 are in mesh with each other. The power of the transmission shaft 25 is transmitted to the rear axle case 11 via the transmission gear 30, the bevel gear 32 and the output shaft 31, and right and left via the transmission shaft (not shown) inside the rear axle case 11. It is transmitted to the rear wheel 2.

A brake 33 is provided on the output shaft 31. When the brake 33 is braked, the front wheels 1 are braked via the front wheel differential mechanism 28 and the front wheel transmission shaft 27, and the rear wheels 2 are braked via the output shaft 31.

(Transmission system to seedling planting device)
As shown in FIGS. 8, 11 and 12, the hydrostatic type continuously variable transmission 34 for the seedling planting device 6 is connected to the upper part of the right side of the mission case 8, and the input shaft of the continuously variable transmission 34 is connected. The 34a and the transmission shaft 22 are connected. The continuously variable transmission 34 can continuously change gears to the forward rotation side, and the planting interval (between stocks) by the planting arm 14 can be set and changed steplessly.

As shown in FIG. 12, inside the transmission case 8, the transmission shafts 35 and 37 are supported in parallel with the transmission shaft 22, and the output shaft 34b of the continuously variable transmission 34 and the transmission shaft 35 are connected to each other. .. The cylindrical transmission shaft 36 is rotatably supported by the transmission shaft 35, and the transmission gear 38 is rotatably supported by the transmission shaft 37. The transmission gear 35a formed on the transmission shaft 35 and the transmission gear 38 are occluded, and the transmission gear 39 and the transmission gear 38 connected to the transmission shaft 36 are occluded.

The power of the output shaft 18b of the continuously variable transmission 18 is transmitted from the transmission shaft 22 to the continuously variable transmission 34, and the power of the output shaft 18b of the continuously variable transmission 18 is changed by the continuously variable transmission 34. The power of the output shaft 34b of the continuously variable transmission is transmitted to the transmission shaft 36 via the transmission shaft 35 (transmission gear 35a) and the transmission gears 38 and 39.

When the reverse (reverse) power of the continuously variable transmission 18 is transmitted to the continuously variable transmission 34, the relief valve (not shown) inside the continuously variable transmission 34 is opened to open the continuously variable transmission 34. Is in a stopped state, and the reverse (reverse) power is not output from the continuously variable transmission 34.

The four interstock gears 40 and 41 are connected to the transmission shaft 36, the four interstock gears 42 and 43 are rotatably attached to the transmission shaft 37, the interstock gears 40 and 42 are occluded, and the interstock gear 41 , 43 are occluded.

The inter-stock gears 40 and 42 are constant velocity gears in which the centers of the inter-stock gears 40 and 42 coincide with the centers of the transmission shafts 36 and 37. The set of inter-stock gears 40 and 42 is a set of constant speed gears that shifts the power of the transmission shaft 36 and transmits it to the transmission shaft 37 while maintaining the angular velocity in one rotation of the power of the transmission shaft 36 at a constant speed. It becomes.

The inter-stock gears 41 and 43 are eccentric gears in which the centers of the inter-stock gears 41 and 43 are deviated from the centers of the transmission shafts 36 and 37. The set of inter-stock gears 41 and 43 is a set of eccentric gears that transmit the power of the transmission shaft 36 to the transmission shaft 37 at the same rotation speed while shifting the angular velocity in one rotation of the power of the transmission shaft 36 to high or low. Will be.

A slit 37a is formed in the transmission shaft 37, and a flat plate-shaped key member 44 is inserted into the slit 37a of the transmission shaft 37. The key member 44 can rotate integrally with the transmission shaft 37, and can slide in the axial direction of the transmission shaft 37 (left-right direction in FIG. 12).

The key member 44 is moved along the axis direction of the transmission shaft 37, and the key member 44 engages with the inner diameter portion of the inter-stock gear 42, 43, so that the inter-stock gear 42, 43 with which the key member 44 is engaged is engaged. However, it is in a state of rotating integrally with the transmission shaft 37.

The output shaft 45 is rearwardly supported by the rear portion of the transmission case 8, and the bevel gear 46 connected to the transmission shaft 37 and the bevel gear 47 rotatably attached to the output shaft 45 are in mesh with each other. A planting clutch 48 is provided between the bevel gear 47 and the output shaft 45.

The continuously variable transmission 34 engages the key member 44 with the inter-stock gear 42 when the inter-stock is changed within the normal inter-stock range. When the continuously variable transmission 34 sets the sparsely planted interstock, the key member 44 is engaged with one of the three interstock gears 43.

As a result, the power of the transmission shaft 36 is transmitted to the output shaft 45 via the inter-stock gears 40, 42 or the inter-stock gears 41, 43, the transmission shaft 37, the bevel gears 46, 47, and the planting clutch 48, and the seedlings are transmitted from the output shaft 45. It is transmitted to the planting device 6.

(Floor composition)
As shown in FIGS. 1 and 2, a floor 49 on which an operator can board is supported by the machine body 3. A driver's seat 50 is provided at the rear of the floor 49, a cover 51 for covering the engine 17 is provided at the front of the floor 49, and a steering handle 52 for steering and operating the front wheel 1 is provided at the upper part of the cover 51. Has been done.

The floor 49 extends from directly below the driver's seat 50 to areas on the right and left sides of the cover 51. As described below, the width of the front portion of the floor 49 is narrower than the width of the rear portion of the floor 49 in a plan view.

The horizontal portion 49a on the right side of the front part of the floor 49 is larger than the right horizontal portion 49b (virtual line K1 extending in the front-rear direction from the right horizontal portion 49b on the rear part of the floor 49) at the rear part of the floor 49. It is formed so as to be located on the left and right center side (left side), and the right entrance portion 53 is formed on the right lateral portion 49a in the front portion of the floor 49.

The lateral portions 49a and 49b on the right side of the front portion and the rear portion of the floor 49 are on the shift lever 107, 108 side described later (configuration of the shift lever in the shift operation of the supply transmission) in the front portion and the rear portion of the floor 49. The lateral portions 49a and 49b of the above.

The left lateral portion 49a at the front of the floor 49 is more than the left lateral portion 49b at the rear of the floor 49 (virtual line K2 extending in the front-rear direction from the left lateral portion 49b at the rear of the floor 49). It is formed so as to be located on the left and right center side (right side), and a left entrance portion 53 is formed in a left lateral portion 49a in the front portion of the floor 49.

The step 54 for getting on and off is provided so as to be located below the floor 49 in a side view and outside the right and left horizontal portions 49b in the rear part of the floor 49 in a plan view. The frame 55, which functions as a handrail when getting on and off, is provided so as to be located outside the right and left horizontal portions 49b at the rear portion of the floor 49 in a plan view.

As shown in FIGS. 2, 3 and 4, the right and left support frames 64 for supporting the floor 49 are arranged in the left-right direction along the lower side of the front-rear middle portion of the floor 49 and connected to the front axle case 10. It is arranged in the front-rear direction along the lower side of the right and left horizontal portions 49b at the rear portion of the floor 49.

The right and left support frames 65 that support the front part of the floor 49 are connected to the right part and the left part of the front part of the support frame 9, and extend to the right side and the left side, and extend to the rear side. , The rear part of the support frame 65 is connected to the support frame 64.

Right and left support frames 66 that support the front of the floor 49 are connected to the support frame 65 and extend to the right and left to underneath the right and left lateral 49a in the front of the floor 49. It extends to the rear side along the rear side, and the rear portion of the support frame 66 is connected to the support frame 64 and the front axle case 10.

(Structure of support frame for spare seedling stand)
As shown in FIGS. 1 to 4, the lower part of the support frame 56 in front of the right (left) is connected to the right part (left part) of the front part of the support frame 9, and the support in front of the right (left). The frame 56 extends outward and extends upward through the position of the right (left) entry 53. The right support frame 56 is arranged on the lower side of the muffler 67 along the left-right direction.

The lower part of the support frame 57 after the right (left) is connected to the front axle case 10, and the support frame 57 after the right (left) extends outward, and the entrance portion 53 of the right (left) It extends upward through the position.

As shown in FIG. 1, the upper part of the front support frame 56 and the upper part of the rear support frame 57 are connected, and the support frame 58 along the left-right direction is the right and left support frames 56, 57. It is connected over the top. The GPS antenna 59 for automatic steering is connected to the left and right central portions of the support frame 58.

Spare seedling pedestals 60 are attached to the upper and lower intermediate portions of the front and rear support frames 56 and 57. Three spare seedling pedestals 60 are provided, and as shown in FIG. 1, the three spare seedling pedestals 60 are folded so as to be overlapped with each other, and the three spare seedling pedestals 60 are provided. It is possible to switch to a state in which it is unfolded and arranged in a row along the front-back direction.

(Structure of reinforcement of support frame of spare seedling stand)
As shown in FIGS. 2, 3 and 4, the reinforcing frame 61 is arranged along the left-right direction, is connected to the lower part of the support frame 9 (airframe 3), and the lower side is arranged in the left-right direction with respect to the muffler 67. The right and left brackets 61a of the reinforcing frame 61 are connected to the right and left front support frames 56.

As a result, the reinforcing frame 61 that reinforces the right and left front support frames 56 extends the lower part of the support frame 9 (airframe 3) over the right front support frame 56 and the left front support frame 56. It is connected through.

The front axle case 10 that supports the front wheel 1 is arranged on the rear side with respect to the front and rear support frames 56 and 57 in a side view. Separate right and left reinforcing frames 62 are connected to the bracket 61a of the reinforcing frame 61 and the front axle case 10.

The right and left protection frames 63 are connected to the front portion of the reinforcing frame 62 and are located on the front side with respect to the supply pumps 72a to 72c and 72d to 72f described later (configuration of the supply pump). It is extended like a cantilever.

(Outline of composition to supply liquid fertilizer to the rice field)
As shown in FIGS. 1 and 8, the right and left storage tanks 71 for storing liquid fertilizer (corresponding to agricultural materials) and the six supply pumps 72a, 72b, 72c, 72d for delivering fertilizer from the storage tank 71. , 72e, 72f, and six supply nozzles 73a, 73b, 73c, 73d, 73e, 73f for supplying fertilizer fed from the supply pumps 72a to 72f to the field surface.

The supply pumps 72a to 72f are driven along with the planting of seedlings by the seedling planting device 6 (planting arm 14). The fertilizer in the right and left storage tanks 71 is fed from the supply pumps 72a to 72f, supplied to the supply nozzles 73a to 73f, and supplied to the field surface from the supply nozzles 73a to 73f.

(Configuration of storage tank)
As shown in FIGS. 1 to 4, the support arm 68 is connected to the front and rear support frames 56 and 57 and extends outward. The storage tank 71 is supported by the support arm 68 and is arranged below the reserve seedling stand 60.

The storage tank 71 is made of synthetic resin and is translucently configured and vertically elongated. A lid portion 71a is provided so as to be openable and closable around the axial core P1 in the left-right direction at the upper part of the front portion of the storage tank 71. ing. By opening the lid 71a of the storage tank 71, fertilizer can be replenished from the opening of the lid 71a of the storage tank 71.

(Configuration of supply pump)
As shown in FIGS. 4 and 8, the front and rear support plates 69 having an inverted triangular shape in front view are connected to the support arm 68 and extend downward. On the lower side of the storage tank 71 on the left, three supply pumps 72a, 72b, 72c are arranged side by side in the front-rear direction in a posture facing the left-right direction, connected to each other, and attached to the front and rear support plates 69. It is supported.

Below the storage tank 71 on the right, three supply pumps 72d, 72e, 72f are arranged side by side in the front-rear direction in a posture facing the left-right direction, connected to each other, and attached to the front and rear support plates 69. It is supported.

The supply pumps 72a, 72b, 72c communicate with each other internally, and the supply path 70 extending from the lower part of the front part of the left storage tank 71 is connected to the frontmost supply pump 72c, and the left storage tank 71 is stored. Supply lines 74 and 75 extending from the lower part of the rear part of the tank 71 are connected to the supply pump 72a at the rearmost part. In this way, the three supply pumps 72a, 72b, 72c are connected to the lower part of the left storage tank 71.

The supply pumps 72d, 72e, and 72f communicate with each other internally, and the supply path 70 extending from the lower part of the front part of the right storage tank 71 is connected to the frontmost supply pump 31f to store the right storage. Supply lines 74 and 75 extending from the lower part of the rear part of the tank 71 are connected to the supply pump 72d at the rearmost part. In this way, the three supply pumps 72d, 72e, 72f are connected to the lower part of the storage tank 71 on the right.

The supply paths 70 and 75 are made of rubber hoses and are formed in an elbow shape. The supply path 74 is made of synthetic resin and has a T-shape, and a discharge path (not shown) extends from the supply path 74, and an on-off valve (not shown) is installed in the discharge path of the supply path 74. Has been done.

With the above configuration, the fertilizer in the storage tank 71 on the left is supplied to the supply pumps 72a, 72b, 72c through the supply channels 70, 74, 75. The fertilizer in the storage tank 71 on the right is supplied to the supply pumps 72d, 72e, 72f through the supply channels 70, 74, 75.
By opening the on-off valve of the discharge path of the supply path 74, the fertilizer of the storage tank 71 can be discharged from the supply path 74.

(Supply nozzle configuration)
As shown in FIGS. 1 and 8, the supply nozzles 73a to 73f are thin pipes and are composed of metal pipes, and the seedlings are arranged in the vicinity of the passage locus of the rotating case 13 and the planting arm 14. Attached to the planting device 6, the outlets of the supply nozzles 73a to 73f are arranged at relatively shallow positions in the field surface.

The supply hose 76 is connected to the supply pump 72a and the supply nozzle 73a, the supply hose 76 is connected to the supply pump 72b and the supply nozzle 73b, and the supply pump 72c and the supply nozzle 73c are connected. The supply hose 76 is connected.

The fertilizer in the storage tank 71 on the left is fed from the supply pumps 72a, 72b, 72c, is supplied to the supply nozzles 73a, 73b, 73c through the supply hose 76, and is supplied to the field surface from the supply nozzles 73a, 73b, 73c. Nozzle.

The supply hose 76 is connected to the supply pump 72d and the supply nozzle 73d, the supply hose 76 is connected to the supply pump 72e and the supply nozzle 73e, and the supply pump 72f and the supply nozzle 73f are connected. The supply hose 76 is connected.

The fertilizer in the storage tank 71 on the right is fed from the supply pumps 72d, 72e, 72f, is supplied to the supply nozzles 73d, 73e, 73f through the supply hose 76, and is supplied to the field surface from the supply nozzles 73d, 73e, 73f. Nozzle.

The supply pump 72a and the supply nozzle 73a correspond to the first planting strip L1, the supply pump 72b and the supply nozzle 73b correspond to the second planting strip L2, and the supply pump 72c and the supply nozzle 73c correspond to the second planting strip L2. Corresponds to the planting strip L3 of 3.

The supply pump 72d and the supply nozzle 73d correspond to the fourth planting strip L4, the supply pump 72e and the supply nozzle 73e correspond to the fifth planting strip L5, and the supply pump 72f and the supply nozzle 73f correspond to the fifth planting strip L5. Corresponds to the planting strip L6 of 6.

(Transmission system to the output shaft of the mission case when driving the supply pump)
As shown in FIGS. 11, 12, and 13, a transmission gear 77 is attached to the transmission shaft 22 so as to be relatively rotatable inside the transmission case 8. A one-way clutch 78 is provided between the transmission shaft 22 and the transmission gear 77, and the forward (forward rotation) power of the continuously variable transmission 18 is transmitted to the transmission gear 77 via the one-way clutch 78.

As shown in FIG. 13, a cylindrical transmission shaft 79 is attached to the transmission shaft 25 so as to be relatively rotatable. The transmission gears 80 and 81 are connected to the transmission shaft 79, and the transmission gear 80 and the transmission gear 77 are in mesh with each other. The transmission shaft 82 is supported in parallel with the transmission shaft 25, and the transmission gear 83 and the transmission gear 81 connected to the transmission shaft 82 are in mesh with each other.

The output shaft 84 is supported concentrically with the transmission shaft 82, and a fertilizer application clutch 85 is provided between the transmission shaft 82 and the output shaft 84. As shown in FIGS. 2, 5, 8 and 13, the cylindrical shaft support portion 86 is connected to the right portion of the mission case 8 which is on the same side as the continuously variable transmission 34 in the mission case 8 and is connected to the right portion (outside). ) Has been postponed. The output shaft 84 is supported along the inside of the shaft support portion 86 and protrudes from the end portion of the shaft support portion 86.

As shown in FIG. 13, the fertilizer application clutch 85 is provided inside the base portion (connecting portion with the mission case 8) of the shaft support portion 86. In the fertilizer application clutch 85, the occlusal portion 87 attached to the output shaft 84 so as to be rotatable and slidable integrally with the output shaft 84 by the spline structure and the occlusal portion 87 are urged to the occlusal side with the end of the transmission shaft 82. A spring 88 is provided.

When the occlusal portion 87 meshes with the end of the transmission shaft 82 in the fertilizer application clutch 85, the power of the transmission shaft 82 is transmitted to the output shaft 84 via the fertilizer application clutch 85. When the occlusal portion 87 is operated away from the end of the transmission shaft 82 against the spring 88, the power of the transmission shaft 82 is cut off by the fertilizer clutch 85.

(Transmission system from the output shaft of the mission case to the supply transmission in driving the supply pump)
As shown in FIGS. 2, 6 and 7, the support member 89 formed by bending the plate material is connected to the right portion of the rear portion of the support frame 9 and extends to the right side. The left portion of the supply transmission 91 is connected to the support member 89, and the rod-shaped support member 90 is connected to the left portion of the supply transmission 91 and the transmission case 8, and the supply transmission 91 is on the floor. It is located below the right part of 49.

As shown in FIGS. 6, 7 and 8, the input shaft 93 extends to the left from the supply transmission 91, and the sprocket 93a is connected to the end of the input shaft 93.
As shown in FIGS. 5, 8 and 13, the sprocket 84a is connected to the end of the output shaft 84 protruding from the shaft support portion 86. A plate-shaped support member 95 is connected to the end of the shaft support portion 86, and the tension ring 96 is rotatably supported by the support member 95.

As shown in FIGS. 5, 6, 8 and 13, a transmission chain 94 is attached over the sprocket 84a of the output shaft 84, the sprocket 93a of the input shaft 93 and the tension ring 96, and the transmission chain 94 is attached by the tension ring 96. Tension is maintained.

With the above configuration, as shown in FIGS. 8 and 13, the forward (forward rotation) power of the stepless transmission 18 is the one-way clutch 78, the transmission gear 77, the transmission shaft 79, the transmission gears 80, 81, and the transmission gear 83. The power of the output shaft 84 is transmitted to the output shaft 84 via the transmission shaft 82 and the fertilizer application clutch 85, and the power of the output shaft 84 is transmitted to the input shaft 93 of the supply transmission 91 via the transmission chain 94.

(Transmission system from the supply transmission to the supply pump in driving the supply pump)
As shown in FIGS. 2, 6, 7, and 8, the transmission shaft 97 extends to the left side from the supply transmission 91 and extends in the vicinity of the supply pump 72a. The transmission shaft 98 extends to the right from the supply transmission 91 and extends in the vicinity of the supply pump 72d.

As shown in FIG. 8, supply clutches 92a, 92b, 92c, 92d, 92e, 92f are provided in the supply pumps 72a to 72f, and two sprockets 99 are provided via the supply clutches 92a to 92f. It is connected to ~ 72f. The supply clutches 92a to 92f are urged to a transmission state by an internal spring (not shown).

A transmission chain 100 is attached to the sprocket 97a connected to the end of the transmission shaft 97 and the sprocket 99 of the supply pump 72a. The transmission chain 100 is attached to the sprocket 99 of the supply pump 72a and the sprocket 99 of the supply pump 72b, and the transmission chain 100 is attached to the sprocket 99 of the supply pump 72b and the sprocket 99 of the supply pump 72c. Has been done.

A transmission chain 100 is attached to the sprocket 98a connected to the end of the transmission shaft 98 and the sprocket 99 of the supply pump 72d. The transmission chain 100 is attached to the sprocket 99 of the supply pump 72d and the sprocket 99 of the supply pump 72e, and the transmission chain 100 is attached to the sprocket 99 of the supply pump 72e and the sprocket 99 of the supply pump 72f. Has been done.

With the above configuration, the power transmitted to the input shaft 93 of the supply transmission 91 is changed by the supply transmission 91, and the changed power is transmitted to the supply pumps 72a and 72b via the transmission shaft 97 and the transmission chain 100. , 72c, and is transmitted to the supply pumps 72d, 72e, 72f via the transmission shaft 98 and the transmission chain 100, and the supply pumps 72a to 72f are rotationally driven in the same direction. The power transmitted to the input shaft 93 of the supply transmission 91 is changed in a plurality of stages by the supply transmission 91, so that the feeding amount of the supply pumps 72a to 72f is changed.

(Structure of shift lever support in shifting operation of supply transmission)
As shown in FIGS. 5, 6 and 7, two support portions 91a and 91b are projected on the right side of the supply transmission gear 91, and the transmission shafts 101 and 102 are the support portions 91a and 91b of the supply transmission transmission device 91. It comes out on the right side from the vicinity of.

Two speed change members 103 and 104 having a triangular shape in a plan view and a connecting member 105 in which the plate material is bent into a channel shape are provided. The fulcrum shafts 103a and 104a of the speed change members 103 and 104 are inserted into the openings of the connecting members 105 and inserted into the openings of the support portions 91a and 91b of the supply speed changer 91, and the fulcrum shafts of the speed change members 103 and 104 are inserted. Retaining pins (not shown) are attached to 103a and 104a.

The speed change members 103 and 104 are supported by the support portions 91a and 91b of the supply speed change device 91 so as to be swingable around the vertical axis P2 and P3 of the fulcrum shafts 103a and 104a of the speed change members 103 and 104. The speed change members 103 and 104 and the speed change shafts 101 and 102 are connected. The connecting member 105 is fixed to the support portions 91a and 91b of the supply transmission 91 by the fulcrum shafts 103a and 104a of the transmission members 103 and 104.

A shift lever support portion 106 is provided. The lever guide 106a formed by bending the plate material on the speed change lever support portion 106, the support portion 106b formed by bending the plate material in a channel shape and connected to the lever guide 106a, and the round pipe shape connected to the lever guide 106a. A connecting portion 106c is provided.

The lever guide 106a of the shift lever support portion 106 is connected to the bracket 66a of the support frame 66, and the connecting portion 106c of the shift lever support portion 106 is connected to the connecting member 105. As shown in FIGS. 2, 3 and 5, the shift lever support portion 106 is arranged near the lower side of the right lateral portion 49a (right entry portion 53) in the front portion of the floor 49.

As shown in the above (transmission system from the output shaft of the transmission case to the supply transmission in the drive structure of the supply pump) and FIG. 6, the left portion of the supply transmission 91 is formed by the support members 89 and 90 to form the transmission case 8 and In addition to being supported by the support frame 9, the right portion of the supply transmission 91 is supported by the support frame 66 via the shift lever support portion 106.

(Structure of shift lever in shift operation of supply transmission)
As shown in Figs. The lever support portion 106 is supported so as to be swingable around the shaft cores P4 and P5 in the vertical direction of the support portion 106ba. The shifting levers 107 and 108 extend outward (on the right side) so as to overlap the lever guide 106a of the shifting lever support portion 106 in a plan view.

Arms 107a and 108a are connected to the speed change levers 107 and 108. The linking rod 109 (corresponding to the linking mechanism) is connected to the arm 107a of the speed change lever 107 and the speed change member 103, and the linking rod 109 (to the linking mechanism) extends over the arm 108a of the speed change lever 108 and the speed change member 104. Equivalent) is connected. As shown in FIGS. 2, 3 and 6, the linking rod 109 is arranged below the floor 49 and intersects the connecting portion 106c of the speed change lever support portion 106 above.

With the above configuration, when the operator swings the gear shifting levers 107 and 108, the gear shifting shafts 101 and 102 are slidably operated via the linking rod 109 and the gear shifting members 103 and 104 to supply the transmission gearbox. The speed change operation of 91 is performed.

In the supply transmission 91, the speed change lever 107 can shift 3 speeds, and the speed change lever 108 can change 4 speeds. Therefore, the speed change levers 107 and 108 can change 12 speeds.

When the shift lever 107 is operated to the neutral position, the power from the supply transmission 91 to the supply pumps 72a to 72f is stopped. This state is suitable for planting seedlings by the seedling planting device 6 while stopping the supply of fertilizer to the field surface.

(Positional relationship between floor, shift lever, storage tank, front and rear support frames)
As shown in FIG. 2, the shifting levers 107 and 108 (lever guide 106a of the shifting lever support portion 106) are viewed in a plan view with respect to the right lateral portion 49a (right entry portion 53) in the front portion of the floor 49. , Located on the outside (right side).

The right front and rear support frames 56, 57 are outside (right side) with respect to the right side (shift lever 107, 108 side) side portion 49a (right entry portion 53) in the front part of the floor 49 in a plan view. ) Is placed.
The left front and rear support frames 56 and 57 are arranged on the outside (left side) with respect to the left lateral portion 49a (left entry portion 53) in the front portion of the floor 49 in a plan view.

The right storage tank 71 is arranged on the outside (right side) with respect to the right side (shift lever 107, 108 side) side portion 49a (right entry portion 53) in the front portion of the floor 49 in a plan view. ..
The left storage tank 71 is arranged on the outside (left side) with respect to the left horizontal portion 49a (left entry portion 53) in the front portion of the floor 49 in a plan view.

As shown in FIGS. 2 and 3, the speed change levers 107 and 108 (lever guide 106a of the speed change lever support portion 106) have a front right support frame 56 and a right rear support frame 57 in a plan view. It is placed in between.

As shown in FIG. 2, the shifting levers 107 and 108 (lever guide 106a of the shifting lever support portion 106) and the right front and rear support frames 56 and 57 are on the right side of the front portion of the floor 49 in a plan view. It is arranged between the lateral portion 49a (right entry portion 53) of (shift lever 107, 108 side) and the right storage tank 71.
The left front and rear support frames 56 and 57 are arranged in a plan view between the left lateral portion 49a (left entry portion 53) and the left storage tank 71 at the front portion of the floor 49. ..

The shift levers 107 and 108 (lever guide 106a of the shift lever support portion 106) and the right front and rear support frames 56 and 57 are on the right side of the floor 49 on the rear side (shift lever 107 and 108 side) in a plan view. It is arranged on the left and right center side (left side) of the aircraft with respect to the virtual line K1 extending in the front-rear direction from the lateral portion 49b of the aircraft.

The left-right center side (left side) portion 71b of the right storage tank 71 is arranged on the left-right center side (left side) of the machine body with respect to the virtual line K1 in a plan view. The right storage tank 71 is arranged in front of the right step 54 in a plan view, and the outer (right side) portion 71c of the right storage tank 71 is outside the right step 54 in a plan view. It is arranged on the left and right center side (left side) of the aircraft with respect to the virtual line K3 extending in the front-rear direction from the horizontal portion of the aircraft.

The left front and rear support frames 56 and 57 are arranged on the left and right center side (right side) of the aircraft from the virtual line K2 extending in the front-rear direction from the left horizontal portion 49b at the rear of the floor 49 in a plan view. Has been done.

The left-right center side (right side) portion 71b of the left storage tank 71 is arranged on the left-right center side (right side) of the machine body with respect to the virtual line K2 in a plan view. The left storage tank 71 is arranged in front of the left step 54 in a plan view, and the outer (left side) portion 71c of the left storage tank 71 is outside the left step 54 in a plan view. It is arranged on the left and right center side (right side) of the aircraft with respect to the virtual line K4 extending in the front-rear direction from the horizontal portion of the aircraft.

(Elevation operation of seedling planting device, operation of planting clutch and fertilizer application clutch)
As shown in FIG. 14, the operating lever 110 is provided on the lower right side of the steering handle 52 and extends to the right side. The operating lever 110 can be operated from the neutral position N to the upper rising position U1 and the lower lowering position D1 and is urged to the neutral position N. The operation position of the operation lever 110 is input to the control device 111 provided on the machine body 3.

An electric motor 112 capable of operating the planting clutch 48 (see FIG. 12) and the fertilizer application clutch 85 (see FIG. 13) in a transmission state and a cutoff state, and an electromagnetically operated type control valve 113 for supplying and discharging hydraulic oil to the hydraulic cylinder 5. Is provided. The control device 111 operates the electric motor 112 and the control valve 113 as described below.

When the operating lever 110 is operated to the ascending position U1, the planting clutch 48 and the fertilizer application clutch 85 are operated in the shutoff state by the electric motor 112, the automatic elevating control described later is stopped, and the seedling planting device is operated by the control valve 113. 6 is operated to rise to the upper limit position.

When the operating lever 110 is operated to the lowering position D1, the seedling planting device 6 is lowered by the control valve 113 while the planting clutch 48 and the fertilizer application clutch 85 are maintained in the shut-off state, and the float 15 touches the ground surface. Then, the automatic ascending / descending control is activated, and the seedling planting device 6 touches the surface of the field and stops.

When the operating lever 110 is operated to the lowering position D1 again, the planting clutch 48 and the fertilizer application clutch 85 are operated in the transmission state by the electric motor 112 in the state where the automatic raising / lowering control is activated.

The automatic elevating control is performed as described below.
The rear part of the central float 15 is supported by the seedling planting device 6 so as to swing up and down, and a potentiometer (not shown) for detecting the height of the seedling planting device 6 with respect to the central float 15 is provided. The detection value of the potentiometer is input to the control device 111.

As the machine 3 progresses, the central float 15 follows the ground surface, and the height of the seedling planting device 6 with respect to the central float 15 is detected by the detection value of the potentiometer, and the seedling planting device is detected from the rice field surface. Heights up to 6 are detected.

As a result, the seedling planting device 6 is maintained at the set height from the rice field surface based on the height of the seedling planting device 6 with respect to the central float 15 (height from the rice field surface to the seedling planting device 6). The hydraulic cylinder 5 is operated by the control valve 113 (so that the detection value of the potentiometer is maintained at the set value), and the seedling planting device 6 is automatically raised and lowered.

(Structure of mechanical linkage between electric motor and fertilizer clutch)
As shown in FIGS. 3 and 5, the continuously variable transmission 34 is connected to the upper part of the right part of the mission case 8, and the shaft support part 86 is connected to the right part of the mission case 8. The continuously variable transmission 34 is arranged above the shaft support portion 86 in a side view, and the shaft support portion 86 is arranged below the continuously variable transmission 34 in a side view.

With the continuously variable transmission 34 and the shaft support 86 in the mission case 8, the right front axle case 10 is located on the rear side of the shaft support 86 and below the continuously variable transmission 34 in a side view. It is connected to the right part on the same side.

As shown in FIGS. 3 and 13, since the continuously variable transmission 34 and the shaft support portion 86 are close to each other, the recess 86a that avoids interference with the continuously variable transmission 34 is provided in the shaft support portion 86. A portion facing the transmission 34 is provided along the left-right direction of the shaft support portion 86.

Since the clutch operating portion 135 and the fertilizer application clutch 85, which will be described later, are provided at the base of the shaft support portion 86 (the connecting portion with the mission case 8), the base portion of the shaft support portion 86 (clutch operating portion 135 and the fertilizer application clutch 85) The recess 86a is not provided in the portion where the recess 86a is provided.

As shown in FIGS. 3 and 5, the filter 134 for lubricating oil inside the mission case 8 is located on the front side of the right front axle case 10 and on the lower side of the continuously variable transmission 34 in a side view. As described above, it is connected to the right portion on the same side as the continuously variable transmission 34 and the shaft support portion 86 in the transmission case 8.

As shown in FIGS. 5 and 13, the clutch operating portion 135 is rotatably supported around the shaft core P6 in the vertical direction by the base portion (connecting portion with the transmission case 8) of the shaft support portion 86. When the clutch operating portion 135 is rotationally operated, the fertilizer application clutch 85 is in a transmission state in which the occlusal portion 87 is occluded with the end of the transmission shaft 82 by the spring 88, and the occlusal portion 87 opposes the spring 88. It is operated in a cutoff state in which it is operated away from the end of 82.

The clutch operating portion 135 is provided at the lower portion of the shaft support portion 86 opposite to the portion facing the continuously variable transmission 34, and is provided so as to project downward. The clutch operating unit 135 is arranged between the right front axle case 10 and the filter 134 in a side view. The arm 135a is connected to the lower part of the clutch operating portion 135, and the arm 135a extends to the right side (outside) along the lower side of the shaft support portion 86.

The linking rod 136 connected to the electric motor 112 shown in FIG. 14 (operation of raising and lowering the seedling planting device, operation of the planting clutch and the fertilizer application clutch) is a side view of the continuously variable transmission 34 and the right front axle. It is arranged between the case 10 and the case 10 in the front-rear direction and is connected to the arm 135a of the clutch operation unit 135.

(Arrangement of supply pump operating mechanism)
As shown in FIGS. 9 and 10, in the left front and rear support frames 56 and 57, the support plate 114 extends over the portion between the left storage tank 71 and the reserve seedling stand 60 in a side view. Are concatenated.

A supply pump operating mechanism 115 capable of stopping and operating a part of the selected supply pumps 72a to 72f among the plurality of supply pumps 72a to 72f is connected to the support plate 114, and the right and left support frames 56, It is supported by the left front and rear support frames 56 and 57, which are opposite to the speed change levers 107 and 108 of 57.

The supply pump operating mechanism 115 is connected to the rear portion of the left portion of the support plate 114, and overlaps the rear portion of the storage tank 71 on the left in a plan view. Even if the lid 71a of the left storage tank 71 is opened upward, the lid 71a of the left storage tank 71 and the supply pump operating mechanism 115 do not interfere with each other, and the left storage tank 71 is opened. The lid portion 71a and the supply pump operating mechanism 115 are in an overlapping state when viewed from the front.

(Configuration of supply pump operating mechanism)
As shown in FIGS. 9, 10 and 14, the front support plate 116 and the rear support plate 117 formed by bending the plate material are connected to the support plate 114, and the drive shaft 118 rotates on the support plate 116. It is supported as much as possible. The drive shaft 118 is inserted and connected to one end of the tubular drive shaft 119, and the other end of the drive shaft 119 is rotatably supported by the support plate 117.

Four cams 120a, 120b, 120c, 120d are integrally rotatably attached to the drive shaft 119. The fulcrum shaft 123 is supported over the support plates 116 and 117. The four operating arms 121a, 121b, 121c, 121d are swingably supported by the fulcrum shaft 123, and the rollers 124 attached to the operating arms 121a to 121d are mounted on the cams 120a to 120d.

Four wires 122a, 122b, 122c, and 122d are provided, and the outer wires 122a to 122d are supported by the support plate 125 connected over the support plates 116 and 117. The inner wires 122a to 122d are connected to the operating arms 121a to 121d.

The wires 122a and 122b extend downward along the rear support frame 57 on the left, and the inner of the wires 122a is connected to the supply clutches 92a and 92b (supply pumps 72a and 72b) so that the wires 122b The inner is connected to the supply clutch 92c (supply pump 72c).

The wires 122c, 122d extend downward along the rear support frame 57 on the left and along the reinforcing frame 61 (see FIGS. 2, 3 and 4), the supply pump 72d on the shifting lever 107, 108 side. , 72e, 72f are extended. The wires 122c and 122d are connected to the reinforcing frame 61 by a mounting band (not shown), and are arranged through the lower part of the support frame 9 (airframe 3).

The inner of the wire 122c is connected to the supply clutch 92d (supply pump 72d), and the inner of the wire 122d is connected to the supply clutches 92e, 92f (supply pump 72e, 72f).

The electric motor 126 and the reduction mechanism 127 are connected to the support plate 116, and the pinion gear 127a of the reduction mechanism 127 meshes with the drive gear 118a connected to the drive shaft 118.

The detection shaft 128 is inserted and connected to the other end of the drive shaft 119, and the position sensor 129 that detects the positions (angles) of the cams 120a to 120d via the detection shaft 128 and the drive shafts 118 and 119 The detected value of the position sensor 129 is input to the control device 111.

The electric motor 126 rotationally drives the pinion gear 127a of the reduction mechanism 127, and the drive shafts 118 and 119 and the cams 120a to 120d are integrally rotationally driven. The operating arms 121a to 121d are operated by the cams 120a to 120d, the inner of the wires 122a to 122d is pulled toward the operating arms 121a to 121d, the supply clutches 92a to 92f are operated in a cutoff state, and the supply pump 72a is operated. ~ 72f is stopped.

(Composition of planted arm clutch and vertical feed clutch)
As shown in FIG. 14, each of the three planting transmission cases 12 is provided with planting arm clutches 131a, 131b, 131c.

By operating the planting arm clutch 131a provided on the left planting transmission case 12 in the transmission state and the cutoff state, the rotating case 13 and the planting arm of the first and second planting strips L1 and L2 are operated. 14 is rotated and stopped.

The planting arm clutch 131b provided in the central planting transmission case 12 is operated in the transmission state and the cutoff state, so that the rotation case 13 and the planting arm of the third and fourth planting strips L3 and L4 are operated. 14 is rotated and stopped.

The planting arm clutch 131c provided on the right planting transmission case 12 is operated in the transmission state and the cutoff state, so that the rotating case 13 and the planting arm of the fifth and sixth planting strips L5 and L6 are operated. 14 is rotated and stopped.

Six seedling rests (not shown) are provided on the seedling stand 16, and a vertical feeding mechanism (not shown) for seedlings is provided on each of the seedling rests.
A vertical feed clutch 132a capable of transmitting and blocking power is provided in the vertical feed mechanism corresponding to the first and second planting strips L1 and L2. A vertical feed clutch 132b capable of transmitting and blocking power is provided in the vertical feed mechanism corresponding to the third and fourth planting strips L3 and L4. A vertical feed clutch 132c capable of transmitting and blocking power is provided in the vertical feed mechanism corresponding to the fifth and sixth planting strips L5 and L6.

An electric motor 130 is provided, and an operation mechanism (not shown) similar to the supply pump operation mechanism 115 is provided with the planted arm clutches 131a, 131b, 131c, the vertical feed clutches 132a, 132b, 132c, and the electric motor 130. It is provided over.

(Operation to shut off the supply clutch, planted arm clutch and vertical feed clutch)
As shown in FIG. 14, three push-on / push-off type clutch switches 133a, 133b, and 133c are arranged side by side in the left-right direction on the lower side of the rear side of the control handle 52, and the clutch switches 133a. , 133b, 133c are input to the control device 111.

When the clutch switches 133a, 133b, and 133c are pushed, the control device 111 operates the electric motors 126 and 130 to perform the operations as described below.

It is assumed that the supply clutches 92a to 92f, the planting arm clutches 131a, 131b, 131c and the vertical feed clutchs 132a, 132b, 132c are in a state of being operated in the transmission state.

As shown in FIGS. 9, 10 and 14, when the clutch switch 133a is pushed, the drive shafts 118, 119 and the cams 120a to 120d are rotationally driven in the positive direction by a predetermined angle in the supply pump operation mechanism 115. ..

The operation arm 121a is operated by the cam 120a, the wire 122a is pulled toward the operation arm 121a, and the supply clutches 92a and 92b are operated in the cutoff state to correspond to the first and second planting strips L1 and L2. The supply pumps 72a and 72b are stopped.

Similarly, the planting arm clutch 131a and the vertical feed clutch 132a are operated in the cutoff state, and the planting arm 14 and the vertical feed mechanism corresponding to the first and second planting strips L1 and L2 are stopped.

Next, when the clutch switch 133b is pushed, the drive shafts 118 and 119 and the cams 120a to 120d are further rotationally driven in the positive direction by a predetermined angle in the supply pump operation mechanism 115.

While the supply clutches 92a and 92b are maintained in the disconnected state, the operation arms 121b and 121c are operated by the cams 120b and 120ca, the wires 122b and 122c are pulled toward the operation arms 121b and 121c, and the supply clutches 92c and 92d are pulled. The supply pumps 72dc and 72d corresponding to the third and fourth planting wires L3 and L4 are stopped by being operated in the shut-off state.

Similarly, while the planting arm clutch 131a and the vertical feed clutch 132a are maintained in the cutoff state, the planting arm clutch 131b and the vertical feed clutch 132b are operated in the cutoff state, and the third and fourth planting strips L3 and L4 are operated. The planting arm 14 and the vertical feed mechanism corresponding to the above are stopped.

Next, when the clutch switch 133c is pushed, the drive shafts 118 and 119 and the cams 120a to 120d are further rotationally driven in the positive direction by a predetermined angle in the supply pump operation mechanism 115.

While the supply clutches 92a to 92d are maintained in the cutoff state, the operation arm 121d is operated by the cam 120d, the wire 122d is pulled toward the operation arm 121d, and the supply clutches 92e and 92f are operated in the cutoff state. The supply pumps 72e and 72f corresponding to the 5th and 6th planting lines L5 and L6 are stopped.

Similarly, while the planting arm clutches 131a, 131b and the vertical feed clutches 132a, 132b are maintained in the cutoff state, the planting arm clutch 131c and the vertical feed clutch 132c are operated in the cutoff state, and the fifth and sixth plantings are performed. The planting arm 14 and the vertical feed mechanism corresponding to the rows L5 and L6 are stopped.

(Operation of supply clutch, planted arm clutch and vertical feed clutch to transmission state)
As described above (operation of the supply clutch, the planted arm clutch and the vertical feed clutch to the disconnected state), the supply clutches 92a to 92f, the planted arm clutchs 131a, 131b, 131c and the vertical feed clutch 132a, 132b. , 132c are operated in the cutoff state.

In the above-mentioned state, when the clutch switch 133c is pushed, the drive shafts 118 and 119 and the cams 120a to 120d are rotationally driven in the opposite directions by a predetermined angle in the supply pump operation mechanism 115, and the supply clutches 92e and 92f are driven. Is operated in the transmission state, and the planting arm clutch 131c and the vertical feed clutch 132c are operated in the transmission state.

Next, when the clutch switch 133b is pushed, the drive shafts 118, 119 and the cams 120a to 120d are further rotationally driven in the opposite directions by a predetermined angle in the supply pump operation mechanism 115, and the supply clutches 92e and 92f are moved. The supply clutches 92c and 92d are operated in the transmission state while being maintained in the transmission state.

Similarly, while the planting arm clutch 131c and the vertical feed clutch 132c are maintained in the transmission state, the planting arm clutch 131b and the vertical feed clutch 132b are operated in the transmission state.

Next, when the clutch switch 133a is pushed, the drive shafts 118 and 119 and the cams 120a to 120d are further rotationally driven in the opposite directions by a predetermined angle in the supply pump operation mechanism 115, and the supply clutches 92c to 92f are driven. The supply clutches 92a and 92b are operated in the transmission state while being maintained in the transmission state.

Similarly, while the planting arm clutches 131b and 131c and the vertical feed clutches 132b and 132c are maintained in the transmission state, the planting arm clutch 131a and the vertical feed clutch 132a are operated in the transmission state.

(Operation of the supply clutch, planting arm clutch and vertical feed clutch in the reverse direction to the cutoff state and transmission state)
While the supply clutches 92a to 92f, the planting arm clutches 131a, 131b, 131c and the vertical feed clutches 132a, 132b, 132c are operated in the transmission state, the clutch switches 133c, 133b, 133a are pushed in this order. Then, first, the supply clutches 92e and 92f, the planting arm clutch 131c, and the vertical feed clutch 132c are operated in the disconnected state.

Next, the supply clutches 92c and 92d, the planting arm clutch 131b and the vertical feed clutch 132b are operated in the disconnected state. Next, the supply clutches 92a and 92b, the planting arm clutch 131a and the vertical feed clutch 132b are operated in the disconnected state.

As described above, in the state where the supply clutches 92a to 92f, the planting arm clutches 131a, 131b, 131c and the vertical feed clutches 132a, 132b, 132c are operated in the disengaged state, the clutch switches 133a, 133b, 133c are operated. When the push operation is performed in this order, the supply clutches 92a and 92b, the planting arm clutch 131a and the vertical feed clutch 132a are first operated in the transmission state.

Next, the supply clutches 92c and 92d, the planting arm clutch 131b and the vertical feed clutch 132b are operated in the transmission state. Next, the supply clutches 92e and 92f, the planting arm clutch 131c and the vertical feed clutch 132c are operated in the transmission state.

(First alternative form of carrying out the invention)
In the mission case 8 shown in FIGS. 11, 12, and 13, if the speed change range of the continuously variable transmission 34 is set to correspond only to the range between normal stocks and not between stocks in a sparsely planted state, transmission is performed. The configuration with respect to the axes 35, 36, 37 may be configured as described below.

As shown in FIG. 15, in the transmission shaft 36, the inter-stock gear 40 is left and the inter-stock gear 41 is abolished. In the transmission shaft 37, the inter-stock gears 42 and 43 are abolished, and a transmission gear 137 having the same outer diameter and number of teeth as the inter-stock gear 42 is connected to the transmission shaft 37, and the inter-stock gear 40 and the transmission gear 137 are engaged. doing.

(Second alternative form of carrying out the invention)
The supply transmission 91 may be configured to be located below the left portion of the floor 49.

According to the above configuration, the continuously variable transmission 18 is connected to the right part of the mission case 8, and the continuously variable transmission 34, the shaft support portion 86, and the filter 134 are connected to the left part of the mission case 8.

The shifting levers 107 and 108 (lever guide 106a of the shifting lever support portion 106) are arranged on the outside (left side) with respect to the left horizontal portion 49a (left entry portion 53) in the front portion of the floor 49 in a plan view. It is placed between the left front support frame 56 and the left rear support frame 57.

The shifting levers 107 and 108 (lever guide 106a of the shifting lever support portion 106) are arranged in plan view with the left side (shifting lever 107, 108 side) side portion 49a (left entry portion 53) in the front portion of the floor 49. It is arranged between the storage tank 71 on the left.
The supply pump operating mechanism 115 is supported by the right front and rear support frames 56, 57 on the opposite side of the shift levers 107, 108 of the right and left support frames 56, 57.

(Third alternative form of carrying out the invention)
The entry portion 53 is not formed in all of the right and left lateral portions 49a in the front portion of the floor 49, but the entry portion 53 is formed in a part of the right and left lateral portions 49a in the front portion of the floor 49. It may be configured to be formed.
The entry portion 53 may not be formed in the right and left lateral portions 49a in the front portion of the floor 49.

(Fourth alternative form of carrying out the invention)
An output pulley (not shown) is provided in place of the sprocket 84a of the output shaft 84, an input pulley (not shown) is provided in place of the sprocket 93a of the input shaft 93, and a transmission is provided in place of the transmission chain 94. A belt (not shown) may be provided.

The present invention includes not only a passenger-type rice transplanter that supplies liquid fertilizer to the rice transplanter, but also a passenger-type direct sowing machine that supplies liquid fertilizer to the rice transplanter while supplying seeds to the rice transplanter, and a passenger that supplies liquid chemicals to the rice transplanter. It can also be applied to type rice transplanters and passenger type direct seeding machines.

1 Front wheel 3 Aircraft 10 Front axle case 49 Floor 49a Horizontal part 49b Horizontal part 53 Entering part 56 Support frame 57 Support frame 60 Spare seedling stand 61 Reinforcement frame 62 Reinforcement frame 71 Storage tank 71b Part 72a Supply pump 72b Supply pump 72c Supply pump 72d Supply pump 72e Supply pump 72f Supply pump 73a Supply nozzle 73b Supply nozzle 73c Supply nozzle 73d Supply nozzle 73e Supply nozzle 73f Supply nozzle 91 Supply transmission 107 Shift lever (speed change controller)
108 Shift lever (shift control tool)
109 Linking rod (linking mechanism)
122c wire 122d wire 115 Supply pump operation mechanism K1 virtual line

Claims (10)

The floor supported by the aircraft and on which workers can board,
A storage tank for storing liquid agricultural materials, a supply pump for feeding the agricultural materials in the storage tank, and a supply nozzle for supplying the agricultural materials delivered from the supply pump to the field surface.
A supply transmission that is arranged below the floor and can change the amount of feed of the supply pump by shifting the power transmitted to the supply pump is provided.
An artificially operable speed changer is arranged outside the right or left side of the floor in plan view.
A linking mechanism connected to the transmission gear and the supply transmission is arranged below the floor.
A paddy field working machine in which the supply transmission is operated via the linkage mechanism by operating the transmission operating tool. The storage tank is arranged outside the lateral portion of the floor on the speed change operation tool side in a plan view.
The paddy field working machine according to claim 1, wherein the speed change operating tool is arranged between the horizontal portion of the floor and the storage tank in a plan view. The front and rear support frames for supporting the spare seedling stand are arranged outside the lateral portion of the floor on the speed change operation tool side in a plan view.
The paddy field working machine according to claim 1, wherein the speed change operating tool is arranged between the front support frame and the rear support frame in a plan view. The storage tank is arranged outside the lateral portion of the floor on the speed change operation tool side in a plan view.
Support frames before and after supporting the reserve seedling stand are arranged in a plan view between the side portion of the floor and the storage tank.
Claim 1 in which the speed change operating tool is arranged between the lateral portion of the floor and the storage tank in a plan view, and is arranged between the front support frame and the rear support frame. Paddy field work machine described in. An entry portion formed in the lateral portion of the front part of the floor on the side of the speed change operation tool so as to be located on the left and right center side of the machine body with respect to the lateral part of the rear part of the floor on the side of the speed change operation tool. Is provided,
The paddy field working machine according to claim 4, wherein the speed change operation tool and the support frame are arranged outside the entrance portion in a plan view. A claim in which the speed change operating tool and the support frame are arranged on the left and right center sides of the aircraft in a plan view with respect to a virtual line extending in the front-rear direction from a lateral portion on the speed change control tool side at the rear part of the floor. The paddy field working machine according to item 5. The paddy field working machine according to claim 6, wherein a portion of the storage tank on the left and right center side of the machine body is arranged on the left and right center side of the machine body with respect to the virtual line in a plan view. The storage tank is arranged outward with respect to both the right and left sides of the floor in plan view.
The support frame is arranged in a plan view between the right side of the floor and the right storage tank, and between the left side of the floor and the left storage tank.
A plurality of the supply pumps are connected to the lower part of the storage tank on the right and left.
A supply pump operating mechanism capable of stopping and operating a part of the selected supply pumps among the plurality of supply pumps is attached to the support frame on the opposite side of the speed change operation tool among the right and left support frames. The paddy field working machine according to any one of claims 4 to 7, which is supported. Reinforcing frames that reinforce the right and left support frames are connected to the right support frame and the left support frame through the lower part of the airframe.
A wire for stopping and operating a part of the supply pumps is provided by being connected to the supply pump operating mechanism and the supply pump on the transmission tool side of the right and left supply pumps. hand,
The paddy field working machine according to claim 8, wherein the wire is connected to the reinforcing frame and is arranged through the lower part of the machine body. The front axle case that supports the front wheels is arranged on the rear side with respect to the support frame in a side view.
The paddy field working machine according to claim 9, wherein another reinforcing frame is connected to the reinforcing frame and the front axle case.

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