JP7086036B2 - Paddy field work machine - Google Patents

Description

The present invention relates to a paddy field working machine such as a riding type rice transplanter and a riding type direct seeding machine.

In a passenger-type rice transplanter, which is an example of a paddy field working machine, as disclosed in Patent Document 1, a seedling planting device (corresponding to the first working device) for planting seedlings on the rice field surface and a liquid fertilizer are supplied to the rice field surface. Some are equipped with a fertilizer application device (corresponding to a second working device).

In Patent Document 1, a work transmission that can transmit power to the seedling planting device is provided inside a mission case provided in the machine body.
The shaft support is provided on the right side of the mission case and extends outward, and the output shaft is supported inside the shaft support. The power branched from immediately before the work transmission is transmitted to the output shaft via the fertilizer application clutch, and is transmitted from the output shaft to the fertilizer application device.

By operating the fertilizer application clutch in the transmission state and the cutoff state, the fertilizer application device is operated and stopped. A clutch operating portion capable of operating the fertilizer application clutch in the transmission state and the disengaged state is provided in the shaft support portion, and the clutch operating tool protrudes outward from the shaft support portion so that the clutch operating portion can be operated from the outside. ..

Japanese Unexamined Patent Publication No. 2008-173087

In the paddy field work machine, the work transmission is arranged inside the mission case in order to improve the maintainability of the work transmission and to equip it with a high-performance work transmission such as a continuously variable transmission. Instead, it is proposed to connect to the outside of the mission case.
In this case, the work transmission is connected to the right part (left part) of the mission case, and the shaft support portion is provided on the right part (left part) on the same side as the work transmission in the mission case and extends outward. May be configured to be issued.

In the present invention, in the paddy field work machine, the work transmission that transmits power to the first work device, and the output shaft and shaft support that transmit power to the second work device are the same right part (left part) in the mission case. ), The purpose is to configure the work transmission and the shaft support so as to be provided reasonably.

The paddy field working machine of the present invention has a first working device for supplying seedlings or seeds to the rice field surface, a second working device for supplying fertilizer or chemicals to the rice field surface, and a right or left part of a mission case provided on the machine body. A work transmission that is connected and can shift the power transmitted to the transmission shaft inside the mission case and transmit it to the first work unit, and a right side of the same side as the work transmission in the mission case. The power transmitted to the transmission shaft inside the transmission case, which is supported along the inside of the shaft support portion and the shaft support portion extending outward from the portion or the left portion, is transmitted to the second working device. A work clutch capable of transmitting and disengaging the power transmitted to the transmission shaft inside the transmission case to the output shaft is provided, and the work clutch can be operated in the transmission state and the disengagement state. The clutch operating portion is provided on the portion of the shaft support portion opposite to the portion facing the working transmission.

According to the present invention, in a paddy field work machine, a work transmission that can transmit power to the first transmission is connected to the right part (left part) of the mission case, and an output that can transmit power to the second transmission. When the shaft support portion provided inside the shaft is provided on the right portion (left portion) on the same side as the work transmission in the mission case, the clutch operating portion protruding from the shaft support portion is the shaft support portion. It is provided in the portion opposite to the portion facing the working transmission in the above.

As a result, even if the work transmission and the shaft support are arranged close to each other on the right side (left) of the mission case, the clutch operation unit and the work transmission are less likely to interfere with each other for work. Since the transmission and the shaft support are arranged so as to be reasonably close to each other, it is advantageous in terms of making the transmission case compact.

In the present invention, the working transmission is arranged above the shaft support portion in a side view, and the shaft support portion is arranged below the shaft support portion in a side view. It is preferable that the clutch operating portion is provided at the lower portion of the shaft support portion, which is a portion opposite to the portion facing the working transmission.

According to the present invention, since the work transmission is arranged at a relatively high position and is arranged away from the rice field surface on the upper side, mud and water scattered from the rice field surface are less likely to adhere to the work transmission. It will be advantageous in terms of.

In the above-mentioned state, according to the present invention, the shaft support portion is arranged below the work transmission in view of the side, and the clutch operation portion is on the opposite side of the shaft support portion facing the work transmission. Since it is provided in the lower part, which is the part of, it is impossible to reduce the interference between the clutch operation part and the work transmission, and to reduce the adhesion of mud and water scattered from the field surface to the work transmission. It is compatible without.

In the present invention, the work transmission and the work transmission in the mission case so that the front axle case that supports the front wheels is located on the rear side of the shaft support portion and below the work transmission on the side view. A linking member that is connected to the right or left portion on the same side as the shaft support portion and operates the clutch operating portion is arranged between the working transmission and the front axle case in a side view. It is preferable that it is connected to the clutch operation unit.

In paddy field work machines, the front axle case that supports the front wheels may be connected to the mission case.
According to the present invention, since the front axle case is arranged on the rear side of the shaft support portion and on the lower side of the work transmission gear in the side view, the work transmission gear is arranged at a relatively high position. This is advantageous in that mud and water scattered from the surface of the field are less likely to adhere to the work transmission.

In the above-mentioned state, according to the present invention, the linking member is arranged between the work transmission and the front axle case in a side view and is connected to the clutch operating section, and the clutch operating section is operated by the linking member. Then, the work clutch is operated in the transmission state and the disengagement state.
As a result, the space between the work transmission and the front axle case is effectively utilized, and the linking member is arranged, which is advantageous in terms of compactification of the structure in the vicinity of the mission case.

In the present invention, the filter in the mission case is located on the front side of the front axle case and on the lower side of the working transmission so that the filter for lubricating oil inside the mission case is located on the front side of the front axle case. It is preferable that the clutch operating portion is arranged between the front axle case and the filter in a side view, connected to the working transmission and the right or left portion on the same side as the shaft support portion. be.

In paddy field work machines, a filter for lubricating oil inside the mission case may be connected to the mission case.
According to the present invention, since the filter is arranged on the front side of the front axle case and on the lower side of the working transmission in a side view, the working transmission is arranged at a relatively high position. It is advantageous in that mud and water scattered from the surface of the field are less likely to adhere to the work transmission.

In the above-mentioned state, according to the present invention, the clutch operating unit is arranged between the front axle case and the filter in a side view, and the space between the front axle case and the filter is effectively used. It is advantageous in terms of compactness of the structure near the case.

In the present invention, it is preferable that the shaft support portion is provided with a recess for avoiding interference with the work speed changer.

According to the present invention, even if the work transmission and the shaft support are arranged close to each other, interference between the shaft support and the work transmission can be easily avoided by the recess of the shaft support, so that the work can be used. The transmission and the shaft support are arranged so as to be reasonably close to each other, which is advantageous in terms of making the transmission case compact.

In the present invention, the upper side rotating body connected to the end portion of the output shaft protruding from the end portion of the shaft support portion, the lower hand side rotating body capable of transmitting power to the second working device, and the shaft support. A tension ring supported by a support member connected to the end of the portion is provided, and an endless transmission body is attached over the upper side rotating body, the lower hand side rotating body, and the tension ring, and the output is described. It is preferable that the power of the shaft is transmitted to the lower rotating body via the upper rotating body and the endless transmission body.

An endless transmission body such as a transmission chain or a transmission belt is attached between the upper side rotating body of the output shaft and the lower side rotating body capable of transmitting power to the second working device, and the power of the output shaft is endless. When transmitted to the second working device via the transmission body and the lower side transmission body, a tension ring for maintaining the tension of the endless transmission body is often provided.

In the above-mentioned state, according to the present invention, since the support member is connected to the end of the shaft support portion and the tension ring is supported by the support member, the shaft support portion is also used to support the tension ring. , It is advantageous in terms of simplifying the support structure of the tension wheel.

It is a right side view of a passenger-type rice transplanter. It is a plan 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 near the shift lever and the supply shift device. It is an exploded perspective view near the shift lever and the supply shift device. It is a schematic diagram which shows the transmission system from a supply transmission to a supply pump, and the connection state between 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 a schematic diagram which shows the linkage state between a control device and each part, and the linkage state between a supply pump operation mechanism and a supply clutch. It is sectional drawing of the mission case in the 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 on the rear part of the machine body 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 a seedling planting device 6 (corresponding to the first working device) 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.

(Structure 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.

Three planting transmission cases 12 are arranged side by side in the left-right direction, and three floats 15 are arranged under 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, 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 diagonally 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 mission 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 to the forward side and the reverse side with the neutral position interposed therebetween.

As shown in FIG. 11, the hydraulic pump 20 is connected to the upper part of the right side of the mission 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.

The 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 meshed 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 shifted 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 rearwardly supported by the rear portion of the transmission 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 wheel 1 is braked via the front wheel differential mechanism 28 and the front wheel transmission shaft 27, and the rear wheel 2 is braked via the output shaft 31.

(Transmission system to seedling planting device)
As shown in FIGS. 8, 11 and 12, a hydrostatic type continuously variable transmission 34 (corresponding to a working transmission) for the seedling planting device 6 is connected to the upper part of the right part of the mission case 8. The input shaft 34a of the continuously variable transmission 34 and the transmission shaft 22 are connected to each other. The continuously variable transmission 34 can continuously change gears to the normal 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 (corresponding to the transmission shaft inside the mission case 8), and the output of the continuously variable transmission 34 is supported. The shaft 34b 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 interstitial gears 40 and 41 are connected to the transmission shaft 36, the four interstitial gears 42 and 43 are rotatably attached to the transmission shaft 37, the interstitial gears 40 and 42 are occluded, and the interstitial gear 41 is engaged. , 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. Will be.

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 axis direction (left-right direction in FIG. 12) of the transmission shaft 37.

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 mission 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.

When the continuously variable transmission 34 changes the stock spacing in the range of normal stock spacing, the key member 44 is engaged with the stock spacing gear 42. When the continuously variable transmission 34 sets the space between stocks in a sparsely planted state, the key member 44 is engaged with one of the three gears 43 between stocks.

As a result, the power of the transmission shaft 36 is transmitted to the output shaft 45 via the interstock gears 40, 42 or the interstock 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 control 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 part of the floor 49 is narrower than the width of the rear part of the floor 49 in a plan view.

The lateral portion 49a on the right of the front of the floor 49 is more than the right lateral portion 49b at the rear of the floor 49 (virtual line K1 extending in the front-rear direction from the right 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 (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 the left entrance portion 53 is formed on the 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 lateral 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 lateral 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 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 lateral portions 49b in the rear portion of the floor 49.

The right and left support frames 65 supporting 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 portions 49a in the front of the floor 49. It extends rearward along the line, 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) is connected. The frame 56 extends outward and extends upward through the position of the right (left) entry portion 53. The right support frame 56 is arranged on the lower side with respect to 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 to the right (left) entry portion 53. 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. A GPS antenna 59 for automatic steering is connected to the left and right center 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 stacked, 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 so as to be 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 and the six supply pumps 72a, 72b, 72c, 72d, 72e, 72f (No. 1) for delivering fertilizer from the storage tank 71. (Equivalent to two working devices) 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 out 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 pedestal 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 axis P1 in the left-right direction at the upper part of the front portion of the storage tank 71. ing. By opening the lid portion 71a of the storage tank 71, fertilizer can be replenished from the opening of the lid portion 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.

On the lower side of 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 is stored. The supply paths 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. The supply paths 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.

(Structure of supply nozzle)
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 passing 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 rotatably attached to a transmission shaft 22 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 (corresponding to a work clutch) 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 side (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, which is rotatably and slidably attached to 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 portion 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, 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 a sprocket 93a (corresponding to a lower rotating body) is connected to the end of the input shaft 93. ..
As shown in FIGS. 5, 8 and 13, a sprocket 84a (corresponding to a rotating body on the upper side) 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 (corresponding to an endless transmission body) is attached over the sprocket 84a of the output shaft 84, the sprocket 93a of the input shaft 93 and the tension ring 96. The tension of the transmission chain 94 is maintained by the tension ring 96.

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 and the transmission gears 80, 81, and the transmission gear 83. The power 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 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 over 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 over 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 transferred to the supply pumps 72a and 72b via the transmission shaft 97 and the transmission chain 100. , 72c, and 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 shift 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 speed change shafts 101 and 102 are the support portions 91a and 91b of the supply transmission transmission 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. A retaining pin (not shown) is 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, 104 and the speed change shafts 101, 102 are connected. The connecting member 105 is fixed to the support portions 91a and 91b of the supply speed change device 91 by the fulcrum shafts 103a and 104a of the speed change members 103 and 104.

A shift lever support portion 106 is provided. The lever guide 106a formed by bending the plate material to the speed change lever support portion 106, the support portion 106b formed by bending the plate material into a channel shape and connected to the lever guide 106a, and the support portion 106b connected to the lever guide 106a in the form of a round pipe. 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-mentioned (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 in 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. 5, 6 and 7, two speed change levers 107 and 108 formed by bending a round bar are provided, and the speed change levers 107 and 108 are the support portions of the speed change lever support portion 106. It is supported so as to be swingable around the shaft cores P4 and P5 in the vertical direction of 106ba. The shift levers 107 and 108 extend outward (on the right side) so as to overlap the lever guide 106a of the shift 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 is connected to the arm 107a of the speed change lever 107 and the speed change member 103, and the linking rod 109 is connected to the arm 108a of the speed change lever 108 and the speed change member 104. As shown in FIGS. 2, 3 and 6, the linking rod 109 is arranged on the lower side with respect to the floor 49 and is arranged so as to intersect the connecting portion 106c of the speed change lever support portion 106 on the upper side.

With the above configuration, when the operator swings with the shift levers 107 and 108, the shift shafts 101 and 102 are slid to operate via the linking rod 109 and the shift members 103 and 104, and the supply transmission shifter. The speed change operation of 91 is performed.

In the supply speed changer 91, the speed change lever 107 can change the speed in 3 steps, and the speed change lever 108 can change the speed in 4 steps. Therefore, the speed change levers 107 and 108 can change the speed in 12 steps.

When the shift lever 107 is operated to the neutral position, the power from the supply shift device 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.

(Position relationship between floor, shift lever, storage tank, front and rear support frames)
As shown in FIG. 2, the shift levers 107 and 108 (lever guide 106a of the shift 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. , Is 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, 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 storage tank 71 on the right is arranged on the outside (right side) with respect to the lateral portion 49a (right entry portion 53) on the right side (shift lever 107, 108 side) 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 lateral 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 shift levers 107 and 108 (lever guide 106a of the shift 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 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 in 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, 57 are arranged in a plan view between the left lateral portion 49a (left entry portion 53) in the front portion of the floor 49 and the left storage tank 71. ..

The shift lever 107, 108 (lever guide 106a of the shift lever support portion 106) and the right front and rear support frames 56, 57 are on the right (shift lever 107, 108 side) at the rear of the floor 49 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) 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 lateral 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) 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 lateral portion of the aircraft.

(Elevation operation of seedling planting device, operation of planting clutch and fertilizer application clutch)
As shown in FIG. 14, the operation lever 110 is provided on the lower right side of the control handle 52 and extends to the right side. The operating lever 110 can be operated from the neutral position N to the upper ascending position U1 and the lower descending 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 in 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 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 operation 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 disconnected state, and the float 15 touches the ground surface. Then, the automatic elevating control is activated, and the seedling planting device 6 comes into contact with the ground surface and is in a stopped state.

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 be swingable 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 (height from the rice field surface to the seedling planting device 6) with respect to the central float 15. 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 on the upper side with respect to the shaft support portion 86 in the side view, and the shaft support portion 86 is arranged on the lower side with respect to the continuously variable transmission unit 34 in the side view.

With the continuously variable transmission 34 and the shaft support 86 in the mission case 8 so that 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 the 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 in close proximity to each other, the recess 86a that avoids interference with the continuously variable transmission unit 34 is a stepless transmission 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 operation portion 135 and the fertilizer application clutch 85 described later are provided at the base portion of the shaft support portion 86 (the portion connected to the mission case 8), the base portion of the shaft support portion 86 (clutch operation portion 135 and the fertilizer application clutch 85) are provided. The recess 86a is not provided in the portion provided with the recess 86a.

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 rotated, 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, which is a portion 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. An 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 above-mentioned (operation of raising and lowering the seedling planting device, operation of the planting clutch and the fertilizer application clutch) and the linking rod 136 (corresponding to the linking member) connected to the electric motor 112 shown in FIG. It is arranged along the front-rear direction between the 34 and the right front axle case 10 and is connected to the arm 135a of the clutch operating portion 135.

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

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

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 portion 71a of the left storage tank 71 is opened upward, the lid portion 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.

(Structure of supply pump operation 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 to the support plate 116. It is supported as much as possible. The drive shaft 118 is inserted and connected to one end of the cylindrical drive shaft 119, and the other end of the drive shaft 119 is rotatably supported by the support plate 117.

The four cams 120a, 120b, 120c, and 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, 122d are provided, and the outer of the wires 122a to 122d is supported by the support plate 125 connected over the support plates 116, 117. The inner wires 122a to 122d are connected to the operation arms 121a to 121d.

Wires 122a, 122b extend downward along the left rear support frame 57, the inner of the wire 122a is connected to the supply clutches 92a, 92b (supply pumps 72a, 72b), and the wire 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 shift 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 Provided, the detection 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, 119 and the cams 120a to 120d are integrally rotationally driven. The operation arms 121a to 121d are operated by the cams 120a to 120d, the inner wires 122a to 122d are pulled toward the operation arms 121a to 121d, the supply clutches 92a to 92f are operated in a cutoff state, and the supply pumps 72a are operated. ~ 72f is stopped.

(Composition of planting 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 rotary 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.

By operating the planting arm clutch 131c provided on the right planting transmission case 12 in the transmission state and the cutoff state, the rotary 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 feed mechanism for seedlings (not shown) is provided on each of the seedling rests.
A vertical feed clutch 132a capable of transmitting and disconnecting 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 disconnecting 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 disconnecting 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 the cutoff state of the supply clutch, planting arm clutch and vertical feed clutch)
As shown in FIG. 14, three push-on / push-off type clutch switches 133a, 133b, 133c are arranged side by side in the left-right direction on the lower side of the rear side of the steering handle 52, and the clutch switches 133a. , 133b, 133c are input to the control device 111.

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

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, 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 operated. The supply pumps 72dc and 72d corresponding to the third and fourth planting strips L3 and L4 are stopped by being operated in the cutoff state.

Similarly, while the planting arm clutch 131a and the vertical feed clutch 132a are maintained in the disengaged state, the planting arm clutch 131b and the vertical feed clutch 132b are operated in the disengaged 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, 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 strips 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 strips L5 and L6 are stopped and operated.

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

In the above-mentioned state, when the clutch switch 133c is pushed, the drive shafts 118, 119 and the cams 120a to 120d are rotationally driven in the reverse direction 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 direction by a predetermined angle in the supply pump operation mechanism 115, and the supply clutches 92e and 92f are driven. 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, 119 and the cams 120a to 120d are further rotationally driven in the opposite direction 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, 131c and the vertical feed clutches 132b, 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 supply clutch, planting arm clutch and vertical feed clutch in reverse cutoff state and transmission state)
The clutch switches 133c, 133b, 133a are pushed in this order 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. Then, first, the supply clutches 92e and 92f, the planting arm clutch 131c and the vertical feed clutch 132c are operated in the cutoff 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 a 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 disconnected state, the clutch switches 133a, 133b, 133c are 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 Different Form of Implementation of 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 interstock gears 42 and 43 are abolished, a transmission gear 137 having the same outer diameter and number of teeth as the interstock gear 42 is connected to the transmission shaft 37, and the interstock gear 40 and the transmission gear 137 mesh with each other. is 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 portion 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 portion of the mission case 8.

The shift levers 107 and 108 (lever guide 106a of the shift lever support portion 106) 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. And placed between the left front support frame 56 and the left rear support frame 57.

The shift levers 107 and 108 (lever guide 106a of the shift lever support portion 106) are, in plan view, the left side portion (shift 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 lever 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 Different Embodiment of the Invention)
An output pulley (not shown) (corresponding to a rotating body on the upper side) is provided in place of the sprocket 84a of the output shaft 84, and an input pulley (not shown) (rotating on the lower side) is provided in place of the sprocket 93a of the input shaft 93. A transmission belt (not shown) (corresponding to an endless transmission body) may be provided instead of the transmission chain 94.

The present invention includes not only a riding-type rice transplanter that supplies liquid fertilizer to the rice field surface, but also a riding-type rice transplanter equipped with a fertilizer application device (corresponding to a second working device) that supplies powdered and granular fertilizer to the rice field surface, and seeds. Riding equipment equipped with a seeding device (corresponding to the first working device) (not shown) that supplies the rice field surface and a fertilizer applying device (corresponding to the second working device) (not shown) that supplies powdery or liquid fertilizer to the rice field surface. It can also be applied to type direct seeders. The present invention is used for a riding-type rice transplanter, a riding-type direct seeding machine, etc. equipped with a supply device (corresponding to a second working device) (not shown) for supplying powdery or liquid chemicals to the rice field surface instead of the fertilizer application device. Can also be applied.

1 Front wheel 3 Airframe 6 Seedling planting device (1st working device)
8 Mission case 10 Front axle case 22 Transmission shaft 34 Continuously variable transmission (working transmission)
72a Supply pump (second working device)
72b Supply pump (second working device)
72c supply pump (second working device)
72d supply pump (second working device)
72e Supply pump (second working device)
72f supply pump (second working device)
84 Output shaft 84a Sprocket (spinning body on the upper side)
85 Fertilization clutch (work clutch)
86 Shaft support 86a Recess 93a Sprocket (lower side rotating body)
94 Transmission chain (endless transmission body)
95 Support member 96 Tension wheel 134 Filter 135 Clutch operation unit 136 Coordination rod (coordination member)

Claims (6)

A first working device that supplies seedlings or seeds to the rice field, and a second working device that supplies fertilizer or chemicals to the rice field.
A work transmission that is connected to the right or left part of the mission case provided on the machine body and can shift the power transmitted to the transmission shaft inside the mission case and transmit it to the first work apparatus.
A shaft support portion extending outward from the right portion or the left portion on the same side as the work transmission in the mission case, and
An output shaft that is supported along the inside of the shaft support portion and can transmit the power transmitted to the transmission shaft inside the mission case to the second working device.
A work clutch capable of transmitting and disconnecting the power transmitted to the transmission shaft inside the mission case to the output shaft is provided.
A paddy field work machine in which a clutch operation unit capable of operating the work clutch in a transmission state and a disengagement state is provided on a portion of the shaft support portion opposite to a portion facing the work transmission. The working transmission is arranged above the shaft support in a side view, and the shaft support is arranged below the shaft support in a side view.
The paddy field working machine according to claim 1, wherein the clutch operating portion is provided at a lower portion of the shaft support portion opposite to a portion facing the working transmission. The work transmission and the shaft support in the mission case so that the front axle case that supports the front wheels is located on the rear side of the shaft support and below the work transmission in the side view. Connected to the right or left part on the same side as
The paddy field work machine according to claim 2, wherein the linking member for operating the clutch operation unit is arranged between the work transmission and the front axle case in a side view and is connected to the clutch operation unit. .. The work transmission in the mission case so that the filter for lubricating oil inside the mission case is located on the front side of the front axle case and below the work transmission in the side view. And connected to the right or left part on the same side as the shaft support part,
The paddy field working machine according to claim 3, wherein the clutch operating unit is arranged between the front axle case and the filter in a side view. The paddy field working machine according to any one of claims 1 to 4, wherein a recess for avoiding interference with the working transmission is provided in the shaft support portion. An upper rotating body connected to the end of the output shaft protruding from the end of the shaft support, a lower rotating body capable of transmitting power to the second working device, and an end of the shaft support. A tension ring supported by a support member connected to the
An endless transmission body is attached over the upper side rotating body, the lower side rotating body, and the tension ring.
The paddy field working machine according to any one of claims 1 to 5, wherein the power of the output shaft is transmitted to the lower rotating body via the upper rotating body and the endless transmission body.

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