JP2003143903A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that it is necessary to draw a lifting and lowering cylinder near to the vicinity of the rear end of a car body frame having tips of lower links and weight balance of the front and rear of the machine body is deteriorated because the lower links are axially supported on a spring receiver of a shock absorber at the rear end of a cylinder rod though the lower links in the lifting and lowering link mechanism connecting a planting part to the rear of a traveling vehicle are axially supported at the rear end of the cylinder rod of the lifting and lowering cylinder and the lifting and lowering link mechanism is driven by expanding and contracting the cylinder rod in a conventional sulky rice transplanter. SOLUTION: This sulky rice transplanter is obtained by installing the shock absorber 183 in the cylinder rod 15a of the lifting and lowering cylinder 15, installing an extending member 184 extendedly from the shock absorber 183 to the rear and providing a bearing part 185 for axially supporting the front of the lower links 12 at the rear end of the extending member 184.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding rice transplanter, and more particularly to a mounting structure of a lifting cylinder to a lower link in a lifting link mechanism of a planting section.

[0002]

2. Description of the Related Art In a conventional riding type rice transplanter, a planting portion is connected to a rear portion of a traveling vehicle through a lifting link mechanism,
Of the upper and lower parallel links that form the lifting link mechanism,
The lower lower link is connected to a cylinder rod of an elevating cylinder provided on the vehicle body frame via a shock absorbing device for suspension, and the elongating and lowering of the cylinder rod drives the elevating link mechanism up and down. It was The lower link and the elevating cylinder are connected by pivotally supporting the lower link to a fulcrum pin projecting on a spring bearing of the shock absorber.

[0003]

However, since it is difficult to extend the cylinder rod from the viewpoint of stable expansion and contraction, it is necessary to dispose the elevating cylinder body close to the vicinity of the rear end of the vehicle body frame where the lower link tip is located. was there. Therefore, the weight balance before and after the fuselage deteriorates, and in order to improve this, balance weights and the like were attached to the fuselage, but the number of parts increased, which led to deterioration of fuel consumption due to increase in weight of the fuselage and cost increase. there were.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, according to claim 1, the rear part of the vehicle body frame of the traveling vehicle is provided with an elevator cylinder for connecting the planting portion through an elevator link mechanism including a top link and a lower link, and for raising and lowering the elevator link mechanism. In the rice transplanter, a shock absorber is provided on the cylinder rod of the lifting cylinder, an extension member is extended rearward from the shock absorber, and a bearing portion for axially supporting the front portion of the lower link at the rear end of the extension member. Is provided. Claim 2
In the above, the front part of the elevating link mechanism is pivotally supported by a rear frame having an inverted U shape in rear view of the vehicle body frame, and the extending member is arranged in the vicinity of a lower inside position of the rear frame. In the third aspect, the extending direction of the extending member is substantially the same as the extending and contracting direction of the cylinder rod.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is an overall side view of a riding rice transplanter according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a schematic perspective view of a mission case to a vehicle body frame, and FIG.
5 is a front view of a side-row fertilizer applicator, FIG. 5 is a plan view of the same, FIG. 6 is a side sectional view of the same, FIG. 7 is a schematic perspective view between an engine and a mission case, and FIG. 8 is a plan sectional view of a front part of the mission case. 9, FIG. 9 is a side view showing a power transmission configuration to the side-row fertilizer applicator, FIG. 10 is a partial front sectional view showing various clutch mechanisms of the side-fertilizer applicator, and FIG. Sectional view, FIG. 12 is a front view showing a clutch device of a fertilizer feeding device, FIG. 13 is a front view of a unit clutch operating portion, FIG. 14 is a side view of the same, and FIG. 16 is a side view showing the structure of the unit clutch, FIG. 16 is a partially enlarged view of the same side view, FIG. 17 is a plan view showing the structure of the vehicle body cover and unit clutch without the side-row fertilizer applicator, and FIG. Enlarged view, Figure 1
9 is a partial cross-sectional plan view showing the power transmission configuration of the planting portion, FIG.
0 is a side view of the lifting link mechanism, FIG. 21 is a plan view of the same,
22 is a plan view showing the support structure of the top link, FIG.
24 is a side view of the supporting member, FIG. 24 is a plan view of the same, FIG. 25 is a side view of the front portion of the top link, FIG. 26 is a side view of the rear portion of the top link, and FIG. 27 is a plan view showing the posture control configuration of the planting portion. is there.

First, the overall structure of the riding rice transplanter according to the present invention will be described with reference to FIGS. 1 to 3. The riding rice transplanter is composed of a traveling vehicle 1 and a planting section 9 connected to a rear portion of the traveling vehicle 1. Of these, front wheels 2.2 and rear wheels 3.3 are suspended at the front and rear of the traveling vehicle 1, respectively, and at the front of the vehicle body frame 4, an engine 5 as a power unit is mounted and a bonnet 22 is provided. Is covered with.

Spare seedling mounts 90 are provided on both sides of the bonnet 22, and a steering handle 8 is also provided above and behind the bonnet 22. Around the steering handle 8, a main shift lever 75, a seedling joint lever 76 capable of turning on / off all power, an accelerator lever 72, etc. are arranged in the bonnet 22. A main clutch pedal 74 and a brake pedal 73 are arranged on the lower right side.

A mission case 6 which is long in the front-rear direction is disposed in the rear of the engine 5 and substantially in the center of the left and right of the vehicle body frame 4. The front portion of the mission case 6 supports the front wheels 2.2 and the rear portion thereof. The rear wheels 3.3 are supported by. The mission case 6 is covered with a vehicle body cover 18, and a driver's seat 7 is provided at an upper rear portion of the vehicle body cover 18. Further, on the side of the driver's seat 7 of the vehicle body cover 18, the planting part 9 is moved up and down, planting is turned on and off, gear shifting at the time of planting,
A shift lever 77 for operating a line drawing marker and the like, a hydraulic pressure sensitivity adjusting lever 141, and the like are provided.

A planting transmission frame 92 of the planting unit 9 is connected to the rear portion of the traveling vehicle 1 via an elevating link mechanism 10. The up-and-down link mechanism 10 is composed of parallel links of a top link 11 and a lower link 12, and the top link 11 of these is pivotally supported by a rear frame 43 having a reverse U-shape in rear view which constitutes the vehicle body frame 4, An elevating cylinder 15 is connected to the lower link 12,
The lifting cylinder 15 allows the lifting link mechanism 10 to be driven up and down.

A rear axle case 38, which is integrally provided at the rear of the mission case 6, is also connected to the rear frame 43 via a mounting plate 39, and the rear frame 43 is operated above the rear frame 43. A side strip fertilizer applicator 30 is arranged between the seat 7 and the planting section 9.

Of these, the planting section 9 is composed of a seedling table 91 and a plurality of planting claws 93, ..., And the like. The rotary case 100 is supported by the planted transmission frame 92 via rails 95 and guide rails 96 so as to be slidable left and right.
By the rotation of 100 ..., the nails 93.
It is arranged at the rear of the planted transmission frame 92.

Further, a center float 97 and side floats 98, 98 are arranged below the planting section 9. Of these, the center float 97 is arranged on the left-right center line of the traveling vehicle 1, and the side floats 98, 98 are arranged at left-right symmetrical positions on both sides of the center float 97, so that the left-right balance of the planting section 9 is good. The planting posture is kept stable to ensure accurate planting.

The side floats 98, 98 are adjacent to the seedling planting site in each planting strip, and the side strip grooving device 33 is provided.
···············
· Indicates the fertilizer sent from the side-row fertilizer applicator 30 via the transfer hoses 32, 32 ... While forming a groove for supplying fertilizer into the mud layer downward from the ground contact surface. Is applied to the mud layer.

In such a configuration, the front wheels 2.2 and the rear wheels 3.3 are driven to move by using the power of the engine 5 to move and move, and at the same time, the seedling table 9 can be slid to the left and right.
One to one plant seedlings are taken out by the planting claws 93, 93 ..., the seedlings are continuously planted, and the fertilizer can be applied simultaneously with the planting.

Next, the side-row fertilizer applicator 30 will be described. First, the support / arrangement configuration of the side-row fertilizer applicator 30 will be described. As shown in FIGS. 3, 4 and 6, the upper portion of the rear frame 43 having an inverted U-shape in rear view is fixedly attached to the rear portions of the left and right front and rear frames 44, 44, which are constituent members of the vehicle body frame 4. The left and right sides of the upper portion of the rear frame 43 have L-shaped step support frames 109.1 in plan view.
09 are fixed, and the connecting portions are reinforced by support brackets 108. The fertilizer application lower frame 106c is horizontally mounted on the left and right support brackets 108 in the left-right direction of the machine body via stays.

As shown in FIGS. 4 to 6, fertilization side frames 101L and 101R are provided on both left and right ends of the fertilization lower frame 106c, and like the fertilization lower frame 106c, the fertilization front frame 106a and the fertilization front frame 106a. The fertilizer rear frame 106b is installed between the fertilizer side frames 101L and 101R, respectively. Of these, the fertilizer front frame 106a supports the front part of the fertilizer feeding case 13, the fertilizer rear frame 106b supports the rear part of the fertilizer feeding case 13, and the fertilizer lower frame 106c supports the lower portion of the fertilizer feeding case 13. There is. Then, the fertilizer application front frame 106a and the fertilizer application rear frame 106
b, the fertilization lower frame 106c, the fertilization side frames 101L and 101R, etc., constitute the fertilization frame 106.

The side-row fertilizer applicator 30 attached to the fertilizer application frame 106 having such a structure is provided with a fertilizer hopper 49 for storing powdered and granular fertilizer, and a fertilizer feeding device for feeding a predetermined amount of fertilizer in the fertilizer feeding section. Fertilizer feeding case 1 consisting of an upper case 47 for feeding fertilizer and a lower case 56 for feeding fertilizer
3 and the side-grooving groove device 33 of the float 97/98/98
Is equipped with a turbo blower type blower 50 for discharging fertilizer through the flexible type transfer hose 32, and a blower pipe 51 serving as a cylindrical chamber, and one end of the blower pipe 51 (advanced in this embodiment). The blower 50 is attached to the left side in the direction, and the fertilizer feeding case 13 is attached.
.. are arranged above the blower pipe 51. A fertilizer application unit 48 is constituted by the fertilizer hopper 49, the fertilizer feeding case 13, the transfer hose 32, and the like, and the fertilizer application units 48, 48 ... Are arranged side by side in the lateral direction of the machine body.

At the lower end portion of the fertilizer feeding lower case 56, a joining pipe 59 for fitting the front end portion to the blower pipe 51 is connected and connected to the front portion, and the transfer hose 32 is also fitted to the rear portion. Then, the air from the blower 50 is blown out from the blower pipe 51 to the lower end of the fertilizer feeding upper case 47 and the transfer hose 32, and the fertilizer feeding lower case 5
The fertilizer falling to the lower end of 6 is conveyed to the position of the side groove grooving device 33 via the conveying hose 32.

Next, the fertilizer application unit 48 constituting the side-row fertilizer applicator 30 will be described in detail. As shown in FIGS. 6 and 11, the fertilizer feeding case 13 provided in the fertilizer application unit 48 includes the fertilizer feeding upper case 47 and the fertilizer feeding lower case 56 connected below the fertilizer feeding upper case 47 as described above. It consists of and. The fertilizer feeding upper case 47
The lower outlet 49a of the fertilizer hopper 49 is fitted to the inlet 47a on the front side of the upper surface of the fertilizer hopper 49, while the lower front of the fertilizer feeding upper case 47 is detachably fixed to the manure feeding lower case 56 which is inclined forward and upward. There is. The fertilizer feeding lower case 56 is
It is made of hard synthetic resin and is formed into a funnel shape (inverted cone shape).
b is integrally formed, and the fertilizer feeding lower case 56 and the joint portion 56b are communicated with each other through the outlet 56a having a small mouth area.

The front end of the joint portion 56b is
Joining pipe 5 in which the front end is fitted to the blower pipe 51
9 is connected and connected to the rear end portion, and the joint portion 56b
The transfer hose 32 is fitted to the rear end part, and the air from the blower 50 is blown from the blower pipe 51 to the joint part 56b and the transfer hose 32, and the joint part is output from the outlet 56a of the fertilizer feeding lower case 56. The fertilizer falling in the middle of 56b is configured to be conveyed by air to the position of the side-grooving groove device 33 via the conveying hose 32.

As the fertilizer feeding device 14, an inlet board 61 having an inlet 61a, a platter board 63 having a plurality of feeding openings 63a, 63a ... At the same radius of rotation as the inlet 61a, and an outlet ( Exit board 65 having notch) 65a
Each of the substantially circular flat plate-shaped plates 61, 63, 65 is arranged between the fertilizer feeding upper case 47 and the fertilizer feeding lower case 56 in a forwardly tilted and multi-layered manner.

Then, the feeding shaft 66 is rotatably supported in the front of the fertilizer feeding upper case 47 in a forward tilted posture, so that each disc 61.
The lower end side of the feeding shaft 66 is penetrated through the central portion of 63.65, the inlet board 61 and the outlet board 65 are locked to the fertilizer feeding upper case 47, and the feeding shaft 66 is idled with respect to each board 61.65. , The feeding disc 66 is engaged with the feeding shaft 66, and the feeding shaft 66 forcibly rotates the feeding disc 66 to move the fertilizer from the intake 61a into the feeding port 63a to the discharge port 65a. The fertilizer feeding lower case 56 is configured to drop in the direction of the outlet 56a.

In addition, a residual fertilizer outlet 47e is provided in the front part of the fertilizer feeding upper case 47, from which the residual fertilizer in the fertilizer hopper 49 and the fertilizer feeding upper case 47 can be reliably discharged to the outside after the fertilization work is completed. I am trying to remove it. A shutter 82 is provided at the residual fertilizer outlet 47e, and the shutter 82 can be opened and closed by operating the shutter operating lever 84. In this way, the residual fertilizer outlet 47e is opened and closed by opening and closing the shutter 82.

An elbow pipe 85 made of a synthetic resin material is connected to the residual fertilizer outlet 47e, and a flexible discharge hose 86 is connected to the elbow pipe 85. The discharge hose 86 is discharged in a state of being extended laterally of the machine body.

Next, the structure of power transmission to the side-row fertilizer applicator 30 will be described. As shown in FIGS. 3 and 7, the front end portions of the front and rear frames 44, 44 are connected to the back surface of the front frame 40, and a flat plate-shaped support member 41 extends rearward and downward from the left and right center of the front frame 40. The engine 5 is extended horizontally, and the engine 5 is mounted and fixed on the support member 41.

On the left side of the engine 5, an output shaft 11
0 is projected, and a drive pulley 111 composed of a pair of dish-shaped conical pulleys is fixedly mounted on the output shaft 110. On the other hand, from the front part of the mission case 6, an input shaft 112 is projected laterally, and a driven pulley 113 composed of a pair of dish-shaped conical pulleys is similarly attached to the input shaft 112, and the driven pulley 113 is also attached. 113 and the drive pulley 1
A belt 114 is wound around 11 to form a belt type continuously variable transmission mechanism 115. Then, in the belt type continuously variable transmission mechanism 115, by changing the groove width formed between the conical pulleys, each pulley 111.
Mission case 6 by freely changing the effective diameter of 113
The power from the engine 5 can be shifted and input into the inside.

Here, as shown in FIG. 8, a transmission chamber 11 in which various transmission mechanisms are internally provided in the front portion of the transmission case 6.
In the transmission chamber 116, an auxiliary transmission shaft 117 and a main transmission shaft (not shown) are sequentially supported in parallel in the rear of the input shaft 112 in the transmission chamber 116. Behind the shaft 117, a reverse shaft 118, a stock shift shaft 119, and a PTO output shaft 120 are also supported in parallel in order.

As a result, the power input from the engine 5 is transmitted from the input shaft 112 to the auxiliary transmission mechanism 123 of the auxiliary transmission shaft 117, the reverse shaft 118, and the inter-stock transmission shafts 119, P.
It is adapted to be transmitted to the TO output shaft 120 and the like. One end of the input shaft 112 is connected to the output shaft 110 of the engine 5 via the belt type continuously variable transmission mechanism 115 as described above.
On the other hand, the other end of the input shaft 112 is projected to the right outside from the mission case 6, and a clutch mechanism 121 is provided on the projecting portion to freely control the power output from the input shaft 112. I am able to connect and disconnect. Further, the PTO clutch 122 is also provided on the PTO output shaft 120.
Is provided so that only power to the PTO output shaft 120 can be connected and disconnected.

A planted transmission chamber 124 is formed on the right side of the speed change chamber 116, and a planted PTO shaft 36 having an axial center in the front-rear direction is pivotally supported at the rear of the planted transmission chamber 124. The rear end of the planted PTO shaft 36 is connected to a planting section 9, which will be described in detail later, to transmit power for driving the seedling planting device. Similarly, a work transmission chamber 125 is formed on the left side of the transmission chamber 116, and a work PT having a shaft center in the front-rear direction is also formed on the rear portion of the work transmission chamber 125.
An O shaft 35 is pivotally supported.

The front end of the planted PTO shaft 36 is connected to the PTO output shaft 1 via the bevel gears 127 and 128.
20 Work PTO shaft 3 while being linked and linked to the right end
The front end of No. 5 is PT via the bevel gear 129/130.
An output system 131 for planting drive and an output system 132 for fertilizer application are respectively configured to be linked and linked to the left end portion of the O output shaft 120. The power take-out mechanism 31 is formed from these output systems 131 and 132, the PTO clutch 122, and the like. Are formed.

Then, as shown in FIG. 9, in the power take-out mechanism 31, the power to the side-row fertilizer applicator 30 taken out from the work PTO shaft 35 is continuously variable connected to the rear end of the work PTO shaft 35. Continuously variable transmission input shaft 34 of device 34
The power input to the variable speed transmission 34b and changed in speed by the continuously variable transmission 34 is transmitted to the transmission shaft 3 connected to the continuously variable transmission output shaft 34c.
7b, and further transmitted to the shift output shaft 133 via a bevel gear 37a provided at the rear end of the transmission shaft 37b and a bevel gear 133a provided on the shift output shaft 133. During this time, the continuously variable transmission 34 adjusts the amount of fertilizer fed out from the fertilizer feeding case 13, and the safety clutch device 37 causes the fertilizer to idle when an excessive force is applied.

Here, in the continuously variable transmission 34, a speed change operation shaft 34a which is an operation member extending upward and frontward is provided.
Is provided, and the transmission operating shaft 34a has a transmission shaft 52
Is connected, and a metering dial 29, which is a metering operation section, is fitted to the upper end thereof. And the metering dial 2
When the gear 9 is rotated, the gear shift operation shaft 34a also rotates, and the continuously variable transmission 34 is geared to adjust the output speed.

A bracket 25 fixed to the front surface of the continuously variable transmission 34 is fixed with a stay 25 having a U-shape in a side view.
Is supported. A tubular member 25a vertically penetrating the stay 25 is fixed to the open side of the stay 25, and the transmission shaft 52 penetrates the tubular member 25a. The transmission shaft 52 is inserted by the bracket 26 and the stay 25. The transmission member including the gear shift operation shaft 34a and the like is supported up to the upper side.

Above the stay 25, the drive gear 28 is fitted on the transmission shaft 52 and the metering dial 29 is installed.
When is rotated, the transmission shaft 52, the drive gear 28, and the speed change operation shaft 34a are simultaneously rotated coaxially, and the drive gear 28 among them is integrally formed on the outer peripheral portion of the disc-shaped indicator 23. It meshes with the formed gear part. With this, when the metering dial 29 is rotated, the indicator 23 and the speed change drive shaft 34a can be rotated in conjunction with each other, and the amount of fertilizer to be fed out can be set using the scale engraved on the upper surface of the indicator 23 as a guide. Can be adjusted to a predetermined amount.

Then, as shown in FIGS. 4, 6, and 9 to 11, the variable speed output shaft 133 is mounted on the support plate 106d disposed substantially in the center of the fertilizer application frame 106 through the rotary shaft 104. A feeding input shaft 134 protruding from a fixed drive case 46 is linked and interlocked with, and a feeding drive shaft 45 extending in the lateral direction of the machine body is connected to the feeding input shaft 134 via a pair of bevel gears 42. It is linked.

The feeding drive shaft 45 includes a plurality of shafts 45a.4.
5b / 45c ..., which are connected to each other by a connecting tool 69 and which are adjacent to each other fertilizing unit 48.4
A clutch device 70 (FIG. 10) is interposed between the shafts 8 and 8, and the fertilization units 48, 48 for the left and right two rows can be selectively driven by the unit clutch operating portion 102. .. are provided at the front of the side-row fertilizer applicator, and the fertilizer application units 48, 48 ... Can be selectively driven by the row-stop operating rod 71. There is.

In such a structure, the power transmitted from the feeding drive shaft 45 is supplied to the pair of bevel gears 68.
When the feeding shaft 66 is driven via 66a, the fertilizer in the fertilizer hopper 49 is fed by the joint portion 5 by a predetermined feeding amount.
The fertilizer that has fallen in the middle of 6b is directly transported to the position of the side-grooving groove device 33 via the transport hose 32.

Next, the line-stop clutch mechanism and the unit clutch mechanism attached to the side-line fertilizer applicator 30 will be described. As shown in FIG. 1, FIG. 2, FIG. 4, and FIG. 6, the side-row fertilizer applicator 30 transmits or disconnects power to the fertilizer feeding device 14, 14, ... for each fertilizer unit 48, 48. Selectable line stop clutch mechanism and planting claws 9 for every two lines
3 and the unit clutch levers 81, 81 for operating the operation or stop of the seedling feeding belt 99, the fertilizer feeding device 14 of the two sets of fertilizer application units 48, 48 corresponding to these two articles.
・ It is equipped with a unit clutch mechanism that enables operation of power transmission to or disconnection from 14 ... Both of these streak clutch mechanism and unit clutch mechanism are configured to operate the clutch device 70 to operate the intermittent state of the input. In the streak clutch mechanism, the streak operation rod 71 is connected to the unit clutch mechanism. Then, the unit clutch lever 81 is separately provided as an operation member, and the clutch device 70 can be operated in each of them.

As shown in FIGS. 9 to 12, as described above, the power transmitted to the drive case 46 via the continuously variable transmission 34 passes through the drive case 46 and the feed drive shaft 4 is passed through.
5 is transmitted. And each fertilizer unit 48
A clutch case 70a, 70a ... Is attached to the upper part of the fertilizer feeding case 47, 47 .., and the clutch device 70, 70.
Is provided inside, and the feeding drive shaft 45 passes through the inside of the clutch cases 70a.

The feeding drive shaft 45 has a drive bevel gear 68 loosely fitted to the feeding drive shaft 45 in the fertilizer feeding case 47, and the driving bevel gear 68 meshes with a driven bevel gear 66a fitted to the upper end of the feeding shaft 66. ing. The drive bevel gear 68 is integrally formed with a fixed side clutch pawl 68b on the side opposite to the tooth 68a, and the fixed side clutch pawl 68b is slidably fitted to the feeding drive shaft 45 by spline fitting or the like. It is arranged so that it can be engaged with the fitted sliding side clutch pawl 67. The sliding side clutch pawl 67 is fixed between the sliding case clutch 70a and the sliding side clutch pawl 67 by an urging spring 79 fitted to the feeding drive shaft 45. 68b is always urged in the direction in which it meshes with 68b.

A pin 62A, which is a clutch pawl engagement operation member fixed to a clutch arm 62 rotatably provided outside the clutch case 70a, is a pin formed in the middle of the sliding clutch pawl 67. The sliding arm clutch 62 is inserted into the insertion portion 67a, and the pin 62A is moved by the rotation of the clutch arm 62 to move the sliding side clutch pawl 67 to the side opposite to the stationary side clutch pawl 68b. The occlusion with the side clutch pawl 68b is forcibly released. On the contrary, the clutch arm 62
When the pin 62A is rotated and the pin 62A is moved to the fixed clutch pawl 68b side, the sliding clutch pawl 67 is biased toward the fixed clutch pawl 68b by the biasing spring 79, and the fixed clutch pawl 68b is moved. The sliding side clutch pawl 67 is in an engaged state.

The clutch arm 62 is provided with either a cam 64 arranged to abut the clutch arm 62 or an operation wire 87 connected to enable the clutch arm 62 to be operated by the unit clutch lever 81. The state is configured to be operable.

Then, as shown in FIGS. 6 and 12, the cam 64 is fixed to the rear end portion of the rod stopping operation rod 71 which is an input intermittent operation member for the fertilizer feeding device 14, The stopping operation rod 71 is adapted to be rotated together with the rotation. The row stopping operation rod 71 is supported by brackets 135 and 136 provided on the front fertilizer application frame 106a and the rear fertilizer application frame 106b, and is disposed so as to pass through the side of the fertilizer feeding case 47 in the front-rear direction. It can be operated from the front of the line fertilizer applicator 30 and forms a line stop clutch mechanism.

On the other hand, as shown in FIGS. 12 to 14, the lever mounting member 13 is provided on the fertilization front frame 106a which constitutes the fertilization frame 106 for supporting the lateral fertilizer applicator 30.
9 are erected, and left and right stays 142 are fixedly mounted on the front portion of the lever mounting member 139 via a unit lever base 140. The stay 142 is provided with a rotation support shaft 143 for supporting the unit clutch lever 81 in a substantially horizontal direction, and the stay 142 has guide grooves 144a, 144a of the unit clutch lever 81, 81 opened in the vertical direction. A cover 144 is fitted.

The unit clutch lever 81.8
1, a wire attachment pin 145 is fixedly installed substantially parallel to the rotation support shaft 143, and the operation wire 87 is attached to the wire attachment pin 145 by two sets of fertilization units 48, 48. The fertilization unit operation wire 137 is connected via a connecting member 146, and the clutch device 70, 70 of either the left or right set of the fertilization unit 48, 48 is connected / disconnected by operating one unit clutch lever 81. To be able to operate. Further, the wire attachment pin 145 has two rows of planting unit operation wires 138 and 13 which are interlocked with the planting claw 93 and the seedling feeding belt 99.
8 is connected via a connecting member 147, and by operating a single unit clutch lever 81, the on / off operation of the clutch device of either one of the left and right sets of the planting unit can be operated. In other words, the planting claw 93.9 for each unit
3, seedling feeding belt 99.99 and fertilizer unit 48.4
8 can be operated or stopped, and a unit clutch mechanism is formed.

In such a structure, the unit clutch levers 81, 81 are rotated upward along the guide grooves 144a, 144a to move the unit clutch "disengaged" position 14
When set to 8, the driving of the planting claws 93, 93, seedling feeding belt 99, 99 and fertilizer application unit 48, 48 of the selected unit is stopped, while the unit clutch levers 81, 81 are moved along the guide grooves 131a, 131a. When the unit clutch is turned to the "ON" position 149, the planting claws 93, 93, the seedling feeding belt 99, 99 and the fertilizer application unit 48, 48 of the selected unit are activated.

Next, the vehicle body cover 18 of the riding rice transplanter to which the side-row fertilizer applicator 30 having the above-described structure can be attached and detached.
The structure of will be described. 3, 7, 15, and 17
As shown in FIG.
It is composed of a front cover 19 that covers the periphery of the bonnet, and a step 20 that covers from the rear of the bonnet 22 to the rear part of the driver's seat 7. It will be extended. Note that the following description will be focused on the case where the side-row fertilizer applicator 30 is not installed from the beginning and the side-row fertilizer applicator is not mounted.

In the step 20, the step 20c located behind the hood 22 and in front of the driver's seat 7 is called the driver's seat 7
Steps 20b and 20b located on the side of the pedestal, a pedestal portion 20d for installing the driver's seat 7, and a cutout portion 20a that is open at the rear of the rear end portion of the pedestal portion 20d and are integrally formed. ing. The body frame 4 is arranged below the step 20.
A pedestal support frame 150 having an inverted U-shape in a front view is horizontally installed between the front and rear frames 44 of the pedestal support frame 1.
The upper surface of the pedestal portion 20d has the upper surface of
It is fixed at 1. Further, in the step 20b.2.
0b is fixed to the tip end of a step support frame 109/109 which is fixed to the left and right sides of the rear frame 43 and is L-shaped in a plan view by a fastening member 152. It is supported by the vehicle body frame 4 via 109 and a pedestal support frame 150. Then, such a cutout portion 20 of step 20
Below the a, the metering dial 29, which is capable of shifting the continuously variable transmission 34 and adjusting the feed amount of fertilizer, is arranged.

Further, as shown in FIG. 3 and FIGS. 15 to 17, the extension step 21 is a step 21b which is used as a scaffolding for seedling splicing work, fertilizer replenishment work and the like, and is extended forward from the front end of the step 21b. It comprises a fitting portion 21a which can be fitted into the cutout portion 20a. And the rear frame 4
A support bracket 108 is fixed as a reinforcing member to the upper surface of the connecting portion between the step support frame 109 and the step support frame 109 that is L-shaped in a plan view.
b is fixed by the fastening member 153, and the extension step 2
1 is supported and fixed to the vehicle body frame 4 via a support bracket 108. Due to the fitting portion 21a of the extension step 21 as described above, when the side-row fertilizer applicator is not attached,
The notch 20a is closed. Although the side-row fertilizer applicator is installed, when the side-row fertilizer applicator is not required and the other parts of the side-row fertilizer applicator 30 are removed while leaving the metering operation section and the continuously variable transmission 34, FIG. As shown in, the metering dial 29 is covered from above.

In the case of the side-row fertilizer application specification with the above configuration, as shown in FIGS. 6 and 9, the side-row fertilizer applicator 30 is mounted on the left and right support brackets via the fertilizer lower frame 106c. The metering dial 29 can be metered through the notch 20a provided at the rear end of the step 20 while being mounted laterally on 108.
On the other hand, in the case where the side-row fertilizer applicator is not attached, the configuration shown in FIGS.
As shown in FIG. 7, the space without the side-row fertilizer applicator 30 can be covered with the extension step 21, and the extension step 2
With the one fitting portion 21a, the space provided for operating the metering dial 29 can be reliably closed.

That is, the planting portion 9 is connected to the rear portion of the traveling vehicle 1 so as to be movable up and down, and the traveling vehicle 1 is located in front of the planting portion 9.
The side-row fertilizer applicator 30 is attached to the rear part of the rear side, and the side-row fertilizer applicator 30 is provided with a fertilizer feeding device 14 capable of adjusting the amount of fertilizer feeding. Extension step 2 to cover the rear part of the traveling vehicle when the fertilizer applicator is not installed
In the riding rice transplanter provided with No. 1, a notch 20a for operating the metering dial 29 which is the metering operation section of the fertilizer feeding device 14 is provided at the rear end of Step 20 so as to be opened rearward. At the same time, since the fitting portion 21a that fits into the cutout portion 20a is provided at the front end portion of the extension step 21, the cutout portion 20a of step 20 is formed by using the fitting portion 21a integrally provided in the extension step 21. Can be blocked,
It is not necessary to separately prepare the step without the cutout hole 20a for the specification without the side-row fertilizer applicator, the same step 20 can be used regardless of the presence or absence of the side-row fertilizer applicator, and the shared rice transplanter parts can be shared. It is possible to reduce the cost of parts. Further, as compared with the case where a closing member for closing only the cutout portion 20a is separately prepared, it is possible to prevent an increase in the number of parts, the structure is simplified, and the assemblability and the maintainability are improved.

Further, since the fitting portion 21a is provided above the metering dial 29, which is a metering operation section, the side-row fertilizer applicator is not required and can be removed when the side-row fertilizer applicator is installed.
Even when the extension step is attached, the metering operation section remaining on the machine side does not disturb the seedling splicing work and the fertilizer replenishment work to the fertilizer applicator, and the workability is greatly improved.

Next, in the riding rice transplanter equipped with the vehicle body cover 18 and the side-row fertilizer applicator 30 which can be attached and detached, the arrangement and mounting structure of the unit clutch operating portion will be described in detail. As shown in FIGS. 6 and 14, in the case where the side-row fertilizer applicator is installed, as described above, the lever attachment member is provided on the fertilizer front frame 106a that constitutes the fertilizer frame 106 that supports the side-row fertilizer applicator 30. 139 is erected, and a unit lever base 140 is detachably fixed to the front part of the lever mounting member 139 by a plurality of fastening members 156. The unit lever base 140 is provided with the stay 142 and a rotation support. Shaft 143, unit clutch lever 81
The unit clutch operation unit 102 including the above is fixed.

On the other hand, as shown in FIGS. 16 and 18, when the side-row fertilizer applicator is not attached, the fertilizer application frame 106 is used.
The flange portion 154a of the lever base stay 154 has a plurality of fastening members
57 is detachably fixed to the lever base stay 154 and is attached to the upper end of the pipe portion 154b of the lever base stay 154.
5, the same unit lever base 140 as in the case of the side-row fertilizer application specification is detachably fixed by a plurality of fastening members 156, and the unit clutch operating portion 103 is fixed to the unit lever base 140. . The lever base stay 154 has a structure in which a flange is joined to the lower end of a single pipe by welding or the like, and as long as a necessary pipe diameter is secured, the single pipe can provide uniform rigidity in all directions. , So that a good operation feeling can be obtained.

As described above, the same unit lever base 140 can be used in the arrangement of the unit clutch operating portions 102 and 103 for providing the unit clutch lever 81 regardless of whether the side-row fertilizer applier is attached or not. Since the unit clutch operating portions 102 and 103 are attached to the support bracket 108 of the same main body side member, the function can be easily expanded by retrofitting, and the parts and mounting structure of the riding rice transplanter can be shared. Thus, the manufacturing cost can be reduced and the assembling property can be improved.

Further, the unit clutch operating portion 103 can be arranged forward without bending the rear end of the extension step 21 by bending only the upper and lower intermediate portions of the pipe portion 154b of the lever base stay 154 so as not to interfere with the rear end thereof. I have to. In this way, the lever base stay 154 has a structure capable of bypassing the extension step 21, so that the unit clutch lever 81 becomes closer to the driver's seat 7 and the lever operation becomes easier, and at the same time, the seedling mounting base 91 of the planting section 9 can be used. The extension step 21 can be maximized without any interference, and operability such as seedling splicing is also improved.

The unit clutch operating portion 103 in the case where the side-row fertilizer applicator is not mounted is the fertilizer unit operating wires 137 and 137 from the unit clutch operating portion 102 in the case where the side-row fertilizer applicator is installed. 4 planting unit operation wires 138
Use the same one as for the side-row fertilizer applicator. In this way, the same parts can be used for the planting unit operation wire 138 that is linked and linked to the planting claw 93 and the seedling feeding belt 99 regardless of whether the side-row fertilizer applicator is attached or not attached. It will be easier to reduce the number of control parts for passenger rice transplanters and add functions by retrofitting.

Next, the planting section 9 capable of simultaneously performing fertilization work by the side strip fertilizer applicator 30 will be described. First,
The power input configuration to the planting unit 9 will be described. As shown in FIG. 8, as described above, the planted transmission chamber 124 is formed on the right side of the transmission chamber 116 at the front of the transmission case 6.
The planted PTO shaft 36 extends rearward from the planted transmission chamber 124 along the side surface of the mission case 6.

Here, as shown in FIGS. 1 and 19, the planting transmission frame 92 of the planting section 9 has four sets of rotary planting consisting of one rotary case 100 and two planting claws 93. The device 158 and the drive mechanism in the rotary case 100 for driving the planting claw 93 are attached to the planting drive shaft 159R.
Left and right transmission pipes 16 that transmit power via 159L
0R / 160L and a connecting pipe 161 connecting between the transmission pipes 160R / 160L, and
A plurality of bevel gears are connected and interlocked between the transmission shaft 162 installed inside the connection pipe 161 and the planted drive shafts 159R and 159L.

A cross pipe joint 163 is connected to the right end of the connecting pipe 161, and an input bevel gear 164 is rotatably supported on the cross pipe joint 163. The input bevel gear 164 is connected to the right end of the transmission shaft 162 via a bevel gear 165.
The left end of 2 is connected to the front end of the planted drive shaft 159L via bevel gears 167 and 168, and the input bevel gear 164 is also connected to the front end of the planted drive shaft 159R via bevel gears 165 and 166. Bevel gear 1
The motive power input to 64 is the rotary case 100.1.
It is designed to be transmitted within 00 ...

As shown in FIG. 21, the front end portion of the input bevel gear 164 is connected to the rear end of the planted PTO shaft 36 through a joint portion 169, and the joint portion 169 is a front and rear universal joint. 169
a.169b and the universal joint 169a.
It is composed of a connecting pipe 169c having 169b fixed at the front and rear ends, and enables stable power transmission even if the planting transmission frame 92 moves during the planting work. Further, the joint portion 169 is arranged rearward of the rear frame 43, which is installed in the rear end of the vehicle body frame 4 and has an inverted U-shape in rear view.

Thus, as shown in FIGS. 8 and 21,
The planted PTO shaft 36 is arranged along the side of the mission case 6, and the universal joint 16 is provided between the planted PTO shaft 36 and the input bevel gear 164 which is the planting input unit.
9a and 169b are connected and linked by a joint portion 169, and the joint portion 169 is connected to the vehicle body frame 4
Since the rear end of the rear frame 43 at the rear end is disposed, the rear end of the planted PTO shaft 36 can be brought close to the planting part 9, and the expansion / contraction amount and the bending angle θ of the joint part 169 can be made small. It is possible to reduce the load applied to 169 and extend the service life, and to reduce the frequency of replacement to reduce the cost of spare parts and improve maintainability.

Next, the raising / lowering structure of the planting section 9 will be described. As shown in FIG. 1 and FIG. 20, in the planting section 9, as described above, the seedling placing table 91 arranged at the front high and the low low is provided with the plant transmission frame 92 via the lower rail 95 and the guide rail 96. Is horizontally slidably supported on the left and right sides, a hitch 94 is provided in the front part of the planted transmission frame 92 via the rolling fulcrum shaft 17, and the top link 11 is pivotally supported on the upper part of the hitch 94. Similarly, the lower link 12 is pivotally supported below the hitch 94.

The top link 11 among them will be described. As shown in FIGS. 3, 20, and 22 to 24,
The top link 11 is connected to a rear portion of a supporting member 54 provided on the rear frame 43 through a connecting pin 170 so as to be vertically rotatable, and the supporting member 54 has an inverted U-shape in a front view, and has right and left side surfaces. A mounting hole 54c is opened in the rear part,
A mounting pipe 171 is fixed to the mounting holes 54c and 54c, and the connecting pin 170 that pivotally supports the front end of the top link 11 is horizontally mounted on the mounting pipes 171 and 171.

Further, a standing wall 54b is erected on the front part of the upper part of the support member 54, and at the rear of the standing wall 54b, in a substantially central portion of the support member 54 in the front-rear direction, there is a concave shape opened upward. A notch portion 54a is formed, and the notch portion 54a is fitted and fixed to the rear frame 43 substantially at the right and left central portions from below, so that the top link 11 is pivotally supported at the rear portion of the vehicle body frame 4 via a support member 54. I have to.

Then, as shown in FIGS. 16 and 18, the lower surface of the rear portion of step 20 is placed and supported on the upper surface of the support member 54, and the extended step 2 behind the step 20 is carried out.
The lower surface 1 is also placed and supported over substantially the entire length in the front-rear direction.
As a result, the support member 54 that pivotally supports the top link 11 can simultaneously mount and support the step 20 and the extension step 21.

That is, in the riding rice transplanter in which the planting portion 9 is connected to the rear portion of the vehicle body frame 4 of the traveling vehicle 1 via the elevating link mechanism 10 including the top link 11 and the lower link 12, the front portion of the top link 11 is connected. Is supported by a supporting member 54 arranged at the rear portion of the vehicle body frame 4, and the rear portion of step 20 covering the vehicle body frame 4 is supported by the supporting member 54, so that the top link 11 and the supporting member of step 20 are shared. Therefore, the number of parts can be reduced, the weight of the body can be reduced, and the fuel consumption can be improved and the cost can be reduced, and the simplification of the structure can improve the assemblability and the maintainability.

Since the extension step 21 covering the rear portion of the vehicle body frame 4 is extended behind the step 20 and the extension step 21 is supported by the support member 54, in addition to the support member of step 20, Even the supporting member of the extension step 21 can be shared, and the fuel economy and cost can be reduced by reducing the weight of the machine, and the assembling and maintenance can be further promoted by simplifying the structure.

Further, the upright wall 54b is provided with the support member 5
A part of 4 is cut out in a U shape and bent vertically from the upper surface so that it can be easily manufactured, and the rear edge portion 20e of the step 20 is in contact with the front surface. Thus, the standing wall 54b acts as a stopper that restricts the rearward movement of the step 20.

That is, since the standing wall 54b for restricting the rear position of the step 20 is integrally provided on the support member 54, when the worker performs seedling splicing work or fertilizer replenishing work, the weight of the worker is changed. Even if the step 20 bends due to this, the rearward protrusion of the step 20 is reliably regulated by the standing wall 54b, a stable scaffold can be secured, and workability on the step 20 can be greatly improved. You can do it.

The lower link 12 will be described.
As shown in FIG. 3, FIG. 20, FIG. 21, and FIG. 25, the lower link 12 has a support 12a having a triangular shape in a side view at the front part of the lower link 12, and the lower front part of the support 12a is the rear part. The support body 1 is pivotally supported by a support shaft 172 which is horizontally mounted via a mounting stay 194 between the left and right lower portions of the frame 43.
A connecting pin 173 is horizontally mounted on the upper portion of 2a, and a reinforcing arm 12b for increasing the rigidity of the lower link 12 is connected between the connecting pin 173 and the rear end of the lower link 12. Then, the same connecting pin 173 is connected to the rear portion of the elevating cylinder 15 via a connecting mechanism 174 so that the elevating link mechanism 10 can be driven up and down.

A support pipe 175 is horizontally installed at a substantially central portion in the front-rear direction of the front and rear frame 44, and a connecting plate 176, is formed at a substantially central portion in the left-right direction of the support pipe 175.
176 is fixedly mounted, and the front end base of the lifting cylinder 15 is connected to the connecting pin 177 between the connecting plates 176 and 176.
When the elevating link mechanism 10 is driven up and down, the elevating cylinder 15 pivots up and down to follow up and down of the planting section 9.

Here, in the connecting mechanism 174,
A shock absorber 183 is provided at the tip of the cylinder rod 15a of the lifting cylinder 15, and in the shock absorber 183,
A cylindrical spring receiving case 178 is externally fitted so as to be slidable along the cylinder rod 15a.
Cushion material 179 is internally provided in FIG. A spring receiver 182 is fixed to the rear end of the cylinder rod 15a behind the cushion member 179, and a washer 18 is provided between the spring receiver 182 and the cushion member 179 in order from the front.
0 and a cushion spring 181 are slidably fitted on the cylinder rod 15a.

The front ends of the extending members 184 are fixedly mounted on the left and right side surfaces of the spring receiving case 178 of the shock absorber 183. The extending members 184 are located inside the rear frame 43 and below the rear frame 43. Of the same extension member 184.
The rear end supports the left and right ends of the connecting pin 173 that pivotally supports the front ends of the support body 12a and the reinforcing arm 12b to form a bearing portion 185.

In such a structure, when the elevating link mechanism 10 is driven to expand and contract the cylinder head 15a, the expansion and contraction force is the cylinder rod 15a → the cushion spring 181 → the spring receiving case 178 → the extending member 184 → the bearing portion. Since the lower link 12 is transmitted to the lower link 12 as in 185 and the lower link 12 is driven through the shock absorber 183, the planting section 9 does not suddenly move up and down, and the planting section 9 collides with a ridge or the like. Even in this case, the overload is reduced, and the entire planting part 9 or each drive mechanism in the planting part 9 does not have to be subjected to a severe impact. Further, the extending member 184 is interposed between the lower link 12 and the elevating cylinder 15, and the elevating cylinder 15 can be arranged in front of the machine body by the amount of the extending member 184.

That is, the planting portion 9 is connected to the rear portion of the vehicle body frame 4 of the traveling vehicle via the elevating link mechanism 10 composed of the top link 11 and the lower link 12, and the elevating cylinder 15 for vertically moving the elevating link mechanism 10. In the riding rice transplanter provided with, a cushioning device 183 is provided on the cylinder rod 15a of the lifting cylinder 15, an extension member 184 is extended rearward from the cushioning device 183, and the extension member 184 has a rear end portion at the rear end portion. Since the bearing portion 185 that pivotally supports the front portion of the lower link 12 is provided, not only can the planting portion 9 be protected and stable lifting control can be performed, but also the lifting cylinder can be arranged in the front of the machine body as much as possible. The weight balance between the front and rear can be improved, and the balance weight can be reduced compared with the conventional model, which reduces the weight of the machine and improves fuel efficiency and parts cost. It can be.

Furthermore, the front portion of the lifting link mechanism 10 is
Rear U-shaped rear frame 4 at the rear of the vehicle body frame 4
Since the extension member 184 is arranged near the inner lower position of the rear frame 43, the rear frame 43 can surround and protect the extension member 184 during the planting operation. It is possible to reliably prevent interference from other drive parts.

The extension member 184 is extended along the extension line of the axis of the cylinder rod 15a, and the bearing portion 185 for axially supporting the lower link 12 is arranged on the extension / contraction direction line of the cylinder rod 15a. I am trying to do it.
As a result, the expansion and contraction force of the cylinder rod 15a directly acts on the bearing portion 185 without being dispersed, the elevating link mechanism 10 is efficiently moved up and down, and further, from the planting portion 9 side and the elevating cylinder 15 side. Force is applied vertically to the shock absorber.

That is, since the extending direction of the extending member 184 is substantially the same as the extending / contracting direction of the cylinder rod 15a, the elevating link mechanism 10 and the shock absorber 183 operate efficiently to perform a quick and reliable elevating operation. Can be enabled.

A parallel link that can be moved up and down is formed from the top link 11 and the lower link 12 as described above.
Even if the plant is raised and lowered according to the unevenness of the field, the planting posture of the planted seedlings does not change.

Next, the posture control mechanism of the planting section 9 will be described. As shown in FIG. 1, FIG. 20, FIG. 26, and FIG. 27, a nursery stand support frame 188 having a gate shape in a rear view is erected in front of and above the planting transmission frame 92. The guide rail 96 is supported so as to be slidable left and right by the 188, and the outer ends of the rolling correction springs 187 and 187 are hooked on the left and right ends of the guide rail 96. On the other hand, the hitch 94 is erected at substantially the right and left center of the planted transmission frame 92.
A support stay 186 extends from the upper part to the front upper part, and the rolling correction spring 1 is provided at the front part of the support stay 186.
The inner ends of 87 and 187 are hooked, and the spring force forcibly corrects the lateral inclination (rolling) of the seedling placing table 9 to control the posture of the seedling placing table 9.

Regarding the posture control of the planting transmission frame 92 that supports the seedling table 9, the rear portions of the left and right transmission pipes 160R and 160L that transmit power into the rotary case 100 that drives the planting claw 93, Also, a center float 97 and left and right side floats 98.9 are attached to a mounting member (not shown) extending rearward from the planted transmission frame 92.
8 are pivoted and these floats 97, 98, 98
Center float 9 by receiving the field surface at
7, the planting section 9 is held at a constant height, while the left and right side floats 98, 98 hold the planting section 9 horizontally with respect to the field.

In addition to this, a horizontal return mechanism 193 is provided between the planted transmission frame 92 and the lower link 12. In the horizontal return mechanism 193, the bifurcated arm 12c forming a lower portion of the lower link 12 and having an inverted U-shape in plan view.
A rear end of the rear end is pivotally supported by a connecting pin 192 at a lower portion of the hitch 94 so as to be vertically rotatable, and lower link stays 190, 190 are horizontally provided on an outer surface of the bifurcated arm 12c in front of the connecting pin 192. Cushioning members 191, 191 made of an elastic body such as rubber are fixedly provided on the lower surface of the lower link stays 190, 190 which are projected.

On the other hand, the lower link stays 190, 190
Stays 189, 189 on the side of the planting frame for receiving the cushioning members 191, 191 are projectingly provided forward from the front surface of the transmission frame 92 for the planting on the lower rear side of the mounting position. Support surfaces 189a and 189a are formed diagonally above and in the front of the plant, and when the planting part 9 is rotated left and right, the support surfaces 189a and 189a are brought into contact with the cushioning members 191 and 191 and The lateral rotation of the attachment 9 is supported and regulated. In addition, the support position interval at this time, that is, the interval between the left and right stays is wide, and stable support is possible.

With such a structure, even if the planting portion 9 is in a rolling state during the planting work, when the planting portion 9 is operated to move upward, the planting transmission frame 92 is moved around the rolling fulcrum shaft 17. By rotating, the posture of the planting part 9 quickly returns to a position where the planting frame side stays 189, 189 abut the lower link side stays 190, 190, that is, a horizontal posture.

That is, since the stay 190 to which the cushioning material 191 is attached is arranged on the lower link 12 and the stay 189 for receiving the stay 190 is arranged on the planted transmission frame 92, the lower link 12 and the lower link 12 are connected. The planted transmission frame 92 can be directly supported at wide intervals, and the posture can be reliably returned to the center and horizontal.

The lower link stay 190. 1
90 may be provided so as to project obliquely rearward and downward.
As a result, the cushioning members 191 and 191 can vertically contact the supporting surfaces 189a and 189a of the planted frame side stays 189 and 189, thereby preventing the cushioning members 191 and 191 from being damaged due to shear stress. can do.

[0088]

Since the present invention is configured as described above, it has the following effects. That is, as in claim 1, the planting portion is connected to the rear portion of the vehicle body frame of the traveling vehicle through the elevating and lowering link mechanism including the top link and the lower link, and the elevating and lowering cylinder for vertically driving the elevating and lowering link mechanism is provided. In a riding rice transplanter, a shock absorber is provided on a cylinder rod of the lifting cylinder, an extension member is extended rearward from the shock absorber, and a bearing for pivotally supporting a front portion of the lower link at a rear end of the extension member. Since the part is provided, not only can the planting part be protected by the shock absorber and stable lifting control can be performed, but also the lifting cylinder can be placed as much as possible in front of the machine, improving the weight balance before and after the machine, It is possible to reduce the balance weight and the like as compared with the conventional one, and it is possible to reduce the weight of the machine body, improve fuel efficiency and reduce the cost of parts.

According to a second aspect of the present invention, the front part of the elevating link mechanism according to the first aspect is pivotally supported by a rear frame having an inverted U-shape in rear view at the rear part of the vehicle body frame, and near the inner lower position of the rear frame. Since the extension member is disposed, the rear frame can surround and protect the periphery of the extension member,
It is possible to reliably prevent interference from other drive parts during the planting work. Further, the inner space of the rear frame can be effectively used.

As in claim 3, claim 1 or claim 2
Since the extending direction of the extending member described is substantially the same as the extending and contracting direction of the cylinder rod, the elevating link mechanism and the shock absorber can operate efficiently, and a quick and reliable elevating operation can be performed. is there.

[Brief description of drawings]

FIG. 1 is an overall side view of a riding rice transplanter according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic perspective view of a mission case to a vehicle body frame.

FIG. 4 is a front view of a side-row fertilizer applicator.

FIG. 5 is a plan view of the same.

FIG. 6 is a partial side sectional view of the same.

FIG. 7 is a schematic perspective view between an engine and a mission case.

FIG. 8 is a plan sectional view of a front portion of a mission case.

FIG. 9 is a side view showing a power transmission configuration to a side-row fertilizer applicator.

FIG. 10 is a partial front cross-sectional view showing various clutch mechanisms of a side-row fertilizer applicator.

FIG. 11 is a partial side cross-sectional view showing the operation configuration of the fertilizer application unit.

FIG. 12 is a front view showing a clutch device of the fertilizer feeding device.

FIG. 13 is a front view of a unit clutch operating portion.

FIG. 14 is a side view of the same.

FIG. 15 is a side view showing a structure of a vehicle body cover and a unit clutch in a side strip fertilizer application-less specification.

FIG. 16 is a partially enlarged view of the side surface of the same.

FIG. 17 is a plan view showing a structure of a vehicle body cover and a unit clutch in a specification without a side-row fertilizer applicator.

FIG. 18 is a partially enlarged view of the same plane.

FIG. 19 is a plan partial cross-sectional view showing the power transmission configuration of the planting part.

FIG. 20 is a side view of the lifting link mechanism.

FIG. 21 is a plan view of the same.

FIG. 22 is a plan view showing a support structure of a top link.

FIG. 23 is a side view of the support member.

FIG. 24 is a plan view of the same.

FIG. 25 is a side view of the front portion of the top link.

FIG. 26 is a side view of the rear portion of the top link.

FIG. 27 is a plan view showing a posture control configuration of a planting unit.

[Explanation of symbols]

1 traveling vehicle 4 body frame 9 planting department 10 Lifting link mechanism 11 Top links 12 Lower Link 15 Lifting cylinder 15a Cylinder rod 43 Rear frame 183 shock absorber 184 Extension member 185 Bearing

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Osamu Takeuchi             1-32 Yanma, Chayamachi, Kita-ku, Osaka-shi, Osaka             -Agricultural machinery Co., Ltd. F term (reference) 2B304 KA11 KA17 LA02 LA09 LB05                       LB16 MA02 PD33 PD38 PD39                       RA03 RA13

Claims (3)

[Claims] 1. A riding rice transplanter in which a planting portion is connected to a rear portion of a vehicle body frame of a traveling vehicle through an elevating link mechanism composed of a top link and a lower link, and an elevating cylinder for driving the elevating link mechanism up and down is provided. A shock absorber is provided on the cylinder rod of the lifting cylinder, an extension member is extended rearward from the shock absorber, and a rear end portion of the extension member is provided.
A riding rice transplanter comprising a bearing portion that pivotally supports the front portion of the lower link. 2. The front part of the lifting link mechanism is pivotally supported by a rear frame of an inverted U-shape in rear view at the rear part of the vehicle body frame,
The riding rice transplanter according to claim 1, wherein the extending member is arranged near a lower position inside the rear frame. 3. The riding rice transplanter according to claim 1, wherein the extending direction of the extending member is substantially the same as the extending and contracting direction of the cylinder rod.