JP2002272228A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter with which a seedling longitudinally transporting part for longitudinally transporting seedlings on a seedling placing stand can be favorably installed. SOLUTION: A one-way clutch 118 for seedling longitudinal transportation is laid in the vicinity of a central rib 164 at the back side of the seedling placing stand 16. A seedling longitudinally transporting inverted cam 117 is arranged in the vicinity of a side rib 166 at one side of right and left from the central rib 164. The one-way clutch 118 is connected to the inverted cam 117 through a connection member 168.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter having a seedling mounting table and a seedling mounting claw for continuously performing seedling planting operations.

[0002]

Conventionally, a driven cam and a one-way clutch of a longitudinal feed cam for vertically feeding a seedling on a seedling mounting table are arranged near the center of the seedling mounting table and behind the ribs. Since there is a hitch member or the like connected to the link mechanism at the center rear side position, there is a concern that the maintenance performance of the driven cam and the one-way clutch is extremely poor.

[0003]

Therefore, according to the present invention, a one-way clutch for longitudinally feeding seedlings is interposed in the vicinity of a central rib on the back side of a seedling mounting table, and the seedlings are provided in the vicinity of lateral ribs on one side of the center rib. A vertical feed driven cam is provided, and the one-way clutch and the driven cam are interlocked and connected via a connecting member, so that maintenance and inspection of the driven cam can be easily performed from the side of the planting part, thereby improving maintainability. It is to improve.

In addition, a connecting support member for connecting to the traverse mechanism is disposed near the back side of the rib at a position opposite to the driven cam centering on the center rib, so that the connecting support member can be maintained without adversely affecting the driven cam. Inspection can be easily performed to improve the maintenance, and the workability at the time of assembling or disassembling the seedling mounting table is improved.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a riding rice transplanter, and FIG. 2 is a plan view of the same. In the drawing, reference numeral 1 denotes a traveling vehicle on which an operator rides. The engine 2 is mounted on a body frame 3 and a longitudinal transmission is provided. A paddy traveling front wheel 6 is supported in front of the case 4 via a front axle case 5, and a paddy traveling rear wheel 8 is supported by a rear axle case 7 behind the transmission case 4. A spare seedling mount 10 is mounted on both sides of the hood 9 covering the engine 2 and the like, and the transmission case 4 and the like are covered by a body cover 11 on which an operator rides.
A driver's seat 13 is mounted on the upper surface of the rear driver's cab 12, and a steering handle 1 is provided in front of the driver's seat 13 at the rear of the hood 9.
4 is provided.

In the figure, reference numeral 15 denotes a seedling mounting table 16 for four-row planting.
And a planting section having a plurality of seedling planting claws 17 and the like.
0 and a rotary case 21 that is slidably supported in a reciprocating manner in the left and right directions and is rotated at a constant speed in one direction.
0, and a pair of claw cases 22 are disposed symmetrically about the rotation axis of the case 21. The seedlings 17, 17 are attached to the tips of the claw cases 22. Also, left and right side frames 23 are erected on both left and right sides of the planting frame 20 to support the seedling mounting table 16, and the hitch bracket 24 at the left and right center of the planting frame 20 includes a top link 25 and a lower link 26. A hydraulic lifting cylinder 28 provided on the traveling vehicle 1 is connected to the lower link 26 via the lifting link mechanism 27, and the planting section 15 is raised and lowered via the link mechanism 27 when the lifting cylinder 28 is driven. When the planting section 15 is lowered, the seedlings for one plant are planted from the seedling table 16 which is reciprocally slid left and right.
7 so that the seedlings can be planted continuously.

In the figure, 29 is a main speed change lever, 30 is a seedling connecting lever which enables operations such as stopping running at a position where the aircraft is off the aircraft as well as a boarding position of the aircraft, 31 is a planting elevating lever, 32 Is a main clutch pedal, 33 and 33 are left and right brake pedals, 34 is a center float for leveling two lines, 35 is a side float for leveling one line, 36 is a side fertilizer for 4 lines, and 37 and 37 are rear. These auxiliary wheels are arranged outside the wheel 8.

The side-strip fertilizer applicator 36 includes a fertilizer hopper 38 for receiving fertilizer, a fertilizer feeding case 39 serving as a fertilizer feeding section for feeding fertilizer, and a side-strip groove 4 for floats 34 and 35.
0 is equipped with a turbo blower type blower 42 for discharging fertilizer via a flexible transfer hose 41 and a cylindrical air tank 43, and the blower 42 is attached to the right end of the air tank 43, and four sets of four fertilizer feeding cases are provided. 39 is arranged above the air tank 43, and the upper end of the seedling mounting table 16 is arranged close to the rear side of the fertilizer hopper 38.

As shown in FIG. 3 to FIG. 12, the planting frame 20 is made of a pipe-shaped left and right vertical frame 44a for two lines.
44b and a horizontal pipe frame 45 connecting the front ends of the left and right vertical frames 44a and 44b, and a cruciform frame joint (cross joint) 46 formed by bulging is welded to the tip of each of the vertical frames 44a and 44b. The rotary case 21 is rotatably supported by a joint 46 via a rotary shaft 47, and left and right cruciform frame joints (cross pipe joints) 48a and 48b formed by bulging are connected to the vertical frames 44a and 44b and the horizontal frames. 45, and the vertical and horizontal frames 44a, 44b, and 45 are integrally connected to each other to form the lightweight planting frame 20 at low cost.

A planting input shaft 49 is provided at the front end of the right frame joint 48b.
The driving force from the shaft is transmitted to the input shaft 49 via the universal joint shaft 50, and the input shaft 49 is interlocked via bevel gears 49a and 52 to the planting drive shaft 51 provided in the horizontal frame 45, and the left and right vertical frames are connected. The planting claw drive shaft 53 provided in each of the shafts 44a and 44b is connected to the planting drive shaft 51 via bevel gears 52 and 54 and a safety clutch 55.
7 is connected to a planting claw drive shaft 53 via bevel gears 56a and 56b and a planting claw unit clutch 57, so that the seedling planting claw 17 is driven.

Further, a seedling feed shaft 58 for laterally feeding the seedling mounting table 16 in the left-right direction and vertically feeding the seedlings on the seedling mounting table 16 is connected to a planting drive shaft 5 via a seedling feeding case 59 made of aluminum die cast.
1 and the left frame joint 48
a, the seedling sending case 5
9, one end side flange portion 61 is bolted and fixed, and the left end of the seedling feed shaft 58 is inserted and supported on the other end side of the case 59;
A speed change mechanism 64 formed between the drive shaft 51 and the seedling feed shaft 58 in the case 59 by two sets of switching gears 62 and 63 for shifting the height.
, The left half of the seedling feed shaft 58 is provided on the seedling vertical feed cam shaft 65 and the right half is provided on the seedling stand horizontal feed screw shaft 66 with respect to the approximate center of the machine. It is configured to perform the horizontal feeding of the seedling mounting table 16 and the vertical feeding of the seedlings on the seedling mounting table 16.

As shown in FIGS. 10 and 11, a planting depth adjusting fulcrum shaft 67 is rotatably supported below the front end of the planting frame 20, and brackets on the upper surfaces of the rear ends of the floats 34 and 35 are provided. 68 and 69 are connected to the fulcrum shaft 67 via planting depth adjusting links 70 and 71, and a change in the float inclination angle (planting depth) is detected by an elevating link 72 connected to the front end of the center float 34. , The fulcrum shaft 67
The reference planting depth is configured to be adjusted by a planting depth adjusting lever 73 having a base end fixed thereto.

At the left and right ends of the fulcrum shaft 67, L-shaped left and right side bumpers 74 are protruded outward so as to be freely foldable via a mounting member 75.

As shown in FIGS. 8, 10 and 11, the base ends of the left and right marker support stays 77 for supporting the left and right muscle pulling markers 76 so that they can be folded (undulated) are connected to the left and right frame joints 48a.
48b is fixed by welding to the outer upper surface of 48b.
Is formed by an L-shaped pipe, and the longitudinal stay portion 77a in the front-rear direction is fixed by welding to the substantially same height surface in the longitudinal direction at substantially the center of the joints 48a and 48b by line contact, and the horizontal stay portion 77b is
4a and 44b, the left and right sides of the front stay 7
The marker 76 is attached to the mounting shaft 78 at the tip of the
And the side stay 77b of the left stay 77 is positioned in front of the seedling feed case 59 to protect the case 59.

As shown in FIG. 13, the support stay 77 is connected to the base 48 of the left and right side frames 23 by a joint 48.
The base ends of the vertical stay portions 77a are also fixed by welding to the inner surfaces of the left and right reinforcing members 80 and 81 attached to the side a and 48b, so that the support strength of the side frame 23 and the stay 77 is improved.

As shown in FIG. 14, a seedling removing plate 82 at the lower end of the seedling table 16 is moved up and down to adjust the amount of seedling harvested, and a guide rod 85 is attached to a guide member 84 of the planting frame 20. An engaging plate 87 which is supported vertically so as to be able to move up and down via a hook 86 of the adjusting plate 83 is provided on the seedling collecting amount adjusting shaft 88 in the left-right direction, and is connected to the left end side of the seedling collecting amount adjusting shaft 88. By operating the amount adjusting lever 89, the claw 17 with the seedling
The right and left ends of the horizontal shaft portion 88a of the seedling collecting amount adjusting shaft 88 are turned around the bearing plate 90 fixed to the seedling sending case 59 and the right reinforcing member 81. It is movably supported, and a horizontal shaft portion 88a is provided outside the seedling feeding case 59.
Is bent forward by approximately 90 degrees to form a longitudinal axis portion 88b in the front-rear direction.
b is bent inward at approximately 90 degrees inward, and the lever mounting portion 8 is bent.
8c, the base end of the L-shaped adjusting lever 89 is fixed to the mounting portion 88c with two bolts 91, and the distal end of the lever 89 is extended obliquely upward and forward through a lever guide 92 to form the left rear wheel 8c. And the auxiliary wheels 37 so as to surround and protect the seedling feeding case 59 with the respective portions 88a, 88b and 88c.
3, the transfer hose 41 is positioned.

The hitch bracket 24 is connected to the upper and lower link shafts 9 for connecting the top link 25 and the lower link 26.
4. A fulcrum member 96 having a mounting member 95 that is held and fixed by welding to substantially the center of the lateral frame 45 of the planting frame 20 by the bracket 2
4 is rotatably connected via a rolling fulcrum shaft 97 via a rolling fulcrum shaft 97, a hydraulic rolling cylinder 99 is mounted on a mounting seat 98 at the upper end of the bracket 24, and the tip of the piston rod 100 of the cylinder 99 is fixed to the fixed bracket 101 at the upper end of the right side frame 23. And a gear pump 102 for reciprocatingly driving the double-acting cylinder 99, a reversible electric motor 103 for driving the pump 102 in the forward and reverse directions, and an oil tank 104 are integrally provided in the cylinder 99. A pendulum type provided on the sensor table 107 of the horizontal frame 45 on the left side of the hitch bracket 24 by extending a rolling correction spring 106 between the receiving plate 105 fixed on the upper surface and the brackets 106a on the left and right ends on the back side surface of the seedling mounting table 16. When the rolling sensor 108 detects the inclination of the planting section 15, the piston rod 100 of the cylinder 99 is The planting unit 15 retreat control to the fulcrum shaft 97 about is swung to the left and right are configured to achieve leveling of the planting unit 15.

The horizontal frame 45 and the fulcrum member 96
A bracket 109 to be welded and fixed to the right end is provided, and the bracket 109 and the bracket 101 at the upper end of the right side frame 23 are reinforced and connected by an oblique stay 110 to improve rigidity of the right side frame 23 with the lightest structure. Thus, the rolling performance is ensured.

Further, the bracket 109 rotatably supports substantially the middle of the seedling feed shaft 58. The lateral feed screw shaft is provided between the bearing plate 111 fixed to the right support stay 77 and the bracket 109 via a bearing 112. 66, the right end of the vertical feed cam shaft 65 is connected to the left end of the screw shaft 66 via a joint 113, and the left end is connected to and supported by the seedling feed case 59. The screw shaft 66 has a double-supported structure to improve the support strength, and the right end of the vertical feed cam shaft 65 is connected to the screw shaft 66 with the same axis to improve the vertical feed accuracy. The camshaft 65 is an iron hollow pipe,
The screw shaft 66 is formed of a solid iron material, and the seedling feed case 59 and the cam shaft 65 are distributed to the left side of the center of the machine body, and the heavy screw shaft 66 is distributed to the right side to improve the balance between the left and right. It is provided as follows.

A slider 114 is screwed to the screw shaft 66, and a slider 114 is connected to the seedling mounting table 16 via a slider holder 115 so that the seedling can be mounted when the screw shaft 66 rotates in one direction. The table 16 is reciprocated right and left, and the vertical feed cam shaft 65 has a left and right vertical feed cam 116. When the seedling mounting table 16 moves to the left and right moving end, the driven cam 11
7 and the one-way clutch 118
A pair of upper and lower roller shafts 119.1 provided on the lower end side of the seedling mounting table 16 by rotating the vertical feed roller shaft 119 in one direction through
The vertical feed belt 123 wound between the 20 vertical feed rollers 121 and 122 is moved in the lower end direction by one seedling.

As shown in FIGS. 15 to 17, the frame joint 48a for connecting the seedling feed case 59 is provided with a flange portion 60 for mounting and fixing the seedling feed case 59 at one end of the frame joint 48a. A spigot fitting portion 124 that fits into the outer end of the frame joint 48a that protrudes by a certain length is provided on the inner surface of one side of the seedling feeding case 59, and a tapered surface 125 is formed at the outer end of the fitting portion 124. The O-ring 126 is connected to the tapered surface 125 and the joint 48a.
The bolt 127 of the flange portions 60 and 61 is interposed between them.
At the time of fixing, the airtightness between the joint 48a and the case 59 is maintained by a simple and low-cost means.

The seedling feed case 59 includes a planting drive shaft 51.
A separate transmission shaft 128 is provided, and a spline hole 129 is formed inside the bevel gear 52, and the left end of the drive shaft 51 and the right end of the transmission shaft 128 are fitted into the spline hole 129 to change the speed to the drive shaft 51. The shaft 128 is integrally connected so that when the seedling feed case 59 is detached, the transmission shaft 128 can also be detached integrally and easily.

A bearing 130 is provided between the joint 48a and the bevel gear 52, and the bevel gear 52 is rotatably supported at one end of the joint 48a.
The flange portion 60 is provided on the outer surface of the joint 48a at the outer end from the position 30
Are fixed by welding, and the joint 4 of the bearing 130 is fitted.
The inner diameter b of the inner peripheral surface of the joint 48a for welding the flange portion 60 is larger (a <b) than the inner diameter a of the fitting surface 8a. The assembly 130 is configured so as not to adversely affect the assembly.

Further, the seedling feeding case 59 is formed in an L shape having a vertical case portion 59a and a horizontal case portion 59b, a flange portion 61 is formed at the right end of the horizontal case portion 59b, and a switching gear is formed on the vertical case portion 59a. The speed change mechanism 64 formed by the speed change switching mechanism 13
The switching gears 62 and 63 are provided with a transmission shaft 1.
Drive gears 62a and 63a idlely supported by the gear 28 and driven gears 62b and 6 coupled and fixed to the left end of the vertical feed cam shaft 65.
3b, and the switching mechanism 131 includes the transmission shaft 1
28 is embedded in the key groove 132 and the tip is seat spring 13
A shift key 135 for selectively engaging the key grooves 134 of the gears 62a and 63a with three forces, and a switching lever 138 connected to the shift key 135 via a shift ring 136 and a shifter 137; The operation section 138a is configured to protrude to the front outside on the left side of the seedling feed case 59, and to switch between the high-low and second-high lateral feed speeds by pushing and pulling the switching lever 138 in the left-right direction.

The switching gears 62 and 63 are connected to the shift 1
The gears 62a and 63a on the side engaged with the gear 35 are formed of a metal material such as iron, and the gears 62b and 63b on the other side are formed of a resin material so as to improve both weight reduction and durability. I have.

As shown in FIGS. 18 and 19, the planting frame 20 has the bevel gears 49a, 52 and 54 compactly incorporated in the front frame joints 48a and 48b and the compact frame frame 46 in the rear frame joint 46. The bevel gears 56a and 56b and the planting claw unit clutch 57 are incorporated to simplify the structure and reduce the cost. The planting claw unit clutch 57 is fixed to a bevel gear 56b that idles and supports the rotating shaft 47. The part 139 to the rotating shaft 4
Sliding body 140 to be spline-fitted slidably to left and right to 7
The clutch operation for forming the movable clutch portions 141 respectively and pressing the sliding member 140 by the clutch spring 142 to connect (turn on) the clutch portions 139 and 141 at all times and to retract the sliding member 140 against the force of the spring 142. The member 143 is provided at the frame joint 46 so as to be able to advance and retreat, and the operating member 143 is connected to the unit clutch lever on the back side of the seedling mounting table 16 via the lever 144 and the like, and the operation of the clutch lever causes the engagement and disengagement of the planting claw unit clutch 57. It is configured to perform.

As shown in FIGS. 20 (1) and (2), the side bumper 74 is vertically inserted through a bent vertical portion 74a of a bumper bending vertical portion 74a into a U-shaped mounting member 75 fixed to both ends of a fulcrum shaft 67. Between the spring member 145 of the vertical portion 74 a projecting downward from the mounting member 75 and the mounting member 75.
The L-shaped position regulating plate 147 which is provided between the vertical portion 74 and the left end surface and the front surface of the mounting member 75 is provided.
a, and a stopper 148 is provided on the mounting member 75 to prevent the regulating plate 147 from rotating backward.
The horizontal position of the bumper 7 is at the contact position between the mounting member 75 and the left end face.
4b is made to protrude in the direction of extension of the fulcrum shaft 67 to protect the seedling extraction plate 82 and the like.
4 is lifted upward, the horizontal portion 74b is rotated forward by approximately 90 degrees, and the width of the body is reduced at the bumper storage position where the restricting plate 147 and the front surface of the mounting member 75 are brought into contact with each other, so that the loading and storage of the vehicle can be performed. It is configured to make it possible easily.

By the way, the inside of the seedling feed case 59 is constituted by two shafts 65 and 128, and two sets of switching gears 62 and 63, a simple transmission mechanism 64 of the shift key 135 and a switching mechanism 13 are provided.
1 to reduce the cost of the mold and reduce the cost and size and weight. At the same time, remove the case cover 150 on the left side, which is fixed to the case body via bolts 149, to replace and inspect the gears 62 and 63. For example, it is possible to easily perform the maintenance and improve the maintainability.

Further, the horizontal case portion 59b has a long shape,
When the distance between the vertical case portion 59a and the flange portion 61 is increased to use tools for attaching and detaching the bolts 127, the tools are easily inserted to the bolt 127 position and the case 59 Good attachment / detachment work can be made possible.

As described above, the planting portion 15 is formed by forming the planting frame 20 with a pipe frame so as to simplify the structure and reduce the weight. A marker support member 77 that is a marker support stay that foldably supports the left and right muscle pulling markers 76,
By fixing the rear end of the marker support stay 77 to the planting frame 20 and bending the front end side outward of the body, the marker 76 stays in place each time the planting depth is adjusted as in the related art.
Without changing the support angle of the marker 76 and without causing the marker 76 to abut on the seedling mounting table 16 or the fertilizing device 36 which is a fertilizing unit provided in the machine, even when the marker 76 is stored.
The marker 76 is compactly incorporated into the planting section 15 to shorten the longitudinal length of the body, to improve the longitudinal balance of the body, and to make the storage posture of the marker 76 a more upright posture than before. To prevent the mud adhering to 76 from scattering to the worker side, and to change the bending position of the marker support stay 77 as necessary to share the used parts such as the planting frame 20 and to expand to other models and other specifications. And the cost can be reduced.

A seedling frame 20 for driving the seedling mounting claw 17, a seedling feed case 59 disposed on one side of the planting frame 20 to drive the seedling feed shaft 58, Seedling amount adjusting shaft 8 which is a seedling amount adjusting member for adjusting the seedling amount.
8, the tip of the seedling feed adjusting shaft 88 is projected forward from the rear of the seedling feed case 59 so as to detour from the side, and the outside of the seedling feed case 59 is moved by the seedling feed adjusting shaft 88. It protects and improves the durability of the seedling feeding case 59, and enables the good support without damaging the hose 41 by utilizing the seedling collection adjusting shaft 88 as a guide member of the fertilizing hose 41 when the fertilizing part 36 is attached. Can be done.

Further, a seedling collection adjusting lever 89, which is a seedling collection adjusting operation member for adjusting the seedling collection of the seedling mounting table 16, is provided on the side of the planting portion 15, and is provided outside the rear wheel and on the body. By projecting the operating portion of the adjusting lever 89 forward, the amount of twisting of the operator's body from the driver's seat position is suppressed as small as possible, and the operability of the seedling collecting amount adjusting lever 89 is improved. The arrangement can be simplified, for example, by increasing the degree of freedom of the rotation angle of the take-up adjustment lever 89.

Further, by arranging a seedling collection adjusting lever 89 between the rear wheel 8 and the auxiliary wheel 37 on the outside thereof, the limited space between the rear wheel 8 and the auxiliary wheel 37 is effectively used to obtain the seedling collection. The adjustment lever 89 is provided, so that compact incorporation into the planting portion 15 can be easily performed.

Further, a seedling collecting amount adjusting lever 89 is provided on one side of the rear wheel 8 and a planting depth adjusting lever 73 which is a planting depth adjusting operation member for adjusting the planting depth to the other side across the rear wheel 8. By disposing the levers 73 and 89, which need to be operated during the work, can be arranged close to the same side of the center of the machine body to improve their operability.

The seedling feed shaft 58 has a longitudinal feed cam shaft 65 at one end and a lateral feed screw shaft 66 at the other end, and the cam shaft 65 and the screw shaft 66 are distributed right and left from the center of the machine body. By doing so, the right and left weight balance of the planting section 15 is improved to stably maintain the seedling planting accuracy, and the vertical feed cam 116 of the vertical feed cam shaft 65 and the slider 114 of the horizontal feed screw shaft 16 are attached to the machine body. The maintenance can be facilitated by distributing from the center to the left and right.

Further, both ends of the lateral feed screw shaft 66 are connected and supported by the planting frame 20, and both ends of the vertical feed cam shaft 65 are supported by the screw shaft 66 and the seedling feed case 59. And the lateral feed screw shaft 66 are accurately supported by the planting frame 20 and the vertical feed cam shaft 6
By supporting the seedling 5 on the seedling feed case 59 and the screw shaft 66 in a double-supported manner, it is possible to improve the lateral feeding of the seedling mounting table 16 and the vertical feeding accuracy of the seedling.

The seedling feeding case 59 is connected to the planting frame 2.
0 and a vertical case portion 59a and a vertical case portion 59a are formed in a substantially L-shaped structure, and a vertical feed cam shaft 65 extends inward from the vertical case portion 59a. The vertical feed cam 116 faces the substantially U-shaped space formed by the camshaft 65 and the camshaft 65 to reduce the lateral space width of the seedling feed case 59 and the vertical feed cam portion, and to compactly integrate them. The degree of freedom in installing and designing other components can be increased.

As shown in FIG. 21, a rolling control unit 151 is composed of the rolling cylinder 99, the gear pump 102, the electric motor 103, the oil tank 104, etc., and the hitch bracket 24 and the right side frame 23 The control unit 151 is tilted in a forward-downward (forward-tilting) posture, and is disposed on the rear side of the seedling table 16 substantially along the front-back inclination (approximately 57 degrees) of the seedling table 16. , Top link 2 in side view
The swing range of 5 and the unit 151 are provided so as to be wrapped, and the unit is compactly assembled between the machine and the planting portion 15 to reduce the overall length of the machine. In addition, a rolling bracket 152 is provided between the lower left end of the control unit 151 and the mounting seat 98.
Is a gate-shaped main body 154 fixed to the lower left end of the unit 151 with bolts 153;
And a gate-shaped mounting portion 156 that is connected to the main body 154 so as to be swingable up and down, and the mounting portion 156 is fixed to the main body portion 154 by changing the angle of the forward and downward inclination, and the hitch bracket 152 is formed.
The unit 151 is connected in a forward-downward posture, and the pivot shaft 155 is provided at a position closest to the hitch bracket 152 and offset from the link shaft 94 serving as the pivot point of the top link 25, and The configuration is such that rigidity is improved and interference with the top link 25 is avoided, so that the unit 151 can be compactly assembled and performance can be improved.

As shown in FIG. 22, a heavy object such as a planting depth adjusting lever 73, a seedling collecting amount adjusting lever 89 and their related accessories are arranged on the left side of the hitch bracket 24 around the fulcrum shaft 97. The balance with the rolling control unit 151 disposed on the right side of the bracket 24 is substantially balanced, and the center of gravity of the planting portion 15 is also located substantially near the center. The plate 157 is linked to a speed-tuned planting depth correction motor 160 via a screw coupling body 158 and a screw shaft 159 to perform manual reference adjustment of the planting depth and to use the correction motor 160 when the running speed changes. Thus, it is configured to automatically perform the reference correction of the planting depth.

The U-shaped left and right frames 26a at the rear end of the lower link 26 are integrally connected by a reinforcing pipe 161 to improve rigidity, and a triangular lower portion is provided substantially at the middle of the front side surface of the hitch bracket 24. Dynamic stopper member 1
When the planting part 15 moves downward more than necessary, the stopper member 162 is brought into contact with the reinforcing pipe 161 to restrict further downward movement of the planting part 15 so that the planting part 15 moves downward.
Is configured to prevent inconvenience such as breakage.

As shown in FIGS. 23 to 26, the boss 165 of the one-way clutch 118 is arranged behind the central rib 164 (the rib between the second and third rows from the left side of the seedling mounting table 16) of the seedling mounting table 16. At the same time, the driven cam 117 and the cam supporting boss 167 are disposed behind the left rib 166 (the rib between the first and second rows from the left side of the seedling mounting table 16) adjacent to the left side of the center rib 164.・ 167
The link is interlockingly connected by the connecting member 168, and after the longitudinal feed, the cam 1
17 is returned to the original position.
The one-way clutch 118 on the back side of the center rib 164 is operated by a driven cam 117 provided on the back side of the left rib 166, interposed between the cam stopper 170 (shown in FIG. 14) on the back side of the fourth rib 168 and the connecting member 168. The longitudinal feed roller shaft 119 is rotated in one direction via a 171 / longitudinal feed transmission shaft 172 / longitudinal feed unit clutch 173 to vertically feed the seedlings.

A seedling arm 175 is fixed to the back of the right rib 174 of the first and second rows from the right side of the seedling mounting table 16, and the seedling arm 175 is engaged with the slider holder 115 via a bolt 115 a. The seedling stand 16 is traversed in the left-right direction by being connected together. The seedling arm 175 is arranged at a symmetrical position of the driven cam 117 with respect to the center line of the center of the seedling stand 16. Space for the seedling stand arm 175 and the seedling stand 1
6. The driven cam 117 which is not affected by the seedling stand arm 175 while improving the workability at the time of assembling and disassembling.
It is configured to facilitate maintenance and maintain stable cam performance.

As shown in FIG. 27, the left and right two-unit clutch levers 176.1 are provided on the upper rear side of the seedling mounting table 16.
76, the left and right ribs 166 and 174
A lever guide body 177 is fixedly mounted at an upper position on the rear side, and the cover body 177 supports a clutch lever 176 via a lever shaft 178 so as to be rotatable in the left-right direction. One end is connected to a fertilizer unit clutch that turns on and off the drive of the clutch 57 and the fertilizer feeding case 39 of the fertilizer applicator 36. Each longitudinal feed, planting claw, and each clutch wire 179/180 for fertilizer application.
The other end of the clutch lever 181 is connected to the clutch lever 176, and the left or right two-row vertical feed and the planting pawl 1 are operated by the disengagement of one of the left and right unit clutch levers 176.
7 and the drive of the fertilizer applicator 36 are stopped.

The vertical feed unit clutch 173
Is provided between the longitudinal feed roller shaft 119 and the transmission shaft 172 inserted into the roller shaft 119 at both left and right positions of the seedling mounting table 16.
A fixed claw clutch 182 is provided on the small-diameter shaft portion 172a of FIG. 2, and a movable claw clutch 183 is fitted to the outer periphery of the hexagonal roller shaft 119 so as to be slidable left and right. Clutch 182
Side, the pawl clutches 182 and 183 are engaged to engage the unit clutch 173, while the fork 185 is rocked by the left and right rocking operation of the clutch lever 176 to push the movable pawl clutch 183 against the spring 184. When retracting, the pawl clutches 182 and 183 are disengaged and the unit clutch 173 is disengaged.

Further, a clutch wire 179 connecting the left and right unit clutch levers 176 and the left and right forks 185 extends along the left and right outermost ribs 187 of the seedling mounting table 16 and a crank member on the upper side of the rib 187. 18
8 and on the lower side of the rib 187, the outer receiving member 18
9, the clutch wire 179 is supported to prevent the clutch wire 179 from being hooked or damaged.

Further, a seedling detecting sensor 190 for detecting the presence or absence of a seedling is provided at the center of each strip below the seedling mounting table 16. The sensor 190 is provided with a seedling detection switch 192 that is brought into contact with the cam 191, and the detection cam 191 swings depending on the presence or absence of a seedling, and the detection switch 192 is turned on / off to detect a seedling connection time.

The seedling splicing sensor 190 is disposed between the left and right vertical feed belts 123 of each row of the seedling mounting table 16, and the harness 193 of the switch 192 of each row is connected to the planting depth adjusting lever 73.
In addition, the harness 193 for four rows is extended to the right end of the seedling table 16 on the side opposite to the side where the seedling collecting amount adjusting lever 89 is installed.
Into a harness guide 194 fixed to the right end of the guide rail 19 and connected to a harness 196 of the controller on the main unit side via a coupler 195.
The harness 193 includes the hitch bracket 24 and each lever 73.
-It is configured to prevent hindrance of the 89 and to easily check the harness connection from the right outside of the fuselage, thereby improving maintainability.

When electric parts such as a flasher lamp and a unit clutch sensor other than the seedling connection sensor 190 are provided on the seedling mounting table 16, the harnesses of these electric parts are collectively supported by the harness guide 194, and are placed on the machine side. It is to connect.

The conventional unit clutch lever 176
Clutch wires 180 and 17 for the planting claw unit clutch 57 and the vertical feed unit clutch 173 connected to the
9 is connected to each of the clutches 57 and 173 by another route, there is a possibility that the clutch wires 180 and 179 may be damaged by hooking on the components of the planting portion 15 such as the adjusting levers 73 and 89 and the hitch bracket 24. There is,
By supporting these clutch wires 180 and 179 by the clamp members 188 on the left and right sides of the seedling mounting table 16, it is possible to dispose the clutch wires 180 and 179 without contacting the components of the planting portion 15. Thus, the performance of each of the clutches 57 and 173 can be stably maintained.

Further, the extension seedling stand 197 extending above the seedling stand 16 is formed to have a length equal to or more than 1/2 of the length of the seedling mat placed on the seedling stand 16, so that it can be shared by various models. It is configured to be.

As is apparent from the above description, the one-way clutch 118 for vertically feeding the seedlings is interposed in the vicinity of the center rib 164 on the back side of the seedling mounting table 16 and the side ribs 166 on the left and right sides of the center rib 164. The one-way clutch 118 and the driven cam 117 are connected to each other via a connecting member 168 so that maintenance and inspection of the driven cam 117 can be performed from the side of the planting portion 15. It is possible to make it easier and maintainability can be improved.

A seedling arm 175 is provided near the rear side of the rib 174 at a position opposite to the driven cam 117 with the center rib 164 as a center. As a result, the driven cam 11
The maintenance of the seedling stand arm 175 can be easily performed without adversely affecting the seedling stand 7, thereby improving the maintainability and improving the workability when assembling or disassembling the seedling mounting table 16.

Also, harnesses 193 of various electric components to be arranged on the back side of the seedling mounting table 16 are extended to one side of the seedling mounting table 16 on the left and right sides.
6, the harness 193 of various electrical components is securely connected to the machine side harness 196 without causing erroneous assembling on one side of the seedling mounting table 16, thereby improving maintainability. be able to.

Further, a seedling collecting amount adjusting lever 89 for adjusting the amount of seedlings taken out from the seedling mounting table 16 and a planting depth adjusting lever 73 for adjusting the planting depth of the seedlings are provided on one side of the planting section 15 on the left and right sides. And the extension of the harness 193 to the other side, so as not to hinder the operation of the seedling collection and planting depth adjusting levers 89 and 73, and without damaging them by these operations. The harness 193 can be satisfactorily arranged to stably maintain the performance of various electrical components.

[0055]

As is apparent from the above embodiment, the present invention has a one-way clutch 118 for longitudinally feeding seedlings in the vicinity of the center rib 164 on the back side of the seedling mounting table 16, and one side from the center rib 164 to the left and right. Is disposed in the vicinity of the side rib 166 and the one-way clutch 118 and the driven cam 117 are interlocked and connected via the connecting member 168. Therefore, maintenance and inspection of the driven cam 117 and the like are performed. The maintenance can be improved by making it easier than the side of the planting portion 15.

Further, since the connection support member 175 to the transverse feed mechanism 66 is disposed near the back side of the rib 174 at a position opposite to the driven cam 117 about the center rib 164, the driven cam 117 is adversely affected. This makes it possible to easily perform maintenance and inspection of the connection support member 175 without providing the same, thereby improving the maintainability and improving the workability when assembling and disassembling the seedling mounting table 16.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is an overall plan view of the rice transplanter.

FIG. 3 is a side view of the planting section.

FIG. 4 is a plan view of a planting section.

FIG. 5 is an explanatory plan view of a planting section.

FIG. 6 is a schematic front view of a planting section.

FIG. 7 is a front view of the planting frame portion.

FIG. 8 is a side view of the planting frame portion.

FIG. 9 is a plan sectional view of the planting frame portion.

FIG. 10 is a left side plan view of the planting frame.

FIG. 11 is a right side plan view of the planting frame.

FIG. 12 is an explanatory sectional view of a planting frame.

FIG. 13 is an explanatory perspective view of a planting frame.

FIG. 14 is an explanatory view of a seedling removal unit.

FIG. 15 is an explanatory sectional view of a seedling sending case portion.

FIG. 16 is an explanatory diagram of a transmission shaft unit.

FIG. 17 is an explanatory diagram of a switching mechanism.

FIG. 18 is an explanatory diagram of a planting claw unit clutch unit.

FIG. 19 is an explanatory view of the appearance of a planting claw unit clutch unit.

FIG. 20 is an explanatory diagram of a side bumper unit.

FIG. 21 is an explanatory side view of a rolling control unit.

FIG. 22 is an explanatory front view of the hitch bracket.

FIG. 23 is an explanatory rear view of the seedling mounting table.

FIG. 24 is an explanatory view of a seedling table vertical feed section.

FIG. 25 is an explanatory side view of the seedling mounting table.

FIG. 26 is an explanatory diagram of connection between a one-way clutch and a driven cam.

FIG. 27 is an explanatory diagram of a unit clutch lever.

[Explanation of symbols]

 16 Nursery stand 66 Lateral feed screw shaft (lateral feed mechanism) 117 Follower cam 118 One-way clutch 164 Rib 166 Rib 168 Connecting member 174 Rib 175 Nursery stand arm (Connecting support member)

Claims (2)

[Claims] A one-way clutch for seedling vertical feeding is provided near a center rib on the back side of a seedling mounting table, and a seedling vertical feeding driven cam is provided near side ribs on the left and right sides of the center rib.
A rice transplanter wherein a one-way clutch and a driven cam are interlockedly connected via a connecting member. 2. The rice transplanter according to claim 1, wherein a connection support member for connecting to a transverse feed mechanism is disposed near the back side of the rib at a position opposite to the driven cam centering on the center rib.