JP2002262621A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter allowing for a small-sized and lightweight seedling feed case functioning to change the seedling feed speed for a seedling stand. SOLUTION: This rice transplanter includes a planting frame 20 for driving a seedling planting tine 17 and a seedling feed case 59 set up on left or right one side of the planting frame 20 and functioning to drive a seedling feed shaft 58, wherein the seedling feed case is formed in an approximately L-shaped fashion through being composed of a longitudinal case part 59a linked to the seedling feed shaft 58 and a transverse case part 59b linked to the planting frame 20, and a variable-speed mechanism 64 for seedling feed is set on the longitudinal case part 59a, while a changeover mechanism 131 for the variable- speed mechanism 64 on the transverse case part 59b.

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, for example, Japanese Utility Model Registration No. 2548430 and Japanese Patent Application Laid-Open No. 2000-4142.
Japanese Patent Application Laid-Open No. 9-29904 discloses a means for transmitting the rotation of the planting drive shaft in the planting frame to the transverse feed shaft via the transverse feed case to transversely move the seedling mounting table. In this case, it can be changed only by changing the gears in the traverse case, which is troublesome. Since it remains, it is troublesome to remove the gear and shaft each time.

In addition, a transverse feed mechanism comprising a plurality of sets of switching gears is provided in a planting drive case for inputting a PTO drive force from the machine, and a shift output from the shift mechanism is transmitted to a transverse feed shaft. There is also a means for changing the traverse speed, but the weight is increased and the cost is increased due to the complicated structure and the large size of the case.

Further, when a plurality of shift gears are provided in a lateral feed case and both gears are made of resin, the friction becomes large and the gears rotate smoothly. There is a concern that it cannot be done. When a shifter is used as the switching mechanism of the switching gear, the strength of the gear on which the shifter acts is insufficient if the gear is made of resin, and when securing a certain strength or more, the thickness of the gear is increased so that the case becomes larger. There are concerns.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention comprises a planting frame for driving a planting claw and a seedling feed case disposed on one of the left and right sides of the planting frame for driving a seedling feed shaft. The seedling feed case is formed in a substantially L-shape with a horizontal case portion connected to the planting frame and a vertical case portion connected to the horizontal feed shaft, and a transmission mechanism for shifting the seedling feed speed is provided in the vertical case portion. The switching mechanism for switching the seedlings is provided in the horizontal case section, and the small-sized, low-cost side-feeding case makes it easy to change the seedling feed speed. In addition to increasing the degree of freedom in installing parts, the case where the transmission mechanism and the switching mechanism are left in the seedling feeding case can be easily removed, thereby improving maintainability of the transmission mechanism and the switching mechanism. .

Further, the transmission mechanism is formed by a plurality of sets of switching gears, the gear operated by the switching mechanism is formed of metal and the mating gear is formed of resin, and the friction is reduced by a combination of metal and resin gears. Suppresses smooth rotation and weight reduction, eliminates insufficient strength on the gear side when a shifter is used for the switching mechanism, keeps the gear shape small, and prevents the seedling sending case from becoming large. Is what you do.

[0007]

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 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 transmission lever, 30 is a seedling connecting lever that 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 putting in fertilizer, a fertilizer feeding case 39 which is a fertilizer feeding section for feeding fertilizer, and a side-strip forming device 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 rows.
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 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 mounting table 16 is moved up and down to adjust the amount of seedling harvested. 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 rolling correction spring 106 is stretched between the receiving plate 105 fixed on the upper surface and the left and right brackets on the back side surface of the seedling mounting table 16, and the sensor base 10 of the horizontal frame 45 on the left side of the hitch bracket 24 is extended.
7, the pendulum-type rolling sensor 108 is attached to the planting portion 15.
When the inclination is detected, the piston rod 100 of the cylinder 99 is controlled to advance and retreat, and the planting portion 15 is swung right and left around the fulcrum shaft 97 to maintain the planting portion 15 horizontally.

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 a substantially middle portion 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 screw-connected 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 feeding case 59 is provided with a flange portion 60 for mounting and fixing the seedling feeding case 59 on one end side 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 a unit clutch lever (not shown) on the back side of the seedling mounting table 16 via a lever 144 or the like.
The planting claw unit clutch 57 is configured to be turned on and off by operating the clutch lever.

As shown in FIGS. 20 (1) and 20 (2), the side bumper 74 is inserted vertically into a bumper bent vertical portion 74a through a U-shaped mounting member 75 fixed to both ends of a fulcrum shaft 67 in a side view. The compression spring 1 is disposed between the mounting member 75 and the spring seat 145 of the vertical portion 74 a projecting below 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 feeding case 59 is composed of 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.

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 section 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.

Also, the longitudinal line contact portions of the marker support stays 77 are fixed by welding to the outer surfaces of the frame joints 48a and 48b for connecting and fixing the planting frame 20, so that the outer surfaces of the frame joints 48a and 48b are fixed. By maintaining the marker support stay 77 with high strength, the durability of the marker 76 can be improved.

Further, the side frame 23 supporting the seedling mounting table 16 and the reinforcing members 80 of the frame joints 48a and 48b are provided.
-By fixing the marker support stay 77 to 81, the marker support stay 77 is firmly fixed to the frame joints 48a and 48b without providing a special reinforcing member for the marker support member, and is lightweight and low cost. By such means, the strength of the marker support stay 77 can be improved.

A planting frame 20 for driving the seedling placement claw 17, a seedling feed case 59 disposed on one side of the planting frame 20 to drive the seedling feed shaft 58, And a marker support stay 77 that folds the marker support stay 77 freely.
0, the front end side is bent outward of the fuselage, and the horizontal stay portion 7 which is a bent portion of the marker support stay 77 is formed.
By arranging the marker 7b in front of the seedling feeding case 59, the supporting angle of the marker 76 does not change every time the planting depth is adjusted as in the related art. Without the inconvenience of bringing the marker 76 into contact with the fertilizer application device 36 mounted on the machine, the marker 76 is compactly incorporated into the planting section 15 to shorten the fore-and-aft length of the machine, thereby improving the fore-and-aft balance of the machine and improving the The storage posture is made to be an upright posture as compared with the conventional case, so that mud adhering to the marker 76 is prevented from scattering to the operator side during the marker storage operation, and the planting frame is appropriately changed by changing the bending position of the marker support stay 77. For example, it can be developed to other models and other specifications that use the same parts as it is used to reduce costs. In addition, the front of the seedling feeding case 59 is protected by the marker support stay 77 and the seedling is sent. To prevent damage to the over scan 59 can be improved durability.

Further, a fulcrum shaft 6 serving as a float support member
By disposing a seedling sending case 59 between a side bumper 74 which is a protection member provided on one end side of the marker 7 and the marker support stay 77, the bumper 74 and the marker support stay 7 are provided.
7 protects the seedling feed case 59 from the front and rear, enables the seedling feed case 59 to be installed properly without damage, and provides a seedling feed case 59 with a switching lever 138 for switching the lateral feed speed. Can eliminate the concern that foreign matter is caught on the switching lever 138 and prevent erroneous operation of the switching lever 138.

Also, the planting frame 20 for driving the planting claws 17, the frame joints 48 a and 48 b for connecting and fixing the planting frame 20, and the seedling feed shaft 58 for feeding the seedlings horizontally and vertically are driven. A seedling feed case 59 is provided, and a flange portion 60 for mounting and fixing the seedling feed case 59 is provided at one end of the frame joint 48a, and a spigot fitting portion fitted to the outer end of the frame joint 48a projected from the flange portion 60. By providing the seedling feeding case 59 on one side inner surface, the seedling feeding case 59 is integrally formed while the switching gears 62 and 63 for laterally shifting and the switching mechanism 131 are left in the seedling feeding case 59. The seedling sending case 59 is easily attached and detached to the planting portion side.
And the maintenance of the transverse feed mechanism 64 such as the switching gears 62 and 63 and the switching mechanism 131 can be improved.

Further, the bearing 1 as a bearing member for supporting the drive shaft 51 as the drive member in the planting frame 20.
30 is provided on the inner surface on one end side of the frame joint 48a, the flange portion 60 is fixed to the frame joint 48a at the outer end from the bearing 130, and the inner diameter of the frame joint 48a is provided larger on the flange portion 60 position side than the bearing 130 position. When the flange portion 60 is fixed to the frame joint 48a by welding, the welding of the frame joint 4
The bearing 130 is mounted with high accuracy without causing any trouble in the mounting of the bearing 130 even if the portion 8a is slightly deformed.

Further, a tapered surface 125 which is a tapered portion is formed on the inner surface of the flange portion 61 of the seedling sending case 59 fixed to the flange portion 60, and the flange portion 60 (joint 48) is formed.
a) and an O-ring 126 interposed between the tapered surface 125 and
Compared to conventional oil seals and other materials used, the structure is simplified and the cost is reduced.
Even if a is deformed, airtightness is ensured without any additional processing, and the tapered surface 125 and the reaction force of the O-ring 126 facilitate the accurate positioning of the seedling feeding case 59.

The planting frame 20 for driving the planting claws 17 and the seedling sending case 59 arranged on one side of the planting frame 20 to drive the seedling sending shaft 58 are provided. 59 is a horizontal case part 5 connected to the planting frame 20
9b and a vertical case portion 59a connected to the seedling feed shaft 58, which is formed in a substantially L-shape, and a transmission mechanism 64 for shifting the lateral feed speed.
By providing the vertical case portion 59a and the switching mechanism 131 for switching the speed change mechanism 64 in the horizontal case portion 59b, the lateral feeding speed of the seedling mounting table 16 can be easily changed by the seedling feeding case 59 provided at a low cost and small size. Thus, the space around the seedling sending case 59 is ensured well, the degree of freedom in design and installation of accessory parts is increased, and the seedling sending case 5 is provided.
It is possible to easily remove the case 59 with the transmission mechanism 64 and the switching mechanism 131 remaining in the inside 9, thereby improving the maintainability of the transmission mechanism 64 and the switching mechanism 131.

Further, the transmission mechanism 64 is formed of a plurality of sets of switching gears 62 and 63, and the gears 62a and 63a on the side operated by the switching mechanism 131 are formed of metal and the mating gears 62b and 63b are formed of resin. Metal and resin gear 6
The combination of 2a, 62b, 63a, 63b suppresses friction and enables smooth rotation and weight reduction, and eliminates insufficient strength on the gears 62a, 63a side when the shifter 137 or the like is used for the switching mechanism 131. Gear 6
By keeping the 2.63 shape small, it is possible to prevent the seedling feeding case 59 from being enlarged.

Also, a planting frame 20 for driving the planting claws 17, a seedling feed case 59 disposed on one of the left and right sides of the planting frame 20 to drive a 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, the seedling collecting amount adjusting shaft 88 is formed in a structure in which a horizontal shaft portion 88a as a horizontal member and a vertical shaft portion 88b as a vertical member are integrally combined in a substantially L-shape to reduce the number of parts. The seedling collecting amount adjusting shaft 88 is formed in a simple structure to facilitate the assembly and reduce the cost, and the connecting portion between the horizontal axis portion 88a and the vertical axis portion 88b is formed in a curved bending portion. This can also prevent inconveniences such as catching of foreign matter.

Further, the seedling collection adjusting shaft 88 is attached to the reinforcing members 80 and 81 of the side frame 23 supporting the seedling mounting table 16.
, And the number of parts of the support member for supporting the seedling collecting amount adjusting shaft 88 can be reduced, so that the structure can be simplified and the cost can be reduced.

Further, a seedling collecting amount adjusting lever 89 which is a seedling collecting amount adjusting operation member for adjusting the seedling collecting amount of the seedling mounting table 16 is attached to the planting section 1.
5 and the operating portion of the adjustment lever 89 is projected outward of the rear wheel and forward of the fuselage, so that the amount of twisting of the operator's body from the driver's seat position is minimized. As a result, the operability of the seedling collecting amount adjusting lever 89 can be improved, and the degree of freedom of the rotation angle of the seedling collecting amount adjusting lever 89 can be increased, and the arrangement can be simplified.

Further, the rear wheel 8 and the auxiliary wheel 37 outside the rear wheel 8
By arranging the seedling collection adjusting lever 89 between them,
By effectively utilizing the limited space between the rear wheel 8 and the auxiliary wheel 37, the seedling collection adjusting lever 89 is disposed, and compact integration into the planting section 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 which is a planting depth adjusting operation member for adjusting the planting depth to the other side across the rear wheel 8. By arranging the 73, the levers 73 and 89, which require an operation during the operation, can be arranged close to the same side of the center of the machine body, so that their operability can be improved.

The planting frame 20 for driving the seedling planting claws 17 and a seedling feed shaft 58 as a seedling feed member connected to the planting frame 20 via a seedling feed case 59 are provided. A vertical feed cam shaft 65 is formed at one end and a lateral feed screw shaft 66 is formed 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. The right and left weight balance is improved to stably maintain 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 distributed to the left and right from the center of the fuselage to maintain these. It can be easy.

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.

Further, the seedling feeding case 59 is formed into a substantially L-shaped structure having a horizontal case portion 59b connecting the planting frame 20 and a vertical case portion 59a in a vertical direction, and is formed vertically inward from the vertical case portion 59a. The feed cam shaft 65 is extended, and the vertical feed cam 116 faces a substantially U-shaped space formed by the seedling feed case 59 and the cam shaft 65. By reducing the space width, it is possible to increase the degree of freedom in installing these compact components and installing and designing other components.

[0051]

As is apparent from the above embodiments, the present invention provides a planting frame 20 for driving the planting claws 17 and a seedling feed shaft 58 disposed on one of the left and right sides of the planting frame 20. The seedling sending case 59 is formed in a substantially L-shape with a horizontal case portion 59b connected to the planting frame 20 and a vertical case portion 59a connected to the horizontal feeding shaft 58. The speed change mechanism 64 for shifting the speed
9a, the switching mechanism 131 for switching the transmission mechanism 64 is provided in the horizontal case portion 59b. Therefore, the seedling feeding speed can be easily changed by the seedling feeding case 59 provided at a low cost and in a small size. It is possible to secure a good space around 59, increase the degree of freedom in designing and installing accessory parts, and easily remove the case 59 with the transmission mechanism 64 and the switching mechanism 131 remaining in the seedling feeding case 59. Thus, the maintainability of the transmission mechanism 64 and the switching mechanism 131 can be improved.

The transmission mechanism 64 is connected to a plurality of switching gears 6.
Since the gears 62a and 63a on the side operated by the switching mechanism 131 are made of metal and the mating gears 62ba and 63b are made of resin, friction is reduced by a combination of metal and resin gears. In addition to enabling smooth rotation and weight reduction, the strength of the gears 62a and 63a when the shifter 137 or the like is used for the switching mechanism 131 is eliminated, and the shape of the gears 62 and 63 is kept small. It is possible to prevent the seedling feeding case 59 from being enlarged.

[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.

[Explanation of symbols]

 16 seedling mounting table 17 seedling mounting claw 20 planting frame 58 seedling feed shaft 59 seedling feed case 59a vertical case portion 59b horizontal case portion 62/63 switching gear 62a / 62b / 63a / 63b gear 64 transmission mechanism 131 switching mechanism

 ────────────────────────────────────────────────── ─── Continued on front page F term (reference) 2B062 AA14 AB01 BA06 BA13 BA14 BA16 2B064 AA05 AA07 AB01 AC01 EA02 EA06 EA12 EA14 3D039 AA02 AA04 AB14 AC02 AC37 AC65 AC70 AD23 3J067 AA02 AB01 AC06 BA13 DA53 GA14

Claims (2)

[Claims] 1. A planting frame for driving a seedling planting claw, and a seedling sending case disposed on one of the left and right sides of the planting frame to drive a seedling sending shaft, wherein the seedling sending case is attached to the planting frame. A transmission mechanism for shifting the seedling feed speed is formed in the vertical case, and a switching mechanism for switching the transmission mechanism is formed in the horizontal case. Rice transplanter characterized by being provided. 2. A transmission mechanism comprising a plurality of sets of switching gears,
The rice transplanter according to claim 1, wherein the gear operated by the switching mechanism is formed of metal and the mating gear is formed of resin.