JP3306960B2 - Seedling plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission structure of a planting portion in a seedling plant in which seedlings are loaded together with a seedling box.

[0002]

Seedlings were grown in the Related Art seedling box juxtaposed multiple pot was charged for each seedling box planting section is configured seedlings planted machine to perform planting while removed seedlings from該苗week . The seedling box used for this kind of seedling planting machine has flexibility, and while transferring the seedling box along a predetermined shape, for example, a substantially U-shaped transfer path, the seedling box is placed below the transfer path. The seedlings are extruded from the pot and supplied to the seedling picking position of the planting rod.

[0003]

In the planting section of the seedling plant having the above structure, a seedling box is provided as a device for supplying seedlings to the seedling collecting position of the planting rod in addition to the planting rod. A seedling box feeding device for conveying the seedlings along a predetermined conveying route, a seedling extruding device for extruding seedlings from a seedling box at a lower portion of the conveying route, a seedling conveying belt for conveying the seedlings one by one to a seedling collecting position, and the seedling pushing device. Although seedling delivery devices and the like for transferring seedlings pushed out of the seedling box onto the seedling transport belt are provided, it is difficult to efficiently and compactly configure a transmission system for transmitting to each of these devices, There were problems that the transmission system became complicated and the device became large in size.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and the present invention has the following configuration. That is, a seedling transplanter according to the present invention includes a seedling box feeding device that transfers a seedling box along a predetermined transfer route, a seedling pushing device that pushes seedlings out of a seedling box at an appropriate position on the transfer route, A seedling transfer belt for transferring the seedlings to the seedling pick-up position, and a seedling transfer device for transferring the seedlings pushed out of the seedling box by the seedling pushing device onto the seedling transfer belt are provided in the planting section. A seedling transplanter, comprising: a first transmission shaft that transmits the rotational power input to the planting unit in a lateral direction; and a second transmission shaft that is transmitted from the first transmission shaft. The first transmission shaft has a transmission member that transmits to the implantation rod, a transmission member that transmits to the seedling conveying belt, and a second transmission that turns on and off the transmission to the second transmission shaft. A fixed position stop clutch for stopping the shaft at a predetermined position is attached, The second transmission shaft, a cam of the seedling box feed device for driving a cam for said seedling pushing device drive, is characterized in that fitted with the cam for the seedling transfer device driving.

[0005]

The rotational power input to the planting portion is transmitted from the first transmission shaft to the implanting rod and the seedling transport belt by the respective transmission members, and further from the first transmission shaft via the fixed position stop clutch to the second transmission shaft. Power is transmitted to the transmission shaft, and the cams attached to the second transmission shaft drive the seedling box feeding device, the seedling pushing device, and the seedling delivery device. When the fixed position stop clutch is disengaged, the implantation rod and the seedling transport belt remain driven, but the drive of the seedling box feeder, seedling pushing device and seedling delivery device is stopped, so that seedlings are supplied to the seedling picking position. The seedlings are not planted in the field.

Since only two shafts, the first transmission shaft and the second transmission shaft, transmit laterally in the planting portion, the structure of the transmission system of the planting portion is simplified, and the entire planting portion is compact. ,
Cost reduction becomes possible.

[0007]

1 to 26 show an embodiment of the present invention. This seedling planter 1 is a four-wheeled traveling vehicle
Is equipped with a 6-row planting section 3 and a fertilizer application device 4, and is configured as a riding type fertilizer rice transplanter as a whole (accordingly.
Therefore, in the description of the embodiment, it is called "rice transplanter") . The planting section 3 is attached to a parallel link device 5 provided at the rear of the machine 2, and is movable up and down with respect to the machine 2. The parallel link device 5 is moved up and down by a hydraulic cylinder 6.

The planting section 3 is a system in which seedlings are loaded together with the seedling boxes. A frame composed of a transmission case 10 and the like has a planting device 12 for the number of planting strips and a seedling picking position of the planting device. And seedling supply devices for supplying seedlings one by one. Each device for supplying seedlings is a seedling box feeder 14,
An automatic seedling box feeder 15 provided on the seedling box feeder, a seedling pushing device 16 for pushing seedlings from a seedling box at a seedling pushing position of the seedling box feeder 14, and a seedling transport belt described below for feeding seedlings pushed out by the seedling pushing device. Seedling delivery device 17 for delivery to 19;
A seedling dropping device 18 for assisting the seedling delivery device; a seedling transport belt 19 for transporting the seedlings received from the seedling delivery device 17 to a seedling collecting position of the planting device 12.

The seedling box to be used is integrally molded from a flexible synthetic resin material and has a structure shown in FIGS. That is, in the seedling box 300, seedling pots 301,... Opening at the top are arranged vertically and horizontally, and a seedling pushing hole 303 having three radial slits 302 is formed at the bottom of each pot. The seedling pushing hole 303 also serves as a drain. Assuming that the longitudinal direction is vertical and the direction perpendicular to the horizontal direction is horizontal, the pot interval is constant pitch p in the vertical direction, and a boundary portion 306 where the interval between pots is widened in the center in the horizontal direction is provided, On both sides, the same number (for example, seven) of pots are arranged at equal intervals per horizontal row. Therefore, the seedling raising pot is divided into two groups on the left and right sides with the band-shaped boundary portion 306 interposed therebetween. The left and right edges of the seedling box serve as guide ears 307, and the claw holes 308 are formed in the ears at the same pitch as the vertical pitch p of the pot, as viewed in plan. The tip 309 of the ear 307 is bent downward substantially at a right angle. The seedling box 300 is formed thin as a whole, and has flexibility in the front-back and left-right directions. Pot 3
01, ... put seedlings into the seeds and sow them.
Grow to 10

Hereinafter, each part of the planting section 3 will be described.

The seedling box feeder 14 includes a seedling box mounting section 21, a seedling box transport section 22, and an empty box storage section 23. Seedling box mounting part 2
Reference numeral 1 denotes a two-tiered structure, in which a seedling box placing portion
Both (A) and the seedling box placing part 21 (B) at the lower stage are inclined so that the front part is higher, and they merge at the respective rear ends. The junction 26 is connected to the beginning of the seedling box transporting section 22. The seedling box transport section 22 has a substantially U-shape in a side view, and the rear end of the U-shape is the start end and the front end of the U-shape is the end. The empty box storage section 23 is provided in front of the terminal end of the seedling box transport section 22 and has a space in which a plurality of empty seedling boxes can be stacked and held.

The seedling box flow is described as follows. The seedling box 300 placed on the seedling box placing section 21 is sent from the starting end side to the ending side of the seedling box transporting section 22, and from the terminal end of the seedling box transporting section 22. The released seedling boxes are collected in the empty box storage unit 23. The transfer of the seedling box is performed by the automatic seedling box feeding device 15, and the seedling box moves intermittently by the pitch p. During the transportation, the seedlings in the seedling box are pushed backward by the seedling pushing device 16 at a seedling pushing position 27 provided below the seedling box carrying section 22. Since the seedling box 300 has flexibility, it can be transported along a curved transport path. The junction 26 of the upper and lower seedling box placing sections is provided with a branching mechanism described later. At first, the seedling boxes of the lower seedling box placing section 21 (B) are sent to the seedling box transport section 22, and the lower seedlings are transferred to the seedling box transport section 22. Box mounting part 21 (B)
If the seedling box is no longer available, the upper seedling box mounting part 21 (A)
Is transferred to the seedling box transport section 22.

FIG. 6 is a view taken in the direction of the arrow A in FIG. 2, and the supply side portion of the seedling box transport section 22 is provided with the seedling box ear 307 sandwiched between the edge 44a of the bottom plate 44 and the holding metal 45. Box 30
0 is guided. A vertically long rectangular opening 45a is formed in the lower part of the presser fitting 45.

FIG. 7 is a view taken in the direction of the arrow B in FIG. The return side portion of the seedling box transport section 22 is provided with a pair of left and right receiving pipes 48, 48 along the upper surface of the seedling box, and a guide pipe 49 fitted on the back side of the boundary portion 306 of the seedling box. 4
The seedling box is sandwiched between 8, 48 and 49. As shown in the figure, the pair of left and right receiving pipes 48, 48 are connected at their end portions, and the connecting portion 48a has a shape in which the center portion is constricted downward, and corresponding to the constriction of the connecting portion 48a, The vicinity 49a of the end of the guide pipe 49 is bent toward the receiving pipe. For this reason, the seedling box 300 (X) immediately before being discharged from the end of the seedling box transport unit 22 is bent in a direction intersecting the feeding direction so as to be convex downward as shown in the figure. This increases the rigidity of the seedling box 300 (X) in the front-rear direction, so that the seedling box does not bend more than necessary in the feed direction (front-back direction) at the time of release, and the empty box storage section 23
Can be collected successfully.

The automatic seedling box feeder 15 has the structure shown in FIGS. Reference numeral 50 denotes an automatic feed rod, which has an automatic feed claw 51 inserted into the opening 45a of the presser fitting 45 and engaged with the lower wall surface of the claw hole 308 of the seedling box. The automatic feed rod 50 is provided with a roller shaft 5 provided at the tip of the swing arm 53.
4 is attached to the seedling box path side via a torque spring 55 so as to be urged toward the seedling box path side, so that the swing arm 53 moves up and down as it swings around the support shaft 57. When the automatic feed lever 50 is at the lower limit position, the automatic feed claw 51 is set to be located at the seedling pushing position 27. The swing arm 53 is driven via a seedling feed rod 58. Reference numeral 60 denotes a control rod having a control claw 61 inserted into the opening 45a and engaged with the upper wall surface of the claw hole 308 of the seedling box. The stop rod 60 is rotatably supported by a support shaft 62, and a lower end portion of the stop rod 60 slidably abuts the roller shaft 54. Therefore, when the swing arm 53 moves upward, the lower portion of the control rod 60 is pushed rightward, and the control claw 61 is moved to the claw hole 308.
It comes out of the. Further, when the stop rod 60 is pushed for a certain amount or more, this is
The automatic feed claw 51 is also disengaged from the claw hole 308 by engaging with a.
Reference numeral 65 denotes a leaf spring brake, which functions to prevent the seedling box from dropping by its own weight by engaging the hook portion 65a with the claw hole 308. Next, the seedling feeding operation will be described with reference to FIGS.

FIG. 10 shows a state in which the swing arm 53 swings downward, and the automatic feed claw 51 of the automatic feed rod 50 and the stop claw 61 of the stop rod 60 are fitted into the opening 45a. The upper wall surface of the claw hole 308 of the seedling box (the lower end surface of the seedling box in the initial state) is received by 61, and the seedling box 300 is held stationary.

FIG. 11 shows a state in which the swing arm 53 swings upward. When the automatic feed rod 50 moves upward, the automatic feed claw 51 slides along the upper wall surface of the claw hole 308, and the automatic feed claw is moved. 51 is pushed out from the claw hole 308,
The lower portion of the control rod 60 is rotated rearward by being pushed by the roller shaft 54, and the control claw 61 is also disengaged from the claw hole 308. By the action of the leaf spring brake 65, the seedling box 300 is held at the same position.

When the swing arm 53 rotates downward from the state shown in FIG. 11, the automatic feed claw 51 of the automatic feed rod 50 is fitted into the claw hole 308 as shown in FIG. At this point, the control claws 61 of the control rod 60 are still out of the claw holes 308. In this state, when the swing arm 53 further rotates, the automatic feeding claw 51 pushes down the lower wall surface of the claw hole 308 to convey the seedling box 300 by one pitch p. The upper seedling box falls under its own weight. When the swing arm 53 rotates to the bottom dead center, the regulation by the roller shaft 54 is released, the stopping claw 61 is fitted into the claw hole 308, and the state returns to the state of FIG.

The seedling box feeder 14 is provided with the automatic seedling box feeding device 1.
5 is provided with a manual seedling box feeder 69. 8 and 9, reference numeral 70 denotes a manual feed rod, which has a manual feed pawl 71 similar to the automatic feed pawl 51 and a seedling box via a torque spring 75 on a roller shaft 74 provided at an intermediate portion of the manual lever 73. It is attached in a state of being urged toward the transport path. When the manual feed rod 70 is always in the home position shown in FIG. 8 and the seedling box is moved by one pitch p, the manual feed nail 71 is fitted into the nail hole 308 of the seedling box and the manual feed nail is moved. 71 is swung so as to be pushed out from the claw hole 308. When the manual lever 73 is reciprocated within the range shown in FIG. 13, when the manual lever 73 rotates downward, the manual feed claw 71 pushes down the lower wall surface of the claw hole 308 to cause the seedling box 30 to move downward.
0 is conveyed in the feed direction by one pitch p. When the manual lever 73 is slightly moved up from the home position, the roller shaft 7
4 presses the upper part 60a of the control rod 60, the control rod 60 rotates counterclockwise, and the control claw 61 is disengaged from the claw hole 308, so that the seedling box can be transported by the manual seedling box feeder 69. is there.

Further, when the manual lever is moved up to the position shown in FIG. 14 and the manual feed pawl 71 is engaged with the locking piece 71a, the stop rod 60 is engaged with the engaging portion 50a of the automatic feed rod 50. Since the automatic feed rod 50 is rotated backward, the automatic feed claw 51 of the automatic feed rod 50 is also disengaged from the claw hole 308, and the seedling box can freely fall.

The manual feed rod 70 also functions as a stopper for preventing the seedling box from falling when the seedling box is loaded. 76 is a spindle 77
The tip bending portion 76a of the stopper arm is rotatably supported on the projection 70a formed on the side surface of the manual feed rod 70. Stopper arm 7
Reference numeral 6 is provided on a path through which the ear 307 of the seedling box passes, and is urged by a spring 78 in a direction opposite to the feeding direction of the seedling box. When the seedling box 300 is present on the transport path, the stopper arm 76 is pushed by the seedling box 300 and
5, the manual feed rod 70 is free. However, when the seedling box disappears on the transport path, the stopper arm 76 rotates to the position shown by the solid line in FIG. 15 due to the contraction force of the spring 78, and the distal bent portion 76a engages with the projection 70a. Operation 70 is restricted. Therefore, if the seedling box 300 is loaded when the seedling box of the seedling box feed stand 14 is empty, the seedling box 300
Is once received and held by the manual feed pawl 71 of the manual feed rod 70. By doing so, it is possible to prevent the seedling box from suddenly dropping to the lower part of the seedling box transport section 22 when the seedling box is loaded and causing troubles in the seedling and seedling box feeding device 15. By operating the manual lever 73 and slightly raising the manual feed rod 71,
Since the engagement between the bent end portion 76a of the stopper arm and the projection 70a is released and the manual feed rod 70 becomes free, the held seedling box can be dropped. When the seedling box falls, the stopper arm 76 is pushed to the position shown by the chain line.

The rod 80 on which the spring 78 is loosely fitted is linked to the swing arm 53 by a connecting member 81. When the swing arm 53 swings upward, that is, when the automatic feed claw 51 and Suppressing claw 61 is claw hole 3
When the distance from the position 08 is released, the spring 78 is contracted and the urging force of the stopper arm 76 is increased. As described above, the seedling box 300 is held by the leaf spring brake 65 when the automatic feeding claw 51 and the stopping claw 61 are disengaged from the claw hole 308 immediately before the seedling feeding. The leaf spring brake 65
Just cannot be supported. Therefore, at this time, the stopper arm 76 acts as a brake for preventing the upper seedling box from moving downward, and assists the leaf spring brake 65.

The stopper arm 76 forms a part of the flow dividing mechanism. That is, the switching stopper 90 is rotatably provided at the merging portion 26 of the upper and lower seedling box mounting portions, and the switching stopper and the stopper arm 76 are connected by the connecting rod 91. When the stopper arm 76 is at the position indicated by the dashed line in FIG. 15, the switching stopper 90 is also at the position indicated by the dashed line, and the seedling box transport path of the upper seedling box mounting portion 21 (A) is closed. For this reason, initially, the seedling box 300 placed on the lower seedling box placing portion 21 (B)
Is supplied to the seedling box transport section 22. Seedling box mounting part 21 at the bottom
When the seedling box of (B) has been supplied and the rear end of the seedling box 300 has passed through the stopper arm 76, the switching stopper 90 rotates to the position indicated by the solid line in conjunction with the stopper arm 76, and the seedling box transport path is moved. Since it is open, the upper seedling box mounting part 2
The seedling box placed in 1 (A) is supplied to the seedling box transport section 22.

A sensing switch 93 for sensing the presence or absence of a seedling box is provided between the manual feed rod 70, which is a stopper for preventing falling, and the seedling pushing position 27, and the detection result is output to, for example, a seedling reduction lamp 94 of a center mascot. It is displayed. When the seedling reduction lamp 94 is turned on, the operation is stopped, a new seedling box is supplied to the seedling box mounting unit 21, and the empty boxes loaded in the empty box storage unit 23 are removed. If the sensing switch 93 is provided at the position of the present embodiment, seedlings can be replenished before the seedlings completely disappear, so that planting shortage is prevented and the manual feed rod 7 is provided.
When 0 functions as a stopper, the sensing switch 9
3 senses the decrease in seedlings, the replenished seedling box is once received by the manual feed rod 70, and displacement of the seedling box due to impact or the like can be prevented.

The seedling pushing device 16 is provided with the seedling box feeder 14.
A predetermined number (14 in the illustrated example) of seedling pushing pins 100,... For pushing out seedlings one row at a time from the seedling box located at the seedling pushing position 27 of FIG. The seedling pushing rods 102, 102 supporting both ends of the mounting member 101 to which the seedling pushing pins 100,.
Is reciprocated back and forth by the seedling pushing mechanism 106 (see FIG. 19) inside the seedling pushing pins 100,... When the seedling pushing pins 100,. The seedlings are pushed backwards.

The seedling pushing mechanism 106 is configured as follows. That is, the sector gear 109 attached to the seedling pushing drive shaft 203 and the small-diameter gear 110 mesh with each other, and the large-diameter gear 111 engages with the rack 112 attached to the seedling pushing rod 102. The shaft 203 rotates intermittently repeatedly, and the motion is converted into reciprocating motion and transmitted to the seedling pushing rod 102. A stopper pin 115 is loosely fitted in an arc-shaped long hole 114 formed in the sector gear 109 for stroke control.

The seedling delivery device 17 includes a gear case 120.
And support shafts 121a, 121 provided before and after the gear case.
A pair of left and right links 121, 1 each having a base supported by 2a
21, 122, 122 and connecting members 123, 123 connected to the distal ends of the pair of links by connecting shafts 121 b, 121 b, 122 b, 122 b, constitute a parallel link device. A seedling holder 125 is provided so as to span between the integrated arched brackets 124 in rear view. Seedling holder 1
25 are formed with concave portions 125a,... Having a circular bottom so that the floor soil portion 310a of the seedling 310 can be fitted. Further, since the seedling holder 125 is fixed to the brackets 124, 124 by mounting members 125b, 125b projecting rearward from both left and right ends thereof, the rear side is open in a plan view. The link 1 on the front side
The support shaft 121a of the actuator 21 is coaxial with the swing arm support shaft 57 of the automatic seedling box feeder 15. In other words, it can be said that the swing arm 53 is attached using one protruding end of the support shaft 121a.

In the gear case 120, a large-diameter drive gear 127 fitted to the input shaft 126 and the support shaft 121a,
Small-diameter driven gears 128 and 129 fitted to 121a are incorporated. The gear ratio of both driven gears 128 and 129 is assumed to be the same. A driven arm 131 is attached to a portion of the input shaft 126 protruding outside the case, and a drive arm 132 attached to a seedling transfer drive shaft 201 described later and the driven arm 131 are connected by a connecting rod 133. In FIG. 20, reference numerals 135 and 136 denote stoppers for restricting the vertical rotation range of the link 121, and reference numeral 137 denotes a buffer spring interposed on the connecting rod 133.

The input shaft 126 repeatedly rotates forward and backward by a predetermined angle, whereby a pair of left and right links 121, 121,
122, 122 swings up and down.
0, and moves between the seedling receiving position (E) and the seedling releasing position (FG). From the input shaft 126 to the two support shafts 121a, 1
Since the transmission is performed at an increased speed, the driven arm 131
The operating angle of both links 121 and 122 is larger than the operating angle of. Since both links 121 and 122 are driven together, the operation is performed smoothly and smoothly even at the moment when the connecting member 123 becomes parallel to the links 121 and 122. When the seedling holder 125 is at the middle point of the FG, the links 121, 1
Since the connection shafts 121b and 122b are located immediately below the support shafts 121a and 122a, which are the pivots of the rotation, the seedling holder 125 moves substantially horizontally forward between FG.

The seedling removing device 18 has a seedling extracting arm 140 and a seedling hitting arm 141. Seedling removal arm 140
The rear end is branched to a predetermined number of seedling removal parts 140a,. The lower part of the seedling removal parts 140a,.
Have a circular shape in rear view corresponding to the concave portions 125a,. The rear portion of the seedling hitting arm 141 also branches into a predetermined number, and the rear end portion is a horizontally bent seedling hitting portion 141a. The seedling hitting arm 141 is rotatably attached to the support shaft 142, and moves the operating arm 144 fixed to the seedling hitting arm to the seedling hitting cam 145 and the return spring 14.
By swinging at 6, the seedling hitting arm 141 rotates up and down. That is, the seedling hitting arm 141 is always in the raised position, and when the roller 147 of the operating arm 144 is fitted into the concave portion 145a of the seedling hitting cam 145, the operating arm 144 is pulled up by the action of the spring 146, and the seedling hitting arm 141 is moved. It moves down momentarily. Even when the seedling hitting arm 141 is moved down,
The seedling hitting arm is set so as not to enter the path of the seedling holder 125.

When the seedling holder 125 is at the seedling receiving position (E), seedlings are pushed out of the seedling box by the seedling pushing device 16 and the seedlings are pushed into the recesses 125a,. Since the rear of the seedling holder 125 is open, a long seedling with a leaf 310b can be held by the seedling holder 125. Then, while holding the seedling, the seedling holder 125
Rotates to the release position (FG). When the seedling holder 125 moves from the point F to the point G, the seedling removing portion 1 of the seedling removing arm
40a are inserted into the recesses 125a of the seedling holder, and the seedlings held in the recesses are relatively pulled out rearward.
As described above, since the seedling holder 125 moves substantially horizontally forward between F and G, the seedling extraction portions 140a,.
a,... are inserted linearly into the seedling holder 12.
The seedling removal from 5 is performed well. Furthermore, seedling holder 1
When the point 25 reaches the point G, the seedling tapping arm 141 moves down, and knocks the seedlings pushed out from the recesses 125a onto the seedling transport belts 19, 19. Thus, if the seedling removing arm 140 and the seedling hitting arm 141 are separated,
The seedling does not adhere to the arm when the seedling is hit, and the seedling is reliably dropped on the seedling transport belt 19.

The seedling transport belt 19 is formed by two adjacent strips (L,
R) make a pair, and the pair of seedling transport belts 19 (L, R) are bilaterally symmetric. The seedling transport belt 19 is stretched around a pair of rollers 150 and 151, and the belt always moves in the direction of the arrow as the drive roller 150 rotates in a predetermined direction. The 14 seedlings transferred from the seedling transfer device 17 are placed on the upper surfaces of the right and left seedling transport belts 19 (L, R), seven by seven. Then, the seedlings are transferred to the seedling transport belt 19 (L,
Conveyed R) is outwardly, one by one and sequentially supplies a seedling seedlings up position T ₁ of the planting device 12. Further, the lower seedling-up position T _1, the guide plate 153 for guiding the seedling until field surface is provided at the planting by the planting device 12.

The implanting device 12 includes a rotary case 160 having a circular shape in a side view, and a pair of spatula-shaped implanting rods 161 and 161 provided on the rotary case. The internal structure of the rotary case 160 is as shown in FIGS. In the figure, reference numeral 163 denotes a planting device mounting shaft supported on the rear end of the transmission case 10, and a fixed metal 165 is fitted to a distal end of the planting device mounting shaft by a key 164, and a rotary metal is further mounted on the fixed metal. Case housing 166 is fixed. Therefore, the rotary case 160 rotates integrally with the planting device mounting shaft 163. An annular guide groove 168a is provided around the planting device mounting shaft 163.
Is fitted. The cam 168 is rotatable with respect to the housing 166 by a bearing 169, and is integrated with a fixed plate 170 fixed to the transmission case 10 by a claw 168b. A pair of rollers 172 and 172 are fitted in the guide groove 168a of the cam 168. These rollers 172
Is an arm 1 rotatably fitted around the support shaft 173.
74. A gear 175 is formed on the arm 174, and the gear 174 meshes with a gear 178 attached to the planted rod attachment shaft 177. The implantation rod 161 is fixedly attached to the implantation rod mounting shaft 177 by cotter pins 179.

When the implanting device mounting shaft 163 rotates in a predetermined direction, the rotary case 160 integrated therewith also rotates, and the implanting rod 161 moves while drawing a closed locus T (see FIG. 23). At this time, the rollers 172 and 172 move along the guide groove 168a of the implantable rod operating cam 168, so that the arm 174 swings.
It is transmitted to the implanted rod mounting shaft 177 via 178. For this reason, the angle of the implantation rod 161 changes slightly during movement. That is, when passing through the seedling collecting position T ₁ , it is in a horizontal state, and is parallel to the seedling 310 supplied to the seedling collecting position T ₁ by the seedling transport belt 19. Then, pivots down while keeping intact orientation relative to the rotary case 160, directs the seedling into the planting position T ₂ through inside of the guide plate 153. After planting, by changing the posture to Uekomi杆161 is rotated forward relative to the rotary case 160, since the relative operates as Uekomi杆160 is withdrawn to just above, planting Separation of the inserting rod 160 and the seedling is performed without difficulty, and the posture of the planted seedling 310 is not disturbed.

As shown in FIG. 3, the transmission case 10
Input case 180, three cam cases 181,...
And four chain cases 182,... Input part case 180 and cam case 1
The rear part of the chain 81 and the front part of the chain case 182 have a cylindrical shape, and the respective parts are joined and integrated at this cylindrical part. The cam cases 181,... Are commonly used by two adjacent members, but the central cam case 181 (C) has a shorter left cylindrical portion, and the input portion 18
0 is provided. Then, a total of six planting devices 12, one on each side of the rear ends of the two chain cases 182 (2, 3) at the center and inside the rear ends of the chain cases 182 (1, 4) on both the left and right sides, are provided. Is provided.

Next, the internal structure of the transmission case 10 will be described (see FIGS. 17 and 18).

The PTO output of the main unit 2 is input case 180
A pair of bevel gears 190 and 19 are input to an input shaft 185 in the inside and are connected to the main shaft 186 supported by the cylindrical portion from the input shaft.
1 transmitted. This transmission is configured as a safety clutch. That is, the gear 190 is connected to the input shaft 18.
5, the input shaft 185 and the gear 19
0 is transmission-coupled via a clutch body 192. The clutch body 192 is slidable with respect to the input shaft 185, and the transmission body 190a,
192a are engaged. Therefore, when the load exceeds a certain level, the clutch 192 is disengaged from the gear 190 against the pressing force of the spring 193, and the transmission is stopped. When the cylinder 195 receiving the spring 193 is shifted by the shifter 196 in a direction away from the clutch 192, the transmission is stopped regardless of the magnitude of the load.

On the main shaft 186, in addition to the bevel gear 191, each sprocket wheel 221,
... and, each seedling conveyor belt drive bevel gears 226, ... and,
Gear 21 for driving the cam mechanism in each cam case 181,.
, And ridge clutches 220 for turning on and off the transmission to the cam mechanism in units of two lines are provided.

Chains 223 are stretched between the sprocket wheels 221 and the sprocket wheels 222 mounted on the planting device mounting shafts 163 so that the rotational power of the main shaft 186 is applied to each plant. Are always transmitted to the devices 12,.

The bevel gears 227 attached to the seedling conveying belt drive roller shafts 225,.
Are engaged and are directly transmitted from the main shaft 186 to the seedling transport belt drive roller shafts 225,.

The structure of the ridge clutch 220 is as follows. That is, the gear 212 is rotatably and slidably fitted to the main shaft 186, a clutch body 216 is integrally provided on the gear, and a claw cylinder 216a of the clutch body and a claw cylinder attached to the main shaft 186 by a key 219. 217 claws 217
and a. Clutch body 21
6 has a tapered surface 216b, and when the clutch pin 218 is pressed against the tapered surface 216b, the clutch body 216
Is disengaged from the claw cylinder 217 and the clutch is disengaged. At this time, the clutch is disengaged when the clutch body 216 reaches a predetermined angle. This structure is for mat seedlings
A well-known fixed-position clutch widely used in rice transplanters, etc.
The same is true. Therefore, the automatic seedling box feeding device 15, the seedling pushing device 16, the seedling delivery device 17, and the seedling removing device 18 driven by the cam mechanism described later engage and disengage the clutch in units of two lines, and disengage the clutch. In these cases, each of these devices is stopped at a fixed position.

In the cam case 181, there are provided a camshaft 200 which is transmitted from the main shaft 186 and always rotates in a constant direction, and three camshafts which are cam-driven by the camshaft and intermittently rotate .
Shafts , ie, seedling transfer drive shaft 201, seedling box feed drive shaft 2
02 and a seedling pushing drive shaft 203 are supported. In FIG. 18, 205 is a seedling transfer cam, 206 is a roller contacting the same, 207 is a seedling box feed cam, 208 is a roller contacting the same, 209 is a seedling pushing cam, and 210 is a roller contacting the same. The seedling hitting cam 145 is attached to one end of the camshaft 200 projecting out of the case.

The seedling transfer drive shaft 201 is provided with the seedling transfer drive arm 132 for driving the seedling transfer device 17.
Is attached. A seedling feed drive arm 211 having a tip connected to the seedling feed rod 58 is attached to the seedling feed drive shaft 202. The support shaft 57 of the swing arm 53 is connected to the support shaft 121 of the link 121.
a.

As described above, the means for driving the planting device (sprocket wheels 221,...) And the means for driving each seedling transport belt (bebe gear 226) are provided on the first shaft (main shaft 186) which is transmitted laterally from the input portion. ,..), And transmission means (ridge clutch 220 and gear 212) to the cam mechanism, and each cam (seedling transfer cam 2) is mounted on the second shaft (cam shaft) 200.
05, the seedling feed cam 207, and the seedling pushing cam 209) can be mounted so that only two shafts can be transmitted in the lateral direction, thereby simplifying the overall structure and reducing the weight. It has become possible. In addition, by assembling the transmission case into parts for each function, it is easy to assemble the transmission case. further,
By arranging the planting device 12 on both sides of the central two chain cases 182 (2, 3), the number of chain cases can be reduced.

Planting device 12 and seedling supply devices 15, 1
FIG. 26 is a timing chart showing the operation timings of 6, 17, 18, and 19. This figure means the following.

(1) “Seedling picking positions” a _{1 to} a ₇ indicate the timing at which the implantation rod 181 passes the seedling picking position T ₁ .

(2) The “implantation rod stop position” b _{1 to} b ₇
This is the timing at which the planting device 12 stops, which is indicated by the vertical position of the rotary case 160.

[0048] (3) "Naeoku Ri" represents the operation of the automatic feeding claw 51 starts upward movement in c _1, start the engagement of the seedling box by c _2, the upward movement is stopped by c ₃ And starts lowering at c ₄ , c
Down movement stops at ₅ . When the feed claw 51 moves down, the seedling box is moved by one pitch.

(4) Regarding “seedling extrusion”, d ₁ -d
Seedlings extrusion pin 100 protrudes seedling push-out pin 100 between d ₂ -d ₃ retreats between _2.

(5) The “seedling delivery” is the seedling delivery arm 11
1 shows the operation, and rotates in the seedling transport direction between e _{1 and} e ₃ ,
It stops between e ₃ -e _{4 and} turns in the return direction at e ₄ -e ₅ . However, when rotating in the seedling transport direction, the first half (e ₁ −
e ₂₎ has a high speed, the second half (e ₂ -e ₃₎ has become slow. This is to ensure that the seedling removal device 18 removes and knocks the seedlings.

[0051] (6) "seedling hit" represents the operation of the seedlings hitting arm 141, moves downward between f ₁ -f _2, while f ₂ -f ₃ is stopped at the downward position, f ₃ -f ₄ Move up between. Since the downward movement of the seedling hitting arm is performed by the spring 146, the speed is high. Also, the seedling holder 124 starts returning while the seedling hitting arm 141 is stopped at the downward movement position, but since the seedling hitting arm 141 does not enter the path of the seedling holder 124 as described above, they may come into contact with each other. There is no.

(7) gg represents the stop timing when the ridge clutch 220 is disengaged. At this time, the seedling pushing pins 100,... Of the seedling pushing device 16 are retracted, and the seedling delivery device 17 Immediately before the seedlings are removed from the holder 125, the seedling box feeder 15 has finished feeding the seedling boxes. Therefore, when the operation is resumed, the seedlings are immediately supplied onto the seedling transport belt 19, so that planting is performed immediately. Also, since the seedling holder 125 stops while descending,
The reverse rotation of the seedling holder 125 due to its own weight is not transmitted to the drive side. Furthermore, since the seedling box is fixed when the seedling box has been sent, the seedling box does not shift during movement.

Below the planting section 3, a center float 250 located at the center of the left and right sides is provided as a float for leveling.
(C) and a side float 250 (L, R) located behind the rear wheel of the machine 2. Each float 2
50 (L, C, R) has a wide front portion and a narrow rear portion, and groove forming devices 251 for forming a groove for seedling transplantation are attached to both left and right sides of the rear portion. Float 250
(L, C, R) are pivotally attached to a rear end of a float support rod 252 provided on the transmission case 10 so as to be rotatable up and down by a support pin (not shown), and a front part of the enlargement / reduction link 2 is provided.
The front part moves up and down according to the unevenness of the paddy field surface.

The center float 250 (C) is a sensor for detecting the height of the paddy field, and the hydraulic valve 2 for controlling the hydraulic cylinder 6 based on the vertical movement of the center float.
The spool 57 is switched, and the planting unit 3 is controlled so as to have a constant height with respect to the paddy field surface. For this reason, the planting depth of the seedlings is always kept constant. By rotating the float support rod 252 to change the support height of each float,
The planting depth of the seedlings can be adjusted.

The fertilizer applicator 4 includes a hopper 26 for storing fertilizer.
0 and a feeder 261 for feeding the fertilizer in the hopper downward.
And a fertilizing pipe 262 for guiding the fertilizer fed from the feeder to a groove for planting seedlings. Fertilizer pipe 262
Extends downward from the feeder 261 along the lower surface of the empty box collection unit and the front surface of the seedling box feeder 14, and further extends at the lower end of the seedling box feeder 14 and the input unit case 180 of the transmission case 10 .
Alternatively , the fertilizer discharge port 263 extends rearward through the space between the cam cases 181 and faces the field scene inside the groove generator 251.

At the time of the planting operation, the planting section 3 is lowered to the work position shown in FIG.
Then, the fertilizer applicator 4 is driven, fertilizer is supplied to the seedling-planting grooves formed in the field scene with progress, and seedlings are planted immediately thereafter.

Next, FIGS. 27 and 28 show different embodiments of the transmission case. This transmission case 270
Are input unit case 271, cam case 272,
..., chain case 273, ... and bevel gear case 2
74,.., And each of these cases is attached to a frame pipe 276 arranged in the lateral direction. The main shaft 186 is divided into three shafts, each of which is coupled with two couplings.
Connections are made at 77 and 277. These three spindles 186
Since the gears 191, 212, 226 and the sprocket wheel 221 are individually supported by roller bearings or bushes, they can be pulled out in an assembled state. As described above, when the respective parts of the transmission case are separated and independent for each function, the number of parts increases, but there are many advantages such as easy assembly and maintenance.

[0058]

As described above, in the seedling transplanter according to the present invention, the number of transmission shafts of the planting portion can be reduced to only two in the lateral direction. The configuration of the system is simplified, and the weight, size, and cost of the entire planting section can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a side view of the planting section.

FIG. 3 is a plan view of a planting section.

FIG. 4 is a plan view of a central portion of a planting portion.

FIG. 5 is a plan view of a side portion of the planting portion.

FIG. 6 is a view as viewed in the direction of arrow A in FIG. 2;

FIG. 7 is a view as seen from the arrow B in FIG. 2;

FIG. 8 is a side view of the seedling box feeding device.

9 is a view as viewed in the direction of arrow C in FIG. 8;

FIG. 10 is a first explanatory diagram of the seedling feeding operation.

FIG. 11 is a second explanatory diagram of the seedling feeding operation.

FIG. 12 is a third explanatory diagram of the seedling feeding operation.

FIG. 13 is an explanatory diagram 1 of an operation of the manual seedling feeding device.

FIG. 14 is a second explanatory view of the operation of the manual seedling feeding device.

FIG. 15 is a third explanatory diagram of the operation of the manual seedling feeding device.

FIG. 16 is a side view of a main part of the planting part.

FIG. 17 is a first sectional view of a transmission case and the like.

FIG. 18 is a second sectional view of a transmission case and the like.

FIG. 19 is a side sectional view of the seedling pushing device.

FIG. 20 is a side sectional view of a seedling delivery device and a seedling removing device.

FIG. 21 is a rear view of the seedling holder and the seedling removing arm.

FIG. 22 is a sectional view of a mounting portion of a seedling removing arm and a seedling hitting arm.

FIG. 23 is a side view of the planting device.

FIG. 24 is a sectional view of the planting device.

FIG. 25 is a side view showing the internal structure of the planting device.

FIG. 26 is a time chart showing the operation timing of each operation unit.

FIG. 27 is a plan view of a transmission case of another embodiment.

FIG. 28 is a side view of the transmission case shown in FIG. 27.

FIG. 29 is a plan view of a seedling box.

30 is a view as viewed in the direction of the arrow D in FIG. 29 .

FIG. 31 is an enlarged plan view of a seedling raising pot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rice transplanter (seedling machine) 2 This machine 3 Planting part 4 Fertilizer application device 5 Parallel link device 10 Transmission case 12 Planting device 14 Seedling box feed stand 15 Seedling box automatic feeding device 16 Seedling pushing device 17 Seedling delivery device 18 Seedling removal device 19 seedling conveyor belt 145 seedlings hitting cam 180 input unit case 181 cam case 182 thien case 205 seedlings transfer cam 207 seedling box feed cam 209 seedlings extrusion cam 220 furrow clutch 221 a sprocket wheel Lumpur 226 Beberugi ya 300 seedling box 310 seedlings

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tetsu Kato 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Company Engineering Department (72) Inventor Shinichiro Yano 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Engineering Department (56) References JP-B-58-51722 (JP, B2) (58) .Cl. ⁷ , DB name) A01C 11/02

Claims (1)

(57) [Claims] 1. A seedling box feeding device for transferring a seedling box along a predetermined transfer route, a seedling pushing device for extruding seedlings from a seedling box at an appropriate position on the transfer route, and a seedling having a planting rod for each seedling. and seedling conveyor belt for conveying the taken position, the seedling transfer device for changing the seedlings extruded from seedling box and transferred on the seedling conveyor belt by the seedling pushing device is a seedling planting machine provided in the planting unit A first transmission shaft for transmitting the rotational power input to the planting portion in the lateral direction, and a second transmission shaft transmitted from the first transmission shaft are arranged in parallel, and the first transmission shaft has A transmission member for transmitting to the implanted rod, a transmission member for transmitting to the seedling conveying belt, and stopping the transmission at the predetermined position when the transmission to the second transmission shaft is turned on and off and the transmission is cut off. And a fixed position stop clutch to be
The transmission shaft is a cam of the seedling box feed device for driving, seedling planting machine, characterized in that the cam for the seedling pushing device drive, fitted with a cam for the seedling transfer device driving.