JP3147047B2 - Seedling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, seedlings raised in a seedling box in which a plurality of pots are arranged side by side are loaded into a planting section together with a seedling box, and planted while taking out the potted seedlings from the seedling box. There is a rice transplanter. However, the rice transplanter has a configuration in which an operator directly supplies a seedling box to the seedling box transport unit, and the supply operation of the seedling box is complicated, and there is a problem in workability.

[0003]

According to the present invention, a plurality of seedling box mounting portions 21 (A) and 21 are provided in order to solve the conventional problems.
(B), the lower side of the seedling box conveyance constitutes a conveyance path for conveying the seedling box 300 by contacting the start end of the seedling box conveying part 22, and the seedling pushing device 16 in the seedling box conveying part 22 causes the seedling box 300 to move. A seedling box transporting the seedling box,
One seedling box mounting part 21 that supplies the seedling box 300 to the part 22
On the other hand, the seedling box is placed on another seedling box placing part 21 (A) .
The seedling box 300 on the section 21 (A) is supplied to the seedling box transport section 22.
Provided with a switching stopper 90 to lest locking, seedling box 300 of seedling box sensor 76 seedling pushing device 16 of the seedling box conveyance unit 22 is provided in the seedling box transport upstream side than the site of action
Is detected, the switching stopper 90
The seedling box 300 is locked by the switching stopper 90
An automatic seedling box supplying means for supplying the seedling box 300 of the seedling box placing section 21 (A) to the seedling box transport section 22 is provided as a seedling planting machine.

[0004]

According to the present invention, the seedling box transport section 22 is provided.
To one seedling box mounting part 21 (B) that supplies the seedling box 300
Other seedling box rest portion 21 against (A), placed該苗box portion 21
(A) Do not supply the seedling box 300 above to the seedling box transport unit 22
Provided with a switching stopper 90 to cormorants locking, by detecting that seedling box 300 of seedling box sensor 76 seedling pushing device 16 of the seedling box conveyance unit 22 is provided in the seedling box transport upstream side than the site of action is exhausted The switching stopper 90 is switched, and the seedling box 300 is locked by the switching stopper 90.
The seedling box 300 of the seedling box placing part 21 (A) is transferred to the seedling box transporting part 2.
2 is provided with an automatic seedling box supply means, which supplies a plurality of seedling box placing parts 21 (A) and 21 at the start of work.
If the seedling boxes 300 are placed on each of (B), the seedling boxes 300 of the seedling box placing sections 21 (A) and 21 (B) are automatically supplied to the seedling box transporting section 22 in sequence, and the operation is performed. Are released from the work of frequently supplying seedling boxes to the seedling box transport section as in the conventional example,
An effect is obtained that seedling planting work can be performed very efficiently and with good workability.

[0005]

1 to 30 show an embodiment of the present invention. The rice transplanter 1 is configured as a ride-type fertilizer rice transplanter as a whole, in which a six-row planting section 3 and a fertilizer device 4 are mounted on a riding type traveling vehicle 2 which is a four-wheel traveling vehicle. The planting section 3 is attached to a link device 5 provided at a rear portion of the riding type traveling vehicle 2, and is capable of moving up and down with respect to the riding type traveling vehicle 2. The 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 a seedling box, and a frame constituted by a transmission case 10 and the like has a planting device 12 for the number of planting strips and a seedling removal of the planting device 12. Each device for supplying seedlings for supplying seedlings one by one to the position is assembled. Each device for supplying seedlings is a seedling box feeder 1
4. a seedling box automatic 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 pushed out by the seedling pushing device is described later. Seedling delivery device 1 for delivery to conveyor belt 19
7, a seedling removing device 18 for assisting the seedling transfer device, a seedling transfer belt 19 for transferring the seedlings received from the seedling transfer device 17 to a seedling collecting position of the planting device 12, and the like.

The seedling box to be used has the structure shown in FIGS. 28 to 30, and is integrally formed of a flexible synthetic resin material. 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. This seedling extrusion hole 30
3 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 are ears for guidance 307
The claw holes 308 are formed in the ear portions at the same pitch as the pitch p in the vertical direction of the pot and are rectangular in plan view.

The tip 309 of the ear 307 is bent downward at a substantially right angle. The seedling box 300 is formed thin as a whole, and has flexibility in the front-back and left-right directions. The seedlings are put into pots 301,..., And seeded, and grown up to adult seedlings 310 of a certain size. Hereinafter, each section 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 (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 starting end,
The front end of the character is terminated. 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.

Referring to the flow of the seedling box, the seedling box 300 placed on the seedling box placing part 21 is sent from the starting point to the terminating side of the seedling box conveying part 22, and from the terminal part of the seedling box conveying part 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 member 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 on arrow B in FIG. Seedling box transport section 2
2 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.
The seedling box is sandwiched between 8,49. As shown
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 central portion is constricted downward, and the guide pipe 49 of the guide pipe 49 corresponds to the constriction of the connecting portion 48a. The end 49a is bent near the receiving pipe. For this reason, the seedling box 300 (X) immediately before being released from the end of the seedling box transport unit 22 is
It is bent in a direction that intersects the feed direction so as to be convex downward. 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.

A leaf spring brake 65 prevents the seedling box from dropping under its own weight when the hook 65a is engaged with the claw hole 308. Next, FIG.
12 will be described with reference to FIG. FIG. 10 shows a state in which the swing arm 53 has been swung downward, and the automatic feed pawl 51 of the automatic feed rod 50 and the stop pawl 61 of the stop rod 60 are shown.
Is 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 the stopping claws 61, and the seedling box 300 is held stationary. I have.

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 also comes off 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 claws 51 of the automatic feed rod 50 are fitted into the claw holes 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 feeder 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 portion 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 control 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 serves as a stopper for preventing the seedling box from falling when the seedling box is loaded. Reference numeral 76 denotes a stopper arm rotatably supported by a support shaft 77.
The projection 70a is formed on the side surface of the "0". The stopper arm 76 is provided on a path through which the ear portion 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 to the position shown by the chain line in FIG. 15, and 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 and the projection 70a engage. Operation is restricted. Therefore, when the seedling box of the seedling box feeder 14 is empty, the seedling box 300
Is loaded, the seedling box 300 is once received and held by the manual feed claw 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. If the manual feed rod 70 is slightly lifted by operating the manual lever 73, the bent end portion 76a of the stopper arm and the projection 70a are disengaged, and the manual feed rod 70 becomes free. It becomes possible.
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. Thus, the stopper arm 76
However, it functions as a seedling box sensor that detects that the seedling box 300 has disappeared on the side closer to the seedling box conveying device than the portion where the seedling pushing device 16 of the seedling box conveying unit 22 acts. The stopper arm (seedling box sensor) 76, the connecting rod 91 and the switching stopper 90 constitute an automatic seedling box supply means.

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 removing 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 fits into the concave portion 145a of the seedling hitting cam 145, the operating nut 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), the seedling pushing device 16 pushes out the seedlings from the seedling box, 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 removing parts 140a,.
Are linearly inserted into the recesses 125a,.
The seedling removal from the seedling holder 125 is performed favorably. Further, when the seedling holder 125 reaches the point G, the seedling striking arm 141 moves downward, and strikes the seedlings pushed out from the concave portions 125a onto the seedling transport belts 19, 19. In this way, if the seedling removing arm 140 and the seedling hitting arm 141 are separated from each other, the seedling does not adhere to the arm at the time of hitting the seedling, and the seedling is reliably dropped on the seedling transport belt 19.

As described above, the seedlings are extracted from the seedling holder 125 by directly using the rotational force of the parallel link device, so that the seedlings can be reliably removed. In addition, by one operation of rotating the seedling holder 125, the seedling is transported from the upper seedling receiving position (E) to the lower seedling release position (FG), and from the seedling holder 125. Since the seedling removal is performed, the structure of the seedling delivery device 17 is simple.

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,
R) transports the seedlings one by one to the seedling collecting position T1 of the planting device 12 one by one. A guide plate 153 is provided below the seedling collecting position T1 for guiding the seedlings to the field when planting by the planting device 12.

The planting device 12 includes a rotary case 160 having a circular shape in a side view, and a pair of spatula-shaped planting 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 by 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 attached to 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. Further, a gear 175 is formed on the arm 174, and the gear 174 meshes with a gear 178 mounted on the planted rod mounting shaft 177. The planting rod 161 is fixed to the planting rod mounting shaft 177 by cotter pins 179 in a fixed state.

When the planting device mounting shaft 163 rotates in a predetermined direction, the rotary case 160 integrated therewith also rotates, and the planting rod 161 moves while drawing a closed locus T (see FIG. 23). At this time, the arms 174 swing by the rollers 172 and 172 moving along the guide grooves 168a of the implanted rod operating cam 168, and the swing is caused by the gears 175 and 175.
It is transmitted to the planting rod mounting shaft 177 via 178. For this reason, the angle of the planting rod 161 changes slightly during movement. That is, when passing through the seedling collecting position T1, it is in a horizontal state, and is parallel to the seedling 310 supplied to the seedling collecting position T1 by the seedling conveying belt 19. Then, the seedling is rotated downward while maintaining its posture with respect to the rotary case 160, and guided through the guide plate 153 to the planting position T2. After the planting, the posture is changed so that the planting rod 161 is rotated forward with respect to the rotary case 160, so that the planting rod 161 operates as if it were pulled out directly above. The attachment 161 is separated from the seedlings without difficulty, and the posture of the planted seedlings 310 is not disturbed.

The transmission case 10 is provided with a total of three transmission cases 180,... Shared by two sections, and the rear ends of these transmission cases are connected by a cylindrical housing 181. The planting device transmission chain cases 182,... Extend rearward.
The input portion 10b is separate from the main body portion 10a, and the rotational power of the input shaft 185 transmitted from the riding type vehicle 2 is first input to the input portion 10b, and the power is transmitted from the input portion by the main shaft 186. Are transmitted to each of the mission cases 180,... Of the main body 10a.

Next, the internal structure of the transmission case 10 will be described (see FIGS. 17 and 18). The input portion 10b is transmitted from the input shaft 185 to the main shaft 186 by a pair of bevel gears 190 and 191. A safety clutch is provided at this position. That is, the gear 190 is rotatably fitted to the input shaft 185, and the input shaft 185 and the gear 190 are transmission-coupled via the clutch body 192. The clutch body 192 is slidable with respect to the input shaft 185, and the clutch 192 is pressed toward the gear 190 by the spring 193, so that the transmission pawls 190 of the two are engaged.
a, 192a engage each other. For this reason,
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. Tube 195 receiving spring 193
Is shifted by the shifter 196 in a direction away from the clutch body 192, the transmission is stopped regardless of the magnitude of the load. The length of the key groove 191a of the bevel gear 191 is
The length of the bevel gear is longer than the length of the bevel 98 so that the bevel gear can slide axially within a predetermined range with respect to the main shaft 186.

As described above, the input section 10b is connected to the main body section 10a.
, The position of the input unit can be shifted along the main shaft 186, and the angle can be set arbitrarily. Thus, the degree of freedom in designing the transmission system from the riding vehicle 2 to the input shaft 185 is reduced. Is getting higher. For this reason, the input unit 10a can be shared by models having different positions of the PTO shaft on the riding type traveling vehicle side. Further, since the safety clutch is a single unit, adjustment and testing of the torque setting can be easily performed. In actual use, the input unit 10b is fixed to the central transmission case 180 (C) with fixing bolts 188 in order to prevent displacement. The attachment and detachment of the input unit 10b is easy.

In the transmission case 180, the main shaft 18 is provided.
6, a camshaft 200 that is transmitted from the main shaft and constantly rotates in a constant direction, a seedling transfer drive shaft 201 that is cam-driven by the camshaft and intermittently repeatedly rotates, a seedling box feed drive shaft 202, and a seedling. An extrusion drive shaft 203 is supported. In FIG. 17, 205 is a seedling transfer cam, 206 is a roller contacting the same, 207 is a seedling feed cam, 208 is a roller that contacts it, 209 is a seedling pushing cam, and 210 is a roller that contacts it. 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.

The gear 21 is connected from the main shaft 186 to the camshaft 200.
2, 213, at which a planting clutch is provided. That is, the gear cylinder 214 integrally formed with the gear 212 is rotatably fitted to the main shaft 186, and the clutch body 216 is fitted non-rotatably and slidably around the outer periphery of the gear cylinder. Body and claws 21
A pawl cylinder 217 that is driven and connected by 6a and 217a is fitted to the main shaft 186. The clutch body 216 has a tapered surface 216b. When the clutch pin 218 is pressed against the tapered surface 216b, the clutch body 216
7 away from the clutch. At that time, the clutch body 2
The clutch is disengaged when the angle of 16 becomes a predetermined angle. As described above, the automatic seedling box feeding device 15, the seedling pushing device 16, the seedling transfer device 17, and the seedling removing device 18 are designed to engage and disengage the clutch in units of two lines. Stopped in position.

A total of three planting drive shafts 220,... Shared by two rows are supported in the cylindrical housing 181. Each planting drive shaft 220,. Have been. Both ends of each planting drive shaft 220 are located at the bases of the planting device transmission chain cases 182 and 182. On the other hand, the planting device mounting shafts 163 and 163 are supported at the rear ends of the chain cases 182 and 182, and the sprocket wheels 221 and 221 mounted on both ends of the planting drive shaft 220 and the planting device mounting shafts are provided. 163,1
63, sprocket wheels 222, 222
Chains 223 and 223 are stretched between them. Also,
The planting drive shaft 220 is driven via bevel gears 226, 226, 227, 227 to two seedling transport belt drive roller shafts 225, 225 provided in a direction orthogonal to the plant drive shaft 220. As described above, when the power is directly transmitted from the planting drive shaft 220 to the drive roller shaft 225,
The difference in operation timing between the planting device 12 and the seedling transport belt 19 is reduced, which is advantageous in maintaining planting accuracy.

From the main shaft 186 to the planting drive shaft 220, a gear 229 formed integrally with the gear cylinder 214 and the planting drive shaft 2
Since the transmission is carried out by the gear 230 fixed to 20, the planting device 12 and the seedling transport belt 19 also engage and disengage the clutch in units of two lines. When the clutch is disengaged, these devices are stopped at fixed positions. You. As is clear from FIG. 16, the mission cases 180,... Are provided at positions closer to the front than the seedling box feeder 14, and the seedling supply devices 15, 16,.
17, 18, and 19 and various members for driving the planting device 12 are provided. Further, the seedling transport belt 19 is disposed so as to be sunk under the seedling box feed stand 14, so that the position of the planting device 12 can be brought forward. With this configuration, the overall length of the body is reduced, and
The center of gravity is located relatively forward, and the weight balance is good. Further, since the transmission members of the respective devices are housed in one transmission case 10 (excluding the input unit 10b), the structure is relatively simple, and the number of parts can be reduced. .

Planting device 12 and seedling supply devices 15, 1
FIG. 27 is a time chart showing the operation timings of 6, 17, 18, and 19 in a time chart. This figure means the following. (1) The “seedling picking positions” a1 to a7 indicate the timing at which the implantation rod 161 passes through the seedling picking position T1.

(2) The “implantation rod stop positions” b1 to b7
This is the timing at which the planting device 12 stops when the planting clutch is disengaged, and the planting rod 161 stops at a position slightly past the seedling collecting position T1. (3) “Seedling box feeding” indicates the operation of the automatic feeding claw 51, and c
1 starts the upward movement, c2 begins to disengage with the seedling box, c
The upward movement is stopped at 3, the downward movement is started at c4, and the downward movement is stopped at c5. When the feed claw 51 moves down, the seedling box is moved by one pitch.

(4) Regarding “seedling extrusion”, d1-d
The seedling pushing pin 100 protrudes between the two, and the seedling pushing pin 100 retreats between d2 and d3. (5) "Transfer of seedlings" indicates the operation of the seedling transfer arm 111, and the section between e1 and e3 rotates in the seedling transfer direction, and e3 and e4.
It stops during that time and rotates in the return direction at e4-e5. However, when rotating in the seedling transport direction, the speed is high in the first half (e1-e2) and slow in the second half (e2-e3). This is to ensure that the seedling removal device 18 removes and knocks the seedlings. In order to adjust the speed, the shape of the seedling transfer cam 205 is as shown in FIG. That is, the part e1-e for increasing the speed
2 is a portion e2 where the change in the cam diameter is made rapid and the speed is reduced.
-E3 moderates the change in cam diameter. O in FIG.
1 is the rotation center of the cam, O2 is the arc center of e1-e2, O
3 is the center of the arc of e2-e3.

(6) "Seedling" refers to the operation of the seedling arm 141, moves downward between f1 and f2, stops at the downward movement position between f2 and f3, and moves upward between f3 and f4. Since the downward movement of the seedling hitting arm is performed by the spring 146, the speed is high. The seedling holder 125 starts to return while the seedling hitting arm 141 is stopped at the downward movement position. However, since the seedling hitting arm 141 does not enter the path of the seedling holder 125 as described above, the two may come into contact with each other. There is no.

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 riding type traveling vehicle 2. Each of the floats 250 (L, C, R) has a wide front portion and a narrow rear portion, and is provided with groove forming devices 251 for forming grooves for transplanting seedlings on both left and right sides of the rear portion. The float 250 (L, C, R) is pivotally attached to the rear end of a float support rod 252 rotatably provided on the transmission case 10 up and down by a support pin (not shown), and the front part is enlarged and reduced. It is suspended by a link 255, and the front part moves up and down according to the unevenness of the paddy 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
Is the lower surface of the empty box collection unit and the seedling box feeder 1
4 and extends downward along the front part of the seedling box feeder 14.
The fertilizer discharge port 263 extends rearward through the space between the lower end and the transmission case 10, 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 working position shown in FIG. 1 and the riding type traveling vehicle 2 is started.
The planting unit 3 and the fertilizer applicator 4 are driven, and fertilizer is supplied to a seedling-planting groove formed in the field scene with progress, and the seedling is planted immediately thereafter. In particular, a switching stopper 90 for locking the seedling box 300 is provided in the upper seedling box mounting portion 21 (A), and the seedling box conveying portion 22 is located on the upper side of the seedling box conveying device with respect to the portion where the seedling pushing device 16 operates. When the seedling box 300 of the stopper arm 76 provided in the apparatus is detected to be gone, the switching stopper 90 is switched to supply the seedling box 300 of the seedling box mounting part 21 (A) to the seedling box transport part 22. Since the means is provided, if the seedling box 300 is placed on both the upper seedling box placing part 21 (A) and the lower seedling box placing part 21 (B) at the start of the operation, the seedling box 300 is automatically placed. Seedling box 30 of each seedling box mounting part 21 (A) / 21 (B)
0 is automatically supplied to the seedling box transport section 22 in sequence, so that seedling planting work can be performed very efficiently and with good workability.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter according to one embodiment of 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 an explanatory diagram of a seedling delivery cam.

FIG. 27 is a time chart showing the operation timing of each operation unit.

FIG. 28 is a plan view of a seedling box.

29 is a view as viewed in the direction of the arrow D in FIG. 28.

FIG. 30 is an enlarged plan view of a seedling raising pot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Riding type traveling vehicle 3 Planting part 4 Fertilizer application device 5 Link device 10 Transmission case 12 Planting device 14
Seedling box feeder 15 Seedling box automatic feeder 16
Seedling pushing device 17 Seedling delivery device 18
Seedling removal device 19 Seedling transport belt 21 (A)
Upper seedling box mounting part 21 (B) Lower seedling box mounting part 2
2 Seedling box transport section 76 Stopper arm (seedling box sensor) 90
Switching stopper 300 Seedling box 310
Seedling

Claims (1)

(57) [Claims] 1. A plurality of seedling box mounting portions 21 (A) 21
(B), the lower side of the seedling box conveyance constitutes a conveyance path for conveying the seedling box 300 by contacting the start end of the seedling box conveying part 22, and the seedling pushing device 16 in the seedling box conveying part 22 causes the seedling box 300 to move. A seedling box transporting the seedling box,
One seedling box mounting part 21 that supplies the seedling box 300 to the part 22
On the other hand, the seedling box is placed on another seedling box placing part 21 (A) .
The seedling box 300 on the section 21 (A) is supplied to the seedling box transport section 22.
Provided with a switching stopper 90 to lest locking, seedling box 300 of seedling box sensor 76 seedling pushing device 16 of the seedling box conveyance unit 22 is provided in the seedling box transport upstream side than the site of action
Is detected, the switching stopper 90
The seedling box 300 is locked by the switching stopper 90
A seedling plant comprising an automatic seedling box supply means for supplying the seedling box 300 of the seedling box placing section 21 (A) to the seedling box transport section 22.