JPH0750911A - Seedling-supplying apparatus - Google Patents

Abstract

PURPOSE:To prevent the currying back of seedlings on returning of a seedling pushing-pin and the falling-off of seedlings from a seedling holder in a seedling- supplying apparatus provided with the seedling pushing-pin which is inserted into a pot of a seedling box and pushes out seedling from the seedling box through an opening formed at the bottom of the seedling box and a seedling holder holding the pushed-out seedlings and transferring them to a specified position. CONSTITUTION:A seedling holder is provided with a seedling catching roller 128 having peripheral protrusions which cut into the bed soil part of the seedling pushed into the seedling holder and capable of rotating in the seedling-pushing direction (A4-direction) but unable to rotate in the reverse direction (B-direction) so that the carrying back of seedlings on returning of a seedling pushing-pin and the falling-off of the seedling from the seedling holder to the bed-soil side are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling supply device provided in a transplanter such as a rice transplanter configured to be loaded in a planting section together with a seedling box.

[0002]

2. Description of the Related Art Seedlings grown in a flexible seedling box are loaded into a planting section together with the seedling box, and the seedling box is transported along a predetermined transport path, while the seedling box is being transferred. Insert the seedling extrusion pin into the pot of the seedling box through the hole formed in the bottom and push out the seedling from the seedling box, the seedling holder receives the pushed seedling and moves it downward, and puts the seedling on the seedling conveyor belt. There is a rice transplanter configured to carry seedlings laterally by a carrying belt and to feed the seedlings one by one to the seedling picking position of the implantation rod.

[0003]

In the seedling feeding device of the rice transplanter, when the seedling pushing pin pushes the seedling out of the seedling box, the seedling holder stands by on the upper surface side of the seedling box (the side with the seedling leaves). Cage,
The bed soil of the extruded seedling was pushed into the seedling holder, but when the seedling extruding pin returned, the seedling was sometimes brought back and the seedling sometimes fell out of the seedling holder. The present invention aims to prevent this.

[0004]

In order to solve the above problems, the present invention has the following constitution. That is, the seedling supply device according to the present invention is inserted into the pot of the seedling box through the hole formed in the bottom of the seedling box, the seedling pushing pin for pushing the seedling out of the seedling box, and holding the pushed seedling at a predetermined position. In a seedling feeding device having a seedling holder to be transferred to the seedling holder, a protrusion that bites into the soil of the seedling pressed into the seedling holder is formed on the outer peripheral portion, and rotates in the seedling pushing direction by the seedling pushing pin. However, the seedling holder is provided with a seedling catching roller that does not rotate in the opposite direction.

[0005]

When the seedling is pushed into the seedling holder with the leaf first, the protrusions of the seedling catching roller bite into the surface of the bed soil of the seedling, and the seedling is held in the seedling holder. This seedling catching roller rotates in the seedling extrusion direction by the seedling extrusion pin, but does not rotate in the opposite direction, so
When the seedling push-out pin returns, the seedling does not fall from the seedling holder to the soil side and the seedling push-out pin does not take the seedling back. In addition, the seedlings do not fall to the soil side when the seedling holder moves downward.

[0006]

Embodiment 1 FIGS. 1 to 24 show an embodiment of the present invention. The transplanter 1-1 has a traveling section 2 which is a four-wheeled vehicle 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.
The planting section 3 is mounted on a parallel link type planting section mounting device 5 provided on the rear portion of the main body 2 which is a traveling vehicle body, and is vertically movable with respect to the main body 2. The planting part mounting device 5 is moved up and down by a hydraulic cylinder 6.

The planting unit 3 is a system for loading seedlings together with a seedling box, and a transmission case 10 which also serves as a planting unit frame, a planting device 12 for the number of planting lines, and a seedling taking position of the planting device. 1 seedling
Each device for supplying seedlings for supplying each plant is assembled. Each device for supplying seedlings is a seedling box feeding base 14, a seedling box automatic feeding device 15 provided on the seedling box feeding base, and a seedling pushing device 16 for pushing seedlings from the seedling box at the seedling pushing position of the seedling box feeding base 14. , A seedling delivery device 17 that conveys the seedlings extruded by the seedling pushing device downward, a seedling drop device 18 that assists the seedling delivery device, and a seedling receiving position of the planting device 12 for the seedlings received from the seedling delivery device 17. The seedling transport belt 19 and the like for transporting to.

The seedling box used has the structure shown in FIGS. 33 to 35. That is, in the seedling box 300, seedling raising pots 301, ... Opening to the top are arranged in a matrix in a vertical and horizontal direction, and seedling pushing holes 303 having three radial slits 302 are formed at the bottom of each pot. The seedling extrusion hole 303 also serves as drainage. Assuming that the longitudinal direction is vertical and the direction orthogonal thereto is horizontal, the pot interval is a constant pitch p in the vertical direction, and the boundary portion 306 in which the pot-to-pot interval is wide is provided in the center in the horizontal direction. The same number of pots (for example, 7 pots) are arranged on each side of the row at equal intervals. Therefore, the seedling-growing pots are divided into left and right groups with the strip-shaped boundary portion 306 interposed therebetween. Left and right edges of the seedling box are guide ears 307, and claw holes 308 having a square shape in plan view are formed at the ears at the same pitch as the vertical pitch p of the pot. A tip portion 309 of the ear portion 307 is bent downward at a substantially right angle. The seedling box 300 is integrally formed of a thin synthetic resin material and has flexibility in the front-rear direction and the left-right direction as a whole. Floor soil is put in the pots 301, ..., Seeded, and grown until the grown seedlings 310 have a certain size.

Each part of the planting part 3 will be described below.

The seedling box feed base 14 is shared by two articles, and a total of three feed boxes 14 are provided in parallel. Each seedling box sending base 14 includes a seedling box placing section 21, a connecting section 22, a seedling box carrying section 23, and an empty box storing section 2.
It consists of 5. The seedling box mounting portion 21 has a two-stage structure, and the upper and lower seedling box mounting portions 21 (A, B) are provided in parallel in a state of being inclined so that the front side is positioned higher. Connection part 22
(A, B) connects the rear ends of the upper and lower seedling box placing portions 21 (A, B) and the starting end of the seedling box transporting portion 23. The seedling box transporting section 23 has a substantially U-shape in a side view, the rear end of the U-shape is the start end of the seedling-box transfer, and the front end of the U-shape is the end of the seedling-box transfer. . The empty box storage unit 25 is provided on the front side of the terminal end of the seedling box transport unit 23 and has a space in which a plurality of empty seedling boxes can be stacked and held.

The flow of the seedling box during the planting work will be described. The seedling box 300 placed on the seedling box placing section 21 is supplied to the seedling box carrying section 23 through the connection section 22 and is supplied. The seedling box 300 is intermittently conveyed by 1 pitch p from the start side to the end side by the automatic seedling box feeder 15.
Since the seedling box 300 has flexibility, it can be transported along a curved transportation path. At the seedling pushing position 27 during transportation, the pot seedlings in the seedling box are pushed backward by the seedling pushing device 16. The seedling box after the seedlings have been pushed out is discharged forward from the terminal end of the seedling box transport unit 23 and is collected in the empty box storage unit 25.

The upper and lower seedling box mounting portions 21 (A, B) both have six seedling box mounting surfaces in the left-right direction, and the entire seedling box mounting portion 21 slides left and right to cover two adjacent surfaces. The seedling box is supplied to the seedling box transport unit 23. The sliding mechanism of the seedling box mounting portion 21 includes a rack 30 mounted on the rear surface of the seedling box mounting portion 21 in the left-right direction, and a pinion 31 that meshes with the rack 30.
And a motor 32 for rotating the pinion in forward and reverse directions.

A shutter 3 is provided at the front end of the connecting portion 22.
4 (A, B) are provided, and by opening and closing the shutter appropriately, the seedling boxes of the upper seedling box mounting portion 21 (A) and the seedling box of the lower seedling box mounting portion 21 (B) are alternated. And is supplied to the seedling box carrying section 23.

The upper seedling box placing portion 21 (A) is the front end portion 3
6 is formed separately from the main body, and its front end portion 36 is connected to the main body by a hinge 37 so as to be vertically rotatable, and is further urged upward by a torque spring (not shown). The front end portion 36 has a plate-shaped detent 3 extending rearward.
6a is formed, and the detent portion 36a hits the upper surface of the main body, so that the main body and the front end portion 36 are always located on the same plane.

This is a structure for easily supplying seedlings to the seedling box placing section 21 (B) in the lower stage, and the seedlings are supplied in the following procedure (see FIG. 8). First, the seedling box 300 is placed on the upper seedling box placing portion 21 (A) (a), and the seedling box 300 is pulled forward until the rear end comes over the front end portion 36 (b). Then, due to the weight of the seedling box 300, the front end portion 3
6 rotates downward, and the seedling box 300 is placed in the lower seedling box mounting portion 21.
It is dropped on (B) (c). If the seedling box 300 is disengaged from the front end portion 36, the front end portion 36 returns to its original state by the action of the torque spring (d). Therefore, the seedling box dropped on the seedling box mounting portion 21 (B) in the lower stage. Just push the 300 backwards. The flexible seedling box used in this machine, when it has one end, hangs down so that the other end becomes almost vertical. For this reason, conventionally, it was not easy to supply seedlings to the seedling box placing portion 21 (B) in the lower stage, but if the seedling box placing portion 21 is configured as in this embodiment, seedling feeding can be performed relatively easily. And work efficiency is improved.

The automatic seedling box feeding device 15 has a structure shown in FIGS. 9 to 12. Reference numeral 44 is a bottom plate, and 45 is a holding metal fitting, which guides the seedling box by sandwiching the ear portion 307 of the seedling box with both of them. At the bottom of the presser fitting 45,
A vertically long rectangular opening 45a is formed.

Reference numeral 50 denotes an automatic feed rod, which has an automatic feed pawl 51 which is inserted into the opening 45a of the pressing member 45 and engages with the lower wall surface of the pawl hole 308 of the seedling box. This automatic feed rod 50
It is attached to a roller shaft 54 provided at the tip of the swing arm 53 in a state of being biased toward the seedling box path side via a torque spring 55, and the swing arm 53 swings around a support shaft 57. It is designed to move up and down with it. When the automatic feed rod 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 the seedling feeding rod 58.

A stop bar 60 is inserted into the opening 45a and is engaged with the upper wall surface of the claw hole 308 of the seedling box.
Have. The restraining rod 60 is pivotally supported by a support shaft 62 while being urged toward the seedling box path by a torque spring 63. The sliding contact portion 60a at the lower portion of the stop rod 60 has the roller shaft 5
When the swing arm 53 moves upward, the stop rod 60 is pushed to the right and the stop claw 61 is disengaged from the claw hole 308. Further, a seedling feeding stop concave portion 60b is formed on the upper side of the sliding contact portion 60a, and the seedling feeding lever 64
When the swing arm 53 is rotated to the maximum by operating, the roller shaft 54 fits into this recess 60b, and the stop claw 6
1 is fitted in the claw hole 308.

A leaf spring brake 65 has a hook portion 65a.
Engaging with the claw hole 308 has an effect of preventing the seedling box from dropping due to its own weight.

FIG. 9 shows a state in which the swing arm 53 swings downward, in which the automatic feed claw 51 of the automatic feed rod 50 and the stop claw 61 of the stop rod 60 are fitted in the opening 45a.
The stop claw 61 receives the upper wall surface (the lower end surface of the seedling box in the initial state) of the claw hole 308 of the seedling box and holds the seedling box 30.
0 is held stationary.

FIG. 10 shows a state in which the swing arm 53 is swung upward, and 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 part of the stop rod 60 is pushed rearward by the roller shaft 54, and the stop claw 61 is also removed from the claw hole 308. By the action of the leaf spring brake 65, the seedling box 300 is held in the same position.

When the swing arm 53 rotates downward from the state shown in FIG. 10, the automatic feed claw 51 of the automatic feed rod 50 fits into the claw hole 308 as shown in FIG. At this point, the stop claw 61 of the stop rod 60 is still out of the claw hole 308. When the swing arm 53 further rotates in this state, the automatic feed claw 51 pushes down the lower wall surface of the claw hole 308 to convey the seedling box 300 by one pitch p. The seedling box at the top falls by its own weight. When the swing arm 53 rotates to the bottom dead center, the regulation by the roller shaft 54 is released, the stopper claw 61 fits into the claw hole 308, and the state shown in FIG. 9 is restored.

Further, as shown in FIG. 12, when the seedling feeding lever 64 is operated to pivot the swinging arm 53 to the upper side, the roller shaft 54 fits into the seedling feeding stop recess 60b,
Since the restraining claw 61 comes to fit into the claw hole 308, the seedling box is supported while the feeding of the seedling box is stopped. If the seedling box is not sent, seedlings will not be supplied to the seedling picking position, so
Seedlings cannot be planted on the paddy field. In other words, it is possible to stop planting of seedlings in units of two rows, and the automatic seedling box feeder 15 functions as a ridge clutch. Since this ridge clutch does not require a special member for the clutch, the structure is simple and can be manufactured at low cost.

The seedling extruding device 16 includes the seedling box feed base 14 described above.
Is provided with a predetermined number (14 in the illustrated example) of seedling extruding pins 100, which push out the seedlings backward one row at a time from the seedling box located at the seedling pushing position 27. Seedling extrusion pin 10
0, ... are supported by a common support 101, and when the seedling pushing rods 102, 102 connected to both ends of the support are moved back and forth, the seedling pushing pins 100 ,. The push pin is inserted into the seedling pushing hole 303 of the seedling box to push the seedling in the pot 301 backward.

The connecting portion between the support 101 and the seedling pushing rod 102 is inserted from the outer side of the support 101, and the tip of the fixing pin 104 biased inward by the spring 103 is connected to the pin of the seedling pushing rod 102. It has a structure fitted in the hole 102a. Therefore, the tip is pin hole 102.
By pulling out the fixing pin 104 until it is disengaged from a, the support 101 can be manually slid along the seedling pushing rod 102. Seedling extrusion pin 100, ...
When the support part 101 is slid forward (in the direction opposite to the seedling box) by the above method when the planting part is stopped in the state where the seedling box 300 is inserted into the seedling box 300, the seedling pushing pins 100 ,. It becomes possible to feed the seedling box by pulling out. Support 10
If the planting part is operated while sliding 1
The support 101 is pressed against the backward movement of the seedling pushing rod 102 by the frame of the seedling box feeding stand 14 and is held in that position. Then, when the positional relationship between the support 101 and the seedling pushing rod 102 becomes normal, the spring 103
By this action, the tip of the fixing pin 104 enters the pin hole 102a, and the support 101 and the seedling pushing rod 102 are fixed again in the normal state.

The drive mechanism for the seedling pushing rod is constructed as follows. In FIG. 14, 105 is a gear case,
The base of the seedling pushing rod 102 is slidably supported in the gear case 105. A rack 106 is formed at the base of the seedling pushing rod 102, and a fan-shaped pinion 107 that meshes with the rack is provided in the gear case 105. Pinion 1 in the left and right gear cases 105, 105
07 and 107 are attached to a common shaft 108, and the swing arm 1 fixedly attached to one end of the shaft 108.
09 and a drive arm 1 attached to a second drive shaft 212 described later.
10 and 10 are connected by a buffer connector 112. The buffer coupling body 112 slidably fits the tubular body 113 on the swing arm 109 side and the rod 114 on the drive arm 110 side, and the flange 115 fitted to the intermediate portion of the rod 114 and the upper and lower sides of the tubular body 113. Springs 116 and 117 are interposed between the wall and the wall.

When the drive arm 110 rotates in the direction of the arrow from the position shown in the figure, the force pushing up the rod 114 is applied to the spring 11.
6, the swing arm 109 is rotated upward, the pinion 107 is further rotated clockwise, and the seedling push-out pins 110, ... Drive arm 1
When the rotation of 10 exceeds the dead center, the spring 11 that has been compressed
6 repels, the buffer coupling body 112 contracts, the swing arm 109 pivots downward, and the pinion 107
Rotates counterclockwise, and the seedling push-out pins 110, ... Retreat. That is, the protrusions of the seedling pushing pins 110, ... Are forcibly driven via the springs 116, which are cushioning materials, and the receding of the seedling pushing pins 110 ,. When the seedling extruding pins 110, ... Retreat to a predetermined position, the flange 115 causes the step portion 113 of the cylindrical body 113.
The downward movement of the rod 114 after engaging with a is absorbed by the spring 117, and the seedling pushing pin 11
0, ... overstroke is prevented.

The seedling delivery device 17 has a common support shaft 121.
A pair of left and right links 1 whose bases are supported by a and 122a
21, 121, 122, 122, and connecting shafts 121b, 121b, 122b, 122b at the tips of the pair of links.
A parallel link device is configured with the brackets 123, 123 connected by
Seedling holder 12 for holding seedlings extruded from the seedling box during
5 are provided. By operating the parallel link device, the seedling holder 125 is vertically rotated while maintaining a fixed posture,
It is designed to transfer seedlings downward.

The seedling holder 125 is used for the bed soil 31 of the seedling 310.
0a is provided with a holding recess 126, whose upper part is open to the extent that it fits exactly, and which is pushed out from the seedling box by the seedling pushing pin 100 ,.
.. are pushed into the holding recesses 126 ,. Groove 1 formed at the bottom of each holding recess 126
27 is provided with a seedling catching roller 128 having sharp projections 128a, ... On its outer peripheral portion, and the projection 128a located on the upper side thereof projects into the holding recess 126.
A one-way clutch 130 is provided on a common support shaft 129 to which the seedling catching rollers 128, ... Are attached, and each seedling catching roller 128 ,. It rotates in the moving direction (direction A in FIG. 18) but does not rotate in the opposite direction (direction B).

The drive mechanism of the seedling delivery device 17 connects the swing arm 131 attached to the support shaft 122a of the lower links 122 and 122 and the drive arm 132 attached to the second drive shaft 212 with the buffer rod 133 to drive them. Arm 13
2 is rotated in a fixed direction to swing the swing arm 131. The buffer rod 133 includes a swing arm side rod 133a and a drive arm side rod 133b.
The two are configured to transmit force via a spring 134. The links 135 and 136 in FIG.
2 is a stopper that regulates the vertical rotation range of 2. Further, along the movement path of the seedling holder 125, holder guides 137, ... For preventing the seedling from deviating from the holding recesses 126, ... Of the seedling holder 125 to the soil floor side are provided. This holder guide can be made of wire for each holding recess, or
It may be made from a single sheet of material.

By the action of the drive mechanism, the pair of left and right links 121, 121, 122, 122 swing up and down, and the seedling holder 125 causes the seedling receiving position (E) and seedling releasing position (FG) in FIG. Move between. Seedling holder 125 is F-
When it is at the midpoint of G, the connecting shaft 121 is directly below the support shafts 121a and 122a, which are the pivots of the links 121 and 122.
Since b and 122b are positioned, the seedling holder 125 moves forward substantially horizontally between FG.

The seedling dropping device 18 has a seedling dropping tool 141 attached to the L-shaped arm 140. This seedling dropper 141 has a tip with a holding recess 12 of the seedling holder 125.
6, so that it can be inserted into the seedlings, and a seedling removing portion 141a for receiving the bottom portion of the seedbed soil portion 310a and a seedling tapping portion 141b abutting on the upper side surface of the seedbed soil portion 310a are formed at the tip end thereof. .

The L-shaped arm 140 is rotatably supported by the support shaft 143. Then, a seedling dropping cam 144 is provided in the vicinity thereof, and a cam roller 145 contacting the outer peripheral surface of the cam is attached to an appropriate position of the L-shaped arm 140. The L-shaped arm 140 is biased by a spring 146 toward the cam 144. The cam 144 has a concave portion 1 in a part of the circumference.
The cam roller 145 has a shape in which 44a is formed.
Spring 146 only when the spring falls into the recess 144a.
The seedling drop tool 141 is momentarily moved downward by the force of. The cam 144 is also attached to the second drive shaft 212.

When the seedling holder 125 is at the seedling receiving position (E), the seedling pushing device 16 pushes the seedling out of the seedling box, and the seedling is held in the holding recesses 126, ...
Be pushed into. The protrusions 128a of the seedling catching roller 128 bite into the floor soil portion 310a of the pressed seedlings, and the seedlings are held in the holding recesses 126. Since the seedling catching rollers 128 do not rotate in the direction opposite to the seedling pushing direction (direction B), the seedling pushing pins 100, ... Do not bring the seedlings back when returning to the original state,
The seedlings are securely held in the holding recesses 126, .... Then, the seedling holder 125 holding the seedling is in the release position (FG).
Rotate to. Even during this rotation, the seedlings of the seedling holder do not fall out to the soil floor side.

When the seedling holder 125 moves from the point F to the point G, the seedling removing parts 141a, ... Of the seedling dropping tool 141 are inserted into the holding recesses 126 of the seedling holder, and the seedlings held in the recesses are relatively moved. Is pulled out backwards. Since the seedling catching roller 128 can rotate in the seedling pushing direction (direction A), the seedling can be pulled out rearward from the seedling holder 125. As described above, the seedling holder 125 is FG
Since it moves to the front almost horizontally between the seedlings,
.. are linearly inserted into the recesses 124a, .., so that the seedlings can be removed from the seedling holder 125 satisfactorily.
Further, when the seedling holder 125 reaches the point G, the seedling dropping tool 141 moves downward, and the seedling tapping portions 141b, ... Push the seedlings pushed out from the holding recesses 126 ,.
Hit it on top of 19.

25 and 26 show different embodiments of the seedling holder. The seedling holder 125 'is provided with a drive arm 280 for forcibly driving the seedling catching roller 128 in the seedling pushing direction during seedling pushing. Reference numeral 130 denotes a one-way clutch of the support shaft 129. The one-way clutch 130 supports the support shaft 129 so that the support shaft 129 rotates in the A direction but does not rotate in the B direction. Thirteen
Reference numeral 0'denotes a one-way clutch of the drive arm 280.
Rotates the support shaft 129 in the A direction, but idles in the B direction.

The drive arm 280 is a seedling pushing pin support 1
Driven by a drive pin 281 protruding rearward from the central portion of 01. When the drive pin 281 projects rearward during the seedling extrusion, the drive arm 280 is pushed by this and the drive arm 280 rotates in the A direction, and the seedling catching roller 128 also rotates in the A direction. In this way, since the seedling catching roller 128 is forcibly rotationally driven in the seedling pushing direction in synchronization with the seedling pushing timing, the seedling 310 is surely pushed into the holding recess 260 and the seedling catching roller 128 has projections 128a ,. Can easily bite into the seedbed soil portion 310a without damaging the seedling. A hole (shown by a chain line in FIG. 33) 282 through which the drive pin 281 penetrates is formed in the boundary portion 306 of the seedling box 300.

When the drive arm 280 is no longer pressed by the drive pin 281, the drive arm 280 is moved to B by the return spring 285 attached to the return arm 284.
It is rotated in the direction and returns to the original state. Drive arm 28
Since 0 rotates around the support shaft 129 in the B direction, the seedling catching roller 128 does not rotate in either the A or B direction during this returning operation.

The seedling drop tool 141 is used as a seedling holder 125.
Seedling catching roller 128
Is configured to be driven to rotate in the A direction,
The seedling is reliably extracted, and the seedbed soil portion 310a is not collapsed during the extraction, which is preferable.

27 to 32 show still another seedling holder. This seedling holder 125 "consists of two plates 2
87 and 288 are provided side by side in front and rear, and a plate member 287 on the front side is provided.
The left R member 28 that constitutes the left side portion of the holding recess 260.
.. are fixed, and the holding recess 26 is formed in the rear plate member 288.
The right R member 290, ..., Which constitutes the right side portion of 0, is fixed. The rear plate member 288 is slidable to the left and right, and when the plate member slides to the right, the left and right R members 289, 290
Is wide, and when the plate material slides to the right, the right and left R members 289 and 290 provide an interval for exactly sandwiching the bed soil portion of the seedling from the left and right.

The mechanism for opening and closing the seedling holder 125 "is constructed as follows. The front and rear plate members 287, 281 are engaged with each other by the ridges 287a and the grooves 288a, and the both are not separated vertically but left and right. It is designed to slide on. 2
Reference numeral 91 denotes a rotating body having a first arm 291a extending in the left-right direction and a second arm 291b extending rearward, and the rotating body 291 is attached to an upper end portion of a rotating shaft 292 provided on a plate member 287 on the front side. And the second arm 291b
A pin 294 fixed to the plate member 288 on the rear side is loosely fitted in the long hole 293. A push rod 295 is fixed to the seedling pushing pin support body 101 by aligning the left and right positions of the first arm 291a, and the pushing rod 295 is synchronized with the seedling pushing operation by the seedling pushing pin 100 ,. Push backwards. Then, the second arm 291b is rotated to the left, the plate member 288 on the rear side slides to the left, and the seedling holder 1
25 "is closed to hold the seedlings pushed into the holding recess 260.

Numeral 296 is a tumbler spring, which is a third arm 291c which operates integrally with a pin 296a fixed to the front plate member 287 and the first arm 291a.
And a pin 296b fixed to the first arm 2
91a is pulled to the maximum while moving from the solid line position to the chain line position in FIG. Therefore, the holder open state in which the first arm 291a is in the solid line position and the holder closed state in which the first arm 291a is in the chain line position are stable.

Further, the release claw 297 is provided at a position substantially at the same level as the seedling dropping tool 141 and corresponding to the left and right positions of the rotating body.
Is provided. The release claw 297 is rotatably provided around the fulcrum O, but is prevented from rotating inward more than necessary by the stopper plate 297a and the stopper pin 297b, and is inwardly rotated by the torque spring 297c. Being energized. When the seedling holder 125 ″ moves to a position just before the F position, the tip tapered portion 298 of the release claw 297 comes into contact with the second arm 291b, and the second arm 291b moves inside as the seedling holder 125 ″ moves. The seedling holder 125 ″ is opened, and the seedling dropper 141 pulls out the seedlings from the seedling holder 125 ″ and knocks the seedlings downward.

The seedling conveying belt 19 has two adjacent strips (L,
R) form a set, and the pair of seedling conveying belts 19 (L, R) are symmetrical with each other. The seedling conveying belt 19 is stretched around a pair of rollers 150 and 151, and the belt is always moved in the direction of the arrow when the driving roller 150 rotates in a predetermined direction. Seventeen 14 seedlings transferred from the seedling transfer device 17 are placed on the upper surfaces of the left and right seedling transport belts 19 (L, R). Then, the seedlings are transferred to the seedling transport belt 19 (L,
R) conveys outward and seedling picking position T ₁ of planting device 12
Sequentially supply one seedling to each. Further, below the seedling picking position T ₁ , a guide plate 153 for guiding the seedlings to the field scene when planting by the planting device 12 is provided.

A pair of seedling conveying belts 19 (L, R)
A rotary brush 155 is provided on the lower side of the interval portion of, and nozzles 156 and 156 for discharging cleaning water toward the rotary brush 155 are further provided. The washing water is supplied from the water tank 157 provided in the machine 2 to the nozzle 156 by the hose 158. This cleaning device is for cleaning the mud adhering to the seedling conveying belt 19, and it is preferable to focus on the part that receives the bed soil of the seedling where mud is particularly likely to adhere. If a sensor 159 for detecting the presence or absence of the seedling box is provided in the seedling box transport unit 23 and the cleaning device is activated only when the seedling box is present, power and water are not wasted.

The planting device 12 comprises a rotary case 160 having a circular shape in 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. 22 and 23. In the figure, reference numeral 163 denotes a planting device mounting shaft supported at the rear end of the transmission case 10. A fixed metal 165 is fitted by a key 164 to the front end of the planting device mounting shaft, and a rotary metal is further attached to the stationary metal. The 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 formed around the planting device mounting shaft 163.
The rod actuating cam 168 having the above 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 that is rotatably fitted around a support shaft 173.
It is attached to 74. Further, a gear 175 is formed on the arm 174, and the gear 174 meshes with a gear 178 attached to a planting rod attachment shaft 177. The stud rod 161 is fixedly attached to the stud rod mounting shaft 177 by a cotter pin 179.

When the planting device mounting shaft 163 rotates in a predetermined direction, the rotary case 160 integrated with it also rotates, and the planting rod 161 moves while drawing a closed locus T (see FIG. 21). At that time, the rollers 172 and 172 move along the guide groove 168a of the implanting rod actuating cam 168, whereby the arm 174 swings, and the swinging thereof causes the gears 175 and 175 to swing.
It is transmitted to the implantation rod mounting shaft 177 via 178. Therefore, the implantation rod 161 slightly changes its angle during movement. That is, when passing through the seedling picking position T ₁ , it is in a horizontal state and is parallel to the seedling 310 supplied to the seedling picking position T ₁ by the seedling conveying belt 19. Then, the rotary case 160 is rotated downward while maintaining its posture, and the seedlings are guided to the planting position T ₂ through the guide plate 153. After the implantation, by changing the posture so that the implantation rod 161 rotates forward relative to the rotary case 160, the implantation rod 160 operates absolutely as if it were pulled out right above. The basil 161 and the seedling are separated without difficulty, and the posture of the planted seedling 310 is not disturbed.

The transmission case 10 includes three mission cases 180 arranged in parallel, ..., Four joint cases 18 added to the space and outer end of these mission cases.
1, ..., 4 chain cases 182 fixedly connected to the back surface of each joint case, ..
The rear portion of the transmission case 180, ... Has a tubular shape that projects to the left and right, and is fixedly connected to the joint case 181, ... With the tubular portions 180b, 180b. An input unit 183 is integrally formed with the central mission case 180 (C). Also, the central mission case 180
A rolling shaft 184 connected to the planting part attachment device 5 is rotatably supported at the front end of (C), and the entire planting part 3 is supported on the main body 2 so as to be capable of rolling.
Then, a total of six planting devices 12, one at each of the rear end portions on both sides of the center two chain cases 182 (2, 3) and the rear end portions of the left and right chain cases (1, 4) are provided. It is provided.

Next, the internal structure of the transmission case 10 will be described (see FIG. 24). Note that FIG. 24 is a developed cross-sectional view, and the orientations and positional relationships of the respective parts are different from the actual ones.

The PTO output of the machine 2 is input to the input shaft 185 in the input unit 183, and from the input shaft, the cylindrical parts 180b of the mission cases 180, ...
Is transmitted by a pair of bevel gears 190 and 191 to a first drive shaft 186 supported inside. This transmission is designed as a safety clutch. That is, the gear 190
Is rotatably fitted to the input shaft 185.
5 and the gear 190 are transmission-coupled via a clutch body 192. The clutch body 192 is slidable with respect to the input shaft 185, and the spring 193 allows the clutch body 1 to slide.
By pressing 92 toward the gear 190, the transmission claws 190a and 192a of both are engaged with each other. Therefore, when the load exceeds a certain level, the clutch body 192 disengages from the gear 190 against the pressing force of the spring 193,
The transmission is stopped. The cylinder body 195 receiving the spring 193 is moved in the direction away from the clutch body 192.
Shifting by 6 stops transmission regardless of the magnitude of the load.

The bevel gear 1 is attached to the first drive shaft 186.
91, sprocket wheel 2 for driving each planting device
00, ... and bevel gears 201 for driving the seedling conveying belts,
, And gears 202 for transmitting to each shaft in the mission case main body 180a ,. The first drive shaft 186 is composed of three shafts 186 (L, C, R) divided into two sections, and each shaft is connected by two sprocket wheels 200, 200 in the center. ing.

Chains 205, ... are stretched between the sprocket wheels 200, ... and the sprocket wheels 204, ... mounted on the planting device mounting shafts 163, ..., and the rotational power of the first drive shaft 186 is Each planting device 12,
It is always told to.

The bevel gears 201, ... Bevel gears 208 attached to the seedling conveying belt drive roller shafts 207 ,.
Are meshed with each other and are directly transmitted from the first drive shaft 186 to the seedling conveying belt drive roller shafts 207 ,.

The mission case 180 is a planting section drive case provided with a drive shaft for driving each section of the planting section 3,
In the mission case 180, the first drive shaft 186
A counter shaft 211, a second drive shaft 212, and a third drive shaft 213 are provided in parallel with. Then, the seedling pushing drive arm 11 is provided at both left and right ends of the second drive shaft 212.
0 and the seedling delivery drive arm 132 are separately attached, and the seedling drop cam 144 is attached near the outer surface of the case. Also, the third drive shaft 2
A seedling feeding drive arm 58a having a tip end portion connected to the seedling feeding rod 58 is attached to 13.

Two sets of gears 202, 21 are driven from the first drive shaft 186 to the second drive shaft 212 via the counter shaft 211.
5 and 216, 217 reduce the speed of transmission.
Further, the second drive shaft 212 is transmitted to the third drive shaft 213 by a cam drive, and the third drive shaft 213 is intermittently driven.
219 is a cam attached to the second drive shaft 212, and 220 is a cam roller supported by an arm 221 attached to the third drive shaft 213.

The gear 217 and the transmission portion of the second drive shaft 212 are provided with a ridge clutch 230 having the following structure. The gear 217 is rotatably fitted to the second drive shaft 212, and the clutch body 231 is fitted to the second drive shaft 212 in a non-rotatable and slidable manner so as to face the gear 217.
The 17 claw 217a and the claw 231a of the clutch body 231 are engaged with each other for transmission. Clutch body 23
Since No. 1 is biased toward the gear 217 by the spring 232, the clutch is normally engaged. When the clutch pin 233 is pressed against the tapered surface 231b of the clutch body 231, the claws 217a and 231a of the both are disengaged and the clutch is disengaged. At that time, the clutch is set to be disengaged when the clutch body 231 reaches a predetermined angle. Therefore, the automatic seedling box feeding device 15, the seedling pushing device 16, the seedling delivering device 17, and the seedling dropping device 18 are adapted to engage and disengage the clutch in units of two articles, and when the clutch is disengaged, each of these devices is in a fixed position. Be stopped.

Below the planting section 3, as a float for leveling, a center float 250 located at the center of the left and right sides.
(C) and a side float 250 (L, R) located behind the rear wheels of the machine 2 are provided. Each float 2
50 (L, C, R) has a shape that the front part is wide and the rear part is narrow, and groovers 251 for forming grooves for transplanting seedlings are attached to both left and right sides of the rear part. Float 250
(L, C, R) are pivotally attached to the rear end of a float support rod (not shown) rotatably provided in the transmission case 10 in the vertical direction, and the front portion is expanded and contracted. Link 2
It is hung by 55, and the front part moves up and down according to the unevenness of the paddy field.

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 is based on the vertical movement of the center float.
The spool 57 is switched, and the planting unit 3 is controlled to have a constant height with respect to the paddy field. Therefore, the planting depth of seedlings is always kept constant. By rotating the float support rod 252 to change the support height of each float,
The planting depth of seedlings can be adjusted.

The fertilizer application device 4 comprises a hopper 26 for storing fertilizer.
0 and a feeding device 261 for feeding the fertilizer in the hopper downward.
And a fertilizer pipe 262 for guiding the fertilizer fed from the feeder to a groove for planting seedlings.

At the time of planting work, a seedling box containing seedlings is loaded on the seedling box feed base 14, and the planting section 3 is lowered to the working position shown in FIG. 1 to start the machine 2. By driving the planting unit 3, the seedling box is transported along a predetermined transport path, and the seedling push-out pins 100, ... Push the seedling out of the seedling box in the middle of the transport, and push the pushed seedling into the seedling holder. 125 holds and transfers the seedlings downward, the seedling dropping tool 141 drops the seedlings held by the seedling holder 125 onto the seedling conveying belt 19, and the seedling conveying belt 19 further takes the seedlings one by one at the seedling picking position T. Supply to ₁ . Then, the seedlings supplied to the seedling picking position T ₁ are planted in the field scene by the planting rod 161.

[0061]

Second Embodiment FIGS. 36 to 38 show a different embodiment. In this transplanter 1-2, the fence 21a on the outer side of the seedling box placing section 21 is inclined obliquely downward, and the fence 21b on the inner side is inclined so that the center thereof is high, and the seedling box placing section 21 is seeded with seedlings. The box can be placed from the side, or by sending the seedling box along the outer fence 21a, the seedling box can be placed diagonally upward from just below the side to the seedling box placing section 21, Fence 21
The seedling box can be placed on the seedling placing portion 21 while being slid down along b, and the seedling supply work is easy. It is also possible to replenish seedlings while sitting in the cockpit.

[0062]

[Third Embodiment] The transplanter 1-3 shown in FIGS.
The seedling box mounting portion 21 is extended to the front end of the machine 2 so that a large number of seedling boxes can be loaded at one time. As shown in FIG. 42, the seedling box 300 ′ used in this transplanter has hooks 70, 70 having a V-shaped cross section at the front and rear ends thereof, and the hook 70 of the front seedling box 300 ′ (1) is provided with a rear portion. By inserting the hook 70 of the side seedling box (2), both seedling boxes 300 '(1, 2) can be connected to each other in the front and rear direction. In this way, a plurality of seedling boxes are connected in a daisy chain and placed on the horizontal portion 21-1 of the seedling box placing portion 21, and the seedling box transfer device 7
1 transfers the seedling box to the rear one by one. Seedling box transfer device 7
For example, the gear 1 driven by a constant load motor may be engaged with the claw holes 308 of the seedling box to transfer the seedling box.

After the rear end portion of the horizontal portion 21-1, as shown in FIG. 41, the rails 72, 72 sandwich the ears 307, 307 to guide the seedling box 300 '. When the seedling box 300 ′ reaches the seedling box mounting portion 21 on the sloped portion 21-2, the rear end portion (relative to the traveling direction) of the seedling box 300 ′ is lifted to disconnect the seedling box, and thereafter separated. The seedling boxes are dropped one by one to the seedling box transporting section 23 by their own weight and are transported by the seedling box feeder 15.

Further, a leaf spring brake 73 for preventing the seedling box from dropping due to its own weight is provided at a position having a length L corresponding to one seedling box from above the slope portion 21-2. For this reason, when one seedling box alone approaches the slope portion 21-2, the seedling box is prevented from sliding down.

[0065]

As described above, in the seedling feeding device according to the present invention, by providing the seedling holder with the seedling catching roller, the seedling extruded from the seedling box by the seedling pushing pin is securely held in the seedling holder. As a result, the seedling extruding pin did not bring the seedlings home or drop them from the seedling holder.

[Brief description of drawings]

FIG. 1 is an overall side view of a first embodiment.

FIG. 2 is a side view of the planting part according to the first embodiment.

FIG. 3 is a plan view of a planting part according to the first embodiment.

FIG. 4 is a rear view of the planting part according to the first embodiment.

FIG. 5 is a plan view of a main part of a planting part.

FIG. 6 is a plan view of a main part of the planting part different from that of FIG.

FIG. 7 is a perspective view of a front end portion of a seedling box mounting portion.

FIG. 8 is an explanatory diagram of seedling supply.

FIG. 9 is a first explanatory diagram of the operation of the seedling box feeding device.

FIG. 10 is a second operation explanatory diagram of the seedling box feeding device.

FIG. 11 is a third explanatory diagram of the operation of the seedling box feeding device.

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

FIG. 13 is a side view of the main part of the planting part.

FIG. 14 is a side view of the seedling pushing device.

FIG. 15 is a plan view of a main part of the seedling pushing device.

FIG. 16 is a side view of a seedling delivery device and a seedling dropping device.

FIG. 17 is a front view of a seedling holder.

FIG. 18 is a side sectional view of the seedling holder shown in FIG.

FIG. 19 is a side view of the seedling transport belt.

FIG. 20 is a rear view of the seedling transport belt.

FIG. 21 is a side view of the planting device.

FIG. 22 is a cross-sectional view of the planting device.

FIG. 23 is a side view showing the internal structure of the planting device.

FIG. 24 is a developed sectional view of a transmission case.

FIG. 25 is a front view of the seedling holder.

26 is a side sectional view of the seedling holder shown in FIG. 25.

FIG. 27 is a plan view of essential parts such as a seedling holder.

28 is a cross-sectional view taken along the line S ₁ -S _{1 of} FIG.

29 is a front view of a main part of the seedling holder shown in FIG. 27. FIG.

30 is a cross-sectional view taken along the line S ₂ -S _{2 in} FIG.

FIG. 31 is a plan view of essential parts such as a seedling holder in a state different from FIG. 27.

FIG. 32 is a plan view of a main part such as a seedling holder in a state different from FIGS. 27 and 31.

FIG. 33 is a plan view of a seedling box.

34 is a view on arrow A in FIG.

FIG. 35 is an enlarged plan view of a seedling raising pot.

FIG. 36 is a side view of the second embodiment.

FIG. 37 is a rear view of the second embodiment.

38 is a view on arrow A in FIG. 36. FIG.

FIG. 39 is a side view of the third embodiment.

FIG. 40 is a side view of the seedling box feed table according to the third embodiment.

41 is a sectional view taken along line S-S in FIG. 40.

42 is a cross-sectional view of a main part of a seedling box used in Example 3. FIG.

[Explanation of symbols]

 1 Rice transplanter 2 Main machine 3 Planting part 4 Fertilizer application device 5 Planting part mounting device 100 Seedling extrusion pin 125 Seedling holder 128 Seedling catching roller 128a Protrusion 300 Seedling box 310 Seedling 310a Bed soil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Kato 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefectural Engineering Department, Iseki Agricultural Machinery Co., Ltd. Department

Claims (1)

[Claims] 1. A seedling pushing pin which is inserted into a pot of a seedling box through a hole formed at the bottom of the seedling box and pushes out the seedling from the seedling box, and a seedling holder which holds the pushed seedling and transfers it to a predetermined position. In the seedling supply device provided with, a protrusion that bites into the bed soil portion of the seedling pressed into the seedling holder is formed on the outer peripheral portion, and rotates in the seedling pushing direction by the seedling pushing pin, but in the opposite direction. Is a seedling feeding device characterized in that a non-rotating seedling catching roller is provided in the seedling holder.