JP2003092911A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems of a conventional seedling transplanter comprising the disturbance of seedlings pushed out of a holder to hinder the planting action by the over protruded seedlings when the holding resistance between the seedling holder and a seedling bed soil is too small and the failure in keeping the optimum posture of the seedling to disturb the planting posture by the collapse of the bed soil of the seedling when the holding resistance is too high. SOLUTION: A seedling on a seedling tray is pushed out with a pusher, transferred to a seedling holder, further to a lateral feeding apparatus with the seedling holder, supplied to a planting apparatus with the lateral feeding apparatus and planted with the planting apparatus. In the seedling transplanter having the above mechanism, the seedling holder contains a seedling holding claw to stop and hold a seedling pushed into the seedling holder to prevent the motion of the seedling and the seedling holding claw is gradually protruded toward the seedling side according to the motion of the claw along the seeding- side edge toward the pushing direction of the seedling pusher.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a seedling transplanter for taking out seedlings from a seedling raising pot of a seedling tray and planting them in a field, and belongs to the technical field of agricultural machinery.

[0002]

2. Description of the Related Art In the above-mentioned seedling transplanting machine, a seedling tray having seedling-growing pots with seedlings arranged in a row and a row is conveyed along a predetermined conveying path, and seedlings are extruded from the seedling-growing pot by a seedling extruding device during the conveyance. Together with this, the bed soil of the extruded seedling is adapted to be pushed into the seedling holder of the seedling carrier, and when the pushed seedling is transported to a predetermined position, the bed soil of the seedling is held. It is taken out from the plant and planted in the field.

The seedling holder is provided with the Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Laid-Open No. 31846, a pawl is provided to securely hold the floor soil portion pushed into the holder so as not to move.

[0004]

When the seedling is extruded, if the holding resistance between the seedling holder and the seedbed soil is small, some seedlings pop out more than necessary and the seedlings extruded from the holder are disturbed. , There is a problem that the seedling planting action is disturbed, and conversely, if the holding resistance is too large, the bed soil of the seedlings may collapse, and the seedlings cannot be maintained in a proper posture. There is a problem of disturbing posture.

Therefore, according to the above-mentioned conventional technique, such a nail is configured to forcibly project in a direction at right angles to the seedling pushing direction so as to penetrate deeply into the seedbed soil portion. Therefore, there has been a problem that the holding resistance between the seedling holder and the bed soil portion becomes too strong and the seedbed soil portion is collapsed. The present invention aims to solve such problems.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, in the present invention according to claim 1, the seedlings in the seedling tray are extruded by an extrusion device and supplied to the seedling holder, and the seedling holder conveys and supplies the seedlings to a lateral feeding device, In a seedling transplanting machine for feeding and planting seedlings with a feeding device, in the seedling holder-providing seedling holding claws for locking and holding the seedling pressed against the seedling holder-, The seedling holding claw is characterized in that the edge on the seedling side is formed so as to sequentially project toward the seedling side as it goes toward the extrusion direction side of the seedling extrusion device.

Extrusion pins of the seedling extruding device are provided in the same number as the right and left rows of the nursery pots, and the left and right one row of seedlings are simultaneously extruded by these extruding pins. Then, the bed soil portion of the extruded seedlings is accommodated and held in the seedling holding portion of the seedling holder partitioned for each seedling. The seed bed soil portion pushed into the seedling holder of the seedling holder gradually has a holding claw whose locking surface for the seed bed soil portion gradually projects toward the seedling side as it goes to the extrusion direction side of the seedling extruder. It is locked and held so as to bite into. Therefore, the seedbed soil portion in the holder is locked and held with an appropriate holding resistance to the extent that seedlings do not pop out, and the floor soil portion does not collapse.

According to the second aspect of the present invention, the seedlings in the seedling tray are extruded by an extrusion device and supplied to a seedling holder, and the seedling holder conveys and supplies the seedlings to a lateral feeding device. In a seedling transplanting machine for feeding and planting seedlings with a feeding device, in the seedling holder-providing seedling holding claws for locking and holding the seedling pressed against the seedling holder-, A seedling removing tool for extracting seedlings from the seedling holder on the lateral feeding device is configured to be movable up and down and provided so as to be able to pass through the seedling holder, and the edge of the seedling holding claw on the seedling side is provided. It is characterized in that it is configured to have an inclined surface that is separated from the seedling side as it goes from the apex located closest to the seedling side to the seedling removal side toward the seedling removal side.

When the seedbed soil is pushed into the holder,
The seedling extractor enters the holding part from the upper open part of the holder to receive the seedling, pulls it backward by passing the seedling holder, and further scrapes the seedling onto the transverse feeding device by moving the seedling extractor downward. become.

Even when the seedling removing tool touches the nail in the holder when the seedling removing tool passes through, the rear part of the edge of the nail on the seedling side is formed on the inclined surface away from the seedling side. There is no inadvertent interference with, and the passage through the seedling extractor is made smooth, and the seedling extractor action can be performed well.

[0011]

EFFECTS OF THE INVENTION In summary, according to the invention of claim 1, at the time of extruding seedlings, the seedlings can be properly regulated and held without damaging the seedlings and the soil part of the seedbed with nails, and the seedling planting action is improved. It can be carried out.

According to the invention of claim 2, when the seedlings are removed,
Even if the seedling removing tool and the seedling holder are interfered with each other, it is possible to suppress the generation of large vibrations in the seedling holder, to feed the seedlings to the proper position on the lateral feeding device, and to perform the seedling planting action well. You can

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, description will be given based on an embodiment shown in the drawings. This seedling transplanting machine 1 is for grass, and a planting part 4 for 6-row planting is mounted on the rear side of the riding traveling vehicle body 2 through a link device 3 so as to be able to move up and down. A fertilizer hopper 5a of the side-row fertilizer applicator 5 and a fertilizer feeding device 5b for feeding fertilizer for each row are arranged.

The traveling vehicle body 2 is provided with a pair of left and right steerable front wheels 6 and 6 that are driven to rotate and a pair of left and right rear wheels 7 and 7 that is driven to rotate. The engine E is mounted, and the rotational power of the engine E is transmitted by the belt transmission device 10 to the mission case 9
Is temporarily transmitted to a hydraulic pump attached to the upper part of the transmission, and from there is transmitted to the inside of the transmission case 9 by a belt transmission device 11 capable of continuously variable transmission. Then, the power changed by the transmission in the transmission case 9 is transmitted to the front wheels 6, 6 and the rear wheels 7, 7, and is transmitted to the planting portion 4 via the transmission shaft 9a, the intermediate gear case 9b, and the transmission shaft 9c. Being transmitted. In the figure, 12 is a steering wheel for steering the front wheels 6, 6, 13 is a control seat on which the operator sits, 14 is a step floor for the operator to move on the traveling vehicle body, and 15 is a spare seedling. Preliminary seedling stand on which to place
Reference numeral 6 is a line drawing marker that draws the course of the traveling vehicle body 2 in the next stroke to the field scene.

The link device 3 includes a frame 8 of the traveling vehicle body 2.
The upper links 21, 2 are attached to the link base 20 fixed to the rear end of the
1 and the lower links 22, 22 are rotatably attached,
The connecting frame 23 is connected to the rear ends of these vertical links. Then, the front end portion of the rolling shaft 24 rotatably supported on the planting portion 4 side is inserted and connected to the lower end portion of the connecting frame 23. As a result, the planting part 4 is mounted so as to be able to roll in the traveling direction. Further, the hydraulic cylinder 26 for driving the link device 3 has a frame 8 on the base side.
The piston rod side is connected to the tip of an arm 27 integrally fixed downward from the base of the upper links 21 and 21 via a spring. When the hydraulic cylinder 26 expands and contracts, the upper and lower links 21, 21, 22, 22 rotate around the support shaft on the link base 20 side, and the planting section 4 moves up and down.

For this seedling transplanter, seedlings grown in a seedling tray are used. The seedling tray T is made of flexible plastic, and as shown in FIG. 4, a plurality of seedling growing pots Ta are vertically and horizontally arranged at a predetermined pitch p. At the center of the seedling tray T on the left and right sides, a wide interval Tb is provided where the interval between the seedling raising pots is wide. Further, on both left and right edges of the seedling tray T, square holes Tc for feeding seedlings are formed at the same pitch as the seedling raising pot.

On the upper part of the planting section 4, three sets of upper and lower two stages of seedlings 30 and 30 inclined in a backward direction are provided side by side in parallel, and the seedling tray conveying path is provided at the rear end of each set of seedlings. 31 is connected. Each seedling tray transport path 31 has upper and lower seedling mounts 3
The seedling trays supplied from 0 and 30 one by one are formed in a substantially U-shape in a side view, in which the first half conveys downward, the conveying direction gradually changes in the middle, and the latter half conveys upward. Corresponding to this seedling tray transport path 31, a seedling tray feeding device 32 for transporting the seedling tray along the seedling tray transport path 31, and a seedling extrusion for pushing out one horizontal row of seedlings from the seedling tray at the seedling take-out position P. A device 33, a seedling carrier 34 that stores the taken-out seedlings in a seedling holder described later and conveys the seedlings in a downward arc, and a seedling carried by the seedling carrier from the seedling holder. A seedling take-out device 35 for taking out, a pair of left and right seedling feeding belts 36 for laterally feeding the seedlings for horizontal row taken out from the seedling holder half by half, and receiving the seedlings conveyed by the seedling feeding belt. A seedling planting device 37 to be planted in the field is provided. Also,
At the terminal end of the seedling tray transport path 31, an empty box storage frame 38 is provided which can store a plurality of empty seedling trays after the seedlings are taken out in a vertically stacked state.

The planting section frame 40, which supports the seedling tray transport path 31 and each device and has a transmission mechanism for these devices, is integrated with a drive case 41 arranged inside the U-shape of the seedling tray transport path 31. Is installed in. Then, four planting transmission frames 45 are extended rearward from the rear surface of the planting part frame 40, and a seedling planting device 37 is provided at the rear end thereof. Further, the base of the seedling mount support frame 46 is fixed to the upper surface of the drive case 41 to support the upper and lower two seed mounts 30, 30. The rolling shaft 24 is rotatably inserted into a bearing case 50 attached to a planting part support bracket 48 fixed to the front left and right center parts of the planting part frame 40. As a result, the entire planting part is supported in a rolling manner.

A center float 52 is provided below the planting section 4.
And a pair of left and right side floats 53, 53 are provided. During the planting work, these floats slide while leveling the field scene. Each of these floats 52, 53, 53 is provided with a grooving device 54 which forms a groove for fertilizer application in a field scene in the vicinity of the seedling planting position of each row, and a U-shaped cross-section of which has a rear opening on the rear side thereof. A letter-shaped fertilizer application guide 5c is attached, and a fertilizer application hose 5d for transferring the fertilizer fed from the fertilizer feeding device 5b is connected thereto for each line.

Next, the structure of each part of the planting part 4 will be described. FIG. 5 shows the structure of the seedling tray feeder 32. The seedling tray feeding device 32 includes a pair of left and right feeding pawls 60 and locking pawls 61 that operate at the seedling pushing position P. Feed claw 6
Reference numeral 0 is composed of a main feeding claw 60a and a sub feeding claw 60b rotatably attached thereto and urged toward the seedling tray transport path by a torque spring 60c, and reciprocates up and down along the seedling tray transport path. When it moves and moves downward, it engages with the square hole Tc of the seedling tray T, and when it moves upward, it disengages from the square hole and operates to get over to the next square hole.
The locking claw 61 interlocks with the operation of the feed claw 60,
When the lower part moves downward, it disengages from the square hole, and when the feed claw 60 moves upward, it engages with the square hole and operates to support the seedling tray.

By the operation of the feeding claws 60 and the locking claws 61, the seedling trays are intermittently fed along the seedling tray transport path 31 by one pitch of the pot arrangement. When the seedling tray is switched as shown in FIG. 5, the main feeding claw 6
0a engages with the square hole Tc of the preceding seedling tray T (1), and the auxiliary feed claw 60b engages with the square hole Tc of the succeeding seedling tray T (2). ), T (2)
Can be sent reliably. When the sub-feeding pawl 60b does not properly enter the square hole Tc of the subsequent seedling tray T (2), the sub-feeding pawl 60b pivots backward and escapes as shown by the chain line, so that the main feeding pawl 60a is It definitely enters the square hole Tc of the seedling tray T (1). Therefore, there is no problem in feeding the seedling tray.

The operating mechanism of the feed pawl has the following structure. That is, the seedling tray feed cam 65 is provided on the left and right cam shafts 64 supported on the lower part of the drive case 41, and the roller 67 rotatably supported by the roller support arm 66 is always in contact with the outer peripheral surface of the cam 65. Thus, the roller support arm 66 is biased by the spring 68. The roller support arm 66 is attached to the seedling tray feed drive shaft 69 provided on the upper part of the drive case 41 so as to rotate integrally with the drive shaft 69. Further, the seedling tray feeding drive arm 7 is provided with a seedling tray feeding operation arm 70 attached to the seedling tray feeding drive shaft 69 and supporting the seedling tray feeding operation arm and the feeding claw 60.
1 and 1 via a connecting rod 72. The seedling tray feed drive arm 71 includes a rotating shaft 7 rotatably supported.
It is attached to 3. With this configuration, when the seedling tray feeding cam 65 rotates, the roller supporting arm 66 swings, the swing of the roller supporting arm 66 is transmitted to the seedling tray feeding driving arm 71, and the feeding claw 60 reciprocates up and down. . 74 is a manual feed lever, which is a seedling tray feed drive shaft 69.
The seedling tray remaining in the seedling tray transfer path 31 can be taken out by repeatedly rotating the same in a state where the connection with is released.

At the upper part of the seedling tray transport path 31, a separating comb 7 for separating the leaf entanglement between the seedlings laterally adjacent to each other is formed.
5 are provided. This separating comb 75 has rod-shaped teeth 75a, 75b, ... Arranged in parallel between the rows of the seedlings. As shown in FIGS. And large teeth 75b are alternately arranged to reduce the resistance applied to the seedling when passing through the separating comb 75. This is to prevent the seedling tray feeding from being obstructed and the seedlings falling out of the pot of the seedling tray due to the large resistance applied to the seedlings.

At a position slightly above the seedling extrusion position P,
A resistance rod 76 is provided for lifting the foliage of the seedling upward so that the seedling can be fitted into the seedling holder 90 described later. As shown in FIG. 7, it is preferable that the resistance rod 76 be provided slightly rearward of the rear end of the seedling holder 90 located at the top dead center and at a height relatively close to the seedling holder 90.

FIG. 6 shows the construction of the seedling extrusion device 33. The seedling push-out pins 80, which are inserted into the seedling raising pots of the seedling tray and push out the seedlings, are arranged in the same number and pitch as the seedling raising pots.
The left and right ends of the holder 81 that holds the seedling pushing pin 80 are attached to a pair of left and right slide shafts 82 that are slidable in the front-rear direction. Rack 82 formed on the slide shaft 82
A sector gear 84 attached to the seedling extraction drive shaft 83 meshes with a. A pinion gear 85 is attached to the seedling pick-up drive shaft 83 so as to rotate freely, and an arcuate gear portion 86a formed on the outer peripheral surface of the gear arm 86 meshes with the pinion gear 85. A roller 87 is rotatably supported in the middle of the gear arm 86, and the roller 87 is supported by the groove cam 8.
No. 8 groove 88a is slidably fitted.

With this configuration, when the groove cam 88 rotates, the slide shaft 82 slides back and forth, and the seedling pushing pin 8
0 causes the seedling raising pot Ta to project and retract. When the seedling holder 90, which will be described later, is stopped at the top dead center of the movement trajectory K, the seedling pushing pin 80 operates to project, is inserted into the pot through the cut formed at the bottom of the seedling pot, and pushes the seedling backward. . The extruded seedlings are stored in a seedling holder.
After that, the seedling pushing pin 80 is retracted and the seedling holder containing the seedling moves downward.

Since the shape of the groove cam 88 is set such that the seedling pushing pin 80 has a slow initial speed and a gradually increasing initial speed, the impact when the seedling pushing pin 80 hits the bed soil of the seedling is softened and is soft. Even in the case of floor soil, it is difficult to open holes. Further, even if the seedling push-out pin 80 pierces the bed soil of the seedling, the retracting operation of the seedling push-out pin 80 is accelerated so that the seedling holder moves downward after the seedling push-out pin 80 leaves the seedling. Therefore, the floor soil will not collapse. The shape of the conventional groove cam is as shown by the chain line, and the seedling pushing pin 80 is adapted to perform the projecting and retracting operations at substantially the same speed.

In the transmission path that is transmitted from the grooved cam 88 that is rotationally driven to the left and right racks 82a, the seedling pushing pin 8 is provided.
An extrusion pin position adjusting device 89 for adjusting the protruding position of 0 is provided. As shown in FIGS. 7 and 8, the push-out pin position adjusting device 89 includes an adjusting arm 89a fixed so as to rotate integrally with the seedling taking-out drive shaft 83, and the seedling taking-out drive shaft 83.
And an operating arm 89d that is rotatably and fixedly mounted on a bearing body 89b that supports the rotating arm 89d via a tightening bolt 89c. The ridge 89e of the adjusting arm 89a is an operating arm 89d.
Engaging with the groove 89f of the control arm 89a and the operating arm 8
It is configured to rotate integrally with 9d. Then, the operation arm 89d is slid along the seedling take-out drive shaft 83 to release the engagement between the protrusion 89e of the adjustment arm 89a and the groove 89f of the operation arm 89d, and the adjustment arm 89a. When the engaging position of the protrusion 89e of the adjusting arm 89a and the groove 89f of the operating arm 89d is adjusted by rotating the operating arm 89d, the adjusting arm 89a and the seedlings are removed. Drive shaft 8
3, the slide shaft 8 through the fan-shaped gear 84 and the rack 82a
2 slides back and forth, and the protruding position of the push pin 80 is changed and adjusted to an arbitrary position. The power from the pinion gear 85 is transmitted to the operation arm 89d through the bearing body 89b. Therefore, according to this structure, the protruding positions of the plurality of right and left rows of the push-out pins are finely adjusted all at once, and the protruding positions of the pins can be optimized. In addition, the protrusion 89e of the adjustment arm 89a and the groove 89f of the operation arm 89d are fitted to the seedling extraction drive shaft 8.
Since it is provided at a position apart from 3, the adjustment arm 89a
It is possible to finely adjust the angle of the rotation direction around the seedling extraction drive shaft 83 with respect to the operation arm 89d. Further, by sliding the operation arm 89d along the seedling take-out drive shaft 83, the ridge 89e of the adjustment arm 89a and the operation arm 89d.
Since the engagement position of the d with the groove 89f can be changed, it is possible to easily finely adjust the protruding position of the plurality of push-out pins in the left and right rows.

The seedling conveying device 34 is equipped with a seedling holder shown in FIGS. 9 to 11. In the seedling holder 90, seedling holding portions 90a each having a shape that is open at the front and rear and is cut out at the top are formed in the same number as the number of pots in a horizontal row of the seedling tray, and the floor soil portion is fitted therein. It is designed to hold seedlings. Body partition wall 90b that constitutes the seedling holding portion 90a, the front upper portion cut away obliquely in a side view the outer inclined surface 90b ₁ is provided, the resistance when the seedlings holder 90 is in the same height as the seedling pushing position P The rod 78 is located on the rear side of the line connecting the centers of the seedling raising pot Ta located at the seedling pushing position P. As a result, even if the foliage of the seedling lifted by the resistance rod 78 is entangled, it does not get caught on the main body partition wall 90b. Further, the body partition wall 90b Te to be wider as the inlet side to the inner wall surface of the seedling holding portion 90a side - has a configuration which is easily shaped inner inclined surface 90b ₂ are provided contains the seedlings - Pas. The front portion of the main body partition wall 90b is preferably configured to have a conical shape as a whole. An extended partition wall 90c having a wall thickness thinner than that of the main body partition wall 90b extends rearward from the rear surface of the main body partition wall 90b.

Fixed side-holding claws 90d are provided on the left and right side wall portions of the seedling holding portion 90a so as to project in the lateral direction, and the seedbed soil portion pushed into the seedling holding portion 90a is retained from the left and right sides. Is configured. In addition, the bottom wall of the seedling holding portion 90a is provided with a movable holding claw 90e that can be vertically retracted. When the seedling is pushed into the seedling holding portion, the holding claw 90e receives a pushing resistance and moves downward in the direction of immersing. However, when the seedling is pushed into a predetermined position in the seedling holding portion, the holding claw 90
The e is projecting upward into the seedling holding portion 90a and locked and held so as to bite into the bed soil of the seedling.

The fixed holding claw 90d has a structure in which the edge of the claw on the seedling side is gradually projected toward the seedling side as it goes to the extrusion direction side of the seedling pushing device, that is, the front part is closer to the left and right wall surfaces. The wedge-shaped inclined surface 90d ₁ is provided so that the protrusion amount is small and the protrusion amount is gradually increased toward the rear part.
The movable holding claw 90e of the bottom wall portion is the fixed holding claw 90e.
Similar to d, the edge of the nail on the seedling side is made to gradually project toward the seedling side as it goes to the extrusion direction side of the seedling extrusion device, that is, the taper in which the amount of protrusion on the rear side is larger than that on the front side. The slope 90e ₁ is provided, and the slope 90e ₁ is arranged slightly forward of the holding claws 90d on the left and right wall surfaces. Therefore, according to the shape and arrangement of the holding claws 90d and 90e, the seedlings extruded by the seedling pushing pin 80 are easily inserted into the seedling holding portion 90a, and the seedling pushing pin 80 does not return the seedlings.

The rear end portions of the holding claws 90e and 90d are located at the seedling side edge of the holding claws on the seedling side (from the apex with the largest protrusion amount) to the seedling pulling side to the seedling pulling side. The slopes 90e ₂ and 90d ₂ are formed so as to separate from the seedling side as the distance increases. As a result, the take-out operation of the seedlings by the seedling removing tool described later is smoothly performed.

The operation mechanism of the movable holding claw 90e will be described later. The seedling holder 90 is supported by a pair of upper and lower swing links 91 and 92, and a mounting plate 95 is attached to an extension of a connecting link 93 that connects the rear ends of the swing links 91 and 92, which are parallel links. Attached together,
The seedling holder 90 is attached to the front end of the support body 97 fixed to the left and right central portions of the connecting rod 96 that connects the left and right mounting plates 95 to each other.
Is supported. (See FIGS. 3 and 12) Swing link 9
As the seedling holders 90 swing, the seedling holder 90 reciprocates while drawing a circular arc-shaped movement trajectory K while maintaining a fixed posture.

When the seedling holder 90 is stopped at the upper end of the movement path K, the seedling tray feeding operation causes the foliage of the seedlings in a horizontal row to enter the seedling holding portion 90a from above. At that time, the root portion of the foliage passes between the main body partition walls 90b, and the tip end side portion thereof passes between the extended partition walls 90c. Body partition wall 90
Since the front upper part of b is cut off obliquely in a side view, the foliage of the seedling is not caught on the main body partition wall 90b. Further, since the extended partition wall 90c has a small thickness, even if it is a seedling of grass that grows in a state where the tip end side of the leaf is spread,
The leaves are not caught on the extension partition wall 90c and the seedling holding portion 9 is provided.
Easy to enter 0a. By passing the leaf stem between the extended partition walls 90c, the seedlings can be straightened forward and backward. Then, the seedlings are extruded rearward from the horizontal row of seedling raising pots of the seedling tray located at the seedling take-out position P, and the bed soil of the seedlings is pushed into each seedling holding portion 90a of the seedling holder. The seedling holder 90 holding the seedlings moves to the lower end of the movement track K, and the seedling extracting device 35 extracts the seedlings.

The operating mechanism of the movable holding claw is shown in FIG.
As shown in. Movable holding claw 9 for each seedling holding part
0e is attached to a common shaft 102 that is rotatably installed on the left and right side plates 101, 101.
A rotating arm 103 is attached to the unit 2 so as to rotate integrally with the movable holding claw 90e. The rotating arm 103 is urged by the tension spring 104 so that the holding claw 90e always operates in the protruding direction, and when the external force is not applied, the rotating arm 103 is rotated to a position regulated by the stopper 105. Has become.

12 to 14 show the structure of the seedling take-out device 35. Further, FIG. 15 is an operation explanatory view of the seedling take-out device 35. The seedling take-out device 35 is provided so that a comb-shaped seedling extractor 120 capable of passing back and forth through the seedling holding portion 90a of the seedling holder 90 that has reached just before the bottom dead center of the movement trajectory K rotates up and down. The seedling removing tool 120 receives the seedlings held in the respective seedling holders of the seedling holder 90, and only the seedling holder 90 passes through to take out the seedlings (FIG. 15A).
20 rotates downward, and the protrusion 120a protruding from the rear surface of the seedling removing device scrapes off the seedling taken out onto the seedling feeding belt 36 (FIG. 16 (b)).

The seedling pulling tool 120 is integrally attached to a left and right seedling pulling attachment shaft 121 which is rotatably provided. A roller 123 is rotatably supported by a rotary arm 122 fixed to the seedling removing mounting shaft 121, and a spring 126 is attached to the spring 126 so that the roller comes into contact with the cam surface of the seedling removing cam 125 attached to the seedling removing cam shaft 124. Turning arm 1
22 is urged. When the seedling removing cam 125 rotates,
When the roller 123 is fitted into the concave portion of the cam, the seedling removing tool 12
The 0 swivels downwards quickly and operates so that it immediately returns to its original position.

Further, as shown in FIG. 16, the seedling removing device 120 is provided with notches 120b at portions corresponding to the left and right fixed holding claws 90d in the seedling holder 90, so that the seedling removing device 120 can be removed. The extraction width of the seedlings (area of contact with the soil of the nursery bed) is made as wide as possible to facilitate the extraction of seedlings.

When the seedling removing tool 120 is used to extract seedlings, if the lower moving holding claw 90 is forcibly immersed downward, the seedlings can be extracted from the holder more easily. . The seedling removing tool 120 is provided with a mud-stripping brush 127 that is inserted into the seedling holder from the seedling holder 90 after taking out the seedlings and removes the mud attached to the seedling holder 90. This mud-dripping brush 127 is shown in FIG.
As shown in (1), it is provided in a position in front of the seedling feeding belt 36 so that the removed mud does not fall on the seedling feeding belt 36. In addition, if the mud-stripping brush is provided separately from the seedling removing device 120 so as to be located above the movement path of the seedling holder in the forward stroke of the seedling holder and to descend to the position of the movement trajectory after the return stroke, the mud is removed. Since the mud scraped off by the drop brush will be blown forward,
It is possible to reliably prevent the mud from falling onto the seedling feeding belt 36.

The seedling removing device 35 includes a seedling removing tool 120.
Is provided with a pair of left and right seedling removing tools 130 for removing seedlings that could not be taken out from the seedling holder. The seedling removing tool 130 is a plate body in which a front edge 130a having a saw blade shape in a plan view is formed and a protrusion 130b having a semicircular shape in a side view is formed on a lower surface thereof.
It is attached integrally with an attachment arm 132 that is rotatably fitted to the. The left and right mounting arms 132, 132 are connected via a connecting shaft 132a. A roller 134 is rotatably supported by a roller support arm 133 that rotates integrally with the right mounting arm 132, and the roller abuts on the cam surface of a seedling removing tool operating cam 135 attached to the seedling removing cam shaft 124. Thus, the spring 136 urges the roller support arm 133.

When the seedling removing tool operating cam 135 rotates in synchronization with the seedling removing cam 125 and the seedling holder 90 moves in the forward stroke, the seedling removing tool that has been waiting above the movement track K of the seedling holder. 130 moves down to near the lower side of the movement locus K of the seedling holder when the seedling holder 90 moves on the return stroke (FIG. 15 (c)). When the seedlings are not completely taken out from the seedling holder 90-because the foliage of the seedlings is caught on the seedling holder 90, the seedling N is suspended from the seedling holder 90 and is returned. The seedling removing tool 130 receives the seedlings to be brought back by the saw blade-shaped front edge 130a and separates them from the seedling holder-90. At this time, the foliage that is not caught by the seedling removing tool 130 is pressed by the protrusion 130b so as not to spread upward.

When the seedling holder 90 passes above the seedling removing tool 130, the seedling removing tool 130 moves upward. In this upward movement position, the roller 134 contacts the uneven surface of the seedling removing tool operating cam 135, so that the seedling removing tool 130 repeatedly moves up and down in small increments to give vibration to the seedlings (FIG. 15 (d)). ). As a result, the seedlings N brought back to the seedling holder-90 are transferred to the seedling holder-9.
In addition to being reliably separated from 0, the stems and leaves of the seedlings are detached from the seedling removing tool 130.

A pair of seedling feeding belts 36 are provided on the right and left sides, and the action portions thereof are adapted to move outward. The horizontal row of the seedlings N taken out by the seedling take-out device 35 are dropped on the pair of left and right seedling feeding belts 36 in an aligned state, and the seedling feeding belts 36 that receive the seedling feeding belt 36 receive the left and right half seedlings on the left and right sides respectively. Transport to. The seedling N conveyed by the seedling feeding belt 36 is dropped between the pair of planting guides 143 provided with an appropriate gap.

The seedling planting device 37 includes a planting transmission frame 45.
A pair of seedling implants 142, 142 are attached to a rotating case 141 that rotates integrally with the drive shaft 140 for planting provided at the rear end of the plant, and the seedling implants 142, 142 move in a closed-loop tip trajectory. To do. Each seedling planting tool 142 alternately picks up one seedling dropped in between the pair of planting guides 143 and moves it between the pair of planting guides 143 to plant it in the field.

[Brief description of drawings]

FIG. 1 is a side view of a seedling transplanter.

FIG. 2 is a plan view of a seedling transplanter.

FIG. 3 is a side view showing a part of a planting part.

FIG. 4 is a view on arrow A in FIG.

FIG. 5 is a side view of the seedling feeding device.

FIG. 6 is a side view of the seedling extrusion device.

FIG. 7 is a front view of the main part of the same.

FIG. 8 is a side view of the main part of the same.

FIG. 9 is a side view of a seedling holder, a resistance rod, and the like.

FIG. 10 is a side view of a seedling holder.

[FIG. 11] (a) plan view of the seedling holder, (b) rear view,
(C) It is a principal part top view.

FIG. 12 is a plan view of a seedling take-out device.

FIG. 13 is a side view of the seedling removing device mainly showing the seedling removing tool.

FIG. 14 is a side view of the seedling removing device mainly showing the seedling removing device.

FIG. 15 is an explanatory diagram of the operation of the seedling take-out device.

FIG. 16 is a rear view showing the relationship between the seedling holder and the seedling removing device.

[Explanation of symbols]

1 Seedling transplanter 2 Traveling vehicle 4 Planting part 31 Seedling tray conveying path 32 Seedling tray feeding device 33 Seedling extruding device 34 Seedling conveying device 35 Seedling extracting device 36 Seedling feeding belt 37 Seedling planting device 60 Seedling extruding pin 90 Seedling holder- 90a Seedling holding portion 90b Main body partition wall 90c Extended partition wall 90d Fixed holding claw 90d ₁
Wedge-shaped slope 90e Movable holding claw 90e ₁
Tapered slope 120 Seedling remover

Claims (2)

[Claims] 1. A seedling in a seedling tray is extruded by an extrusion device to be supplied to a seedling holder, and the seedling holder conveys and supplies the seedling onto a transverse feeding device, and the transverse feeding device seeds the seedling. In the seedling transplanting machine for supplying and planting the seedling holder, a seedling holding claw for locking and holding the seedling pressed against the seedling holder is provided in the seedling holder, and the seedling holding claw is A seedling transplanting machine, characterized in that the edge on the seedling side is formed so as to sequentially project toward the seedling side as it goes toward the extrusion direction side of the seedling extrusion device. 2. The seedlings in the seedling tray are extruded by an extrusion device and supplied to a seedling holder, and the seedling holder conveys and supplies the seedlings onto a transverse feeding device, and the transverse feeding device plants the seedlings. In the seedling transplanting machine for supplying and planting to the device, a seedling holding claw for locking and holding the seedling holder pressed against the seedling holder is provided in the seedling holder, and the seedling holder-transverse feed device. The seedling removing tool for extracting the seedlings is configured to be movable up and down and provided so as to be able to pass through the seedling holder, and the edge of the seedling-holding claw on the seedling side is located at the top of the seedling. The seedling transplanting machine is characterized in that it is configured to have an inclined surface that is separated from the seedling side from the seedling removing side to the seedling removing side.