JP2002369606A - Seedling separately feeding apparatus for transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely transfer seedlings from a seedling taking out tine to a planting body of a planting part in a seedling separately feeding apparatus for a transplanter in which seedlings in a pot part of a seedling tray are thrust with the seedling taking out tine, the seedling taking out tine is withdrawn from the seedling tray to take out the seedlings from the pot part, the seedlings taken out from the pot part are transported to a seedling release position and the seedlings are released from the seedling taking out tine to a planting part at the seedling release position by moving a seedling release tool from the backs of the seedlings toward the tip of the seedling taking out tine. SOLUTION: The seedling release tool 134 is moved in a stopped state of the seedling taking out tine 35A so as to release the seedlings N.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a transplanter for automatically planting seedlings such as onions, lettuce, cabbage, tobacco, etc., in particular, on a row while running onion seedlings. The present invention relates to a seedling feeding device that removes soil block seedlings raised in a seedling tray one by one from a pot portion of the seedling tray and supplies the seeds to a planting portion.

[0002]

2. Description of the Related Art As a transplanting machine, a seedling mounting table for mounting a seedling tray having a large number of pots vertically and horizontally on a traveling machine body, a planting section for planting seedlings in ridges, and a seedling tray on the seedling mounting table. A seedling feeding device that takes out seedlings one by one from the pot portion and supplies the seedlings to the planting portion, so that the seedlings are automatically and sequentially planted at intervals in the ridge longitudinal direction while running along the ridges. This is disclosed in JP-A-12-41424. As shown in FIG. 19, the seedling delivery device 190 includes:
The seedling removal tool 192 for removing the seedlings N in the pot portion P of the seedling tray T on the seedling mounting table 191 and an operating mechanism 193 for operating the seedling removal tool 192 are provided.

[0003] The seedling removal tool 192 includes a pair of seedling removal claws 194.
And the cylindrical body 19 having the seedling removal claw 194 attached to the distal end side.
5 and a guide rod 196 for guiding the cylindrical body 195
The guide rod 196 is inserted through the cylindrical body 195 so as to be movable in the axial direction, and the cylindrical body 195 is supported by the cylindrical portion 198 of the holder 197 so as to be movable in the axial direction. The operation mechanism 193 includes a crank body 200 that is rotationally driven by a rotation shaft 199 that rotates counterclockwise in FIG. 19, a swing arm 201, and a guide member 202.

The swing arm 201 is pivotally supported on the lower side by a pivot 203 so as to be swingable so as to approach and separate from the seedling tray T. The swing arm 201 has a cam groove 2.
The cam groove 204 is formed in the cam groove 204.
00 is fitted with a crank pin 205. The cylindrical portion 198 of the holder 197 of the seedling removal tool 192 is
6, a roller 207 provided on the holder 197 is fitted into the cam groove 208 of the guide member 202 while being pivotally attached to the upper side of the swing arm 201 via the arm 6.

[0005] The guide member 202 is fixed to the fixed frame 20.
9 via a support shaft 210 and a rotating shaft 19
9 has a roller 212 that rolls on the outer peripheral surface of a cam body 211 provided so as to be integrally rotatable. This seedling delivery device 190
19, when the rotating shaft 199 rotates counterclockwise from the state shown in FIG. 19, the crankpin 205 presses the pushing link 213 of the seedling removal tool 192, and the pushing link 213 moves in the direction indicated by the arrow K. When extruded, the cylindrical body 195
At the same time, the seedling extraction nail 194 advances with respect to the seedling tray T, and the seedling extraction nail 194 is pierced into the floor soil of the seedling N in the pot portion P.

At this time, the lock arm 214 provided on the rear portion of the cylinder 195 is engaged with the engaging portion 21 provided on the holder 197 side.
5 while maintaining the protruding state, and
7 and the cylinder 195 are compressed to urge the cylinder 195 in the returning direction, and the spring provided between the guide rod 196 and the cylinder 195 is also compressed. Guide rod 196 with respect to body 195
Is biased in the forward direction (to the right in FIG. 19). Also,
The movement of the guide rod 196 in the forward direction is regulated by the contact of the regulating piece 218 provided on the guide rod 196 with the lock portion 217 of the operating member 216 provided on the holder 197.

[0007] From this state, the crank body 200
Is rotated, the swing arm 201 is swung to the left by the crank pin 205, and the swing arm 201 moves the seedling removal tool 192 to the left.
Is extracted from the pot portion P. Further, when the crank body 200 further rotates, the swing arm 201 swings to the left, and the roller 207 moves to the cam groove 20 of the guide member 202.
8, the guide member 202 is pushed up by the cam portion 211A of the cam body 211, and the seedling N is moved to a seedling release position indicated by a virtual line in FIG.
Is transported.

At this position, when the seedling removal tool 192 is further pushed up, the foot portion 219 of the operating member 216 comes into contact with the fixed side releasing portion 220 provided on the frame 209, and the operating member 216 is supported. The lock member 217 of the operating member 216 rotates counterclockwise around the shaft
18, the guide rod 196 advances with respect to the cylinder 195. At the front end side of the guide rod 196, a seedling releasing tool 222 is provided. When the guide rod 196 moves forward, the seedling releasing tool 222 moves from the rear surface of the seedling N to the tip end of the seedling extracting claw 194, and As a result, the seedling N is pushed out from the seedling removal nail 194 and released to the planted body 223 of the planting part.

[0009] The seedlings N transferred to the planting body 223 are dropped and released into planting holes formed by the planting body 223 descending and entering the ridges to open.

[0010]

In the above-mentioned conventional structure, when the seedling N is released from the seedling extraction nail 194, the seedling N is released while the seedling extraction nail 194 moves upward. The release direction of the seedlings N is not constant, and the delivery of the seedlings N may not be performed reliably. In particular, there is a problem that the stock-out rate increases due to the speeding up of the transplantation operation (as the engine speed increases). An object of the present invention is to provide a seedling transfer device for a transplanter that can solve the above problem.

[0011]

A technical means for solving the problem in the method of the present invention is to operate a seedling extracting member so as to take out a seedling in a pot portion of a seedling tray and transport it to a seedling discharging position. At the release position, the seedling delivery device of the transplanter configured to release seedlings from the seedling removal member to the planting section is configured to release seedlings from the seedling removal member with the seedling removal member stopped. It is characterized by the following.

Another technical means is to pierce a seedling in a pot portion of a seedling tray with a seedling extracting member, and then retract the seedling extracting member from the seedling tray to extract a seedling from the pot portion. The seedlings are transported to the seedling release position, and at this seedling release position, the seedling release tool is moved from the back of the seedling toward the tip of the seedling removal member, so that the seedlings are transferred from the seedling removal member to the planting section. In the seedling delivery device of the transplanter that releases the seedlings, the seedling releasing tool is moved to release the seedlings while the seedling removal member is stopped.

[0013] Further, other technical means include a seedling removal member,
After moving the seedling removal member forward with respect to the seedling tray and piercing the seedling in the pot portion, by retracting from the seedling tray, the seedling is taken out from the pot portion, and the taken-out seedling is transported to the seedling release position. An operation mechanism for operating the seedling removal member, and a seedling release tool that releases a seedling from the seedling removal tool to the planting portion by moving from the back of the seedling toward the tip of the seedling removal tool at the seedling release position. And a stopping means for stopping the seedling removal member at the seedling release position, and moving the seedling release tool with the seedling removal member stopped to release the seedling. Activating means for activating the seedling releasing tool.

[0014] The starting means may be constituted by an operating body for releasing the regulation of the seedling releasing operation of the seedling releasing member, and a cam for operating the operating body. Further, the operating body includes, on one end side, a release portion that engages with means for restricting the seedling releasing operation of the seedling releasing member and releases the restriction, and an engaging portion that engages with the cam is provided on the other end side. The cam is engaged with the engaging portion of the operating body in a state where the seedling extracting member is located at the seedling discharging position and is stopped, and the release portion is provided with the seedling. It is preferable to provide an engaged portion for swinging the operating body so as to engage with a means for regulating the seedling releasing operation of the releasing member.

The operating mechanism includes a swing arm that supports the seedling removal member and swings so as to approach and separate from the seedling tray, a driving body that swings the swing arm by rotation, A guide member for controlling the attitude of the seedling removal member therein, and the swing arm has a groove cam that engages with an engaging body of a driving body that moves in a circular motion and converts a rotational motion into a swing motion, Preferably, the groove cam is provided with a seedling removal member stopping portion for stopping the seedling removal member at the seedling discharge position.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 12 and 13, reference numeral 1 denotes a transplanter. The transplanter 1 is a walking type having a transplanting device 3 and a steering handle 4 at a rear portion of a traveling body 2, and is a state in which the transplanter 1 straddles a ridge R. The soil block seedlings (hereinafter referred to as seedlings) N are automatically planted at predetermined intervals in the ridges R while traveling forward in the ridge longitudinal direction (the left-right direction in FIG. 12).

Further, the transplanter 1 is configured so as to simultaneously plant two right and left seedlings by running one way (one way) in the longitudinal direction of the ridge. Note that the ridge R may be covered with a multi-film. The traveling body 2 has a traveling machine body 8 which is mainly constructed by mounting and fixing a gantry 6 to a front portion of a transmission case 5 so as to protrude forward and mounting an engine, a fuel tank, a battery, and the like on the gantry 6. Front wheel 9 and rear wheel (drive wheel) 10 provided on both right and left sides of body 8
And

The front wheels 9 are provided at right and left ends of a front wheel support shaft 11 rotatably supported by a front portion of the gantry 6 via support arms 12. A rear wheel 10 is provided via a transmission case 14 at an outer end of a rear wheel support shaft 13 which protrudes from the rear wheel and is rotatably supported around a left-right axis. The power of the engine is input to the transmission case 5, and the power of the traveling system is transmitted from the transmission case 5 to the rear wheels 10 via the transmission shafts in the left and right rear wheel support shafts 13 and the transmission mechanism in the transmission case 14. It has become.

Power can be taken out of the transmission case 5 from a first PTO shaft 18 protruding rearward and a second PTO shaft 19 protruding left and right sides. The front wheel support shaft 11 and the rear wheel support shaft 13 on the same side are linked by an interlocking rod 15, and the interlock member 17 is operated by operating a hydraulic cylinder 16 supported by the gantry 6.
The front wheel support shaft 11 and the rear wheel support shaft 13 rotate in conjunction with each other via the interlocking rod 15, whereby the left and right front and rear wheels 9 and 10 move up and down at the same time, and the traveling machine body 8 and the like move on the ridge R. It is configured to move up and down.

The left and right sides or one side (right side) of the front wheel support shaft 11 and the left and right sides or one left and right side of the rear wheel support shaft 13 are:
It is configured to be extendable and contractible, and the tread can be adjusted according to the left and right width of the ridge R. Therefore, the transplanter 1 is offset to the other side (left side) of the ridge R by extending the front wheel support shaft 11 and the rear wheel support shaft 13 on the left and right sides. Is reciprocated in the longitudinal direction of the ridge R, so that four rows of seedlings are planted in the ridge R.

For a narrow ridge R, the front wheel support shaft 11
And the rear wheel support shaft 13 is contracted, and the transplanting device 3 is arranged at the center of the ridge.
Two rows of seedlings can be planted on the ridges. A bonnet 21 that covers the engine and the like is provided on the gantry 6. On both left and right sides of the bonnet 21, a spare seedling tray mounting table is provided. The transplanting device 3 is provided on a transplanting frame 26 attached to a rear portion of the traveling machine body 8, and has a planting portion 27 for planting a seedling N in a ridge R, and a seedling supply for supplying the seedling N to the planting portion 27. And a main part 28.

The transplant frame 26 is composed of a fixed frame 26A having a front portion fixed to the transmission case 5 and a movable frame 26B having a front portion rotatably mounted on the second PTO shaft 19 about its axis. , Fixed frame 2
6A is provided with a seedling supply section 28 and a handle 4
The movable frame 2 is provided with a mounting frame 29 for mounting and fixing the
6B is provided with a planting portion 27. The seedling supply unit 28
Seedling tray 3 on which seedling tray T on which a large number of seedlings have been raised is placed
0, and a seedling delivery device 31 that takes out the seedling N from the pot portion P of the seedling tray T at a predetermined position, conveys the seedling N to the planting portion 27, and supplies the seedling N.

The seedling tray T is made of plastic, formed thin, has flexibility, and has a large number of pot portions P arranged in a grid pattern at predetermined pitches in the vertical and horizontal directions. The soil block seedling N is grown by filling the pot portion P with floor soil, sowing and raising the seedling there. Also, the seedling tray T has, for example, 10 × 20 =
Two kinds of 200 pieces and 12 × 24 = 288 pieces are mainly used, and the pot portions P are different in size.

The seedling mounting table 30 is mainly composed of a mounting plate 30A on which the seedling tray T is mounted, and side plates 30B provided on the left and right sides of the mounting plate 30A, and is arranged in a downwardly inclined shape. The front and rear rails 32A and 32B provided on the fixed frame 26A and the mounting frame 29 are supported so as to be able to reciprocate in the left-right direction. In addition, the seedling supply unit 28 has a horizontal feeding means for intermittently feeding the seedling tray T in the horizontal arrangement direction (lateral direction) and a vertical feeding means for vertically feeding the seedling tray T in the vertical arrangement direction. By intermittently feeding the seedling mounting table 30 in the left-right direction by the horizontal feeding means, the seedlings N can be taken out of the horizontal row of pot portions P by the seedling distribution device 31, and the seedlings can be extracted from the horizontal row of pot portions P. After taking out N, the vertical feeding means vertically feeds the seedling tray T for one pitch of the pot portion P, so that the seedling N can be taken out from the next horizontal row of pot portions P.

The seedling distributing device 31 is disposed in front of the seedling mounting table 30 and includes a pair of left and right seedling removal tools 35 for one seedling tray T to cope with double-row planting. Further, an operating mechanism 36 for supporting and operating the seedling removing tool 35 is provided for each of the pair of seedling removing tools 35. Each seedling extraction tool 35 is provided with a pair of left and right needle-like or L-shaped cross-section seedling extraction nails 35A (seedling extraction members) at the distal end.
The seedlings N can be held by piercing the inner floor soil (block soil).

The right and left seedling removal tools 35 are arranged side by side at a pitch equal to half the number of the pot portions P in the horizontal arrangement direction. The seedling N is taken out from one half (right side) of the pot portion P in the horizontal arrangement direction of P, and the other (left side) seedling removal tool 35 is used to remove the other half (left side) of the pot portion P in the horizontal arrangement direction of the pot portion P. The seedling N is taken out from P. The operation mechanism 36 is provided corresponding to each of the left and right seedling delivery devices 31, and receives power from the first PTO shaft 18 via the transmission shaft 37 to operate the left and right seedling removal tools 35 in synchronization. It has become.

Then, by driving each of the operating mechanisms 36,
As shown in FIGS. 10 and 11, the seedling removal claw 35A of each seedling removal tool 35 reciprocates and swings while drawing a track K between the pot portion P and the planting portion 27 of the seedling tray T. It is configured so that the seedlings N in the inside are taken out and supplied to the planted body 44 of the planting part 27. From the operating mechanism 36 to the branch transmission shaft 41
Power is transmitted from the branch transmission shaft 41 to the input shaft of the traversing means via a chain transmission mechanism 42.

As shown in FIG. 10 to FIG.
Is a planting body 44 that forms a planting hole in the ridge R and releases the seedling N there, and a planting that moves the planting body 44 up and down between an upper seedling supply position and a lower seedling discharging position. It has a drive mechanism 51 and soil covering means 46 for burying the floor soil of the seedlings N by pressing the soil from the left and right sides of the seedlings N discharged into the planting holes at the time of planting. In addition, the planting portion 27 of the two-row simultaneous planting is inclined downward and outward such that the pair of left and right planting bodies 44 and the planting drive mechanism 51 are narrow on the upper side and wide on the lower side.

The planting drive mechanism 51 includes a movable frame 2
6B, a drive arm 57 rotatably provided on the movable frame 26B, two substantially parallel base links 52 supported by the movable frame 26B so as to be swingable in a substantially vertical direction, and a rocking body 53 provided at the end of the base link 52. An upper link 54 having a base connected to the tip of the drive arm 57 and an intermediate part connected above the basic link connection position of the rocking body 53, and a planting body 44 provided at the tip of the upper link 54. Lifting body 56 supported
A lower link 55 connecting the rocking body 53 and the elevating body 56; and an operating member 5 for opening the planting body 44 at the ridge entry position.
8 and the actuating member 5 when the implant 44 is in the ridge entry position.
8 has an opening operation means 59 for performing an opening operation.

The planting body 44 is formed by the basic link 52, the swinging body 53, the upper and lower links 54 and 55, the elevating body 56 and the like.
And the descending orbit D descending from the seedling supply position to the ridge entry position
And link means 60 which rises rearward from the lower part of the descending trajectory D and intersects the descending trajectory D on the way and connects to the ascending trajectory U which is connected to the upper part through the front side. On the movable frame 26B, a drive shaft 66 to which power is transmitted via a transmission means from a second PTO shaft 19 protruding from the transmission case 5, and a power from the drive shaft 66 via a pair of gears 67A, 67B. The transmitted crankshaft 68 is supported.

A non-circular gear (or an eccentric gear) is used as the pair of gears 67A and 67B. A gear 67A eccentrically provided on the drive shaft 66 is a drive gear, and a gear 67B eccentrically provided on the crankshaft 68. Are driven gears, and these form a delay means 67. The delay means 67 determines whether the planting body 44 has a seedling receiving position and / or
Alternatively, when moving near the seedling receiving position, the drive arm 57 is driven so as to reduce the moving speed of the planted body 44 from other positions in order to more securely receive the seedling.

That is, at the time of the transfer of the seedlings above the elevating orbit of the planting body 44, the moving speed is locally reduced. Note that the delay means 67 may be configured such that an electromagnetic brake or the like is provided on the crankshaft 68 so as to brake the movement of the planted body 44 when receiving the seedling. The left and right crankshafts 68 are connected to each other via a universal joint. The crankshaft 68 is rotatable not only on the left and right sides of the movable frame 26B, but also on a support portion of a connecting body 70 connecting the left and right sides. Supported.

Each of the left and right crankshafts 68 has a drive arm 57 in the middle and has a crank shape. The front end of the upper link 54 is connected to an eccentric shaft 72 at the tip of the drive arm 57. The two substantially parallel foundation links 52 are each pivotally supported by a bracket 74 fixed to the movable frame 26B via a pin 73. The two pins 73 may be arranged substantially vertically, but the upper pin 73 is arranged at a slightly forward slant in front of the lower pin 73.

The rocking body 53 connects the tips of the two basic links 52 to each other via a pin 75, and connects the front end of the lower link 55 to the lower pin 75. A pin 76 is provided on the upper part of the rocking body 53 eccentrically from the upper pin 75 and slightly above the pin 75. Connected. That is, the upper link 54 is connected to the rocking body 53 above the connecting portion of the basic link 52.

Accordingly, the basic link 52 and the swinging body 53 constitute a four-joint link mechanism, and the upper and lower links 54 and 55 and the elevating body 56 constitute a four-joint link mechanism with the swinging body 53 as a reference. Is rotated together with the tip of the upper link 54, and the rocking body 53 is constrained by the basic link 52 that rocks substantially vertically, and controls the attitude of the upper link 54 via the protrusion 54A. The rear part of the upper link 54 is connected to the elevating body 56 via a pin 77 at the front upper part, and the rear part of the lower link 55 is connected via a pin 78 to the lower part separated therefrom.

The planting body 44 is formed in a beak shape having a tapered lower end, and is divided into a front cup 44F and a rear cup 44R. The front and rear cups 44F and 44R are respectively connected to pivot shafts 79F and 79R. Is provided, and is swingably supported by the elevating body 56 via the pivot shafts 79F and 79R. Although the front and rear cups 44F and 44R have an upwardly expanding shape, the rear wall of the rear cup 44R is closer to the vertical than the front wall of the front cup 44F. The angle of collision with the seedlings N is reduced so that the seedlings N are not damaged.

A front operating member 58F is provided on a pivot 79F of the front cup 44F, a rear operating member 58R is provided on the rear cup 44R, and an engaging pin 82 provided on the front operating member 58F is provided. Engaging groove 8 provided in rear operating member 58R
3 and the front operation member 58F is rotated, whereby the rear operation member 58R is rotated in the opposite direction via the engagement pin 82. A double link is provided between the front operating member 58F and the bracket 74. The double link includes a first link 84 whose front end is pivotally supported by the bracket 74,
There is a second link 85 for connecting the rear part of the first link 84 and the front operating member 58F. The position of the first link 84 that can be connected to the second link 85 can be changed.
Reference numeral 5 is configured to be adjustable in length.

The front and rear operation members 58F and 58R and the first and second links 84 and 85 constitute opening operation means 59. The opening operation means 59 is an operation member 58 (fore and aft) that moves up and down together with the elevating body 56. The posture of the operating members 58F, 58R) is controlled according to the elevating position to cause the planting body 44 to open and close. Reference numeral 87 denotes a detection switch for detecting that the plant 44 has reached the upper limit position.
And is operated by an operating piece 88 provided on the crankshaft 68.

The planting section 27 has a brake means provided between the crankshaft 68 and the movable frame 26B. Reference numeral 91 denotes a scraper means, which is provided with two scrapers 93 and 94 formed of an elastic plate such as rubber on a support 92 fixed to the movable frame 26B. The scraper 93 is provided with a bracket 9 at the front of the support 92.
5 and is fixed, and when the planting body 44 descends, it comes into sliding contact with the front surface of the front cup 44F to scrape off attached soil, mud, and the like.

The scraper 94 is attached to an L-shaped mounting member 97 which is pivotally supported on a support 92 via a support shaft 96. The mounting member 97 is provided by a spring fitted on the support shaft 96 as shown in FIG. Twelve are urged in the clockwise direction, and the stopper 99 abuts against the contact 100 to be set and held at the initial position. This scraper 94
In the state held in the initial position, when the planting body 44 rises from the lower limit position by sliding in contact with the rear surface of the rear cup 44R of the descending planting body 44 and descending from the lower limit position, It is introduced into the planting body 44 against 98A and 98B, and slides on the inner surfaces of the front and rear cups 44F and 44R to scrape off the attached soil.

Next, the planting body 44 by the planting drive mechanism 51
The details of the orbital motion and the mechanism of will be described. Running body 2 is ridge R
When the transplanter 1 is arranged in a state of straddling and the planting section 27 and the seedling supply section 28 are driven while running, the planted body 44 that has risen is stopped in the state of FIG. From this state, the clockwise rotation of the drive arm 57 further raises the ascending trajectory U to the upper limit position shown in FIG. The ascending trajectory U from the stop position to the upper limit position is inclined forward, moves along the trajectory K, and
The seedling N released from the seedling extraction nail 35A is substantially in line with the posture of the seedling extraction nail 35A of the seedling extraction tool 35 that has reached the upper side of the seedling extraction tool 35.
Is inserted along the front wall of the front cup 44F as much as possible, and collides with the rear wall of the rear cup 44R at an angle as small as possible. Although the planting body 44 receives the seedling N while rising to the upper limit position, the seedling N may be stopped at the upper limit position and received.

When the operation of the transplanter 1 is accelerated, the inertia force acts and braking by the braking means alone causes the transplant 4
Although there is a possibility that the deceleration / stopping of the driving arm 4 becomes difficult, the delay means 67 is operated from before and after the stopping position to halfway of the descending trajectory D, and the angular velocity of the driving arm 57 is reduced. When the seedling N is received from the seedling removal tool 35 while moving up to the upper limit position, the moving speed is sufficiently reduced, so that the inconvenience of the planted body 44 rising at a high speed and bouncing off the seedling N can be avoided. It is sufficient that the moving speed of the planting body 44 is sufficiently reduced when the seedling N is received after reaching the seedling receiving position, and a braking means for stopping the receiving is provided separately from the braking means for mainly obtaining the standby state. However, in order to make the continuous transplanting movement smooth and high speed, the non-circular gear delay means 67 is used to reduce the descending trajectory D from the vicinity of the seedling receiving position, for example, from the time when the brake means is operated. Ascending orbit U
It is most preferable that the movement speed of the plant body 44 be reduced and moved smoothly and with low resistance to the vicinity of the intersection with.

The planting body 44 includes the upper link 54 and the driving arm 5
When descending from the upper limit position where 7 overlaps, the descending trajectory D
Is slightly behind the ascending trajectory U, and moves to the front side of the ascending trajectory U via the orbital intersection and descends. At this time, the attached soil on the back surface of the plant body 44 is scraped off by the scraper 94, and the attached soil on the front surface of the plant body 44 is scraped off by the scraper 94. When the planting body 44 descends the descending trajectory D, the drive arm 57 is higher than the elevating body 56, the pin 75 is above the center line connecting the pins 73 and 78, and the base link 52 and the lower link 55 The upper side is bent upward in a side view, so that the plant body 44 moves forward of the ascending orbit U.

During the lowering, the lower end of the planting body 44 is
And the basic link 52 and the operating member 58 approach the horizontal state (the most extended state) to move the planting body 44 backward with respect to the movable frame 26B. Since the two links 84 and 85 do not extend, the front operating member 58F is swung, the rear operating member 58R is also swung via the engaging pin 82, and the planting body 44 is opened to release the ridge R.
And a seedling N conveyed to the planting hole is dropped and supplied. The plant body 44 makes a U-turn from descending to ascending at the lower limit position, and the base link 52 and the lower link 55
The open state is maintained until the time passes the straight line, so that the seedlings N planted on the ridges R are not pinched by the closing operation.

Since the traveling body 2 moves forward during the U-turn of the planting body 44, it does not form a U-shaped trajectory as shown in each figure. The position and the detached position are substantially the same or close to each other, and
4 rises without breaking the ridge R. The ascending trajectory U extends upward behind the descending trajectory D, and transitions from the orbital intersection to the front side. It has a shape and a flat shape, and is an orbit with an extremely short front and rear dimension as compared with an elliptical orbit.

After the planting body 44 shifts to the ascending stroke, the planting body 44 gradually fits into the scraper 94 from the upper portion, and scrapes off the mud adhered inside as the planting body 44 rises. Then, when the plant 44 reaches the orbital intersection or before or after it, the scraper 94 escapes from the lower end of the plant 44 and
Further, the implant 44 is in a closed state. The planting drive mechanism 51 has a length or swinging direction of the
3, the length and length ratio of the upper and lower links 54, 55, the length of the projection 54 A, the length of the drive arm 57, etc. Orbit D
Can be changed, and the position of the orbital intersection can be changed. The distance between the front and rear positions of the planting bodies 44 at the upper and lower portions of both the motion orbits U and D can be set as appropriate. The distance can be made sufficiently short, and high-speed transplantation can be performed without breaking the ridge R.

Next, the seedling feeding device 31 of the seedling supply section 28 will be described in detail with reference to FIGS. As shown in FIGS. 8 and 9, the seedling removal tool 35 includes a pair of seedling removal nails 3.
5A, a nail support 101 provided with a pair of seedling extraction claws 35A at the ends, a nail guide 102 for guiding the pair of seedling extraction nails 35A forward and backward, the nail support 101 and the nail guide 1
02 that supports the respective members 02 in a reciprocating manner in the longitudinal direction.
03. The seedling removal claw 35A is formed by processing a bar material such as a round steel into a needle shape (chopstick shape), pressing a plate material or the like, or forging.

The operating mechanism 36 reciprocates the seedling removal tool 35 between the seedling tray T and the planting body 44 while changing the posture. As shown in FIG.
6 includes a support 104 composed of a gear case and the like attached to a frame fixed on the fixed frame 26A. The support 104 is provided with a rotating shaft 107, and the rotating shaft 107 is provided with a first PTO. By the rotational power from the shaft 18, it is driven to rotate around the axis in the left-right direction and counterclockwise in FIG. 6.

A crank body (drive body) 106 is fixed to the rotating shaft 107. A crank pin (engagement body) 108 is provided on the crank body 106 so as to protrude laterally, and is provided on the outer peripheral surface thereof. A cam portion (separation cam portion) 109 is formed. In addition, the lower portion of the swing arm 111 is provided on the support 104 with the swing shaft 11 below the crank body 106.
The swing arm 111 is rotatably connected to the left and right directions about an axial center, and is supported so as to be swingable back and forth (close to and away from the seedling tray T).

Further, a groove cam 113 extending in the vertical direction (arm longitudinal direction) is formed in the middle of the swing arm 111, and the crank pin 108 of the crank body 106 is inserted into and engaged with the groove cam 113. . Also, the cam portion 10 is provided on the front side of the middle part in the vertical direction of the swing arm 111.
A cam follower 114 abutting on the cam follower 9 is provided. The cam follower 114 is formed by fitting a bearing to a pin. As shown in FIG. 7, the groove cam 113 is constituted by cam surfaces A to F, the crank body 106 is rotated by a rotation shaft 107, and the crank pin 1
08 is on the inner peripheral surface of the groove cam 113, A → B → C → D → E →
By contacting in the order of F, the seedling removal nail 35A
Pierces the bed soil of the seedling N in the pot portion P, retreats from the seedling tray T, removes the seedling N from the pot portion P, and removes the removed seedling N from above the planting body 44 at the seedling receiving position (seedling). The seedling N is released to the planted body 44 after being transported to the seedling body 44 and the seedling N is released. Then, the seedling removal nail 35A or the like is operated to return to the original position. The seedlings N of T are supplied to the planting section 27 one by one.

That is, the moving stroke of the tip of the seedling removal nail 35A is determined corresponding to each part of the strokes A to F.
Point P1 is the boundary between the F and A strokes, point P2 is the boundary between the A and B strokes, point P3 is the boundary between the C and D strokes, point P4 is the boundary between the D and E strokes, and point P4 is the boundary between the E and F strokes. The boundary is labeled as point P5. A
The process is a seedling piercing process, the process B is a seedling removal tool separating process, the process C is a forward process, the process D is a deceleration connecting process,
E process is a seedling removal claw stop stroke part (seedling removal claw stop part 13
8) The F stroke is a return stroke portion.

The holding body 103 is provided above the swing arm 111.
Are rotatably connected via a pin 115 around a left-right axis. The holding member 103 is formed in a cylindrical shape at a portion where the pin 115 is provided, and a cylindrical claw support 101 is guided through the cylindrical portion so as to be movable in the axial direction. Reference numeral 101 indicates that the seedling tray T can move forward and backward. Further, a pair of seedling removal claws 35 </ b> A, which are pierced obliquely into the seedlings N in the pot portion P, are attached to the distal end portion of the nail support 101.

As shown in FIGS. 8 and 9, a roller 117 is attached to the holding body 103 via a support shaft 116 so as to be freely rotatable around a left-right axis.
Is engaged (fitted) with a cam groove 119 formed in the guide member 118. On the other hand, as shown in FIG. 6, a mounting body 120 is fixed to the upper part of the support body 104 by bolts or the like. Is provided. This support shaft 8
9, a cylindrical portion 118A provided at a rear portion of the guide member 118 is externally fitted so as to be rotatable around an axis, and a front portion of the guide member 118 is provided with an angle adjuster 121 having a turnbuckle structure. The guide member 118 is tilted around the axis of the support shaft 89 by changing the length of the angle adjuster 121 so that the angle of the cam groove 119 can be changed. It has become.

With the cam groove 119 of the guide member 118,
When the roller 117 of the seedling removal tool 35 is guided (by movement of the roller 117 in the cam groove 119), when the seedling removal tool 35 advances toward the pot portion P, the leaf of the seedling N is placed downward. Seedling removal tool 3
5 and the posture of the holder 103 (particularly, the relative angle of the holder 103 with respect to the swing arm 111) according to the swing angle of the swing arm 111 is controlled. When transferring the seedlings N taken out of the pot portion P to above the planted body 44, the tip side of the seedling removal tool 35 is largely moved downward and changed to a substantially downward posture (see FIG. 1). Bring N closer to the vertical position.

For this purpose, the rear side of the cam groove 119 (FIG. 6)
On the left), the roller 117 is connected to the swing shaft 1 of the swing arm 111.
12 is moved in a direction away from it. As shown in FIGS. 8 and 9, on the outer periphery of the claw support 101, between the base 124 provided at the base end of the claw support 101 and the cylindrical portion of the holder 103, a claw support is provided. A coil spring 125 for urging the seedling 101 in the retreating direction with respect to the seedling tray T is interposed, and a nail mounting tool 126 is fitted and fixed to the distal end side of the nail supporting body 101.

The bases of the pair of seedling removal claws 35A are pivotally supported by the claw attachments 126 via shafts 127 (or the bases of the seedling removal claws 35A are bent at right angles as shafts). The pair of seedling removal claws 35 </ b> A are swingable such that the tips move far and near with respect to the claw attachment 126.
An extruding link 128 is rotatably connected to the lower end of the holder 103 via a pin 129. A long groove (or long hole) 130 is formed at the tip of the push-out link 128, and a pin 131 provided on a protruding arm of the claw attachment 126 is engaged with the long groove 130.

The extrusion link 128 is provided with a substantially arc-shaped cam body 132, and this cam body 132 is
06 can be brought into contact with the crankpin 108. When the swing arm 111 reaches the swing end on the side of the seedling tray T when the crank pin 108 corresponds to the later stage of the F stroke, the pushing link 128 is rotated via the cam body 132 by the rotating crank pin 108. When the push-out link 128 is pushed, as shown in FIGS. 8 and 9, the claw attachment 126 and the claw support 101 are moved to the seedling tray T as shown in FIGS. Pushing toward the side compresses the coil spring 125.

As a result, the seedling removal nail 35A protrudes and penetrates the bed soil of the seedling N in the pot portion P, and the nail support 10
1 will have the restoring force for retreating. The push-out link 128 is provided with a stopper 133 facing the cam body 132. The stopper 133 is engageable with the crank pin 108 (see FIG. 7), and regulates the push-out link 128 to jump out. . When the transplanting operation is accelerated, the crank pin 108 urges the cam body 132 vigorously, so that the seedling removal nail 3
A large inertial force acts on the protrusion of 5A, and the seedling removal claw 35A
There is a possibility that the tolerances accumulate in the pushing direction, so that the seedling removal claw 35A may reach the bottom of the pot portion P. By restricting the inertial motion, the seedling removal claw 35A can be stopped at the regular seedling insertion position (piercing depth).
The play in the 5A seedling insertion direction is also reduced.

The claw guide 102 is formed of a round bar or the like, and includes the claw support 101, the base 124, and the claw attachment 1.
26 is slidably inserted in the longitudinal direction. Further, the nail guide 102 has a guide groove on its tip end side through which the seedling extraction nail 35A can be inserted (has a function of guiding the seedling extraction nail 35A). 35A, an L-shaped plate-shaped operating member 135 is mounted on the rear end side, and a stopper 13 is provided in the middle.
6 is fixed, and a spring 137 is fitted between the stopper 136 and the base 124.

The seedling releasing tool 134 has two claw grooves 134.
a is formed, and the interval between the left and right claw grooves 134a is set to be smaller than the interval between the pivots of the left and right seedling removal claws 35A (the interval between the shafts 127 serving as the pivots). Therefore, the seedling removal nail 35A
When the nail guide 102 (seedling release tool 134) moves relatively, the distance between the nail tips of the seedling removal nail 35A changes. That is, when the seedling releasing tool 134 is located on the tip side of the seedling removing nail 35A, the distance between the nail tips is the widest, and the seedling releasing tool 1 is changed from this state.
When the seedling removal claw 35A is protruded with the 34 kept stationary, the base side of the seedling removal claw 35A approaches the seedling releasing tool 134, and the distance between the claw tips gradually decreases.

Thus, in order to take out the seedling N from the pot portion P (to pierce the seedling removal nail 35A into the bed soil of the seedling N),
When the seedling extraction nail 35A is advanced, the left and right seedling extraction nails 3
The tips of 5A approach each other while protruding, and move on a substantially linear orbit inclined with respect to the left and right center lines of the seedling N. When the seedling release tool 134 of the nail guide 102 is moved from the position located at the base side (the rear side of the seedling N) of the seedling extraction nail 35A to the distal end in a state where the seedling is extracted with the seedling extraction nail 35A, The distance between the tips increases from a narrow state to a wider state, and in parallel with this, the seedling releasing tool 134 comes into contact with the seedling N to push (release) the seedling N from the seedling extraction nail 35A.

At this time, the tip of the seedling removal claw 35A with respect to the seedling N comes off substantially in the same trajectory as the trajectory that has entered, so that damage to the seedling N at the time of entry and detachment is minimized. The seedling removal claw 35A is on the front surface side (the opening edge side of the pot portion P) with respect to the center line of the seedling N in the pot portion P when viewed from the front.
The seedling N has a substantially truncated quadrangular pyramid shape, so that two seedlings are taken out from two corners below the surface to the center of the bottom surface. Since the nail 35A is pierced, the leaves and roots of the seedling N are not pierced, and in addition, the tips of the left and right seedling extraction nails 35A are narrowed, so that they do not collide with the vicinity of the bottom of the pot portion P. .

An operating piece 141 is pivotally supported on the holding body 103 via a shaft 142 having a left-right axis so as to be rotatable around the axis, and is urged clockwise in FIG. The operating piece 141 has a substantially T-shape having one foot and left and right arms, a lock portion 141A on the left arm, a release portion 141B on the right arm, and a pushing portion 141C on the foot. Is formed. The operating member 135 fixed to the claw guide 102 has a contact portion 135A parallel to the claw guide 102, and the contact portion 135A is slidable in the moving direction of the claw guide 102 by the holding body 103 in a detented state. Operating piece 1 which is guided by
41 is engaged with the lock portion 141A of the claw guide 1.
02 is restricted from moving in the protruding direction,
As a result, the nail support 101 is
Are relatively capable of moving forward.

A lock arm 143 is pivotally supported on the base 124 at the rear end of the claw support 101. The lock arm 143 is urged clockwise in FIG. 143a, an inclined surface 143b, and a projection 143c that can be engaged with the engaging portion 103a. When the claw support 101 protrudes (the seedling removal claw 35 pierces the soil of the seedling N), the engaged portion 143a of the lock arm 143 engages with the engaging portion 103a of the holding body 103, thereby causing the The state is maintained, and the operation piece 141 is rotated in the counterclockwise direction in FIG. 8, whereby the lock of the operation member 135 by the lock part 141A with respect to the contact part 135A is released, and the claw guide 1
02 protrudes.

As the nail guide 102 protrudes, the seedling releasing tool 134 relatively moves from the rear surface of the seedling N toward the tip of the seedling extracting nail 35A as described above, and the seedling extracting nail 35A is moved.
Is released.
Further, when the claw guide 102 protrudes, the operating member 135
Contact portion 135A comes into contact with the inclined surface 143b, whereby the engaged portion 143a is separated from the engaging portion 103a,
Even if the detachment is incomplete, the release piece 141B pushes up the protrusion 143c by further rotating the operation piece 141, and forcibly detaches the engaged part 143a from the engaging part 103a.

It should be noted that the engaged portion 143a is
When it comes off, the nail support 101 retreats with the nail guide 102 and returns to its original position. The actuating member 135 and the actuating piece 141 constitute a means for regulating the seedling releasing operation of the seedling releasing member. In addition, the seedling feeding device 31 includes a means 1 for rotating the operating piece 141 and activating the seedling release tool 134 to release the seedling N from the seedling removal claw 35A.
50 are provided.

As shown in FIGS. 1 to 6, the activation means 150 includes an operating body 151 for rotating the operating piece 141 to release the regulation of the seedling releasing operation of the seedling releasing tool 134, and the operating body 151. And a cam 152 to be operated. The operating body 151 has a main configuration in which first and second arms 154 and 155 protrude from a cylindrical support portion 153.
The support portion 153 is externally fitted to the cylindrical portion 118A of the guide member 118 so as to be relatively rotatable around the axis, so that the operating body 151 is fixed to the fixed frame 26A (the support body 10A).
4) and the like.

The first arm 154 projects obliquely downward, and is formed of a roller or the like at the tip end.
Is provided with an engaging portion 156 which comes into contact with the outer peripheral surface. The second arm 155 extends rearward and then extends upward, and a release portion 157 capable of contacting the pushing portion 141C of the operating piece 141 is provided on the distal end side. Cam 152
Includes a cylindrical portion 158 attached to the rotating shaft 107 so as to rotate integrally around the axis, and an engaged portion 159 provided on the outer peripheral surface of the cylindrical portion 158 so as to protrude radially outward. ing.

Further, between the mounting body 120 and the second arm 155, the engaging portion 156 of the first arm 154 is
A spring 160 (biasing means) for biasing the operating body 151 is provided so as to contact the outer peripheral surface of the actuator 2 (to rotate clockwise in FIG. 6). In the starting means 150 having the above configuration, the engaging portion 156 of the first arm 154 is
When the engaging portion 156 rides on the engaged portion 159 while the cylindrical portion 158 is in contact with a portion other than the engaged portion 159 of the cylindrical portion 158 (the engaging portion 156 When pressed, the operating body 151 rotates counterclockwise in FIG. 6 (in the direction of arrow G), and when the engaged portion 159 comes off the engaging portion 156, it is returned to the original position by the spring 160. It has become.

When the seedling N is conveyed to the seedling release position above the planted body 44 at the seedling receiving position, the pushing portion 141C of the operating piece 141 is moved by the release portion 157 of the second arm 155. It is located on the lower side, and as described above,
When the engaging portion 156 rides on the engaged portion 159, the operating body 151 rotates in the direction indicated by the arrow G in FIG. 6, and the releasing portion 157 pushes the pushing portion 141C to rotate the operating piece 141. Then, the seedling N is released from the seedling removal nail 35A. This operation will be described in detail in a seedling removal and release operation described later.

Note that the second arm 155 is
The main body 155A is fixed to the main body 155A, and a mounting piece 155B is mounted and fixed to a distal end side of the main body 155A with a bolt 161 and a nut.
Is provided with a release unit 157. Also, the mounting piece 155
B (or main body 155A), bolt 161
Is formed in a long hole, and the relative position of the release portion 157 with respect to the operating piece 141 when the seedling removal tool 35 adopts the seedling release posture shown in FIG. 1 can be adjusted. I have.

Further, the attachment member 120 is provided with the stopper member 1.
47 are provided, and the stopper 133 can be brought into contact with them, and these form an operation suspending means 149. The stop member 147 is formed of a bolt or the like, and is capable of adjusting the contact position with respect to the stopper 133.
The movement of the push link 128 is prevented by contacting the stopper 133, and the movement of the seedling removal claw 35 </ b> A and the claw guide 102, which has started to return after detaching the engaged portion 143 a from the engaging portion 103 a, is stopped and suspended. 108 passes through the seedling removal claw stop 138 (seedling removal member stop), which is the E stroke of the groove cam 113, and after the planted body 44 has descended to some extent, the seedling removal claw 35A and the claw guide 102 are returned. It has become.

As a result, it is possible to prevent the foliage of the seedling N transferred to the planting body 44 from being damaged by the return operation of the seedling removal nail 35A and the seedling releasing tool 134 of the nail guide 102. In addition, instead of the stopper 133, the push link 1
28 may be provided with a member that contacts the stop member 147.
The holding body 103, the crank body 106, the cam portion 109,
Swing arm 111, guide member 118 and push-out link 1
28 and the like, supporting the nail guide 102 and the nail support 101, etc., and moving while changing the attitude from the seedling removal attitude toward the pot portion P of the seedling tray T to a substantially downward seedling detaching attitude toward the planting body 44, An operation mechanism 36 is configured to take out the seedlings in the seedling removal posture and drop the seedlings in the seedling detachment posture.

The operating piece 1 having the lock portion 141A
41, when the claw guide 102 is moved to the claw tip side by the operating member 135 and the lock arm 143, etc.
Return interlocking means 145 for simultaneously retreating the pawl guide 102 and the claw guide 102, and the operating piece 14 having the release portion 141B.
1 and the lock arm 143 constitute a return ensuring means 146 for guaranteeing the return operation of the claw support 101 after the operation of the return interlocking means 145. Next, the seedling removal and release operations of the seedling removal tool 35 by the operating mechanism 36 and the operating mechanism 3
6 will be described in detail.

As shown in FIG. 10, the seedling removal operation is performed with respect to the seedlings N in the pot portion P of the seedling tray T.
And a step F in which the seedling removal claw 35A is moved forward in an inclined state with respect to the center line of the seedling N without moving the holding body 103 and the claw guide 102 while scooping the seedling N from the lower side of the leaf. A process for injecting the seedling N into the floor soil; the seedling N which has been pulled away from the seedling tray T and pierced.
B step of retreating the pot portion P while slightly lifting it up, and changing the posture of the seedling extraction tool 35 and moving it from the position facing the seedling tray T to a substantially downward position facing the planting body 44. C step; and D step of gently moving the seedling removal tool 35 to the maximum swing position; and a state where the seedling removal tool 35 (the seedling removal claw 35A) is stopped at the maximum swing position and the seedling removal claw 35A is stopped. E (a swing stop process) in which seedlings are released from the seedling removal nail 35 at the same time; and a seedling removal nail 35A.
And an F stroke for returning the seedling removal tool 35 from a substantially downward position to a position facing the seedling tray T while retracting the claw guide 102.

In the F stroke, the position where the holder 103 is almost closest to the seedling tray T, that is, the position where the tip of the seedling releasing tool 134 approaches the seedling tray T while scooping up the leaves of the seedling from below. Until the swing of the swing arm 111 is decelerated, the crankpin 108 starts to contact the cam body 132 from the latter half of the F stroke. In process A, point P
From 1, when the crank pin 108 rotates in the arc portion of the seedling piercing stroke portion of the groove cam 113 of the swing arm 111, the swing arm 111 does not swing and remains stationary, and the crank pin 108 causes the cam body 132 to move. The pushing link 68 is pushed around the pin 129 via the center, and the nail support 101 and the seedling removal nail 35A are advanced toward the seedling in the pot part P via the nail attachment 126.

For this reason, the late stage of the raising of the seedling removal claw 35A and the initial stage of the forward movement are overlapped, and the trajectory at the point P1 is arc-shaped, and the seedling removal at the point P1 is smaller than the case of moving forward after rising. The claw 35A is slightly separated from the leaves of the seedling N, and the movement speed does not decrease so much, and the movement is smooth. At this time, the claw guide 102 is moved to the operation member 135.
Are in contact with the operation piece 141 and are immobile,
Advance, the springs 125 and 137 are compressed, and the engaged portion 143a of the lock arm 143 engages with the engaging portion 103a of the holding body 103, and the claw support 101
And the returning operation of the seedling removal claw 35A is prevented.

Since the seedling removal claw 35A moves forward with respect to the stationary nail guide 102, a pair of right and left seedling removal claws 35A is provided.
Is restricted by the claw groove 134a which is narrower than the pivot interval, and the tip of the seedling removal nail 35A pierces the seedling while advancing forward and narrowing the distance between the nail tips. The piercing direction of the seedling removal nail 35A is inclined with respect to the center line of the seedling N, becomes substantially parallel to the wall surface of the pot portion P, and does not pierce the stem and root of the seedling N. In this piercing state, the left and right seedling removal claw 35A
Changes from a wide V shape to a narrow V shape (the state of FIG. 9).

The V-shaped state of the seedling removal claw 35A is because the seedlings are less likely to come off than in the case of the parallel shape and can be taken out strongly from the pot portion P, and the seedlings are not pinched at the time of change. No damage to the seedlings. When the crank body 106 rotates after the seedling N is pierced by the seedling removal claw 35A, the swing arm 111 swings to the left in FIG.
A and the nail guide 102 are both retracted from the seedling tray T and separated from the pot P by the seedling N (B stroke).

The trajectory of the seedling removal claw 35A piercing and separating is a substantially V-shaped trajectory. Then, the trajectory K moves on the forward movement trajectory. Since the groove cam 113 is in the opposite direction to the arc of the A stroke in the B stroke, the swing arm 111 is rotated at a high speed.
Will rock. The A-stroke portion and the B-stroke portion of the groove cam 113 are portions facing the seedling removal claw stop portion 138 in the E-stroke, and both portions are wider than the diameter of the crankpin 108. 7 so that the claw stopper 138 comes into contact with the crankpin 108.
Is biased clockwise.

Therefore, the crank body 106 is moved so that the swing arm 111 obtains movement corresponding to the A stroke and the B stroke.
Is formed, and the cam portion 109 comes into contact with the cam follower 114 to stop the swinging of the swing arm 111 when the seedling removal claw 35A pierces the seedling N, and the seedling removal claw 35A is potted. The swing arm 111 is pulled away from the seedling tray T when it is extracted from the portion P. Therefore, in the cam portion 109, the A stroke portion of the groove cam 113 and the B stroke portion
The swing portion can be substituted for the swing arm 111.
Can be applied in both forward and reverse directions by an unstable switching spring or the like, and the A and B stroke portions and the cam portion 109 can be cooperated, or the cam portion 109 can be omitted.

In the movement of the trajectory K on the forward trajectory, the holder 1
In FIG. 3, a roller 117 provided thereon is guided by a cam groove 119 of a guide member 118, whereby the seedling removal claw 35A and the claw guide 102 are moved from a nearly horizontal removal posture in FIG.
And the seedling N is located at the seedling release position (stroke C). The starting point of this C process is that the seedling removal nail 35A is in the pot portion P and the seedling N is
During the removal from the pot, ie, halfway through the depth of the pot portion P and before the seedling N completely comes out of the pot portion P, the posture change of the seedling removal claw 35A in the C stroke to a substantially downward posture and the planting body 44 are performed. The transition to the side may begin.

The change in the posture of the seedling removal claw 35A in the C-stroke is achieved by the cam groove 119 having an upright shape on the left side of FIG. 1, and the starting point of the C-stroke is the ascending start point of the cam groove 119. Can be adjusted by changing. In the C stroke, the groove cam 113 is in the opposite direction to the arc of the A stroke, and at the beginning of the transition of the C stroke, swings the swing arm 111 at a high speed. , The swing speed of the swing arm 111 is reduced to a low speed over time.

The D stroke is a period for smoothly connecting the C stroke and the E stroke. In the E stroke, the groove cam surface is the rotation shaft 107.
The swing arm 111 stops, and the movement of the seedling removal claw 35A is stopped. Further, since the D stroke forms a smooth surface with the final portion of the C stroke, the swing arm 111 is substantially stopped, that is, the D stroke is stopped.
In the stroke, the tip of the seedling removal claw 35A is decelerated to a substantially stopped state. As described above, the portion of the groove cam 113 in the E stroke is the seedling removal nail stop portion 138, and the seedling removal nail 35
In the state where the movement of the seedling removal claw 35A is stopped and the movement of the seedling removal nail 35A is stopped, the seedling N held by the seedling removal nail 35A is stopped.
Is released to the implant 44.

Therefore, the groove cam 1 of the swing arm 111
A stop means for stopping the seedling removal nail 35A at the seedling release position is constituted by the thirteen seedling removal nail stop portions 138 and the like. That is, as shown in FIGS. 1 to 3, when the crank pin 108 shifts from the D stroke to the F stroke, the pushing portion 141 </ b> C of the operating piece 141 is moved downward to the release portion 157 of the second arm 155 of the activation means 150. Approach (or touch) from At this time, the engaging portion 159 of the cam 152 is
Of the rotation shaft 107 (in the direction indicated by the arrow H in FIG. 2).

When the movement of the seedling removal claw 35A is stopped, the cam 152 is further rotated, and the engaging portion 156 rides on the engaged portion 159 as shown in FIG. The body 151 rotates in the direction indicated by the arrow G in FIG. 6, and the release unit 157 moves in the direction indicated by the arrow J in FIG. 3, whereby the release unit 157 causes the pushing unit 141C to move as shown in FIG. When the push member is pushed to rotate the operation piece 141, the lock portion 141A releases the lock of the operation member 135, and the claw guide 102 is resiliently protruded by the spring 137 which has been compressed, and the seedling release tool 134 Moves forward toward the tip of the nail with respect to the immovable seedling removal nail 35A, and pushes out the pierced seedling N to be released (released).

The seedling releasing tool 134 of the nail guide 102 is brought into contact with the shoulder of the floor soil of the seedling N on a large surface without damaging the seedling N. It falls toward 44 and is delivered. At this time, the plant 44 has reached the upper part of the ascending stroke, and the moving speed has been reduced or stopped. In the above operation, since the release portion 157 moves to release the movement restriction in the projecting direction of the seedling releasing tool 134 without moving the seedling removing claw 35A, the release of the seedling N can be performed in a stable direction. Thus, the transfer of the seedlings N from the seedling removal nail 35A to the planting body 44 can be reliably performed.

For long shoots such as onion seedlings, the planting material 4
When the seedling removal tool 35 is returned and operated in a state where the seedlings N are stored in the seedling 4, the seedling removal claw 35A may come into contact with the seedlings N and cause damage, but the planted body 44 descends to a certain position. During this time, the seedling removal tool 35 stops moving in the E process, so that the seedling removal claw 35A can be prevented from contacting the seedling N. When the claw guide 102 is protruded, the unlocked operating member 135 moves integrally, and the contact portion 135A contacts the inclined surface 143b of the lock arm 143 to engage with the engaged portion 143a and the engaging portion. After the engagement of the stopper 103a is released and the crank pin 108 passes through the seedling removal claw stop stroke portion 138 (E stroke) of the groove cam 113, the stop member 14 is stopped.
7. The nail support 101 held in a protruding state by 7
Is elastically retracted by the spring 66 in the compressed state.

At this time, since the operating member 135 at the rear end of the claw guide 102 is in contact with the back surface of the base 124, the claw guide 102 is also retracted with the retraction of the claw support 101,
Since both of them retreat quickly by the spring 66, the contact of the claw guide 102 with the leaf of the falling seedling N is avoided as much as possible. Further, for some reason such as the movement resistance of the claw guide 102 being too large, the contact portion 135A is
If the inclined surface 143b cannot be lifted, the lock arm 143 is rotated via the protrusion 143c by the release portion 141B of the operation piece 141 (operation of the return ensuring means 146).
Then, the engaged portion 143a is forcibly disengaged from the engaging portion 103a to ensure the retreat of the seedling removal claw 35A.

Thus, even if the seedling N on the seedling removal nail 35A cannot be released by the nail guide 102, the seedling removal nail 35A retreats and comes off the seedling N by hitting the nail guide 102. . With this, seedling removal nail 35A
The claw guide 102 and the claw guide 102 both return to the retracted position, and the operating member 1
35 becomes a lockable state. From this state, the rotation of the crank body 106 swings the swing arm 111 rightward (F stroke), moves the holding body 103 while changing the posture, and moves the seedling removal tool 35 to the backward movement locus of the trajectory K. Let it go back on top.

The circumferential speed of the trajectory K of the seedling removal tool 35 and the reciprocating speed of the trajectories U and D of the planting body 44 are sufficiently higher than those of the prior art (for example, the moving speed of the running body 2 is equal to the walking speed of human beings or (More than that), at the time of seedling delivery, before and after, especially after the delivery of the seedling, etc., locally reduce the moving speed to ensure the necessary operation and not to damage the foliage of the seedling. ing. As shown in FIGS. 15 to 18, the front wheel 9 is attached to the rear end side of the support arm 12 by a mounting device 163 so as to be adjustable in angle, and the front wheel 9 is provided with a scraper 164.

The mounting device 163 includes a base 165 fixed to the support arm 12, a support wall 166 provided above and below the base 165, and a support shaft 167 provided so as to penetrate the upper and lower support walls 166. And the upper and lower support walls 16
A cylindrical shaft 168 that is rotatably fitted to the support shaft 167 around the axis thereof between the six shafts, a pair of mounting pieces 169 in the radial direction fixed to the cylindrical shaft 168, and screws formed on each of the mounting pieces 169. Hole 1
The adjusting bolt 170 includes an adjusting bolt 170 that is screwed to the adjusting bolt 170 and a lock nut 171 that is screwed to the adjusting bolt 170.

The mounting device 163 is provided such that the axis of the support shaft 167 is inclined in such a manner as to shift upward as it goes forward, and the axle 1 that supports the front wheel 9 in a freely rotatable manner.
One end of the 73 is fixed to the cylindrical shaft 168 by welding or the like so that the axial direction is orthogonal to the axial direction of the support shaft 167. The adjusting bolt 170 has an axis parallel to the axle 173. The head 170a of the pair of adjustment bolts 170 contacts the base 165, so that
The rotation of the front wheel 9 and the front wheel 9 around the support shaft 167 is restricted.

In the mounting device 163 having the above-described structure, one of the adjusting bolts 170 is screwed and the other is screwed out, so that the support shaft 1 of the axle 173 and the front wheel 9 is rotated.
The direction about the axis of 67 is changed, and the angle of the front wheel 9 with respect to the traveling direction and the vertical direction can be adjusted. As a result, the straightness of the traveling body 2 can be improved. One end of the scraper 164 is attached to a mounting member 175 fixed to one end of the axle 173 by bolts 176 and nuts 1.
The other end of the scraper 164 is attached to the other end of the axle 173 by bolts 178.

The bolt insertion holes 179 and 180 formed on the other end side of the mounting member 175 and the scraper 164 are formed as long holes, and the scraper 164 can be adjusted to approach and separate from the tread surface of the front wheel 9. ing. When the onion transplanting machine 1 is planted when the field is moist, soil adheres to the front and rear wheels 9 and 10. The rear wheel 10 is made thinner and the foil is changed to a spoke type to eliminate the adhesion of soil, while the front wheel 9 is a tire to which soil adheres.

Further, the left and right sides of the multi-film for covering the ridges are covered with soil. If the covered soil adheres to the front wheel 9, the multi-film may be peeled off by the wind. This solves this problem. Note that the present invention is not limited to the above embodiment, and can be variously modified. For example, the transplanter 1 shows a walking type, but may be a riding type,
Delay means 67, separation cam part 109, swing stop part 13
8, the stopper 133, the operation suspending means 149, and the like, may be applied to one transplanter 1 alone or in an appropriate combination.

[0097]

According to the present invention described in detail above, seedlings are released from the seedling removal member in a state where the seedling removal member is stopped, so that the release direction of the seedlings is constant, and The seedlings can be reliably transferred from the plant to the planting section.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling delivery device.

FIG. 2 is a side view of a part of the activation unit.

FIG. 3 is a side view of a part of the activation means.

FIG. 4 is a side view showing an operation state of a part of the activation means.

FIG. 5 is a side view showing an operation state of a part of the starting means.

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

FIG. 7 is a side view of a part of the operation mechanism.

FIG. 8 is a side view of the seedling removal tool.

FIG. 9 is a plan view of the seedling removal tool.

FIG. 10 is a side view showing a relationship between a seedling removal tool and a planting section.

FIG. 11 is a side view showing a relationship between a seedling removal tool and a planting section.

FIG. 12 is a side view of the planting section.

FIG. 13 is a side view of the transplanter.

FIG. 14 is a plan view of the transplanter.

FIG. 15 is a developed plan view of a front wheel.

FIG. 16 is a side view of a front wheel.

FIG. 17 is a sectional view of a support portion of the front wheel.

FIG. 18 is a side sectional view of a support portion of the front wheel.

FIG. 19 is a side view of a conventional seedling feeding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transplanting machine 27 Planting part 35A Seedling removal claw (seedling removal member) 36 Operating mechanism 106 Crank body 108 Engaging body (crankpin) 111 Swing arm 113 Groove cam 118 Guide member 134 Seedling release tool 138 Seedling release claw stop part ( Seedling release member stop part) 150 Starting means 151 Operating body 152 Cam 156 Engagement part 157 Release part 159 Engaged part N Seedling P Pot part T Seedling tray

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mamoru Yasumatsu 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture F-term in Kubota Sakai Works Co., Ltd. (Reference) 2B060 AA06 AC01 AD07 AE01 BA03 BB05 CA05 CB06 CB17 CB25 CB29 CC05

Claims (6)

[Claims] A seedling removal member is operated to take out a seedling in a pot portion of a seedling tray and transport the seedling to a seedling release position. At this seedling release position, a seedling is released from the seedling removal member to a planting section. The seedling transfer device for a transplanter according to claim 1, wherein the seedling removal member discharges seedlings in a state where the seedling removal member is stopped. 2. A seedling removal member is pierced into a seedling in a pot portion of a seedling tray, and then the seedling removal member is retracted from the seedling tray to take out the seedling from the pot portion. A transplanter that transports and moves the seedling release tool from the back of the seedling toward the tip of the seedling removal member at the seedling release position, thereby releasing the seedling from the seedling removal member to the planting section. The seedling feeding device for a transplanter according to claim 1, wherein the seedling releasing tool is moved to release the seedlings with the seedling removal member stopped. 3. A seedling extracting member, and after the seedling extracting member is advanced with respect to a seedling tray and pierced into a seedling in a pot portion,
By retracting the seedlings from the seedling tray, the seedlings are taken out from the pot portion, and an operation mechanism for operating the seedling removal member so as to convey the taken-out seedlings to the seedling releasing position, and a seedling from the back of the seedling at the seedling releasing position. A seedling removal device for a transplanter, comprising: a seedling release tool that releases a seedling from the seedling removal tool to the planting section by moving toward the tip of the removal tool. A seedling of a transplanting machine, comprising: a stopping means for stopping the seedling; and a starting means for starting the seedling releasing tool so as to move the seedling releasing tool to release the seedling while the seedling extracting member is stopped. Delivery device. 4. The transplant according to claim 3, wherein the starting means comprises an operating body for releasing the regulation of the seedling releasing operation of the seedling releasing member, and a cam for operating the operating body. Machine seedling feeding device. 5. An actuating body includes a release portion on one end side for engaging a means for restricting a seedling releasing operation of a seedling releasing member to release the regulation, and an engaging portion for engaging with a cam on the other end side. The cam is engaged with the engaging portion of the operating body in a state where the seedling extracting member is located at the seedling releasing position and stopped, and the cam is released. 5. The seedling feeding device according to claim 4, further comprising an engaged portion that swings the operating body so that the portion engages with a unit that regulates a seedling releasing operation of the seedling releasing member. 6. apparatus. 6. An operating mechanism, comprising: a swing arm that supports a seedling removal member and swings so as to approach and separate from a seedling tray; a driving body that swings the swing arm by rotation; A guide member for controlling the attitude of the seedling removal member therein, and the swing arm has a groove cam that engages with an engaging body of a driving body that moves in a circular motion and converts a rotational motion into a swing motion,
The seedling feeder of a transplanting machine according to claim 3, wherein the groove cam is provided with a seedling removal member stop portion for stopping the seedling removal member at the seedling discharge position.