JP2007053985A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that the efficiency of a work for individually putting preliminary seedlings one by one on preliminary seedling-putting portions vertically disposed at multistage is extremely low, and also a problem that the low efficiency of the work for putting the preliminary seedlings lowers the total work efficiency of the seedling-transplanting work, because the work for putting the preliminary seedlings needs the interruption of the seedling-transplanting work. <P>SOLUTION: This seedling transplanter on whose travel vehicle body 10 a transplanting apparatus 9 and a preliminary seedling-putting apparatus 50 are mounted is characterized by disposing fixed seedling-putting tables 64 for putting seedling-holding frames 51 for receiving a plurality of seedling boxes C in the preliminary seedling-putting apparatus 50, disposing vertically movable putting tables 66 capable of being fixed at upper positions or lower positions with link mechanisms 65 above the fixed seedling-putting tables 64, disposing upward or downward operation tools 67 on the vertically movable putting tables 66, and disposing fixing or canceling operation tools 73 for fixing the vertically movable putting tables 66 or canceling the fixation of the vertically movable putting tables 66 at places close to the upward or downward operation tools 67. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a seedling transplanter equipped with a preliminary seedling placement device.

2. Description of the Related Art Conventionally, there is a riding pot Naeda transplanter in which a spare seedling placement device having a multistage preliminary seedling placement part is provided rotatably on the front left and right sides of the body.
Japanese Patent Laid-Open No. 9-238515

  The preliminary seedling placement device disclosed in the above publication is rotatably provided so that the placement and removal of the preliminary seedling can be easily performed. The work of placing the spare seedling is very inefficient, and the work of placing the spare seedling is performed by interrupting the seedling transplanting work. The work efficiency was worsened.

  According to the first aspect of the present invention, in the seedling transplanting machine in which the traveling device 10 is mounted with the transplanting device 9 and the preliminary seedling mounting device 50, the preliminary seedling mounting device 50 has a seedling box holding frame 51 in which a plurality of seedling boxes C are accommodated. A fixed mounting table 64 for mounting the sensor and a vertically movable mounting table 66 that can be moved up and down by the link mechanism 65 and fixed at the upper moving position and the lower moving position are provided above the fixed mounting table 64. The movable mounting table 66 is provided with a vertical operation tool 67, and a seedling transplanter provided with a fixing release operating tool 73 for operating the fixing and releasing of the vertical movable mounting table 66 in the vicinity of the vertical operation tool 67. Is.

  Therefore, the vertical operation tool 67 of the vertically movable mounting table 66 fixed at the upward movement position is grasped, and the fixing operation is released by the nearby unlocking operation tool 73, and the vertically movable mounting table 66 is lowered. After being moved, it is fixed at the downward movement position by the fixing release operation tool 73. Then, the seedling box holding frame 51 that accommodates the plurality of seedling boxes C that have been nurtured is placed on the vertically movable mounting table 66. After that, the operator holds the up / down operation tool 67 again, releases the fixation with the nearby fixation release operation tool 73, moves the up / down movable mounting table 66 upward, and then moves up with the fixation release operation tool 73. Fix in the moving position. Next, the seedling box holding frame 51 containing a plurality of seedling boxes C grown on the fixed mounting base 64 below the vertically movable mounting base 66 on which the seedling box holding frame 51 is placed is placed.

  At this time, the vertically movable mounting table 66 is provided with a vertical operating tool 67, and the operator holds the vertical operating tool 67 and moves the vertically movable mounting table 66 up and down. Since the fixing release operating tool 73 for operating the fixing and unlocking of the vertically movable mounting table 66 is provided near the operating tool 67, the operator holds the gripped hand while holding the vertical operating tool 67 with one hand. Alternatively, the fixation release operation tool 73 can be operated with the other hand, and the vertical movement and fixing operation of the vertically movable mounting table 66 can be easily and efficiently performed. Therefore, the seedling replenishment work and the seedling supply work can be performed efficiently, the work time of the whole seedling transplanting work can be shortened, and the seedling transplanting work efficiency is improved.

  In addition, by using the seedling box holding frame 51 that can accommodate a plurality of seedling boxes C, the seedling box C can be supplied to the seedling transplanting machine in a plurality of units of the seedling box holding frame 51 at a time. The seedling supply operation can be easily and efficiently performed.

  According to the second aspect of the present invention, when the vertically movable mounting table 66 is fixed at the position where it is moved upward, the vertically movable mounting table 66 is in a state where the inner side is inclined low, and the vertically movable mounting table 66 is moved downward. The seedling transplanter according to claim 1, which is in a substantially horizontal state when fixed in position.

  Therefore, in addition to the operation of the first aspect of the invention, when the vertically movable mounting table 66 on which the seedling box holding frame 51 is mounted is fixed at the moved position, the vertically movable mounting table 66 has a low inside. Since the seedling box holding frame 51 is placed in an inclined state, the inside of the seedling box holding frame 51 is placed in a state where the inside is inclined low, so that the seedling box C is prevented from falling off and a transplanting operation can be performed appropriately and efficiently. In addition, when the vertically movable mounting table 66 is fixed at the lowered position, the vertically movable mounting table 66 is in a substantially horizontal state, so that the seedling box holding frame 51 is mounted on the vertically movable mounting table 66. Work is easy and workability is good.

  By configuring the seedling transplanting machine as described above, the seedling supply operation to the preliminary seedling mounting device 50 of the seedling transplanting machine can be easily and efficiently performed, and the working efficiency of the entire seedling transplanting operation is improved.

  An onion seedling transplanter as an embodiment of the present invention will be described below. First, onion seedlings are grown in a seedling box C as follows. As shown in FIG. 1, the seedling box C is formed with a large number of small pot-like cells 1 aligned vertically and horizontally. Three slits 1c are formed radially at the bottom 1a of each cell 1 from a circular hole 1b at the center, and round holes 1d, 1d ', and 1d "having different inner diameters are formed at the tips of the respective slits 1c. The inner diameters of the three round holes 1d, 1d ′, and 1d ″ are 1d = 1.8 mm, 1d ′ = 2.0 mm, and 1d ″ = 2.5 mm. The round hole 1d ″ having the inner diameter is formed in the rounded portion extending from the bottom 1a to the side 1e, and the other round holes 1d and 1d ′ are formed in the flat portion of the bottom 1a.

  The side portions 1e on the upper side from the bottom portion 1a are independent from each other, while the opening portions 1f of each cell 1 are connected to the opening portions 1f of adjacent cells, and the outer periphery of the entire seedling box is formed in a rectangular shape in plan view. ing. On the left and right edges along the longitudinal direction of the seedling box C, there are provided seedling box feeding square holes 2 for transferring the cells 1 one by one in accordance with the pitch in the longitudinal direction of the cells 1. In addition, the seedling box C is made of a synthetic resin such as polypropylene, and has flexibility. For this reason, when the seedling box C is transferred, it can be bent and transferred. Then, as shown in FIG. 2, each cell 1 of the seedling box C as described above is filled with floor soil 3 and seed 4 is seeded on it, and then seeded on it, so that it is laid in a nursery house or the like. Place the seedlings on the nursery field 5 to raise them. By appropriately raising seedlings, in each cell 1 buds emerge from the seed 4 and the foliage portion 6 extends upward, while the root 7 extends downward along the floor soil 3 in the cell 1 along the inner wall of the side portion 1e. It extends in a spiral shape, and further extends into the soil of the seedling raising field 5 through the round hole 1d "having the largest inner diameter in the rounded portion extending from the bottom 1a to the side 1e. The process of extending the root 7 Then, the root 7 is spirally extended along the inner wall of the side portion 1e and guided to the inner wall, and guided to the round hole 1d ″ having the largest inner diameter in the rounded portion extending from the bottom portion 1a to the side portion 1e. It grows well outside the cell 1 and extends into the soil of the nursery field 5, so that the seedlings grow well, and all the seedlings in each cell 1 grow into excellent seedlings without causing developmental defects. Thus, seedlings suitable for machine transplantation can be obtained.

  Further, since the inner diameters of the three round holes 1d, 1d ′, and 1d ″ are large, medium, and small, as described above, the root 7 is spirally formed along the inner wall of the side portion 1e as described above. In the state of being guided by the inner wall, it is guided to the round hole 1d ″ having the largest inner diameter in the rounded portion extending from the bottom 1a to the side 1e, and extends well to the outside of the cell 1, and the soil of the seedling farm 5 As it grows inward, a small number of roots also extend into the soil of the nursery field 5 from the two small holes 1d and 1d ', and promote growth. In this way, the roots properly extend from the large, medium, and small round holes 1d, 1d ', and 1d "of the cell 1 into the soil of the nursery field 5 (a little from the central round hole 1b). Seedlings will grow well by absorbing the nutrients in the soil of the nursery field 5, and all seedlings of each cell 1 will grow into excellent seedlings without causing developmental defects and obtain seedlings suitable for machine transplantation. In addition, since there is one round hole 1d ″ having a large inner diameter that the thick root extends into the soil of the seedling farm 5, the seedling box C can be easily peeled off from the seedling farm 5 after growth, and workability is improved. good.

Here, the configuration of the seeder A will be described with reference to FIG.
The transfer conveyors B1, B2, B3, and B4 that transfer the seedling box C are driven and rotated by electric motors M1, M2, M3, and M4, respectively. The fertilizer application device D is composed of a fertilizer hopper D1 and a fertilizer feeding part D2, and the fertilizer feeding part D2 includes a roll-shaped fertilization roll provided with a number of concave portions engaging with the granular fertilizer in the fertilizer hopper D1 in the rotation direction, An electric motor that drives and rotates the fertilizer roll is provided, and the fertilizer roll is driven and rotated so that the granular fertilizer falls by the set number of grains to each cell 1 of the seedling box C that is transferred below.

  The floor material supply device E includes a floor soil hopper E1 and a belt-type floor soil feeding portion E2. The floor soil feeding unit E2 is provided with a belt E6 hung on a roller E4 and a driven roller E5 that are rotationally driven by an electric motor E3, and by the rotation of the belt E6, the floor soil in the upper floor soil hopper E1 is fed out quantitatively. The bed soil is supplied into the seedling box C which is transferred so as to pass under the apparatus E.

  The pressure-reducing and leveling device F is attached so as to press the seedling box C to which the pressure-reducing rollers F1 and F1 are transferred from above, and the leveling brush F2 is transmitted from the motor M1 to the lower side thereof and is driven to rotate. It is provided as follows. Thereby, the floor soil stuffed in the seedling box C by the floor material supply device E is suppressed and leveled to a predetermined height.

  The drug administration device G includes a drug hopper G1 and a drug delivery part G2, and the drug delivery part G2 has a roll-shaped drug roll provided with a number of recesses in the rotation direction for engaging the drug in the drug hopper G1, and the drug An electric motor for driving and rotating the roll is provided, and the drug roll is driven and rotated so that the drug falls by a set amount with respect to each cell 1 of the seedling box C to be transferred below.

  The onion seeding device H is a well-known vacuum adsorption type seeding device in which seeding is performed by repeatedly sucking and releasing the onion seeds 4 coated in each cell 1 in a row in the horizontal direction one by one.

  The soil covering apparatus I includes a soil covering hopper I1 and a belt type soil covering feeding part I2. The covering soil feeding section I2 is provided with a belt I6 hung on a roller I4 and a driven roller I5 that are rotationally driven by a motor I3, and by the rotation of the belt I6, the covering soil in the upper covering hopper I1 is fed out quantitatively. The soil is covered in each cell 1 of the seedling box C transferred so as to pass under the apparatus I.

  The irrigation apparatus J is provided so that water is sent to the irrigation pipe J2 by the pump J1 and sprayed downward in the form of mist from a plurality of sprinkling holes opened below the pipe, and each cell 1 of the seedling box C is provided. Evenly irrigate the soil inside.

  That is, the seedling box C placed on the first transfer direction end side of the seeding machine A is conveyed by transfer conveyors B1, B2, B3, B4 driven and rotated by electric motors M1, M2, M3, M4. Then, the granular fertilizer is put into each cell 1 by the fertilizer application device D, then the floor soil is supplied by the floor material supply device E, and then the floor soil is suppressed by the pressure reduction and leveling device F to a predetermined height. To be leveled. And after a chemical | medical agent is put in each cell 1 with the prescription apparatus G, it seed | inoculates with the onion seeding apparatus H, and the covering soil is supplied in each cell 1 with the soil covering apparatus I. Finally, irrigation is performed by the irrigation device J, and the seeding operation is completed.

  Therefore, as shown in FIG. 6, since fertilizer, floor soil, drug, seed, and covering soil are supplied in the cell 1 in this order, when the water is irrigated from above, there is a drug below the seed, so that the seed melts. It is prevented from directly covering the released chemicals, resulting in prevention of phytotoxicity, good germination and seedling growth, and good quality seedlings can be obtained (fertilizer, floor soil, seeds, drugs, If the soil is supplied in the order of covering, there is a drug on the seeds at the time of irrigation, so the seeds may be covered with the dissolved drug, and there is a risk of causing chemical damage).

  Also, using two flooring supply devices, fertilizer application device D, first flooring material supply device E ′, medicine application device G, second flooring material supply device E ″, onion seeding device H, soil covering device I, irrigation device J 7, as shown in FIG. 7, since fertilizer, floor soil, chemicals, floor soil, seeds, and covering soil are supplied in this order in the cell 1, seeds melted out when irrigated from above. There is no direct drug exposure, further prevention of phytotoxicity, good germination and seedling growth, and good quality seedlings can be obtained.

  In addition, although the said Example demonstrated the seeding machine of the onion, it is needless to say that it may apply to the seeding machine for paddy rice. That is, instead of the onion seeding device H, a general rice seeding device may be provided.

  The seedlings thus grown are supplied to the seedling transplanter 8 described below together with the seedling box C and transplanted to the field. In the following, the symbol for the seedling is denoted as N, the symbol for the floor, which is the floor soil part where the root of the seedling extends, is denoted as Na, and the symbol for the foliage part of the seedling is denoted as Nb.

  As shown in FIG. 8, the seedling transplanter 8 is configured such that the transplanting device 9 is mounted on the traveling vehicle body 10, so that the transplanting device 9 transplants the seedling N into the field while self-propelled by the traveling vehicle body 10. It has become. The traveling vehicle body 10 is a so-called agricultural tractor, and includes a pair of left and right front wheels 11 and 11 and a pair of left and right rear wheels 12 and 12, a seat 13 on which a driver sits, A steering handle 14 is provided that is disposed in the front and that turns the pair of left and right front wheels 11 and 11 left and right so that the driver can change the traveling direction of the traveling vehicle body 10. In addition, a three-point link mechanism 16 that moves up and down by a lift arm 15 that pivots up and down by hydraulic drive is provided at the rear of the vehicle body, and the transplanter 9 is mounted so as to be movable up and down by the three-point link mechanism 16.

  In addition, the transplanting device 9 contains a seedling box C that contains the seedling box C and transports it toward the seedling extraction means PU, and the seedlings N sequentially from each cell 1 of the seedling box C that the seedling box supply means 17 supplies. The seedling extracting means PU for extracting the seedlings and the seedling planting means PT for planting the seedlings N extracted by the seedling extracting means PU one by one in the field are provided. Therefore, if the seedling box C having the seedlings N grown in each cell 1 as described above is loaded into the seedling box supply means 17, the seedlings N in each cell 1 of the seedling box C are automatically and sequentially seeded by the seedling extraction means PU. N is taken out, and the taken out seedling N is planted one by one in the field by the seedling planting means PT. Specifically, each means of the transplantation device 9 is configured as follows.

  Specifically, the seedling box supply means 17 is arranged in the vicinity of the rear side of the seat 13 of the traveling vehicle body 10 in a side view of the body, and is loaded with a seedling box that is a place where an operator who has boarded the traveling vehicle body 10 loads the seedling box C. Part 17a and seedling box C loaded in seedling box loading part 17a are conveyed downwardly, and then bent and conveyed, and further downward toward seedling extraction position p1 by seedling extraction means PU A seedling box supply / conveyance section 17b that transports the seedling box, and a seedling box C that has been transported by the seedling box supply / conveyance section 17b and removed from the seedling by the seedling extraction means PU is bent and conveyed in a U-shape. An empty box transport section 17c that transports upward toward the lower position of the loading section 17a is provided. The seedling box C to be loaded in the seedling box loading section 17a is loaded in such a posture that the longitudinal direction of the seedling box C is directed in the front-rear direction and the upper surface side (the opening 1d side of the cell 1) is directed upward. The Therefore, the loaded seedling box C is transported in the longitudinal direction of the seedling box C, and the seedlings N accommodated in each cell 1 of the loaded seedling box C are leaves in the seedling box loading section 17a. The stem Nb extends upward, and at the seedling extraction position p1, the leaf stem Nb extends rearward and is transported so that the floor Na is positioned forward relative to the leaf Nb. The Further, the seedling box supply means 17 is provided with an empty box storage portion 17d that receives and stores an empty seedling box C that is transported by the empty box transporting portion 17c and discharged from its transport end. What is indicated by reference numeral 18 in the figure is a support frame for supporting the seedling box supply means 17, and the support frame 18 is a member whose base is fixed to a connection frame 19 connected to the three-point link mechanism 16. The upper part extends upward between the seedling box supply transport unit 17b and the empty box transport unit 17c to support the upper side of the seedling box supply means 17.

  The seedling extraction means PU is configured to extrude and extract seedlings from the bottom 1a side of the cell 1. Specifically, the pin 20 for extruding the seedling provided in a rod shape is arranged in the U-shaped transporting portion on the lower side of the seedling box supply means 17 so that the tip portion of the pin 20 faces rearward, The tip of the pin 20 is provided so as to reciprocate at an appropriate timing so that it protrudes rearward and retracts forward. Thereby, the seedling pushing pin 20 enters the bottom hole 1b provided in the bottom 1a from the bottom 1a side of the cell 1 of the seedling box C supplied up to the seedling picking position p1, and the floor Na in the cell 1 is inserted. The seedlings N are pushed backward to take out the seedlings N from the cell 1 backward.

  In addition, the seedling extraction means PU is configured to simultaneously extract a plurality of seedlings N from the cell 1 in a row. That is, a plurality of the above-mentioned seedling pushing pins 20 are provided side by side corresponding to each of the cells 1 in the left and right horizontal rows (short direction of the seedling box C) of the seedling box C supplied to the seedling picking position p1. Thus, the seedlings in the horizontal row at the seedling extraction position p1 are provided so as to be pushed out at the same time. The plurality of seedlings N ... taken out by the seedling picking means PU are sequentially supplied to the seedling planting means PT one by one by the seedling supplying means NT.

  The seedling planting means PT applies the seedling N to the rod-shaped seedling planting body p (specifically, imparts a moving action directly to the floor Na of the seedling N) and moves and plants it in the soil of the transplanting field PG in the field. It is comprised as follows. The specific drive configuration of the seedling planting means PT is as follows. First, a PTO shaft protruding from the rear part of the traveling vehicle body 10 is input into a transmission case provided in the connection frame 19 of the transplanting device 9 via a transmission shaft provided with a universal joint, and a transmission mechanism in the transmission case is set. A plurality of sub-transmission cases are provided so as to be transmitted to the transmission shaft 21 that is long in the left-right direction of the machine body in the transmission case 20 disposed near the lower part of the lower part of the seedling box supply means 17 through the transmission case 20. The power is transmitted from the transmission shaft 21 to the planting drive shaft 23 protruding toward the side of the rear portion of the sub-transmission case 22 via the transmission mechanism in the motor 22. A disk-shaped rotating case 24 that is rotated by the planting drive shaft 23 is attached to the planting drive shaft 23, and is located on the side of the rotary case 24 near the outer periphery of the rotation and separated from each other by 180 degrees with respect to the rotation center. The said seedling planting body p * p formed in the rod shape is attached to each of the seedling planting body rotating shafts 25, 25 projected sideways from the location so as to rotate integrally. The seedling plant rotation shafts 25 and 25 are rotated via a transmission mechanism using a cam or gear in the rotation case 24 that operates as the rotation case 24 is rotated by the planting drive shaft 23. The tip of the seedling planting body p · p is provided so as to draw a set locus p2.

  The seedling planting body p · p is in a posture toward the radial direction from the rotation center of the rotating case 24 while the seedling planting body p directly moves the seedling and moves the seedling into the soil of the transplanting field PG. In the state where the tip of the seedling planting body p enters the soil of the transplanting field PG, the seedling planting body p is in a substantially upright posture, the rod-shaped seedling planting body p is attached to the rod-shaped seedling N, and the seedling N The seedling N that has been moved in a posture in which the floor portion Na of the seedling is on the tip side of the seedling planting body p and the leaf stem Nb is on the base side of the seedling planting body p is planted in an upright posture on the transplanting field PG. . Then, when the tip of the seedling planted body p passes through the lowermost position of the locus p2, the seedling planted body p keeps the seedling planted body p as substantially as possible with respect to the soil surface even if the rotating case 24 rotates. The planting body p is rotated with respect to the rotating case 24. Thereby, immediately after planting, the seedling planting body p does not kick the seedling N planted in the soil backward. Rotating case so that the tip of the seedling planting body p rises above the soil surface and returns to a posture in the radial direction from the rotational center of the rotating case 24 when the seedling N is planted to some extent forward from the seedling N planted by the advance of the aircraft. The seedling planting body p is rotated with respect to the rotating case 24 with the rotation of 24. It should be noted that the seedlings taken out by the seedling taking-out means PU in a posture in which the floor portion Na of the seedling N lies in the front side and the leaf stem Nb lies horizontally in the front-rear direction at the front side of the seedling planting means PT. N is supplied. The seedling planting body p is rotated downward from above with respect to the seedling N supplied in this way, and the seedling planting body p directly acts on the floor portion Na of the seedling N, so that the soil of the transplanting field PG Move in.

  In addition, when the seedling planting body p · p of the seedling planting means PT has moved the seedling N in a posture lying in the front-back horizontal direction as described above along an arcuate trajectory to reach the soil of the transplanting field PG. The seedling N is moved so as to be in an upright posture. Thus, in order for the seedling planting body p · p to move the seedling N along the trajectory that draws an arc, the seedling that is located on the left and right of the trajectory p2 of the seedling planting body p · p and extends downward along the trajectory p2 A guide body 26 is provided. This seedling guide body 26 has left and right guide plates 26a and 26a arranged with a gap that is wider than the left and right width of the seedling planting body p and p and slightly narrower than the left and right width of the floor portion Na of the seedling N, and , Extending downward along the trajectory p2 from the position where the seedling N is supplied in a posture lying horizontally in the front-rear direction to the upper vicinity of the soil surface of the transplanting field PG, and between the left and right guide plates 26a, 26a It is provided so that p passes. The left and right guide plates 26a and 26a are provided so as to be expandable, and an urging body 26b such as a spring for urging the left and right guide plates 26a and 26a in the direction of narrowing is provided. Accordingly, when the seedling planting body p moves the seedling N to the transplanting field PG so as to boost the floor portion Na of the seedling N, the left and right seedling guide plates 26a and 26a are biased by the biasing body 26b. Thus, the floor portion Na of the seedling N acts so as to be sandwiched elastically. Therefore, the seedling N is not knocked down by the seedling planting body p, and the seedling N is changed while the posture of the left and right seedling guide plates 26a, 26a is changed from the front / rear horizontal posture to the posture standing up and down. It will move to draw an arc with the planting body p.

  And according to this invention, this seedling transplanter 8 is equipped with the following pressure suppression apparatuses 27. In other words, the pressure-reducing action part 29a of the pressure-reducing device 27 is configured to move up and down so that it is pressed a plurality of times against the soil of one pressure-relief target site. As a result, it is possible to perform sufficient pressure suppression, and it is difficult to cause a pressure suppression failure due to soil or the like, and it is possible to reduce the size of the airframe without increasing the pressure suppression action portion.

  Further, by providing the pressure reducing action part 29a of the pressure reducing apparatus 27 in a plate shape, the size of the airframe can be further reduced, and the pressure reducing action part 29a of the pressure reducing apparatus 27 presses against the soil of one pressure reduction target part. By providing the number of times so as to be adjustable, the number of times can be appropriately adjusted according to the soil quality and the like so as to obtain an appropriate pressure-reducing state.

  Furthermore, it is set as the structure which the pressure suppression action part 29a of the pressure suppression apparatus 27 moves up and down, grounding to a farm scene. As a result, the vertical movement width of the pressure suppression device 29a of the pressure suppression device 27 can be set small, and the size of the airframe can be further reduced, and the vertical vibration frequency of the pressure suppression device 29a can be easily increased to reduce the pressure. Therefore, it is possible to easily improve the field applicability.

  Then, the pressure-reducing action part 29a of the pressure-reducing apparatus 27 is provided so as to be movable up and down so as to maintain a grounded state, and the vibration driving part of the vibration device that moves the pressure-reducing action part up and down on the pressure-reducing action part or a member that moves up and down together with the pressure-reducing action part. Shall be installed. As a result, even if the support height of the pressure-reducing action portion 29a fluctuates up and down due to unevenness of the farm scene, the pressure-reducing action portion 29a can move up and down so as to maintain the ground contact state with the farm scene, and as such Even if the pressure-reducing action part 29a moves up and down, the vibration drive part of the vibration device is attached to the pressure-reducing action part or a member that moves up and down with it, so that the vertical amplitude of the pressure-reducing action part 29a does not change and the pressure-reducing action is It can be continued evenly, and thus better suppression can be achieved.

  Moreover, since the suppression action part 29a of the suppression device 27 is located in the vicinity of the left and right sides of the seedling planting position p3 and is in contact with the field scene, the following effects are obtained. That is, the seedling planting body p and the seedling flooring 2 part are in close contact with each other while the seedling moves into the soil of the transplanting field PG. At this time, the flooring 2 part is wet or the flooring 2 If the part is pre-hardened with a binder to prevent its collapse, the seedling flooring 2 part may stick to the seedling planting body p. Then, the seedling planting body p, when the tip part enters the soil of the transplanting field PG and planting the seedling in an upright posture on the soil of the transplanting field PG, and then comes out upward from the soil of the transplanting field PG, The seedlings also rise together, and the seedlings planted in the soil are lifted and cannot be planted in an appropriate posture. However, as described above, the pressure reducing action part 29a is positioned in the vicinity of the left and right sides of the seedling planting position p3, and is configured to move up and down while touching the field scene, so that the seedling planting body p is raised from the seedling planting position p3. When trying to do so, the planted seedlings are prevented from rising together with the seedling planting body p by the soil pressed from above by the left and right pressure-reducing action parts 29a and 29a, and the above problems are solved. Is done.

  A specific configuration of the pressure reducing device 27 is as shown in FIGS. That is, first, a pressure-reducing plate 29 that is curved downward and is divided into left and right sides and formed into a bifurcated shape is integrally formed on one side portion of a horizontal shaft 28 that is rotatably provided at the lower front side of the auxiliary transmission case 22. To install. The rear side of the pressure-suppressing plate 29 is plate-shaped pressure-reducing action portions 29a and 29a that are grounded in the vicinity of the left and right sides of the seedling planting position p3 and before and after the seedling planting position p3. Further, the operating arm 30 is integrally attached to the other side portion of the horizontal shaft 28, and the operating arm 30 and the pressure reducing plate 29 are provided so as to rotate integrally around the horizontal shaft 28. Further, the operating arm 30 is provided with a biasing body 31 such as a spring that biases the pressure reducing action portions 29a and 29a so as to rotate upward away from the soil surface. The operating arm 30 is urged by the urging body 31 on the rotating outer peripheral surface of the vibration driving unit 32 attached so as to rotate integrally with the transmission shaft 21 protruding from the side portion of the transmission case 20. It is provided to hit. The vibration drive unit 32 has a plurality of bearings 32a (eight in this example) attached to the outer periphery of the disk-like member at equal intervals, and the transmission shaft 21 is driven and rotated to drive the seedling planting means PT. Each time the vibration drive unit 32 rotates and contacts one bearing 32a, the operating arm 30 swings, the pressure suppression plate 29 swings, and the pressure suppression operation portions 29a and 29a move up and down. Then, the vertical movement of the pressure-reducing action portions 29a and 29a is specifically performed a plurality of times during one planting cycle in which the rotating case 24 performs a half rotation (half rotation) and one seedling planting body p performs a seedling planting operation. In this example, it is provided to move up and down four times. As a result, while the aircraft is moving forward, the front side portion of the soil pressed by the downward movement of the pressure reducing action portion 29a is pressed again when the next pressure reducing action portion 29a is moved downward. The pressure-reducing action part 29a moves up and down so as to press a plurality of times against the soil of one pressure-reduction target part. The vibration drive unit 32 is the transmission shaft 21 and rotates in conjunction with the transmission shaft on the lower transmission side of the planted inter-plant transmission unit (not shown). Even if is changed, the number of vertical movements set by the pressure reducing action part 29a in one planting cycle of the seedling planting body p does not change. Therefore, the drive structure of the pressure-reducing action part 29a is facilitated as a structure in which the pressure-reducing action part 29a is operated using the power extracted from the drive system of the seedling planting body p, and the pressure-relieved state changes even if the seedling planting strain is changed. Good suppression can be achieved. Although not shown in the drawings, as a configuration in which the transmission shaft 21 is transmitted to the rotation shaft of the vibration drive unit 32 via a transmission unit that can perform a speed change operation, the pressure suppression operation unit 29a of the pressure suppression device 27 is provided as a single pressure suppression target location. The number of times of pressing against the soil can be adjusted. Furthermore, the height of the transplanting device 9 is set or controlled as appropriate to the transplanting field scene so that the pressure-reducing action part 29a is always in contact with the field scene. It is assumed that the pressure is reduced by vibrating up and down while touching the field.

  Moreover, it can replace with said structure, and can become what is shown in FIG. 11 or FIG. That is, as shown in FIG. 11, instead of the vibration drive body 32 in the above example, the pressure reducing action portion 29a can be moved up and down by an electric vibration drive body 32A. Further, a biasing body 31a such as a spring attached to the operating arm 30 is attached so as to bias the pressure-reducing action part 29a in a downward direction, and the support height of the pressure-reducing action part 29a is increased or decreased due to unevenness of the farm scene. Even if it fluctuates, the pressure reducing action part 29a can move up and down so as to maintain the ground contact state. Further, the vibration drive unit 32a is attached to the pressure-reducing action part or a member that moves up and down together with the pressure-reducing action part. In this example, it is attached to the operating arm 30. Thereby, even if the suppression action part 29a moves up and down so as to maintain the ground contact state with the farm scene, the vertical amplitude of the suppression action part 29a does not change, and the suppression action can be continued evenly. It should be noted that a restricting body that restricts the pressure-reducing action portion 29a from moving below the set lower limit position is provided, and the pressure-relieving action portion 29a droops greatly downward when the transplanting device 9 is raised during non-working, so that the airframe moves. Don't get in the way.

  In the example shown in FIG. 12, the difference from the example shown in FIG. 11 is that, instead of the pressure-reducing plate 29, the seedling planting position p3 is sandwiched between the left and right sides on the horizontal axis 28 so as to be horizontal to the rear of the seedling planting position p3. Two extending support frames 29A and 29A are integrally attached, and pressure-reducing wheels 29Aa and 29Aa, which are pressure-reducing action portions each constituted by a rotatable ring body, are attached to the rear ends of the support frames 29A and 29A. . Thereby, when working in the transplanting field PG covered with the multi-film, even if the pressure-reducing wheels 29Aa and 29Aa are always in contact with the ground, the pressure-reducing wheels 29Aa and 29Aa roll and may tear the multi-film. Therefore, the pressure in the transplanting field PG covered with the multifilm can be reduced well.

  Further, the vibration of the electric vibration driver 32A provided as in the example shown in FIG. 11 can be easily controlled by the control device CTL. Specifically, the vibration driver 32A detects that the operation tool L1 for switching on and off the transmission to the seedling planting means PT is switched to the transmission to the seedling planting means PT (so as to be in a transmission state). It is configured to switch from the vibration stop state to the vibration state. Thereby, it is possible to automatically stop the vibration of the vibration driving body 32A that is not required during non-working, to suppress an increase in machine vibration during non-working, and to prevent shortening of the machine life. Further, for example, a dial-type frequency setting operation tool L2 can be provided to arbitrarily set the frequency of the vibration driving body 32A per planting cycle of the seedling planting body p, which can be finely adjusted so as to obtain an optimal pressure suppression state. It becomes. Further, the frequency of the vibration driver 32A is changed in proportion to the number of rotations of the seedling planting body p so that the frequency of the vibration driving body 32A per planting cycle of the seedling planting body p becomes the set frequency. The configuration is to be controlled. As a specific example, a rotation sensor S1 for detecting the number of rotations of the transmission shaft 21 that drives the seedling planting body p is provided as shown in the figure, and the detected value of the rotation sensor S1 is input to the control device CTL to vibrate. The frequency of the driving body 32A is appropriately controlled. Therefore, even if the work speed is changed or between the seedling planting stocks, the number of up and down movements of the pressure suppressing action portions 29Aa and 29Aa in one planting cycle of the seedling planting body p does not change, and uniform suppression can be continued.

  By the way, this transplanter 8 includes a soil loosening body 33 that sinks into the soil in front of the locus p2 of the front side of the locus p2 of the tip of the seedling planting body p and loosens the soil. This soil loosening body 33 is composed of a plate-like member that is slightly wider than the left and right widths of the tip side portion of the rod-shaped seedling planting body p. When the soil unraveling body 33 advances into the soil in front of the seedling planting position p3, The soil loosened behind the soil loosening body 33 immediately spreads around, and the seedling planting body p rushes into the soil g spilled behind the soil loosening body 33 loosened by the soil loosening body 33. It has come to go.

  Therefore, as shown in FIG. 13, the transplanter 8 includes a seedling planting means PT configured to apply the seedling N to the rod-shaped seedling planting body p so as to move and plant the soil in the transplant field PG of the field, A soil unraveling body 33 that sinks into the soil in front of the locus of the seedling planting body p when moving the seedling and loosens the soil is provided, and the seedling planting body is placed in the soil g loosened by the soil unraveling body 33. It is configured so that p enters and seedlings N are planted. Therefore, the stick-shaped seedling planting body p moves the seedling planting body p to the transplanting field PG in the field by applying the seedling N to the seedling planting body p, and the soil loosening body 33 is the soil in front of the locus of the seedling planting body p when the seedling is moved. Dive into and loosen the soil. Then, the seedling planting body p enters the soil g loosened by the soil loosening body 33 to plant the seedling N. Therefore, the seedling N that is moved by being applied to the seedling planting body p enters the soil g loosened by the soil loosening body 33, and the seedling N is moderately applied to the rod-shaped seedling planting body p by the resistance received at this time. Therefore, the seedling N is less likely to be repelled by the rod-shaped seedling planting body p and separated from the seedling planting body p, and is planted in an appropriate posture. In addition, when the seedling N is moved into the soil by the rod-shaped seedling planting body p and is in an upright posture, the seedling planting body p moves out of the soil away from the seedling N. Since the traces from the inside are small and are buried immediately, it is unlikely that the planted seedling N will greatly disturb the posture. As described above, the seedling planting means PT has a simple configuration in which the seedling N is moved and planted to the transplanting field PG by the rod-shaped seedling planting body p, and can be easily planted at high speed. It becomes the structure which p enters into the soil g loosened by the soil loosening body 33 to plant the seedling N, and the planting posture is less likely to be disturbed, so that the seedling can be transplanted at a high speed and in an appropriate posture. A seedling transplanter is obtained.

  In addition, while the seedling planting body p moves the seedling N to the ground, a seedling guide body 26 is provided that contacts the seedling N to provide resistance to the movement of the seedling N and guides the movement of the seedling N. Yes. Accordingly, the seedling N passes through the seedling guide body 26 while moving the seedling N to the ground, and the seedling N moves while being appropriately pressed against the rod-shaped seedling planting body p due to resistance. Therefore, even if it is at the time of the movement at this time, it is difficult for the seedling N to be repelled by the rod-shaped seedling planting body p and to be separated, and the seedling can be transplanted in a more appropriate posture.

  The soil loosening body 33 is attached so that the front-rear position can be adjusted. Thereby, when the soil unwrapping behind the soil loosening body 33 is not satisfactorily performed due to the soil quality, the soil loosening body 33 is appropriately adjusted in the front-rear direction, and the seedling planting body p is loosened by the soil loosening body 33. It can be adjusted so that the seedlings can be planted in a good posture by properly entering the soil. Although a specific mounting configuration can be appropriately configured, in this example, a mounting shaft 33a extending forward is fixed to the upper portion of the earth loosening body 33, and the mounting shaft 33a is fixed to a mounting cylinder 33b fixed to the lower portion of the transmission case 20. Insert and align one of the holes provided in the side of the mounting cylinder 33b and the plurality of holes 33c in the front-rear direction on the side of the mounting shaft 33a, and attach the bolt 33d so as to penetrate both holes. It is supposed to be fixed. And if the position of the attachment shaft 33a is shifted back and forth and the bolt 33d is passed through another hole 33c, the soil loosening body 33 is attached with the front and rear positions changed.

  Since the soil loosening body 33 has a nata-like shape that curves in the vicinity of the outer side of the locus of the front lower half of the locus p2 of the tip of the seedling planting body p in a side view, the soil loosening body 33 The resistance when the body 33 is submerged in the soil and when the soil loosening body 33 is advanced in the soil is made as small as possible.

  Specifically, the seedling supply means NT includes drive rollers 34 and 34 that are driven to rotate at both left and right ends, driven rollers 35 and 35 that are rotatably provided at the left and right center sides, and both rollers 34, 34, 35. -It is set as the structure provided with the seedling supply belts 36 and 36 wound around 35. Thereby, a plurality of seedlings N, which are taken out by the seedling picking means PU and arranged in a line in the left and right lateral row, are placed on the left and right conveying belts 36 and 36, and The left half of the horizontal seedlings N... Is conveyed to the left by the drive rotation of the left conveyor belt 36, the right half is conveyed to the right by the drive rotation of the right conveyor belt 36, and left and right drive rollers 34, 34. The floor portions Na of the seedlings N are supplied one by one to the upper end portions (seedling supply units 26c and 26c) of the left and right guide plates 26a and 26a of the seedling guide bodies 26 provided on the left and right outer sides of the seedlings. In this way, the seedling planting bodies p and p of the left and right seedling planting means PT and PT respectively provided with the seedlings N supplied one by one corresponding to the left and right seedling supply units 26c and 26c have been supplied. It moves from above toward the seedlings N and N, and moves the floor Na of the seedling N into the soil of the transplanting field PG while passing between the left and right guide plates 26a and 26a to plant the seedlings. . In addition, protrusions 36a are provided at set intervals in the belt rotation direction on the front end side of the outer peripheral surface of the seedling supply belt 36, and one floor portion Na of the seedling N is provided on the belt upper surface between the right and left of the protrusion 36a. Thus, the seedlings placed on the upper surface of the seedling supply belt 36 can be accurately supplied to the seedling supply unit 26c one by one.

  There is a configuration in which the seedling N extracted by the seedling extraction means PU is provided directly on the seedling supply belts 36 and 36 of the seedling supply means NT. In this embodiment, the seedling supply means NT is the seedling box supply means 17. The seedling supply means NT2 is provided in the seedling supply means NT arranged in such a manner, and the seedling supply means NT2 for transferring the seedling N taken out by the seedling extraction means PU is provided in the seedling supply means NT arranged in such a manner. The length of the transplantation device 9 is shortened without projecting rearward.

  The seedling transfer means NT2 includes a seedling holder 37 provided with seedling engaging portions 37a that engage with the floor portions Na of the horizontal row of seedlings N that are pushed by the seedling pushing pins p of the seedling extracting means PU. The seedling removal position p1 and the seedling delivery position p4 in the vicinity of the upper front side of the seedling supply belts 36 and 36 are reciprocally moved by a link 38 that drives and rotates the seedling holder 37. Thus, when the seedling pushing pins p are pushed out and the seedlings N in the horizontal row are pushed out from the respective cells 1..., The seedling engaging portions 37a of the seedling holder 37 located at the seedling extraction position p1. The floor portion Na of the seedling N is engaged and held. Then, the seedling holder 37 rotates downward by the rotation of the link 38 and moves to the seedling delivery position p4. At this time, the tips of the second seedling push-out pins 39... Fixed in a posture in which the axis is oriented horizontally rearward in each seedling engaging portion 37 a enter into the seedling engaging portions 37 a. The N floor Na is extruded backward and dropped onto the seedling supply belts 36 and 36. When the floor portion Na of the seedling N engaged in the respective seedling engaging portions 37a is pushed backward by the second seedling pushing pins 39, the seedling pressing member 40 provided in a comb shape is lowered. Then, the floor portions Na of the seedlings N from which the members 40 are extruded are pushed down so that the seedlings are quickly and accurately placed on the seedling supply belts 36 and 36.

  The part which attached | subjected the code | symbol 41 in FIG. 8 is the leveling roller which leveles the topsoil surface of the transplanting field PG ahead of each seedling planting position p3 by each seedling planting means PT. In addition, the transplanting device 9 includes, in one seedling box supply means 17, a seedling extraction means PU for extracting seedlings N ... one by one from the seedling box C loaded in the seedling box supply means 17, and the seedling extraction means PU. The seedlings N2 delivered by the seedling supply means NT and the horizontal seedlings N2 delivered by the seedling delivery means NT2 are supplied to the seedling planting means PT / PT provided on the left and right. Two seedlings C are planted from one seedling box C with a seedling supply means NT that performs and a right and left seedling planting means PT / PT for planting the seedling N supplied by the seedling supply means NT in the transplanting field PG. It is configured, and by providing two transplant units configured in this way on the left and right, it can be configured as a four-row planting, and by providing n bodies, it can be configured as a 2 × n-row planting. .

Here, the preliminary seedling placement device 50 will be described in detail.
On the left and right sides of the front portion of the traveling vehicle body 10, left and right preliminary seedling placement devices 50 and 50 capable of placing eight seedling tray holding frames 51 respectively rotate and rotate on left and right support frames 52 and 52 provided at the front portion of the traveling vehicle body 10, respectively. It can be fixed freely.

  First, a description will be given of a configuration in which the preliminary seedling placement device 50 can be rotated and fixed. A support frame 52 in which the lower portion of the central mast 54 provided at the central portion of the main frame 53 of the preliminary seedling placement device 50 is provided at the front portion of the traveling vehicle body 10. The support plate 56 which is inserted into the through-hole 55 and welded and fixed to the lower portion of the central mast 54 is in contact with the upper surface of the support frame 52, and a retaining split pin 57 is attached to the lower end portion which protrudes through. Yes.

A cylindrical locking member 58 is fixed on the upper surface of the support frame 52, and four engaging grooves 59 are provided in the locking member 58 at intervals of 90 degrees.
The center mast 54 is provided with two rotation fixing release levers 60 and 60 facing each other so as to be swingable up and down by pins 61 and 61. The two rotation fixing release levers 60, 60 are provided with projections 62, 62 that engage with the engagement grooves 59, respectively, and the projections 62, 62 are respectively biased by biasing springs 63, 63. Is biased downward to engage with the engaging grooves 59. Further, the tip portions of the rotation fixing release levers 60 and 60 are engaged by two cams. When one rotation fixing release lever 60 is operated in the fixing release direction (upward), the other rotation fixing release lever 60 is also configured to be interlocked so as to be operated in the unlocking direction (upward).

  Therefore, when the operator operates one of the rotation fixing release levers 60 in the fixing release direction (upward), the other rotation fixing release lever 60 is also operated in the fixing release direction (upward), and two rotations are performed. The protrusions 62 and 62 of the fixing release levers 60 and 60 are disengaged from the engaging grooves 59 and 59, so that the preliminary seedling placement device 50 is rotatable around the central mast 54. Therefore, the operator rotates the preliminary seedling placement device 50 and again engages the projections 62 and 62 of the two rotation fixing release levers 60 and 60 with the engagement grooves 59 and 59 at an arbitrary position, so that the preliminary seedling placement is performed. The rotation of the device 50 can be fixed.

Next, the structure of the part which mounts the seedling tray holding frame 51 of the preliminary seedling mounting device 50 will be described in detail.
Four fixed mounting tables 64 are provided below the main frame 53 of the preliminary seedling mounting device 50 so that the seedling tray holding frame 51 can be mounted in a state where the central mast 54 side is inclined low. Then, four vertically movable mounting bases 66 are provided above the fixed mounting bases 64 so as to be vertically movable by link mechanisms 65.

  Further, an up / down operation bar 67 as an up / down operation tool is fixed to each up / down movable mounting table 66. An operator moves the up / down movable mounting table 66 up and down by holding the up / down operation bar 67. It is the composition which makes it.

  Further, between the respective vertically movable mounting bases 66 and the main frame 53, left and right fixing pins 68 provided on the respective vertically movable mounting bases 66 are configured to be engaged with each other. ing. That is, to the main frame 53, an upper fixing member 69 fixed at a position where the vertically movable mounting table 66 is moved upward and a lower fixing member 70 fixed at a position where the vertically movable mounting table 66 is moved downward are fixed. Each of the upper and lower fixing members 69 and 70 is provided with a hole 71 into which the fixing pin 68 is engaged.

  On the other hand, the base portion of the support body 72 is welded and fixed to the center portion of the vertical operation bar 67, and the rotation shaft 74 is fixed to the support body 72 by welding and fixing the base portion of the fixing release operation lever 73 as a fixing release operation tool. The central portion of the rotary arm 75 is fixed to the rotary shaft 74, and the upper and lower ends of the rotary arm 75 are connected to the left and right fixing pins 68 and 68 by connecting rods 76 and 76, respectively.

  Reference numeral 77 denotes a tension spring provided between the support 72 and the rotation arm 75, which is provided so as to rotate the rotation arm 75 in the direction in which the fixing pin 68 protrudes. This is a stopper member for the vertical operation bar 67 provided on the support 72.

  Therefore, when the operator holds the up / down operation bar 67 and operates the fixing release operation lever 73 downward with his / her finger, the rotating arm 75 rotates against the tension spring 77 and moves to the connecting rods 76 and 76. Since the right and left fixing pins 68 and 68 are removed from the holes 71 of the upper fixing member 69 or the lower fixing member 70, the operator holds the vertical operation bar 67 and moves the vertical movable mounting table 66 up or down. When the finger is released from the fixing release operating lever 73, the left and right fixing pins 68 and 68 engage with the holes 71 of the lower fixing member 70 or the upper fixing member 69, and the vertical movable mounting table 66 is again moved to the downward movement position or It is securely fixed in the up position.

  Each of the link mechanisms 65 has different vertical links 65a and 65b, and the seedling tray holding frame 51 can be placed substantially horizontally at the position where the vertically movable mounting table 66 is moved down. At the position where the movable mounting table 66 is moved upward, the seedling tray holding frame 51 is configured so that the angle of the vertically movable mounting table 66 changes so that the seedling tray holding frame 51 is mounted with the central mast 54 side inclined low. ing.

  79 is a gas cylinder provided between the central mast 54 and each link mechanism 65, which is provided so as to urge each vertically movable mounting table 66 in the upward movement direction. It is configured so that it can be moved up with a light force when moving up and down the movable table 66 while holding 67.

Here, the configuration of the seedling tray holding frame 51 will be described.
The seedling box holding frame 51 is formed with three stages of storage shelves 51a made of bars that can store the seedling box C with an appropriate interval in the vertical direction, and the seedling box C is formed on the storage shelf 51a. Is placed and accommodated. When the seedling box C is stored in the storage shelf 51a, one end in the longitudinal direction of the seedling box C is in a state of protruding outward from the end of the storage shelf 51a. A rectangular opening frame 51b is provided at the end of the storage shelf 51a so as to connect the storage shelves 51a of each stage, and the storage shelf 51b passes through the inside of the opening frame 51b. A seedling box C is supplied to 51a. Further, two stopper shafts 51c in the vertical direction over the storage shelf 51a at each stage are provided at the opposite end of the storage shelf 51a, and the storage shelf is formed by the stopper shaft 51c and the opening frame 51b. The seedling box C of 51a is configured not to come out from other than the opening frame 51b side. Further, since the opening frame 51b protrudes below the lowermost storage shelf 51a in a state where the storage shelf 51a is directed in the horizontal direction (substantially horizontal direction), a substantially horizontal surface such as the ground surface is formed. When the seedling box holding frame 51 is placed on the storage shelf 51a, the accommodation shelf 51a is slightly inclined so that the opening frame body 51b is on the upper side, and the seedling box C is difficult to come out from the opening frame body 51b side.

  In use, the seedling box C in which seedlings are grown in a seedling house or the like is accommodated in the seedling box holding frame 51, and the seedling box holding frame 51 is mounted on a transport vehicle such as a light four-wheel truck. The seedling box C is supplied together with the seedling box holding frame 51 to the seedling transplanter 1 in the field. Therefore, by using the seedling box holding frame 51, the seedling box C can be supplied to the seedling transplanter 1 every plural number (three), so that the seedling supply operation to the seedling transplanter 1 can be easily performed. .

  That is, in order to load the seedling box holding frame 51 containing the seedling box C that has been nurtured into the preliminary seedling mounting device 50, first, the vertical operation bar 67 of the vertically movable mounting table 66 is grasped, and the unlocking operation lever is operated with a finger. 73 is operated downward, the right and left fixing pins 68 and 68 are removed from the holes 71 of the upper fixing member 69 and the vertically movable mounting table 66 is moved downward. The fixing pins 68 and 68 are engaged with the holes 71 of the lower fixing member 70 so that the vertically movable mounting table 66 is securely fixed at the downward movement position. Then, the seedling box holding frame 51 is pushed and placed from the outside while being guided by the vertically movable placing table 66. Thereafter, the vertical operation bar 67 is again gripped, and the fixing release operating lever 73 is operated downward with a finger, the left and right fixing pins 68 and 68 are removed from the holes 71 of the lower fixing member 70, and the vertically movable mounting table 66 is moved. Is moved upward, the finger is released from the fixing release operation lever 73, and the left and right fixing pins 68 and 68 are engaged with the holes 71 of the upper fixing member 69, so that the vertically movable mounting table 66 is securely in the upward movement position. Fix it. Next, the seedling box holding frame 51 is pushed from the outside and placed on the fixed mounting table 64 below the vertically movable mounting table 66 on which the seedling box holding frame 51 is placed. Similarly, the seedling box holding frame 51 is mounted on all the vertically movable mounting tables 66 and the fixed mounting table 64.

  Then, when the seedlings of the transplanting device 9 are reduced along with the planting operation, the operator appropriately loads the seedling box C in the preliminary seedling mounting device 50 into the seedling box loading unit 17a of the transplanting device 9 together with the seedling box C. Go. At this time, if the rotation fixing release lever 60 is operated to rotate the preliminary seedling placement device 50 and fix the seedling box C at an angle at which it can be easily taken out, the seedling box C in the preliminary seedling placement device 50 is transferred to the seedling of the transplanting device 9. The work of loading the box loading unit 17a can be performed efficiently and easily, and the workability is good.

  In addition, in a state where each of the vertically movable mounting tables 66 is fixed at the position where it is moved upward, all of the vertically movable mounting tables 66 and the fixed mounting tables 64 are inclined so that the seedling tray holding frame 51 is low on the central mast 54 side. Since the seedling box C is prevented from falling off, the transplanting operation can be performed appropriately and efficiently. In addition, when the vertically movable mounting table 66 is fixed at the position where it is moved downward, the seedling tray holding frame 51 is mounted substantially horizontally, so the seedling box holding frame 51 is pushed into the vertically movable mounting table 66 from the outside. This makes it easy to perform the mounting work, and the workability is good. Further, each of the vertically movable mounting tables 66 is fixed with a vertical operation bar 67. The operator holds the vertical operation bar 67 and moves the vertically movable mounting table 66 up and down. However, since an unlocking operation lever 73 for releasing the fixing of the vertically movable mounting table 66 is provided near the vertical operation bar 67, the operator holds the grip while holding the vertical operation bar 67 with one hand. The fixation release operation lever 73 can be operated with one hand or the other hand, and the vertical movement and fixing operation of each vertical movable mounting table 66 can be easily and efficiently performed. Therefore, the seedling replenishment work and the seedling supply work can be performed efficiently, the work time of the whole seedling transplanting work can be shortened, and the seedling transplanting work efficiency is improved.

  In the embodiment of the present invention, the seedling transplanting machine 1 for planting the seedlings in the seedling box C to the field has been described in detail. However, the present invention is not limited to this, and a mat-like seedling is supplied. It may be used for any seedling transplanting machine such as a seedling transplanting machine.

Hereinafter, a method for sowing and raising seedlings such as cabbage in a shallow box-shaped seedling box 100 such as a rice seedling box (a typical seedling box having a length of 30 cm, a width of 60 cm, and a depth of 3 cm) will be described.
The seedling box 100 is supplied to the transfer start end of the seeding machine in which the floor material supply device, the pressure reducing / seeding hole punching device, the seeding device, the soil covering device, the drug application device, and the irrigation device are arranged on the transfer conveyor for transferring the seedling box 100. Then, the floor soil is supplied by the floor material supply device, and then, the pressing and sowing drilling device performs the pressing and soaking and sowing drilling. And it is seeded by a seeding device, and the soil covering is supplied by the soil covering device. Thereafter, granular fertilizer (Oncor Ortran granule etc.) is supplied by the application device, and finally irrigation is performed by the irrigation device, and the sowing operation is completed.

At this time, the seeding operation is performed so that the height h from the bottom surface of the seedling box 100 to the top surface of the medicine is smaller than the depth H of the inner surface of the seedling box 100.
Then, the seedling boxes 100... That have been sown are stacked and irrigated indoors until germination is completed for germination.

After germination, when the cotyledons develop, the nursery boxes 100 are placed side by side on a nursery bed in an outdoor field, and large seedlings are grown using the seed bed nutrients.
In this way, stacking the seedling boxes 100 after finishing the sowing work, irrigating indoors until germination is completed, and germinating the seedlings. Obtainable. In addition, since the seeding operation is performed so that the height h from the bottom surface of the seedling box 100 to the top surface of the medicine is smaller than the depth H of the inner surface of the seedling box 100, the seedlings are grown even if the seedling boxes 100 are stacked. The drug does not adhere to the bottom surface of the box 100. However, since the drug application has been completed at the time of sowing work, the work of spraying agricultural chemicals at the initial stage of raising seedlings is unnecessary, and the work efficiency is good.

  Then, by raising the seedlings in the seedling box 100, all the seedlings become uniform. However, if one seedling is taken out from the seedling box 100 and each seedling is separated and taken out, , Bare seedlings can be obtained easily and workability is very good.

In the following, the soybean seed sowing machine will be described.
24 has a floor material supply device 201, a leveling device 202, a irrigation device 203, a seeding drilling device 204, a seeding device 205, a soil covering device 206, a leveling device on a transfer conveyor 200 for transferring the seedling box C. The flat devices 207 are arranged in order.

  In particular, a drilling projection 204 ′ that penetrates into the floor soil in the cell 1 of the seeding drilling device 204 from above to open a seeding hole is a rectangular flat surface having a tip surface of 20 mm on one side and a side of 9 mm on the other side. The shape is a truncated quadrangular pyramid, and is configured so that a sowing hole can be formed in a shape where two seeds of shrimp just enter. That is, the seeds of green soybeans are about 7 mm to 9 mm in diameter, so that a seeding hole is formed in a shape in which two green soybean seeds are placed side by side.

  In addition, since the floor soil is put into the cell 1 by the floor material supply device 201 and then irrigated by the irrigation device 203, and then the seeding hole is opened by the seeding drilling device 204, the floor material supply device 201 Even when the moisture of the floor soil put in the cell 1 is low, the water is irrigated by the irrigation device 203 to increase the moisture of the floor soil and the sowing hole is drilled by the sowing hole drilling device 204. Holes can be formed and good sowing work can be performed.

Hereinafter, an example in which two seeds of green soybeans are sown in the cell 1 of the seedling box C by using a sowing plate will be described.
The seeding plate 300 includes a general shallow box-shaped base 301 and a slide plate 302 that is slidable with respect to the base 301. In the mother body 301 and the slide plate 302, a seeding hole 303 with a diameter of 12 mm through which the seeds of green beans (the diameter of the green beans is about 7 mm to 9 mm) passes is formed in each cell 1 of the seedling box C. It is opened in the corresponding position.

  Further, a cylindrical body 304 having an inner diameter of 12 mm is provided below each seeding hole 303 of the mother body 301, and two green soybean seeds are placed in each of the cylindrical bodies 304. Yes.

  The slide plate 302 is urged by a spring and is usually in a state where the sowing holes 303 of the mother body 301 do not coincide with the sowing holes 303 of the slide plate 302. That is, the lower surface of each cylindrical body 304 is shielded by the slide plate 302.

  Therefore, when a large number of green soybean seeds are put on the upper surface of the shallow box-shaped mother body 301 of the sowing plate 300 and the soybean seeds are put in the seeding holes 303 of the mother body 301, 2 seeds of green soybeans are put in each of the sowing holes 303. It will be in a state of entering one by one.

  Next, the slide plate 302 is slid against the urging force of the spring so that each tube 304 of the seeding plate 300 is positioned above each cell 1 of the seedling box C containing the floor soil. When the sowing holes 303 of the mother body 301 and the sowing holes 303 of the slide plate 302 coincide with each other, two seeds of green beans that are contained in each of the sowing holes 303 of the mother body 301. It falls into the inside and two seeds are sown in each cell 1.

  Thus, two seeds can be sown easily in each cell 1 of the seedling box C with the soy bean seeding plate 300. In addition, the sowing plate 300 is provided with a cylindrical body 304... At a lower portion of each sowing hole 303... Of the mother body 301, so that two soy bean seeds are placed in each sowing hole 303. Can do. Therefore, since the sowing plate 300 is lightweight, the operator can easily perform the sowing work.

3 is a perspective view showing a seedling box C. FIG. 2 is a plan view of a cell 1 of a seedling box C. FIG. It is A1-A2 sectional drawing of FIG. It is sectional drawing for effect | action description when raising the seedling of an onion in the cell 1 of the seedling box C. FIG. It is a side view of the seeder A. It is sectional drawing of the cell 1 of the seedling box C which shows another sowing example. It is sectional drawing of the cell 1 of the seedling box C which shows another sowing example. It is a side view which shows the whole seedling transplanter. It is a top view which shows the front part of a seedling transplanter. It is a side view which shows the principal part of a seedling transplanter. It is a rear view which shows the principal part of a seedling transplanter. It is a side view which shows the principal part of the seedling transplanting machine made into another structure. It is a side view which shows the principal part of the seedling transplanting machine made into another structure. It is a side view which shows the operation state of the principal part of a seedling transplanter. 3 is a side view of a preliminary seedling placement device 50. FIG. 3 is a plan view of a preliminary seedling placement device 50. FIG. 4 is an enlarged side view of a main part of a lower portion of the preliminary seedling placement device 50. FIG. 3 is an enlarged plan view of a main part of a lower part of the preliminary seedling placement device 50. FIG. FIG. 5 is a side view for explaining an enlarged action of a main part of the preliminary seedling placement device 50. 3 is a perspective view of a seedling tray holding frame 51. FIG. 4 is a side view of a seedling tray holding frame 51. FIG. It is a perspective view for explaining the operation of the seedling tray holding frame 51. It is a sectional side view which shows the method of sowing and raising a seedling seedling. It is a side view of a green soybean seeding machine. It is action | operation explanatory drawing which makes the sowing hole of a soybean seeding machine. It is a perspective view of the drilling protrusion 204 'which opens the sowing hole of a green soybean seeder. It is a side view explaining the effect | action of the sowing plate for green beans.

Explanation of symbols

8: Seedling transplanter 9: Transplanting device 10: Traveling vehicle body 50: Preliminary seedling mounting device 51: Seedling box holding frame 64: Fixed mounting table 65: Link mechanism 66: Vertically movable mounting table 67: Vertical operation tool (vertical operation) bar)
73: Unlocking operation tool (unlocking operation lever)
C: Seedling box

Claims (2)

  In the seedling transplanting machine in which the traveling body 10 is equipped with the transplanting device 9 and the preliminary seedling placement device 50, the preliminary seedling placement device 50 places a fixed placement table on which a seedling box holding frame 51 containing a plurality of seedling boxes C is placed. 64 and an up / down movable mounting table 66 that can be moved up and down by a link mechanism 65 and fixed at an upper moving position and a lower moving position are provided above the fixed mounting table 64. A seedling transplanting machine characterized in that an operation tool 67 is provided, and a fixing release operating tool 73 for operating fixing and unlocking of the vertically movable mounting table 66 is provided near the vertical operating tool 67.   When the vertically movable mounting table 66 is fixed at a position where it is moved upward, the vertically movable mounting table 66 is inclined at a low inside, and when the vertically movable table 66 is fixed at a position where it is moved downward, it is substantially the same. The seedling transplanter according to claim 1, wherein the seedling transplanter is in a horizontal state.

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