JP2018117533A - Seeder and seeding apparatus with seeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seeder capable of adjusting seeding quantities and uniformly seeding to seedling boxes.SOLUTION: A seeder 11 comprises: a seed hopper 60 with an upper face open to receive seed; two delivery rollers 62 for receiving the seed from the seed hopper 60 and dropping the seed to seedling boxes 17; and two roller drive motors 63 for rotatingly driving the two delivery rollers 62. When the first seedling box 17 reaches under the rear delivery roller 62 in an upstream side in a conveying direction, only the rear delivery roller 62 is driven rotatingly; when the first seedling box 17 reaches under the front delivery roller 62 in a downstream side in the conveying direction, the front delivery roller 62 is driven rotatingly along with the rear delivery roller 62.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a sowing apparatus installed in a sowing facility for performing sowing work such as soiling in a seedling box and sowing and covering soil.

  Conventionally, in a sowing facility, a seeding device is installed to carry out soiling, sowing and covering soil in order while conveying a plurality of seedling boxes. A seeder in such a seeding device seeds seeds received by a hopper on a seedling box into which floor soil has been thrown by rotating a feed roller and dropping the seeds (see Patent Document 1). . In order to increase the efficiency of sowing work, a sowing machine in which two feeding rollers are arranged side by side has been proposed (see Patent Document 2).

Japanese Patent No. 3963877 JP-A 64-51011

  However, since Patent Document 1 has a configuration in which the seeding operation is performed by a single feeding roller, when the seeding amount increases, it is necessary to increase the rotation speed of the feeding roller. Depending on the capacity, there is a limit to the seeding rate. For this reason, it is necessary to prepare a plurality of roll units according to the sowing amount, and to exchange each time the sowing amount is changed, which makes the work complicated. Further, although Patent Document 2 has a structure in which two feeding rollers are arranged side by side, both the feeding rollers are driven at the same time, so even if there is no seedling box below one of the feeding rollers, it is wasteful. Sowing work is executed.

  This invention makes it a technical subject to provide the sowing machine and the sowing apparatus which improved after examining the above present conditions.

  The present invention is a seeding machine comprising a seed hopper that is open at an upper surface and receives seeds, and a feeding roller that receives seeds from the seed hopper and drops the seeds into a seedling box, wherein the feeding rollers move back and forth along the conveying direction. When the first raising seedling box reaches below the rear feeding roller on the upstream side in the conveying direction, the pair of front and rear feeding rollers are arranged to be paired and are independently rotated by two roller drive motors. Further, only the rear feeding roller is rotationally driven, and when the first seedling box reaches below the front feeding roller on the downstream side in the conveying direction, the front feeding roller is rotationally driven together with the rear feeding roller. .

  In the seeder, when the last seedling box passes under the rear feeding roller, only the rear feeding roller stops rotating, and when the last seedling box passes under the front feeding roller. The front feeding roller may stop rotating together with the rear feeding roller.

  In the seeder, the pair of front and rear feeding rollers may be composed of rollers having the same diameter, and the rotation of the pair of front and rear feeding rollers may be opposite to each other.

  In the above seeding machine, the seed drop dropping direction from the front feed roller is opposite to the feeding direction of the seedling box, while the seed drop dropping direction from the rear feed roller is the same direction as the seedling box transfer direction. The rotation speed of the front feeding roller may be slower than the rotation speed of the rear feeding roller.

  In the present invention, a first seeder configured by the seeder and a second seeder that drives a single feeding roller with a single driving device are alternatively selected and installed. , A seeding device comprising a transporting device for transporting a seedling box to be seeded, and a controller for controlling the first seeding machine or the second seeding machine and the transporting device, wherein the controller comprises the first seeding When the machine is installed in the transport device, the transport speed of the transport device is fixed and the rotation speed of the feeding roller is changed according to the seeding amount, while the second seeder is installed in the transport device. In this case, the rotation speed of the feeding roller is made constant, and the transport speed of the transport device is changed according to the seeding amount.

  According to the present invention, since the two roller drive motors are individually controlled and the rotation speed of the feeding roller is individually set, seeds can be uniformly sown in the breeding box regardless of the sowing amount. Further, the number of rotations of the individual feeding rollers can be controlled, the seeding amount can be adjusted with high accuracy, and the load on the roller drive motor can be reduced even when the seeding amount is large. In addition, when the first seedling box is carried in, the front feeding roller is driven after the rear feeding roller is driven, so that it is possible to prohibit useless seeding operation by the front feeding roller when there is no seedling box directly under the front feeding roller. In addition, power saving can be achieved.

  According to the present invention, when the last seedling box is carried in, the front feeding roller is stopped after stopping the rear feeding roller, so that there is no waste seeding operation by the rear feeding roller in the state where there is no seedling box directly under the rear feeding roller. Not only can be prohibited, but also can save power.

  According to the present invention, by rotating the rotation direction of the pair of front and rear feeding rollers in the reverse direction, the seeding direction from each of the pair of front and rear feeding rollers is reversed with respect to the conveying direction of the seedling box, so Can solve the shortage of seeding at the corner. In addition, since the sowing direction from each feeding roller is different from the feeding direction of the seedling box, the seeding shortage at the corner side of the seedling box can be solved.

  According to the present invention, by setting the rotational speed of the post-feed roller that drops the seed in the same direction as the transport direction, faster than the rotational speed of the front feed roller that drops the seed in the direction opposite to the transport direction of the seedling box, Since the relative speed of seeds dropped from the front and rear feeding rollers with respect to the seedling box can be made closer, seeds can be seeded accurately and uniformly in the seedling box.

  According to the present invention, depending on the number of feeding rollers of the seeding machine, either the transport speed of the transport device or the rotation speed of the feeding roller can be set constant, so that the seedling box is uniformly seeded according to the sowing amount. In addition, it is possible to suppress the load on the driving device of the seeder and prevent the seeder from being broken or damaged.

It is a schematic plan view which shows the whole structure of the sowing plant | facility used as embodiment of this invention. It is a schematic side view of the sowing work room in the sowing facility. It is an external appearance perspective view which shows the structure of the sowing apparatus in the sowing facility. It is a right view of the sowing apparatus. It is a top view of the sowing apparatus. It is a left view of the conveyance upstream part in the seeding device. It is a left view of the conveyance downstream part in the sowing apparatus. It is a right view of the sowing unit in the sowing apparatus. It is a top view of the conveyance upstream part in the seeding unit. It is a top view of the conveyance downstream part in the seeding unit. It is a perspective view from the upper left side of the seeding unit. It is a perspective view from the right side of the sowing unit. It is a disassembled perspective view of the seeder in the seeding unit. It is side surface sectional drawing of the seeder. It is a perspective view which shows the structure of the feeding roller of the seeder. It is explanatory drawing which shows the sowing operation | movement of the seeder. It is a flowchart which shows the seeding operation | movement of the seeder. It is an external appearance perspective view which shows the structure of the sowing apparatus provided with the sowing machine by the single feeding roller. It is a right view of the sowing apparatus. It is a right view of the sowing unit in the sowing apparatus. It is a flowchart which shows the parameter setting operation | movement by the sowing amount in a sowing apparatus.

1. Overall configuration of sowing facility The overall configuration of the sowing facility provided with the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing a sowing facility, FIG. 2 is a schematic side view of a sowing work room in the sowing facility, and FIG. 3 is an external perspective view showing a configuration of a sowing apparatus in the sowing facility.

  As shown in FIG. 1, the sowing facility has a seed treatment chamber 1 including a soaking tank and a salt water disinfection tank in which seeds (seeds, etc.) are immersed in water for germination, and raw soil and floor soil for forming floor soil and covering soil. Seeding chamber 2 for storing fertilizers and pesticides to be mixed, seeding chamber 3 in which seeding device 8 for supplying floor soil, seeds and covering soil to seedling box 17 is installed, and seeding chamber 3 The seedling box 4 into which the seedling box 17 that has been brought in is brought into germination, and the greening room 5 in which the seedling box 17 that has emerged in the germination room 4 is brought in and raised for a certain period of time are constituted. The budding room 4 and the greening room 5 are partitioned by a sliding door or the like, and are configured to adjust the temperature and humidity according to the growth of rice seedlings and various vegetable seedlings.

  As shown in FIG. 1 and FIG. 2, in the sowing work chamber 3, the sowing apparatus 8 includes a sowing carrier conveyor (conveying device) 9 that transports the seedling box 17 and a seedling box 17 that transports the sowing carrier conveyor 9. An earthing machine (floor soil supply device) 10 for introducing floor soil, a seeder (seed supply device) 11 for seeding seeds in a seedling box 17 spread with floor soil, and a seedling box 17 seeded with seeds And a soil covering machine (soil covering supply device) 12 for charging the soil. In addition, a floor soil tank 14 for storing the floor soil supplied from the cultivation soil storage chamber 2 is provided above the earth placing machine 10, and a seed tank 15 for storing seeds (germination buds) germinated in the seed treatment chamber 1. However, a soil covering tank 16 that is provided above the seeding machine 11 and stores the soil covering supplied from the cultivation soil storage chamber 2 is provided above the soil covering machine 12.

  As shown in FIG. 2, a sowing work room 3 is configured on the first floor of the sowing facility, and on the second floor of the sowing facility, stacked nursery boxes in which cleaned empty seedling boxes 17 are stacked in multiple stages. 17A is stored on a stock conveyor (not shown). A standby conveyor 19 is installed at the end of the stock conveyor to receive and wait for a set of stacked seedling boxes 17A. The standby conveyor 19 is a set of stacked seedling boxes from the second floor to the first floor of the sowing facility. It is connected to a seedling box automatic supply device 20 for lowering 17A. The seedling box automatic supply device 20 separates the seedling box 17 from the lift 21 that lowers the stacked seedling box 17A and the stacked seedling box 17A that is lowered to the first floor, and supplies the seedling box 17 to the seeding device 8 A box separation and supply machine 22.

  A seedling box separation and supply machine 22 of the seedling box automatic supply device 20 is arranged on the feed start end side of the seeding transport conveyor 9, and the seedling box 17 sequentially fed from the seedling box separation and supply machine 22 is a seeding transport conveyor 9. To be supplied. On the other hand, a box discharge conveyor 23 is disposed on the feeding end side of the sowing conveyor 9, and the seedling seedling boxes 17 sent from the box discharge conveyor 23 are stacked and mounted on the seedling carriage 24. When the seedling carriage 24 loaded with the sowing seedling box 17 is transported to the germination chamber 4 in the next step, it is stored in the germination chamber 4 for a predetermined period. The seedling carriage 24 loaded with the seedling box 17 budding in the budding room 4 is transported to the greening room 5 in the next process and stored in the greening room 5 until the seedlings are grown to a predetermined size. In addition, when the seedling carriage 24 is different in the budding room 4 and the greening room 5 according to the growing state of the seedlings, the seedling box 17 budding in the budding room 4 is a seedling cart (budding) for the budding room 4. (Carriage) 24 is transshipped to nursery car (greening car) 24 for greening room 5.

2. Sowing device Next, the sowing device 8 installed in the sowing work chamber 3 will be described below with reference to FIGS. As shown in FIGS. 3 to 7, the seeding device 8 includes a floor soil unit 8A in which the earthing machine 10 is installed on the floor soil conveyor 9A, a seeding unit 8B in which the seeder 11 is installed on the seeding conveyor 9B, A soil covering unit 8C having a soil covering machine 12 installed on a conveyor 9C is connected in series. That is, the seeding device 8 is configured by connecting the floor soil unit 8A, the seeding unit 8B, and the soil covering unit 8C in this order in accordance with the conveying direction of the seedling box 17. In the following description, as shown in FIG. 3 and the like, the conveyance direction of the sowing conveyor 9 is the front-rear direction, and the width direction of the sowing conveyor 9 is the left-right direction.

  Further, the seeding transport conveyor 9 is configured to be separable for each of the units 8A to 8C. By connecting the floor soil conveyor 9A, the seeding conveyor 9B, and the soil covering conveyor 9C, the seedling box separating and supplying machine 22 is connected. It is comprised as a conveying apparatus which conveys the seedling box 17 of this. That is, the transport direction end side of the floor soil conveyor 9A and the start direction side of the sowing conveyor 9B are connected via the relay conveyor 9D, and the start direction side of the cover soil conveyor 9C is connected to the end direction of the sowing conveyor 9B. The seeding conveyor 9 is connected to each other.

  Each of the conveyors 9A to 9D extends the seedling raising box 17 from the side edge frame 27 by guide rollers 28 supported by a pair of left and right side edge frames 27 supported by leg frames 26 erected from the floor surface. Transport along the direction. Further, a carry-in belt 29 is provided at the carry-in portion on the transport start end side of the floor soil conveyor 9A, and the seedling box 17 received from the seedling box automatic supply device 20 is guided to the guide roller 28 of the floor soil conveyor 9A. The Moreover, the connection part 30 connected with each conveyance termination | terminus side of conveyor 9D, 9B, 9C, 9A is provided in the conveyance start end side of each conveyor 9B-9D, This conveyor part 30 connects conveyor 9A-9D As a result, power from a later-described transport motor 37 is transmitted to the guide rollers 28 and the carry-in belts 29 of the conveyors 9A to 9D.

  The floor soil unit 8A is constructed by laying the earthing machine 10 on the left and right side edge frames 27 in the floor earth conveyor 9A, and the carry-in part on the upstream side (rear side) of the earthing machine 10 includes: A height restricting portion 31 is provided. The height restricting portion 31 conveys the tip of the restricting plate provided so as to incline toward the front lower side on both the left and right sides to the upper side of the left and right side walls of the nursery box 17, thereby conveying it to the earthing machine 10. The height position of the seedling box 17 is regulated. As a result, the nursery box 17 is continuously conveyed on the floor soil conveyor 9A one by one without overlapping the upper and lower sides on the downstream side (front side) in the conveying direction from the height regulating portion 31.

  Further, on the downstream side (front side) of the soil transfer machine 10 of the floor soil unit 8A, a leveling machine 32 for leveling the floor soil in the seedling box 17 and excess soil accumulated in the front and rear corners of the seedling box 17 are provided. The leveling machine 33 and the irrigation machine 34 for spraying the floor soil spread in the seedling box 17 are provided in the order of the irrigation machine 34, the cornering machine 33, and the leveling machine 32 from the front side. The leveling machine 32, the cornering machine 33, and the irrigation machine 34 are installed on the left and right side edge frames 27, and the seedling box 17 transported by the floor soil conveyor 9 </ b> A includes the leveling machine 32, the cornering machine 33, And under the irrigator 34 respectively.

  The cornering machine 33 is a front cornering machine 33A that presses the soil accumulated in the front corner of the seedling box 17 so as to level backward, and a rear side that scrapes the soil accumulated in the rear corner of the seedling box 17 while pressing the soil. It is comprised with the cornering machine 33B. Moreover, the irrigation pump 35 is mounted above the irrigation machine 34, and is supplied to the irrigation machine 34 sucked up from the water storage tank etc. by the irrigation pump 35. The irrigation pump 35 is installed on the upper part of the irrigation machine 34, and the irrigation pump 35 is configured integrally with the irrigation machine 34 so that the floor soil unit 8A can be reduced in size and the irrigation pump 35 and the irrigation machine 34 are connected. The water supply route to be used can be shortened.

  The floor soil unit 8A is configured such that when floor soil is first introduced into the seedling box 17 to the seedling box 17 conveyed on the floor soil conveyor 9A, the surface of the floor soil introduced into the seedling box 17 is leveled. Leveled by machine 32. Thereafter, the seedling box 17 in which the floor soil has been leveled passes through the front cornering machine 33A, and after the excess soil at the front corner of the seedling box 17 is scraped or pressed, it passes through the cornering machine 33B. The excess soil at the rear corner of the seedling box 17 is scraped or pressed, and the height of the floor soil at the front and rear corners in the seedling box 17 is leveled. When the seedling box 17 in which the floor soil is uniformly spread in this way is transported to the irrigator 34 by the floor soil conveyor 9A, the water supplied to the irrigator 34 through the irrigation pump 35 is the floor soil of the nursery box 17. Sprayed on the surface.

  The seeding unit 8B is configured by laying the seeder 11 on the left and right side edge frames 27 in the seeding conveyor 9B, and the controller 36 is disposed above the seeding conveyor 9B on the upstream side (rear side) of the seeder 11 on the upstream side. Is installed on the lower side of the seeding conveyor 9B. In addition, on the downstream side (front side) of the sowing machine 11 of the sowing unit 8B, a seed remover 38 that sweeps away the seeds on the front, back, left, and right side walls that are provided around the outer peripheral edge of the seedling box 17 is installed. The controller 36 and the seed remover 38 are installed on the left and right side edge frames 27, and the seedling box 17 conveyed by the sowing conveyor 9B passes under the controller 36 and the seed remover 38, respectively.

  The controller 36 is electrically connected to the earthing machine 10, the seeding machine 11, the earthing machine 12, the irrigation pump 35, and the conveyance drive motor 37, and the seeding machine 11, the earthing machine 12, the irrigation pump 35, and the conveyance The drive of each drive motor 37 is controlled. That is, the controller 36 controls the operations of the earthing machine 10 and the earth covering machine 12, thereby adjusting the amount of floor soil and the amount of earth covering thrown into the seedling box 17 and controlling the operation of the seeder 11. The irrigation amount to the seedling box 17 by the irrigators 34 and 39 is adjusted by adjusting the seeding amount in the seedling box 17 and controlling the operation of the irrigation pump 35. Further, the controller 36 adjusts the conveyance speed of the seedling box 17 by the sowing conveyance conveyor 9 by controlling the operation of the conveyance drive motor 37.

  The transport drive motor 37 is driven in response to a signal from the controller 36, and its rotational speed is controlled. The rotational power from the conveyance drive motor 37 is transmitted to the conveyance chain 41 provided on the side edge frame 27 of the seeding unit 8B through the power transmission mechanism 42, thereby rotating the guide roller 28. Moreover, the power relay mechanism 43 is provided in each connection part 30 in the sowing apparatus 8, and the rotational power from the drive motor 37 for conveyance is transmitted to the conveyance chain 41 in each conveyor 9A-9D. Thereby, the guide roller 28 in each conveyor 9A-9D rotates, and the leveling machine 32, the seed remover 38, and the soil covering machine 40 operate | move, respectively.

  The sowing unit 8B receives the seedling box 17 in which the floor soil after irrigation is spread from the floor soil conveyor 9A of the floor soil unit 8A via the relay conveyor 9D by the seeding conveyor 9B, and raises the seedling to the lower side of the seeder 11 The box 17 is conveyed. As the seeding conveyor 9B conveys the seedling box 17, the seedling box 17 passes below the seeding machine 11 and the seed dropping machine 38. Thereby, after seeds are sown in the seedling box 17 by the seeder 11, the seeds sown on the upper surface of the side wall of the seedling box 17 are swept away by the seed remover 38.

  The soil covering unit 8 </ b> C is configured by laying the soil covering machine 12 on the left and right side edge frames 27 in the soil covering conveyor 9 </ b> C, and the irrigation water supplied from the irrigation pump 35 on the upstream side (rear side) of the soil covering machine 12. On the other hand, on the downstream side (front side) of conveyance with respect to the soil covering machine 12, a soil removing machine 40 for sweeping off the soil covering on the front, back, left and right side walls of the seedling box 17 is installed. The controller 36 and the soil covering machine 40 are installed on the left and right side edge frames 27, and the seedling box 17 conveyed by the soil covering conveyor 9 </ b> C passes below the irrigator 39 and the soil removing machine 40.

  The soil covering unit 8C receives the seedling box 17 after sowing from the seeding conveyor 9B of the seeding unit 8B with the soil covering conveyor 9C, and conveys the seedling box 17 below the irrigator 39. By the soil covering conveyor 9 </ b> C transporting the seedling box 17, the seedling box 17 passes under the irrigator 39, the soil covering machine 12 and the soil covering machine 40. Thus, first, water supplied to the irrigation machine 34 through the irrigation pump 35 is sprayed on the surface of the floor soil after sowing of the seedling box 17, and then the soil covering machine 12 drops the covering soil onto the seedling box 17. When the seedling box 17 passes through the soil covering machine 12, when the soil covering is spread on the floor soil surface after sowing, the soil removal machine 40 sweeps off the excess soil (covering soil) dropped on the upper surface of the side wall of the seedling box 17. Be dropped.

3. Sowing unit Details of the sowing unit 8B in the above-described sowing apparatus 8 will be described below with reference to FIGS. As shown in FIGS. 7 to 12, the sowing unit 8B includes a sowing conveyor 9B connected to the terminal end side of the relay conveyor 9D by the connecting portion 30, and the controller 36, the sowing machine 11, and the seed remover 38 carry it. The transfer drive motor 37 is suspended and supported by the seeding conveyor 9B at a position below the controller 36 while being placed on the seeding conveyor 9B in order from the upstream side in the direction.

  As shown in FIGS. 7 to 12, the sowing conveyor 9 </ b> B has a leg frame 26 erected from the floor with two side edge frames 27 extending in parallel along the front-rear direction (feeding direction of the seedling box 17). It has the structure supported by. In addition, a plurality of beam frames 44 are installed on the pair of left and right side edge frames 27 so that the left and right side edge frames 27 are installed at equal intervals, and the guide rollers 28 are provided on the left and right sides. Further, a roller shaft 45 (including roller shafts 45F and 45B on the front and rear end sides of the seeding conveyor 9B) is rotatably mounted on both of the two side edge frames 27. The roller shaft 45 is disposed at equal intervals along the front-rear direction, and the left and right ends of the roller shaft 45 are pivotally supported through the left and right side edge frames 27.

  Further, on the outer side (left side) of the left edge frame 27, the conveyance chain 41 is stretched along the side edge frame 27, and a conveyance sprocket 46 that meshes with the conveyance chain 41 is fixed to the left end of the roller shaft 45. Yes. The transport chain 41 is wound around a plurality of transport sprockets 46 disposed along the side edge frame 27 and an auxiliary sprocket 47 disposed on the lower side of the transport sprocket 46. In the present embodiment, auxiliary sprockets 47 are rotatably supported at three locations on the front edge side, the rear end side, and the center of the side edge frame 27, and the upper side of the transport chain 41 meshes with the transport sprocket 46. On the other hand, the lower side of the transport chain 41 meshes with the auxiliary sprocket 47.

  Among the roller shafts 45 in the seeding conveyor 9B, the roller shaft 45F on the front end side (downstream side in the transport direction) of the seeding conveyor 9B and the roller shaft 45B on the rear end side (upstream side in the transport direction) of the seeding conveyor 9B respectively The roller shaft 45 protrudes to the left from the left end. Each of the front and rear end side roller shafts 45F and 45B passes through the relay sprocket 48 so as not to rotate on the left side (outside) of the transport sprocket 46. The relay sprocket 48 of the front end side roller shaft 45F, together with the relay sprocket 48 of the rear end side roller shaft 45B of the soil covering conveyor 9C, has a transport relay chain 49 wound around the outer periphery thereof. Similarly, the relay sprocket 48 of the rear end side roller shaft 45B, together with the relay sprocket 48 of the front end side roller shaft 45F of the relay conveyor 9D, has a transport relay chain 49 wound around the outer periphery thereof.

  The front ends of the left and right side edge frames 27 in the seeding conveyor 9B are connected to the rear ends of the left and right side edge frames 27 in the soil covering conveyor 9C by a connection bracket 50. Similarly, the rear ends of the left and right side edge frames 27 in the seeding conveyor 9B are connected to the front ends of the left and right side edge frames 27 in the relay conveyor 9D by the connection bracket 50. An auxiliary sprocket 51 is rotatably supported on a connection bracket 50 fixed to the front and rear sides of the side edge frame 27. The power relay mechanism 43 is configured at the front and rear ends of the seeding conveyor 9B by surrounding the transport relay chain 49 around the auxiliary sprocket 51 of the connection bracket 50 and the relay sprocket 48 described above.

  In the seeding conveyor 9B, the left end of the rear end side roller shaft 45B protrudes to the left of the left end of the front end side roller shaft 45F, and the input sprocket 52 is non-rotatably attached to the left end of the rear end side roller shaft 45B. ing. In other words, the conveying sprocket 46, the relay sprocket 48, and the input sprocket 52 are sequentially arranged on the rear end side roller shaft 45B from the left side (outside) of the side edge frame 27 toward the left end of the rear end side roller shaft 45B. Yes. Further, the motor shaft 53 of the conveyance drive motor 37 projects leftward (outside), and the output sprocket 54 is non-rotatably attached to the tip (left end) of the motor shaft 53. A transport drive chain 55 is provided around the outer periphery of the input sprocket 52 at the left end of the rear end side roller shaft 45B and the output sprocket 54 at the tip of the motor shaft 53.

  The transport drive motor 37 is suspended and fixed to the side edge frame 27 via the motor mounting frame 56, and is disposed below the rear end side roller shaft 45B. That is, the motor mounting frame 56 is bolted to the lower ends of the left and right side edge frames 27 so that the transport drive motor 37 projects the motor shaft 53 from the left side edge frame 27 toward the left side. The motor mounting frame 56 is bolted. Further, the left side of the left edge frame 27 and the right side of the right edge frame 27 are covered with the side cover 57, and the connecting portions 30 provided at the front and rear ends of the left edge frame 27 are covered with the connecting portion cover 58.

  In the seeding conveyor 9 </ b> B, when rotational power from the transport drive motor 37 is output from the output sprocket 54 of the motor shaft 53, it is transmitted to the input sprocket 52 via the transport drive chain 55. When the input sprocket 52 rotates based on the rotational power from the transport drive motor 37, the transport sprocket 46 and the relay sprocket 48 that are coaxial with the input sprocket 52 and the rear end side roller shaft 45B rotate together with the rear end side roller shaft 45B. To drive. By rotating the transport sprocket 46 of the rear end side roller shaft 45B, the transport sprocket 46 in all the roller shafts 45 including the front and rear end side roller shafts 45F and 45B rotates via the transport chain 41. Thereby, the guide roller 28 in the sowing conveyor 9B is rotated, and the seedling box 17 is conveyed on the sowing conveyor 9B.

  In addition, since the front and rear end side roller shafts 45F and 45B rotate, the relay sprocket 48 of the front and rear end side roller shafts 45F and 45B rotates, so that the soil covering conveyor 9C and the relay conveyor 9D are respectively connected via the transfer relay chain 49. Rotational power from the conveyance drive motor 37 can be transmitted. Further, the rotational power from the transport drive motor 37 is transmitted from the relay conveyor 9D to the floor soil conveyor 9A via the connecting portion 30. Thereby, the guide roller 28 in each of the floor soil conveyor 9A, the covering soil conveyor 9C, and the relay conveyor 9D rotates in the same manner as the guide roller 28 of the seeding conveyor 9B, and the seedling box 17 is converted into the floor soil conveyor 9A, the relay conveyor 9D, The seeding conveyor 9B and the soil covering conveyor 9C are conveyed in this order.

  The leg portions of the gate-type gantry frame 59 are fixed to the upper surfaces of the left and right side edge frames 27, so that the gantry frame 59 is installed above the left and right side edge frames 27 at a position overlapping the conveyance drive motor 37. Yes. The controller 36 is placed on the top surface of the gantry frame 59 and is electrically connected to the earthing machine 10, the seeding machine 11, the earth covering machine 12, the irrigation pump 35, the transfer drive motor 37, and the like, so that the floor soil The amount, the sowing amount, the amount of soil covering, the amount of irrigation, and the conveyance speed of the seedling box 17 are controlled. Since the controller 36 is arranged so as to bridge the left and right side edge frames 27, the installation length of the controller 36 along the feeding direction of the seedling box 17 is shortened, and the sowing unit 8B can be configured compactly.

  The seeding machine 11 includes a seed hopper 60 that is open at the top and receives seeds, two feeding rollers 62 that receive seeds from the seed hopper 60 and drop them into the seedling box 17, and two that rotationally drive the two feeding rollers 62. And a roller drive motor 63. The lower side of the seed hopper 60 is formed in a fork, and two seed supply ports 64 are provided at the front and rear. Below each of the seed supply ports 64 of the seed hopper 60, feed rollers 62 whose rotations are opposite to each other are arranged in the front-rear direction. The front and rear feeding rollers 62 are independently driven to rotate by two roller drive motors 63.

  When seeds are received from the seed tank 15 (see FIG. 1 and the like) by the seed hopper 60, seeds are supplied from the front and rear seed supply ports 64 in the seed receiving hopper 61 to the upper and lower feeding rollers 62. When the feeding roller 62 is rotated by the roller driving motor 63, the seeds gripped by the peripheral surface of the feeding roller 62 immediately below the seed supply port 64 move above the seedling box 17, and then dropped onto the seedling box 17.

  At this time, since the front and rear feeding rollers 62 are driven by different roller drive motors 63, the rotation speed of each of the front and rear feeding rollers 62 can be set independently, and the seeding amount in the seedling box 17 can be adjusted with high accuracy. . Even when the seedling box 17 has a large seeding amount, the rotational speed of the roller drive motor 63 can be suppressed, and the load on the roller drive motor 63 can be reduced. Furthermore, since the rotation direction of the front and rear feeding rollers 62 is reversed, the sowing direction from the front and rear feeding rollers 62 is reversed with respect to the conveying direction of the seedling box 17. Can solve the shortage of sowing.

  In the seeder 11, the two roller drive motors 63 are arranged at positions that are symmetrical on the left and right and front and rear. That is, the front roller driving motor 63 that drives the front feeding roller 62 is disposed on the front left side of the front feeding roller 62, and the rear roller driving motor 63 that drives the rear feeding roller 62 is on the rear right side of the rear feeding roller 62. It is arranged above. Thus, by arranging the roller drive motor 63 at a position that is point-symmetric in plan view, the seeder 11 is installed on the seeding conveyor 9B in a well-balanced manner, so that stable seeding operation can be performed.

  As described above, the seeder 11 is formed with the seed hopper 60 under the two sides, the two seed supply ports 64 are provided at the front and the back, and the front and rear feeding rollers whose rotations are opposite to each other below the various child hoppers. 62 is arranged. The front / rear feeding roller 62 is independently rotated by two roller drive motors 63, and the rotational speed of the front / rear feeding roller 62 is individually set according to the conveyance speed of the seedling box 17 and the seeding amount.

  By setting the rotation directions of the front and rear feeding rollers 62 to be opposite to each other, the seeding direction from the front and rear feeding rollers 62 is different from the conveying direction of the seedling box 17, so that there is insufficient seeding at the front and rear corners of the seedling box 17. Can be resolved. At this time, the moving speed of the seedling box 17 can be set in accordance with the work speed of the operator by changing the rotational speed of the front and rear feeding roller 62. Furthermore, by individually controlling the rotational speeds of the front and rear feeding rollers 62, the seeding amount in the seedling box 17 can be adjusted with high accuracy.

  The seed remover 38 is fixed in a position in front of the seeder 11 and partially overlaps with the front part of the seeder 11 and supports a seed remover brush 91 that is rotationally driven. Both ends of the brush rotation shaft 91a of the seed drop brush 91 are rotatably supported by the middle portions of the left and right support plates 93 provided on the left and right side surfaces of the casing 92 fixed to the upper surfaces of the left and right side edge frames 27, respectively. ing.

  The left and right support plates 93 are provided outside the left and right side surfaces of the housing 92, and one end thereof is connected to the height adjusting bolt 94, while the other end is pivotally supported on the left and right side surfaces of the housing 92. On the left and right side surfaces of the housing 92, vertically long through holes are formed so as to penetrate the brush rotation shaft 91 a of the seed drop brush 91. At this time, when the height adjustment bolt 94 is operated, the left and right support plates 93 swing around the shaft support portions on the left and right side surfaces of the housing 92, so that the brush rotation shaft 91a moves up and down along the through hole. And the vertical position of the seed drop brush 91 is adjusted.

  The seed remover 38 supports a rotatable relay shaft 96 on a right support plate 93, and a front end side roller shaft 45F is connected to the right end of the relay shaft 96 via a brush drive output pulley 97 and a brush drive relay chain 101. A brush drive input pulley 98 to which the rotational power is transmitted is attached to the shaft. The brush drive output pulley 97 is pivotally attached to the right end of the front end side roller shaft 45F protruding from the right edge frame 27.

  The relay shaft 96 is provided at a position where the right support plate 93 is pivotally supported to the right side surface of the housing 92. The brush drive relay pulley 99 is fitted to the relay shaft 96 on the right support plate 93 side so as not to be relatively rotatable. It is disguised. The brush rotation shaft 91a of the seed drop brush 91 passes through the right support plate 93, and the brush drive pulley 100 is fitted to the right end of the brush rotation shaft 91a protruding from the seed drop brush 91. The brush drive chain 102 is wound around the outer periphery of the brush drive relay pulley 99 and the brush drive pulley 100, and the rotational power transmitted from the front end side roller shaft 45F to the relay shaft 96 is transmitted to the brush rotation shaft 91a. Is done.

  The seed remover 39 transmits the rotational power of the front end side roller shaft 45F to the brush rotation shaft 91a via the relay shaft 96 by the brush drive relay chain 101 and the brush drive chain 102, thereby the seed drop brush 91. Rotate. The outer peripheral surface of the seed drop brush 91 rotates while contacting the front, rear, left and right side edge upper surfaces of the seedling box 17 passing through the seeding conveyor 9B, thereby sweeping off the seeds on the side edge of the seedling box 17.

4). Seeding machine (seed supply device)
Details of the seeder (seed supply device) 11 in the seeding unit 8B described above will be described below with reference to FIGS. The seeder 11 comprises a seed hopper 60 in two stages, an upper seed receiving hopper 61 and a lower seed arrangement hopper 80. The seeder 11 is provided with a pair of front and rear seed supply ports 64 at the bottom of a seed receiving seed receiving hopper 61 that receives and temporarily stores seeds, and a pair of front and rear feeding rollers below the front and rear seed supply ports 64. 62. The front and rear feeding rollers 62 are independently driven to rotate by a pair of front and rear roller drive motors 63 disposed front and rear with the seed receiving hopper 61 interposed therebetween.

  The front and rear feeding rollers 62 have a roller shaft 65 extending in a direction (left and right direction) perpendicular to the conveying direction of the seedling box 17, and a motor shaft 67 of the roller driving motor 63 via the roller driving chain 66. Is input to the roller shaft 65. That is, the feed-out input sprocket 68 attached to the tip of the roller shaft 65 and the feed-out output sprocket 69 attached to the tip of the motor shaft 67 are wound by the roller drive chain 66, so that the roller drive motor 63 Is transmitted to the feeding roller 62.

  Each of the front and rear feeding rollers 62 is rotatably supported with respect to the pair of left and right side plates 70. The front roller drive motor 63 is fixed to the left side plate 70 and disposed on the upper front side of the front feed roller 62, while the rear roller drive motor 63 is fixed to the right side plate 70 and the upper rear side of the rear feed roller 62. Is arranged. The left end of the roller shaft 65 of the front feed roller 62 and the left end of the motor shaft 67 of the front roller drive motor 63 pass through the left side plate 70 and are connected via the roller drive chain 66 on the left side of the left side plate 70. Similarly, the right end of the roller shaft 65 of the rear feed roller 62 and the right end of the motor shaft 67 of the rear roller drive motor 63 pass through the right side plate 70 and are connected via the roller drive chain 66 on the right side of the right side plate 70. Yes.

  The roller shafts 65 of the front and rear feeding rollers 62 are rotatably supported by bearings 71 fitted in the through holes of the left and right side plates 70. That is, both ends of the roller shaft 65 of the pair of front and rear feeding rollers 62 are pivotally supported via the bearings 71 with respect to the pair of left and right side plates 70 erected from the upper surfaces of the pair of left and right side edge frames 27 in the seeding conveyor 9B. Has been. Accordingly, the pair of left and right side plates 70 grip the pair of front and rear feeding rollers 62 from the left and right, and pivotally support the pair of front and rear feeding rollers 62 at the lower portion of the side plate 70, It is constructed integrally.

  The side plate 70 has a shape in which the upper portion projects in the front-rear direction. The front roller driving motor 63 is fixed to the front projecting portion of the left side plate 70, while the rear roller driving is performed on the rear projecting portion of the right side plate 70. The motor 63 is fixed. That is, although the roller drive motor 63 serving as a vibration source is fixed to the upper portion of the side plate 70, the feeding roller 62 is disposed below the roller drive motor 63 and connects the left and right side plates 70, so that the seeder 11 By suppressing the vibration in the case, it is possible to prevent loosening of the connecting portion and improve durability. Further, a seed remover 39 is disposed below the front projecting portion of the left and right side plates 70, and the front portion of the seeder 11 is installed so as to overlap the seed remover 39. Therefore, the installation length of the seeder 11 and the seed remover 39 can be shortened, and the length of the seeding unit 8B in the conveyance direction (length in the front-rear direction) can be shortened to be compact.

  In the seeder 11, the front and rear roller drive motor 63 is disposed at a position that is point-symmetric in plan view. Therefore, since the front and rear roller drive motors 63 are fixed to the left and right side plates 70, not only the gravity applied to the side plates 70 can be dispersed, but also the vibrations from the front and rear roller drive motors 63 can be dispersed. Therefore, by dispersing the gravitational load and the vibration load applied to the casing constituting the seeder 11, it is possible to suppress looseness and breakage at the connecting portion and improve durability during operation. Further, a reinforcing frame 72 is installed on the rear side of the front roller drive motor 63 and the front side of the rear roller drive motor 63 so as to bridge the left and right side plates 70, thereby improving the rigidity of the seeder 11.

  The roller drive chain 66 that connects the roller shaft 65 of the feed roller 62 and the motor shaft 67 of the roller drive motor 63 is covered with the chain cover 73 together with the feed input sprocket 68 and the feed output sprocket 69. That is, the front left side surface of the left side plate 70 together with the front (left) roller drive chain 66 around which the feed input sprocket 68 at the left end of the front roller shaft 65 and the feed output sprocket 69 at the left end of the front motor shaft 67 are wound. It is covered with a chain cover 73 before being fixed to the left (left). Similarly, the rear input shaft sprocket 68 at the right end of the rear roller shaft 65 and the output sprocket 69 at the right end of the rear motor shaft 67 are wound around the outer periphery (right) together with the roller drive chain 66 and the rear right side of the right side plate 70. After being fixed to the surface (right), it is covered with a chain cover 73.

  The seed receiving hopper 61 opens a seed receiving port upward, and receives seeds introduced from the seed tank 15 or the like from above. And the bottom part of the seed receiving hopper 61 is comprised into two forks, the seed supply port 64 is provided at two places in the front and rear, and the seed is supplied to each of the pair of front and rear feeding rollers 62 arranged below the seed receiving hopper 61. The seed receiving hopper 61 is configured such that the cross-sectional area of the planar cross section gradually decreases from the seed receiving port side (upper side) to the seed supply port 64 side (lower side).

  The seed receiving hopper 61 is located above the upper ends of the left and right side plates 70 and has a shape such that the seed receiving portion 74 extends toward the seed receiving port at the upper end, and a seed storage portion 75 inserted into a space surrounded by the left and right side plates 70. Are connected in the vertical direction. The seed storage unit 75 is connected on the upper edge side of the left and right side plates 70 and is suspended and fixed at a position above the feeding roller 62 between the left and right side plates 70. The seed reservoir 75 has a bifurcated shape with the center of the bottom convex upward, and the seed supply port 64 is opened before and after the bottom. The front and rear seed supply ports 64 are positioned above the vicinity of the uppermost portion of each of the front and rear feeding rollers 62 and have a shape for introducing seeds into a space sandwiched between the uppermost portions of the front and rear feeding rollers 62.

  The seed receiving hopper 61 is bent in a mountain shape (inverted V shape) between the outer side loading plate portion 77 in which the lower ends of the front and rear side wall plates 76 in the seed storage portion 75 are bent obliquely downward and the front and rear side wall plates 76. An inner loading plate 78 is provided. The front end of the side wall plate 76 (the front end of the outer input plate portion 77) and the front end of the inner input plate 78 are disposed apart from each other, and is located between the front end of the side wall plate 76 (the front end of the outer input plate portion 77) and the front end of the inner input plate 78. A seed supply port 64 is configured by the opening.

  The front wall plate 76 has its front end bent toward the rear lower side to constitute an outer input plate portion 77 extending downward from the front end of the inner input plate 78. Then, a front seed supply port 64 through which seeds are introduced from the vicinity of the uppermost portion of the front feeding roller 62 toward the rear is formed by an opening formed by the front end (rear end) of the outer input plate portion 77 and the front end of the inner input plate 78. Similarly, the front end of the rear wall plate 76 is bent toward the front lower side to constitute an outer input plate portion 77 extending downward from the rear end of the inner input plate 78, and the outer input plate portion 77. A front seed supply port 64 is provided at the opening between the front end (front end) and the rear end of the inner input plate 78 to supply seeds from the vicinity of the uppermost portion of the rear feed roller 62 toward the front.

  As described above, it is bent in an inverted V-shape (saddle shape) between the outer input plate portions 77 extending obliquely downward from the lower ends of the front and rear side wall plates 76 of the seed receiving hopper 61 toward the inside of the device. The inner feeding plate 78 is installed, and the front and rear seed supply ports 64 are opened toward the device inner space sandwiched between the front and rear feeding rollers 62. Further, the front / rear feeding roller 62 rotates so that its uppermost portion faces the outside of the apparatus.

  That is, the front and rear seed supply ports 64 are arranged at positions that face the vicinity of the uppermost portion of the front and rear feeding roller 62, and the rotation direction of each of the front and rear feeding rollers 62 is directed in the direction of seed introduction from the front and rear seed supply ports 64. The front and rear feeding rollers 62 are rotated in opposite directions. Therefore, not only the feeding roller 62 can easily receive seeds introduced from the seed supply port 64, but also the seed can be prevented from staying in the space between the seed receiving hopper 61 and the feeding roller 62. Therefore, the seed receiving groove 62a on the outer peripheral surface of the feeding roller 62 can not only uniformly and surely hold seeds, but also can prevent troubles in the rotating operation of the feeding roller 62 due to seed retention. Uniform sowing.

  A slidable input amount adjusting plate 79 is provided at the end of the inner input plate 78 so that the amount of seed input from the seed receiving hopper 61 to the feeding roller 62 can be adjusted. That is, an input amount adjusting plate 79 that is movable along the oblique direction of the inner input plate 78 is fixed to the front and rear ends of the inner input plate 78. By sliding the input amount adjusting plate 79 relative to the inner input plate 78 and fixing it, the amount of seeds supplied to the feeding roller 62 can be easily adjusted. Therefore, by adjusting the feeding amount from the feeding roller 62, the seeding amount by the seeder 11 can be adjusted precisely and seeded in the seedling box 17 without unevenness.

  The seeder 11 includes a seed arrangement hopper 80 that receives seeds introduced from the seed receiving hopper 61 and causes the feeding roller 62 to hold the seeds. The seed arrangement hopper 80 is installed forward and backward under the seed receiving hopper 61 so as to cover the upper portions of the pair of front and rear feeding rollers 62. The pair of front and rear seed array hoppers 80 has an upper opening portion into which the front and rear seed supply ports 64 at the bottom of the seed receiving hopper 61 are inserted, while a lower portion of the feeding roller 62 is inserted into the lower opening portion. Yes.

  The pair of front and rear seed array hoppers 80 connect a pair of front and rear outer wall plates 81 and a pair of front and rear inner wall plates 82 provided between the outer wall plates 81 by left and right side wall plates 83 fixed to the left and right side plates 70. Has been. That is, the seed arrangement hopper 80 is configured by surrounding the front and rear, left and right with an outer wall plate 81, an inner wall plate 82, and left and right side wall plates 83, and a seed supply port 64 at the bottom of the seed receiving hopper 61 is formed at the upper end opening thereof. While being inserted, a feeding roller 62 is inserted into the lower end opening thereof. Each of the front and rear feeding rollers 62 rotates in a direction in which a portion inserted into the seed receiving hopper 61 is directed from the inner wall plate 82 toward the outer wall plate 81. That is, in this embodiment, when viewed from the left side, the front feeding roller 62 rotates in the counterclockwise direction, while the rear feeding roller 62 rotates in the clockwise direction.

  The lower ends of the front and rear outer wall plates 81 are extended toward the outer peripheral surface of the front and rear feeding roller 62, and the upstream plate brush 84 is fixed. The front and rear inner side wall plates 82 are arranged side by side so as to be parallel from the upper end to the middle portion thereof, and extend toward the outer peripheral surface of the front and rear feeding roller 62 so that the lower ends thereof are separated from each other. The downstream plate brush 85 is fixed. That is, the front and rear inner plates 82 are disposed so as to form an inverted Y shape between the front and rear outer wall plates 81.

  As described above, the seed hopper 60 has a two-stage configuration in which the bottom of the seed receiving hopper 61 is inserted into the upper opening of the seed arrangement hopper 80 that covers the upper side of the feeding roller 62. In the seed receiving hopper 61, the inclination direction of the outer charging plate 77 on the lower end side of the side wall plate 76 and the inclination direction of the inner charging plate 78 intersect each other. Further, the inclination direction of the inner charging plate 78 of the seed receiving hopper 61 and the inclination direction of the seed arrangement hopper 80 below the inner wall plate 82 are substantially parallel.

  With the above configuration, in the seed hopper 60, a meandering space 86 is formed at the connecting portion between the seed receiving hopper 61 and the seed arrangement hopper 80, and the outer charging plate portion 77 and the inner charging plate 78 function as seed flow guides, The outer charging plate portion 77 and the inner side wall plate 82 function as a buffer plate. Therefore, the seeds introduced from the seed receiving hopper 61 into the seed arranging hopper 80 are diffused and dropped on the outer peripheral surface of the feeding roller 62 by passing through the meandering space 86, and the seeds are put into the seed receiving groove 62 a of the feeding roller 62. Are evenly arranged.

  The lower end of the front / rear outer wall plate 81 covering the lower portion of the seed hopper 60 extends toward the outer peripheral surface of the front / rear feeding roller 62, and the upstream side plate brush 84 protrudes to the outer peripheral surface of the front / rear feeding roller 62 at the lower end of the front / rear outer wall plate 81. Is provided. Since the upstream plate brush 84 functions as a regulating plate that regulates the amount of seed protruding from the outer peripheral surface of the feeding roller 62, the seed can be aligned in the seed receiving groove 62a of the feeding roller 62 according to the size of the seed. Therefore, the feeding amount from the feeding roller 62 can be adjusted, and the seedling box 17 can be seeded evenly.

  The seeder 11 has a seed guide 87 that is bent along the outer peripheral surface of the feeding roller 62 below the outer wall plate 81 in the seed arrangement hopper 80. The left and right ends of the seed guide 87 are connected and fixed to the left and right side plates 70, and the seeds gripped by the outer peripheral surface of the feeding roller 62 are arranged along the rotational direction of the feeding roller 62 from the lower end position of the outer wall plate 81. Then, it is guided downward and dropped onto the floor soil in the nursery box 17. The seed guide 87 is bent in such a shape that the distance from the outer peripheral surface of the feeding roller 62 increases from the upper end side (outer wall plate 81 side) toward the lower end side (seed dropping side).

  The upper end portion of the seed guide 87 is fastened and fixed to the pair of left and right side plates 70, and the lower end portion of the seed guide 87 is fastened and fixed to the elongated hole 90 provided in the pair of left and right side plates 70 with bolts 90 a. The long hole 90 is provided in an arc shape, and the inclination angle of the seed guide 87 can be changed by changing the fastening position of the bolt 90 a along the long hole 90. Accordingly, the distance between the lower end of the seed guide 87 and the outer peripheral surface of the feeding roller 62 can be changed, and the fixing position of the seed guide 87 can be changed according to the size of the seed to be gripped by the seed guide 87. Further, by changing the inclination angle of the seed guide 87 in accordance with the rotation speed of the feeding roller 62, the seed dropping direction from the seed guide 87 can be adjusted, and the seedling box 17 can be seeded optimally.

  The seeder 11 includes a seedling box guide 88 that regulates the position of the seedling box 17 passing below the seeder 11 by the seeding conveyor 9B in the left-right direction. The seedling box guide 88 is fixed to each of the left and right side plates 70 below each of the front and rear seed array hoppers 80. That is, a pair of left and right seedling box guides 88 in the form of leaf springs are disposed below the front and rear feeding roller 62, and by holding the seedling box 17 passing below the front and rear feeding roller 62 from the left and right, the seedling box 17 The left and right positions are fixed and conveyed on the seeding conveyor 9B.

  In the seedling box guide 88, the upstream side in the transport direction of the seedling box 17 is fixed to the side plate 70, and the upstream side in the transport direction protrudes toward the left and right center of the sowing conveyor 9B. That is, the pair of right and left seedling box guides 88 are arranged so as to narrow the distance from the upstream side toward the downstream side in the conveying direction of the seedling box 17. Therefore, the seeder 11 can transport the seedling box 17 below the front and rear feeding rollers 62 with the left and right positions of the seedling box 17 being constant, and suppress the introduction of seeds outside the seedling box 17. Can be seeded without waste.

  As shown in FIG. 15, the feeding roller 62 has a twisted shape in which a plurality of seed receiving grooves 62a are inclined in a direction crossing the axial direction. That is, the seed receiving groove 62a is configured to be inclined with respect to the longitudinal directions of the plate brushes 84 and 85, respectively. Accordingly, the single seed receiving groove 62a partially overlaps the plate brushes 84 and 85, respectively. Therefore, when the convex part 62b between the seed receiving grooves 62a and the plate brushes 84 and 85 abut, seeds stored in the vicinity of the upstream plate brush 84 or the downstream plate brush can be efficiently fitted into the seed receiving grooves 62a. In addition, seeds can be efficiently arranged in one seed receiving groove 62a.

  In addition, the groove width and the groove depth of the seed receiving groove 62a are set according to the size of the seed. Then, by making it possible to replace the feeding roller 62 having different groove widths W and groove depths D of the seed receiving grooves 62a, for example, edible rice, feed rice, long grain rice, etc. Sowing becomes possible. Furthermore, in the seeding machine 11 for edible rice, by fixing the feeding roller 62 provided with the seed receiving groove 62a having a wide groove width, the amount of seeds (seeds) held in the seed receiving groove 62a is increased, so that the seedlings are raised. The seeding density for the box 17 is high. Therefore, by providing the sowing machine 11 with the feeding roller 62 having the seed receiving groove 62a having a wide groove width, it is possible not only to respond to the sowing of feed rice but also to the sowing of food rice by the dense seedling method.

  As shown in FIG. 16, the rear feed roller 62 on the upstream side in the conveying direction of the seedling box 17 rotates clockwise in a left side view, thereby dropping seeds in the same direction as the conveying direction of the seedling box 17. On the other hand, the pre-feeding roller 62 on the upstream side in the conveying direction of the seedling box 17 rotates counterclockwise in the left side view, thereby dropping seeds in the direction opposite to the conveying direction of the seedling box 17. Thereby, the seed dropped from the rear feeding roller 62 is reliably sown from the front corner of the seedling raising box 17, while the seed dropped from the front feeding roller 62 is reliably sown to the rear corner of the seedling raising box 17. The Therefore, by rotating the front and rear feeding roller 62 in the opposite direction, seeds can be reliably sown in the front and rear corners of the seedling box 17, and seeding can be accurately and uniformly sown in the seedling box 17. In addition, since the seeds dropped from the pair of front and rear feeding rollers 62 are dropped toward the inside of the seeder 11, the seeds are dropped into the seedling box 17 without being dropped outside the seeder 11. The opening area of the recovery hopper for recovering the seed that has leaked without leakage can be reduced.

5. Next, rotation speed control of the pair of front and rear feeding rollers 62 in the seeder 11 will be described below with reference to FIG. As described above, the front / rear feeding roller 62 rotates in response to the rotational power of the front / rear roller drive motor 63. The front / rear roller drive motor 63 is configured to be communicable with the controller 36. By receiving a control signal from the controller 36, the power ON / OFF and the rotation speed are controlled. The controller 36 is also configured to be communicable with the transport drive motor 37, and controls the ON / OFF operation and rotation speed of the transport drive motor 37 by transmitting a control signal to the transport drive motor 37. . Furthermore, the controller 36 can detect that the seedling box 17 has been conveyed to the lower side of the seeder 11 by receiving a signal from the seedling box detection sensor 89 provided immediately below the seeder 11 in the seeding conveyor 9B.

  As shown in the flowchart of FIG. 17, the controller 36 turns on the transport drive motor 37 and transports so that the transport speed of the seedling box 17 by the sowing transport conveyor 9 (seeding conveyor 9B) becomes the set speed. The rotational speed of the drive motor 37 is controlled (STEP 1). The controller 36 sets the rotation speed R1 of the roller drive motor 63 based on the seeding amount to the seedling box 17 input by the operator and the conveyance speed of the seedling box 17 set in STEP1 (STEP2). Further, the controller 36 sets a time T <b> 1 from when the seedling box 17 is carried into the seeder 11 until reaching the lower side of the front feeding roller 62 based on the conveyance speed of the seedling box 17 set at STEP 1 ( (Step 3).

  After that, when the controller 36 detects that the seedling box 17 is carried toward the seeder 11 based on the detection signal from the seedling box detection sensor 89 (YES in STEP 4), first, the upstream of the seedling box 17 conveyance direction. The rear roller driving motor 63 for rotating the rear feeding roller 62 positioned on the side is driven (STEP 5). That is, the first leading edge of the seedling box 17 tries to pass the lower side of the rear feeding roller 62 located on the upstream side in the conveying direction of the seedling box 17, and the rear feeding roller 62 is rotated at the same time. At this time, the rear roller drive motor 63 is rotationally driven at a rotational speed R1 + ΔR accelerated by ΔR with respect to the rotational speed R1 set in STEP2.

  When the controller 36 confirms that the time T1 has elapsed since the seedling box 17 was loaded toward the seeding machine 11 (YES in STEP 6), the seedling box 17 reaches the lower side of the forward feeding roller 62. The front roller driving motor 63 that rotates the front feeding roller 62 is driven (STEP 7). That is, the leading edge of the first seedling box 17 tries to pass the lower side of the front feeding roller 62 located on the downstream side in the conveying direction of the seedling box 17 and at the same time, the front feeding roller 62 is rotated. At this time, the front roller drive motor 63 is rotationally driven at a rotational speed R1-ΔR that is decelerated by ΔR with respect to the rotational speed R1 set in STEP2.

  Thereafter, the controller 36 confirms that the rear edge of the last seedling box 17 has passed under the rear feeding roller 62 located on the upstream side in the conveying direction of the seedling box 17 based on the detection signal from the seedling box detection sensor 89 ( (Yes in STEP 8), the rear roller driving motor 63 is turned off, and the rotation of the rear feeding roller 62 is stopped (STEP 9). Further, when it is confirmed that the time T1 has elapsed since the last nursery box 17 passed under the rear feeding roller 62 (YES in STEP 10), it is recognized that the last nursery box 17 is carried out from the seeder 11. Then, the front roller drive motor 63 is turned off, and the rotation of the front feed roller 62 is stopped (STEP 11).

  As described above, the seeder 11 is formed with the seed hopper 60 under the two sides, the two seed supply ports 64 are provided at the front and the back, and the front and rear feeding rollers whose rotations are opposite to each other below the various child hoppers. 62 is arranged. The front / rear feeding roller 62 is independently rotated by two roller drive motors 63, and the rotational speed of the front / rear feeding roller 62 is individually set according to the conveyance speed of the seedling box 17 and the seeding amount.

  Since the sowing direction from the front / rear feeding roller 62 is different from the conveying direction of the seedling box 17, the seeding shortage at the front and rear corners of the seedling box 17 can be solved. Further, by changing the rotation speed of the front / rear feeding roller 62, the moving speed of the seedling box 17 can be set in accordance with the work speed of the operator. Furthermore, by individually controlling the rotational speeds of the front and rear feeding rollers 62, the seeding amount in the seedling box 17 can be adjusted with high accuracy.

  Further, the seeder 11 has the front / rear feeding roller 62 having the same diameter, and sets the rotational speed of the rear feeding roller 62 faster than the rotational speed of the front feeding roller 62. That is, the rotational speed of the post-feed roller 62 that drops seeds in the same direction as the feeding direction of the seedling box 17 is faster than the rotational speed of the pre-feed roller 62 that drops seeds in the direction opposite to the transport direction of the seedling box 17. Accordingly, since the relative speed of the seeds dropped from the front and rear feeding rollers 62 with respect to the seedling raising box 17 can be made closer, seeds can be seeded in the seedling raising box 17 with high accuracy and uniformity. Moreover, since the feeding amount of seeds from the seed hopper 60 to each of the front and rear feeding rollers 62 can be made equal by setting the feeding roller 62 to the same diameter, the seed stays in one seed supply port 64 in the seed hopper 60. Can be prevented.

  In addition, when the first seedling box 17 is carried in, the sowing machine 11 starts the rotation drive of the upstream rear feed roller 62 and starts the seed feeding by the rear feed roller 62. Thereafter, when the first seedling box 17 reaches a position where seeds can be put from the downstream front feed roller 62, the front feed roller 62 starts to rotate, and seeds are fed by the front and rear feed rollers 62. . Thereby, when the first seedling box 17 is carried in, the seeder 11 drives the front feeding roller 62 after driving the rear feeding roller 62 so that the seedling box 17 is not directly under the front feeding roller 62. Not only can the wasteful sowing operation by the forward feeding roller 62 be prohibited, but also power saving can be achieved.

  Furthermore, when the last seedling box 17 is carried in, the seeder 11 rotates the rear feeding roller 62 when the seedling box 17 passes through the position where the seeds can be introduced from the upstream rear feeding roller 62. Then, the seed feeding by the post-feeding roller 62 is stopped. Thereafter, when the last seedling box 17 passes through the position where seeds can be introduced from the downstream front feed roller 62, the rotation drive of the front feed roller 62 is stopped and the seed feed by the front and rear feed rollers 62 is stopped. . Thereby, when the last seedling box 17 is carried in, the seeding machine 11 stops the front feeding roller 62 after stopping the rear feeding roller 62, so that the seedling box 17 is not directly under the rear feeding roller 62. Not only can the wasteful sowing operation by the post-feed roller 62 be prohibited, but also power saving can be achieved.

  The parameter setting operation based on the sowing amount in the sowing apparatus 8 of the present invention will be described below. The seeding device 8 of the present embodiment includes a seeder 11 that drives the pair of front and rear feeding rollers 62 as described above with a pair of front and rear roller driving motors 63, and a single feeding roller 62 as shown in FIGS. Is replaced with a seeder 11X that is driven by a single roller drive motor 63. In the seeding device 8, the controller 36 confirms the number of roller drive motors 63 to be controlled by electrical connection with the roller drive motor 63, and the seeders installed in the seeding unit 8B are the seeder 11 and the seeder. 11X is determined.

  As shown in the flowchart of FIG. 21, the controller 36 receives a signal from the roller drive motor 63 (STEP 101), and determines whether or not the number of connected roller drive motors 63 is single (STEP 102). When the roller driving motor 63 is single (YES in STEP 102), it is determined that the seeding machine 11X including the single feeding roller 62 is installed, and the roller rotation speed of the feeding roller 62 is constant at Rx. The parameters are set as follows (STEP 103).

  Thereafter, the sowing amount of the seedling box 17 is confirmed by an input from the operator, and when sowing in the dense seedling method with a large sowing amount is designated (Yes in STEP 104), the transport speed of the sowing conveyor 9 is slow. A parameter is set to the conveyance speed Vx (STEP 105). On the other hand, when sowing in the conventional method with a small seeding amount is designated (NO in STEP 103), the transport speed of the sowing transport conveyor 9 is set to a fast transport speed Vy (Vy> Vx) (STEP 106).

  If there are two roller drive motors 63 (No in STEP 102), it is determined that the seeding machine 11 having a pair of front and rear feeding rollers 62 is installed, and the transport speed of the seeding transport conveyor 9 is determined as the transport speed. Parameters are set so as to be constant at Vz (STEP 107). Thereafter, the sowing amount of the seedling box 17 is confirmed by an input from the operator, and when sowing in the dense seedling method with a large sowing amount is designated (YES in STEP 108), the roller rotation speed R1 of the feeding roller 62 is increased. A parameter is set to the roller rotation speed Ry (STEP 109). On the other hand, when the sowing in the conventional method with a small seeding amount is designated (No in STEP108), the roller rotational speed R1 of the feeding roller 62 is set to a slow roller rotational speed Rz (Rz <Ry) (STEP110). .

  As described above, the seeding device 8 includes the first seeding machine 11 that drives the pair of front and rear feeding rollers 62 by the pair of front and rear roller driving motors 63, and the second that drives the single feeding roller by a single driving device. A seeding machine 11X is alternatively selected and installed. And the sowing apparatus 8 is a controller 36 for controlling the sowing conveyor (conveyor) 9 for transporting the seedling box 17 to be sowed, the first sowing machine 11 or the second sowing machine 11X, and the sowing conveyor 9. With.

When the first seeder 11 is installed on the sowing transport conveyor 9, the controller 36 keeps the transport speed of the sowing transport conveyor 9 constant and changes the rotation speed of the feeding roller 62 according to the sowing amount. When the second seeder 11X is installed on the sowing conveyor 9, the rotation speed of the feeding roller 62 is kept constant, and the transport speed of the sowing conveyor 9 is changed according to the sowing amount. Depending on the number of the feeding rollers 62 of the seeding machines 11 and 11X, either the conveying speed of the sowing conveyor 9 or the rotational speed of the feeding roller 62 can be set to be constant. In addition to being able to sow, the load on the roller drive motor (drive device) 63 of the sowing machines 11 and 11X can be suppressed, and failure and breakage of the sowing machines 11 and 11X can be prevented in advance. The configuration of each part in the invention is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the invention of the present application.

8 sowing device 8A floor soil unit 8B sowing unit 8C soil covering unit 9 sowing conveyor 9A floor soil conveyor 9B seeding conveyor 9C soil covering conveyor 9D relay conveyor 10 earthing machine (floor soil supply device)
11 Sowing machine (seed supply device)
12 Soil cover machine (soil cover supply device)
36 Controller 37 Carrying drive motor 38 Seed dropping machine 60 Seed hopper 61 Seed receiving hopper 62 Feeding roller 62a Seed receiving groove 62b Protruding part 63 Roller driving motor 64 Seed supply port 65 Roller shaft 66 Roller driving chain 67 Motor shaft 68 Feeding input sprocket 69 Feeding output sprocket 70 Side plate 71 Bearing 72 Reinforcement frame 73 Chain cover 74 Seed receiving portion 75 Seed storage portion 76 Side wall plate 77 Outer input plate portion 78 Inner input plate 79 Input amount adjustment plate 80 Seed arrangement hopper 81 Outer side wall plate (front and rear)
82 Inner side wall plate 83 Side wall plate (left and right)
84 Upstream plate brush 85 Downstream plate brush 86 Meander space 87 Seed guide 88 Nursery box guide

Claims (5)

A seed hopper comprising a seed hopper having an upper surface that receives seeds and a feeding roller that receives seeds from the seed hopper and drops them into a seedling box,
The feeding rollers are arranged in a pair of front and rear along the conveying direction, and the pair of front and rear feeding rollers are each driven to rotate independently by two roller drive motors,
When the first seedling box reaches under the rear feed roller on the upstream side in the transport direction, only the rear feed roller is driven to rotate, and the first seedling box reaches under the front feed roller on the downstream side in the transport direction. The seeding machine is characterized in that the front feeding roller is rotationally driven together with the rear feeding roller.   When the last seedling box passes under the rear feed roller, only the rear feed roller stops rotating, and when the last seedling box passes under the front feed roller, the rear feed roller The seeding machine according to claim 1, wherein the forward feeding roller stops rotating.   The seeding machine according to claim 1 or 2, wherein the pair of front and rear feeding rollers are configured by rollers having the same diameter, and the pair of front and rear feeding rollers are opposite to each other.   The direction in which the seedling is dropped from the front feeding roller is opposite to the direction in which the seedling box is conveyed, while the direction in which the seedling is dropped from the rear feeding roller is the same as the direction in which the seedling box is conveyed, The seeding machine according to claim 3, wherein the rotation speed is slower than the rotation speed of the post-feeding roller. A first seeder configured by the seeder according to any one of claims 1 to 4 and a second seeder that drives a single feeding roller with a single driving device are alternatively selected. A seeding device that is installed and includes a transport device that transports a seedling box to be seeded, and a controller that controls the first seeder or the second seeder and the transport device;
The controller is
When the first seeder is installed in the transport device, while making the transport speed of the transport device constant, while changing the rotation speed of the feeding roller according to the seeding amount,
When the second seeder is installed in the transfer device, the rotation speed of the feeding roller is made constant, and the transfer speed of the transfer device is changed according to the seeding amount.

Images