JP2020103216A - Seedling transplanter - Google Patents

Abstract

To provide a seedling transplanter capable of improving planting accuracy of seedlings by leveling a ridge surface properly, and reducing the number of components.SOLUTION: There is provided a seedling transplanter comprising: a travel vehicle 1 with a cockpit 20 for traveling; and a seedling transplanting unit 3 which is provided on a rear part of the travel vehicle 1 for transplanting seedlings to a field. The seedling transplanting unit 3 has a suppression part A which is configured so that a height position can be vertically changed by extension/contraction of a hydraulic cylinder of a lifting link unit 2 and can rotate vertically in a prescribed range regardless of extension/contraction of the hydraulic cylinder of the lifting link unit 2, and can suppress a ridge surface by a grounding roller 33 contacting the ridge surface. The suppression part A can adjust a vertical height position of the grounding roller 33. According to the seedling transplanter, the ridge surface can be levelled properly and planting accuracy of seedlings can be improved, and the number of components can be reduced.SELECTED DRAWING: Figure 1

Description

The present invention relates to a riding-type seedling transplanter for planting seedlings in a field.

Conventionally, this type of transplanter has a seedling table on the rear of the traveling vehicle equipped with a cockpit, on which a seedling tray containing seedlings can be loaded, and a seedling taken out from the seedling table to the rear of the traveling vehicle. It is equipped with a seedling removing device that supplies the seedling transplanting device that is arranged, and the seedling transplanting device is equipped with a bird's beak-shaped seedling planting body that can be moved up and down. It is configured to plant seedlings in the field by repeating the operation of plunging into the ridge surface and opening the seedling planting body, and leaving the seedlings in the plunging hole to close while rising. This seedling transplanting device has a grounding roller for detecting the unevenness of the ridges and changing the working height of the seedling transplanting device, and a compression wheel for attracting and solidifying the soil around the planted seedlings. (For example, see Patent Document 1).

JP, 2006-272125, A

However, in the transplanter described in Patent Document 1, the ground roller detects unevenness of the ridge surface and functions as a sensor for changing the working height of the seedling transplanting device. It was constructed so that it could be easily rotated up and down by being driven, and the crushing effect on the ridge surface was extremely limited. As a result, there is a problem that the ridges are not leveled properly, which causes the planting depth of the seedlings to be different on the left and right, and the planting accuracy is reduced. Further, it is necessary to provide a member for urging the grounding roller to ground it, resulting in an increase in the number of parts.

Therefore, an object of the present invention is to provide a transplanter capable of appropriately leveling the ridges to improve the planting accuracy of seedlings and reducing the number of parts.

The invention according to claim 1 is a seedling transplanter comprising a traveling vehicle equipped with a cockpit and capable of traveling, and a seedling transplanting device arranged at the rear of the traveling vehicle and capable of transplanting seedlings into a field. The seedling transplanting device is provided so that the height position can be changed up and down by expanding and contracting the hydraulic cylinder of the lifting link device, and is vertically rotatable within a predetermined range without depending on the expansion and contraction of the hydraulic cylinder of the lifting link device. In addition, it is characterized in that it is provided with a pressure-reducing portion whose pressure can be reduced by a grounding roller that is grounded on the ridged surface, wherein the pressure-reducing portion is provided so that the vertical position of the grounding roller can be adjusted.

The invention according to claim 2 is the invention according to claim 1, wherein the seedling transplanting device comprises a seedling planting part for planting seedlings in a field, and a seedling supplying part for supplying seedlings to the seedling planting part, The seedling planting unit comprises a plurality of seedling planters for vertically planting seedlings in the field, and the seedling supplying unit is configured to stack seedling trays containing the seedlings and transport the seedlings in a predetermined direction. A table and a seedling take-out device for taking out the seedlings from the seedling tray loaded on the seedling placing table are provided, and the seedling planting section receives the seedlings supplied from the seedling taking-out device, and moves it around by a moving mechanism. It is configured to supply to the plurality of seedling planting bodies, the compression section comprises a planting transmission case for transmitting to the seedling feeding section and the seedling planting section, the planting transmission case, in the upper part. It is configured to support the seedling supply unit, and the ground roller is disposed in the lower portion, and the left and right widths related to the arrangement of the ground roller are the left and right arrangements related to the arrangement of the plurality of seedling plantings. It is characterized in that it is provided so as to have a width or more.

The invention according to claim 3 is the invention according to claim 2, wherein the seedling planting section includes a seedling supply table for orbitally moving the seedlings by the moving mechanism, and the seedling removing device is provided above the planting transmission case. And the seedling supply table is arranged, the seedling extraction device is configured to take out the seedlings over the transport region of the seedling supply table, the plurality of seedling plant, respectively, the planting position It is characterized by being configured to be adjustable in the left-right direction.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, further comprising a rotation sensor for detecting a rotation speed of the ground roller, and before and after planting of the plurality of seedling planting bodies. A seedling characterized by comprising a planting transmission control mechanism capable of changing the spacing, wherein the planting transmission control mechanism is configured to change the planting front-rear spacing in accordance with the number of rotations detected by the rotation sensor. Transplanter.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the crushing section includes a crushing wheel that compacts the soil around the planted seedlings, and the crushing wheel is The compression wheel mounting frame is attached to the rear end of the compression wheel mounting frame extending rearward of the machine body, and the compression wheel mounting frame is rotated by an electromagnetically controllable compression wheel mounting frame so that the vertical height can be adjusted. Further, a compression angle sensor capable of detecting the vertical position of the compression wheel is provided at a front end portion of the compression wheel mounting frame, and the compression wheel is arranged in accordance with the vertical position of the compression wheel detected by the compression angle sensor. When it is determined that the compression wheel is not grounded, the compression wheel lifting/lowering cylinder is operated to move the compression wheel downward and ground it.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a ridge end detection sensor for detecting a ridge end arranged at a front portion of the traveling vehicle, and the traveling vehicle A distance sensor for detecting the movement distance of the, and an informing device capable of informing the worker, the ridge edge detection sensor is configured to notify the worker when the ridge edge detection sensor is in a detection state, further, the ridge edge After the detection sensor enters the detection state, the traveling vehicle continues traveling, and when the distance sensor detects the front-rear distance from the front portion of the traveling vehicle to the ground contact roller as the moving distance, the traveling vehicle Is configured to stop the traveling of the vehicle.

The invention according to claim 7 is the invention according to claim 2 or 3, wherein the seedling mounting table comprises a seedling tray recovery table that is connected to a rear portion of the seedling mounting table, which is the lower transfer side of the seedling tray. The seedling tray collection table is configured to be a transporting end point of the seedling tray, and the seedling tray collection table is arranged on the traveling vehicle side so that a front end portion of the seedling tray collection table faces an upper portion of the traveling vehicle. And

According to the invention of claim 1, when the ground roller passes through the unevenness of the ridge surface, the seedling transplanting device is vertically rotated, so that the planting depth can be changed according to the hardness and softness of the ridge. In addition, a device for detecting the amount of change in the height of the ridge and a dedicated hydraulic control are not required, which simplifies the configuration. Furthermore, since the seedling transplanting device is configured to rotate up and down within a predetermined range without depending on the expansion and contraction of the hydraulic cylinder of the lifting link device, the grounding roller rotates up and down when passing through the unevenness of the ridge, It is possible to evenly suppress the ridge surface under the load of the seedling transplanting device. As a result, the ridges are appropriately leveled to improve the planting accuracy of the seedlings, and it is not necessary to separately provide a member for urging the grounding roller to suppress the pressure, thereby reducing the number of parts.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the transmission case functions as a support frame of the seedling planting part by planting, and the number of parts can be reduced and the grounding can be achieved. The roller makes it easy to apply a load to the ridge surface, and the ridge surface is properly leveled to improve the planting accuracy. In addition, by arranging the ground roller with a certain width in the left-right direction, it is possible to prevent the seedling transplanting device from tilting in the left-right direction due to its own weight, and to suppress variations in the planting depth of the seedlings. The running can be stabilized.

According to the invention of claim 3, the seedling take-out device B2 is arranged so as to take out the seedlings from the seedling placing table B1 across the upper part of the front part of the seedling feeding table 72 for conveying the seedlings. The vertical gap between B2 and the seedling supply table 72 can be narrowed, and the vertical height of the machine becomes compact.

According to the invention according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the change in the movement distance due to slip or the like is judged from the rotation speed of the grounding roller to determine the movement distance. It is possible to change the planting speed of the seedling plant in accordance with the change of the seedlings, and as a result, it is possible to keep the spacing between the seedlings constant and improve the accuracy of harvesting work and the quality of the crop.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, when the seedling transplanter determines that the packing wheel is not grounded, the packing wheel lifting cylinder. By turning on the squeeze wheel, the squeeze wheel is rotated downward to contact with the ground, so that the squeeze wheel is prevented from rising from the ridge surface, and the roots of the seedlings are planted in the soil by leveling the soil lifted during transplanting the seedlings. As a result, the posture of planting seedlings becomes stable. Further, unlike the conventional case, a biasing member such as a spring for pressing the compression wheel downward is not required, so that the number of parts can be reduced and the cost can be reduced.

According to the invention of claim 6, in addition to the effect of the invention of any one of claims 1 to 5, when the traveling vehicle 1 continues traveling after the ridge edge detection sensor detects the ridge edge. , Traveling stops at the position where the ground roller reaches just before the ridge. As a result, the seedlings are surely planted from the top of the ridge to a position where the ridge can be planted near the ridge, and excessive traveling is prevented, so that work efficiency is improved.

According to the invention of claim 7, in addition to the effect of the invention of claim 2 or 3, the worker can easily collect the empty seedling tray from the traveling vehicle side. Since the seedling tray can be collected when getting off from the traveling vehicle, work efficiency is improved.

1 is an overall side view showing a seedling transplanter that is an embodiment of the present invention. It is the whole seedling transplanter top view shown in FIG. FIG. 3 is an enlarged side view of the seedling transplantation device of FIG. FIG. 4 is a perspective view of the seedling stand of FIG. FIG. 5 is a side sectional view of the seedling mounting table of FIG. FIG. 6 is a side view of the seedling extraction device of FIG. 7: is a side view which shows the state which is transporting the seedling by the seedling extraction nail of the seedling extraction apparatus of FIG. FIG. 8 is a block diagram showing a control system, a detection system and a drive system of the seedling transplanter. FIG. 9 is a vertical cross-sectional view of a stopper valve that controls the water flow of the irrigation system of FIG. 1. FIG. 10 is a sectional view taken along the line AA of FIG. It is the whole seedling transplanter top view which concerns on another embodiment.

A seedling transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings.
It should be noted that in the following description, “forward and backward” and “left and right” are referred to with reference to the forward direction of the machine body.

FIG. 1 is an overall side view showing a seedling transplanter which is an embodiment of the present invention. FIG. 2 is an overall plan view of the seedling transplanter shown in FIG. As shown in FIG. 1, the seedling transplanter is configured by mounting a seedling transplanter 3 on a traveling vehicle 1 with a lifting link device 2. The traveling vehicle 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6 and 6 and rear wheels 7 and 7, which is a drive train.

A mission case 11 and an engine 12 are arranged on the main frame 10 in the front-rear direction, and a steering post 14 is projected upward from a front portion of the mission case 11. Further, a ridge end detection sensor 18 for detecting the ridge end is arranged at the front part of the traveling vehicle 1. The ridge detection sensor 18 may be a contact type such as a plate or a non-contact type such as an ultrasonic wave. In the present embodiment, the non-contact type is used.

A steering handle 16 and an operation panel 17 are provided on the upper end of the steering post 14. A step 19 which is a floor for operation is attached to the upper part of the machine body, and a cockpit 20 is installed above the engine 12. The front wheels 6, 6 are pivotally supported by front wheel support cases 22, 22 which are provided on the left and right sides of the mission case 11 so that the directions thereof can be changed. The rear wheels 7, 7 are pivotally supported by the rear wheel support cases 24, 24.

Rotational power of the engine 12 is transmitted to an input shaft (not shown) of the hydraulic transmission HST, transmitted from the output shaft of the hydraulic transmission HST to a mission case 11 via a belt, and further, the mission case 11 Is transmitted to the front wheels 6, 6 and the rear wheels 7, 7 from which the traveling vehicle 1 can travel. The power transmitted to the mission case 11 is also branched and transmitted to the PTO transmission shaft 26 having an output shaft at the rear of the traveling vehicle 1.

The PTO transmission shaft 26 has universal joints at both ends and is connected to the seedling transplanting device 3, and transmits power to the seedling transplanting device 3.

The elevating and lowering link device 2 is mounted such that the front ends of the upper link 27 and the lower link 28 are vertically rotatably attached to an upwardly extending link support frame 29 fixed to the rear end of the traveling vehicle 1, and the rear ends are transplanted to seedlings. The seedling transplanting device 3 is connected to the device 3, and the vertical height can be adjusted by expanding and contracting the hydraulic cylinder of the elevating link device 2. The seedling transplanting device 3 is configured to rotate up and down within a predetermined range without depending on the expansion and contraction of the hydraulic cylinder of the lifting link device 2. Further, the seedling transplanting device 3 is arranged in a horizontal posture with respect to the traveling vehicle 1 and does not have a rolling mechanism, so that even if the ridge is slightly inclined in the left-right direction, it will be described later. The seedlings can be planted by flattening them with the grounding roller 33 to improve planting accuracy.

(Seedling transplantation device)
The seedling transplanting device 3 includes a crushing section A for suppressing the ridges, a seedling supplying section B for supplying seedlings to the seedling planting section C, and a seedling planting section C for planting seedlings.

FIG. 3 is an enlarged side view of the seedling transplanting device 3 of FIG.
The compression section A is connected to the PTO transmission shaft 26 to receive power transmission, and transmits a power to the seedling planting section B and the seedling supply section C, and a lower portion of the planting transmission case 31. It is provided with a mounting plate 32 integrally provided and a grounding roller 33 which is a grounding rotating member mounted on the mounting plate so that the vertical position can be adjusted.

The planting transmission case 31 is arranged so as to support the seedling supply part B across the left and right of the seedling planting part B, and is arranged below the seedling supply part B to function as a support frame. As a result, it is not necessary to separately provide a support frame for the seedling supply section B, so that the number of parts can be reduced. Further, since the grounding roller 33 is disposed below the planting transmission case 31, it is easy for the grounding roller 33 to apply a load to the ridge surface, which allows the ridge surface to be properly leveled and the planting accuracy to be improved. improves.

The attachment plate 32 is attached to a lower portion of the planted transmission case 31, and a compression wheel 35 is attached to the attachment plate 32 via a compression wheel attachment frame 34 so as to protrude rearward of the machine body. The compression wheel 35 is provided so that it can be moved up and down by an electromagnetically controllable compression wheel lifting cylinder 36 to adjust the vertical height.

Further, the mounting plate 32 is provided with a potentiometer 37 which is a compression angle sensor capable of detecting the vertical position of the compression wheel 35 by detecting the angle of the compression wheel mounting frame 34. It is possible to determine whether or not the grounding roller 33 is grounded at the same height, and as a result, it is possible to determine whether or not the compression wheel 35 is grounded.

Further, the compression wheel mounting frame 34 is provided with a compression wheel lifting cylinder 36, and the compression wheel mounting frame 34 is rotated by the control of the compression wheel lifting cylinder 36 to change the angle. It is possible to rotate up and down to adjust the vertical position.

With such a configuration, when the seedling transplanter determines that the compression wheel 35 is not grounded, it activates the compression wheel elevating cylinder 36 to rotate the compression wheel 35 downward and ground it. There is. As a result, the presser wheel 35 is prevented from rising from the ridge, and the soil lifted at the time of transplanting the seedlings can be leveled and the roots of the seedlings can be planted in the soil, so that the seedling planting posture is stable. Further, unlike the conventional case, a biasing member such as a spring for pressing down the compression wheel 35 downward is not required, so that the number of parts and the cost can be reduced.

On the lower part of the mounting plate 32, a grounding roller 33 having a vertical position adjusting mechanism (not shown) that can change the mounting position vertically with respect to the mounting plate 32 is mounted. The ground roller 33 is composed of a single roller member having a left-right direction as a longitudinal direction and a predetermined left-right width W1, and is rotatably supported by a mounting plate 32. Thereby, the ground roller 33 stably supports the seedling transplanting device 3. Further, the ground roller 33 is provided with a rotation sensor 38 for detecting the number of rotations of the ground roller 33. Since the grounding roller 33 is provided with a vertical position adjusting mechanism, it is possible to easily change the planting depth without requiring fine adjustment by operating the elevating link.

The grounding roller 33 provided in this way is configured so that the seedling transplanting device 3 can be vertically rotated within a predetermined range without depending on the expansion and contraction of the hydraulic cylinder of the elevating link device 2. It is possible to rotate up and down when passing through the unevenness, and receive the load of the seedling transplanting device 3 to uniformly suppress the ridge surface. As a result, the ridges are properly leveled to improve the planting accuracy of the seedlings, and it is not necessary to separately provide a member for urging the grounding roller 33 for suppressing the pressure, and the number of parts can be reduced. In this way, the height of the seedling transplanting device 3 is rotated up and down within a predetermined range in accordance with the ridge surface without the need to operate the grounding roller 33 as a sensor to vertically move the seedling transplanting device 3 as in the conventional case. Since it can be changed, planting accuracy can be improved and workability is also improved.

Further, according to this configuration, even when a plurality of rows of seedlings are planted, the planting depth of each row can be easily made uniform. Further, since it is not necessary to support the seedling transplanting device 3 only by the lifting link device 2, the load is dispersed and the durability is improved. In addition, when the ground roller 33 passes through the unevenness of the ridge surface, the seedling transplanting device 3 is vertically rotated, so that the planting depth can be changed according to the hardness and softness of the ridge. In addition, a device for detecting the amount of change in the height of the ridge and a dedicated hydraulic control are not required, which simplifies the component structure.

Further, the ground roller 33 is arranged in the lower part of the planting transmission case 31, and the left and right width W1 of the ground roller 33 is equal to or more than the left and right arrangement width W2 related to the arrangement of the seedling plant 71 of the seedling transplanting device 3. It is provided so that. That is, the left and right end portions of the ground roller 33 have the same width as the left and right end portions of the plurality of seedling planting bodies 71 arranged, or are stretched outside the body more than the left and right end portions of the plurality of seedling planting bodies 71. It is configured to serve. As a result, the grounding roller 33 is arranged to secure a predetermined width in the left-right direction, and the seedling transplanting device 3 can be favorably prevented from tilting in the left-right direction due to its own weight, while suppressing variations in the planting depth of the seedlings. The running of the transplanter can be stabilized.

(Seedling supply device)
As shown in FIG. 4, the seedling supply device B includes a seedling mounting table B1 having a lateral movement mechanism that can move laterally along the guide rail 22, and a seedling extracting device for taking out seedlings from the seedling mounting table 23. It is equipped with B2. The seedling mounting table B1 is configured to receive a transmission from the planted transmission case 31 arranged below and start moving from either the left or right end of the seedling supply device B. The seedling mounting table B1 and the seedling take-out device B2 are arranged in the left and right central portions of the machine body, so that it is not necessary to bias the seedling planting section C, which will be described later, in the machine body left-right direction, and the running balance during planting work can be improved. Stable and less likely to cause lateral displacement of the planting position.

The seedling tray 40 placed on the seedling placing table 43 is formed by vertically and horizontally connecting a plurality of seedling raising pots 41... And is made of plastic and has flexibility. The seedling raising pots 41 are connected on the front surface side, and the back surface is independent.

The seedling placing table 43 has a bottom plate 44 which is inclined downward to support the bottom portion of the seedling tray 40 over the horizontal row of seedling raising pots 41. When the seedling tray 40 is inserted from above the seedling placing table 43 so as to be sandwiched between the bottom plate 44 and the pressing frame 45, the engaging pin of the transport chain 46 is engaged with the groove portion of the seedling tray 40. When the transport chain 46 is rotationally driven by, the seedling tray 40 is vertically fed obliquely downward along the bottom plate 44. Further, the seedling tray 40 vertically fed by the seedling tray 40 is discharged onto the seedling tray collecting stand 64 which is connected to the rear portion of the seedling placing stand 43, which is the lower transfer side of the seedling tray 40, and the seedling tray collecting stand 64. Is configured to be the end point of conveyance of the seedling tray 40. The seedling tray collecting base 64 is arranged on the traveling vehicle 1 side so that the front end of the seedling tray collecting platform 64 faces the upper portion of the traveling vehicle 1, whereby the operator can empty the seedling tray from the traveling vehicle 1 side. The tray 40 can be easily collected, and the seedling tray 40 can be collected, for example, when getting off the traveling vehicle 1, so that the work efficiency is improved.

FIG. 5 shows a side view of the seedling take-out device B of this embodiment.
In the seedling take-out device B, a pair of left and right seedling take-out claws 48 are fitted and attached to a seedling claw base block 51 fixed to a seedling claw base plate 50. The seedling nail base plate 50 is rotatably supported by the nail support shaft 52. The seedling nail base plate 50 is connected to a rotary power mechanism that reciprocates the nail support shaft 52 via a rotating arm 56.

A through hole is formed in the seedling nail block 51, and a nail guide 49 is slidably inserted and supported in the through hole.

A swing arm 54 is swingably supported by the seedling stand base plate 50 via a support shaft 53. The tip of the swing arm 54 is connected to the rear end of the claw guide 49 via a link member 55. A cam follower 57 is provided in the middle of the swing arm 54.
The cam follower 57 is in contact with the outer peripheral surface of the cam body 61 attached to the pawl support shaft 52.

A coil spring 58 that urges the swing arm 54 in a direction toward the nail support shaft 52 is provided between the seedling table base plate 50 and the swing arm 54.

By the relative rotation of the seedling stand base plate 50 and the cam body 61, the swing arm 54 reciprocally swings around the support shaft 53 at the base end, whereby the nail guide 49 moves linearly.

Further, it is provided with a roller 59 provided at the tip end portion of the seedling nail base plate 50, and a seedling picking nail guide 60 that engages with the roller 59 and guides its movement. The seedling picking nail guide 60 is formed with a groove so as to form a substantially arcuate cam surface, and is fixed to a seedling picking nail guide mounting stay (not shown) fixed to the seedling picking nail case 63 via a fixture. Has been done.

The roller 59 is guided by the cam surface of the seedling picking nail guide 60 to move in a substantially arcuate locus.

The seedling picking base 48 is guided by the seedling picking guide 60, and the seedling picking tool composed of the seedling picking nail 48, the nail guide 49 and the seedling picking block 51 draws a predetermined trajectory while changing its posture. The seedling take-out claw 48 is moved forward and backward and opened and closed at appropriate timings to take out the seedlings from the seedling raising pot 41 of the seedling tray 40 at the seedling taking-out position, and the seedling planting section C
It is configured to be supplied to the seedling container 70.

FIG. 7 shows a side view showing a state in which seedlings are being conveyed by the seedling take-out nail 48.
The seedling take-out claw 48 operates by drawing a predetermined trajectory K as shown in FIG. That is, with respect to the seedlings in the seedling raising pot 41 of the seedling tray 40 located at the seedling take-out position, the seedling take-out nails 48 are made to plunge into the bed soil of the seedlings from the leaf side of the seedlings, and the stabbed seedlings are retracted at the seedling take-out nails 48. By operation, the seedling raising pot 21 is taken out to the middle of the depth, the posture of the seedling taking-out nail 48 is changed and moved from within the seedling raising pot 41, and the posture facing the seedling tray 40 is changed to a substantially downward posture. The seedling take-out claw 48 is moved and the posture is changed, and the seedling take-out claw 48 and the claw guide 49 that guides it at the final position are moved relative to each other to remove the seedling from the seedling take-out claw 48 and plant the seedlings. It is configured to be supplied to the seedling container 70 of the part C.

(Seedling planting department)
As shown in FIG. 3 described above, the seedling planting section C passes through the plurality of seedling housing bodies 70 that receive seedlings from above and house seedlings inside, and the seedling housing bodies 70 above the seedling planting body 71. The seedling supply table 72 having a moving mechanism for moving the seedling in such a manner as described above and the bottom of the seedling container 70 is opened above the seedling planting body 71 to drop the seedlings housed inside to drop the seedlings in the seedling planting body 25. A supply opening mechanism (not shown) is provided. Here, the seedling take-out device B2 is arranged in the winding area of the seedling supply table 72. With this configuration, a space in which no other member is arranged can be used, and the transmission shaft can be easily taken out from below. Further, the seedling take-out device B2 can be arranged sufficiently apart from the seedling container 70, and the occurrence of interference can be prevented.

In addition, the seedling take-out device B2 is arranged to take out the seedlings from the seedling placing table B1 across the front upper part of the seedling feeding area of the seedling feeding table 72 (the area where the seedling container 70 moves around). The vertical distance between the seedling take-out device B2 and the seedling supply table 72 can be narrowed, and the vertical height of the machine becomes compact.

Further, the seedling take-out device B2 is configured to throw the seedlings into the seedling container 70 which has reached the front center position of the seedling supply table 72. This ensures a sufficient distance between the feeding position and the dropping position to the seedling plant 71, adjusts the posture of the seedling in the seedling container 70 during transportation, and drops the seedling to the seedling plant 71 appropriately. it can.

The seedling planting section C has a multi-row planting configuration in which a plurality of beak-shaped openable seedling planters 71 are arranged side by side at predetermined intervals. In this embodiment, the two seedling planting bodies 71 are arranged side by side at a set interval and are arranged in two rows. Furthermore, the seedling planting body 71 is configured to be slidable and fixable in the left-right direction by a left-right adjusting mechanism (not shown), whereby the planting position can be adjusted in the left-right direction.

The seedling plant 71 is attached to a vertical movement mechanism that is a mechanism for moving the seedling plant 71 up and down. The vertical movement mechanism includes upper and lower elevating links 73 whose rear portion is connected to the seedling planting body 71. Then, the upper and lower elevating links 73 are moved up and down by the power from the planting link case 74 which is transmitted from the planting transmission case 31, the left and right seedling planting bodies 71 are vertically moved, and the seedlings are planted in the field. Has been done.

The planted link case 74 is arranged in the rear part of the planted transmission case 31, and a transmission shaft 75 extending from the planted transmission case 31 is connected to an upper part of the planted link case 74. As a result, the electric shaft 75 can be easily arranged in a straight line in the front-rear direction, and an arrangement space can be easily secured. The planted link case 74 is also configured to transmit power to the moving mechanism of the seedling take-out device B2 and the seedling supply table 72 arranged above.

FIG. 8 is a block diagram showing a control system, a detection system and a drive system of the seedling transplanter.
The control unit CU of the seedling transplanter is configured to be able to control the power transmission from the PTO transmission shaft 26 to the planted transmission case 31, and thereby, based on the rotation speed of the ground roller 33 detected by the rotation sensor 38. , Changing the lateral movement speed of the seedling placing table B1 by the control of the lateral movement mechanism, the operation period of the seedling take-out pawl 28, the vertical feeding speed diagonally downward of the seedling tray 20 by rotating the transport chain 26, and the raising/lowering speed of the seedling plant 71. Is configured to. Regarding the change of the ascending/descending speed of the seedling plant 71, the seedling planting section C is provided with a well-known planting power transmission control mechanism in which the operation cycle of the solenoid is variable and the planting clutch is intermittently turned on. The control unit CU changes the operating interval of the planting transmission control mechanism from the rotation speed of the rotation sensor 38 by controlling the planting transmission control mechanism, and adjusts the planting front-rear spacing (between plants) between seedlings. Is configured.

Thereby, it is possible to judge the change of the moving distance due to the slip or the like from the rotation speed of the grounding roller 33, and change the planting speed of the seedling planting body 71 according to the change of the moving distance. The planting distance between seedlings is kept constant, and the accuracy of harvesting work and the quality of crops are improved.

In addition, the control unit CU is configured to notify the operator by the notification device 80 such as a buzzer when the ridge detection sensor 18 is in the detection state. Thereby, in the riding type seedling transplanting machine, the operator can be notified of the passage of the ridge with poor visibility, and the operator can be prompted to prevent excessive traveling. As a result, it is possible to prevent the seedlings from being planted at the position where they have passed the ridges, and to prevent the generation of seedlings that cannot be planted in the field.

The control unit CU includes a distance sensor 81 that detects the moving distance of the traveling vehicle 1. After the ridge edge detection sensor 18 is in the detection state, the distance sensor 81 is traveled in a predetermined storage unit in advance. When it is detected that the traveling vehicle 1 has moved a distance D (see FIG. 1) from the front end portion of the vehicle 1 to the front end of the ground roller 33, the engine E is controlled to stop traveling of the traveling vehicle 1. ing.

With this configuration, when the traveling vehicle 1 continues traveling after the ridge edge detection sensor 18 detects the ridge edge, the traveling vehicle 1 stops traveling at a position where the ground roller 33 reaches immediately before the ridge edge. Is configured. As a result, the seedlings are surely planted from the top of the ridge to a position where the ridge can be planted near the ridge, and excessive traveling is prevented, so that work efficiency is improved.

As shown in FIG. 1 above, the seedling transplanter is equipped with a water tank for storing water, a pump capable of sucking/discharging water, and an irrigation hose for irrigation, and irrigates the planting position by the seedling plant 71. A irrigation device M configured as possible is provided. 9 is a vertical cross-sectional view of the stopper valve 90 that controls the water flow of the irrigation system M, and FIG. 10 is a cross-sectional view taken along the line AA of FIG.

As shown in FIG. 9, the stopper valve 90 has a first connector provided with two connectors including a water absorption side flow passage port 91 communicating with a water tank and a water discharge side flow passage port 92 communicating with a watering hose. The casing member M1 and the second casing member M2 having one connector including the pump side flow passage pipe port 93 communicating with the pump.

The first casing member M1 is removably fitted with a snap fit M1a to an engaging portion M2b provided on the second casing member M2, and the second casing member M2 is attached to the first casing member M1. The snap fit M2a is detachably fitted to the provided engaging portion M1b so that the snap fit M2a can be detached from each other without tools, and can be easily disassembled and cleaned.

An O-ring 93a, a ball member 94a capable of moving forward and backward, and a ball member 94a are connected to a connecting portion of a water outlet side pipe mouth of the water absorption side flow passage pipe mouth 91 and a water flow inlet side pipe mouth of the second casing member M2. Springs 95a are provided. A cross-shaped wall surface 96a is sequentially provided behind the movable range of the ball member 94a. When the pump absorbs water and the water moves along the arrow X, the wall surface 96a of the moving cross serves as a stopper for the ball member 94a, and the fluid escapes from the gap of the wall surface 96a of the cross.

Similarly, an O-ring 93b, a ball member 94b that can move forward and backward, and a ball member at the connection portion between the pipe outlet on the water outlet side of the second casing member M2 and the pipe inlet on the water inlet side of the water discharge side flow passage 92. A spring 95b connected to 94b is sequentially provided. Thereby, when the pump discharges and the water moves along the arrow Y, the wall surface 96b of the moving cross serves as a stopper of the ball member 94b, and the fluid is configured to escape from the gap of the wall surface 96b of the cross. In this way, by providing the cross-shaped wall surfaces 96a and 96b, the movable range of the ball members 94a and 94b is limited, and the flow path is not blocked when the flow rate is large and overload occurs. ing.

As shown in FIG. 9, the stopper valve 90 has O-rings 93a and 93b, ball members 94a and 94b, and springs 95a and 95b arranged point-symmetrically, two connectors on one side and connectors on the other side. With the structure of the single connector, it is possible to control the one-way flow path with a small number of connection hoses, and save space.

FIG. 11 is an overall plan view of a seedling transplanter according to another embodiment.
In FIG. 2, the ground roller 33 is composed of a single roller member having a predetermined length in the left-right direction. However, as shown in FIG. 11, it is composed of a pair of left and right ground rollers 33, 33. You may. In this case, the left and right widths W1 related to the arrangement of the grounding rollers 33 are arranged to be equal to or larger than the left and right arrangement widths W2 related to the arrangement of the seedling planting bodies 71 of the seedling transplanting device 3, and the pair of left and right grounding portions are grounded. The rollers 33, 33 are arranged in front of the left and right seedling planting bodies 71, respectively. As a result, the pressure suppression effect of the ground roller 33 can be improved, and the planting accuracy of the left and right seedling planting bodies 71 can be improved. Further, by arranging the left and right grounding rollers 33, 33 with a left-right spacing, the left and right grounding rollers 33, 33 do not ride up even if there is an obstacle such as a stone between the left and right of the planting position. Therefore, the planting positions of the seedlings can be surely suppressed.
Further, when only one of the right and left grounding rollers 33 suppresses a large convex portion, the other grounding roller 33 does not lift or the lifting height can be suppressed, so that the planting positions of the seedlings are surely suppressed respectively. can do.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and those modifications are also included in the scope of the present invention. Needless to say.

1 Traveling Vehicle 2 Elevating Link Device 3 Seedling Transplanting Device 6, 6 Front Wheel 7, 7 Rear Wheel 10 Main Frame 11 Mission Case 12 Engine 14 Steering Post 16 Steering Handle 17 Operation Panel 18 Ridge Edge Detection Sensor 19 Step 20 Pilot Seat 22, 22 front wheel support case 24, 24 rear wheel support case 26 PTO transmission shaft 27 upper link 28 lower link 29 link support frame 31 planted transmission case 32 mounting plate 33 grounding roller 34 compression wheel mounting stay 35 compression wheel 36 compression wheel lifting cylinder 37 Potentiometer 38 Rotation sensor 39 Distance sensor 40 Seedling tray 44 Bottom plate 45 Presser frame 46 Conveying chain 64 Seedling tray recovery stand 71 Seedling planting body 72 Seedling feeding table 73 Elevating link 74 Planting link case 90 Stopper valve A Squeezing section B Seedling feeding section B1 Seedling stand B2 Seedling removal device C Seedling planting unit CU Control device M Watering device

Claims (7)

A traveling vehicle equipped with a cockpit and capable of traveling,
A seedling transplanter, which is provided at the rear of the traveling vehicle and includes a seedling transplanting device capable of transplanting seedlings in a field,
The seedling transplanting device is provided so that the height position can be changed up and down by expanding and contracting the hydraulic cylinder of the lifting link device, and is vertically rotatable within a predetermined range without depending on the expansion and contraction of the hydraulic cylinder of the lifting link device. In addition, it is equipped with a pressure-reducing part that can suppress the ridge surface by a grounding roller that contacts the ridge surface.
The seedling transplanter according to claim 1, wherein the pressure suppression unit is provided so that a vertical position of the ground roller can be adjusted. The seedling transplanting device comprises a seedling planting section for planting seedlings in a field, and a seedling supplying section for supplying seedlings to the seedling planting section,
The seedling planting section comprises a plurality of seedling planting bodies for planting seedlings in the field by vertical movement,
The seedling supply unit is a seedling mounting table configured to load a seedling tray containing seedlings and to convey the seedlings in a predetermined direction,
A seedling take-out device for taking out seedlings from the seedling tray loaded on the seedling placing table is provided,
The seedling planting unit is configured to receive the seedlings supplied from the seedling removing device, and to supply the seedlings to the plurality of seedlings by moving the seedlings by a moving mechanism.
The compression section includes a planting transmission case that is transmitted to the seedling supply section and the seedling planting section,
The planted transmission case is configured to support the seedling supply section at the top, and the ground roller is provided at the bottom,
The seedling transplanter according to claim 1, wherein the left and right widths of the ground roller arrangement are equal to or more than the left and right widths of the plurality of seedling planting bodies. .. The seedling planting section includes a seedling supply table that moves the seedlings by the moving mechanism.
The seedling extracting device and the seedling supply table are arranged above the planted transmission case,
The seedling take-out device is configured to take out the seedlings over the transport area of the seedling supply table,
The seedling transplanting machine according to claim 2, wherein each of the plurality of seedling planting bodies is configured to be capable of adjusting a planting position in the left-right direction. Further, a rotation sensor for detecting the number of rotations of the ground roller,
A planting transmission control mechanism capable of changing the planting front-rear spacing of the plurality of seedling planting bodies,
4. The planting transmission control mechanism is configured to change the planting front-rear spacing according to the number of rotations detected by the rotation sensor. Seedling transplanter. The crushing section includes a crushing wheel that compresses the soil around the planted seedling,
The compression wheel is attached to the rear end of the compression wheel mounting frame extending to the rear of the machine body, and the compression wheel mounting frame can be rotated by an electromagnetically controllable compression wheel lifting cylinder to adjust the vertical height. Is provided,
Further, a compression angle sensor capable of detecting the vertical position of the compression wheel is provided at the front end of the compression wheel mounting frame.
When it is determined that the packer wheel is not grounded according to the vertical position of the packer wheel detected by the packer angle sensor, the packer wheel lifting cylinder is operated to move the packer wheel downward to ground. The seedling transplanter according to any one of claims 1 to 4, which is configured as described above. A ridge end detection sensor for detecting the ridge end arranged in the front part of the traveling vehicle,
A distance sensor for detecting a moving distance of the traveling vehicle,
With an informing device capable of informing the operator,
When the ridge detection sensor is in the detection state, the notification device is configured to notify the worker,
After the ridge edge detection sensor is in the detection state, the traveling vehicle continues traveling, and when the distance sensor detects the front-rear distance from the front portion of the traveling vehicle to the ground roller, as a moving distance, The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to stop the traveling of the traveling vehicle. The seedling mounting table is provided with a seedling tray recovery table that is continuously provided at the rear of the seedling mounting table, which is the transportation side of the seedling tray, and the seedling tray recovery table is configured to be the transporting end point of the seedling tray.
The seedling transplanting machine according to claim 2 or 3, wherein the seedling tray collecting base is arranged on the traveling vehicle side so that a front end portion thereof faces an upper portion of the traveling vehicle.