JP2017070216A - Seeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seeder capable of putting soil in an appropriate amount to a seeding groove regardless of soil quality in a field.SOLUTION: A seeder includes: a seeding device 82 arranged on a travel vehicle body 2 and feeding a seed; a hardness/softness detection device 206 detecting hardness/softness in a field; a seeding soil covering member 59 embedding a seed fed to a field by the seeding device 82; a soil covering switch member 66 changing soil covering posture of the seeding soil covering member 59 according to detection of the hardness/softness detection member 206; a soil covering adjustment member 208 changing setting of the hardness/softness detection device 206 operating the soil covering switch member 66; and a control device 100 controlling operation of the soil covering switch member 66. When the soil covering adjustment member 208 is operated to a predetermined hardness/softness setting position, the control device 100 changes a soil covering width of the seeding soil covering member 59 and controls a movement range of the seeding soil covering member 59.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seeder for supplying seeds to a field.

  Conventional sowing machines are known in which seeding grooves into which seeds enter are formed in a field scene, and soil is buried after seed supply.

  Patent Document 1 discloses a configuration in which a seeding groove body that forms a seeding groove in a farm field and a seeding covering earth plate that closes the seeding groove by bringing soil into the float are provided on the float. In addition, a soil softness sensor that detects the soil softness and softness of the field, and a soil covering adjustment motor that changes the soil covering range of the sowing cover plate according to the softness detected by the soil softness sensor are provided. A technique for automatically adjusting and stabilizing the amount of soil brought to the sowing groove is disclosed.

  Furthermore, since the degree of hardness of the field varies depending on the area where the field is located and the previous process of sowing, a hardness setting dial for setting the hardness of the soil hardness sensor is provided, and the soil covering adjustment motor is activated by the operating position of the hardness setting dial. A technique for changing the detection amount of a soil softness sensor is disclosed.

  The soil softness sensor consists of a reference sensor wheel that touches the field and a change sensor wheel that moves up and down due to soil softness. It detects soil hardness.

  According to the above configuration, since the sowing groove is buried with an appropriate amount of soil even if the hardness of the field changes, excess or deficiency of the soil covering the seeds is prevented, and germination is improved, and seed damage by birds and animals is prevented.

  In addition, since the operator does not need to operate the sowing cover plate to change the covering range for each position of the field, the operator can concentrate on the operation of the traveling vehicle body equipped with the sowing machine. And work efficiency is improved.

JP 2014-233234 A

  However, in the seeder of Patent Document 1, the change sensor wheel of the soil hardness / softness sensor does not move when the soil quality of the field is particularly hard, and even if there is a change in hardness / softness, the soil cover width of the seeding cover plate may not be changed. . Accordingly, there is a problem that a sufficient amount of soil is not brought to the sowing groove, and germination of seeds is delayed due to low temperature or eaten by birds and beasts.

  An object of the present invention is to provide a seeder capable of bringing an appropriate amount of soil into the sowing groove regardless of the soil quality of the field.

  The invention described in claim 1 is provided with a seeding device (82) for supplying seeds to the traveling vehicle body (2), a hardness / softness detection device (206) for detecting the hardness of the field, and the seeding device (82) is provided in the field. A seeding covering member (59) for burying the seeds supplied to the seed, and a covering covering switching member (66) for changing the covering position of the seeding covering member (59) upon detection of the hardness / softness detection member (206). A seeding adjustment member (208) that changes the setting of the hardness / softness detection device (206) that operates the switching member (66) is provided, and a seeding device that includes a control device (100) that controls the operation of the soil covering switching member (66) In the machine, when the soil covering adjustment member (208) is operated to a predetermined hardness / soft setting position, the control device (100) changes the soil covering width of the sowing soil covering member (59) and the sowing soil covering member (59). ) It was seeded machine, characterized in that to limit the range of movement.

  According to the second aspect of the present invention, the hardness / softness detection device (206) includes a soil detection body (203b) that moves due to the hardness of the field, and a movement amount detection member that detects the movement amount of the soil detection body (203b). 205), and when the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard / soft setting position, the control device (100) covers the sowing soil covering member (59). The position after movement of the sowing cover member (59) is fixed as a reference position, and the movement of the sowing cover member (59) to the side where the cover width becomes narrower than the reference position is regulated. The seeder according to claim 1 is provided.

  According to a third aspect of the present invention, the hardness / softness detection device (206) includes a soil detection body (203b) that moves due to the softness of a field, and a movement amount detection member that detects a movement amount of the soil detection body (203b). 205), and when the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard / soft setting position, the control device (100) covers the sowing soil covering member (59). Is moved to a side where the seeding covering member (59) is moved, the position after the movement of the seeding covering member (59) is fixed as a reference position, and the movement of the seeding covering member (59) to the side where the covering width is wider than the reference position is regulated. The seeder according to claim 1 is provided.

  According to a fourth aspect of the present invention, when the control device (100) operates the soil covering adjustment member (208) to one side end (H3) of the hardness / softness setting position, the control device (100) detects the hardness / softness detection member (206). Regardless of movement of the sowing covering member (59), the sowing machine according to claim 2 or 3 is provided.

  According to the fifth aspect of the present invention, when the soil covering adjusting member (208) is operated to one side end (H3) of the hard and soft setting position, the soil covering width of the sowing covering soil member (59) is maximized or minimized. A seeder according to claim 4, which is characterized.

  According to a sixth aspect of the present invention, the control device (100) moves the soil covering adjusting member (208) from the other end (N1) of the hard / soft setting position to a predetermined hard / soft setting position (N2, N3, N4). The seeding according to any one of claims 1 to 5, wherein when operated within the range, the covering width of the seeding covering member (59) is changed based on the detection of the hardness / softness detecting member (206). It was a machine.

  According to the seventh aspect of the present invention, a detection arm (204b) in which the soil detection body (203b) is mounted on the seeding frame (62) of the seeding device (82) is provided so as to be rotatable up and down, and the detection arm (204b) 6. The seeding according to claim 2, wherein a urging member (209) for urging upward is detachably provided on the seeding frame (62) and the detection arm (204 b). It was a machine.

  According to the first aspect of the present invention, when the soil covering adjustment member (208) is operated to the predetermined hardness / soft setting position, the soil covering width of the sowing soil covering member (59) is changed, so that the hardness / softness detecting member (206) Since the cover width of the sowing cover member (59) can be moved to a position corresponding to the hardness of the field before detection, the germination time is delayed if the seeds are not sufficiently buried or are buried in excessive soil. In addition, seeds are prevented from being lost due to food damage by birds and beasts.

  Further, the movement range of the sowing cover member (59) is limited, so that the sowing cover member (59) is too close to or away from the seed burying position regardless of the detection of the hardness / softness detection member (206). Can be prevented.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard and soft setting positions, the soil covering width is expanded. The reference position of the sowing cover member (59) is changed to the side, and the movement of the sowing cover member (59) to the side where the cover width becomes narrower than the reference position is restricted, so that the cover width is excessively narrowed. Therefore, seeds can be reliably buried, and the germination rate can be improved and seed loss due to food damage can be prevented.

  In addition, when working with soil that is difficult to operate the hardness / softness detection device (206), the soil covering width of the sowing cover member (59) can be secured above a certain level, so that the seeds can be buried more reliably. .

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, when the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard and soft setting positions, the soil covering width is narrowed. The reference position of the sowing cover member (59) is changed to the side, and the movement of the sowing cover member (59) to the side where the cover width becomes wider than the reference position is restricted, so that the cover width is excessively widened. This prevents the seeds from being buried in a large amount of soil, thereby improving the germination rate and stabilizing the germination time.

  In addition, when working with soil that allows the hardness / softness detection device (206) to operate easily, the soil covering width of the sowing cover member (59) can be prevented from expanding beyond a certain level, so that it is ensured that the seeds are buried in a large amount of soil. Is prevented.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 2 or 3, when the soil covering adjusting member (208) is operated to one end (H3) of the hardness setting position, the hardness detection is performed. Regardless of the detection of the member (206), by restricting the movement of the sowing cover member (59), the seed is buried with an appropriate amount of soil even in a very hard or very soft field. Therefore, the germination rate is improved and seed loss due to food damage is prevented.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the covering soil of the sowing covering member (59) is maximized or minimized by the covering width of the sowing covering member (59) being maximized or minimized. Since the width can be secured above a certain level, the seed can be buried with an appropriate amount of soil, so that the germination rate is improved and the disappearance of the seed due to feeding damage is prevented.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, a predetermined hardness setting position (N2) from the other end (N1) of the hardness setting position. , N3, N4), the operating range of each hard / soft setting position of the soil covering adjusting member (208) is sufficiently secured by changing the soil covering width based on the detection of the hard / soft detecting member (206). Therefore, it is possible to prevent the occurrence of excess or deficiency of the soil in which the seed is buried due to an erroneous operation of the soil covering adjustment member (208).

  According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 2 to 5, the urging member (209) for urging the detection arm (204b) upward is seeded. By providing the frame (62) and the detection arm (204b), it is possible to restrict the detection arm (204b) from rotating too much downward due to the influence of the soil detection body (203b). Even if the detection arm (204b) does not rotate sufficiently upward, the hard / soft detection member (206) is prevented from detecting a change in soil quality, the soil covering width of the sowing cover member (59) is appropriately changed, Improvement of germination rate and loss of seeds due to food damage are prevented.

  In addition, since the urging member (209) is detachably provided, the urging member (209) having a different urging force can be exchanged according to the soil quality of the field, so that the hardness / softness detection member (206) is made of soil. Failure to detect changes is prevented.

Side view of seeder Plan view of main parts of seeding machine (A) Main part plan view of soil softness sensor, (b) Main part side view of soil softness sensor Top view of soil covering adjustment dial (A) Main part side view showing the amount of movement of the soil softness sensor that causes the soil covering adjustment motor to rotate the seeding covering plate when the soil covering adjustment dial is operated in the first stage, and (b) the soil covering adjusting dial in the fourth stage. Side view of the main part showing the amount of movement of the soil softness sensor that causes the soil covering adjustment motor to rotate the seeding cover plate when operated, (c) Plan view of the main part showing the rotation range of the seeding covering plate (A) Side view of the main part showing the amount of movement of the soil softness sensor that causes the soil covering adjustment motor to rotate the seeding covering plate when the soil covering adjustment dial is operated to the “super hard” first stage, (b) the soil covering adjustment dial The main part plan view showing the rotation range of the sowing cover plate when operated in the “Carbide” first stage, (c) The soil covering motor is seeded when the soil covering adjustment dial is operated in the “Carbide” second stage Side view of the main part showing the amount of movement of the soil softness sensor that rotates the earth covering plate, (d) The main part plane showing the rotation range of the sowing earth covering plate when the earth covering adjustment dial is operated in the “super hard” second stage. Figure, (e) Side view of the main part showing the soil hardness / softness sensor when the soil covering adjustment dial is operated at the “super hard” third stage, (f) When the soil covering adjustment dial is operated at the “super hard” third stage Main plane showing sowing cover plate The flowchart which shows the control which changes the sowing action width | variety of a sowing cover soil board by the detection of a soil softness sensor A block diagram showing the control relationship between various sensors and the members to be controlled, centering on the controller (A) The principal part top view of the soil softness sensor of another structural example, (b) The principal part side view of the soil softness sensor of another structural example (A) Plan view of traveling vehicle body provided with fertilizer hopper divided into left and right, (b) Main part plan view showing a state in which left and right fertilizer hoppers are rotated forward. (A) Side view of traveling vehicle body provided with fertilization hopper divided into left and right, (b) Main part side view showing a state in which left and right fertilization hoppers are rotated forward. Top view of a traveling vehicle body with a fertilizer blower that can be stored Flow chart showing HST output decrease when traveling vehicle body is tilted left and right, and operation control of alarm device Flowchart showing the lowering of the lifting link device when the traveling vehicle body is tilted left and right and the operation control of the notification device

  The direct sowing machine of the present embodiment has a direct sowing machine mounted on the rear part of the traveling vehicle body 2, and FIG. 1 shows a left side view of a riding type direct sowing machine with a fertilizer application. A direct sowing device 82 is mounted on the rear side of the traveling vehicle body 2 via the lifting link device 3 so as to be movable up and down, and the fertilizer 5 is provided on the rear upper side of the traveling vehicle body 2.

  In the present specification, the left and right directions are set to the left and right, respectively, with the forward direction of the direct seeding machine as a reference, the forward direction is the front, and the reverse direction is the rear.

  As shown in FIG. 1, the traveling vehicle body 2 is a four-wheel drive vehicle including left and right front wheels 10, 10 and left and right rear wheels 11, 11, and a transmission case is provided at a front portion of a main frame 15 constituting the traveling vehicle body 2. 12 and left and right front wheel transmission cases 13 and 13 that transmit to the left and right front wheels 10 and 10 are provided on both left and right sides of the transmission case 12.

  In addition, left and right rear wheel transmission cases 18 and 18 are fixed to both the rear left and right sides of the main frame 15 via connecting members such as bolts, and the left and right rear wheel transmission cases 18 and 18 are mounted on rear axles. Left and right rear wheels 11, 11 are provided and configured.

  Then, an engine 20 is provided on the main frame 15 and on the rear side of the fuselage with respect to the transmission case 12, and a transmission belt mechanism 21 that transmits the power of the engine 20 to the transmission case 12 via an HST (continuously variable transmission) 23. Is provided. The driving force transmitted to the transmission case 12 is shifted by a transmission (not shown) built in the transmission case 12, and is separated into traveling power and external power to be extracted.

  Driving power is transmitted from the left and right front wheel transmission cases 13, 13 to the left and right front wheels 10, 10, and from the left and right rear wheel transmission cases 18, 18 to the left and right rear wheels 11, 11. It is transmitted to the direct seeding device 82 via a transmission clutch case (not shown) provided at the rear portion of the vehicle body 2, and is transmitted to the fertilizer application device 5 via the fertilizer transmission mechanism 28.

  An engine cover 30 is provided on the upper part of the engine 20, and a seat 31 is provided on the upper surface of the engine cover 30. A bonnet 32 having various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the left and right front wheels 10 and 10 is provided on the bonnet 32. Below the engine cover 30 and the bonnet 32 or above the main frame 15 is provided a horizontal floor step 35 in which an operator moves, and the rear portion of the floor step 35 has left and right rear wheels 11, 11. A bent portion that protrudes in a direction covering the upper side is formed, and the rear step 36 is located above the airframe from the floor step 35.

  The elevating link device 3 includes an upper link 40 and left and right lower links 41, 41, and one end of the upper link 40 and the left and right lower links 41, 41 is erected at the rear end of the main frame 15. The link base frame 42 is rotatably provided and attached to the docking plate 43 at the other end.

  The docking plate 43 is connected to a rolling cylinder 47 that extends and contracts in the left-right direction provided on the upper part of the sowing frame 62 when the direct sowing device 82 is mounted. Further, the sowing frame 62 is provided with a horizontal sensor 48 for detecting the inclination of the direct seeding device 82 in the left-right direction. When the horizontal sensor 48 detects the inclination in either the left or right direction, the control device 100 moves the rolling cylinder 47. Extend and contract. When the horizontal sensor 48 no longer detects the tilt in the left-right direction, the expansion and contraction of the rolling cylinder 47 stops.

  A lifting cylinder 46 is provided between a support member (not shown) fixed to the main frame 15 and the tip of a swing arm 45 formed integrally with the upper link 40. When the lifting cylinder 46 is expanded and contracted, the upper link 40 is extended. Is rotated up and down, the direct seeding device 82 is lifted and lowered in a substantially constant posture.

  As shown in FIG. 2, a plurality of sowing floats 55 are arranged at predetermined intervals below the direct sowing apparatus 82. The sowing float 55 is arranged in accordance with the sowing position of the direct sowing apparatus 82 and the fertilizing position of the fertilizing apparatus 5, and specifically, the sowing position and fertilizing position for two strips with one sowing float 55. Leveling, grooving, and soil covering are performed.

  A leveling extension 55a that projects rearward and levels the farm scene is formed at the center in the left-right direction of the sowing float 55, and both left and right sides of the leveling extension 55a are spaces. Fertilization groove bodies 56 and 56 for forming fertilizer grooves for receiving fertilizer supplied from the fertilizer application device 5 are embedded in the rear portions of the right and left sides of the sowing float 55 and in front of the leveling extension portion 55a. Fertilization covering soil plates 57 and 57 for bringing soil to be covered, sowing groove bodies 58 and 58 for forming seeding grooves into which seeds supplied from the direct sowing apparatus 82 are placed, and a sowing covering soil plate for bringing soil to fill the sowing grooves A pair of left and right 59 and 59 are provided.

  The left and right fertilization covering earth plates 57, 57 are provided closer to the center of the sowing float 55 in the left-right direction than the left and right fertilization groove bodies 56, 56 so as to be rotatable in the left-right direction around the rotation support shaft 57a. Then, bolts and nuts are inserted into arc-shaped elongated holes 57b formed on the rear side of the machine body relative to the rotating support shaft 57a, and the nuts are tightened or loosened, so that the soil covering range of the fertilizer covering plates 57 and 57 is increased. Configure to be changeable.

  And the said left and right fertilization groove bodies 56,56 are comprised as a protrusion which forms a concave-shaped groove | channel in a field scene, The fertilizer application of the fertilizer 5 at the rear-end part of this left and right fertilization groove bodies 56,56 A fertilizer guide port 56a for guiding the fertilizer discharged from the hose 71 to the fertilizer groove is provided.

  Further, the left and right sowing groove bodies 58, 58 are provided in the rear outward direction of the sowing float 55 with respect to the left and right fertilization groove bodies 56, 56, and the sowing groove is provided at a position ahead of the sowing position of the direct sowing apparatus 82. Form.

  Further, left and right sowing cover plates 59, 59 are provided on the outer side and rear side of the left and right sowing groove bodies 58, 58, respectively, so as to be pivotable in the left-right direction around the cover turning shaft 59a, and the sowing cover soil. On the upper portions of the plates 59, 59, interlocking plates 60, 60 that rotate together with the sowing cover plates 59, 59 are provided. Also, left and right first cable stays 61, 61 are provided at the attachment positions of the left and right interlocking plates 60, 60.

  The plurality of sowing floats 55 are respectively attached to a sowing frame 62 that constitutes the direct sowing apparatus 82 so as to be vertically rotatable, and are configured to be rotatable according to the unevenness of the field. Further, second cable stays 64 are respectively provided at the left and right center portions of the plurality of sowing floats 55. Covering soil adjusting cables 65 and 65 are provided across the first cable stay 61 and the second cable stay 64.

  Furthermore, a soil covering adjustment motor 66 for changing the soil covering width is provided at the left and right side ends of the sowing frame 62, and a soil covering width switching rod 63 that is long in the left-right direction is attached to the soil covering adjusting motor 66. The soil covering width switching rod 63 is rotatably disposed above the sowing frame 62, and the ends of the left and right soil covering adjusting cables 65, 65 are mounted at predetermined intervals.

  Accordingly, when the soil covering adjustment motor 66 is operated to rotate the soil covering width switching rod 63, the left and right sowing covering plates 59 and 59 are rotated by the left and right soil covering adjusting cables 65 and 65 to change the soil covering range. Become. The left and right soil covering adjustment cables 65 and 65 are provided with springs for moving the left and right seeding covering soil plates 59 and 59 to the left and right sides of the seeding float 55, respectively.

  In addition, grooving arms 69 projecting from the sowing frame 62 to the rear of the machine body are provided between the right and left sowing floats 55 at both left and right ends and the sowing float 55 adjacent to the sowing float 55 at both left and right end portions, On the rear side of the grooving arm 69, a grooving body 70 for forming a deep valley-like (V-shaped) groove in the farm field between the right and left of the sowing position is provided.

  As a result, the gas accumulated in the soil during the sowing operation can be discharged, so that the growth of the roots coming out of the seeds is prevented from being hindered by the gas, the roots are firmly established, and the crops are secured. The growth of is stable.

  In particular, in the case of crops such as paddy rice that grows with water in the field, the grooves 70 are formed in the field by the grooving body 70 so that the flow can be improved when the water is drained. Is prevented from remaining.

  A leveling rotor 27 that is driven from the left and right sides of the rear wheel transmission case 18 via a leveling transmission shaft 72 is disposed below the direct seeding device 82 and in front of the body of the seeding float 55.

  The ground leveling rotor 27 shown in FIG. 1 is transmitted from the left and right side rotors 27 b and 27 b, the center rotor 27 a located in front of the machine body and at the left and right center of the left and right side rotors 27 b and 27 b, and the leveling transmission shaft 27. The driving force transmitted is transmitted to the center rotor 27a and the left and right side rotors 27b, and is composed of left and right leveling transmission cases 73 and 73 that are transmitted from the center rotor 27a to the left and right side rotors 27b. The center rotor 27a and the left and right side rotors 27b and 27b are configured by attaching a plurality of leveling bodies to the respective rotation shafts.

  Note that a rotor moving arm 74 that moves the leveling rotor 27 up and down and a rotor moving motor 75 that moves the rotor moving arm 74 up and down are provided above the seeding frame 62 of the direct seeding device 82 described later. The rotor moving motor 75 is operated by operating the rotor height adjustment dial 76 to change the operating position of the leveling rotor 27.

  Thereby, since the operator can arbitrarily change the operating position of the leveling rotor 27, the leveling rotor 27 does not come into contact with the field scene, and the leveling is not performed, so that the soil hardness / softness sensor 206 actually detects the hardness. It is prevented from differing from the soil quality.

  Further, when the working position of the leveling rotor 27 is too low, the leveling rotor 27 disturbs the soil of the farm scene, and there is no soil around the seeds, and the soil quality is partially softened. The soil hardness / softness sensor 206 is prevented from being erroneously detected.

  3 (a) and 3 (b), a mounting hitch 67 for docking the direct seeding device 82 to the lifting link mechanism 3 is provided at the left and right center of the sowing frame 62, and a sensor is provided on the side of the mounting hitch 67. A mounting arm 200 is provided. A vertical position adjustment plate 201 having a vertical hole 201a formed in the vertical direction is provided at the front end of the sensor mounting arm 200. Bolts and nuts are inserted into the long hole 201a of the position adjustment plate 201, and a sensor stay 202 is provided. Is mounted so that the vertical position can be adjusted.

  Furthermore, the sensor stay 202 has a first sensor arm 204a equipped with a grounding wheel 203a having a wide left and right width that rotates in contact with the soil surface of the field, and a narrow left and right width approach that enters and rotates in the soil of the field. The second sensor arms 204b to which the wheels 203b are attached are provided so as to be independently rotatable.

  The sensor stay 202 is provided with a potentiometer 205 for detecting a difference in rotation angle between the first sensor arm 204a and the second sensor arm 204b, thereby forming a soil softness sensor 206. When the soil hardness / softness sensor 206 detects a change in the rotation angle of the first sensor arm 204a and the second sensor arm 204b, the soil hardness / softness sensor 206 transmits a signal to the control device 100, and operates the soil covering adjustment motor 66 to operate the left and right sowing cover plates. This is a sensor for changing the covering range of 59,59.

  The soil hardness / softness sensor 206 is provided at the rear side of the machine body relative to the center rotor 27a and at the front side of the machine body relative to the seeding float 55, thereby detecting the soil softness / softness of the soil according to the field scene where the center rotor 27a is leveled. Therefore, it is possible to prevent the approach wheel 203b and the second sensor arm 204b from rotating up and down due to the unevenness of the field and erroneously detecting hardness and softness.

  In addition, by detecting the softness on the front side of the aircraft with respect to the sowing float 55, the covering width of the right and left sowing covering plates 59, 59 can be changed before the seeds are supplied. Is prevented.

  Note that the outer peripheral edge of the approach wheel 203b has a shape intended to enter the soil, specifically, the cross-sectional shape is a rhombus, and basically enters the soil while the traveling vehicle body 2 is traveling. Accordingly, when the hardness of the soil changes, the approach wheel 203b is pushed up or cut and submerged, so that the second rotating arm 204b rotates up and down in accordance with the hardness of the soil. On the other hand, since the grounding ring 203a is in contact with the surface of the soil, the potentiometer 205 does not move up and down as long as there is no unevenness that affects the surface. Therefore, the potentiometer 205 rotates the first sensor arm 204a and the second sensor arm 204b. The hardness of the soil can be judged from the difference in the amount of movement.

  In addition, if the grounding wheel 203a and the approaching wheel 203b are made of a synthetic resin and have a hollow interior so that the weight of the grounding wheel 203a and the approaching wheel 203b does not easily enter the soil due to its own weight, erroneous detection of softness and softness is unlikely to occur even in a soft soil field. Become.

  The change of the covering width of the left and right seeding covering plates 59, 59 when the hardness of the field is detected as described above will be described with reference to FIGS.

  When the soil softness detected by the soil softness sensor 206 is “soft”, the right and left sowing cover plates 59, 59 lightly push the soil and move a sufficient amount of soil to bury the seeds. The plates 59, 59 are rotated toward the left and right outer sides of the sowing float 55.

  On the other hand, when the soil hardness is “hard”, the soil necessary for burying the seeds does not move unless the soil is guided to the sowing grooves by the left and right sowing cover plates 59, 59. The seeding float 55 is rotated toward the left and right center.

  As a result, seeds can be reliably buried in the sowing groove, so that the germination time of seeds is prevented from being disturbed by a difference in temperature between the outside air temperature and the soil, and the growth is stabilized and the quality is improved.

  In addition, seeds that are not sufficiently buried can be prevented from being eaten by birds and beasts or blown away by the wind. The quality of the product is improved.

  Alternatively, seeds can be prevented from being buried by an excessive amount of soil, which prevents seed germination, prevents the occurrence of areas without crops, and disturbs seed germination time, stabilizing growth and quality. Is improved.

  The amount of rotation of the left and right seeding cover plates 59, 59 changes stepwise depending on the soil hardness detected by the soil hardness sensor 206, that is, the difference in the rotation angle between the first sensor arm 204a and the second sensor arm 204b. However, it is desirable that the amount of rotation of the left and right sowing cover plates 59, 59 can be changed depending on the soil quality of the field.

  For this reason, the hood 32 is provided with a soil covering adjustment dial 208 shown in FIG. 4 that increases or decreases the amount of rotation of the right and left seeding covering plates 59, 59 in accordance with the operation amount. The soil covering adjustment dial 208 is configured to be operable in a plurality of stages from “standard” to “hard”, seven switching stages N1 to N7 in FIG. The above “standard” is synonymous with “soft”.

  For example, when the soil covering adjustment dial 208 is operated to the most “standard” position, that is, to the first stage N1, the second sensor arm 204b is a predetermined amount (eg, ± 5 to 10 mm) with respect to the first sensor arm 204a. Whenever it moves up and down over the above, the soil covering adjustment motor 66 is operated to move the left and right sowing cover plates 59, 59 over a predetermined range (e.g., 8 to 10 mm). Turn toward the center to increase or decrease the amount of soil covering.

  On the other hand, when the soil covering adjustment dial 208 is operated to the most “hard” position, that is, the seventh stage N7, the second sensor arm 204b is set to a predetermined amount (eg, ± 3 to 5 mm) with respect to the first sensor arm 204a. Each time the cover is moved up and down, the soil covering adjustment motor 66 is operated to rotate the left and right seeding cover plates 59, 59 toward the left and right sides or the center of the left and right of the seeding float 55 over a predetermined range. Increase or decrease the amount.

  In addition, as shown in FIG.5 (c) etc., the rotation of the right and left sowing covering plates 59, 59 is the first covering width W1 when the sowing float 55 is at the most left and right side positions or the most left and right center positions. For example, it moves to the 4th covering soil width W4.

  As described above, the vertical movement amount of the second sensor arm 204b with respect to the first sensor arm 204a for rotating the left and right seeding covering plates 59, 59 becomes smaller as the soil covering adjustment dial 208 is set to the “hard” side. Thereby, even if the soil quality with a small amount of entry into the soil of the approach wheel 203b provided in the second sensor arm 204b is a hard field, it is possible to appropriately change the soil covering range of the right and left seeding covering plates 59, 59. it can.

  That is, by changing the detection content of the soil softness sensor 206 that rotates the left and right sowing cover plates 59, 59 according to the soil soil, it is possible to move an amount of soil suitable for burying the sowing groove, Stabilization of seed germination time and increase of germination rate are achieved.

  However, in the field where the soil quality is very hard and flat, the approach wheel 203b can hardly enter the soil, and the second sensor arm 204b can rotate up and down as the soil covering adjustment motor 66 operates. Therefore, the soil covering width is not changed at the place where it is necessary to change the soil covering width of the right and left seeding covering plates 59, 59, and the seed may not be sufficiently covered with the soil.

  In order to prevent the occurrence of this problem, a configuration in which the operating position of the soil covering adjustment dial 208 and the vertical rotation amount of the second sensor arm 204b on which the soil covering adjusting motor 66 operates are changed are shown in FIGS. This will be described with reference to FIGS.

  First, the soil covering adjustment dial 208 is further operated from the maximum operation position on the “hard” side so that it can be operated in a plurality of stages, for example, the first stage H1 to the third stage H3 at the “super hard” position. Then, when the soil covering adjustment dial 208 is operated to the “hard” first stage H1 from the “hard” side toward “super hard”, the control device 100 activates the soil covering adjusting motor 66 and the right and left seeding covering plates 59. , 59 are rotated by one step (e.g., 8 to 10 mm) to the left and right center side of the seeding float 55, that is, the position corresponding to the second soil covering width W2.

  At this time, when the second sensor arm 204b of the soil softness sensor 206 moves upward over a predetermined range (for example, 3 to 5 mm) with respect to the first sensor arm 204a, the control device 100 moves the soil covering adjustment motor 66. The left and right seeding cover plates 59, 59 are rotated further to the left and right center sides of the seeding float 55 to a position where the third cover width W3 is obtained.

  When the rotation steps of the left and right seeding covering plates 59, 59 exemplified above are four steps, the second sensor arm 204b is within a predetermined range (eg, 3 to 5 mm) with respect to the first sensor arm 204a. When moved further upward, the right and left seeding covering plates 59, 59 are rotated to the left and right central position of the seeding float 55, that is, the position corresponding to the fourth covering width W4.

  When the second sensor arm 204b is moved downward, as shown in FIG. 6 (b), when the left and right sowing cover plates 59, 59 are at the position of the second cover width W2, the cover adjustment motor 66 is operated. The positions of the right and left sowing cover plates 59, 59 are not changed.

  Further, when the soil covering adjustment dial 208 is operated to the “super hard” second stage H2, the control device 100 operates the soil covering adjusting motor 66 so that the right and left seeding covering plates 59 and 59 are located on the left and right center sides of the seeding float 55. Are rotated to a position corresponding to two stages, that is, the third soil covering width W3. At this time, when the second sensor arm 204b of the soil softness sensor 206 moves over a predetermined range with respect to the first sensor arm 204a, the control device 100 operates the soil covering adjustment motor 66, and the right and left sowing covering soil plates 59 are operated. , 59 are further rotated to the left and right center side of the seeding float 55 to a position where the fourth covering soil width W4 is obtained.

  When the second sensor arm 204b is moved downward, as shown in FIG. 6 (d), when the left and right seeding covering plates 59, 59 are at the position of the third covering width W3, the covering control motor 66 is operated. The positions of the right and left sowing cover plates 59, 59 are not changed.

  When the soil covering adjustment dial 208 is operated to the “super-hard” third stage H3, the control device 100 operates the soil covering adjusting motor 66 so that the right and left seeding covering plates 59 and 59 are moved to the left and right of the seeding float 55. It is rotated to the position corresponding to the third step, that is, the fourth covering width W4 toward the center. At this time, even if the second sensor arm 204b of the soil softness sensor 206 moves up and down over a predetermined range with respect to the first sensor arm 204a, the control device 100 does not operate the soil covering adjustment motor 66, The sowing position of the sowing cover plates 59, 59 is maintained.

  With the above configuration, when the soil covering adjustment dial 208 is operated to the “super hard” side, the left and right seeding covering soil plates 59, 59 are rotated toward the left and right center of the seeding float 55, and the second sensor arm 204b is moved upward. By reducing the moving stage, in the hard soil field, the sowing work can be performed with the covering width of the left and right sowing cover plates 59, 59 wide in the left and right directions, so that there is enough soil to bury the sowing groove. The seed germination rate and the growth stability can be achieved.

  Further, when the soil covering adjustment dial 208 is operated to the maximum of “super-hard”, in this case “super-hard” third stage H3, the second sensor arm 204b moves up and down as shown in FIG. Since the left and right seeding covering plates 59, 59 do not move from the fourth covering width W4 where the covering width becomes the maximum, the seeding groove can be filled reliably even in a very hard soil field, and the working conditions are adapted. The characteristics are greatly improved.

  Of the soil covering adjustment dial 208, the first stage N1 to the fourth stage N4 adjust the amount of upward movement of the second sensor arm 204b in which the soil covering adjustment motor 66 operates, and the fifth stage N5 to the seventh stage. If the stage N7 is configured to change from the “super-hard” first stage H1 to the “super-hard” third stage H3 in which the right and left sowing cover plates 59, 59 are brought close to the sowing float 55, the soil covering adjustment dial 208 of each stage Since the movement width can be increased, an erroneous operation due to an incorrect operation position is prevented, and the amount of soil covering is ensured.

  As shown in FIGS. 9A and 9B, a lifting spring 209 that urges the second sensor arm 204b upward may be detachably provided across the position adjustment plate 201 and the second sensor arm 204b.

  With the above configuration, even in a field where the soil quality of the field is very soft and the second sensor arm 204b and the approach wheel 203b sink due to their own weight, the second sensor arm 204b and the approach wheel 203b are biased upward by the lifting spring 209. This prevents the second sensor arm 204b from being lowered and prevents the right and left sowing cover plates 59, 59 from moving from positions on both sides of the sowing float 55, so that the soil is brought into the sowing groove. Seeds can be buried.

  In addition, since the lifting spring 209 is replaced with a lifting spring 209 having a different urging force, the ground contact height of the farm scene and the approach wheel 203b can be kept at a height suitable for detecting softness and softness. It can adapt to more working conditions.

  Further, as shown in FIGS. 9A and 9B, the balance weight 211 is slidable in the vertical direction on the upper part of the shaft part 210 protruding upward on the front side of the machine body with the rotation fulcrum of the second sensor arm 204b interposed therebetween. May be provided. The balance weight 211 is a hollow pillar made of a heavy material such as metal.

  Thereby, by changing the vertical position of the balance weight 211, the weight applied to the second sensor arm 204b, and hence the weight applied to the entry wheel 203b, can be adjusted, so that the entry wheel 203b floats up from the field scene and becomes soft and soft. It is possible to prevent the detection from being lost and to properly cover the soil.

  The sowing float 55 can be rotated up and down at the front end side according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the sowing float 55 is detected by the float potentiometer 68 during direct sowing work. By switching the hydraulic valve that controls the lifting cylinder 46 according to the detection result, the direct sowing device 82 is raised and lowered, so that the seed sowing depth is always kept constant.

  The fertilizer application device 5 feeds the fertilizer (powder particles) stored in the fertilizer hopper 300 by a certain amount by a plurality of feed portions 301 provided in the left-right direction of the traveling vehicle body 2, and seeds the fertilizer with the fertilizer hose 71. The left and right fertilized groove bodies 56 of the float 55 are guided to the rear.

  The fertilizer hopper 300 is provided on the rear side of the traveling vehicle body 2, and when the stored fertilizer decreases, the operator carries the replenishment work by bringing the fertilizer bag from the outside of the machine and from the outside of the field. There is a problem in that it is necessary to reduce work efficiency and to spend extra labor. If a bag or box containing fertilizer is placed on the traveling vehicle body 2, the labor of carrying the fertilizer can be saved, but the range of movement of the operator on the floor step 35 is reduced and fertilizer is loaded on the traveling vehicle body 2. If the amount to be placed is large, the weight of the entire body increases, and the front wheels 10 and the rear wheels 11 are likely to sink into the soil, which affects the detection of the soil hardness sensor 206 and the seeding depth of the direct seeding device 82.

  As shown in FIG. 10 (a), the fertilizer hopper 300 is divided into a left hopper 300a and a right hopper 300b so that the fertilizer is not placed on the traveling vehicle body 2 and the replenishment of the fertilizer is facilitated. When the number of fertilization strips is an even number, the left hopper 300a and the right hopper 300b are each half of the total number of strips. The fertilizer can be stored. On the other hand, when the number of fertilizer strips is an odd number, either the left hopper 300a or the right hopper 300b is larger than the other. For example, if the fertilizer strip is five strips, the left hopper 300a is divided into two strips and the right hopper 300b. However, it is configured to be able to store 3 fertilizers.

  In the above description, the right hopper 300b is made to correspond to the multiple strips, but the side corresponding to the multiple strips is changed depending on whether the HST 23 is provided on the left or right side of the mission case 12. It is assumed that the HST 23 is mounted on the left side of the mission case 12 in the traveling vehicle body 2 of the present case.

  As a result, the left-right balance deviation of the traveling vehicle body 2 due to the weight of the HST 23 can be reduced by the weight of the right hopper 300b, so that the traveling direction of the traveling vehicle body 2 is prevented from being biased to the left and right, and operability is improved. To do.

  As shown in FIGS. 10A and 10B, the left hopper 300a and the right hopper 300b are respectively attached to fertilizer turning arms 302 and 302 that are rotatably provided on the left and right sides of the traveling vehicle body 2, respectively. Can be switched between a fertilizer replenishment position where the left hopper 300a and the right hopper 300b protrude to the front side of the machine body and the side of the machine body, and a fertilization work position which is located at the upper rear side of the traveling vehicle body 2 Configure. Further, a shutter (not shown) that can be opened and closed for each supply strip is provided at the lower part of the left hopper 300a and the right hopper 300b. .

  Thereby, since the left hopper 300a and the right hopper 300b can be rotated and moved to the fertilizer replenishment position, the fertilizer can be supplied from the outside of the traveling vehicle body 2 to the left hopper 300a and the right hopper 300b. The work for the person to get the fertilizer from the traveling vehicle body 2 becomes unnecessary, and the work efficiency is improved and the labor of the worker is reduced.

  Further, since the left hopper 300a and the right hopper 300b can be protruded forward or sideward of the traveling vehicle body 2, it is easy to replenish fertilizer even if the traveling posture of the traveling vehicle body 2 is different according to the state near the field end. The work efficiency can be further improved.

  The left and right fertilization turning arms 302 and 302 are attached to turning support shafts 303 and 303 respectively provided near the center of the traveling vehicle body 2 in the front-rear direction. The fertilizer rotation arms 302 and 302 are provided with a lock device 303a for restricting the rotation of the fertilizer rotation arms 302 and 302 so that the left and right fertilization rotation arms 302 and 302 can be prevented from rotating at a timing not intended by the operator.

  This prevents the left hopper 300a and the right hopper 300b from being separated from the fertilization work position during fertilization work and prevents the fertilizer from being supplied in the vicinity of the sowing position or planting position, and seed and seedling growth failure due to lack of fertilizer. Is prevented.

  Further, the fertilizer falling from the lower portions of the left hopper 300a and the right hopper 300b is prevented from being scattered in the traveling vehicle body 2 and the farm field, and the fertilizer is wasted, and the growth of seedlings and seeds is disturbed due to excessive fertilizer. , The quality of the harvest is prevented from deteriorating.

  As shown in FIG. 12, the fertilizer applying device 5 includes an air chamber 304 through which the fertilizer fed from the feeding section 301... Moves to the fertilizing hose 71 of each strip and passes through an air chamber 304 through which the left hopper 300a and the right hopper 300b pass. A fertilizer blower 306 that generates conveying air is provided on the left and right sides (left side) of the air chamber 304.

  The fertilizer application blower 306 is attached to the fertilizer applicator 5 so as to be rotatable forward and backward, and is located outside the left hopper 300a during fertilization work. If the fertilizer blower 306 is left in use, the left and right widths of the machine body are widened, and extra space is required for storage in a storage position such as a warehouse, and the problem of protruding from the loading platform of the transport truck There is.

  When the fertilizer blower 306 is rotated forward, the fertilizer blower 306 is mostly located in front of the left hopper 300a and the amount of protrusion toward the side of the fuselage is reduced. At this time, the machine body outer side end of the fertilizer application blower 306 is provided at the front side of the traveling vehicle body 2 so as to be freely rotatable, and the machine body outer side end at the storage position of the left and right mounting tables 38, 38 on which seedlings, fertilizers and the like are placed. The position is substantially the same as the part.

  The fertilizer application device 5 is provided with a storage switch 308 that detects that the fertilizer blower 306 has been operated to the storage position.

  When the steering potentiometer 34a detects that the steering wheel 34 has been operated at a predetermined angle or more, that is, when the steering body reaches the steering amount for turning, the control device 100 raises the lifting link mechanism 3 to transmit the traveling vehicle body 2. A mechanism for stopping the direct seeding device 82 by disengaging the work clutch 25a in the clutch case is provided.

  In addition, as shown in FIG. 8, in the control device 100, the rear wheel rotation sensors 309 and 309 for detecting the rotation speeds of the left and right rear wheels 11 and 11, respectively, When it is detected that at least one of the rotation speeds has reached the first predetermined rotation speed, the elevating link mechanism 3 is lowered, and when it is detected that the second predetermined rotation speed has been reached after the elevating link mechanism 3 starts to descend, the work clutch A turning interlocking mechanism that automatically resumes the sowing work after the turning is finished with the state 25a turned on is provided.

  The swivel interlocking mechanism 310 is provided on the bonnet 32 because the swivel interlocking mechanism may be refrained from use depending on differences in work conditions such as the shape of the field and work position, and the preference of the operator. When the turning interlock switch 310 is turned on, the turning interlock mechanism is activated when the above conditions are satisfied.

  However, if the turning interlock switch 310 is turned on and the vehicle is moved outside the field or the like, if the handle 34 is operated greatly during a right or left turn, the detection of the number of rotations of the rear wheel rotation sensors 309 and 309 starts and the first predetermined rotation is detected. When the number of rotations is reached, the elevating link device 3 is lowered and the direct seeding device 82 may approach the ground. When the direct sowing device 82 is lowered, the bottom surface of the sowing float 55 is pressed against the ground, and there is a possibility that breakage occurs due to excessive friction.

  In order to prevent this, as shown in FIG. 8, when the storage switch 308 detects the rotation of the fertilizer blower 306 to the storage position, the control device 100 turns off the turning interlock switch 310 and turns the turning interlock switch. Even if 310 is operated, the on state is not accepted.

  Thereby, even if the turning interlocking switch 310 is forgotten to be turned off, if the fertilizer blower 306 is moved to the storage position, the turning interlocking mechanism is not activated, and thus the direct seeding device 82 is prevented from being lowered unintentionally by the operator, Damage to members provided on the lower side of the direct sowing device 82 such as the sowing float 55 is prevented.

  As shown in FIGS. 1 to 3, the direct sowing device 82 includes a seed feeding part 87 for feeding seeds from an upper seed tank 85, a seed funnel 88 for feeding and guiding seeds, and seeds fed and guided from the seed funnel 88. And a seed conduit (not shown), and the sowing frame 62.

  As shown in FIGS. 1 and 2, the seeds supplied from the seed tank 85 were formed in the field by the sowing grooves 58 and 58 attached to the sowing float 55 via the feeding portion 87 and the fertilization hose 71 and the like. Supplied to the sowing groove.

  The output of the HST 23 is increased or decreased by the amount of operation of the speed change lever 24 provided on the bonnet 32, and forward / backward travel and travel stop are switched by the operation of the speed change lever 24. The operation amount of the shift lever 24 is determined from the operation angle detected by the lever potentiometer 24a, and the control device 100 adjusts the trunnion shaft (not shown) of the HST 23 according to the angle detected by the lever potentiometer 24a. The output control motor 23a that rotates to change the output opening degree of the HST 23 is operated and stopped.

  The output control motor 23a detects the rotation angle of a trunnion arm (not shown) interlocked with the rotation of the trunnion shaft with the HST potentiometer 23b, and the control device 100 transmits when a predetermined angle is detected. Stops when a stop signal is received. Further, when the lever potentiometer 24a detects a reverse operation, the direct sowing device 82 is raised and fertilization and sowing are stopped.

  The traveling vehicle body 2 provided with the direct seeding device 82 enters and exits through an entrance formed by placing soil in the corner of the field or by placing concrete, but the paddy field needs to be filled with water, so the entrance has a certain slope become. When mud deposits at this doorway, ridges are formed by the passage of the front wheel 10 and the rear wheel 11 of the traveling vehicle body 2, and distorted irregularities may occur on the surface when weeds grow.

  When traveling on the above-mentioned slopes when entering / exiting the field, the aircraft tilts in the left / right direction due to distorted unevenness, and the running posture tends to become unstable, so it is necessary to travel at the lowest speed when entering / exiting the field. There is a problem that efficiency does not increase.

  Further, if the boundary between the entrance / exit and the field and the entrance / exit is covered with weeds and mud, it is difficult to determine the position where the handle 34 is operated when entering or leaving the field. If the timing of operating is mistaken, there is a problem that the aircraft will float away from the ground of the entrance and exit, and the aircraft will be greatly inclined in the left-right direction.

  In order to solve this problem, as shown in FIG. 8, the traveling vehicle body 2 is provided with a tilt sensor 250 that detects the tilt in the left-right direction of the airframe, and the tilt angle detected by the tilt sensor 250 is transmitted to the control device 100 as a signal. And Then, as shown in FIG. 13, when the inclination sensor 250 detects an inclination greater than a first predetermined angle (for example, 15 to 20 degrees) continuously for a predetermined time (for example, 1 to 1.5 seconds), the traveling vehicle body 2 Is judged to be significantly inclined in the left-right direction. At this time, the control device 100 activates the notification device 251 such as the lamp 251a and the buzzer 251b, and makes the driver recognize that the vehicle is in a significant left-right tilt state.

  In addition, as shown in FIG. 13, the control device 100 operates the speed change lever 24 detected by the lever potentiometer 24a when the tilt sensor 250 detects a tilt of a second predetermined angle (eg, 10 to 15 degrees). The configuration is such that the output control motor 23a is actuated to reduce the output of the HST 23 while ignoring the angle, and the output of the HST 23 is reduced.

  As a result, when the traveling vehicle body 2 tilts to a certain extent in the left-right direction, the output of the HST 23 automatically decreases and the traveling speed decreases, so that the operator recognizes that the traveling vehicle body 2 is tilting in the left-right direction. Therefore, the safety of work and the running performance near the entrance / exit are improved.

  Further, since the traveling speed decreases, it takes a long time to reach the position where the lateral inclination of the traveling vehicle body 2 can be increased. Therefore, the operator does not tilt the traveling vehicle body 2 by operating the handle 34 or the shift lever 24. It is possible to return to the state, and the safety of work is further improved.

  As shown in FIG. 1, the tilt sensor 250 is located at the center in the left-right direction of the main frame 15 of the traveling vehicle body 2 and on the rear side of the fuselage, more specifically, the left and right rear wheel transmission cases 18, 18. At the center in the left-right direction, and between the engine 20 and the link base frame 42. The left and right rear wheel transmission cases 18, 18 are fixed to the left and right sides of the main frame 15, and the vertical positions of the left and right rear wheels 11, 11 and the left and right rear wheel transmission cases 18, 18 such as a suspension and a rotation mechanism. Therefore, the left and right rear wheels 11 and 11 are easy to receive the ground condition directly, and excess detection information is not mixed with the left and right inclination angle of the traveling vehicle body 2 detected by the inclination sensor 250. .

  As a result, it is possible to prevent the output reduction of the HST 23 and the operation of the notification device 251 from actually occurring without being tilted, that is, under unnecessary conditions, and thus preventing the running state from being corrected or stopped. Work efficiency is improved.

  In addition to the above, as shown in FIGS. 1 and 8, a link sensor 212 that detects the rotation angle of the upper link 40 is provided at the base of the upper link 40 of the elevating link mechanism 3. Therefore, the vertical position of the direct seeding device 82 can be determined.

  Then, as shown in FIG. 14, when the tilt sensor 250 detects the tilt of the second predetermined angle over a predetermined time (eg, 1 to 1.5 seconds), the control device 100 controls the switching of the hydraulic valve to switch the hydraulic valve. The elevating cylinder 46 is extended, and the elevating link mechanism 3 is lowered and rotated to a position where the distance from the sowing float 55 to the field scene is about 300 mm. In addition to this, when the inclination sensor 250 detects the inclination of the first predetermined angle, the control device 100 extends the elevating cylinder 46 until the sowing float 55 comes in contact and rotates the elevating link mechanism 3 downward.

  When entering / leaving from the field, the lower part of the direct sowing device 82, in particular, the sowing float 55 is contacted with the ground and damaged, or the lifting link mechanism 3 is pivoted significantly upward to prevent running resistance. Since the direct seeding device 82 is compared upward, the center of gravity is closer to the upper side, and the stability of the traveling vehicle body 2 is reduced. However, when the traveling vehicle body 2 is leaning greatly in the left-right direction, the direct seeding device 82 is automatically moved downward to lower the center of gravity, thereby eliminating the disturbance of the posture of the traveling vehicle body 2 and reducing the right-left inclination. The running posture can be stabilized, and the work efficiency and safety can be improved.

2 Traveling body 11 Rear wheel (traveling wheel)
59 Seeding cover plate (seeding cover member)
62 Sowing frame 66 Soil covering adjustment motor (soil covering switching member)
82 Direct seeding equipment (seeding equipment)
100 Control device 203b Approaching wheel (soil detector)
204b Second sensor arm (detection arm)
205 Potentiometer (movement amount detection member)
206 Soil hardness / softness sensor (hardness / softness detection member)
208 Soil cover adjustment dial (Soil cover adjustment member)
209 Lifting spring (biasing member)
1st stage of N1 “standard” position (the other end of the hard / soft setting position)
N2 Second stage of “standard” position (hard / soft setting position)
N3 Third stage of “standard” position (hard / soft setting position)
4th stage of N4 “standard” position (hard / soft setting position)
H1 "Carbide" position 1st stage (predetermined position)
H2 2nd stage of “Carbide” position (predetermined position)
H3 3rd stage of “Carbide” position (one side end of hard / soft setting position)

Claims (7)

A seeding device (82) for supplying seeds to the traveling vehicle body (2), a hardness / softness detection device (206) for detecting the hardness of the field, and a seeding covering soil for burying seeds supplied by the seeding device (82) to the field A member (59) is provided, and a soil covering switching member (66) for changing the soil covering posture of the sowing covering soil member (59) upon detection of the hardness / softness detecting member (206) is provided, and the soil covering switching member (66) is operated. In the sowing machine provided with the soil covering adjustment member (208) for changing the setting of the detection device (206) and the control device (100) for controlling the operation of the soil covering switching member (66),
When the soil covering adjustment member (208) is operated to a predetermined hardness / soft setting position, the control device (100) changes the soil covering width of the seeding covering member (59) and moves the seeding covering member (59). A seeder characterized by limiting the range. The hardness / softness detection device (206) includes a soil detection body (203b) that moves due to the hardness of the field, and a movement amount detection member (205) that detects the movement amount of the soil detection body (203b).
When the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard / soft setting position, the control device (100) moves the seeding covering soil member (59) to the side where the soil covering width increases. The position after the movement of the sowing covering member (59) is fixed as a reference position, and the movement of the sowing covering member (59) to the side where the covering width becomes narrower than the reference position is regulated. The seeder according to claim 1. The hardness / softness detection device (206) includes a soil detection body (203b) that moves due to the hardness of the field, and a movement amount detection member (205) that detects the movement amount of the soil detection body (203b).
When the soil covering adjustment member (208) is operated to the predetermined positions (H1, H2) of the hard and soft setting positions, the control device (100) moves the seeding covering soil member (59) to the side where the soil covering width is narrowed. The position after movement of the sowing covering member (59) is fixed as a reference position, and the movement of the sowing covering member (59) to the side where the covering width becomes wider than the reference position is regulated. The seeder according to claim 1.   When the control device (100) operates the soil covering adjustment member (208) to one side end (H3) of the hardness / soft setting position, the sowing soil covering member (59) regardless of the detection of the hardness / softness detection member (206). 4. The seeder according to claim 2, wherein the movement of the seeder is restricted.   The soil covering width of the sowing soil covering member (59) is maximized or minimized by operating the soil covering adjusting member (208) to one side end (H3) of the hard / soft setting position. Sowing machine.   When the control device (100) operates the soil covering adjustment member (208) within a predetermined hardness setting position (N2, N3, N4) from the other end (N1) of the hardness setting position, The seeding machine according to any one of claims 1 to 5, wherein the soil covering width of the sowing soil covering member (59) is changed based on the detection of the hardness / softness detecting member (206).   The sowing frame (62) of the sowing device (82) is provided with a detection arm (204b) mounted with the soil detection body (203b) so as to be rotatable up and down, and biasing the biasing of the detection arm (204b) upward. The seeder according to any one of claims 2 to 5, wherein the member (209) is detachably provided on the seeding frame (62) and the detection arm (204b).

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