JP5824692B2 - Seeding machine - Google Patents

Description

  In the present invention, a front wheel and a rear wheel are arranged on the front and rear of the body frame, and a seeding unit including a seeding device and a grooved tool is arranged in the left-right direction between the front wheel and the rear wheel, and is bundled in a plurality of lines. In particular, the present invention relates to a configuration for adjusting the depth of a seeding groove formed by a groove producing tool (hereinafter referred to as “seeding depth”).

  Conventionally, in a machine frame that supports the front and rear wheels, a seeding unit that includes a seeding device and a grooved tool is provided for each line. A technique (for example, see Patent Document 1) that provides a thickness adjusting mechanism and adjusts the sowing depth by a groove producing tool is known. In the seeding depth adjustment mechanism, for example, a cylinder having an axial center in the vertical direction is fixed on the body frame side, and the upper part of the pole having the lower end connected to the groove forming tool can be slid up and down in the cylinder. And the lower end of the groove producing tool is set to a predetermined depth by fixing the pole with the tip of a bolt screwed into the cylindrical body.

JP 2006-345733 A

  However, in the above technique, since an adjusting mechanism is provided for each grooving tool, if the number of corresponding seeds of the seeding machine increases, the labor and time required for the sowing depth adjustment work increase, and the workability of the sowing work deteriorates. There was a problem.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
In claim 1, a front wheel and a rear wheel are arranged before and after the body frame, and a plurality of sowing units provided with a seeding device and a groove producing tool are arranged in the left-right direction between the front wheel and the rear wheel, In a sowing machine that performs sowing in a lump collectively, a sowing depth adjusting mechanism capable of simultaneously tilting all sowing units is provided for at least a part of the airframe frame, and the sowing depth adjusting mechanism includes the airframe. The frame is divided into a front frame for supporting the front wheel and a rear frame for supporting the rear wheel, and the rear frame and the front frame are connected to each other so that the rear frame and the front frame can be bent vertically. A depth adjuster capable of changing a distance between the front frame and the rear frame at a position separated from the connection shaft is provided .
In claim 2, by supporting all sowing units only on one of the front frame or the rear frame, the bending angle formed by the front frame and the rear frame is changed, and all the sowing units are tilted simultaneously. It is possible .
According to a third aspect of the present invention, the connecting shaft is interposed between an end portion of one of the front frame and the rear frame and a middle portion of the other frame .
In Claim 4, Between the said seeding apparatus and the delivery base which attaches the feeding part of this seeding apparatus to the said body frame, the attachment of the feeding part to this feeding base and the power of the feeding part to a power transmission path A seeding device attaching / detaching structure for performing a first operation for simultaneous connection or a first operation for simultaneous removal of the feeding portion from the feeding base and power cutting of the feeding portion from the power transmission path is provided. is there.
According to claim 5, in the seeding device attachment / detachment structure, the feeding unit side includes a driven gear fitted to a feeding shaft that drives the seeding device, and a plurality of locking portions, and on the feeding base side, A drive gear that meshes with the driven gear in an attached state, and a clamping body that clamps the locking portion.

Since this invention was comprised as mentioned above, there exists an effect shown below.
That is, according to claim 1, the grooving tools provided in all the sowing units can be tilted at the same time, so that the sowing depth can be changed at once, and the sowing depth can be increased even if the number of corresponding seeds of the sowing machine increases. The adjustment work does not take time and effort, and the workability of the sowing work does not deteriorate.
In addition, the seeding depth adjusting mechanism divides the fuselage frame into a front frame for supporting the front wheel and a rear frame for supporting the rear wheel, the rear frame and the front frame having a connecting shaft. It has a depth adjuster that can be bent up and down around the center and can change the distance between the front and rear frames at a position away from the connecting shaft. By providing a tool, the length of the arm can be increased to increase the moment, and the depth adjusting tool can be expanded and contracted with a small operating force to reduce the work load of the sowing depth adjusting work. .
According to claim 2, by supporting all the sowing units only on one of the front frame or the rear frame, the bending angle formed by the front frame and the rear frame can be changed, and all the sowing units can be tilted simultaneously. since the respective Sakumizogu without through the sowing depth adjustment mechanism composed of a plurality of parts, with respect to the machine frame directly or via a single member can be firmly connected, Even if the condition of the soil and the grooving tool is bad and the resistance received from the soil increases or becomes uneven, the grooving tool will not shift or vibrate, and sowing depth accuracy will decrease. Can be prevented.
According to claim 3 , since the connecting shaft is interposed between an end portion of one of the front frame and the rear frame and a middle portion of the other frame, the middle portion of the one frame and the other frame The bending angle can be changed with a simple configuration in which a depth adjuster is provided between the ends of the frame, and the cost of components and the improvement of assembly can be improved.
According to the fourth aspect, in the seeding device attaching / detaching structure, all the seeding devices provided in the seeder can be attached / detached in a short time, and the maintainability is improved.
According to the fifth aspect, the seeding device attaching / detaching structure can be provided with a simple configuration, and the cost of parts can be reduced and the assembling property can be improved.

It is a side view which shows the whole seeder's structure concerning this invention. It is also a plan view. It is a side view of a depth adjuster. FIG. 4 (a) is an explanatory view of the sowing depth adjustment work using the depth adjuster, and FIG. 4 (a) is an explanatory view showing the sowing depth of the sowing machine in which the front half of the rear frame is held substantially horizontally, FIG. (B) is explanatory drawing which shows the seeding depth of the seeder which inclined the front half part of the rear frame forward. FIGS. 5A and 5B are views showing a feeding base in which the cropping nails are fixed, in which FIG. 5A is a plan view and FIG. 5B is a side view. It is explanatory drawing of 1st operation with attachment of a seeding apparatus using a seeding apparatus attachment / detachment structure, and power connection. It is a side view which shows the state which attached the sowing apparatus to the feeding base which fixed the cropping nail | claw. It is explanatory drawing of a low position support structure.

  Hereinafter, embodiments of the present invention will be described in detail. The direction indicated by the arrow F in FIG. 1 is the forward direction of the seeder 1, and the positions and directions of the members described below are based on this forward direction.

  First, the entire configuration of the walking type seeder 1 according to the present invention will be described with reference to FIGS. 1 and 2. The seeder 1 is provided with a pair of left and right body frames 2 and 3, and in the left body frame 2, the front frame 2 a and the rear frame 2 b can be bent up and down around the connecting shaft 4 </ b> L. Similarly, also in the right body frame 3, the front frame 3a and the rear frame 3b are connected so that they can be bent up and down around the connecting shaft 4R. The roller shaft 7 of the front roller 5 is supported between the front portions of the left and right front frames 2a and 3a, while the roller shaft 8 of the pressure reducing roller 6 is supported between the rear portions of the left and right rear frames 2b and 3b. Is supported.

  Further, between the front half portions of the left and right rear frames 2b and 3b, support bars 11 and 12 are laid across the front and rear, and the front and rear ends of the feeding base 13 are supported by the support bars 11 and 12, respectively. On the upper surface of the feeding base 13, a seeding device 14 having a feeding portion 14 a at the lower portion is mounted. On the lower surface of the feeding base 13, a cropping claw 15 that supports a cover plate 16 is fixed on the rear side. A seeding unit 17 is configured for each strip from the seeding device 14, the feeding base 13, the cropping claws 15, the cover plate 16, and the like. In the present embodiment, four seeding units 17 are arranged in the left-right direction at substantially equal intervals, and a seeding unit 9 is formed from the four seeding units 17.

  An operation unit 10 is disposed between the rear portions of the rear frames 2b and 3b behind the seeding unit 9. In the operation portion 10, left and right vertical arm portions 36b and 36b are erected substantially vertically upward from the rear frames 2b and 3b behind the roller shaft 8, and the vertical arm portion 36b. -The upper end of 36b is connected by the horizontal arm part 36a, and the lower arm member 36 is formed.

  Further, the vertical arm portions 35b and 35b are inserted from above into the pipe-shaped vertical arm portions 36b and 36b whose upper ends are opened, and the grip arm portion 35a is provided between the upper ends of the vertical arm portions 35b and 35b. The upper arm member 35 is connected to each other, and the upper arm member 35 and the lower arm member 36 constitute a front-view portal handle arm 34 that is erected substantially vertically upward.

  Bolts 43 and 43 are screwed into the front end portions of the vertical arm portions 36b and 36b of the lower arm member 36 from the front, and as the bolts 43 and 43 are screwed, the bolts 43 and 43 are inserted. The upper arm member 35 is fastened and fixed to the lower arm member 36 by pressing the rear end against the front surface of the vertical arm portions 35 b and 35 b of the upper arm member 35.

  As a result, the bolt 43 is loosened, the upper arm member 35 is slid along the lower arm member 36 and moved up and down, and then the bolt 43 is tightened again to bring the handle arm 34 to a predetermined height. It is adjustable.

  A pair of left and right stays 41 and 41 project forward from the upper and lower middle portions of the vertical arm portions 36b and 36b, and screw holes (not shown) are opened at the front ends of the stays 41 and 41, respectively. Nuts 42a and 42a are fixed on the outer surface coaxially with the screw holes. On the other hand, a pair of left and right protrusions 2b1 and 3b1 project upward from the rear frames 2b and 3b in front of the roller shaft 8, and handle tilt adjustment frames 40 and 40 are provided at the upper ends of the protrusions 2b1 and 3b1. The lower ends of the two are connected so as to be pivotable back and forth. Long holes 40a and 40a are provided at the upper ends of the handle tilt adjustment frames 40 and 40, and bolts 42b and 42b are inserted into the nut 42a from the inside so as to pass through the long holes 40a and 40a. It is tightened.

  As a result, the bolts 42b and 42b are loosened and slid along the long holes 40a and 40a, the vertical arm portions 36b and 36b are tilted in the front-rear direction, and then the bolts 42 and 42 are tightened again to thereby fix the handle arm 34. Can be adjusted to a predetermined tilt angle.

  As described above, the front and rear inclination angle and height of the handle arm 34 are changed steplessly, and during the sowing operation, the handle arm 34 is grasped by the grasping arm portion 35a and is manually pushed forward. The pushing operation can be performed with a small amount of human power, reducing the work load of the sowing work and improving the workability.

  In addition, a depth adjuster 26 according to the present invention is disposed in front of the sowing unit 9 and between the front frames 2a and 3a and the rear frames 2b and 3b. A sowing depth adjusting mechanism 64, which will be described later, is configured together with the body frames 2 and 3 that can be bent up and down in the middle.

  In addition, an input shaft 23 is rotatably mounted between the support bars 11 and 12 between the front portions of the rear frames 2b and 3b. It is connected to the feeding shaft 24 of the seeding device 14 via a transmission path in the structure 27. The right end of the input shaft 23 is connected to the roller shaft 8 of the pressure reducing roller 6 via the power transmission path 18.

  In the power transmission path 18, a transmission case 19 is fixed to the outer surface of the front and rear center part of the right rear frame 3 b, the right end of the input shaft 23 is inserted into the front part of the transmission case 19, and a sprocket is connected to the right end. 21 is fitted and fixed. Similarly, the right end of the roller shaft 8 is inserted into the rear portion of the transmission case 19, and a sprocket 20 is fitted and fixed to the right end. A chain 22 is formed between the sprocket 20 and the sprocket 21. It is wound.

  Thereby, when the seeding machine 1 proceeds, the pressure reducing roller 6 rotates, and the rotational power of the pressure reducing roller 6 is transmitted from the roller shaft 8, the sprocket 20, the chain 22, and the sprocket 21 to the input shaft 23, and the seeding device 14 The feeding shaft 24 is driven so that seeds are fed to the field.

  In the front roller 5, a pair of left and right support frames 28L and 28R are erected from the vicinity of the support portion of the roller shaft 7 at the front portion of the front frames 2a and 3a, and between the upper end portions of the support frames 28L and 28R. In addition, a mounting table 29 is provided horizontally, and a plan view gate-shaped handle 51 for carrying is projected forward from the lower surface of the mounting table 29. Further, a front scraper 38 for removing mud protrudes toward the front outer peripheral surface of the front roller 5 between the left and right front frames 2a and 3a in front of the front roller 5, and similarly, the pressure reducing roller 6 A rear scraper 39 for removing mud also protrudes toward the rear outer peripheral surface of the pressure reducing roller 6 between the rear frames 2b and 3b at the rear.

  Next, the seeding depth adjusting mechanism 64 will be described with reference to FIGS. As shown in FIGS. 1 and 2, the seeding depth adjusting mechanism 64 is configured by the bendable body frame 2 and 3 and the depth adjusting tool 26 as described above.

  Here, at the rear portion of the left and right front frames 2a and 3a, left and right bent portions 2a1 and 3a1 are bent upwardly between the roller shaft 7 and the connecting shafts 4L and 4R. A front support shaft 62 is horizontally mounted between the portions 2a1 and 3a1, and a rear support shaft 63 is horizontally mounted between the front end portions of the left and right rear frames 2b and 3b. The depth adjuster 26 is interposed between the substantially right and left central portions of the rear support shaft 63 and the substantially right and left central portions of the front support shaft 62.

  As shown in FIG. 3, the depth adjuster 26 has a block-shaped first connecting member 57 into which the front support shaft 62 is inserted into a lateral hole 57a drilled in the front half portion, and a lower end portion. A pipe-like second connecting member 58 into which the rear support shaft 63 is fitted into a lateral hole 58a, and an adjustment handle 56 interposed between the second connecting member 58 and the first connecting member 57. Is done.

  The adjustment handle 56 includes an L-shaped handle portion 56a in side view and a shaft portion 56b that is suspended from the inner end of the handle portion 56a. The shaft portion 56b penetrates from above the vertical hole 57b drilled in the rear half of the first connecting member 57, and the vertical center of the shaft portion 56b cannot be moved up and down and rotated in the vertical hole 57b. It tries to be supported as possible. Further, the lower end of the shaft portion 56b extends from a nut 59 fixed to the upper surface of the second connecting member 58 to a vertical screw hole 58b screwed into the upper half of the same second connecting member 58. It is inserted.

  With such a configuration, the handle portion 56a having an L shape in side view of the adjustment handle 56 is gripped and rotated, and the tip end of the shaft portion 56b is screwed in the vertical direction from the nut 59 to the vertical screw hole 58b. By extending and contracting the interval 65 between the first connecting member 57 and the second connecting member 58, the support shafts 62 and 63 can be opened and closed about the connecting shafts 4L and 4R in the vertical direction.

  Here, a scale 60 is fastened by a bolt 61 to the rear surface of the first connecting member 57, and a scale 60 a carved on the lower half of the scale 60 is provided on the upper part of the second connecting member 58. By reading the position of the reference line 58c, the seeding depth is a guide. A spring pin 105 is projected in a radial direction at a position above the first connecting member 57 in the shaft portion 56 b of the adjustment handle 56, and the rotated spring pin 105 is the upper half of the scale 60. The adjustment handle 56 can be prevented from rotating by contacting the leaf spring portion 60b.

  Further, the support shafts 62 and 63 are disposed sufficiently apart from the connection shafts 4L and 4R, and the length of the arm is increased to increase the moment with the connection shafts 4L and 4R as fulcrums. Therefore, the human power required for the rotation of the handle portion 56a is small, and the work load of the sowing depth adjustment work is reduced.

  Subsequently, a sowing depth adjustment procedure using the depth adjuster 26 having such a stretchable structure will be described. As shown in FIG. 4A, in the state where the adjustment handle 56 of the depth adjuster 26 is rotated and the distance between the connecting members 57 and 58 is set to the interval 65, the front frames 2a and 3a are centered on the connecting shaft 4L. An angle formed by the rear portion and the front portions of the rear frames 2b and 3b (hereinafter referred to as “bending angle”) is an angle 67. At this time, the front half portions of the rear frames 2b and 3b are held substantially horizontally, and in all the sowing units 17 in this horizontal posture, the lower end position of the cropping claws 15 from the field scene 110 corresponding to the sowing depth. The depth up to the position 71 is set to the depth 69.

  In this embodiment, the center angle when the connecting shafts 4L and 4R are the radii from the connecting shafts 4L and 4R to the support shafts 62 and 63 is the bending angle in the side view. The angle is not particularly limited as long as the angle indicates the degree of bending with the rear frame.

  As shown in FIG. 4B, when the adjustment handle 56 is further rotated and the connection members 57 and 58 are extended from the interval 65 to the interval 66, the bending angle increases from the angle 67 to the angle 68, The front half of the frames 2b and 3b is inclined forward and downward. Accordingly, in all the sowing units 17, the cropping claws 15 are also inclined forward and downward, the lower end position thereof is changed from the position 71 to the position 72, and the seeding depth is deep from the depth 69 to the depth 70. Thus, the sowing depth adjustment work of all the sowing units 17 is completed.

  Therefore, when it is necessary to change the sowing depth according to the machine vibration, the state change of the field, the cultivation conditions, etc. accompanying the work, all the sowing is performed by using such a sowing depth adjusting mechanism 64. The seeding depth in the unit 17 can be set to an appropriate value collectively.

  That is, a front roller 5 that is a front wheel and a pressure roller 6 that is a rear wheel are arranged before and after the body frame 2, 3, and a seeding device 14 and a groove forming tool are disposed between the front roller 5 and the pressure roller 6. In a sowing machine 1 in which seeding units 17 having strip claws 15 are arranged in the left-right direction and sowed in a plurality of strips at once, with respect to the front frames 2a and 3a that are at least a part of the body frames 2 and 3 Since the sowing depth adjustment mechanism 64 that can tilt all the sowing units 17 at the same time is provided, the rowing claws 15 provided in all the sowing units 17 are tilted at the same time, and the depths 69 and 70 that are the sowing depths are set. Even if the number of corresponding seeds of the seeding machine 1 is increased, the sowing depth adjustment work does not take time and effort, and the workability of the sowing work does not deteriorate.

  Further, the fuselage frames 2 and 3 are divided into front and rear frames 2a and 3a for supporting the front roller 5 and rear frames 2b and 3b for supporting the pressure-reducing roller 6, and the rear frames 2b and 3b and The front frames 2a and 3a are connected so that they can be bent up and down around the connection shafts 4L and 4R, and all the sowing units 17 are supported by only one of the front frames 2a and 3a or the rear frames 2b and 3b. By changing the angles 67 and 68, which are bending angles formed by the front frames 2a and 3a and the rear frames 2b and 3b, all the sowing units 17 can be tilted at the same time. Is firmly connected to the airframes 2 and 3 directly or via the feeding base 13 which is a single member without using a sowing depth adjustment mechanism composed of a plurality of parts. Even if the condition of the soil or the cropping nails 15 is poor and the resistance received from the soil is increased or non-uniform, the cropping nails 15 will not shift or vibrate. It is possible to prevent a decrease in the sowing depth accuracy.

  In addition, the connecting shafts 4L and 4R are interposed between an end portion of one of the front frames 2a and 3a and the rear frames 2b and 3b and a middle portion of the other frame, and the connecting shaft Since the depth adjuster 26 that can change the distance between the front frames 2a and 3a and the rear frames 2b and 3b at a position spaced from the 4L and 4R is provided, the middle part of one frame and the end part of the other frame With a simple configuration in which the depth adjuster 26 is provided between them, the angles 67 and 68, which are bending angles, can be changed, and parts cost can be reduced and assembly can be improved. Moreover, by providing the depth adjuster 26 apart from the connecting shafts 4L and 4R as the fulcrum, the arm length can be increased to increase the moment, and the depth adjuster can be expanded and contracted with a small operating force. Thus, the work load of the sowing depth adjustment work can be reduced.

  Next, the seeding device attaching / detaching structure 27 will be described with reference to FIGS. 1 and 5 to 7. The seeding device attaching / detaching structure 27 enables the attachment and power connection of the feeding part 14a of the seeding device 14 and the power connection or removal and power cutting to the feeding base 13 to which the cropping claws 15 are fixed. Is.

  Here, as shown in FIG. 6, the seeding device 14 inserts a feeding roll 74 into the lower opening of the seed case 73 whose upper and lower sides are opened obliquely from below and then covers the lower feeding case 91 thereafter. Configured.

  Among these, the said seed case 73 is comprised from the hopper part 73a which stores the seed 93 inside so that the upper surface may be covered with the cover body 92, and the upper extension case part 73b below this hopper part 73a, The feeding portion 14a for feeding the seed 93 by a predetermined amount is formed from the upper feeding case portion 73b and the lower feeding case 91. A pair of left and right first locking projections 14b and 14b are provided at the front lower end of the feeding portion 14a so as to protrude outwardly from the left and right, while a second locking portion is provided at the rear lower end of the feeding portion 14a. The protrusion 14c protrudes rearward.

  In the feeding roll 74, a shaft hole 74b is drilled in the left-right direction, and the shaft hole 74b is disposed on substantially the same axis as the through-hole 73c drilled in the left-right direction at the bottom of the seed case 73. The feeding shaft 24 is rotatably inserted into the through hole 73c and is non-rotatably fitted into the shaft hole 74b. One end of the feeding shaft 24 protrudes leftward from the inside of the seed case 73, and a driven gear 75 is fitted and fixed to the end thereof. Further, recesses 74a are formed at substantially equal intervals in the circumferential direction on the outer peripheral surface of the feeding roll 74, and the seeds 93 enter the recesses 74a.

  As a result, when the feeding roll 74 rotates in the direction of the arrow 94, the seed 93 entering the recess 74a from the hopper 73a is rotated and conveyed while being held in the recess 74a. During this conveyance, seeds 93 and the like overflowing from the recess 74a are removed by a brush (not shown). Then, when the seed 93 in the concave portion 74a is conveyed to a predetermined dropping position, the seed 93 is dropped into the feeding base 13 from the feeding port 91a opened at the lower portion of the lower feeding case 91.

  As shown in FIG. 5, the feeding base 13 includes a bottom plate 76 having a rear U-shaped cutout 76 a opened rearward, and a pair of left and right erected from the left and right side edges of the bottom plate 76. The side plates 77 and 78, and a gear case 79 fastened and fixed by a plurality of bolts 88 provided in front of and behind the left outer surface of the left side plate 77, and the like.

  In the side plates 77 and 78, a pipe-like mounting boss portion 87 having an axial center in the left-right direction is provided between the front portions thereof, and the front support bar 11 is inserted into the mounting boss portion 87. Then, the front portions of the side plates 77 and 78 are connected and fixed to the front support bar 11 by being fixed with the knob screw 86. On the other hand, the rear edges of the side plates 77 and 78 are formed with recesses 77a and 78a that are opened rearward. By inserting the rear support bar 12 into the recesses 77a and 78a, the side plates 77 and 78 are inserted. The rear part is connected and fixed to the rear support bar 12. Accordingly, the feeding base 13 can be supported and fixed to the rear frames 2b and 3b via the front and rear support bars 11 and 12.

  Further, the side plates 77 and 78 are fixed to the inner side surface of the front half part by sticking and fixing the side clamping plates 83 and 83 which are convex downward in a side view, and the side plates 77 and 78 are attached to the inner side surface of the rear half part. The upper clamping plate 81 is stuck and fixed via a U-shaped fixing part 81a opened rearward in plan view.

  In the bottom plate 76, a rectangular communication hole 76b is opened at the front and rear substantially center thereof, and the upper surface 76c of the bottom plate 76 in front of the communication hole 76b and the outer peripheral slopes of the front lower portions of the side clamping plates 83 and 83 are provided. A front clamping space 89 is provided between the surfaces 83a and 83a.

  Further, the rear end of the bottom plate 76 is fixedly provided with a rear end of a Y-shaped lower holding plate 80 opened rearward in a plan view, and the front portion of the lower holding plate 80 faces obliquely upward in the front direction. After reaching the bottom of the upper horizontal portion 81b formed substantially horizontally, the lower horizontal portion 80a is returned to the horizontal again. A rear clamping space 90 is provided between the lower horizontal portion 80a and the upper horizontal portion 81b. The upper horizontal portion 81b protrudes forward from the upper end of the fixing portion 81a in the upper holding plate 81, and its left and right ends are bent downward so as to cover the rear holding space 90 from both the left and right sides. ing.

  In the gear case 79, the left side surface bulges to the left, and the upper part thereof opens upward except for the rear end, and is a driven gear 75 disposed on the left outer side of the seeding device 14. However, it can be inserted into the gear case 79 from above through the upper opening 79a.

  Further, a driving gear 82 is accommodated in the inner end of the rear end portion whose upper portion is closed by the gear case 79, and the driving gear 82 can mesh with the driven gear 75 in the gear case 79. In FIG. 3, the input shaft 23 is externally fitted and fixed.

  Then, the attachment / detachment procedure of the seeding device 14 to the feeding base 13 in the above configuration will be described. As shown in FIG. 6, the seeding device 14 is moved in the direction of the arrow 96, and the left and right first locking projections 14 b and 14 b are laterally clamped between the left and right side plates 77 and 78 of the feeding base 13. Insert into the space ahead of the plates 83 and 83.

  Then, the first locking protrusions 14b and 14b are moved horizontally in the direction of the arrow 97 as they are, whereby the first locking protrusions 14b and 14b on the feeding part 14a side are respectively moved to the front clamping space 89 on the feeding base 13 side. -While fitting in 89, the 2nd latching protrusion 14c by the side of the delivery part 14a can also be made to fit in the rear clamping space 90 in the side of the delivery base 13 side. Thereby, as shown in FIG. 7, the feeding part 14a of the seeding device 14 is supported and fixed to the feeding base 13 before and after that. At this time, a hole (not shown) is formed in the second locking protrusion 14c in the vertical direction, and a not-shown protrusion provided on the upper surface of the lower horizontal portion 80a of the lower holding plate 80 in the hole. Is engaged from below by the elastic force of the lower clamping plate 80. In addition, when performing the removal operation | work of the sowing apparatus 14, a convex part can be easily attached or detached from a hole by pushing down the downward clamping board 80. FIG.

  At the same time, the driven gear 75 on the feeding portion 14 a side is inserted into the gear case 79 and meshed with the drive gear 82 in the gear case 79. Thereby, the rotational power from the pressure reducing roller 6 transmitted to the input shaft 23 via the power transmission path 18 shown in FIG. 1 passes through the transmission path composed of the small diameter drive gear 82 and the large diameter driven gear 75. Then, it is transmitted to the feeding shaft 24.

  In this way, the first operation of simultaneously attaching the feeding portion 14a to the feeding base 13 and connecting the power of the feeding portion 14a to the power transmission path 18 is possible. The second operation of simultaneously removing the feeding portion 14a from the feeding base 13 and power cutting the feeding portion 14a from the power transmission path 18 can be performed by reversing the above-described procedure.

  Since the lower clamping plate 80 that presses the second locking projection 14c from below is made of an elastic member such as a leaf spring, the second locking projection 14c fits into the rear clamping space 90 and is clamped downward. When the height of the lower horizontal portion 80a of the body 80 is lowered from the position 98 to the position 99, an upward biasing force is generated in the lower clamping plate 80 due to the lowering, and the second locking projection 14c is generated by the biasing force. Can be held in a constantly energized state, and the holding effect of the second locking projection 14c is enhanced.

  That is, the attachment of the feeding portion 14a to the feeding base 13 and the power transmission path 18 between the seeding device 14 and the feeding base 13 for attaching the feeding portion 14a of the sowing device 14 to the body frame 2/3. A first operation for simultaneously connecting the power of the feeding portion 14a to the power supply or a second operation for simultaneously removing the feeding portion 14a from the feeding base 13 and cutting the power of the feeding portion 14a from the power transmission path 18 is performed. Since the seeding device attaching / detaching structure 27 is interposed, all the seeding devices 14 provided in the seeder 1 can be attached and detached in a short time by the seeding device attaching / detaching structure 27, and the maintainability is improved. In addition, with this seeding device attaching / detaching structure 27, the seeding device 14 can be quickly attached even in a single-row seeding machine.

  Further, in the seeding device attaching / detaching structure 27, on the feeding portion 14a side, a driven gear 75 that fits the feeding shaft 24 that drives the seeding device 14 and a first locking protrusion 14b that is a plurality of locking portions. 14b and a second locking projection 14c, and on the feeding base 13 side, a drive gear 82 that meshes with the driven gear 75 in the attached state, the first locking projections 14b and 14b, and the second engagement Since the side clamping plates 83 and 83, the lower clamping plate 80, and the upper clamping plate 81, which are clamping bodies that clamp the stop protrusion 14c, are provided, the seeding device attaching / detaching structure 27 can be provided with a simple configuration, and the component cost is reduced. Can be reduced and assembly can be improved.

  Next, regarding the low position support structure 116 in which the height can be set to a low position in advance in the seeding device 14 that feeds the seed 93 in a state of being attached to the body frame 2 or 3 as described above, FIGS. This will be described with reference to FIGS. Since the left and right aircraft frames 2 and 3 have substantially the same structure, the left aircraft frame 2 will be described, and the description of the right aircraft frame 3 will be omitted.

  As shown in FIGS. 1, 2, and 8, in the low position support structure 116, the rear frame 2 b extends rearward substantially horizontally from a support portion 2 b 2 that supports the pressure reducing roller 6. 113, conversely, a forward inclined portion 112 that is inclined forward and obliquely downward toward the seeding device 14 from the support portion 2b2, and a front horizontal portion 111 that extends substantially horizontally forward from the front end of the forward inclined portion 112. Is done.

  Of these, the front support bar 11 and the rear support bar 12 are supported by the front horizontal part 111 and the front inclined part 112, respectively. The front and rear of the feeding base 13 on which the device 14 is mounted are locked.

  Therefore, compared to the case where the front support bar 11 and the rear support bar 12 are supported by the portion extending from the front inclined portion 112 to the rear horizontal portion 113, the seeding device 14 has a maximum front end of the front inclined portion 112. It is supported at a low position by the height difference 114 from the rear end.

  On the other hand, the front frame 2a is formed by bending a horizontal portion 115 that extends substantially horizontally in the front-rear direction from the support portion 2a2 that supports the front roller 5, and a convex shape upward from the rear end of the horizontal portion 115. And the bent portion 2a1. The rear end of the bent portion 2a1 is set to be substantially the same height as both the support portions 2a2 and 2b2. Therefore, the front frame 2a is not provided with an inclined portion that is inclined forward and obliquely downward from the support portion 2a2 toward the seeding device 14, like the forward inclined portion 112 of the rear frame 2b.

  A front projecting portion 2b3 projects upward from substantially the front and rear center of the front horizontal portion 111 of the rear frame 2b, and the connecting shaft 4L is provided at the projecting end. The rear end of the bent portion 2a1 is connected to the connecting shaft 4L. Are connected, and the front frame 2a and the front horizontal portion 111 that supports the seeding device 14 by the rear frame 2b are arranged so as to be spaced apart in two upper and lower stages. Thereby, the arrangement | positioning space of the said depth adjusting tool 26 can be expanded to an up-down direction, and the improvement of the assembly property of the seeder 1 and a maintenance property can be aimed at.

  Further, in this way, together with the seeding device 14 supported in the vicinity of the field scene 110 by the low position support structure 116, the cropping claws 15 are also supported in the vicinity of the field scene 110. As shown in FIGS. 5 to 7, the grooving claw 15 has a V-shaped groove 15a projecting in a tapered shape downward in a front view, and is opened rearwardly in a bifurcated shape from the groove 15a. It comprises a pair of left and right side plate portions 15b and 15c. Here, the grooved portion 15a includes a front closed lower edge 15a1 in which a portion whose lower edge is closed (hereinafter referred to as “closed lower edge”) is inclined obliquely downward and rearward, and the front closed lower edge 15a1. The lower closing edge 15a2 has a smaller inclination angle, and the closing lower edges 15a1 and 15a2 are gradually cut into the field scene 110.

  Then, below the seeding device 14, the upper surface of the strip claw 15 is fixed to the lower surface of the bottom plate 76 of the feeding base 13, and the right and left side plates are directly below the communication hole 76 b of the bottom plate 76. A space between the portions 15b and 15c is disposed, and the communication hole 76b is communicated with the sowing groove through the grooving claw 15. Thereby, the seed 93 drawn out from the sowing apparatus 14 can reach the sowing groove at the shortest distance from the communication hole 76b.

  Further, the lower surface of the feeding portion 14a is placed on the bottom plate 76 of the feeding base 13, and the feeding outlet 91a of the feeding portion 14a is disposed close to the communication hole 76b so as to face each other. Has been. Thereby, the seed 93 fed out from the seeding device 14 can reach the communication hole 76b as it is from the feeding port 91a without using a guide member such as a cylinder.

  Accordingly, almost only the cropping claw 15 is interposed between the feeding outlet 91a of the seeding device 14 and the sowing groove, and the fall distance from the feeding outlet 91a to the sowing groove is determined by the upper and lower thicknesses of the casting claw 15. It can be reduced to just that.

  Further, the space from the outlet 91 a to the communication hole 76 b is covered with a pair of left and right side plates 77 and 78 of the extension base 13. Thus, the seed 93 is prevented from being scattered by the crosswind or mud blown from the outside while passing through the communication hole 76b from the outlet 91a.

  In addition, as described above, the grooving claw 15 has a V-shaped groove 15a that projects in a tapered shape downward in a front view. As a result, the sowing groove formed by the groove forming portion 15a can also be formed in a V-shape, the bottom width of the sowing groove is made the same as the length of the feeding roll 74, and the inclination of the groove is made steep. It prevents rolling in the sowing groove from side to side.

  A support pin 85 is horizontally mounted on the rear portions of the side plate portions 15b and 15c, and the front end of the soil covering arm 95 is connected to the support pin 85 so as to be able to swing back and forth. The cover plate 16 is supported so as to be pivotable back and forth. An urging spring 84 wound around the support pin 85 is interposed between the side plate portions 15 b and 15 c and the soil covering arm 95, and the soil covering arm is caused by the elastic force of the urging spring 84. The covering board 16 supported by 95 is always biased downward.

  That is, in the sowing machine 1 provided with a sowing device 14 and a grooving claw 15 as a grooved tool on the machine frame 2, 3 that supports the front roller 5 that is the front wheel and the pressure-reducing roller 6 that is the rear wheel before and after, A low-position support structure 116 that supports the seeding device 14 at a low position is provided, and a communication hole 76b that is an opening that communicates with the seeding groove through the inside of the rowing claw 15 is provided immediately above the rowing claw 15. In addition, since the seed outlet 91a of the seed 93 from the seeding device 14 is arranged in the space immediately above the communication hole 76b, the seeding device 14 is supported in the vicinity of the field scene 110, and the seed outlet 91a of the seeding device 14 Only the rowing claw 15 is interposed between the seeding groove and the dropping distance from the feeding port 91a to the inside of the seeding groove can be greatly shortened. As a result, the reaction when the seed 93 collides with the sowing groove can be reduced, the rolling of the seed 93 to the periphery of the seed 93 due to the reaction can be prevented, and sowing work that requires high sowing accuracy such as spot sowing. It can respond enough. Furthermore, in addition to the prevention of seed rolling, a guide member between the feeding port 91a and the sowing groove is not required, and it is possible to reduce the component cost and improve the maintainability.

  Further, the low-position support structure 116 includes, from the support portions 2b2 and 3b2, out of the support portions 2a2 and 3a2 which are front wheel support portions and the support portions 2b2 and 3b2 which are rear wheel support portions. It has the front inclination part 112 which is an inclination part which inclines below toward the seeding apparatus 14, and the front horizontal part 111 connected to this front inclination part 112 substantially horizontally, and it connects with a part of this horizontal part 111 Since the seeding device 14 is supported by the front support bar 11, the seeding device 14 can be supported at a low position in the vicinity of the field scene 110 by simply changing the shape of the body frame 2 or 3 for low position support. There is no need to provide a separate member, and it is possible to further reduce the component cost and improve the maintainability.

  In addition, since the side plates 77 and 78 of the delivery base 13 are provided as side cover members from the delivery port 91a to the communication hole 76b that is an opening, the seed 93 falling from the delivery port 91a to the communication hole 76b blows from the outside. It can be prevented from being scattered by crosswind or mud, and a predetermined amount of seed 93 is reliably introduced into the sowing groove, so that the sowing accuracy is further improved.

  Further, the groove forming claw 15 which is the groove forming tool is provided with a groove forming portion 15a having a V-shape in front view provided with closed lower edges 15a1 and 15a2 extending obliquely downward and rearward in a side view. By making it V-shaped as viewed, the bottom of the seeding groove can be formed with a narrow width. This reliably prevents the seed 93 from rolling in the left-right direction in the sowing groove, and sowing accuracy is further improved. Further, since it is V-shaped when viewed from the front, the upper part of the groove portion 15a protrudes to the left and right, and extends obliquely downward and rearward in a side view, so that the closed lower edges 15a1 and 15a2 are in the farm scene 110. Since it cuts gradually, the discharged soil from the sowing groove is smoothly pushed out to the left and right without rising. This makes it possible to suppress the upward flow of soil associated with the groove formation as compared with the conventional groove producing device that forms the groove with the closed front edge extending obliquely upward rearward in a side view. The hole 76b is prevented from being blocked by the discharged soil, and the workability of the sowing work is improved.

  In addition, a pair of left and right side plate portions 15b and 15c are opened rearward from the groove forming portion 15a, and the side plate portions 15b and 15c support a cover plate 16 that is a cover member that is biased downward. Therefore, it is not necessary to separately provide a support member for supporting the cover plate 16, the installation space for the support member can be omitted, the seeding device 14 is supported at a lower position, and the feeding outlet is provided. The fall distance from 91a to the seeding groove can be further shortened. Furthermore, the soil covering effect can be enhanced by placing the soil covering plate 16 in a downward biased state.

  In the present invention, a front wheel and a rear wheel are arranged on the front and rear of the body frame, and a seeding unit including a seeding device and a grooved tool is arranged in the left-right direction between the front wheel and the rear wheel, and is bundled in a plurality of strips. It can be applied to all sowing machines that perform sowing.

DESCRIPTION OF SYMBOLS 1 Sowing machine 2.3 Machine frame 2a, 3a Front frame 2b, 3b Rear frame 4L, 4R Connecting shaft 5 Front roller (front wheel)
6 Squeezing roller (rear wheel)
13 Feeding base 14 Seeding device 14a Feeding part 14b First locking projection (locking part)
14c 2nd latching protrusion (locking part)
15 Growing nails (groove tools)
17 Seeding unit 18 Power transmission path 24 Feeding shaft 26 Depth adjustment tool 27 Seeding device attachment / detachment structure 64 Seeding depth adjustment mechanism 67 · 68 Angle (flexion angle)
75 Driven gear 80 Lower clamping plate (clamping body)
81 Upper clamping plate (clamping body)
82 Drive gear 83 Side clamping plate (Clamping body)

Claims (5)

A front wheel and a rear wheel are arranged in front of and behind the body frame, and a plurality of sowing units provided with a seeding device and a grooved tool are arranged in the left-right direction between the front wheel and the rear wheel, sowing in a plurality of strips at once. In the sowing machine that performs, for at least a part of the body frame, a sowing depth adjustment mechanism capable of simultaneously tilting all sowing units,
The seeding depth adjustment mechanism divides the body frame into two parts, a front frame that supports the front wheel and a rear frame that supports the rear wheel, and the rear frame and the front frame are centered on a connecting shaft. And bendable up and down,
A seeder comprising a depth adjuster capable of changing a distance between the front frame and the rear frame at a position apart from the connection shaft . By supporting all sowing units only on one of the front frame or the rear frame, the bending angle formed by the front frame and the rear frame is changed, and all the sowing units can be tilted simultaneously. The seeder according to claim 1. The seeding machine according to claim 1 , wherein the connecting shaft is interposed between an end portion of one of the front frame and the rear frame and a middle portion of the other frame .   Between the seeding device and the feeding base for attaching the feeding portion of the seeding device to the machine frame, the attachment of the feeding portion to the feeding base and the power connection of the feeding portion to the power transmission path are simultaneously performed. 2. A seeding device attaching / detaching structure is provided for performing one operation or a second operation for simultaneously performing removal of the feeding portion from the feeding base and power cutting of the feeding portion from the power transmission path. The seeder according to any one of claims 3 to 4.   The seeding device attachment / detachment structure includes a driven gear fitted to a feeding shaft for driving the seeding device on the feeding portion side and a plurality of locking portions, and the driven gear in an attached state on the feeding base side. The seeding machine according to claim 4, further comprising: a driving gear that meshes with the holding portion; and a holding body that holds the locking portion.

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