JP2013046628A - Direct seeding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize seeding depth of a direct seeding machine by using a direct seeding machine provided with a traveling body having a traveling apparatus, and a direct seeding device furnished with a seed delivering part to deliver seeds from a seed tank, a seed conduit to guide the seeds delivered from the seed delivering part, and a seeding furrow opener to open a seeding furrow on a field, blasting air to surface soil of a seeding part before seeding and before forming a furrow with the seeding furrow opener and seeding at the seeding part after removing water from the surface soil.SOLUTION: Air supplied through an air channel (194) of the direct seeding machine is blown from the front side to the back side of the seeding furrow opener (164) against the surface soil of the furrow opened by the seeding furrow opener (164).

Description

The present invention relates to a direct seeding machine .

  Conventionally, a seedling platform that supplies a plurality of seedlings on the left and right corresponding to the seedling mounting section corresponding to the seedling mounting section by placing the seedlings on the seedling mounting sections provided on the left and right and moving left and right, A seedling planting section provided with a plurality of seedling planting devices provided on the left and right sides for taking and planting the seedlings at the outlet is provided in the vehicle body, and a powder storage section for storing fertilizer and chemicals that become powder granules and the powder storage section Riding type rice transplanter to be a seedling transplanter provided with a support for supporting a seedling mounting stage by a support frame with a powder body discharging device provided with a feeding section that feeds out the powder body of a predetermined amount and a motor that drives the feeding section It has been known.

  The chemicals and fertilizers sprayed from the powder storage unit (hopper) of the powder-type rice transplanter of this riding type rice transplanter are supplied to the seedlings on the seedling stand just before rice planting. It is necessary to carefully disperse in order to avoid uneven dispersion. Therefore, the drug spraying device is disposed at a position facing the seedling mat mounting surface of the seedling mounting table, and the driving mechanism of the drug spraying device is interlocked with the seedling feeding belt of the seedling mounting table, and the same belt as the seedling feeding belt. There is disclosed a riding type rice transplanter that is configured to be able to intermittently drive in conjunction with a unit clutch that transmits and disconnects power to the vehicle. (Patent Document 1).

JP 2002-27895 A

The present invention includes a traveling vehicle body provided with a traveling device and a direct sowing device. The direct sowing device includes a seed feeding unit that feeds seeds from a seed tank, a seed conduit that guides seeds from the seed feeding unit, and sowing in a field. In a direct sowing machine equipped with a sowing groover for creating a ditch for grouting, air is blown into the topsoil before sowing where the grooves are formed by the sowing grooving device, and the water before the sowing is removed It is an object to stabilize the seeding depth by sowing .

The said subject is achieved by the following structure.
That is, the invention according to claim 1 is provided with a traveling vehicle body (1) including a traveling device (2, 3) and a direct sowing device (102), and the direct sowing device (102) includes a seed tank (105). A seed feeding unit (187) for feeding seeds, a seed conduit (191) for guiding seeds from the seed feeding unit (187), and a sowing grooving device (164) for creating a sowing groove in a field. A direct sowing machine configured to blow out air supplied through the flow path (194) from the front to the rear of the sowing groover (164) to the topsoil of the groove formed by the sowing groover (164). It is.

The invention according to claim 2 is provided with a traveling vehicle body (1) provided with a traveling device (2, 3) and a direct sowing device (102), and the direct sowing device (102) includes a seed tank (105). A seed feeding unit (187) for feeding seeds, a seed conduit (191) for guiding seeds from the seed feeding unit (187), and a seeding grooving device (164) for creating a sowing groove in a field, The conduit (191) has a double structure composed of a seed supply part (191a) provided in the central part and an air blowing part (191b) provided on the outer periphery of the supply part (191a). 194) is a direct sowing machine configured to blow out air supplied from the air blowing section (191b) to the topsoil of the groove formed by the sowing groover (164) .

Moreover, the invention which concerns on Claim 3 is a direct seeding machine of Claim 2 which comprised the diameter of the seed conduit | pipe (191) so that the lower part was comprised .
According to a fourth aspect of the present invention, there is provided a first pipe (91) that extends upward from a lower front portion of the traveling vehicle body (1) and bends forward, and a horizontal direction provided on an upper portion of the first pipe (91). The second pipe (93) extending, the third pipe (92) extending in the horizontal direction provided at the lower portion of the first pipe (91), and the bent portion of the first pipe (91) are fixed in plan view. The direct seeder according to any one of claims 1 to 3, further comprising a ring-shaped pipe (95) surrounding the second pipe (93).

According to the invention of claim 1 , since air can be blown to the top soil before the sowing where grooves are formed by the sowing groover (164), sowing can be performed at the location before sowing after removing the water of the top soil, sowing The depth is stable .

According to the second aspect of the present invention, air can be surely blown out to the surface soil before the sowing where the grooves are formed by the sowing grooving device (164), so that the water before the sowing can be sown. , Sowing depth is stable .

According to the invention of claim 3 , in addition to the effect of the invention of claim 2, air can be blown out from the outer periphery of the sowing position to the sowing position, and further water removal effect and sowing depth Can be stabilized.

According to the invention described in claim 4 , in addition to the effect of the invention described in any one of claims 1 to 3, the worker (W) faces rearward and enters the ring-shaped pipe (95). The direct sowing machine can be safely taken out of the cocoon by putting the heel part on the second pipe (93) and putting the foot on the third pipe (92).

It is a side view of a riding type rice transplanter. It is a top view of the rice transplanter of FIG. It is a side view of the principal part of the vicinity of the granular material discharge apparatus of the rice transplanter of FIG. It is a rear view of the principal part of the granular material discharge part of the rice transplanter of FIG. It is a side cross section of the principal part of the granular material discharge apparatus of FIG. It is a front view of the saddle clutch of the riding type rice transplanter of 8-row planting. It is a perspective view of the connection part of the 3rd, 4th line arm of the hook clutch of FIG. 6, the 3rd, 4th line seedling planting cable, and the 3rd, 4th line seedling feeding cable. FIG. 8 (a) is a simplified perspective view of the front part of the rice transplanter, FIG. 8 (b) is a simplified side view of the front part of the rice transplanter, and FIG. It is a rear view when sitting down. It is a left view of the direct seeding machine with a riding type fertilizer application device. It is an enlarged side view of the direct sowing apparatus part of the direct sowing machine of FIG. It is front sectional drawing which showed another example of the groove producing device shown in FIG.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a seedling transplanter, which shows a six-row riding type rice transplanter as an example of a seedling transplanter. FIG. 2 is a plan view of the rice transplanter of FIG.

  3 is a side view of the main part in the vicinity of the granular material discharge device of the rice transplanter of FIG. 1, and FIG. 4 is a rear view (partially simplified) of the main part of the granular material discharge part of the rice transplanter of FIG. Figure). FIG. 5 is a side sectional view of a main part of the granular material discharge device of FIG. In the following description, the forward direction of the rice transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

  A pair of left and right front wheels 2, 2 and rear wheels 3, 3 as traveling wheels are installed before and after the vehicle body 1. A steering device having an operation box 4 and a steering handle 5 is installed at the front upper part of the vehicle body, and a seedling planting part 6 that can be moved up and down is provided at the rear part of the vehicle body. A driver's seat 9 is installed on the rear side of the control device, and an engine E that transmits power to each part of the rice transplanter is mounted below the driver's seat.

  The seedling planting part 6 is mounted on the rear part of the vehicle body through a lifting link mechanism 7 so as to be able to be lifted and lowered by a telescopic operation of the lifting hydraulic cylinder 8. A lifting hydraulic valve V (FIG. 2) for controlling the lifting hydraulic cylinder 8 is provided below the step floor F on the right side of the machine body.

  Further, the seedling planting section 6 has a mat seedling placed on each of the seedling mounting sections 11e provided on the left and right sides, and reciprocates left and right, so that the seedlings are taken out one by one. When all the seedlings in the horizontal row are supplied to the seedling outlet 11b, the seedling tank 11 that serves as a seedling stage for transferring the seedlings downward by the seedling feeding belt 11c is actuated by drawing a closed loop locus P (FIG. 1). 6 seedling planting devices 13 for cutting out one stock of seedlings with a seedling planting tool 12 and planting them in the soil, floats (side floats) 14L, 14R for leveling while sliding on the seedling planting surface, The center float 14C is provided.

  A transmission case 20 is disposed on the front side of the traveling vehicle body 1, and a front wheel axle case (not shown) extends laterally from the left and right side surfaces of the transmission case 20. Front wheels 2 and 2 are rotatably supported on the case 21. Further, the front end portion of the main frame 22 is fixed to the rear portion of the transmission case 20, and is fixed to the front end portion of a rear frame (not shown) extending from the rear end portion of the main frame 22 to the left and right sides. Further, the rear wheels 3 and 3 are rotatably supported on the rear wheel transmission case 23.

  Rotational power from the engine E as a prime mover is transmitted as an input transmission mechanism to the transmission case 20 from the engine output pulley 24 to the input shaft of a hydraulic continuously variable transmission (HST) 26 via a belt 25. The hydraulic pump is driven from the shaft, and is further transmitted from the output shaft of the HST 26 to the mission input shaft in the mission case 20. The rotational power transmitted to the mission in the case 20 is shifted by the transmission in the case 20, and then branched into traveling power and external power to be taken out. The traveling power drives the rear wheels 3 and 3 from the front wheels 2 and 2 and the rear wheel transmission shaft 27 through the gear mechanism of the rear wheel transmission case 23. Further, the external take-out power is transmitted to the planting transmission shaft 31 as an output transmission mechanism from the mission case 20 via a PTO output shaft 57, a planting motor 30 provided in the planting clutch case 28 and controlled by a microcomputer. Furthermore, power is transmitted to the seedling planting section 6 by the planting transmission shaft 31.

  The HST 26 is configured to be driven by a forward / backward operation of a shift lever 33 provided on the side of the operation box 4 and to control forward and backward movement of the fuselage. The HST 26 is operated with the shift lever 33 facing forward. The forward travel speed becomes faster the more you do it. Further, a stock change means for changing the operating cycle of the seedling planting tool 12 with respect to the traveling speed is provided, and the stock change is performed by operating the stock change lever 35 provided below the operation box 4.

  The seedling planting section 6 has a six-row planting structure, a transmission case 50 that also serves as a frame, a seedling mounting section 11e that carries the seedlings to reciprocate left and right and feeds the seedlings one by one to the seedling outlet 11b, ... , A seedling planting device 13 for planting seedlings supplied to the seedling outlet 11b,...

  In the lower part of the seedling planting part 6, a center float 14C is provided at the center, and side floats 14L and 14R are provided on the left and right sides thereof. When the aircraft is advanced with these floats 14C, 14L, 14R in contact with the mud surface of the field, the floats 14C, 14L, 14R slide while leveling the mud surface, and the seedling planting device 13, Seedlings are planted by ... Each of the floats 14C, 14L, 14R is rotatably mounted so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 14C is detected during the planting operation. The planting depth of the seedling is always maintained constant by switching the hydraulic valve V that controls the lifting hydraulic cylinder 8 according to the detection result to raise and lower the seedling planting unit 6.

  Although the seedling planting part 6 is not shown in detail, the seedling mounting part 11e,... Is slidable left and right by the power on the traveling vehicle body via the planting transmission shaft 31 (FIG. 1). By reciprocating left and right, the seedling positioned at the lowest stage of the seedling mounting portion 11e is supplied to the seedling taking-out port 11b (FIG. 2), and the seedling is planted in the field by the seedling planting device 13,. When the seedling placement part 11e moves to the end of the left and right stroke and all the lowest seedlings are planted, the seedling feeding belt 11c operates to transfer the seedling on the seedling placement part 11e downward by one stage. To do.

  The power transmitted to the seedling planting unit 6 by the planting transmission shaft 31 is transmitted into the planting transmission case 50 provided in the seedling planting unit 6, and the seedling planting device for each strip is transmitted from the planting transmission case 50. 13 and the seedling feeding belt 11c. A branch transmission unit 50a that branches power in the planting transmission case 50 and transmits it to the seedling planting device 13 in units of every two strips is provided, and a partial clutch 51 that turns on and off the transmission of the branch transmission unit 50a is provided. It is provided, and the seedling planting device 13 can be stopped every two lines by the partial clutch 51.

  The partial clutch 51 that switches the operation and stop of the seedling planting device 13 in units of two adjacent lines is often operated to “cut” at the time of work on the heel, so it is usually called “畦 clutch”. It is. An interlocking mechanism that stops the seedling feeding belt 11c of the planting line corresponding to the operation of the hook clutch 51 is also provided. Each saddle clutch lever 52 that operates the saddle clutch 51 is provided on the side of the driver's seat 9, and a saddle clutch sensor 52 a (FIG. 1) that detects the operating position of the saddle clutch lever 52 is provided.

  At a position facing the mat seedling placement surface of the seedling tank 11, a powder storage part 15 for storing powders such as drugs and fertilizers, a feeding part 17 for feeding the powders by a predetermined amount, and the powders A powder body discharge device 18 including a lid portion 16 provided in the body storage portion 15 so as to be openable and closable is disposed. In addition, the granular material discharge apparatus 18 is not illustrated in FIG.1 and FIG.2. Further, the feeding section 17 is provided for every two strips corresponding to the two seedling placement sections 11e of the seedling tank 11, and is provided by a left and right long feeding roller 17a (FIG. 5) across the two seedling placement sections 11e. It becomes the composition which pays out a granular material.

  The feeding roller 17a is transmitted to a driven gear 53 that meshes with the output gear 19a of the motor 19 by driving the two motors 19 corresponding to the roller 17a, and is driven to rotate integrally with the driven gear 53. It has become. The motor 19 is disposed on the rear side of the feeding portion 17, and on the front side of the feeding portion 17, a feeding rotation sensor 54 for each two strips for detecting the rotation amount of the feeding roller 17 a by detecting the teeth of the driven gear 53. The motor 19 is driven and controlled by a control box 55 (FIG. 4) serving as a control device so that the feeding roller 17a rotates a set amount based on the detection of the feeding rotation sensor 54.

  The motor 19 is driven by the control box 55 in conjunction with the operation of the seedling feeding belt 11c based on the detection of the seedling feeding sensor 56 (FIG. 3) that detects the operation of the seedling feeding belt 11c. Further, when the heel clutch sensor 52a (FIG. 1) detects that the heel clutch 51 is disengaged by the control box 55, the motor 19 is not driven regardless of the detection of the seedling feed sensor 56. Since the motor 19 and the feeding rotation sensor 54 are arranged separately before and after the feeding portion 17, they do not interfere with each other during maintenance such as repair, attachment or removal, and maintenance can be performed easily.

  The granular material discharge device 18 is mounted and supported on a support arm 37 that can be rotated with a support shaft 36 as a fulcrum, and can be switched between a standing posture during a spraying operation and a lying posture during a non-spraying operation. When the granular material discharge device 18 is switched to the lying posture, the supply port of the granular material storage unit 15 is directed downward so that the granular material flows down. When the lid 16 that can be swingably opened / closed is opened via the hinge 16a (FIG. 3) with respect to the granular material reservoir 15, the posture is directed upward so that the granular material can flow down. It is configured. Further, the volume of the lid portion 16 is set to be substantially the same as the volume of the storage portion 15 or larger than the storage portion.

  When the powder and particle ejection device 18 is switched to the lying posture, the rear portion of the ejection device 18 is configured to be located at substantially the same position as or slightly forward of the rear portion of the float 14, thereby preventing external interference. The breakage of the granular material discharge device 18 itself is prevented.

  Further, the support frame 38 that supports the granular material discharge device 18 is provided along the partition protrusion 11d that is partitioned for each mat seedling of the seedling tank 11, so that the support frame 38 is separated from the partition protrusion 11d inward. The occurrence of entanglement of seedlings, seedling slipping, and seedling cutting can be prevented as in the case where they are provided at different positions.

  The feeding outlet portion 17b (FIG. 5) of the feeding portion 17 has a lower portion on the opposite side to the mounting side of the brush 17c that is longer downward by a distance L than the brush mounting side, thereby preventing scattering of the granular material. It is configured. The powder and granular material discharge cylinder 39 connected to the supply port 17b of the supply unit 17 is configured to be housed in the holding frame 40 of the discharge device 18, whereby a compact configuration can be achieved.

Then , the rice transplanter moves the seedlings of the seedling mounting portion 11e to the left and right to supply the seedlings to the seedling outlet 11b one by one. When the horizontal row of seedlings is taken out from the seedling outlet 11b, the seedlings in the next row are sent to the seedling feeding belt. A seedling tank (seedling feeding device) 11 that is transported downward by 11c and sent to the seedling outlet 11b, and a granular material in the granular material storage unit 15 are fed out from the feeding unit 17 by a predetermined amount, and on the seedling mounting unit 11e. In addition to the granular material discharge device 18 that discharges the granular material to the seedling, the seedling removal device 60 that acts on the seedling leaves at the position where the granular material is discharged by the granular material discharge device 18 and removes the seedling leaves. (FIG. 3) is provided. Thus, by providing the seedling removal device 60, the seedlings at the position where the powder is discharged can be removed, so that the powder can be supplied to the seedling floor.

  As shown in FIG. 3, a side view L-shaped crank 43 having one end fixedly connected to the motor shaft 19 b of the motor 19 is provided, and one end of the arm 41 is rotated by a pin 47 at the other end of the crank 43. It is linked in a movable manner. The L-shaped crank 43 is composed of two upper cranks 43a (short arms) and a lower crank 43b (long arms) which are rotatably connected by pins 46, and further provided at the other end of the arm 41. The seedling-removal rod 45 is inserted into the hole and fixedly connected, and the seedling-removal rod 45 is laid across the full width of the seedling placement surface of the seedling placement part 11e.

  A pin 48 is provided near the middle of the connecting portion between the crank 43 of the arm 41 and the seedling rod 45, and the arm 41 and the support arm 37 are rotatably connected. Therefore, the arm 41 is configured to be swingable in the vertical direction (arrow B direction) around the connecting portion (pin) 48 with the support arm 37. These motor 19, motor shaft 19b, L-shaped crank 43, The arm 41, the seedling-removing rod 45, the pin 46, the pin 47, the pin 48, etc. constitute a seedling-removing device 60.

  When the motor 19 is driven by the control by the control box 55, the upper crank 43a rotates along with the movement of the motor shaft 19b by the rotation of the motor shaft 19b. The lower crank 43b moves up and down along the movement of the pin 46 at the upper end, and the pin 47 at the lower end also moves up and down, so that the arm 41 moves the connecting portion 48 with the support arm 37 along with the movement of the pin 47. Swings up and down around the center. Therefore, the seedling rod 45 connected to the arm 41 swings up and down in the direction of arrow B about the connecting portion (pin) 48.

  Thus, when the seedling-removal rod 45 is rotated upward by the drive of the motor 19, the seedling-removal rod 45 is located above the seedling leaf on the seedling mounting portion 11e, so it does not hit the seedling leaf and does not act. When the seedling-removal rod 45 rotates downward, the seedling-removal rod 45 hits the leaf of the seedling on the seedling mounting portion 11e and the leaves are tilted to remove the seedling leaf at the position where the powdery body is discharged. A space is formed below the discharge cylinder 39, and a powder or the like such as a drug is sprayed on the floor that is the root of the mat seedling.

  Thus, since the seedling removal device 60 is interlocked with the operation of the motor 19, the feeding operation of the powder by the feeding roller 17a of the powder discharge device 18, that is, the discharge from the powder discharge cylinder 39 is performed. The seedling-removing rod 45 can be operated in conjunction with the operation by the interlocking mechanism A such as the arm 41, the crank 43, the pins 46, 47, and 48 described above from the motor shaft 19b through the driving of the motor 19. Therefore, the motor 19 is driven by the control box 55 serving as a control device in conjunction with the discharge operation of the powder discharged from the powder discharge cylinder 39 of the powder discharge device 18, and at the time of discharging the powder. By controlling the arm 41 so as to lower the seedling-removing rod 45 by rotating the seedling-removing rod 45 side downward, it is possible to remove the leaves of the seedling at the position where the powder particles are discharged. On the other hand, when the granular material is not discharged, the seedling-removing rod 45 side of the arm 41 is rotated upward to control the raising so that the seedling-removing rod 45 is raised, so that it does not act on the seedling leaves.

  In the prior art, when the seedling on the seedling mount 11 is transferred downward and the seedling reaches the position where the resistance bar for removing seedlings is horizontally mounted, the resistance bar always acts. And until the seedling is transferred below the horizontal position of the resistance bar, it will be affected by the resistance bar. Therefore, seedling removal by the prior art always acts on the seedlings on the seedling stand 11 for a long time, and this causes resistance when the seedlings are sent downward.

However , the seedling removal device 60 of the rice transplanter acts on the seedlings at the position where the granular material is discharged from the granular material discharging device 18 in conjunction with the discharging operation of the granular material of the granular material discharging device 18. Therefore, it does not act on the seedlings when the powder is not discharged. Therefore, the seedling-removing rod 45 of the seedling-removing device 60 does not become a resistance for feeding seedlings, so that the position of the seedling on the seedling tank 11 can be prevented from being inappropriate, and seedling planting work can be performed properly.

  Further, as shown in FIGS. 3 and 4, fences 63 for preventing powders and the like from scattering to the outside may be provided on both side surfaces (outermost sides) of the seedling tank 11. By providing the fences 63 on both side surfaces of the seedling tank 11, the granular material discharged from the feeding roller 17a of the granular material discharging device 18 is not scattered outside the seedling tank 11, so that the granular material is dispersed wastefully. It is possible to increase the spraying efficiency.

  6 is a front view of a saddle clutch of an eight-row planted rice transplanter, and FIG. 7 shows the third and fourth arm 80b and the third and fourth seedling planting cables 72b of the saddle clutch in FIG. The perspective view of a connection part with the 3rd and 4th seedling feeding cable 73b is shown.

  According to the 6-row riding type rice transplanter shown in FIG. 1, the heel clutch 51 is provided for each two lanes, and the heel clutch lever 52 for operating each heel clutch 51 is provided. In the 8-row riding type rice transplanter, the saddle clutch itself is the same as the 6-row riding type rice transplanter. In the riding type rice transplanter, there are four saddle clutches 51.

  In the eight-row riding type rice transplanter shown in FIG. 6, the cocoon clutch unit 61 is provided on the back surface of the seedling tank 11, and the seedling planting device 13 for each two lanes and corresponding to it by turning on and off the cocoon clutch unit 61. The operating directions of the cables 72 and 73 for operating the seedling feeding belt 11c of the planting strip to be operated (the direction in which the hook clutch unit 61 is “entered” or “cut”) are symmetric with respect to the top and bottom of the motor 70 and symmetrical with respect to the left and right. Like that.

  As shown in FIG. 6, the saddle clutch unit 61 is provided with a motor 70 supported by a support plate 65 and a gear 71 that meshes with a gear 70 a provided on a rotation shaft portion of the motor 70. A cam 75 is fixedly connected to the rotary shaft 71a. When the motor 70 is driven and, for example, the gear 70a provided on the rotating shaft portion of the motor 70 rotates in the direction of arrow B, the gear 71 that meshes with the gear 70a rotates in the direction of arrow C, thereby rotating the rotating shaft 71a of the gear 71. Similarly, the cam 75 fixed to the head rotates in the direction of arrow C. An angle sensor 83 is provided on the rotating shaft 71a of the cam 75 (the rotating shaft of the gear 71), the rotation angle of the cam 75 is detected by the angle sensor 83, and the cam 75 can swing within a predetermined angle range. .

  Further, two pairs of upper and lower pairs of third and fourth arms 80b and fifth and sixth threads connected to a seedling planting cable 72 for operating the seedling planting device 13 and a seedling feeding cable 73 for operating the seedling feeding belt 11c. Rollers 81b, 81c, 81a provided at the ends of the base side of the arm 80c (above, the upper arm in the drawing) and the first, second, and eighth arms 80a, 80d (the lower arm in the drawing), respectively. , 81d and the side surfaces of the cam 75 are in contact with each other. In addition, the seedling planting cables 72b, 72c, 72a, 72d for operating the seedling planting device 13 and the seedling feeding are provided at the distal ends of the two upper and lower arms 80b, 80c (upper side) and arms 80a, 80d (lower side). The seedling feeding cables 73b, 73c, 73a, 73d for operating the belt 11c are connected to each other. In FIG. 7, the third and fourth arm 80b and the third and fourth seedling planting cable 72b and the third and fourth seedling planting cable 72b are shown so that the connection relationship between each arm 80 and the seedling planting cable 72 and the seedling feeding cable 73 is easy to understand. The perspective view of the connection part with the 3rd and 4th seedling feeding cable 73b is shown.

  The distal ends of the first and second seedling planting cables 72a and the first and second seedling feeding cables 73a are connected to the distal ends of the arms 80a, and the other ends of the cables 72a and 73a (as shown). (Not shown) is connected to the operation members of the planting rod clutch 51 and the seedling feeding rod clutch (not shown). The planting rod clutch 51 is provided in the branch transmission section 50a (FIG. 2). It is configured to mesh with the operating mechanism S of the belt 11c.

  Similarly, the 3rd and 4th seedling planting cables 72b and the seedling feeding cable 73b are connected to the arm 80b, the 5th and 6th seedling planting cables 72c and the seedling feeding cable 73c are connected to the arm 80c, The 7 and 8 seedling planting cables 72d and the seedling feeding cable 73d are connected to the arm 80d, and the seedling planting cables 72b, 72c and 72d of each strip and the seedling feeding cables 73b, 73c and 73d of each strip are Each is connected to the operation member of the planting rod clutch 51 and the seedling feeding rod clutch of each strip. In FIG. 6, some cables (the seedling planting cable 72b and the seedling feeding cable 73c, the seedling feeding cable 73a, the seedling feeding cable 73d, and the like) are overlapped in the drawing.

  When the cam 75 is rotated in the direction of arrow C by the rotation of the motor 70, the rollers 81a, 81b, 81c, 81d that are in contact with the cam 75 move in the directions of arrows Da, Db, Dc, Dd, respectively, and the arms 80a, 80b, 80c and 80d rotate around fulcrum portions 82a, 82b, 82c and 82d supported by the support plate 65, and the tips of the arms 80a, 80b, 80c and 80d are in the directions of arrows Ea, Eb, Ec and Ed, respectively. By moving, the two pairs of upper and lower arms 80a, 80b, 80c, 80d move from the two-dot chain line position to the solid line position, and the saddle clutch unit 61 is activated (entered).

  Accordingly, the first and second seedling feeding cables 73a are pulled in the direction of the arrow Fa, the first and second seedling feeding rod clutches are engaged, and the first and second seedling feeding belts 11c are driven to drive the seedlings. Move down. Similarly, the third and fourth seedling feeding cable 73b is pulled in the direction of arrow Fb, the third and fourth seedling feeding rod clutch is engaged, and the third and fourth seedling feeding belt 11c is driven. The fifth and sixth seedling feed cables 73c are also pulled in the direction of the arrow Fc, and the fifth and sixth seedling feeding rod clutches are engaged to drive the fifth and sixth seedling feeding belts 11c. The seedling feeding cable 73d is also pulled in the direction of the arrow Fd, and the seventh and eighth seedling feeding rod clutches are engaged, and the seventh and eighth seedling feeding belt 11c is driven to simultaneously transfer the seedlings downward in each strip. It is the structure to do.

  Similarly, the first and second striped cable 72a is pulled in the direction of arrow Fa, the third and fourth striped cable 72b is pulled in the direction of arrow Fb, and the fifth and sixth striped cable 72c is pulled in the direction of arrow Fc. The seventh and eighth strip planting cables 72d are pulled in the direction of the arrow Fd, and the transmission of the branch transmission section 50a (FIG. 2) connected to each of the cables 72a, 72b, 72c, 72d is performed. The seedling planting device 13 is activated.

  As described above, since the hook clutch unit 61 (the unit including the planting hook clutch 51 and the seedling feeding hook clutch) can be turned on and off with a single motor 70, the hook clutch unit 61 is provided for each line. There is no need to turn on and off, and the operation of the saddle clutch unit 61 is simplified. In addition, since the operation mechanism is symmetrical in the vertical and horizontal directions, the overall balance is good.

  As shown in FIG. 6, the operation direction of the cable 72 for operating the seedling planting device 13 for every two strips and the cable 73 for operating the seedling feeding belt 11 c of the planting strip corresponding thereto (the hook clutch unit 61 is The direction of “entering” or “cutting”) is symmetric vertically and symmetrically.

  That is, when the hook clutch unit 61 enters from the cut, the third and fourth strip cables 72b and 73b and the first and second strip cables 72a and 73a, which are symmetrical in the vertical direction, The operating direction of the four-row seedling feeding cable 73b and the third and fourth-row planting cable 72b is the arrow Fb direction. Since the operation direction is the direction of arrow Fa, the operation directions of the cables 72 and 73 are opposite to each other (opposite directions). Similarly, in the fifth and sixth strip cables 72c and 73c and the seventh and eighth strip cables 72d and 73d that are symmetrical in the vertical direction, the fifth and sixth strip feeding cables 73c and the fifth and sixth strips on the upper right side of the drawing are used. The operating direction of the planting cable 72c is the arrow Fc direction, but the operating directions of the seventh and eighth planting cables 72d and the seventh and eighth seedling feeding cable 73d on the lower right side of the drawing are the arrow Fd directions. The operating directions of 72 and 73 are opposite to each other.

  Further, when the hook clutch unit 61 enters from the cut, the third and fourth strip cables 72b and 73b and the fifth and sixth strip cables 72c and 73c which are symmetrical in the left-right direction are the third and third cables on the upper left side of the drawing. The operation direction of the four-row seedling feeding cable 73b and the third and fourth-row planting cable 72b is the arrow Fb direction, but the fifth and sixth row seedling feeding cable 73c and the fifth and sixth row planting cable 72c on the upper right side of the drawing. Since the operation direction is the direction of arrow Fc, the operation directions of the cables 72 and 73 are opposite to each other (opposite directions). Similarly, in the first and second strip cables 72a and 73a and the seventh and eighth strip planting cables 72d and 73d on the lower right side in the drawing, the first and second strip planting cables 72a on the lower left side in the drawing are symmetrical. The operation direction of the first and second row seedling feeding cables 73a is the arrow Fa direction, but the operation direction of the seventh and eighth row seeding feeding cables 72d and the seventh and eighth row seedling feeding cables 73d on the lower right side of the drawing is the arrow Fd. Direction, the operating directions are opposite to each other.

  By adopting this configuration, the operation direction of the operating cables 72 and 73 when the hook clutch unit 61 is “ON” or “OFF” is made symmetrical in the vertical direction and symmetrical in the horizontal direction. Since the force acting on the entire unit 61 can be balanced, excessive force is not applied to the saddle clutch unit 61, and durability of the saddle clutch unit 61 is improved.

  By the way, when moving over the rice transplanter to the next field, it is necessary for the operator to get off the rice transplanter and operate the handle 5 to steer the vehicle 1 in order to prevent the front part from lifting. is there. However, it is not easy to steer in a posture where the worker gets off the vehicle body 1.

  In addition, a heel-crossing arm is provided at the front portion of the traveling vehicle body 1 so as to be pivotable up and down, and the heel-crossing arm is pivoted downward and pushed forward so as to protrude downward. There is a rice transplanter that prevents lifting, and in a normal operation, puts the arm over the ridge upward and places it in a rear stowed state. The arm over the heel is provided to get out the ridge by operating the rice transplanter while holding the arm down and holding it down. In this case, it is necessary to hold the arm over the heel with one hand and operate the handle 5 with the other hand to walk backwards, which is a very unstable state and a heavy burden on the operator.

Therefore, it is necessary to facilitate the operation when crossing the heel, to prevent a very unstable state, and to reduce the burden on the operator.
Figure 8 shows an example of Azekoe arms, 8 (a) is a simplified perspective view of the front portion of the planting machine, FIG. 8 (b) is a simplified side view of the front portion of the rice transplanter . FIG. 8C shows a rear view when the operator W sits on the arm over the heel 90. FIG.

The heel overarm 90 shown in FIG. 8 is configured such that an operator can sit on the heel overarm 90. Hereinafter, the eyelid crossing arm 90 will be described in detail.
A pipe 91 is fixed to the lower front portion of the vehicle body 1 and extends vertically upward at the front center of the vehicle body 1, and the pipe 91 is moved forward at a position near the height of the handle 5 or slightly lower than the height of the handle 5. To bend. The pipes 92 and 93 are attached in the horizontal direction near the tip of the pipe 91 and the height position of the step floor F, respectively. The worker W faces the vehicle body 1, sits down on the upper horizontal pipe 93 at the height position of the handle 5, and puts his foot on the lower horizontal pipe 92 at the height position of the step floor F. Thus, the rice transplanter can be safely removed from the fence by operating the handle 5 while sitting on the bridge overarm 90.

  Further, a ring-shaped pipe 95 (which may be circular, rectangular, square, or the like) is fixed to the bent portion 91a of the pipe 91 by welding or the like so as to surround the upper horizontal pipe 93 in plan view. . When the ring-shaped pipe 95 is not provided, the worker W simply sits on the upper horizontal pipe 93 and the body is not fixed. Therefore, when the rice transplanter is tilted, it is difficult to achieve a balance due to the reaction over the fence. However, as shown in FIG. 8C, when the worker W puts the buttocks in the ring-shaped pipe 95 and sits on the upper horizontal pipe 93, the back and sides of the worker W are firmly fixed. This improves operability and safety.

  By adopting this configuration, the operator can put the weight on the front of the vehicle body 1 and operate the handle 5 with both hands, so hold the arm 90 over the arm 90 with one hand and operate the handle 5 with the other hand. The operation is not performed in an unstable state where the user walks forward and the operability and safety are improved. Further, it is possible to facilitate the operation at the time of crossing the heel, and it is possible to cross the heel in a stable state, thereby reducing the burden on the operator.

  Next, a configuration in the case where the seedling planting unit 6 of the seedling transplanting machine in FIG. FIG. 9 shows a left side view of a riding type direct sowing machine with a fertilizer application device. In this riding type direct sowing machine, the direct sowing apparatus 102 is moved up and down via a lifting link device 7 on the rear side of the traveling vehicle body 1. The main body portion of the fertilizer application device 120 is provided on the rear upper side of the traveling vehicle body 1.

  The traveling vehicle body 1 is a four-wheel drive vehicle including a pair of left and right front wheels 2 and 2 and rear wheels 3 and 3 as drive wheels. A mission case 20 is disposed at the front of the fuselage. Front wheel final cases 21 and 21 are provided on the left and right sides of the front wheel, and the front wheels 2 and 2 are attached to a front wheel axle that protrudes outward from a front wheel support portion that can change the steering direction of the front wheel final case 21. . Further, the front end portion of the main frame 22 is fixed to the rear portion of the transmission case 20, and a rear wheel rolling shaft (not shown) provided horizontally in the front and rear at the center of the rear end of the main frame 22 is used as a fulcrum. Rear wheel gear cases (rear wheel transmission cases) 23 and 23 are supported in a freely rolling manner, and rear wheels 3 and 3 are attached to rear wheel axles that project outward from the rear wheel gear cases 23 and 23.

  The engine E as a prime mover is mounted on the main frame 22, and the rotational power of the engine E is transmitted to the transmission case 20 via the first belt transmission device 121 and the second belt transmission device 123. The rotational power transmitted to the mission case 20 is shifted by a transmission in the case 20 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 21, 21 to drive the front wheels 2, 2, and the rest is transmitted to the rear wheel gear cases (rear wheel transmission cases) 23, 23. 3 is driven. Further, the external take-out power is transmitted to a clutch case 115 provided at the rear portion of the traveling vehicle body 1, and is transmitted to the fertilizer application device 120 by the fertilization transmission mechanism 108.

  The upper part of the engine E is covered with an engine cover 130, and a seat 9 is installed thereon. A bonnet 132 incorporating various operation mechanisms is provided in front of the seat 9, and a handle 5 for steering the front wheels 2 and 2 is provided above the bonnet 132. The engine cover 130 and the bonnet 132 have horizontal floor steps F on the left and right sides of the lower end. The rear part of the floor step F is a rear step R that also serves as a rear wheel fender.

  The elevating link device 7 has a parallel link configuration and includes one upper link 7a and a pair of left and right lower links 7b and 7b. These links 7a, 7b, 7b are pivotally attached to a rear-view portal-shaped link base frame 142 standing on the rear end portion of the main frame 22 on the base side, and a vertical link 143 is connected to the front end side thereof. ing. An elevating hydraulic cylinder 146 is provided between the support member fixed to the main frame 22 and the tip of the swing arm 145 formed integrally with the upper link 7a. The link 7a rotates up and down, and the direct seeding device 102 moves up and down while maintaining a substantially constant posture.

  A center float 155 and side floats 156 and 156 are provided at the lower part of the direct seeding device 102. When the aircraft is advanced with these floats 155 and 156 in contact with the mud surface of the field, the floats 155 and 156 slide while leveling the mud surface, and seeds are sown by the direct sowing device 102,. . The floats 155, 156, and 156 are pivotally attached so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 155 is detected as a vertical movement detection mechanism 157 during direct sowing work. By switching the hydraulic valve that controls the lifting hydraulic cylinder 146 according to the detection result, the direct sowing device 102 is raised and lowered, so that the seed sowing depth is always kept constant.

  The fertilizer application device 120 includes a fertilizer feeding unit (powder body feeding unit) 161 provided with a plurality of fertilizers (powder body) stored in a fertilizer storage tank (powder body storage tank) 160 in the left-right direction of the traveling vehicle body 1. ,... Are fed out by a certain amount, and the fertilizer is guided to fertilizer guides (not shown) attached to the left and right sides of the floats 155, 156, 156 with a fertilizer hose (powder transfer hose) 162,. ,... Are discharged into fertilization grooves formed in the vicinity of the side portions of the seeding strips by the seeding groovers 164,. Pressure air generated by a blower (not shown) driven by a motor (not shown) is blown into the fertilizer hose 162,... Via a long air chamber 169 in the left-right direction, and the fertilizer in the fertilizer hose 162,. Is forcibly transferred to the fertilizer outlet on the planting side.

  Further, the support structure of the leveling rotors 127a and 127b includes a beam member whose upper ends are rotatably supported by both side members of a rectangular support frame body 165 including left and right support rods and both side members extending in the vertical direction. 166, a support arm 167 fixed to both ends of the beam member 166, and a rotor support frame 168 rotatably attached to the support arm 167 are provided. A drive shaft (not shown) of the leveling rotor 127a is attached to the lower end of the rotor support frame 168. The rotor 127b in front of the center float 155 is disposed in front of the rotor 127a in front of the side float 156. The rotor 127b is suspended through a spring 178 by a pair of link members 176 and 177 whose upper ends are supported by the beam member 166. The leveling rotors 127 a and 127 b can be moved up and down by the rotor vertical position adjusting lever 181.

  The direct seeding device 102 of the direct seeding machine shown in FIG. 9 has the configuration shown in the enlarged side view of the direct seeding device 102 part of FIG. The direct sowing apparatus 102 includes a seed feeding unit 187 for feeding seeds from an upper seed tank 105, a seed funnel 188 for feeding and guiding seeds, and a discharge cylinder for discharging the seeds fed and guided from the seed funnel 188 downward by air conveyance. 190, a seed conduit 191 and the like, and is supported by a frame 189 extending in the left-right direction.

  The discharge cylinder 190 includes a transfer pipe 193 connected to the seed funnel 188, an air distribution pipe 197 for supplying air to the lower portion of the seed conduit 191 and air for supply to the air distribution pipe 197. 199.

  Below the direct sowing apparatus 102, floats 155 and 156 that are suspended below the sowing frame 110 and are grounded and slid on the soil surface are arranged, and on both sides of the floats 155 and 156. Since a pair of sowing groovers 164 and a pair of soil covering plates 159 filling the grooves in the field made by the sowing groovers 164 are provided, the seeds placed in the grooves in the field are covered with the soil covering plates. 159 can be covered with soil.

  And the air flow path (air tube etc.) 194 used as the flow path of the air which blows off from the air distribution pipe | tube 197 in the lower part of the seed conduit | pipe 191 is provided, and the structure which blows off air toward the back from the front of the grooving device 164, It is characterized by that.

  As shown in FIG. 10, it is arranged so that the tip of the air flow path 194 comes to substantially the same position as the groover 164, and the air is blown from the front to the rear of the groover 164. However, before sowing, air can be blown out to the topsoil where the grooves are formed by the grooving device 164. If water accumulates in the topsoil where seed pods are sown, the amount of water varies depending on the location, so the seeding depth varies, and the sowing depth is not stable. However, by adopting this configuration, it is configured to blow air from the front to the rear of the location where the groove is formed by the groove 164, so that the seed pods are removed after removing the topsoil water at the seeding location. Since seeding is performed, the seeding depth can be stabilized.

FIG. 11 is a front sectional view showing another example of the groove producing device 164 shown in FIG.
Further, as shown in FIG. 11, a seed conduit 191 is provided on the inner periphery of the grooving device 164, and the seed conduit 191 is composed of a double seed supply unit 191a at the center and an air blowing unit 191b at the outer periphery of the supply unit. As a structure, it is good also as a structure which blows off air from the air blowing part 191b to the outer peripheral part of the fall position of a seed potato.

  The air supplied from the air distribution pipe 197 passes through the air flow path 194 and flows from the air blowing part 191b provided on the inner periphery of the side wall of the seed conduit 191 in the direction of the arrow K, and the seed drop position below the seed supply part 191a An air curtain is formed around And by blowing out air into the inside of the grooving device 164 in this way, it is possible to blow away the water around the dropping position of the seed potato, which is the grooving position, and remove it intensively.

By adopting this configuration, air can be reliably blown to the fall position of the seed pod, and the effect of removing water from the topsoil at the seeding location is enhanced. And the stability of the seeding depth by the removal of water from the topsoil is further increased. Further, if the seed conduit 191 is shaped so that the lower part is smaller than the upper part, the air blown from the outer periphery of the seed pod dropping position is concentrated and jetted to the dropping position vigorously. Therefore, the effect of removing water from the topsoil at one sowing location and the stability of the sowing depth can be achieved .

Claims (4)

A traveling vehicle body (1) having a traveling device (2, 3) and a direct sowing device (102) are provided, and the direct sowing device (102) includes a seed feeding unit (187) for feeding seeds from a seed tank (105). , A seed conduit (191) for guiding seeds from the seed feeding section (187), and a sowing groover (164) for creating a sowing groove in the field, air supplied through an air flow path (194) A direct sowing machine in which the seeding groover (164) is blown out from the front to the rear of the groove formed by the seeding groover (164) . A traveling vehicle body (1) having a traveling device (2, 3) and a direct sowing device (102) are provided, and the direct sowing device (102) includes a seed feeding unit (187) for feeding seeds from a seed tank (105). , A seed conduit (191) for guiding seeds from the seed feeding part (187), and a sowing groover (164) for making a sowing groove in the field, the seed conduit (191) being provided in the center The air supply unit (191a) and the air blowing unit (191b) provided on the outer periphery of the supply unit (191a) have a double structure, and the air supplied from the air flow path (194) is air A direct sowing machine configured to blow out from the blowout part (191b) to the topsoil of the groove formed by the sowing groover (164) . The direct sowing machine according to claim 2, wherein the diameter of the seed conduit (191) is made smaller toward the lower part . A first pipe (91) that extends upward from the front lower portion of the traveling vehicle body (1) and bends forward; a second pipe (93) that extends horizontally in the upper portion of the first pipe (91); A third pipe (92) extending in the horizontal direction provided at a lower portion of the first pipe (91) and fixed to a bent portion of the first pipe (91) and surrounding the second pipe (93) in plan view. The direct seeding machine according to any one of claims 1 to 3, comprising a ring-shaped pipe (95).

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