JP2020068742A - Transplanter - Google Patents

Abstract

To provide a transplanter which has a high degree-of-freedom of a layout even when a main frame is avoided, and can hold high machine body strength.SOLUTION: A transplanter includes: right and left travel devices 44 travelling in a field in a travel vehicle body 40; a seedling feeder 43 for feeling seedlings; and planting devices 20a and 20b for receiving seedlings from the seedling feeder 43 and planting in the field. Main frames 103 of the travel vehicle body 40 are disposed on both right and left sides, and a lateral interval between the rear end parts of the right and left main frames 103 is wider than a lateral interval between the front end parts, and is within a lateral width of the seedling feeder. Drive transmission cases 38 transmitted to the travel devices 44 are each rotatably provided on both right and left sides of the travel vehicle body 40, and a steering handle 47 is provided in the rear part of the travel vehicle body 40. The front sides of the right and left main frames 103 are each mounted on a vehicle shaft cover 101 connected to the drive transmission cases 38, and the rear sides are each connected to both right and left sides of a handle frame 104 supporting the steering handle 47.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a transplanter for transplanting vegetable seedlings such as onions and lettuce into a field.

  BACKGROUND ART Conventionally, there is known a seedling transplanting machine for planting seedlings supplied from a seedling supplying device in which a plurality of seedling containers move around, and a transplanting machine capable of double-row planting on the left and right (Patent Document 1).

  This transplanter is equipped with a main frame that is curved from the vicinity of the rear of the mission case toward the rear in a side view. Further, in a plan view, the main frame is provided substantially at the left and right center of the machine body.

JP, 2009-131177, A

  However, in the transplanter of Patent Document 1, since the main frame is provided at the substantially left-right center position of the machine body, the members are arranged avoiding the main frame. As a result, it is necessary to set the operation locus that does not come into contact with the main frame even when it comes closest to the main frame, which limits the design of the machine body.

  Further, since each working device is mounted on one main frame, a load is likely to be accumulated in each part of the main frame, and there is a problem that the strength of the machine body is deteriorated with time.

  SUMMARY OF THE INVENTION In consideration of the conventional problems, an object of the present invention is to provide a transplanter that has a high degree of freedom in design even when avoiding a mainframe and can maintain a high body strength.

  In order to solve the above problems, the following technical measures have been taken.

  That is, the invention according to claim 1 is a left and right traveling device (44) for traveling in a field on a traveling vehicle body (40), a seedling feeding device (43) for feeding seedlings, and a seedling feeding device (43) A transplanter equipped with a planting device (20a, 20b) for receiving and planting in a field, wherein main frames (103) of the traveling vehicle body (40) are provided on both left and right sides of the machine body, and rear ends of the left and right main frames (103) are provided. The left-to-right distance between the parts is wider than the left-to-right distance at the front end portion, and is set within the left-to-right width of the seedling feeding device (43).

  According to a second aspect of the present invention, a traveling transmission case (38) for transmitting to the traveling device (44) is rotatably provided on both left and right sides of the traveling vehicle body (40), and a rear portion of the traveling vehicle body (40). The left and right main frames (103) have front and rear main bodies attached to an axle cover (101) connected to the transmission case (38), respectively. The transplanter according to claim 1, wherein the handle frame (104) supporting the steering handle (47) is connected to both left and right sides.

  According to a third aspect of the present invention, the left and right main frames (103) are located outside the body and between the front and rear of the rear side of the traveling device (44) and the front side of the planting devices (20a, 20b). The transplanter according to claim 1 or 2, wherein the transplanter is configured to be bent upward and at the bottom of the seedling supply device (43) to be bent rearward of the machine body.

  The invention according to claim 4 provides a transmission case (26) for transmitting a driving force to the seedling supply device (43) and the planting device (20a, 20b), and the seedling supply device on the transmission case (26). A supply support frame (107) for supporting (43) is provided, and a vehicle body control section (126) for an operator riding on the traveling vehicle body (40) to control the airframe is provided, and the supply support frame (107) is provided. The transplanter according to any one of claims 1 to 3, further comprising a support member (105, 106f, 106r) for mounting a control member of the vehicle body control section (126).

  In the invention according to claim 5, a front boarding step (113) is provided on the front side of the vehicle body of the traveling vehicle body (40) to allow a worker to get in and out of the front body, and a bumper (109) is provided between the left and right sides of the front boarding step (113). ) Is provided, and the front end portion of the bumper (109) is arranged on the front side of the vehicle body with respect to the front end portion of the front boarding step (113), and the transplanter according to any one of claims 1 to 4. did.

  According to a sixth aspect of the present invention, an engine (41) for generating a driving force in the traveling vehicle body (40) and a mission case (39) for branching and transmitting the driving force of the engine (41) are provided. 39) Bumper support frames (108) for supporting the bumper (109) are provided on both left and right sides of (39), and the left and right bumper support frames (108) are arranged so as not to contact the engine (41). The transplanter according to claim 5.

  According to the first aspect of the present invention, the left and right main frames (103) are formed with the left and right spacing portions at the rear end portions, so that the planting devices (20a, 20b), the control member, and the cable are aligned with the left and right spacing portions. And the like can be freely arranged, so that the degree of freedom in airframe design is improved.

  Further, the rear end portions of the left and right main frames (103) are housed within the left and right widths of the seedling feeding device (43), so that the left and right width of the rear portion of the machine body can be made compact.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the front portion of the main frame (103) is attached to the axle cover (101) connected to the traveling transmission case (38), and the rear portion is attached. By connecting to the left and right sides of the handle frame (104), a quadrangular shape is formed in a plan view, so that the strength of the machine body can be improved.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, by bending each part of the main frame (103), the traveling device (44) is rotated up and down to rotate the transmission case (38). Even if the vertical position of the vehicle is changed, it does not interfere with the main frame (103), so that the vehicle height adjustment range of the traveling vehicle body (40) is secured.

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the transmission case (26) is provided with a supply support frame (107) of the seedling supply device (43). As a result, since the transmission case (26) having high strength can be utilized as the support frame, sufficient airframe strength can be secured even if the number of parts is reduced.

  According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, the front end portion of the bumper (109) is located on the front side of the front end portion of the front boarding step (113). As a result, the bumper (109) comes into contact with the obstacle first, so that it is possible to prevent the front boarding step (113) from being damaged and prevent the passenger from getting on and off easily.

  According to the invention of claim 6, in addition to the effect of the invention of claim 5, the bumper (109) is firmly supported by mounting the bumper support frame (108) on the mission case (39). Damage is less likely to occur when the bumper (109) contacts.

  In addition, since the bumper support frame (108) is configured not to contact the engine (41), it is possible to prevent the impact and distortion due to the contact of the bumper (109) from being transmitted to the engine (41), and damage the engine (41). Is prevented.

Left side view of transplanter Right side view of transplanter Rear view of transplanter Front view of transplanter Top view of transplanter Bottom view of transplanter Plan view of the transplanter with a part of the structure on the traveling car body removed Plan view of the transplanter with some of the structure on the traveling vehicle body removed Perspective view of the transplanter with some of the structure on the traveling vehicle body removed Perspective view of the transplanter with some of the structure on the traveling vehicle body removed Main part plan view showing the area around the front bumper Side view of the main part showing the area around the front bumper Perspective view of the main part showing the area around the front bumper Side view showing the lifting mechanism and the inter-row adjustment mechanism of the left and right planting hoppers FIG. 3 is a plan view showing a lifting mechanism and a mechanism for adjusting the distance between the left and right planting hoppers. Rear view showing the lifting mechanism and the inter-row adjustment mechanism of the left and right planting hoppers FIG. 3 is a perspective view showing a lifting mechanism and a mechanism for adjusting the distance between the left and right planting hoppers. Rear view showing the main parts of the opening and closing mechanism of the planted hopper (A) A rear view of the main part showing the inter-row adjustment plate, (b) A front view of the main part showing the inter-row adjustment plate (A) Main part side view showing the lifting hydraulic cylinder and contraction restricting arm, (b) Main part side view showing the contraction restricting arm, (c) Main part rear view showing the contraction restricting arm Rear view of essential parts showing hydraulic cylinder for lifting and contraction restriction arm The top view which shows the star wheel which guides a seedling container by an arc part. Side view showing a star wheel guiding the seedling container with an arc Perspective view of essential parts showing a working state of a work seat provided with a seat suspension mechanism Perspective view of essential parts showing a non-used state of a work seat equipped with a seat suspension mechanism (A) Main part side view showing the seating sensor in a non-detection state, (b) Main part side view showing the seating sensor in a detection state Side view of essential parts of transplanter equipped with irrigation pump and check valve

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a left side view showing a transplanter 10 for transplanting onion seedlings as an example of a transplanter according to an embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is a rear view, and FIG. 4 is a front view. 5 is a plan view and FIG. 6 is a bottom view.

  In the following description, the side on which the steering handle 47 is arranged is the rear side, and the opposite side, that is, the side on which the engine 41 is arranged is the front side. The right-hand side is the right side and the left-hand side is the left side when facing the front of the machine.

  As shown in FIGS. 1 to 6, the transplanter 10 according to the present embodiment includes a traveling vehicle body 40 that allows the aircraft body to travel forward, a steering handle 47 provided on the rear portion of the traveling vehicle body 40 for walk control, and a field vehicle. The planting device 42 for planting seedlings and the seedling supplying device 43 for supplying seedlings to the planting device 42 are provided.

  The traveling vehicle body 40 is provided with a mission case 39 in the front of the machine body, and an engine 41 serving as a drive source in front of the mission case 39. Axle covers 101, which cover tread-adjustable axles for changing the left and right positions of the rear wheels 44, are connected to lower left and right sides of the transmission case 39 on the rear side of the body, respectively. The traveling transmission cases 38 for transmitting the driving force are mounted on the rear wheels 44 provided on the rear side of the machine body so as to be vertically rotatable.

  The left and right rear wheels 44 are arranged between the traveling transmission case 38 and the left and right sides of a main frame 103, which will be described later, to reduce the lateral width of the machine body. However, if the left and right rear wheels 44 can be attached to the outside of the machine body of the traveling transmission case 38 in order to correspond to the conditions such as the furrow width for planting seedlings, the applicable working conditions can be increased. ..

  To be more precise, the left and right axle covers 101 are rotatably mounted on inner axles (not shown) as fulcrums, the traveling transmission cases 38 are attached to these axle covers 101, and the lifting hydraulic cylinders 300 and The traveling transmission case 38 is vertically rotated by the axle cover 101 being rotated by the expansion and contraction of the rolling cylinder 310.

  Then, as shown in FIGS. 6 to 10, L-shaped connecting stays 102 in plan view are respectively provided on the upper portions of the left and right axle covers 101 on the rear side of the vehicle body, and the rear ends of the connecting stays 102 are connected to the front and rear sides of the vehicle body. The front ends of the main frames 103 whose longitudinal directions are connected to each other. The attachment positions of the left and right main frames 103 are inside the machine body with respect to the traveling transmission case 38.

  As shown in FIGS. 5 to 8, the left and right main frames 103 are linearly arranged in the machine front-rear direction. Between the front and rear positions of the attached hoppers 20a and 20b and the front side of the machine body, they are bent outside the machine body and above the machine body, that is, toward the upper side toward the machine body. Further, the main frame 103 is bent toward the rear side of the machine body at a position below both the left and right outer sides of the seedling feeding device 43 described later. As a result, the left and right sides of the rear end portions of the left and right main frames 103 are wider than the left and right sides of the front end portions.

  Then, as shown in FIGS. 3 and 6 to 8, the operator stands the rear end portions of the left and right main frames 103 on the rear portion of the machine body, and pushes down the rear portion of the machine body during turning traveling, storage operation, etc. A steering handle 47 for operating the aircraft in the traveling direction is attached to each of the left and right ends of the handle frame 104 in the left and right direction.

  As described above, by arranging the left and right main frames 103 with a space left and right, the constituent members are arranged in the left and right space portions between the main frames 103, and the main frame 103 does not easily divide the arrangement position of the members. Since the configuration is adopted, the degree of freedom in design is increased.

  Further, by bending the main frame 103 rearward of the front-rear center portion of the rear wheel 44 and at a position frontward of the planting hoppers 20a and 20b, the main frame 103 is bent outward and upward of the main frame 103. Since the bent portion is separated upward from the rear side, which has a large vertical movement amount when the traveling transmission case 38 is rotated, and also separated from the rear wheel 44, the main frame 103 prevents the vehicle height from being changed. Is prevented.

  Further, the bent portion of the main frame 103 toward the rear side of the machine body is configured to pass below the left and right sides of the seedling feeding device 43, and constitutes the seedling feeding device 43. It is possible to prevent the main frame 103 from hindering the movement of the plurality of seedling containers 22 that are transported to.

  Then, the front end portions of the left and right main frames 103 are connected to the axle covers 101 via the connecting stays 102, respectively, and the left and right rear end portions are connected to the handle frame 104, thereby making the frame structure of the transplanter rectangular. Since it can be configured in a frame shape, the strength of the machine body can be improved.

  As shown in FIG. 7 and FIG. 8, of the left and right main frames 103, mounting support plates 105 in a rearwardly inclined posture are provided on the outer sides of the left and right sides of the machine body and on the front side of the machine body with respect to the upward bending portion, Beam frames 106f and 106r are mounted between the left and right sides of the mounting support plate 105 at predetermined intervals in the front-rear direction. Of the front and rear beam frames 106f and 106r, the rear beam frame 106r located on the rear side of the vehicle body is disposed above the vehicle body with respect to the front beam frame 106f.

  At the center of the front and rear beam frames 106f and 106r in the left and right, that is, in the vicinity of an intermediate position in the left and right direction of the main body 103 and the left and right main frames 103, the operator puts the seedlings into the seedling container 22 up to a predetermined position. Supply support frames 107 that support the seedling supply devices 43 that are conveyed and supplied to the left and right planting hoppers 20a and 20b, respectively, are provided.

  A transmission case 26 that receives a driving force from the mission case 39 and is transmitted to the seedling supply device 43 and the vertical movement mechanism 21 of the left and right planting hoppers 20a and 20b is provided below the left and right supply support frames 107. The lower ends of the left and right supply support frames 107 are attached to the side surface of the transmission case 26 on the upper side of the machine body and the front and rear beam frames 106f and 106r.

  The left and right supply support frames 107 are L-shaped plate bodies in a side view, and the rear side of the machine body whose longitudinal direction is the vertical direction is bent toward the inside of the machine body.

  With the above-described configuration, the transmission case 26, which has a strong structure to house the transmission system, can be used as a support member for the left and right supply support frames 107, and therefore is deformed under the load of the seedling supply device 43. Therefore, it is possible to prevent the seedling supply device 43 from being tilted or the like and being unable to supply the seedlings.

  Further, a U-shaped bumper support frame 108 in a front cross-sectional view is provided so as to project to the front side of the machine body on the front side and the left and right sides of the body of the mission case 39. In front of the left and right bumper support frames 108, bumpers 109 that project toward the front of the machine are provided.

  As shown in FIG. 11 to FIG. 13, the bumper 109 includes a bumper plate 109a in which the front side and the left and right sides of the plate body are bent downward, a front weight 109b detachable from the upper surface of the bumper plate 109a, and a bumper plate. The bumper rod 109c extends in the left-right direction from 109a. The front weight 109b is made of a lump of a relatively heavy material such as iron and has a high hardness, and has a shape projecting to the front side of the machine body with respect to the bumper plate 109a.

  As a result, the front weight 109b, which is a lump having a weight and hardness, projects to the front of the machine most, so that it is possible to prevent the bumper plate 109a from being damaged when it comes into contact with an obstacle.

  On the body front side of the left and right bumper support frames 108, and on the lower side of the body, recesses (not shown) having openings on the lower side of the body are formed, and in these recesses, a front beam whose longitudinal direction is the left-right direction of the body. The frame 110 is inserted and fixed.

  By providing the front beam frame 110, the right and left bumper support frames 108 and the mission case 39 also assemble a frame in a quadrangle on the front side of the machine body, so that the strength on the front side of the machine body is improved. In particular, when the bumper 109 comes into contact with an obstacle, the left and right bumper support frames 108 are inserted and fixed in the front beam frame 110, so that damage or impact is less likely to propagate to the rear side of the left and right bumper support frames 108. Become.

  Further, when the mission case 39 is assembled to the airframe, the recesses of the left and right bumper support frames 108 are inserted into the front beam frame 110 and then moved in the left and right directions to fix the front and rear positions of the mission case 39 and then to the left and right positions. Therefore, it is possible to prevent the assembly work from being delayed due to the shift of the mounting position of the mission case 39.

  As shown in FIGS. 7 and 8, the rear portion of the engine 41 is loaded on the front side and the left and right sides of the mission case 39, and the front portion of the engine 41 is located near the left and right center portion of the front beam frame 110. Although it is configured to be loaded on the engine mount to be disposed, the bumper support frame 108 on the side where the engine 41 is disposed and the engine 41 are configured to be spaced apart in the vertical direction. That is, the bumper support frame 108 is not a member that receives the engine 41 from below.

  With the above-described configuration, it is possible to prevent an impact when the bumper 109 comes into contact with an obstacle from propagating from the bumper support frame 108 to the engine 41. Therefore, it is possible to prevent the engine 41 from being damaged or causing a malfunction due to the impact. it can.

  Further, even if the bumper support frame 108 is deformed by an impact, the loading state of the engine 41 is not easily affected, and even if the bumper 109 is damaged, work or movement can be performed by the power of the engine 41.

  Then, as shown in FIGS. 11 to 13, step support plates 111 having recesses in the left-right direction for mounting the bumper rods 109c are mounted on the left and right sides of the bumper plate 109a, respectively. The left and right step support plates 111 are configured to be supported via reinforcing arms 112 provided on the rear side of the body of the front beam frame 110 and on both left and right sides. The upper surfaces of the left and right step support plates 111 are flat, and a front boarding step 113 on which an operator puts his / her feet when getting on and off from the front side of the machine is attached thereto.

  The left and right front boarding step 113 is a structure in which a plurality of plate bodies are arranged in a trapezoidal frame to form large and small space portions, and when the worker puts his or her feet on the shoe sole, The existing soil is dropped downward. When the unevenness is formed on the upper surface of the plate body, the convex portion easily comes into contact with the groove of the shoe sole, and the soil removing effect is improved.

  This makes it difficult for the soil to be brought into the machine body, so that the labor required for removing the soil can be reduced.

  As described above, since the front boarding step 113 has a plurality of spaces formed, it is a structure that is likely to be deformed when it comes into contact with an obstacle, but because it is located on the rear side of the aircraft with respect to the bumper 109, The bumper 109 is likely to come into contact with the obstacle first. This prevents the front boarding step 113 from being damaged.

  Since both the left and right sides of the engine 41 and the mission case 39 need to pass when the operator gets on and off the front side of the traveling vehicle body 40, it is necessary to provide steps as scaffolding. However, since the mission case 39 is arranged on the lower side of the vehicle body than the engine 41, if the steps are common to the left and right, one step interferes with the mission case 39 and cannot be attached.

  Therefore, the front side step 114R on the side where the engine 41 is eccentrically provided is a flat plate, and is arranged so as to be inserted between the engine 41 and the bumper support frame 108 on the left and right sides. On the other hand, a notch 114La that exposes the mission case 39 is formed in the front step 114L provided on the side opposite to the engine 41 so as to cover the bumper support frame 108 on the left and right other sides.

  As described above, since the left and right front steps 114L and 114R can be mounted, the worker can get on and off on the side where it is easy to get on and off, so that the work efficiency is improved.

  Further, since the notch 114La is not formed on the side where the engine 41 is biased, a wide scaffold can be secured, and the strength of the right front side 114R can be improved.

  In each of the left and right front steps 114L and 114R, a single plate is bent, and the left and right front boarding steps 113 are provided with a lower step 115 and a lower step 115 that are substantially horizontal to the left and right front boarding steps 113. Has a rising inclination step 116 that is bent rearward and upward, and an upper step 117 that is formed by bending the rising inclination step 116 to be in a posture parallel to the lower step 115. If notches are formed in the rising slope step 116 and the upper step 117, respectively, a space for moving a hand or a tool during maintenance work of the mission case 39 and its surroundings is expanded, and work efficiency is improved.

  Then, on the left and right upper steps 117 and on the front side of the machine body with respect to the rear upper bent portions of the left and right main frames 103, a side step 118 is provided, which is a scaffold at the time of working while an operator gets on and off the machine from the side of the machine body. Provide each. The side part step 118 has a structure in which plate bodies are arranged vertically and horizontally in a frame to form a plurality of space parts, and the soil attached to the sole of the worker is dropped downward.

  A central step 119 is detachably provided between the left and right side steps 118, which serves as a foothold for a worker to board. Below the central step 119 and between the left and right of the left and right main frames 103, front and rear reinforcing beam frames 120f and 120r are provided at a front and rear interval, as shown in FIGS. The bolts for fixing the front and rear reinforcing beam frames 120f and 120r have a length that does not contact the lower surface of the central step 119 or is not exposed from the upper surface of the central step 119. When each is mounted, the bolt does not interfere with the movement of the foot of the worker on the central step 119, and the work efficiency is improved.

  The floor step 122 is configured as described above.

  The left and right front steps 114L and 114R, the left and right side steps 118, and the central step 119 are mounted independently of each other, that is, they are not tightened together by one mounting member (bolt or the like). As a result, when removing each step component during partial maintenance work, it is not necessary to remove another step component, and the efficiency of maintenance work is improved.

  In addition, by arranging the front and rear reinforcing beam frames 120f and 120r with a front-rear space, a lifting hydraulic cylinder 300, which will be described later, and a hydraulic balance balance having a rolling mechanism that makes the planting posture horizontal according to the horizontal inclination of the field scene. Since it becomes easy to perform the maintenance work of 303 from the traveling vehicle body 40, the work efficiency is improved.

  In addition, on both the left and right sides of the traveling vehicle body 40 on the front side of the machine body, and on the front side of the machine body with respect to the rear wheels 44, the horizontal frames 16 that are provided on the lower side of the front beam frame 110 and project in the left and right direction of the machine body are used for rolling. A front wheel 45 movably supported is provided.

  Then, the front ends of the wheel drive shafts extending outwardly from the transmission case 39 to the left and right sides are inserted into the rotation axis center position of the front portion of the traveling transmission case 38, so that the traveling portion system transmission in the transmission case 39 is changed. The motive power for traveling via the transmission portion is transmitted to the transmission mechanism in the traveling transmission case 38. The traveling power is transmitted to the rear wheel axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheels 44 are driven and rotated.

  The left and right side wheels (not shown) provided in the mission case 39 can be used to interrupt the drive of the left and right rear wheels 44. Therefore, when the vehicle body is turned, the side clutch is used to make one of the left and right rear wheels 44, which is the inside of the turning, into a non-driving state so that the vehicle can smoothly turn.

  Further, a drive means for rotating up and down for moving the rear wheel 44 up and down with the front side of the traveling transmission case 38 as a fulcrum is connected to the traveling transmission case 38. Specifically, the arm 13 extending upward is integrally attached to the attachment portion of the traveling transmission case 38 to the transmission case 39, and the arm 13 is fixed to the transmission case 39 so that the lifting hydraulic cylinder 300 is fixed. It is connected to both left and right sides of the connecting body attached to the tip of the piston rod. One of the left and right sides (right side) is connected by a connecting rod, and the other side (left side) is connected by a left and right horizontal control hydraulic cylinder that can be expanded and contracted according to the inclination of the machine body.

  When the lifting hydraulic cylinder 300 operates and its piston rod projects rearward of the machine body, the left and right arms 13 rotate rearwardly, and accordingly, the traveling transmission case 38 rotates downward and the machine body rises. On the contrary, when the piston rod of the lifting hydraulic cylinder 300 moves to the front of the machine body and retracts into the cylinder, the left and right arms 13 rotate forward, and the traveling transmission case 38 rotates upward accordingly. The aircraft descends.

  The lifting hydraulic cylinder 300 is operated by a ridge sensor 14 which is grounded on the ridge surface and operates in accordance with a change in the vertical distance between the machine body and the ridge surface. The operation of the ridge sensor 14 is an operation of detecting the height of the ridge upper surface with reference to the position of the machine body, and the machine body is set to a set height corresponding to the height of the ridge upper surface based on the detection operation of the ridge surface sensor 14. With the configuration, the lifting hydraulic cylinder 300 operates.

  Further, when the left / right horizontal control hydraulic cylinder expands / contracts, the left arm 13 connected to the left / right horizontal control hydraulic cylinder rotates to vertically move only the left rear wheel 44 to tilt the machine body left / right. .. The left-right horizontal control hydraulic cylinder is configured to operate based on the detection result of the sensor that detects the left-right inclination of the machine body with respect to the left-right horizontal machine, to make the machine body horizontal.

  The lifting hydraulic cylinder 300 is expanded and contracted by detection by the ridge surface sensor 14 or operation of a vehicle height adjusting lever 123 provided at the rear portion of the machine body to change the vehicle height. However, when the vehicle is stopped for a long time, a load due to the weight of the machine body is applied to the lifting hydraulic cylinder 300, and the hydraulic oil naturally leaks, so that the lifting hydraulic cylinder 300 contracts and the vehicle height becomes low. Sometimes.

  In particular, if the vehicle height is stopped for a long period of time, or if the vehicle height decreases during storage in a warehouse or the like, the ridge surface sensor 14 and the lower ends of the planting hoppers 20a and 20b may come into contact with the floor surface and be deformed. , There is a risk of damaging the floor. In addition, after a long break due to meals or the like, it may be necessary to readjust the vehicle height again, which may lead to a reduction in work efficiency and an improper adjustment may result in uneven planting depth.

  As shown in FIG. 20 and FIG. 21, the lifting hydraulic cylinder 300 includes a fixed cylinder case 301, a hydraulic balance 303 that is installed in the fixed cylinder case 301 and slides, and that supports an end of a sliding rod 302. The sliding rod 302 is composed of a spring 304 for urging the sliding rod 302 in the direction of increasing the vehicle height of the traveling vehicle body 40, and an arc-shaped spring cap 305 for restricting the expansion is provided at one end of the spring 304. Set up.

  A contraction restricting arm 306, which can be switched between a restricted state and a non-restricted state by a rotating operation, is rotatably provided on the upper side of the hydraulic balance 303, and when the contraction restricting arm 306 rotates toward the restricted state. The end of the contraction regulation arm 306 comes into contact with the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, so that the sliding rod 302 cannot physically move in the contraction direction.

  As shown in, the contraction regulating arm 306 is mounted on the hydraulic balance 303 on the base side through a torque spring 307, and contacts the fixed cylinder case on the end side so as to cover the outer circumference of the sliding rod 302. A restriction spacer 308 that is inserted between the front and rear of the hydraulic balance 303 and the hydraulic balance 303 and a restriction holder 309 that engages with the outer peripheral surface of the fixed cylinder case 301 in front of the spring 304 are provided.

  As shown in FIG. 20C, the restriction spacer 308 has a U-shape when viewed from the front so that the restriction spacer 308 surely contacts the outer periphery of the preliminary sliding rod 302, and the restriction holder 309 is attached to the fixed cylinder case 301. It is assumed that an arcuate cutout is formed in order to engage with each other. Further, the contact surfaces of the restriction spacer 308 and the restriction holder 309 may be coated with a soft material such as rubber in order to prevent the lifting hydraulic cylinder 300 from being scratched.

  The torque spring 307 biases the contraction regulation arm 306 toward the non-regulation state side, and in the non-regulation state, the regulation spacer 308 and the regulation holder 309 are completely retracted from the expansion / contraction region of the lifting hydraulic cylinder 300. The contraction regulation arm 306 is configured to rotate.

  The contraction restriction arm 306 can be switched between the restricted state and the non-restricted state by providing a dedicated manual operation lever and performing the operation from the floor step 122 of the traveling vehicle body 40. Since it is located near the center in the longitudinal direction of the machine body, it is necessary to project the manual operation lever from the upper surface of the floor step 122. If the manual operation lever protrudes from the floor step 122, the movement of the operator may be hindered, and the operator's foot may come into contact with the operator to unintentionally switch between the regulated state and the non-regulated state. Even if the surface sensor 14 detects that the field height has become low, the lifting hydraulic cylinder 300 may not be able to contract, and the planting depth may become shallow.

  Further, since it is necessary to operate the manual operation lever on the traveling vehicle body 40 after adjusting the vehicle height, the number of work steps will be increased.

  In order to prevent the occurrence of these problems, the switching operation of the contraction restricting arm 306 is performed by expanding / contracting the lifting hydraulic cylinder 300 provided on the control panel 47a at the center of the left / right of the control handle 47 of the traveling vehicle body 40 for traveling. The vehicle height adjusting lever 123, which adjusts the vehicle height of the vehicle body 40, is provided with the cooperation wire 124, and the operation is performed in conjunction with the operation of the vehicle height adjusting lever 123.

  The vehicle height adjusting lever 123 has a “high” position for increasing the vehicle height on the front side of the machine body, and a “low” position for decreasing the vehicle height on the rear side of the machine body, and is elevated from the “low” position toward the outer side of the machine body. It has a “fixed” position for stopping the expansion and contraction of the hydraulic cylinder 300 and maintaining the vehicle height. When the vehicle height adjusting lever 123 is operated to the “fixed” position, the cooperation wire 124 rotates the contraction restriction arm 306 to the restriction state side. On the other hand, when the vehicle height adjusting lever 123 is moved from the “fixed” position and the cooperation wire 124 is loosened, the contraction regulating arm 306 is rotated to the non-regulating state side by the urging force of the torque spring 307.

  With the above configuration, when the contraction restricting arm 306 is operated in the restricting state, the restricting spacer 308 enters between the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, and the lifting hydraulic cylinder 300 cannot contract. It is possible to prevent the vehicle height from decreasing due to its own weight.

  This eliminates the need to readjust the vehicle height, improves work efficiency, and prevents the planting hoppers 20a and 20b and the ridge surface sensor 14 from being pressed and deformed on the floor surface.

  In addition, the restriction holder 309 is prevented from biting into the fixed cylinder case 301, whereby the contraction restriction arm 306 is prevented from shifting the contact position and the lifting hydraulic cylinder 300 is maintained in a contractable state.

  Further, since the contraction regulating arm 306 is switched between the regulated state and the non-regulated state in conjunction with the operation of the vehicle height adjusting lever 123 at the rear portion of the traveling vehicle body 40, it is not necessary to separately provide an operation member for the contraction regulating arm 306 The number can be reduced.

  Alternatively, since the operation member of the contraction regulation arm 306 does not project onto the upper surface of the floor step 122 and the regulation state and the non-regulation state are prevented from being unintentionally switched, the planting according to the unevenness of the ridge surface is prevented. You can plant seedlings at a depth.

  Further, since the cooperation wire 124 is configured to switch the contraction restricting arm 306 only to the restricted state side, when the cooperation wire 124 is broken or is excessively extended and bent, a torque spring is generated. Since the contraction restricting arm 306 is rotated to the non-restricted state side by the urging force of 307, it is not necessary to rotate the contraction restricting arm 306 sandwiched between the fixed cylinder case 301 and the hydraulic balance 303 during repair. Therefore, the labor required for repair work can be reduced.

  In the above configuration, the contraction regulation arm 306 is rotated by the cooperation wire 124 into the regulation state and is rotated by the torque spring 307 into the non-regulation state. However, the contraction regulation arm 306 is rotated by the torque spring 307 into the regulation state. Alternatively, the linking wire 124 may be rotated to the non-restricted state.

  Specifically, when the vehicle height adjusting lever 123 is in the “high” position or the “low” position, the cooperation wire 124 rotates the contraction regulating arm 306 to the non-regulating state side, and operates the “fixed” position. Then, the cooperation wire 124 is loosened, and the contraction regulation arm 306 is rotated to the regulation state side by the urging force of the torque spring 307.

  In the above configuration, when the cooperation wire 124 is loosened by operating the vehicle height adjusting lever 123 to the “fixed” position, the contraction restricting arm 306 immediately rotates to the restricting state side by the urging force of the torque spring 307. Since the contraction amount of the lifting hydraulic cylinder 300 due to the operation of the high adjustment lever 123 can be suppressed to a smaller value, the vehicle height can be maintained more reliably.

  As shown in FIGS. 1, 2 and 5, the horizontal frame 16 is mounted on the front beam frame 110 so as to be capable of rolling rotation about an axis in the front-rear direction. , Long vertical frames 17 are attached. The left and right front wheels 45 are rotatably attached to the front wheel axle 18 fixed to the side of the lower end of the vertical frame 17. Therefore, the left and right front wheels 45 are capable of rolling around the longitudinal center axis in the left and right center of the machine body. Further, the vertical frame 17 is provided so as to be adjustable up and down with reference to the left and right side portions of the horizontal frame 16, so that the height of the front wheel 45 can be adjusted.

  The steering handle 47 is provided on the rear part of the machine body, and is located on the rear side of the machine body from the rear wheel axle 12 of the rear wheel 44. Specifically, it is attached to the rear end of the machine body frame 19 whose front end is fixed to the mission case 39.

  The machine body frame 19 extends rearward at the left-right center of the machine body, and extends obliquely rearward and upward from the front-rear intermediate portion.

  The steering handle 47 extends rearward from the rear end of the machine frame 19 to the left and right, and each rear end serves as a grip portion of the steering handle 47.

  In addition, in FIG. 2, the grip portion is divided into the left and right, but the left and right rear end portions of the steering handle 47 may be connected to each other left and right, and the connected portion may be used as the grip portion.

  The planting device 42 has a plurality of beaker-shaped planting tools whose tips are directed downward, and moves the planting tools up and down at a position where the lower end of the planting device is above the field scene and below the field scene. A vertically moving mechanism 21 for moving and a closed state in which the lower end of the beak-shaped planting tool is closed to receive seedlings from above and the seedlings can be stored inside, and the lower end of the planting tool is opened to the left and right to be stored inside. And an opening / closing mechanism for opening / closing the planting device in an open state in which the seedlings can be released downward.

  As shown in FIGS. 1 to 6, the planting device 42 of the present embodiment has a double-row planting configuration in which a first planting hopper 20a and a second planting hopper 20b are arranged side by side. The first hopper with planting 20a and the second hopper with planting 20b are respectively attached to vertical movement mechanisms 21 provided on both left and right sides of the transmission case 26 that is transmitted from the transmission case 39.

  The vertical movement mechanism 21 is composed of a pair of upper and lower link arms 21a and 21b. The upper and lower link arms 21a and 21b are mounted on the transmission case 26 such that their front end portions are vertically rotatable, and at the same time, rear end portions thereof are mounted. The part side is mounted between the left and right link holders 210, 210 so as to be vertically rotatable. The front end of the upper link arm 21a is provided at a position separated from the rotation axis of the non-circular cam 211 rotatably mounted on the transmission case 26 toward the outer peripheral edge side, and is vertically moved by the vertical movement mechanism 21. , 20b are swung from front to back.

  The transmission case 26 is fixed to the upper portion of a mounting member whose lower portion is fixed to the machine body frame 19. Further, the rear end portions of the planting hoppers 20a and 20b and the vertical movement mechanism 21 are located on the rear side of the vehicle body with respect to the rear end portions of the left and right rear wheels 44 and 44 in a side view, Is a space without other members.

  In particular, the position where the front end of the upper link arm 21a is attached to the non-circular cam 211 is set in the static locus of the planting hoppers 20a and 20b from the time when the seedlings are received to the time when the seedlings reach the bottom dead center. The position 20b is changed from the backward tilted position to a position substantially vertical to the field scene, and is changed to a position changed from the vertical position to the forward tilted position when starting to rise from the bottom dead center.

  As a result, in the movement loci of the planting hoppers 20a, 20b, it is possible to shorten the time and distance that the planting hoppers 20a, 20b enter the soil in order to plant seedlings. The small size prevents seedlings from falling and disturbing the planting posture.

  Further, since the planting hoppers 20a, 20b are in a posture in which they are greatly inclined forward near the top dead center / BR> T, the seedlings to be fed by the worker are transported to a predetermined position and dropped and supplied by the seedling feeding device 43. Since the upper ends of the planting hoppers 20a and 20b can be brought close to the positions, seedlings are not supplied into the planting hoppers 20a and 20b, and it is possible to prevent the occurrence of a stock stall.

  When the planting hoppers 20a and 20b are inclined when the seedlings are dropped and supplied, the seedlings that have entered the planting hoppers 20a and 20b are slid and moved from the upper side to the lower side. Therefore, even if the seedlings stay in the planting hoppers 20a, 20b and the planting hoppers 20a, 20b enter the soil, the seedlings are not planted and the occurrence of a stunt is prevented.

  In addition, between the non-circular cam 211 and the upper link arm 21a, an adjusting plate 212 having a plurality of arc-shaped adjusting slots 212a is formed, and a fixing member such as a bolt is inserted into the adjusting slots 212a. By changing the position, the operator can adjust the inclination angle of the planted hoppers 20a and 20b to the front and rear.

  As a result, since the front and rear inclination angles of the planting hoppers 20a and 20b can be appropriately adjusted according to the working conditions such as the length of the seedlings and the planting depth, the seedlings can be planted in a posture and a planting depth suitable for growing. , Seedlings grow better.

  The up-and-down driving force of the up-and-down moving mechanism 21 is transmitted from the up-and-down driving shaft 213 provided on the rear side of the machine body with respect to the rotation shaft of the non-circular cam 211. An unequal circular elevating cam 214 is mounted on the elevating drive shaft 213, and an elevating crank 215 for vertically rotating the upper link arm 21a is provided between the elevating cam 214 and the upper link arm 21a. The lower link arm 21b rotates up and down in conjunction with the vertical movement of the upper link arm 21a, and the vertical movement mechanism 21 is a parallel link.

  The elevating crank 215 has one end attached to a rotating shaft extending from the elevating cam 214 to the outside of the machine body, and the other end attached to a connecting plate 216 provided inside the machine body of the upper link arm 21a, and the loci of the planting hoppers 20a and 20b. Is suitable for planting seedlings and receiving seedlings from the seedling supply device 43.

  The connecting plate 216 is arranged to project downward from the upper link arm 21a and the lower end thereof is positioned slightly above the upper end or the upper end of the lower link arm 21b. The other end of the elevating crank 215 is mounted near the part.

  With the above configuration, since the elevating crank 215 can be arranged closer to the lower part of the machine body, the center of gravity is closer to the lower part of the machine body, so that the machine body is less likely to be tilted back and forth due to the weight of the members, etc. Stabilize.

  Further, by mounting the other end of the lifting crank 215 to the connecting plate 216, the upper link arm 21a is configured not to be directly loaded by the lifting crank 215, so that the durability of the upper link arm 21a is improved. ..

  As described above, since the load applied by the lifting operation is small, it is preferable that the upper and lower link arms 21a and 21b are formed of hollow square pipes. When the upper and lower link arms 21a and 21b are lightweight, the load transmitted to the transmission case 26 through the elevating crank 215 and the elevating cam 214 is small, and the durability of the transmission case 26 is also improved.

  Further, the rising speed does not become too slow due to the weight, and the descending speed does not become too fast, the ascending and descending loci of the planting hoppers 20a and 20b are stable, and the planting posture and planting depth of the seedlings are stable, It grows well.

  Further, by disposing the elevating cam 214, the elevating crank 215, and the connecting plate 216 between the left and right sides of the transmission case 26 and the vertical movement mechanism 21, the upper and lower link arms 21a and 21b do not interfere with each other during vertical rotation. Both the upper and lower link arms 21a and 21b can be formed in a straight line, and the configuration can be simplified and the strength can be maintained.

  The upper and lower link arms 21a and 21b have different front and rear lengths so that the raising and lowering and the forward and backward tilting of the planted hoppers 20a and 20b are more suitable for planting seedlings. In this case, the upper link arm 21a is shorter than the lower link arm 21b.

  The rear end portions of the upper and lower link arms 21a and 21b are mounted on the left and right of the left and right link holders 210 and 210 with a vertical gap therebetween, but at this time, the mounting position of the upper link arm 21a is set to the lower side. The link arm 21b is positioned on the front side of the machine body with respect to the mounting position.

  As a result, when the planted hoppers 20a, 20b rise to the vicinity of the top dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a, 21b becomes long, and the back-and-forth swing amount of the planted hoppers 20a, 20b is increased. Therefore, the front and rear position amounts above the planting hoppers 20a and 20b are less likely to change in the vicinity of the drop supply position of the seedling supply device 43, and the failure to receive the seedlings is reduced.

  Further, when the planted hoppers 20a, 20b rise to the vicinity of the bottom dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a, 21b becomes short, and the back-and-forth swing amount of the planted hoppers 20a, 20b is reduced. Since it becomes large, the planted hoppers 20a and 20b can be changed from the rearwardly tilted posture to the forwardly leaned posture, and the planted hoppers 20a and 20b are prevented from coming into contact with the seedlings and falling or being damaged.

  An opening / closing arm 218 having an opening / closing wire 220 for operating an opening / closing mechanism for opening / closing the planted hoppers 20a, 20b according to the ascending / descending position is attached to the front end of the lower link arm 21b. Attach to. A contact roller 219 is provided on the rear side of the upper part of the opening / closing arm 218, which comes into contact when a portion of the non-circular cam 211 having a diameter equal to or larger than a certain value passes.

  When the non-circular cam 211 comes into contact, the opening / closing arm 218 rotates forward and pulls the opening / closing wire 220, so that the planting hoppers 20a and 20b close, and when the non-circular cam 211 comes out of contact, the opening / closing arm 218 rotates backward. When the open / close wire 220 is loosened by moving, the planting hoppers 20a and 20b are opened.

  In addition, the planting hoppers 20a and 20b are opened during planting seedlings from the middle of descending and starting to rise, and are closed during planting seedlings and starting to rise, then receiving seedlings and descending again. The non-circular cam 211 has a corresponding shape.

  On the rear side of the left and right hopper holders 210, 210, cutouts 221 are formed in a U shape opening to the rear side of the machine body. It is assumed that the constituents of the hopper holder 210 project to the rear of the machine body at the upper and lower portions of the cutout portion 221.

  Further, rear side portions of the left and right hopper holders 210, 210 are provided with a U-shaped striation adjustment plate 222 shown in FIGS. Left and right cut grooves 222b are formed in the upper and lower front protrusions 222a of the inter-row adjustment plate 222 at substantially the same left and right intervals as the left and right hopper holders 210, 210, respectively, and the cut grooves 222b are formed. ... Each of them is inserted into the hopper holders 210, 210 and mounted. At this time, a square adjustment space 223 is formed between the notch 221 and the inter-row adjusting plate 222 in a side view.

  The striation adjusting plate 222 is located at the center of the left and right behind the upper and lower link arms 21a and 21b that form the up-and-down moving mechanism 21, and projects substantially the same length in the left-right direction. On the wall surface of the, the inter-slot adjustment elongated hole 224 is formed in the left-right direction.

  A hopper holder 225 for supporting the planted hoppers 20a and 20b on the rear side of the machine body is provided at the rear portion of the inter-row adjusting plate 222. The hopper holder 225 has an upper portion bent toward the front of the machine body in an L shape to form a connecting portion 225a, and on both left and right sides, projecting hoppers 20a and 20b and fastening members 209 such as bolts are projected to the rear side of the machine body. The connecting portions 225b and 225b that are connected to each other are formed. Further, one or a plurality of mounting holes (not shown) for fastening members 209 such as bolts are formed in the vertical wall surface below the connecting portion 225a and above the connecting portions 225b and 225b. In the hopper holder 225, the L-shaped connecting portion 225a in a side view is arranged along the upper side and the rear side of the inter-row adjusting plate 222, and the inter-row adjusting long hole 224 and the mounting hole are located at the same vertical height. Mounting. Accordingly, when the fastening member 209 is removed or loosened, the hopper holder 225 can be slid in the left-right direction along the inter-row adjustment plate 222.

  When adjusting the left and right planting intervals of the left and right planting hoppers 20a, 20b, that is, the striations, the fastening member 209 is removed or loosened as described above, and the hopper holder 225 is set within the left and right width of the striation adjusting plate 222. It is determined by moving to the position of (4) and attaching or tightening the fastening member 209.

  The fastening member 209 is configured to be inserted through the mounting hole of the hopper holder 225 and screwed into or pulled out from a nut provided on the adjustment space 223 side so as to be able to switch between a position fixing state and a line adjusting state.

  In the above configuration, since the fastening member 209 is inserted into the inter-slot adjustment elongated hole 224, the fastening member 209 serves as a stopper and the hopper holder 225 can be prevented from falling off from the left and right end portions of the inter-spacing adjustment plate 222.

  In the striation adjustment structure of the present case, which is provided with the left and right planting hoppers 20a and 20b, the left and right planting hoppers 20a and 20b have the largest stride spacing because the left and right straddle adjusting plates 222 and 222 can have a large left and right spacing. Even when the hopper holders 225 and 225 are moved to the inner ends of the body of the inter-row adjusting plates 222 and 222, the left and right planting hoppers 20a and 20b are arranged so as not to interfere with each other. As a result, the distance between the threads can be set narrower, and it is possible to cope with a wider variety of working conditions than before.

  Further, since the striation adjustment plate 222 is provided at the rear part of the vertical movement mechanism 21, it is possible to prevent the striation adjustment plate 222 from interfering with the lateral movement of the planting hoppers 20a and 20b. The line spacing can be set in a wider range across the width, and it is possible to cope with various working conditions.

  Further, the adjustment space 223 is formed between the front and rear of the link holders 210, 210 and the opening of the striation adjusting plate 222, so that the worker is behind the left and right rear wheels 44, 44 and outside the machine body. Since the work of tightening or loosening the nut can be performed in the space portion of, the spacing adjustment work can be performed efficiently.

  If the thickness of the nut is less than half the front-rear width of the adjustment space 223, a work space for inserting a tool for nut attachment / detachment in the left / right center portion of the inter-row adjustment plate 222, that is, behind the upper and lower link arms 21a, 21b. Therefore, the position where the planting hoppers 20a and 20b cannot be fixed does not occur within the left and right width of the inter-row spacing plate 222, and the required inter-row spacing can be set.

  In the above-mentioned inter-row adjusting mechanism, the left and right planting hoppers 20a and 20b are basically moved in symmetrical directions. For example, when the line spacing is 70 cm, the left and right planting hoppers 20a and 20b are moved to the left and right outer ends of the line spacing adjusting plates 222 and 222, and when the line spacing is 30 cm, the left and right planting hoppers are attached. The hoppers 20a and 20b are respectively moved to the left and right inner end portions of the strip adjusting plates 222 and 222. The other striations are set by moving them to any positions within the left and right widths of the striation adjustment plates 222, 222, but it should be easy for the operator to visually understand how many cm the striations are set. It is advisable to provide an indicator on the strip adjustment plates 222, 222. This indicator is to be pasted with a sticker, written, or engraved on the inter-row adjustment plate 222.

  However, depending on the type of crop and the field environment, it is possible to plant more than two rows, for example four rows, on a wide ridge. When one row of ridges is reciprocated and four rows are planted, both the left and right planting hoppers 20a and 20b are attached to the left and right sides of the row adjustment plates 222 and 222 in order to offset the planting position to the left and right sides in the traveling direction of the ridges. It is possible to plant seedlings even if they are moved to. As a result, it is possible to deal with even more diverse work conditions.

  The planted hoppers 20a and 20b cover the hopper holder 225 with a hopper cover 226 facing the rear side of the machine body, and cut open upper surfaces on the rear side and the left and right sides of the machine body to form an open space. Further, left and right rotation supporting shafts 227, 227 are provided respectively in front of and behind the rear wall surface of the hopper holder 225 and the rear wall surface of the hopper cover 226, and the rotation supporting shafts 227, 227 respectively have rotating arms. 228 and 228 are rotatably attached. Most of the left and right rotating arms 228, 228 are projected upward from the open space.

  The left and right rotary support shafts 227, 227 are arranged below the cutout portion 221 of the link holders 210, 210 and the inter-row adjustment plate 222 in the machine body.

  As a result, the rotation support shafts 227, 227 on the side of the hopper holder 225 can be arranged on the lower side of the striation adjusting plate 222 and without a large front-rear distance from the link holders 210, 210. The front and rear positions do not move too far behind, and a compact structure can be achieved.

  Of the rotary arms 228, 228, the cable outer of the opening / closing wire 220 is attached to the outside of the machine body, and the cable inner is connected to the inside of the machine body. 228 is configured to rotate.

  Further, the left and right pivoting support shafts 227, 227 are respectively mounted with U-shaped opening / closing arms 230, 230 for mounting a pair of left and right hopper stays 229, 229 on the lower side so as to be pivotable to the left and right. The opening / closing arms 230, 230 have a shape that covers the front and rear and the upper side of the hopper stays 229, 229. As shown in FIG. 18, the upper and lower sides of the front and rear surfaces are gears in which unevenness in the left and right direction is alternately meshed in the vertical direction. Portions 230a, 230a are formed respectively. The gears 230a and 230a are meshed with each other to synchronize the amount of rotation of the opening and closing arms 230 and 230 when the arms are opened and closed, and the seedling hoppers 20a and 20b have an opening that allows the seedlings to be uniformly released.

  Support pins 232 and 232 are provided on the left and right sides of the front and rear surfaces of the open / close arms 230 and 230, respectively, and the left and right open / close arms 230 and 230 are brought close to each other. The springs 233 that urge in the direction are respectively arranged in the front and rear.

  Further, the hopper stays 229, 229 connect the front and rear upward bent portions to the front and rear portions of the opening / closing arms 230, 230, and a pair of left and right hopper constituent bodies 231 and 231 are provided on the inside of each body at the bottom in the front and rear direction. A semi-circular cutout (not shown) for mounting is formed. The left and right hopper constructing bodies 231 and 231 are configured such that when they are opened, the lower end portions are greatly opened in the left-right direction, and when they are closed, the end faces are substantially evenly contacted vertically. In addition, the vicinity of the lower end portions of the hopper components 231 and 231 are formed in a plate shape to reduce the resistance when entering the soil.

  Further, the hopper cover 226 is provided with an opening (not shown) having substantially the same diameter as the uppermost parts of the left and right hopper components 231 and 231 or a slightly smaller diameter, and the seedling supply device 43 supplies the opening. The seedling guides 234 that guide the inside of the left and right hopper components 231 and 231 are inserted and attached. The diameters of the left and right hopper structures 231 and 231 near the upper end are larger than the diameters of the upper and lower parts near the upper end.

  In the seedling guide 234, the lower side of the hopper cover 226 has substantially the same diameter, and the upper side of the hopper cover 226 has a larger diameter toward the upper side of the machine body and has a tapered shape in side view and rear view.

  Since the upper side of the seedling guide 234 has a tapered shape, the diameter on the upper end side is maximized, so that the seedlings can be received even if the position where the seedlings are dropped and supplied is slightly shifted, and the planting hoppers 20a and 20b are used as seedlings. Is prevented from failing to be planted.

  In addition, the diameter of the lower part of the seedling guide 234 is set to be substantially the same as or slightly smaller than the diameter of the upper end of the hopper components 231 and 231, so that the diameter between the seedling guide 234 and the hopper components 231 and 231 is reduced. Since there are no gaps, the seedlings can be taken over without fail, and the seedlings can be planted without fail.

  Each seedling container 22 has a tubular body that opens up and down, and a bottom lid that opens and closes the lower opening of the tubular body, and is connected to each other in a loop.

  The moving mechanism 23 connects the connected seedlings with an oval loop path that is long in the left-right direction in a plane view of the machine in a state where each connected seedling container 22 passes near the upper portions of the left and right planting hoppers 20a and 20b. The container 22 is rotated counterclockwise.

  The seedling dropping mechanism opens the bottom lid of the seedling container 22 at a position corresponding to the seedling container 22 and above the planting hoppers 20a and 20b.

  In the present embodiment, a cylindrical outer peripheral portion is formed on the outer periphery of the seedling container 22, and an engaging portion (round hole) that rotatably connects from the outside is provided on the outer peripheral portion of the cylinder to provide two seedling container 22. A plurality of connected bodies were formed to connect the. Then, the engaging portion of the connecting body is rotatably connected to the cylindrical outer peripheral portion of the seedling accommodation body 22, and the adjacent seedling accommodating body 22 is rotatably coupled with the cylindrical outer peripheral portion as a rotation axis. The plurality of seedling containers 22 are connected to each other. That is, the seedling container 22 and the connecting body are connected like an endless chain.

  As a result, the seedling container 22 does not change the interval between the adjoining seedling container 22 in the linear portion 28 that moves linearly or in the arcuate portion 29 that moves in an arc shape. At locations where seedlings are supplied to the planting hoppers 20a, 20b, positional deviations based on the left and right planting hoppers 20a, 20b of the seedling container 22 are unlikely to occur, and the seedlings are appropriately supplied to obtain appropriate seedlings. Can be planted.

  The moving mechanism 23 of the seedling feeding device 43 winds the seedling container 22 that is connected to each other like an endless chain around the arcuate notches on the outer circumference of the left and right sprockets, and takes out the left and right sprockets from the transmission case 26. Each seedling container 22 is configured to rotate around by being driven and rotated by the power.

  The orbital movement path around which the seedling container 22 circulates is long with a linear portion 28 that extends in the left-right direction in plan view and an arcuate portion 29 that bends in an arc shape from the linear portion 28 to the front side or the rear side by a sprocket. It has a circular shape and is arranged on the inner side of the vehicle body with respect to the left and right rear wheels 44.

  The seedling container 22 of the seedling feeding device 43 relatively stably moves in a predetermined direction in the linear portion 28, but in the arc-shaped portions 29 on both left and right sides, the interval between the seedling containers 22 becomes narrow or wide. There is a possibility that the seedling supply device 43 may be damaged due to load on the drive of the seedling supply device 43, or the timing of seedling drop supply may become unstable. In order to prevent this, star wheels 240, 240 that are driven to rotate are provided at the inner peripheral edge portions of the plurality of seedling containers 22 and on the left and right outer sides of the seedling feeder 43, respectively. Protrusions are formed at equal intervals on the outer peripheral edge of 240. By inserting these protrusions into the gaps of the seedling container 22, the positions of the seedling containers 22 when passing through the arc-shaped portions 29 on both the left and right sides of the seedling feeding device 43 are maintained, respectively, to thereby prevent overload. It prevents the occurrence of seedlings and the timing of seedling drop supply.

  However, during the work of planting seedlings, the projections of the star wheel 240 are constantly in contact with the seedling container 22, so that the shape of the projections may change due to wear and may be easily damaged by load accumulation. If the deformed or damaged star wheel 240 is used as it is, the conveyance interval of the seedling container 22 becomes unstable, and the timing of dropping and supplying seedlings may be disturbed, which may hinder the planting work.

  In order to solve this problem, as shown in FIG. 22 and FIG. 23, the rotation support shafts 241 protruding downward are provided on the projections of the star wheel 240, and the feed roller 242 can be rotated around the rotation support shaft 241. Attach to.

  As a result, the protrusion of the star wheel 240 does not directly contact the seedling container 22, so that deformation of the protrusion and accumulation of load are less likely to occur, and the seedling drop supply timing is stabilized.

  Further, by making the feed roller 242 in contact with the seedling container 22 rotatable, wear of the feed roller 242 is reduced, and the frequency of parts replacement is prevented from increasing.

  It should be noted that by covering the outer peripheral surface of the feed roller 242 with a coating member having a high coefficient of friction and elasticity, such as rubber, or coating the feed roller 242, the wear of the feed roller 242 can be further reduced and the grip force can be increased by the friction force. The improvement is achieved and the transportation of the seedling container 22 is stabilized.

  The left and right planting hoppers 20 a and 20 b are arranged rearward of the position of the rear wheel axle 12.

  The seedling feeding device 43 is configured to feed the seedlings while the seedling container 22 makes one round movement in accordance with the left and right planting hoppers 20a and 20b.

  The seedling hoppers 20a, 20b are supplied with seedlings from the seedling container 22 at the first drop supply position 31a and the second drop supply position 31b, respectively.

  And the seedling container 22 which accommodates the seedlings dropped and supplied corresponding to the left and right planting hoppers 20a and 20b is separately provided, and above the left and right planting hoppers 20a and 20b to which the seedling container 22 corresponds. The bottom lid is opened only when it comes, and the bottom lid is not opened above the unsupported left and right planting hoppers 20a and 20b.

  That is, the seedling container 22 corresponding to the planted hopper 20a only comes to the first drop supply position 31a, and the seedling container 22 corresponding to the planted hopper 20b only comes to the second drop supply position 31b. The bottom cover is opened and seedlings are supplied to the corresponding planting hoppers 20a and 20b.

  The first drop supply position 31a and the second drop supply position 31b are configured to be movable to corresponding positions when the distance between the left and right planting hoppers 20a and 20b is adjusted.

  The operating cycle of the moving mechanism 23 is set to be synchronized with the operating cycle of the vertical movement mechanism 21, and the seedling housings 22 corresponding to the left and right planting hoppers 20a and 20b are combined into one seedling housing unit. By configuring the plurality of seedling container units to be connected, the seedling container 22 passes through the left and right drop supply positions 31a and 31b in series while the seedling supply is performed corresponding to the left and right planting hoppers 20a and 20b. In order to prevent seedling container 22 in which seedlings can be supplied without leakage and seedlings have not been supplied after passing through left and right drop supply positions 31a, 31b, left and right planting hoppers 20a, 20b are fully provided. It is structured so that seedlings can be supplied accordingly.

  In the transplanting machine 10 of the present embodiment, the soil cover crushing wheel 37, which is used to suppress the soil cover according to the seedlings planted by the left and right planting hoppers 20a and 20b, is provided at the seedling planting points of the left and right planting hoppers 20a and 20b. Are provided near the rear left and right sides. The left and right soil-covering wheels 37 are individually attached to support arms that are vertically rotatable.

  The left and right planting hoppers 20a and 20b can adjust the left and right positions according to the work conditions for planting seedlings, and can change the striations, but the ridge surface sensor 14 is grounded according to the set striations. If the position is not changed, the detection accuracy may decrease.

  As described above, the traveling vehicle body 40 has a configuration in which the left and right traveling transmission cases 38 are vertically rotated by the lifting hydraulic cylinders 300 to change the planting depth, but the left and right planting hoppers 20a, 20b. In order to make the planting depth of each of the left and right traveling transmission cases 38 as appropriate as possible, a rolling control for separately rotating the left and right traveling transmission cases 38, in this case the traveling transmission case 38 on the left side of the machine, up and down is also incorporated. ..

  Specifically, a rolling cylinder 310 is arranged between the left transmission transmission case 38 and the left end of the body of the hydraulic balance 303, and the rolling cylinder 310 is rolled in accordance with the difference between the vertical rotation amounts of the left and right soil-covering wheels 37. The configuration is such that the cylinder 310 is extended or contracted.

  Since the rolling cylinder 310 is provided close to the left side of the machine body, the ridge surface sensor 14 can easily balance the left and right of the machine body when the front side of the planting hopper 20b on the right side of the machine body is detected.

  Therefore, as shown in FIGS. 6 and 8, the ridge sensor 14 is attached to the adjustment base plate 14a provided on the bottom beam frame 133 provided below the left and right main frames 103 and the adjustment base plate 14a in the left-right direction. It is composed of a ground plate 14b whose position is adjustable.

  A left-right adjustment slot 14c is formed on the rear side of the body of the adjustment base plate 14a, and the ground plate 14b is positioned in the left-right direction along the adjustment slot 14c by a fixing member such as a bolt. By being fixed, the detection position of the ridge sensor 14 is set.

  With the above configuration, the detection position of the ridge surface sensor 14 can be adjusted to an appropriate position in accordance with the striation setting of the left and right planting hoppers 20a and 20b, so that automatic control of the planting depth according to the set striation is more appropriate. The planting accuracy of seedlings is improved.

  The transplanter of the present case is provided with a working seat 46 on which a worker who supplies the seedlings to the seedling supply device 43 gets on to perform the seedling supply work. Specifically, the work seat 46 is arranged rearward at the center of the machine body on the front side of the seedling feeder 43. The operator sitting on the work seat 46 sits in a rearward facing posture toward the front side portion of the seedling feeding device 43, and the front side portion of the seedling feeding device 43, in particular, the front straight line in the orbital movement path of the seedling container 22. Seedling supply work is performed corresponding to the portion 28.

  A main clutch lever 125 is provided on the left and right sides of the control panel 47a and is installed in the mission case 39 to turn on / off the transmission of driving force to the left and right traveling transmission cases 38 and the transmission case 26.

  In the transplanter of the present invention, the operation of the operator by the steering handle 47 at the rear of the machine is performed when moving to the field, unloading from the transportation means, storing in the warehouse, or turning at the field edge. .. On the other hand, at the time of planting the seedlings, the operator is on the work seat 46 of the traveling vehicle body 40, and it is difficult to operate the control panel 47a of the control handle 47.

  Therefore, on the traveling vehicle body 40, the vehicle body manipulating portion 126 for the worker who is on the work seat 46 is provided.

  As shown in FIG. 4, FIG. 7, and FIG. 9, a rear step 127 that slopes upward to the rear of the machine is provided in the lower part of the seedling feeding device 43, and either one side of the rear step 127, the right side of the machine in this case. An on-vehicle control section 126 is provided at the end (on the left side with respect to the worker seated on the work seat 46).

  The vehicle body maneuvering section 126 has a second vehicle height adjusting lever 128 for adjusting the vehicle height of the traveling vehicle body 40 to adjust the planting depth of the planting hoppers 20a, 20b at the outermost side of the body. The second main clutch lever 129 is arranged inside the vehicle body with respect to the second vehicle height adjusting lever 128.

  Since it is basically not necessary to fix the vehicle height at the time of planting seedlings, the second vehicle height adjusting lever 128 has only the “high” position and the “low” position.

  At the outer end of the rear step 127, a second vehicle height adjusting lever 128 is housed in a frame, and a vehicle height adjusting lever guide 130 having a display scale indicating the vehicle height is tilted upward toward the front of the machine body. A main clutch lever guide 131 for accommodating a second main clutch lever 129 in a frame is provided inside the body of the vehicle height adjusting lever guide 130 in an upward inclined posture toward the front side of the body.

  It should be noted that the second vehicle height adjusting lever 128 has a larger protrusion amount to the front side of the vehicle body than the second main clutch lever 129.

  Further, the second vehicle height adjusting lever 128 and the second main clutch lever 129 are rotatable on the base side with respect to the attachment support plate 105 on one side of the body (right side of the body) and the front and rear beam frames 106f and 106r. If it is mounted, it is not necessary to separately provide a mounting member, and the number of parts can be reduced.

  Further, side clutch pedals 132L and 132R for opening and closing the left and right side clutches are provided on the upper surface of the rear step 127 exposed on the other side of the body than the on-vehicle control section 126, that is, on the left side of the body.

  The vehicle height adjusting lever guide 130 and the main clutch lever guide 131 are arranged with a certain vertical interval S between the upper surface of the side step 118 and the upper surface. The above-mentioned vertical interval S is such that a space can be secured even if the operator's foot is inserted (for example, about 15 to 20 cm).

  With the above configuration, an operator who is on the floor step 122 and on the work seat 46 can manually operate the planting depth and turn on and off the planting work without getting off the traveling vehicle body 40. In addition to improving work efficiency, planting accuracy of seedlings is improved.

  Further, by arranging the second main clutch lever 129 inside the machine body that is closer to the work seat 46 than the second vehicle height adjusting lever 128, the second main clutch lever 129 is used for supplementing seedlings, correcting the planting state, taking a break, etc. The operator can easily reach the main clutch lever 129, and the labor can be reduced.

  In particular, when a problem occurs, seedling planting work can be interrupted promptly, replanting work of seedlings becomes unnecessary, and the number of seedlings that are not suitable for growth and are discarded is reduced.

  Further, since the second vehicle height adjusting lever 128 is projected to the front side of the machine body with respect to the second main clutch lever 129, the arm is greatly extended when operating the second vehicle height adjusting lever 128 far from the work seat 46. There is no need, and the labor of the operator is reduced.

  By providing the left and right side clutch pedals 132L and 132R in the rear step 127, which of the side clutch pedals 132L and 132R is to be used when the traveling direction of the traveling vehicle body 40 is about to deviate from the straight traveling direction based on the ridges. By operating the or to temporarily disengage the corresponding side clutch, the course of the traveling vehicle body 40 can be corrected, and the planting position of the seedlings can be prevented from meandering in the left-right direction.

  In addition, since the vertical gap S is formed between the vehicle height adjusting lever guide 130 and the main clutch lever guide 131, that is, the upper and lower sides of the vehicle body maneuvering section 126 and the side step 118, the work for riding on the work seat 46 is performed. The movement of the person's foot is not hindered, and the worker can get on the control seat 46 in a comfortable posture, and the labor is reduced.

  Preliminary seedling frames 50 capable of accommodating seedlings to be supplied to the seedling feeding device 43 are provided above the rear wheel axles 12 of the rear wheels 44 on the left and right sides of the work seat 46 in a side view of the aircraft.

  The auxiliary seedling frame 50 is provided with a support stay 52 on an upper part of a seedling mounting column 51 projecting to the outside of the body of the traveling vehicle body 40, and the support stay 52 is capable of switching between a rotating state and a non-rotating state. An arm 53 is provided, and seedling frame frames 54, 54 in the vertical direction are arranged at intervals on the seedling mounting rotation arm 53, and supplementary seedlings are housed on the same surface of the seedling frame frames 54, 54. It is configured by mounting one side end of a mounting table 55 on which a container such as a seedling box or a seedling tray is mounted.

  Although only one mounting table 55 may be provided in the vertical direction, a plurality of mounting tables 55 may be arranged at intervals in the vertical direction that do not hinder the taking out of the container.

  The preliminary seedling frame 50 having the above configuration is provided on each of the left and right sides of the traveling vehicle body 40, and the seedling mounting rotation arm 53 is rotated on the support stay 52 according to the situation.

  For example, at the time of planting seedlings, by pointing the longitudinal direction of the mounting table 55 in the machine front-back direction, it is easy to take out the seedling container from the mounting table 55 or return the empty container to improve work efficiency. Can be improved.

  Further, since the mounting tables 55 are located on the left and right sides of the traveling vehicle body 40 at this position, it becomes easier for the operator to grasp the end portion of the portion where the traveling vehicle body 40 is mountable, and the feet stick out from the traveling vehicle body 40 and the posture Is prevented from breaking down.

  Further, when the worker gets on and off the traveling vehicle body 40, the seedling mounting rotation arm 53 is rotated by about 90 degrees.

  As a result, a space for getting on and off is formed on both left and right sides of the traveling vehicle body 40.

  The operator can also get in and out from the front side of the machine body of the traveling vehicle body 40, but the seedling frame 54, 54 is located at the front side of the machine body by rotating the seedling mounting rotation arm 53, and the mounting table 55 is at the rear side of the machine body. In the state of being located on the side, the operator can use the seedling frame frames 54, 54 as a handrail, so that the traveling vehicle body 40 can be smoothly loaded and unloaded.

  Further, when loading or unloading the seedling containers on the mounting table 55, there is no member that hinders the loading and unloading of the containers from the rear side of the machine body, so that the work efficiency is improved.

  The work seat 46 is attached to the traveling vehicle body 40 in a U-shape in a front view or a rear view, and a portion of a seat frame 49 straddling a body cover 48 that covers an upper portion of the engine 41 or the like in a lateral direction of the body. Install on top of. On the upper part of the seat frame 49, the bases of the left and right seat stays 49a facing the front of the machine are mounted, and the working seat 46 is centered on the left and right rotation fulcrums on the bases of the left and right seat stays 49a. It is mounted so as to be rotatable in the front-back direction.

  As a result, the work seat 46 can be placed in a posture in which it comes into contact with the vicinity of the front end of the body of the seedling feeding device 43, so that it is possible to prevent sand or rainwater from adhering to the seated portion of the worker when the work is interrupted.

  However, since the work seat 46 is rotatable, the work seat 46 is rotated when passing through a large unevenness, which makes the riding comfort uncomfortable and disturbs the riding posture of the worker to the seedling feeding device 43. There is a problem of disturbing the timing of seedling supply.

  In particular, in a configuration including a seating sensor 140 that detects whether or not an operator is seated on the work seat 46, and performing some control when the seating sensor 140 does not detect seating, erroneous detection may cause a work error. There is a problem that interruption or deterioration of work accuracy occurs.

  In order to prevent this problem, the seat suspension mechanism 134 shown in FIG. 24 is arranged in the lower front portion of the work seat 46 in such a posture that it comes into contact with the left and right seat stays 49a.

  The seat suspension mechanism 134 includes an upper plate 135 directly attached to a lower portion of the work seat 46, a lower plate 136 having a concave shape in a side view, and left and right suspension springs 137 for urging the lower plate 136 downward. An insulator 138 is provided outside the left and right suspension springs 137, and comes into contact with the recess of the lower plate 136 when a worker sits down and a load is applied. The insulator 138 is formed by forming an elastic member such as rubber into a tubular shape and is capable of absorbing vibration.

  Then, as shown in FIG. 25, the magnet sheets 139 are attached to the lower surface of the lower plate 136 and the portions in contact with the left and right seat stays 49a, respectively.

  With the above-described configuration, the vibration generated by the traveling of the traveling vehicle body 40 or work can be absorbed by the seat suspension mechanism 134, so that the operator is less likely to be tired due to the vibration.

  Further, when the work seat 46 is rotated to the use position, the magnetic sheets 139 stick to the left and right seat stays 49a by magnetic force, respectively, so that the work seat 46 moves to the front side of the machine even when the machine shakes due to the unevenness of the field. Since it can be prevented from rotating, the sitting posture of the worker is unlikely to change, labor is reduced, and planting accuracy of seedlings is improved.

  Instead of the magnet sheet 139 described above, a plate-like surface fastener is attached to each of the lower plate 136 and the left and right seat stays 49a with an adhesive or the like, and rotation is restricted by contact between the surface fasteners. Good.

  When the seating sensor 140 is mounted on the work seat 46, if the seating sensor 140 is mounted on the left and right seat stays 49a, the seating sensor 140 is arranged at a fixed portion. Since the harness for transmitting the signal can be arranged without considering the rotation, the structure can be simplified.

  Further, since the harness is not pulled and broken during rotation, the seating sensor 140 does not become undetectable, and control using the seating sensor 140 can be utilized.

  The seating sensor 140 is composed of a vertical movement type seating switch 141 which detects the seating by rotating the work seat 46 to a work position and being pushed down by a load caused by the appearance of the worker. It is made of an elastic material such as rubber to prevent deformation even when a load is applied.

  With the above configuration, since the seating switch 141 is configured to move in the vertical direction, it is difficult for soil to collect in the movable range of the seating switch 141, and the detection accuracy of the seating sensor 140 is prevented from being lowered.

  As shown in FIGS. 26A and 26B, the seating switch 141 is provided on a switch holder 142 provided on at least one of the left and right sides of the seat stay 49a so as to be vertically movable, and the working seat 46 is rotated to a non-working position. When members are stacked on the seat stay 49a in this state, the upper surface of the seat stay 49a may be flat.

  As a result, a seedling box, a fuel tank, and the like can be temporarily placed on the upper surfaces of the left and right seat stays 49a, so that work efficiency is improved.

  Further, the left and right lower end portions of the seat frame 49 are frames of a slide portion that moves the left and right traveling transmission cases 38, 38 in the left and right direction to change the left and right distance between the left and right rear wheels 44, 44. Omitted).

  As a result, the seat frame 49 also serves as a constituent member of the slide portion, so that the strength of the slide portion can be improved.

  When transplanting seedlings into a field, so-called irrigation work may be performed in which water is supplied near the planted seedling in consideration of the soil quality of the field, the surrounding water environment, and the conditions such as the weather before the work.

  In the transplanter of the present case, as shown in FIG. 4, at least one of the seedling mounting columns 51 provided on both the left and right sides of the traveling vehicle body 40 has a lateral protruding portion 51a protruding from the lower portion of the floor step 122 to the outside of the body. At the same time, the outer side end of the lateral protrusion 51a is bent upward in the vicinity of the outer end of the body of the traveling transmission case 38 to have an upper and lower portion 51b, and the side protrusion 51a and the upper and lower portion 51b are provided. Further, a water tank holder 601 having a rectangular frame shape in a plan view is provided.

  As shown in FIG. 1, the water tank holder 601 is arranged such that the long side faces in the machine front-rear direction, and is located on the outer side of the machine and at a position rearward of the center of the machine front-rear direction. The first joint 602 in the left-right direction connected to 51b is provided, and the first joint 602 in the up-down direction connected to the lateral protruding portion 51a of the seedling mounting column 51 is provided at the inner side of the body and at a position rearward of the center in the front-rear direction of the body. Two joints 603 are provided.

  Since the mounting position of the water tank holder 601 is on the rear side of the central part in the longitudinal direction of the machine body, the rear part of the machine body of the water tank 600 to be loaded is separated from the rear wheel 44 to the front side of the machine body. The tank 600 is prevented from coming into contact with the rear wheel 44 and obstructing the vehicle height adjustment.

  Further, since the rear part of the water tank 600 is located above the front side of the machine body, that is, near the rotation fulcrum, in which the vertical position of the traveling power transmission case 38 does not easily change during vertical rotation, the water tank 600 is placed in the traveling power transmission case 38. Interference is prevented and interference with vehicle height adjustment is prevented.

  Then, the water tank holder 601 is connected to the lateral projecting portion 51a and the upper and lower portions 51b of the seedling mounting support column 51 via the first joint 602 and the second joint 603, respectively, so that the seedling mounting support column 51 is attached to the water tank holder 601. Since it can be used as a mounting member, the number of parts can be reduced.

  In addition, since the lateral protruding portion 51a of the seedling mounting column 51 is used as the bottom receiving portion of the water tank 600, it is not necessary to separately prepare a bottom supporting member capable of withstanding the water tank 600 full of water, and the number of parts can be reduced. More planned.

  Note that both the left and right seedling mounting columns 51 may have the same shape, and the water tank stays 601 may be provided on both of them.

  The irrigation water stored in the water tank 600 is pumped up by the operation of the irrigation pump 700 provided at the bottom of the traveling vehicle body 40 and near the front-rear center of the machine body, and the hoppers 20a and 20b for planting plant the seedlings. Is discharged to. The irrigation pumps 700 are arranged according to the number of the planting hoppers 20a and 20b, and are arranged on the left and right sides with a distance from the center of the traveling vehicle body 40 as a reference.

  A water hose may be attached to the irrigation pump 700 and water may be discharged from the water tank 600 through the irrigation pump 700 to the water spray nozzle 710. However, the operation of a piston cylinder (not shown) of the irrigation pump 700 may be performed. A part of the water sent out in the discharge direction may be returned to the water tank 600 side. As a result, the amount of irrigation water supplied to the field at one time is reduced, the growth of seedlings may be delayed due to lack of water, and the quality of the harvest may be deteriorated due to poor growth.

  In order to prevent this, check valves 720 for restricting the water supply direction to one side are provided at the lower parts of the left and right side steps 118 outside the machine, and the water tank 600 and the water supply side of the check valve 720 are connected by a water absorption hose 721. At the same time, the drain side of the check valve 720 and the drain nozzle 710 are connected by the drain hose 722. Further, the check valve 720 and the irrigation pump 700 are connected by a relay hose 723.

  More specifically, as shown in FIG. 27, first, the water absorption check valve 724 and the drainage check valve 725, which are oriented in a direction in which water is allowed to flow from the front side to the rear side of the machine body, are vertically arranged, and the outer side end of the side step 118 of the machine body is arranged. Attach to the bottom of the section. Then, one side of the water absorption hose 721 is inserted into the water tank 600, the other side is connected to the inlet of the water absorption check valve 724, that is, the front side of the machine body, and one side of the drain hose 722 is connected to the outlet of the drain check valve 725. That is, it is connected to the rear side of the machine body and the other side is connected to the drain nozzle 710.

  The irrigation pump 700 is equipped with a base portion side of a first relay hose 723a in the left-right direction of the machine body, and a converging port of a three-pronged branch joint 723d on the end portion side. A second relay hose 723b is provided between the water absorption port of the branch joint 723d and the outlet (rear side of the machine) of the water absorption check valve 724, and the drain port of the branch joint 723d and the inlet of the drain check valve 725 (front side of the machine body). 3), a third relay hose 723c is provided.

  Although the drainage nozzle 710 may directly supply water to the field, irrigation water is injected into the inside from the upper openings of the planting hoppers 20a, 20b with a certain amount of water force and adheres to the inside of the planting hoppers 20a, 20b. It may be configured to be used for removing the accumulated mud.

  This eliminates the need for a scraper that removes mud that enters the inside of the planted hoppers 20a and 20b while it is open, thus reducing the number of parts.

  If the scraper draws a predetermined locus in association with the elevation of the planted hoppers 20a and 20b, the number of parts of the mechanism that moves up and down along the predetermined locus can be reduced, so that the number of parts can be greatly reduced and the machine body configuration can be reduced. Can be simplified.

  Further, since the mud can be returned to the field by irrigation, it is possible to prevent the outside of the field from being contaminated with the mud and reduce the outflow of nutrients in the field.

  With the above configuration, since the check valve 720 is arranged in the space portion on the left and right outer sides of the machine body, when a problem such as clogging occurs, it is easy to investigate the cause and perform maintenance work, and reduce labor and work time. .

  Further, since the water absorption check valve 724 and the drainage check valve 725 are arranged so that the water supply directions are the same, it is difficult to make a mistake in the mounting direction during the assembly work after disassembly, and the work efficiency is improved.

  Further, the check valve 720 is arranged on the rear side of the water tank 600, on the front side of the planting hoppers 20a, 20b, and on the outside of the body of the irrigation pump 700, so that the water absorption hose 721, the drain hose 722, and the first relay hose. It is possible to minimize the bending of the 723a, the second relay hose 723b, and the third relay hose 723c, and to arrange them so that they do not easily overlap.

  It should be noted that if the water absorption check valve 724 and the drainage check valve 725 are made of transparent cylinders so that the internal spring and the ball for preventing backflow can be confirmed from the outside, the water supply direction can be visually recognized and the mounting error is less likely to occur.

  INDUSTRIAL APPLICABILITY The transplanter according to the present invention can be applied to increase the strength of a traveling vehicle body of the transplanter for planting seedlings, increase the degree of freedom in design, and has high industrial applicability.

20a Planting hopper (planting device)
20b Planting hopper (planting device)
26 transmission case 38 traveling transmission case 39 mission case 40 traveling vehicle body 41 engine 43 seedling supply device 44 rear wheel (traveling device)
47 Steering handle 101 Axle cover 103 Main frame 104 Handle frame 105 Mounting support plate (support member)
106f Front beam frame (support member)
106r Rear beam frame (support member)
107 Supply Support Frame 108 Bumper Support Frame 109 Bumper 113 Front Boarding Step 126 Body Control Section

Claims (6)

Left and right traveling devices (44) for traveling in the field on the traveling vehicle body (40), a seedling supply device (43) for supplying seedlings, and a planting device for receiving seedlings from the seedling supply device (43) and planting them in the field ( In a transplanter equipped with 20a, 20b),
The main frames (103) of the traveling vehicle body (40) are provided on both left and right sides of the machine body, and the left-right distance between the left and right rear ends of the main frame (103) is wider than the left-right distance between the front ends and the seedling feeding device. (43) A transplanter characterized by being fitted within the left-right width. A transmission case (38) for transmitting power to the traveling device (44) is rotatably provided on each of the left and right sides of the traveling vehicle body (40), and a steering handle (47) for maneuvering an airframe is provided at a rear portion of the traveling vehicle body (40). ),
The front sides of the left and right main frames (103) are attached to axle covers (101) connected to the traveling transmission case (38), respectively, and the rear sides of the bodies are handle frames (104) that support the steering handle (47). 2. The transplanter according to claim 1, wherein the transplanter is connected to both the left and right sides of FIG.   The left and right main frames (103) are bent toward the outside and above the fuselage between the front and rear of the rear side of the traveling device (44) and the front side of the planting devices (20a, 20b), respectively. The transplanter according to claim 1 or 2, wherein the seedling supply device (43) is configured to be bent toward a rear side of the machine body at a lower portion thereof. A transmission case (26) for transmitting a driving force is provided to the seedling supply device (43) and the planting device (20a, 20b), and a supply support for supporting the seedling supply device (43) on the transmission case (26). With a frame (107)
A support member for mounting a steering member of the vehicle body steering unit (126) through the supply support frame (107) is provided with a vehicle body steering unit (126) for an operator who rides on the traveling vehicle body (40) to control the airframe. 105, 106f, 106r) are provided, The transplanter of any one of Claim 1 to 3 characterized by the above-mentioned.   A front boarding step (113) is provided on the front side of the traveling vehicle body (40) for an operator to get in and out of the machine body, and a bumper (109) is provided between the left and right sides of the front boarding step (113). 5. The transplanter according to any one of claims 1 to 4, characterized in that the front end of (1) is arranged on the front side of the machine body with respect to the front end of the front boarding step (113). An engine (41) for generating a driving force on the traveling vehicle body (40) and a mission case (39) for branching and transmitting the driving force of the engine (41) are provided.
Bumper support frames (108) for supporting the bumpers (109) are provided on both left and right sides of the mission case (39), and the left and right bumper support frames (108) are arranged so as not to contact the engine (41). The transplanter according to claim 5, characterized in that: