JP6512077B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter.

  Conventionally, the lower part of the seedling planting part is equipped with a float that grounds to ground in a weir scene, and the elevating cylinder is extended / contracted via the hydraulic valve according to the vertical rotation of the float detected by the float inclination angle sensor There is a seedling transplanting machine that moves the planting section up and down according to the change in the depth of the field (see, for example, Patent Document 1).

JP, 2015-84673, A

  However, for example, when the float inclination angle sensor is provided on the float, a control unit is required to control the operation of the hydraulic valve, such as a mounting portion of the sensor, a component such as a harness for transmitting the detection result of the sensor to the control unit. And the number of parts increases. In addition, in order to properly adjust the amount of vertical rotation of the float and the amount of elevation of the seedling planting part, it is necessary to precisely control the operation of the hydraulic valve, and it is necessary to make the control device and hydraulic valve highly accurate. There is.

  The present invention has been made in view of the above, and has an object of providing a seedling transplanting machine capable of raising and lowering a seedling planting part according to the amount of vertical rotation of a float while having a simple configuration. Do.

In the invention according to claim 1, the seedling planting unit (4) is provided on the traveling vehicle body (2) so as to be able to move up and down, and the float (62) to rotate the weir scene in the seedling planting unit (4) Provided with a lift arm (64) that rotates in conjunction with the rotation of the float (62), and a lift switching device (130) that lifts and lowers the seedling planting section (4); ) And the lift switching device (130) via a lift switching cable (270), and a cable receiving member (275) for receiving the lift switching cable (270) above the lift arm (64) is provided. An engine (30) for transmitting power to the transmission case (13) through the step-change gear (14) is mounted on the main frame (15) of the traveling vehicle body (2), and the float (62) is the seedling plant Take a posture not to raise and lower the attached part (4) A part of the lift switching cable (270) positioned between the lift arm (64) and the cable receiving member (275) is in a vertical posture, and the engine (30) is a predetermined member of the main frame (15) The output of the engine (30) is mounted on a rectangular frame-shaped engine base (150) mounted at a position, and the output of the engine (30) is transmitted via the transmission belt (14b) whose tension is adjusted by a tension pulley (351) The proximal end of the support arm (352), which is transmitted to the transmission (14) and supports the tension pulley (351), is pivoted via a spring to a bracket (353) fixed to the engine base (150) in seedling transplanter which are rotatably connected, wherein the engine (30) is an air-cooled engine air inlet (311) is formed d An air cleaner (320) provided at an upper portion of the engine main body (310) and having an air cleaner intake port (313) facing the same direction as the engine intake port (311); A flange portion (345) provided between an intake port (313) and an exhaust hole (312) located below the air cleaner intake port (313), the engine body (310) and the air cleaner (320) An air cleaner cover (330) attached to the front and an air hole (355) for exhausting hot air in the upper part of the air cleaner cover (330) are formed, and a frame shape surrounding the upper part of the air cleaner cover (330) A sealing sponge (346) is disposed on the back side, and the engine (30) together with the air cleaner cover (330) An engine cover covering the upper (350) and a seedling transplantation machine, characterized in Rukoto equipped with.

In the invention according to claim 2 , the lifting and lowering switching device (130) includes a spool (131) for switching the expansion and contraction of a lifting and lowering cylinder (25) for lifting and lowering the seedling planting section (4). 2) includes a valve side mounting plate (210) to which the elevation switching device (130) is attached, and the valve side mounting plate (210) receives the other end side portion of the elevation switching cable (270) The positions of the valve-side cable receiving member (276) and the valve-side cable receiving member (276) are changed, and the elevation switching cable (270) is the elevation switching device (130) by the vertical rotation of the float (62). And the proximal end portion is rotatably connected to the valve side mounting plate (210), and the middle portion is the spool (see FIG. 31) and an interlock arm (121) connected to the other end of the lift switching cable (270), one end of which is connected to the float (62), and the valve side cable receiving member ( 276) is exposed above the valve side mounting plate (210), and the sensitivity adjusting lever (280) is disposed on the upper side of the valve side mounting plate (210). The work vehicle described in 1.

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According to the invention of claim 1, when the float (62) does not operate the elevation switching device (130), part of the elevation switching cable (270) is between the elevation arm (64) and the cable receiving member (275). By being in the vertical posture, it is possible to prevent the load other than in the vertical direction from being applied to the lift arm (64), so that the lift switching operation of the seedling planting section (4) by the lift switching device (130) is prevented Be done. In addition, the support arm (352) and the spring become one rigid body, the vibration of the support arm (352) is stabilized, the durability is improved, and the tension pulley (351) and other peripheral parts are also protected. . Further, a sealed space may be formed between the upper portion of the air cleaner cover (330) and the air hole (355) to reliably discharge the hot air at the upper portion of the air cleaner cover (330) from the air hole (355) to the outside. As well as being possible, even if the opening and closing amount of the engine cover (350) is increased, there is no risk that the sealing sponge (346) will lose its shape or the like.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, it is possible to visually recognize the amount of movement of the elevation switching cable (270) when the sensitivity adjustment lever (280) is operated, and the elevation switching cable (270) Can finely adjust the position at which the lifting and lowering switching device (130) is operated, so that the working height of the seedling planting unit (4) can be optimized and the planting accuracy of the seedling can be further improved. It can .

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FIG. 1 is a side view of a seedling transplanting machine according to the present embodiment. FIG. 2 is a plan view of the seedling transplanting machine according to the present embodiment. FIG. 3 is an explanatory view showing a lift control mechanism of a seedling planting part of the seedling transplanting machine according to the present embodiment. FIG. 4 is an explanatory view of the float side switching unit. FIG. 5 is an explanatory view showing a connection state of the lift switching cable and the lift arm. FIG. 6 is an explanatory view showing a valve side switching unit. FIG. 7A is an explanatory view showing the lowest position of the float. FIG. 7B is an explanatory view showing the float ascending state. FIG. 8 is an explanatory view showing the disposition state of the battery in a side view. FIG. 9 is an explanatory view showing the arrangement of the battery in a plan view. FIG. 10A is an explanatory view in plan view of the engine base. FIG. 10B is a side view of the engine base. FIG. 11A is an explanatory view showing an example of the cover structure of the engine. FIG. 11B is an explanatory view showing an example of the cover structure of the engine.

Hereinafter, a seedling transplanting machine according to an embodiment of the present invention will be described in detail with reference to the drawings. In the embodiment, when defining the front, rear, left, and right directions, the traveling direction of the traveling vehicle is viewed from the control seat as a reference. Further, the present invention is not limited by the embodiments.
Various modifications can be made without departing from the scope of the present invention. Furthermore, constituent elements in the following embodiments include those that can be easily replaced by persons skilled in the art or those that are substantially the same, that is, the so-called equivalent ranges.

  The seedling transplanting machine according to the present embodiment is a riding type provided with a seedling planting unit 4 at the rear of the traveling vehicle body 2. FIG. 1 is a side view of a seedling transplanting machine according to an embodiment, and FIG. 2 is a plan view of a traveling vehicle body. Although the seedling transplanting machine which concerns on embodiment is a structure of eight row planting, it does not matter as a seedling transplanting machine of the number of planting streaks different from this composition. Moreover, when referring to the whole seedling transplanting machine, it may be described as an aircraft.

  As shown in FIG. 1 and FIG. 2, the seedling transplanting machine according to the present embodiment mounts the seedling planting unit 4 for raising and lowering seedlings in the field via the lift link mechanism 3 at the rear of the traveling vehicle body 2 There is. Then, the main body portion of the fertilizer application device 5 is disposed on the rear upper side of the traveling vehicle body 2.

  The traveling vehicle body 2 is a four-wheel drive vehicle provided with left and right front wheels 10 and 10 and rear wheels 11 and 11 which are drive wheels. A transmission case 13 for transmitting the driving force to the seedling planting part 4 etc. and a hydraulic pressure for outputting the driving force supplied from the engine 30 to the transmission case 13 on the front side of the main frame 15 constituting the vehicle body frame of the traveling vehicle body 2 And a continuously variable transmission 14 of the formula. The continuously variable transmission 14 is a hydrostatic continuously variable transmission called a so-called HST (Hydro Static Transmission).

A front wheel final case 10 a is provided on the left and right sides of the transmission case 13. Then, from the front wheel support portion capable of changing the steering direction of the left and right front wheel final case 10a,
The front wheels 10 are attached to left and right front axles 10b which respectively project outward. In addition, rear wheel gear cases 11a are attached to the rear side of the main frame 15 and to the left and right sides of the rear frame 22 (see FIG. 2) provided in the lateral direction of the vehicle body. And from the rear wheel gear case 11a The rear wheels 11 are attached to left and right rear axles 11b which respectively project outward.

  At the upper part of the rear frame 22, left and right link support frames 23, 23 for supporting the lifting link mechanism 3 are provided to project upward. A pair of left and right lower link arms 24, 24 are provided on the lower side of the left and right link support frames 23, 23, and between the left and right, and hydraulically operated between the left and right lower link arms 24, 24. A lifting cylinder 25 is provided. Then, by providing the upper link arm 26 above the lift cylinder 25, the lift link mechanism 3 which is a parallel link mechanism is configured. The other lower end of the lower link arms 24 and 24, the lifting cylinder 25 and the upper link arm 26 each having one end connected to the traveling vehicle body 2 is attached to the front of the seedling planting section 4.

  Further, as illustrated, the engine 30 is mounted on the main frame 15. The rotational power of the engine 30 is transmitted to the transmission case 13 via the belt transmission 21 and the continuously variable transmission (HST) 14. The rotational power transmitted to the transmission case 13 is shifted by the transmission in the transmission case 13, and then separated into the traveling power and the externally extracted power and taken out.

  The externally-extracted motive power taken out separately from the rotational motive power transmitted to the transmission case 13 is transmitted to a planting clutch 27 provided at the rear of the traveling vehicle body 2. Then, the planting clutch 27 transmits the power to the seedling planting portion 4 by the planting transmission shaft 28.

  On the other hand, right and left drive shafts 42 and 42 are provided at the rear of the transmission case 13. The rotational power from the engine 30 is transmitted to the left and right rear wheel gear cases 11 a and 11 a through the transmission case 13 and the drive shaft 42.

  Although not shown, a side clutch mechanism is provided on the transmission direction upper side with respect to the left and right drive shafts 42, 42 for transmitting and receiving the transmission to the left and right drive shafts 42, 42. As shown in FIG. 1, side clutch pedals 43a and 43a for turning on and off the left and right side clutch mechanisms are provided on the lower front side of steering seat 41 and on one side.

  Of the left and right side clutch pedals 43a, 43a, if the side clutch mechanism 43a on the inner side of the turn is depressed to turn off the side clutch mechanism and then the steering wheel 35 is operated for turning, the drive rotation of the rear wheel 11 inside the turn is It can be completely shut off. Therefore, the turning radius can be made smaller than turning by the operation of the handle 35 alone, and the work start position of the work bar suitable for the field can be appropriately selected, and the work accuracy is improved.

  In this manner, the transmission to the inner rear wheel 11 can be stopped at the time of turning, and the turning radius can be reduced, and the working position before turning and the working position after turning can be prevented from being separated. This eliminates the need to re-adjust the work start position, thus improving work efficiency and work accuracy. In the present embodiment, when the steering wheel 35 is turned to turn the traveling vehicle body 2 to turn, the side clutch mechanism located inside the turn is turned off to stop the transmission to the rear wheel 11 inside the turn. It is possible to

  At the upper front of the traveling vehicle body 2, a bonnet 39 provided with a control panel 38 at the upper portion for operating each part is provided. The control panel 38 is provided with a control switch 48 and a setting dial 49 for performing predetermined operation control via the controller 100 (see FIG. 3) which is a control unit.

  In addition, the bonnet 39 includes a steering wheel 35 for steering the machine body, a shift control lever 36 for operating the continuously variable transmission 14 and the seedling planting unit 4, and an auxiliary shift switching device (not shown) for switching the traveling transmission of the traveling vehicle 2. An auxiliary shift control lever 37 or the like to be operated is provided. In the present embodiment, as the planting unit operating means, the gearshift operation lever 36 includes a lifting and lowering operation tool for operating the lifting and lowering cylinder 25 and a working tool for switching the seedling planting unit 4 between the working state and the non-working state. It works (see Figure 3).

  In addition, a front cover 40 which can be opened and closed is provided on the front side of the bonnet 39, and inside the front cover 40, the fuel tank, battery, and steering wheel 35 steer the left and right front wheels 10, 10 and left and right front wheel final cases 10a, An interlocking mechanism (not shown) for rotating the lower side of 10a is provided.

  An engine cover 30a that covers the upper part and the side part of the engine 30 is provided at a position rearward of the bonnet 39 and above the engine 30, and a control seat 41 on which an operator is seated above the engine cover 30a. Is provided.

  Furthermore, the fertilization device 5 is mounted on the rear side of the main frame 15 on the rear side of the steering seat 41. The driving force of the fertilization device 5 is transmitted by a fertilization transmission mechanism (not shown) provided so as to face the fertilization device 5 from the left and right one side of the left and right rear wheel gear cases 11a.

  A substantially horizontal floor step 33 is formed on the left and right sides of the lower part of the engine cover 30a and the bonnet 39. As shown in FIG. 2, the floor step 33 is partially in the form of a lattice, and the mud attached to the shoes of the worker who walks on the floor step 33 falls into the field. Moreover, as shown in FIG. 2, the seedling transplanting machine which concerns on this embodiment arrange | positions the left and right extension steps 34, 34 on the left and right sides of the floor step 33, respectively.

  Further, a rear step 330 (see FIG. 2) is connected behind the floor step 33, and an extension rear step 340 is extended behind the extension step 34. The surfaces of the rear step 330 and the extension step 34 are preferably subjected to anti-slip processing in which a plurality of projection patterns are formed, for example, so that the foot is not slippery when working.

  In addition, as shown in the figure, on the front side of the traveling vehicle body 2 and on both the left and right sides, spare seedling frames 50 are provided to arrange a plurality of spare seedling placing stands 52 on the seedling frame support column 51 at intervals in the vertical direction. Working materials such as seedlings and fertilizer bags to be replenished to the planting unit 4 can be placed.

  In addition, a seedling tank 53 for loading the seedlings to be planted in the field is attached to a rear end portion of the lifting link mechanism 3 together with a sliding mechanism (not shown) sliding in the lateral direction. The seedling tank 53 has a long seedling partition fence 54 arranged in the vertical direction at predetermined intervals in the left-right direction, and a seedling planting device for scraping the loaded seedlings under the seedling tank 53 and planting it in the field 55 are arranged.

  The seedling planting device 55 is the same number as the number of planting operation bars divided by the seedling partition fence 54, that is, eight in the present application, and the planting transmission case 56 is spaced below the seedling tank 53. Four planting rotarys 57, 57 are provided, each of which is arranged in four rows and rotated to both the left and right sides of the planting transmission case 56 to take seedlings and plant them in the field.

  Moreover, the fertilization apparatus 5 divides the fertilization hopper 70 which stores a fertilizer into the same number as the number of operation bars of the seedling planting part 4 (eight lines in this embodiment). In addition, since the fertilization hopper 70 for eight lines is long in the left-right direction and the convenience of the injection | pouring of a fertilizer and attachment or detachment falls, it is good also as a structure which put two inside which divided the inside into four lines.

  At the lower part of the fertilization hopper 70, a feeding device 71 for feeding a set amount of fertilizer is provided for each row, and a ventilation duct 72 through which a conveying wind for moving the fertilizer passes below the feeding device 71 in the lateral direction of the machine Provided. And the fertilization hose 73 which guides a fertilizer in the vicinity of the seedling planting position of the seedling planting part 4 in the downward position of each delivery apparatus 71 is provided. Further, a blower 74 is provided at one end of the ventilation duct 72 on the side of the machine body, which is operated by the blower electric motor 76 to generate a carrier air.

  In addition, as shown in FIGS. 1 and 2, below the seedling planting unit 4, a center float 62C that slides on the heel scene and two side floats 62L and 62R turn around the shaft. It is freely provided. The center float 62C and the left and right side floats 62L and 62R may be collectively referred to as the float 62 in some cases.

  Further, on the lower side of the seedling planting unit 4 and on the front side of the float 62 with respect to the float 62, there is provided a ground leveling rotor 63 (FIG. 1) for leveling the unevenness of the straw scene. The driving force of the leveling rotor 63 can be obtained from the rear wheel gear case 11a on the other side via the rotor transmission shaft 63a.

  Furthermore, as shown in FIG. 1, on the left and right sides of the seedling planting part 4, either the left or the right is in contact with the dredging scene, and a wire drawing marker is formed to serve as a guide for traveling on the next work strip. 16, 16 are provided respectively. When left and right sides of the left and right draw markers 16, 16 are separated, the left and right sides are separated upward, and when raising the seedling planting part 4 at the time of turning, both left and right are separated at the same time. When the part 4 descends, the left and right sides are separated upward, and the left and right other sides are grounded.

  Further, as shown in FIG. 1 and FIG. 2, a center mascot 66 which is long in the vertical direction is provided in the left and right center of the traveling vehicle body 2 and in front of the bonnet 39. By aligning the center mascot 66 with the grooves formed by the left and right draw markers 16, 16 on the field, it becomes possible to run according to the work position of the last work bar, improving work accuracy and generating non-work position Prevention of

  In addition, depending on the soil quality of the field, the guide lines formed by the left and right draw markers 16, 16 may be buried immediately, and the straight line may disappear. At this time, it is preferable to use the left and right side markers 19 provided on the front side of the machine than the left and right draw markers 16, 16. That is, by moving the left and right side markers 19 in the outward direction of the machine and positioning the side markers 19 above the planted seedlings, it becomes possible to perform the planting work in accordance with the planting of the seedlings of the previous work bar. .

  In the above configuration, the characteristic configuration of the seedling transplanting machine according to the present embodiment will be described with reference to FIGS. 3, 4 and 5. FIG. 3 is an explanatory view showing a lift control mechanism of the seedling planting unit 4 of the seedling transplanting machine according to the present embodiment.

  The seedling transplanting machine according to the present embodiment, as shown in FIG. 3, is provided with a shift operating lever 36 as planting part operating means, and a planting part automatic lifting mechanism 300 that performs automatic lifting control of the seedling planting part 4 . The gear shift control lever 36 continuously moves up and down the seedling planting unit 4 by moving up and down operation switches 361 which are raising and lowering operation tools for causing the seedling planting unit 4 to move up and down, work on / off switch 362 which is a work on / off tool A continuous lowering operation switch 363 which is a continuous lowering operation tool to lower is provided.

  The switches 361, 362 and 363 provided on the gear shift control lever 36 are connected to a controller 100 as a control unit for controlling the raising and lowering operation and the work operation of the seedling planting unit 4. The controller 100 includes, for example, a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM), and controls each part of the seedling transplanting machine by executing a program stored in the ROM. .

  The controller 100 further includes an electric motor 110 as a drive source for moving the spool 131 of the switching valve 130, which is an elevation switching device, forward and backward, a link rotation sensor 31, and a planting clutch 27 via a motor or solenoid. Connected

  The electric motor 110 also functions as a drive unit that operates in response to the operation of the elevation operation switch 361 that is an elevation operation member provided on the shift operation lever 36 or the operation on / off switch 362 that is an operation on / off member.

  The planting unit automatic lifting mechanism 300 includes a center float 62C, a lifting cylinder 25, and a switching valve 130 for switching the operation of the lifting cylinder 25. In the switching valve 130 according to the present embodiment, the switching operation is performed by the electric motor 110 in response to the operation of the elevation operation switch 361, and the switching valve 130 is automatically operated in accordance with the up and down rotation of the float 62 according to the unevenness of the field and the change in water depth. And the seedling planting unit 4 can be automatically raised and lowered.

  Here, a more specific configuration of the planting unit automatic lifting mechanism 300 will be described with reference to FIGS. 4 to 6. FIG. 4 is an explanatory view of a float side switching unit, FIG. 5 is an explanatory view showing a connection state of an elevation switching cable and an elevation arm, and FIG. 6 is an explanatory view of a valve side switching unit.

  The planting unit automatic lifting mechanism 300 includes the float side switching unit 301 shown in FIG. 4 and the valve side switching unit 302 shown in FIG. First, the float side switching unit shown in FIG. 4 will be described.

  As illustrated, the float-side switching unit 301 includes a float 62 rotatably attached to the seedling planting portion 4 and an elevating arm 64 that rotates in conjunction with the vertical rotation of the float 62. Further, the float-side switching unit 301 further includes a spring 67 that expands and contracts by rotation of the elevation arm 64, and a mounting plate 66 in which a rotation restricting portion 661 that restricts rotation of the elevation arm 64 is formed in a concave shape.

  That is, the lower end portion of the mounting plate 66 formed in the substantially vertically elongated S-shape and the planting unit frame 45 are connected by the plate connection link 630. At the upper end of the mounting plate 66, a float-side cable receiving member 275 is attached as a cable outer that receives the float-side end of a lift switching cable 270 that freely connects the lift arm 64 and the switching valve 130.

  A float connecting portion 643 is formed on the tip end side of the lift arm 64 rotatably attached to the mounting plate 66, and the float connecting portion 643 and the upper front side of the float 62 are connected by an arm connecting link 65.

The raising and lowering arm 64 has a wider intermediate portion provided with the rotation shaft 64 a serving as the rotation center,
The cable connection portion 644 which is formed in the front-rear direction so as to be gradually tapered is provided, and the rear end side is formed in a substantially beveled ball shape. The lower end of the spring 67 is connected to the attachment hole 641 provided in the cable connection portion 644, and the upper end of the spring 67 is attached to one end of the elevation switching cable 270. Since the spring 67 is interposed between the float 62 and the elevation switching cable 270, disconnection of the elevation switching cable 270 can be prevented as much as possible even if an unexpected tensile load is applied.

A stopper projection 642 is formed on the cable connecting portion 644 so as to protrude outward. On the other hand, the aforementioned rotation restricting portion 661 is formed at an intermediate portion of the substantially vertically elongated S-shaped mounting plate 66. Thus, in the present embodiment, when the float 62 is lowered, the stopper projection 642 engages with the rotation restricting portion 661 before the lower limit position on the lower side.
The rotation of the lift arm 64 is restricted. As described above, according to the present embodiment, the rotation restriction of the lift arm 64 can be realized with a simple structure, the number of failures and the like can be reduced, and the maintenance can be facilitated.

  In the float-side switching unit 301 according to the present embodiment, the ratio of the distance between the float connecting portion 643 and the rotating shaft 64a and the distance between the rotating shaft 64a and the cable connecting portion 644 is formed as 3: 2. ing. The ratio of the distance between the float connection portion 643 and the cable connection portion 644 centering on the rotation shaft 64a is appropriately set so that the elevation switching cable 270 has an appropriate movement amount with respect to the rotation amount of the float 62. It is good to do.

  Further, as shown in FIG. 4, the mounting plate 66 is provided with a cover body 68 that covers a portion between the lift arm 64 and the float-side cable receiving member 275. With such a cover body 68, for example, foreign matter can be prevented from being caught by the lifting switching cable 270 or the like during planting, and prevention of the lifting switching operation of the seedling planting unit 4 by the switching valve 130 is prevented. be able to.

  Further, a cable connection portion 644 provided at one end of the lift arm 64 is formed with a mounting hole 641 for mounting the lower end of the spring 67 attached to the lift switching cable 270. As shown in FIG. 5, when the lift arm 64 rotates, the rearmost position P on the rotation locus R drawn by the mounting hole 641 matches the position of the mounting hole 641 when the float 62 is grounded. The float side cable receiving member 275 is provided immediately above the position P.

  That is, conventionally, the attachment position of the float-side cable receiving member 275 with respect to the attachment plate 66 is not particularly considered, and is usually provided at a position indicated by a dashed dotted line in FIG. In that respect, in the present embodiment, as described above, the float-side cable receiving member 275 is attached immediately above the rearmost position P on the turning locus R drawn by the attachment hole 641.

  Therefore, when the float 62 is grounded, the vertical switching cable 270 takes a vertical posture, which prevents the load other than the upward direction from being applied to the mounting hole 641. In this way, the size of the mounting hole 641 changes with time, and as a result, it is prevented that the amount of rotation of the float 62 and the amount of elevation of the seedling planting part 4 do not match.

  As described above, since the constituent members of the float side switching unit 301 are arranged together with the mounting plate 66, the maintainability of the float side switching unit 301 is improved. Further, as the float side switching unit 301, a member for detecting the amount of rotation of the float 62 and a member for transmitting the detected amount of rotation are not necessary, so the number of parts can be reduced, and the configuration Can be simplified.

  Next, the valve side switching unit 302 will be described with reference to FIG. The valve-side switching unit 302 according to the present embodiment includes a valve-side mounting plate 210 formed in a predetermined shape, a switching valve 130 attached to the valve-side mounting plate 210, and an interlocking arm 121.

  The valve side mounting plate 210 is provided with a plurality of mounting holes 215 as illustrated, and can be mounted on the main frame 15 of the traveling vehicle body 2 by inserting mounting members such as bolts through the mounting holes 215. . In the present embodiment, the valve side mounting plate 210 is disposed on the side of the steering seat 41.

  The switching valve 130 includes a spool 131 provided at the time of movement, and is configured to open and close a predetermined port by movement of the spool 131 and to switch the operation of the elevating cylinder 25. With this configuration, the lifting and lowering operation of the lifting and lowering link mechanism 3 can be switched to the lifting mode, the lowering mode, and the lifting and lowering stop mode. Further, a stopper 132 is provided at a lower position of the spool 131 so as to restrict an excessive pressing of the spool 131 by the interlocking arm 121.

  The interlocking arm 121 abuts against the spool 131 of the switching valve 130 at its middle part and is connected to the other end of the elevation switching cable 270 connected to the float 62 at one end and pivotable at the base end to the valve side mounting plate 210 Is linked to The distal end side of the interlocking arm 121 is connected to one end of the interlocking arm 121 with the other end of the biasing spring 133 mounted on the valve side mounting plate 210 side, and is biased in a direction away from the switching valve 130.

  The above-mentioned valve side mounting plate 210 attached to the traveling vehicle body 2 is further provided with a valve side cable receiving member 276 and a sensitivity adjusting lever 280. The valve-side cable receiving member 276 receives the other end side portion of the elevation switching cable 270 on the switching valve 130 side, and is exposed above the valve-side mounting plate 210.

  In addition, the sensitivity adjustment lever 280 can change the initial position of the valve-side cable receiving member 276, and can change the position at which the elevation switching cable 270 operates the switching valve 130 by turning the float 62 up and down. That is, the sensitivity adjustment lever 280 can change the pulling amount by the elevation switching cable 270 by changing the position of the valve-side cable receiving member 276.

  The sensitivity adjustment lever 280 is disposed on the upper side of the valve side mounting plate 210. That is, the upper end portion of the valve side mounting plate 210 is bent at a substantially right angle, and the upper portion of the sensitivity adjustment lever 280 is projected upward from the bent portion, and the sensitivity adjustment lever 280 is moved to the bent portion every predetermined distance. The pulling amount by the raising and lowering switching cable 270 can be changed stepwise by forming a concave portion for locking and holding it in a suitable place.

  In the present embodiment, the valve-side cable receiving member 276 is exposed above the valve-side mounting plate 210, and the sensitivity adjustment lever 280 is disposed on the upper side of the valve-side mounting plate 210. Therefore, when the sensitivity adjustment lever 280 is operated, the amount of movement of the elevation switching cable 270 can be visually recognized, and the position at which the elevation switching cable 270 operates the switching valve 130 can be finely adjusted. Work height can be optimized. As a result, according to the seedling transplanting machine, the planting accuracy of the seedling can be further improved.

In the seedling transplanting machine according to the present embodiment, since the planting unit automatic lift mechanism 300 is configured as described above, the advancing and retracting operation of the lift cylinder 25 can be automatically switched with a very simple configuration. That is, a member for detecting the amount of rotation of the float 62 and a member for transmitting the detected amount of rotation are not necessary, the number of parts can be reduced, and the configuration can be simplified. In addition, when the float 62 rotates, the switching valve 130 is switched via the raising and lowering switching cable 270, and the raising and lowering cylinder 25 can be extended and retracted to raise and lower the seedling planting part 4. Therefore, since the seedling planting unit 4 can be moved up and down according to the amount of rotation of the float 62, the working height of the seedling planting unit 4 can be made to correspond to the depth of the field.
Planting accuracy of seedlings is improved.

  In addition, since the constituent members of the valve side switching unit 302 are collectively arranged on the removable valve side mounting plate 210, unnecessary parts detachment work becomes unnecessary, and the maintenance performance is improved.

  Here, with reference to FIGS. 7A and 7B, the vertical rotation of the float 62 and the rotation operation of the lift arm 64 will be described. FIG. 7A is an explanatory view showing the float 62 in the lowest position, and FIG. 7B is an illustration showing the float 62 in the maximum position.

  For example, when the seedling planting unit 4 is lifted, as shown in FIG. 7A, the tip of the float 62 is largely pivoted downward. At this time, the arm connection link 65 takes a substantially upright posture, and the lifting arm 64 connected to the arm connection link 65 takes a posture in which the cable connection portion 644 is pivoted upward. Therefore, the lifting / lowering switching cable 270 is loosened, and the interlocking arm 121 is pivoted away from the switching valve 130 by the biasing spring 133 as shown by the broken line in FIG. Therefore, the spool 131 is in the state of protruding outward.

  Further, at this time, as shown in FIG. 7A, a rotation restricting portion 661 in which a stopper projection 642 formed to project outward at the cable connection portion 644 is formed in a concave shape in the middle of the mounting plate 66. , And further rotation is restricted. Therefore, since the rotation of the lift arm 64 is restricted before the spring 67 exceeds the extension limit, it is possible to prevent the possibility of causing the spring 67 to extend excessively and not to contract thereafter.

  In addition, depending on the condition of the field, even when the seedling planting unit 4 is in the raised state, the tip of the float 62 is turned downward, but also in this case, if the descent degree of the float 62 is extremely large, The pivoting of the lifting arm 64 is restricted before the lower limit position.

  On the other hand, for example, when the field changes from deep to shallow largely (more than 30 cm), or when there is a large soil mass or stone, the tip of the float 62 is greatly upward as shown in FIG. 7B. Rotate. At this time, the arm connection link 6 and the lift arm 64 are in a jack knife-like posture in which each other is at an acute angle, and pull the lift switching cable 270 against the biasing spring 133 via the spring 67. The interlocking arm 121 of the switching unit 302 pushes the spool 131 of the switching valve 130 (see FIG. 6).

  Hereinafter, the other structure of the seedling transplanting machine which concerns on this embodiment is demonstrated, referring FIGS. 8-11B. FIG. 8 is an explanatory view showing the arrangement of the battery in a side view, and FIG. 9 is an explanatory view showing the arrangement of the battery in a plan view.

  Although not shown in FIGS. 1 and 2, as shown in FIGS. 8 and 9, a battery 600 is disposed on the left front of the steering seat 41 in the traveling vehicle body 2. That is, the battery stay 610 is provided in the middle of the seedling frame support 51 shown in FIG. 1 via the support stay 650, and the battery support 620 is attached to the battery stay 610 to arrange the battery 600. At this time, the plus terminal 601 of the battery 600 is disposed on the rear side of the machine, and the minus terminal 602 is on the front side of the machine. In the figure, reference numeral 600 a indicates a battery case that accommodates the battery 600.

  Conventionally, since the battery stay 610 is provided close to the support rod 190 of the side marker 19 (see FIG. 1), the arrangement structure including the battery 600 obstructs the view from the steering seat 41 to the side marker 19.

  Therefore, in the present embodiment, as shown in the figure, the battery stay 610 is attached so as to be positioned above the support bar 190 of the side marker 19 by a predetermined distance, and between the battery 600 and the support bar 190 of the side marker 19 To form a space. With this configuration, the visibility of the side marker 19 from the control seat 41 (see FIG. 1) is significantly improved.

  Further, as illustrated, in the present embodiment, the harness clamp 605 of the battery 600 is provided at the rear of the body of the battery stay 610, and the battery harness (not shown) is clamped at such a position to make the battery harness a side marker. It is prevented from dripping to the 19 side. Therefore, the visibility of the side marker 19 by the worker is also improved by this configuration.

  Further, as illustrated, the fuse box 603 is attached to a mounting plate 603a provided on the rear side of the battery case 600a. Therefore, since fuse box 603 can be disposed at a position close to battery 600, the length of the battery harness can be shortened. Therefore, even if the battery harness is damaged or needs to be replaced, the length of the necessary harness can be short, and the cost is low.

  Also, at this time, the fuse box 603 may be disposed at a height at which the whole is covered by the battery cover 604. Even if water drips from the spare seedling frame 50 located on the battery 600, it can be waterproofed by the battery cover 604. Therefore, the possibility of the battery 600 and the fuse box 603 being flooded with water and shorting can be prevented.

  Further, as shown in FIG. 9, it is preferable that the shape of the battery cover 600a is asymmetrical to the left and right. As described above, the left-right asymmetry eliminates the possibility of mounting the battery cover 600a in an incorrect mounting posture.

  When connecting the battery harness to the battery via a clamp or the like, it is desirable that both the positive side and the negative side have substantially the same height as the upper surface of the battery 600 or a height that suppresses the protruding force from the upper surface as much as possible. As a result, the battery harness can be easily accommodated in the vertical interval between the battery and the battery cover 600a, and the protective effect of the battery 600 on the battery cover 600a is prevented from being hindered. At this time, for example, the harness clamp 605 may be attached to the mounting plate 603 a of the fuse box 603 in an out-of-plane manner. With this configuration, the terminals of the battery 600 can not be attached incorrectly by mistake.

  Next, with reference to FIG. 10A and FIG. 10B, the structure of the engine base which installs the engine 30 of a seedling transplanting machine is demonstrated. FIG. 10A is a plan view of the engine base, and FIG. 10B is a side view of the engine base.

  As illustrated, the engine 30 of the seedling transplanting machine according to the present embodiment positions and mounts a rectangular frame-shaped engine base 150 at a predetermined position of the main frame 15, and mounts the engine 30 on the engine base 150. ing. The positioning of the engine base 150 with respect to the main frame 15 is, for example, as shown in FIG. 10A, providing three reference holes consisting of a first reference hole 151, a second reference hole 152 and a third reference hole 153 on the main frame 15 side. The rectangular engine base 30 may be attached with the first to third reference holes 151 to 153 as marks. Therefore, since the engine 30 is correctly installed without shifting, there is no risk of the belt line formed by the transmission belt 14b stretched between, for example, the HST 14 from being shifted, and the traveling vehicle body including the mount of the engine 30 Assembly of 2 becomes easy.

  In FIG. 10A, reference numeral 154 denotes a first engine mount unit, and reference numeral 155 denotes a second engine mount unit. A pair of left and right first engine mounts 154 are disposed on the front and rear sides of the engine base 150 at intervals in the left-right direction. Then, between the left and right first engine mounts 154 on the rear side, a pair of left and right second engine mounts 155 which are longer in the front-rear direction than the left and right first engine mounts 154 are arranged at predetermined intervals. In the first engine mount 154 and the second engine mount 155, holes for inserting fixing members such as bolts for fixing the engine 30 are respectively formed.

  The first engine mounts 154 are disposed in an inclined attitude toward the upper front of the machine, and disposed in an inclined attitude toward the upper rear of the machine. On the other hand, the second engine mount 155 has an inclination attitude smaller than that of the first engine mount 154 on the rear side of the airframe or is in a horizontal attitude with the main frame 15.

  By providing the first engine mount 154 on the front and rear of the engine base 150, the mounted engine 30 can be fixed at four points, so that the engine 30 falls off even if it receives the weight and vibration of the engine 30. Is prevented. Further, by providing the left and right second engine mounts 155 longer in the front-rear direction than the first engine mount between the left and right first engine mounts 154 on the rear side, the range in which the engine base 150 receives the engine 30 is As it becomes longer in the front-rear direction, the weight of the engine 30 is dispersed and damage to the engine base 150 is prevented.

  Then, by setting the first engine mount 154 to be inclined toward the front or back of the machine, and by making the inclination of the second engine mount 155 smaller than that of the first engine mount 154 or to be horizontal with the main frame 15 Since the engine 30 can be fitted to the front and rear slopes and the flat bottom surface of the engine 30, the engine 30 is more difficult to drop off.

  Also, conventionally, a tension pulley 351 for adjusting the tension of the transmission belt 14b for transmitting the output of the engine 30 to the continuously variable transmission (HST) 14 is fixed to the engine 30 via the arm body. The vibration of the arm 30, particularly the vibration direction, may become unstable and intense due to the vibration of the engine 30, and there is a possibility that the tension pulley 351 may be broken in a short period of time.

  So, in this embodiment, as shown to FIG. 10B, the support arm 352 which is an arm body which supports the tension pulley 351 is being fixed to the engine base 150 side. That is, the base end of the support arm 352 is rotatably connected to a bracket 353 fixed to the engine base 150 via a spring (not shown) biased to turn upward, and this is used as a fulcrum . Therefore, the support arm 352 and the spring become one rigid body, the vibration of the support arm 352 is stabilized, the durability is improved, and it contributes to the protection of the tension pulley 351 and other peripheral parts.

  Next, with reference to FIGS. 11A and 11B, the high temperature prevention structure of the engine 30 mounted on the seedling transplanting machine according to the present embodiment will be described.

  That is, the engine 30 disposed in the lower part of the control seat 41 is air-cooled, and as shown in FIG. 11A, the air cleaner 320 is disposed in the upper part of the engine main body 310. An engine intake port 311 is formed in front of the engine body 310. On the other hand, an air cleaner intake port 313 is formed in front of the air cleaner 320 in the same direction as the engine intake port 311. In addition, an air cleaner cover 330 is attached to the front of the engine 30.

  In the engine 30, the air introduced from the engine intake port 311 becomes high temperature and is exhausted, but a part thereof is exhausted from the exhaust hole 312 between the engine main body 310 and the air cleaner 320. Therefore, the temperature is 50 to 80 degrees below the air cleaner cover 330, so that the temperature on the floor step 33 is also high, which may reduce the working efficiency of the worker. In addition, the high temperature exhaust gas from the exhaust hole 312 may enter the air cleaner intake port 313 and reduce the combustion efficiency of the engine 30.

  Therefore, as shown in FIG. 11A, a flange portion 345 is provided between the air cleaner intake port 313 and the exhaust hole 312 located below it. Therefore, the high temperature exhaust gas from the exhaust hole 312 flows into the engine intake port 311 where air is taken by the cooling fan, and hardly enters the air cleaner intake port 313. Therefore, the combustion efficiency of the engine 30 is not reduced, and the amount of high temperature heat released to the outside is reduced, so that the floor step 33 can be prevented from becoming extremely hot. In addition to the one integrally formed as shown in the drawings, for example, a separate plate formed in a bowl shape may be attached later.

  Also, conventionally, the hot air on the air cleaner cover 330 may be sucked from the air cleaner inlet 313. Therefore, it is conceivable that the upper part of the engine 30 is covered by the engine cover 350 together with the air cleaner cover 330, and the hot air of the upper part of the air cleaner cover 330 is discharged to the outside from the air hole 355 formed in the engine cover 350.

  At this time, a sponge, for example, is disposed on the upper part of the air cleaner cover 330 to form a sealed space between the upper part of the acleaner cover 330 and the air hole 355, and the hot air on the upper part of the air cleaner cover 330 is more reliable. The air may be discharged from the air hole 355. At this time, if the opening and closing amount of the engine cover 350 is increased, the sponge is gradually crushed, and the sealed space formed between the upper portion of the air cleaner cover 330 and the air hole 355 may not be a sealed space.

  Therefore, as an example of the high temperature prevention structure of the engine 30, as shown in FIG. 11B, a rectangular frame-shaped sealing sponge 346 capable of completely surrounding the top of the air cleaner cover 330 is disposed on the back surface of the engine cover 350. be able to. With this configuration, a sealed space is formed between the upper portion of the air cleaner cover 330 and the air hole 355, and the hot air of the upper portion of the air cleaner cover 330 can be reliably discharged from the air hole 355 to the outside. . Moreover, even if the amount of opening and closing of the engine cover 350 is increased, there is no possibility that the sealing sponge 346 loses its shape or the like.

  The following seedling transplanting machine is realized from the embodiment described above.

  (1) A lift link mechanism 3 for raising and lowering the seedling planting unit 4 attached to the rear of the traveling vehicle body 2, a lift cylinder 25 for lifting and lowering operation by the lift link mechanism 3, and a turnable attachment to the seedling planting unit 4 Further, the elevating cylinder 25 is extended and retracted according to the rotation of the float 62 for leveling the overhead scene, and the switching valve 130 for raising and lowering the elevating link mechanism 3 and the elevating arm 64 for rotating in conjunction with the rotation of the float 62 And a seedling transplanting machine provided with a lift switching cable 270 connecting the lift arm 64 and the switching valve 130.

  (2) In the above (1), the spring 67 which is expanded and contracted by the rotation of the lift arm 64, the mounting plate 66 for mounting the float side cable receiving member 275 which receives the lift switching cable 270 on the float 62 side, And a rotation restricting portion 661 for restricting the rotation of the lift arm 64. The rotation restricting portion 661 restricts the rotation of the lift arm 64 in front of the lower limit position on the descent side of the float 62. Porting machine.

  (3) In the above (2), the lifting arm 64 is provided with the float connecting portion 643 on the tip end side across the rotating shaft 64 a, while the cable connecting portion 644 is provided on the rear end side. When the downward turning angle reaches a predetermined angle, the stopper projection 642 formed so as to project outward in the cable connection portion 644 engages with the turning restricting portion 661 provided in the middle of the mounting plate 66 Seedling transplanting machine.

  (4) In the above (2) or (3), a mounting hole 641 for attaching one end of the lifting / lowering switching cable 270 is formed at one side end of the lifting arm 64. A position P on the rearmost side of the body on the rotation locus R drawn by the hole 641 matches the position of the mounting hole 641 when the float 62 is grounded, and the float side cable receiving member 275 is directly above the position P. The seedling transplanting machine provided.

  (5) In the above (4), the lifting and lowering switching device 130 has a valve mechanism for switching the expansion and contraction of the lifting and lowering cylinder 25 by the movement of the spool 131, and the actuating member 121 for advancing and retracting the spool 131 The seedling transplanting machine is connected to the parts and the movement amount of the position where the raising and lowering switching cable 275 is attached in the raising and lowering arm 64 is larger than the moving amount of the raising and lowering switching cable 270 on the switching valve 130 side.

  (6) The seedling provided with the cover body 68 which covers the part between the raising / lowering arm 64 and the float side cable receiving member 275 in the raising / lowering switching cable 270 to the attachment plate 66 in any of the above (2) to (5). Porting machine.

  (7) In the above (1) to (6), the traveling vehicle body 2 receives the valve side cable receiving member 276 which receives the other end side portion of the lifting switching cable 270 on the switching valve 130 side, and the position of the valve side cable receiving member 276 And the valve-side mounting plate 210 provided with the sensitivity adjustment lever 280, the sensitivity adjustment lever 280 changing the position at which the elevation switching cable 270 operates the switching valve 130 by rotating the float 62 up and down. The side cable receiving member 276 is exposed above the valve side mounting plate 210, and the sensitivity adjustment lever 280 is disposed on the upper side of the valve side mounting plate 210.

  The embodiments described above are merely examples, and are not intended to limit the scope of the invention. Each embodiment can be implemented in other various forms, and various omissions, replacements, combinations, and changes can be made without departing from the scope of the invention. In addition, the specifications (structure, type, direction, shape, size, length, width, thickness, height, number, placement, position, material, etc.) of each configuration, shape, display element, etc. are appropriately changed. Can be implemented.

2 traveling vehicle body 4 seedling planting section 62 float 64 lifting arm
67 spring 68 cover body (cover)
210 Mounting plate 270 Lifting switch cable 275 Float side cable receiving member (cable receiving member)

Claims (2)

A seedling planting unit (4) is provided on the traveling vehicle body (2) so as to be able to move up and down, and a float (62) is rotatably provided on the seedling planting unit (4) to level the flooding scene. A lift arm (64) that rotates in conjunction with the rotation is provided, and a lift switching device (130) that lifts and lowers the seedling planting part (4) is provided, and the lift arm (64) and the lift switching device (130) A cable receiving member (275) for receiving the lifting and lowering switching cable (270) above the lifting and lowering arm (64), via the continuously variable transmission (14). An engine (30) for transmitting power to the transmission case (13) on the main frame (15) of the traveling vehicle body (2) ;
When the float (62) does not raise or lower the seedling planting part (4), a part of the lifting switching cable (270) located between the lifting arm (64) and the cable receiving member (275) Vertical attitude,
The engine (30) is mounted on a rectangular frame-shaped engine base (150) attached to a predetermined position of the main frame (15), and the output of the engine (30) is tensioned by a tension pulley (351). The proximal end of a support arm (352), which is transmitted to the continuously variable transmission (14) via a transmission belt (14b) to be adjusted, and which supports the tension pulley (351) is the engine base (150). In the seedling transplanting machine rotatably connected via a spring to a bracket (353) fixed to the
The engine (30) is air cooled and
An engine body (310) in which an engine intake port (311) is formed;
An air cleaner (320) disposed at an upper portion of the engine body (310) and having an air cleaner intake port (313) facing in the same direction as the engine intake port (311);
A flange portion (345) provided between the air cleaner intake port (313) and an exhaust hole (312) located below the air cleaner intake port (313);
An air cleaner cover (330) mounted in front of the engine body (310) and the air cleaner (320);
An air hole (355) for exhausting the hot air in the upper portion of the air cleaner cover (330) is formed, and a frame-like sealing sponge (346) surrounding the upper portion of the air cleaner cover (330) is disposed on the back surface. , seedling transplantation machine, characterized in Rukoto includes an engine cover (350), a covering the upper portion of the engine with the air cleaner cover (330) (30). The lift switching device (130)
It has a spool (131) that switches the expansion and contraction of a lift cylinder (25) that raises and lowers the seedling planting section (4),
The traveling vehicle body (2) is
A valve side mounting plate (210) on which the lifting and lowering switching device (130) is mounted;
The valve side mounting plate (210)
A valve-side cable receiving member (276) for receiving the other end side portion of the elevation switching cable (270);
A sensitivity adjustment lever that changes the position of the valve-side cable receiving member (276) and changes the position at which the elevation switching cable (270) operates the elevation switching device (130) by rotating the float (62) up and down (280),
The elevation switching cable (270) whose proximal end is pivotally connected to the valve side mounting plate (210) and whose midway portion abuts on the spool (131) and whose one end is connected to the float (62) And an interlocking arm (121) connected to the other end of the
The valve side cable receiving member (276) is exposed above the valve side mounting plate (210), and the sensitivity adjusting lever (280) is disposed on the upper side portion of the valve side mounting plate (210). The seedling transplanting machine according to claim 1, characterized in that.

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