JP2007228975A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type rice transplanter having a simplified structure for attaching step floors. <P>SOLUTION: This riding type rice transplanter to whose travel vehicle 1 a seedling-planting device 3 is attached through a lifting link device 2 is characterized by forming a step floor of the travel vehicle 1 from a main step floor 19 and a pair of right and left substep floors 20 disposed on the right and left sides of the main step floor 19, disposing many lattices having downward penetrated spaces in the substep floors 20, supporting the main step floor 19 and the right and left substep floors 20 with the floor support frame 21 of the travel vehicle 1 from the lower side, and supporting a step 26 disposed on the outside of the substep floors 20 with the floor support frame 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a riding type rice transplanter in which a sub step is provided outside a main step.

Conventionally, a riding type rice transplanter having a seedling planting device on a traveling vehicle body is known, but Japanese Patent Application Laid-Open No. 10-117525 discloses a device in which a sub-step is provided outside a main step of getting on and off a cockpit. Has been.
JP-A-10-117525

  The riding type rice transplanter disclosed in Japanese Patent Application Laid-Open No. 10-117525 is provided with a side step floor having a large number of grids having spaces penetrating downward on the outside of the main step floor. The side step floor mounting frame is attached to the step floor mounting frame, and the main step floor and the side step floor are fitted on the frames, respectively.

  The subject of this invention is providing the riding type rice transplanter which simplified the attachment structure of the step floor.

  In the riding type rice transplanter in which the seedling planting device 3 is attached to the traveling vehicle 1 by the lifting link device 2, the step floor of the traveling vehicle 1 is defined as the main step floor 19 and the main step floor 19. A pair of left and right sub-step floors 20 provided on the left and right are provided. The sub-step floor 20 is provided with a large number of grids with spaces penetrating downward, and the main step floor 19 is supported by a floor support frame 21 of the traveling vehicle 1. The sub-step floor 20 is supported from the lower side, and the riding-type rice transplanter supports the boarding step 26 provided outside the sub-step floor 20 by the floor support frame 21.

  Therefore, the step floor of the traveling vehicle 1 is constituted by a main step floor 19 and a pair of left and right sub step floors 20 provided on the left and right sides of the main step floor 19, and the sub step floor 20 has a space portion penetrating downward. In addition to providing a large number of grids, the main step floor 19 and the sub step floor 20 are supported from the lower side by the floor support frame 21 of the traveling vehicle 1, and the floor support frame 21 is provided outside the sub step floor 20. Since the boarding / alighting step 26 is supported, the structure for supporting the main step floor 19, the sub-step floor 20, and the boarding / alighting step 26 can be performed with a simple floor support frame 21.

  According to the second aspect of the present invention, the main step floor 19 supports the outer peripheral portion of the sub-step floor 20, and the sub-step floor 20 is fitted and supported in the opening of the main step floor 19, and the floor support frame The riding type rice transplanter according to claim 1, wherein 21 is provided in the left-right direction below the sub-step floor 20.

  Therefore, in addition to the operation of the invention described in claim 1, the main step floor 19 supports the outer peripheral portion of the sub step floor 20, and the sub step floor 20 is fitted and supported in the opening of the main step floor 19. Therefore, not only can the support frame structure of the entire floor be simplified, but the support rigidity of the sub-step floor 20 can be increased by supporting the outer periphery of the sub-step floor 20 with the main step floor 19. Further, since the floor support frame 21 is provided in the left-right direction below the sub-step floor 20, the support frame 21 seen from above the sub-step floor 20 with the space is formed in a straight line in the left-right direction and is neatly designed. ing.

By configuring the riding type rice transplanter as described above, the entire floor and the support frame configuration of the getting-on / off step 26 can be simplified.
Moreover, the support rigidity of a substep floor increases by setting it as the structure which supports the outer peripheral part of the substep floor 20 with the main step floor 19. FIG. Further, by providing the floor support frame 21 in the left-right direction below the sub-step floor 20, the support frame 21 seen from above the sub-step floor 20 with the space is formed in a straight line in the left-right direction and is neatly designed. .

An eight-row planting rice transplanter as an embodiment of the traveling vehicle body of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall side view of a riding type rice transplanter of the present invention, and FIG. 2 is a plan view of a front half of the rice transplanter of FIG. As shown in the side view of FIG. 1, in the riding type rice transplanter, a seedling planting device 3, which is a kind of working device, is mounted on a traveling vehicle 1 by a lifting and lowering link device 2 including a horizontal link 2 a and a vertical link 2 b. In addition, a fertilizer application device 4 is provided, and is configured to function as a riding fertilizer planting machine as a whole. The traveling vehicle 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6 and 6 and rear wheels 7 and 7 as drive wheels.

  A mission case 11 and an engine 12 are disposed on the main frame 10 in the front-rear direction. A hydraulic pump 13 is integrally assembled on the rear upper surface of the mission case 11, and a steering post 14 is provided from the front of the mission case 11. It protrudes upward.

  A steering handle 16 and an operation panel 17 are provided at the upper end of the steering post 14. A step 19 serving as a control floor is attached to the upper part of the fuselage, and a cockpit 15 is installed above the engine 12. The front wheels 6, 6 are pivotally supported by front wheel support cases 22, 22 provided on the side of the mission case 11 so that the direction can be changed. The rear wheels 7 and 7 are pivotally supported by rear wheel support cases 24 and 24 that are integrally attached to the left and right ends of the rolling rod 23. The rolling rod 23 is supported by a rolling shaft 25 protruding from the rear end of the main frame 10 so as to be rotatable in a plane perpendicular to the traveling direction.

  The rotational power of the engine 12 is transmitted to the counter shaft 32 that is the drive shaft of the hydraulic pump 13 via the belt 31, and further transmitted from the counter shaft 32 to the input shaft 35 of the hydraulic transmission HST via the belt. It is transmitted from the output shaft 36 of the hydraulic transmission HST to the mission input shaft 34 via a belt.

In addition, a center mascot 73 is provided at the front center portion of the aircraft as an indicator of straight running.
The seedling planting device 3 is mounted on the traveling vehicle 1 so as to be movable up and down by the lifting link device 2. The configuration for raising and lowering and the configuration of the seedling planting device 3 will be described. First, a piston upper end portion of a general hydraulic cylinder 60 (FIG. 1) whose base is rotatably provided in the traveling vehicle 1 is connected to the lifting link device 2, and an electromagnetic is generated by a hydraulic pump 13 provided in the traveling vehicle 1. The seedling planting device 3 that is connected to the lifting and lowering link device 2 by supplying and discharging pressure oil to and from the hydraulic cylinder 60 via a hydraulic valve (not shown) and extending and retracting the piston of the hydraulic cylinder 60 is moved up and down. It is configured to be moved.

  The seedling planting device 3 is supported by a planting transmission case 62 that also serves as a frame mounted on the rear portion of the lifting link device 2 via a rolling shaft, and a support member provided in the planting transmission case 62. Seedling mounting base 63 that reciprocates in the left-right direction of the machine body and seedling planting that is attached to the rear end portion of the planting transmission case 62 and splits seedlings one by one from the lower end of the seedling mounting base 63 to be planted in the field. , And a sensor float 65, a side float 66, etc., which are leveling bodies whose rear part is pivotally supported at the lower part of the planting transmission case 62 and whose front part is swingable up and down. Yes. The sensor float 65 and the side floats 66 are provided to level the field and level the front of the field where the seedlings are planted by the seedling planting tools 64.

  The PTO transmission shaft 67 has universal joints at both ends, and is provided to transmit the power of the fertilization drive case 68 to the planting transmission case 62 of the seedling planting device 3. The elevating link sensor 69 is a potentiometer that is provided between the column 5 (FIG. 1) erected on the main frame 10 and the parallel link members 2a and 2b that move up and down of the elevating link device 2 and detects the movement of the link 69a. .

  Based on the detection of the vertical position of the front part of the sensor float 65 by the angle-of-attack sensor 71, the electromagnetic hydraulic valve is controlled by a control device (not shown) and the vertical position of the seedling planting device 3 is controlled by the hydraulic cylinder 60. It is configured.

  That is, when the front part of the sensor float 65 is lifted to an appropriate range or more by an external force, the hydraulic oil pumped out from the transmission case 11 by the hydraulic pump 13 is sent to the hydraulic cylinder 60 to cause the piston to protrude and move up and down. The link device 2 is moved up to raise the seedling planting device 3 to a predetermined position. Further, when the front part of the sensor float 65 falls below the proper range, the pressure oil in the hydraulic cylinder 60 is returned into the mission case 11 and the lifting link device 2 is moved downward to bring the seedling planting device 3 into a predetermined position. To lower. When the front part of the sensor float 65 is in an appropriate range (when the seedling planting device 3 is in an appropriate predetermined position), the pressure oil in the hydraulic cylinder 60 is stopped and the seedling planting device 3 is kept constant. It is provided to be held in position. In this way, the sensor float 65 is used as a ground sensor for automatic height control of the seedling planting device 3.

  FIG. 2 shows a plan view of the floor portion of the cockpit 15, but the step floor has a main step floor 19 without a space penetrating downward and a sub-step floor 20 having a large number of lattices with spaces penetrating downward, The main step floor 19 and the pair of left and right sub step floors 20 and 20 are arranged at the same height.

  The feature of the present embodiment is that an opening is provided in a portion where a pair of left and right sub-step floors 20 and 20 is arranged in a steel plate or a resin plate constituting the main step floor 19, and the sub-step floors 20 and 20 are provided in the openings. It is set as the structure which supports the outer peripheral part of the substep floors 20 and 20 by the fitting and the inner peripheral part of an opening part. Further, the steel plate or resin plate constituting the main step floor 19 is provided with openings in the cockpit 15 and the portion where the engine 12 and its related parts below the cockpit 15 are arranged.

  In addition, a floor support frame 21 that supports the main step floor 19 at the left and right side positions of the pair of sub-step floors 20 and 20 is provided below the steel plate or the resin plate constituting the main step floor 19. The floor support frame 21 is supported by contacting the sub-step floors 20 and 20 from below the sub-step floors 20 and 20. The floor support frame 21 is supported by the vehicle body frame 18.

  In the floor configuration described above, not only the floor support frame 21 can be simplified, but also the support of the sub-step floors 20 and 20 is strengthened, and the rigidity of the sub-step floors 20 and 20 itself is larger than before.

  Furthermore, boarding steps 26, 26 are provided outside the sub-step floors 20, 20, and the support frames 21, 21 that support the boarding steps 26, 26 from the inside of the sub-step floors 20, 20 are the floor support frames 21, 21. And combined use. In this way, the floor support frames 21 and 21 and the support frames of the getting-on / off steps 26 and 26 can be shared by the single support frame 21 and 21, thereby simplifying the frame configuration and reducing the number of frame parts, resulting in the overall Is effective in reducing weight.

  Moreover, since there is no attachment member of the connection part of the support frames 21 and 21 of the sub-step floors 20 and 20 and the support frames 21 and 21 of the getting-on / off steps 26 and 26 unlike the past, it is neatly designed.

  Further, portions of the support frame 21 that support the left and right outer ends of the body frame 18 and the main step floor 19 are disposed on the left and right outer sides of the sub step floor 20 so that the support frame 21 can be seen from above the sub step floor 20 with a space. , 21 are formed in a straight line (straight) in the left-right direction, and the straight support frames 21, 21 are substantially parallel to the grid in the left-right direction of the sub-step floor 20 in the vicinity thereof. It is neatly designed.

  The rear portion (rear step portion) of the main step floor 19 can also be used as the wall surface of the fuel tank 29 as shown in FIG. Thus, particularly when a large-capacity fuel tank 29 is provided, it is possible to reduce the size of the rice transplanter by securing a space for the fuel tank 29.

  FIG. 4 is a front view of a rice transplanter according to another embodiment of the present invention. A battery 40 and a fuel tank 29 are provided in a space surrounded by the steering post 14, and a fuel supply port 29 a of the fuel tank 29 is provided in the battery 40. The battery 40 and the fuel filler port 29a may be disposed at positions opposite to the left and right with respect to the center of the machine body when viewed from the front side of the rice transplanter.

  The fuel inlet 29a of the fuel tank 29 is disposed below the battery 40 and on the opposite side to the battery 40 with respect to the center of the machine as viewed from the front side of the rice transplanter. Can be prevented, and the safety of refueling work can be secured.

  Further, since the projecting portion 29b in which the central portion of the fuel tank 29 is expanded downward is provided, the fuel can be sufficiently supplied into the fuel tank 29 even if the airframe is inclined in the left-right direction. In addition, if a fuel amount measuring unit (not shown) is provided at the center of the tank 29 where the amount of oil is the largest, the reliability of the fuel gauge is improved more than ever.

  Further, as shown in the side view of the airframe of the fuel tank installation portion in FIG. 5, the fuel tank stay 41 is also configured to serve as a guard and a traction hook for the fuel tank 29, thereby reducing the number of parts and reducing the weight. .

  Further, the inter-stock lever 43 (FIG. 2) is arranged on the engine cover, that is, in the vicinity of the side portion of the cockpit 15 and on a surface that is one step lower than the rear portions of the step floors 19 and 20 (the floor surface of the rear step portion). By arranging the inter-stock lever 43 at a low position in this way, the inter-stock lever 43 is not switched unless the lever is consciously operated, so that an unexpected operation of the inter-stock lever 43 can be prevented. Other levers such as a saddle clutch lever may be arranged together with or between the inter-lever lever 43.

  The present invention includes a riding type rice transplanter provided with a turning linkage mechanism that performs turning by controlling the left and right rear wheels by turning on and off the left and right side clutches by a steering operation of a predetermined angle or more from a straight traveling state of the front steering wheel. It can be used for riding-type work machines.

It is a whole side view showing a riding type rice transplanter which is one example of the present invention. It is a top view of the front half of the riding type rice transplanter shown in FIG. It is the schematic of the top view (FIG. 3 (a)) and side view (FIG.3 (b)) of the front half of the riding type rice transplanter shown in FIG. It is the front schematic of the riding type rice transplanter of the other Example of this invention. It is the side surface schematic of the fuel tank installation part of the riding type rice transplanter of the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling vehicle 2 Elevating / lowering link device 3 Seedling planting device 4 Fertilizer 5 Post 6 Front wheel 7 Rear wheel 10 Main frame 11 Transmission case 12 Engine 13 Hydraulic pump 14 Steering post 15 Steering seat 16 Steering handle 17 Operation panel 18 Body frame 19 Main step floor 20 Sub step floor 21 Floor support frame 22 Front wheel support case 23 Rolling rod 24 Rear wheel support case 25 Rolling shaft 26 Entry / exit step 29 Fuel tank 29a Refueling port 29b Protruding portion 31 Belt 32 Counter shaft 34 Mission input shaft 35 HST input Axis 36 Output shaft 40 Battery 41 Fuel tank stay 43 Stock lever 60 Hydraulic cylinder 62 Planting transmission case 63 Seedling stage 64 Seedling planting tool 65 Center float 66 Side float 67 TO transmission shaft 68 Fertilization drive case 69 lifting link sensor 71 Mukai angle sensor 73 Center Mascot

Claims (2)

  In a riding type rice transplanter in which a seedling planting device (3) is mounted on a traveling vehicle (1) by a lifting link device (2), the step floor of the traveling vehicle (1) is a main step floor (19) and the main step floor. A pair of left and right sub-step floors (20) provided on the left and right sides of (19). The sub-step floor (20) is provided with a large number of grids with spaces penetrating downward, and the traveling vehicle (1). The main step floor (19) and the sub-step floor (20) are supported from below by the floor support frame (21), and the boarding / alighting provided on the outside of the sub-step floor (20) by the floor support frame (21) Riding type rice transplanter characterized by supporting step (26).   The main step floor (19) supports the outer periphery of the sub step floor (20), and the sub step floor (20) is fitted and supported in the opening of the main step floor (19). The riding type rice transplanter according to claim 1, wherein (21) is provided in the left-right direction below the sub-step floor (20).

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