JP2008199992A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle capable of effectively fertilizing a field by efficiently blowing air from a blower to a fertilizing hose with a relatively simple construction. <P>SOLUTION: A seedling planting unit 7 liftably installed in the rear portion of a machine body 1, a fertilizer tank 41 in front of the seedling planting unit 7, a fertilizer delivering unit 42 in the lower portion of the tank 41, an air chamber 48 for temporarily storing pressurized air for transferring grain delivered from the delivery unit 42, a blower 47 for feeding the pressurized air to the chamber 48, and transfer pipes 43 for transferring the grain to a fertilizer discharge unit 44 connected to the chambers 48 are installed to the vehicle. The air chamber 48 is arranged to be ranging both ends of lateral width direction, two or more transfer pipes 43 are concentratively connected to the air chamber 48 on both sides, the cross section of the air chamber 48 in the middle part of the lateral width direction to which the transfer pipes 43 are not connected are brought to be smaller than those of the both ends. Thus, the pressure in the air chamber 48 can be retained and the fertilizer is certainly transferred. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work vehicle such as a riding rice transplanter.

A seedling planting device in a riding type rice transplanter, which is currently widely used, is connected to the rear of the traveling vehicle body, and when seedlings are planted, they are lowered onto paddy fields to plant seedlings. In parallel with the seedling planting work, the fertilizer made of powder is dropped from the fertilizer into a fertilizer groove formed near the side of the seedling planting strip. At this time, in the conventional fertilizer application device, the fertilizer feeding unit below the fertilizer tank is fed downward by a predetermined amount, and the fed granular fertilizer is blown from the blower provided on the side of the fertilizer feeding unit to the air chamber and It is designed to be dropped into the fertilizer groove via a fertilizer hose.
JP 2004-81099 A

The fertilizer application disclosed in the patent document and the like is configured to blow air from a blower into a fertilizer hose via a connection pipe via a plurality of air chambers arranged in the entire body width direction. Therefore, it is necessary to provide a fertilizer hose for each air chamber.
An object of the present invention is to provide a work vehicle capable of effectively applying fertilization to a farm field by efficiently sending air from a blower to a fertilization hose with a relatively simple configuration.

The above-mentioned problem of the present invention is solved by the following means.
That is, a prime mover (9), a traveling machine body (1) that travels with the power from the prime mover (9), a working device (7) that can be moved up and down on the rear side of the traveling machine body (1), and a traveling machine body (1) A rear part of the powder storage tank (41) provided on the front side of the working device (7), and a powder feed part (42) provided in the lower part of the storage tank (41), An air chamber (48) for temporarily storing the pressure air for transferring the powder material fed by the powder material delivery unit (42), and a blower for supplying the pressure air to the air chamber (48) ( 47) and a transfer pipe (43) for transferring the powder fed from the powder feed part (42) connected to the air chamber (48) from the air chamber (48) to the powder discharge part (44). ) And the air chamber (48) in the transverse direction perpendicular to the traveling direction of the traveling machine body (1). The horizontal width direction of the air chamber (48) which is arranged over both ends, is connected to a plurality of transfer pipes (43) in a concentrated manner on the air chambers (48) on both sides, and is not connected to the transfer pipe (43). This is a work vehicle in which the cross-sectional area of the intermediate portion is smaller than both end portions.

  According to the present invention, the pressure in the air chamber (48) can be maintained, and the granular material can be reliably transferred.

A four-row planting type rice transplanter as an embodiment of the present invention will be described in detail with reference to the drawings. A side view of the riding rice transplanter is shown in FIG. 1, and a plan view is shown in FIG.
A pair of left and right front wheels 2 and 2 and rear wheels 3 and 3 serving as traveling wheels are installed before and after the traveling machine body 1. On the front step 6 (the base part of the driver's seat 8 is the step 6a and the rear part of the front step 6 is the step 6b which is the rear wheel cover). The seedling planting part 7 is attached to the rear part of the machine body so that it can be moved up and down. A driver's seat 8 is provided on the rear side of the operation box 4, and an engine 9 that transmits power to each part of the rice transplanter is mounted below the driver's seat 8. The rear portion of step 6 also serves as a fender cover for the rear wheel 3. In this specification, the left direction and the right direction toward the forward side of the riding rice transplanter are referred to as the left side and the right side, respectively.

  The seedling planting unit 7 includes a seedling mounting tank 10 that reciprocates left and right, a planting device 11 that cuts out one seedling and transplants it into the soil, a float 12 that levels the seedling planting surface, and the like. The engine 9 is driven to transmit to an input shaft (not shown) via the engine output pulley 13, the transmission belt 14 b and the mission input pulley 15, and the power is transmitted into the mission case 17 by the input shaft.

  The transmission is transmitted from the transmission case 17 to the left and right front wheel drive case 19 through a front wheel axle case projecting in the left and right direction, and the front wheel axle 20 is driven to rotate to drive the left and right front wheels 2 and 2. Also, left and right rear wheel transmission shafts 21 for transmitting power from the rear part of the transmission case 17 to the rear are provided, and the left and right rear wheel transmission shafts 21 are driven to transmit into the left and right rear wheel transmission cases 22 to The wheel axle 23 is rotationally driven to drive the left and right rear wheels 3 and 3.

  The seedling planting section 7 is provided so as to be moved up and down by the vertical movement of the lifting link mechanism 25 by expansion and contraction of the hydraulic lifting cylinder 24. In addition, the seedling planting portion 7 is configured to operate by being transmitted by a planting transmission shaft 26 extending rearward from the case 17 by the power from the transmission case 17.

  The steering handle 5 is steered by steering the left and right front wheels 2 and 2 via a steering shaft 27 and a pitman arm (not shown), a tie rod, and the like. A main transmission lever 29 is provided on the left side of the steering handle 5, and a throttle lever 30 is provided on the right side. In addition, a stop lever 31 for stopping the driving of the aircraft and driving of the seedling planting unit 7 is provided on the left side of the operation box 4, and a planting capable of moving the seedling planting unit 7 up and down and driving on and off is provided on the right side. Attaching / elevating lever 32 (FIG. 2) is provided.

  A main clutch pedal 33 (FIG. 2) is provided at a position on the left side of the front of the machine body 1. The operation of the main body and the driving of the seedling planting unit 7 are stopped by the depression operation of the main clutch pedal 33. Further, a brake operating tool (hereinafter referred to as a brake pedal) 34 (FIG. 2) is provided at a position near the right side of the front portion of the body 1. The brake pedal 34 operates a four-wheel brake device (not shown) in the transmission case 17 via a connecting mechanism (not shown) by depressing the pedal 34 to brake the left and right front and rear wheels 2 and 3. It is composed. The main clutch pedal 33 may be omitted, and the main clutch may be disengaged at the same time when the brake pedal 34 is depressed.

  In the present embodiment, a fertilizer application device 40 is provided behind the driver's seat 8. The fertilizer application device 40 feeds the granular fertilizer stored in the fertilizer tank 41 by a certain amount by the powder feed unit 42,... Are guided to 44,... And dropped into a fertilization structure formed in the vicinity of the side portion of the seedling-growing strip by a grooved body 45,.

  Further, the driving force of the engine 9 is transmitted by a belt 14a via a pulley 47a disposed below the driver's seat 8 so that the blower 47 rotates, and the air generated by the blower 47 is transferred from the air chamber 48 which is long in the left-right direction to the chamber. It is blown into the fertilizer hose 43, ... via the hose 49, ..., and the fertilizer in the fertilizer hose 43, ... is forcibly conveyed by wind pressure.

The fertilizer hose 43 for transferring the fertilizer fed from the powder and granular material feeding part 42 is connected to the air chamber 48 (48a, 48b), but at both ends of the machine body width direction, which is a direction orthogonal to the traveling direction of the machine body 1. An air chamber 48a having a large internal volume is arranged, air from the blower 47 is sent to the air chamber 48a having a large volume, and a plurality of fertilizer hoses 43 are connected to the air chamber 48a in a concentrated manner. Then, an air chamber 48b having a relatively small volume and a semicircular cross section is connected to the middle of the air chamber 48a having a large volume at both end portions (see FIG. 3).
With the above configuration, the blowing pressure in the air chamber 48 can be maintained over the entire width direction of the machine body 1, and the fertilizer can be reliably transferred to the fertilization hose 43.
Further, the intermediate air chamber 48b having a small volume need only be supported by the air chamber 48a having a large volume on both sides, and a support member for the air chamber 48b is not required.

  Further, the air from the blower 47 enters the air chamber 48 through a duct. The air chamber 48 includes an enlarged side view of the air chamber portion in FIG. 3A and an arrow in FIG. As shown in FIG. 3B, which is an A view, the U-shape is viewed in the direction of arrow A in FIG. With this configuration, the air chamber 48 can be disposed so as not to interfere with the upper surface (rear step portion) 6a of the vehicle body cover, and the longitudinal length of the airframe can be reduced.

Further, as shown in FIG. 3A, the support frame 46 of the fertilizer feeding portion 42 guards the upper side of the air chamber 48, so that there is no possibility that a person gets on the air chamber 48 or a heavy object is placed and is not dented. .
In addition, the support frame 46 of the fertilizer feeding unit 42 is configured to bend toward the front side of the machine body 1, and the fertilizer feeding device 40 is moved forward (operator side) to bypass the rear side of the machine body and support the fertilizer feeding unit 42. ) Can be arranged.

  Further, as shown in the plan view of the main part in the vicinity of the fertilizer feeding portion in FIG. 4, the support frame 46 is in the U-shaped frame portion 53 of the step receiver 50, and supports both sides of the fertilizer application 40 with the left and right support frames 46. Since it is a structure, the fertilizer application apparatus 40 can be firmly supported with a simple frame structure using the frame on the vehicle body side.

  In addition, the seedling planting device 11 is operated by a cable 81 that is operated by the heel clutch lever 80 (FIG. 2). The cable 81 uses a transmission frame 82 for operating each seedling planting device 11 and the transmission frame. It is connected to a side transmission frame 83 for power transmission from 82 to the seedling planting device 11.

As shown in the schematic side view of the main part of the seedling planting section 7 in FIG. 5, the cable 81 is connected to the seedling mounting tank 10, the seedling feeding belt 84 (FIG. 1), and a lateral movement mechanism (not shown) of the seedling mounting tank 10. In order not to interfere with the movement trajectory F of the seedling planting tool 86 and the like, it is routed so as to pass below the transmission frame 82 and above the side transmission frame 83. For this reason, the maintainability of the cable 81 is also improved.
Further, the cable 81 is routed so that soil and water are hardly applied to the saddle clutch cable 81, and the durability of the cable 81 is also positively affected.

  Further, as shown in the side view of FIG. 6, in the configuration of the present embodiment, the lid 41 a of the fertilizer tank 41 is lowered when the seedling planting portion 7 is lowered (FIG. 6 (a )) And the ascending position (FIG. 6B) so that the lid 41a can be opened and closed and overlaps with the seedling tank 10 in the vertical direction. It is shortened.

  As shown in the left side view of the machine body in FIG. 7 and the front view of FIG. 8, the operation box 4 has a back lift mechanism for raising the seedling planting portion 7 when the machine body 1 is retracted, and seedling planting when turning. By making the auto lift mechanism for raising the part 7 and the on / off mechanism of the seedling planting part 7 for operating the seedling planting part 7, these members can be configured compactly.

  The back lift arm 62 for operating the back lift mechanism and the auto lift of the auto lift mechanism are moved to the shaft 61c of the swing roller 61b at a position shifted from the rotation shaft 61a of the on / off planting arm 61 of the seedling planting section 7. By attaching the rotation shaft of the arm 63, the rotation shafts of the backlift arm 62 and the autolift arm 63 can be installed on the rotation shaft 61c of the roller 61b, so that these configurations can be made more compact than before.

  Further, in the above-described backlift / autolift mechanism, with the three points of the backlift arm 62 and the autolift arm 63 set on the rotating shaft 61c of the roller 61b of the planting arm 61, as shown in FIG. The rotation shaft 32a of the planting lift lever 32 is also the rotation center of a fan-shaped planting cam 86 provided integrally with the planting lift lever 32, and the roller 61b of the planting arm 61 is fan-shaped planting. The cam 86 is configured to be engaged with any one of a plurality of recesses provided at the tip of the cam 86. The planting cam 86 is elastically supported by the body with a spring 88.

  Whenever the roller 61b is locked in the respective recesses of the planting cam 86 with the above configuration, for example, seedling planting, seedling planting cutting (seed planting section 7 lowers seedling planting), neutrality, rising The operating state of the seedling planting unit 7 can be changed in the order of.

  When the roller 61b is retracted downward (the roller 61b is disengaged from the recess provided at the tip of the planting cam 86), the planting lift lever 32 is automatically operated to the raised position by the biasing force of the spring 88, and the seedling The planting part 7 rises.

  Further, as shown in FIG. 7, when the auto lift lever 63a is turned off, the allowance from the wall surface of the operation box 4 at the solid line position is small, so that the auto lift lever 63a can be prevented from entering the “ON” position due to an erroneous operation. The backlift arm 62 is operated by the main transmission lever 29.

  FIG. 10 shows a right side view of the body of the brake pedal 34 installation portion. In the vicinity of the brake pedal 34, a manual stop operation lever 65 that can be operated after being lowered from the rice transplanter is disposed. Further, the manual stop operation lever 65 can be operated to depress the brake pedal 34. A release lever 66 that enables the manual stop operation lever 65 to be released while holding the manual stop operation lever 65 is provided.

  When the brake pedal 34 at the dotted line position shown in FIG. 10 is depressed in the direction of arrow A1 and moved to the solid line position, the manual stop operation lever 65 connected to the brake pedal 34 via the rod 67 is also moved from the dotted line position to the arrow A2. Move to the solid line position. At that time, a recess 69b provided on the back side of the cam portion 69a of the lock pedal 69 rotatably provided on the side surface of the brake pedal 34 is engaged with the projection 1a of the machine body 1 to brake the brake pedal 34. Hold in working condition.

  The release lever 66 having the rotation shaft 66b is provided in the vicinity of the grip portion 65a of the manual stop operation lever 65 of the present embodiment. Further, since the spring 66c is provided on the rotation shaft of the release lever 66, the release lever 66 constantly biases the lock pedal 69 to a position where the lock pedal 69 is not rotated by the spring 66c. However, when the release lever 66 is pushed to the position of the alternate long and short dash line in the direction of arrow B1, the tip of the release lever 66 comes into contact with the side surface of the cam portion 69a of the lock pedal 69 so The brake operating state by the lock pedal 69 can be released by moving to the chain line position.

  Compared with the prior art in which the brake pedal 34 and the manual stop operation lever 65 are connected by a wire instead of the rod 67, the handle 5 is held by the right hand and the manual stop operation lever 65 is held by the left hand, for example, by the configuration shown in FIG. Since the brake can be released by operating the release lever 66 between the lever 65 and the operation box 4, the stability and safety at the time of restart can be improved after the machine is stopped as compared with the prior art. The locked brake can be released by stepping on the lock pedal 69 with a foot, and the locked brake can be released even if the release lever 66 is operated by hand.

  10 is a right side view of the brake pedal portion of FIG. 11 (FIG. 11A), showing another embodiment of the linkage mechanism using the brake pedal 34 with the lock pedal 69 and the rod 67 of the manual stop operation lever 65 shown in FIG. It is shown in the front view (FIG. 11 (b)).

11, the brake pedal 34 and the manual stop operation lever 65 are linked by a rod 67, and when the brake pedal 34 is depressed, the manual stop operation lever 65 is moved from the brake pedal 34 to the rod by the rod 67. In conjunction with 67, the position moves from the dotted line position in FIG. At this time, the brake pedal 34 and the rod 67 naturally move from the dotted line position to the solid line position. At that time, a recess 69b provided on the back side of the cam portion 69a of the lock pedal 69 rotatably provided on the side surface of the brake pedal 34 is engaged with the projection 1a of the machine body 1 to brake the brake pedal 34. Hold in working condition.
Further, although the rod 67 is locked to the rotation shaft 65c in the middle portion of the manual stop operation lever 65, the rotation shaft 65c is also the rotation center of the L-shaped release lever 66.

Further, the wire 54 having one end attached to the L-shaped bent portion of the release lever 66 is supported by a support portion 65d provided on the manual stop operation lever 65, and the other end of the wire 54 is provided on the brake pedal 34. The lock pedal 69 is attached to the support portion 34a.
When the release lever 66 is directed toward the manual stop operation lever 65 and the operator firmly holds the wire, the wire moves the lock pedal 69 in the direction of arrow B about the rotation shaft 69c according to the swinging of the release lever 66, and the brake by the lock pedal 69 is applied. The operating state can be released.

Further, the manual stop operation lever 65 is L-shaped as shown in FIGS. 11A and 11B, and is provided at a position that does not overlap the irradiation area of the headlamp 51 on the front surface of the operation box 4. The lever 65 is not shaded even when 51 is lit.
Further, since the center mascot 52 is not shaded even when the headlamp 51 is turned on, safety can be improved.

  By the way, in addition to the levers 63a and 65, on the left and right sides of the operation box 4, as shown in FIG. 12 (FIG. 12 (a) is a plan view and FIG. 12 (b) is a partially sectional front view), And a planting / elevating lever 32 for planting operation of the seedling planting portion. A meter panel 72 is provided on the upper surface of the operation box 4. When the meter panel 72 is assembled with the lever guides 73 and 74 of the levers 29 and 32 on both sides being attached to the meter panel 72, the lever is mounted on the meter panel 72. Groove portions 72a and 72b are also formed in the inner direction of the portions overlapping the groove portions 73a and 74a of the guides 73 and 74. When it is necessary to assemble or remove the meter panel 72 in this way, the two levers 29 and 32 are folded inward to cover the meter panel 72 and then cover the lever guides 73 and 74. Thus, when the meter panel 72 is assembled and removed, the two levers 29 and 32 are both pivoted inward to facilitate maintenance.

  The work vehicle of the present invention can be used as a compact seedling transplanter such as a riding rice transplanter.

1 is an overall side view of a passenger rice transplanter according to an embodiment of the present invention. It is a whole top view of the riding rice transplanter of FIG. FIG. 3 is an enlarged side view (FIG. 3A) near the fertilizer application of the riding rice transplanter in FIG. 1 and a view of the air chamber as viewed from the direction of arrow A in FIG. 3A (FIG. 3B). It is a principal part top view of the fertilization tank installation part of the riding rice transplanter of FIG. It is a principal part side view of the seedling planting part of the riding rice transplanter of FIG. It is a side view which shows the positional relationship of the fertilizer application of the riding rice transplanter of FIG. 1, and a seedling mounting tank. FIG. 2 is a left side view of a body of an operation box portion of the riding rice transplanter of FIG. 1. It is a body front view of the operation box part of the riding rice transplanter of FIG. It is a figure explaining the lift mechanism of the seedling planting part by the planting and raising / lowering lever of the riding rice transplanter of FIG. FIG. 2 is a right side view of a body of a brake pedal installation portion of the riding rice transplanter of FIG. 1. It is the right view (FIG. 11 (a)) and the front view (FIG. 11 (b)) of the other Example of the brake pedal installation part of the riding rice transplanter of FIG. They are a top view (Drawing 12 (a)) and a partial section front view (Drawing 12 (b)) of the operation box part of the riding rice transplanter of Drawing 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airframe 1a Protrusion part 2 Front wheel 3 Rear wheel 4 Operation box 5 Steering handle 6 Step 7 Seedling planting part 8 Driver's seat 9 Engine 10 Seedling tank 11 Planting device 12 Float 13 Engine output pulleys 14a and 14b Transmission belt 15 Mission input Pulley 17 Transmission case 19 Left and right front wheel drive case 20 Front wheel axle 21 Rear wheel transmission shaft 22 Rear wheel transmission case 23 Rear wheel axle 24 Hydraulic lifting cylinder 25 Lifting link mechanism 26 Planting transmission shaft 27 Steering shaft 29 Main transmission lever 30 Throttle lever 31 Stop lever 32 Planting / elevating lever 33 Main clutch pedal 34 Brake pedal 34a Support section 40 Fertilizer 41 Fertilizer tank 42 Feeding section 43 Fertilization hose 44 Fertilization guide 45 Groove body 46 Support frame 47 Blower 47a Pulley 48 Air chain Bar 48a Large volume air chamber 48b Small volume air chamber 49 Chamber hose 50 Step receiver 53 U-shaped frame 51 Headlamp 52 Center mascot 54 Wire 61 Planting arm 61a Planting arm rotation shaft 61b Oscillating roller 61c Oscillating roller Shaft 62 Back lift arm 63 Auto lift arm 63a Auto lift lever 65 Manual stop operation lever 65a Grip portion 65c Rotating shaft 65d Supporting portion 66 Release lever 66b Release lever rotating shaft 66c Spring 67 Rod 69 Lock pedal 69a Lock pedal cam portion 69b Recess 69c Lock pedal rotation shaft 72 Meter panel 73, 74 Lever guide 72a, 72b, 73a, 74a Groove 80 畦 Clutch lever 81 畦 Clutch cable 82 Transmission frame 83 Side transmission frame 4 seedlings feed belt 86 with a seedling planting device F planting locus

Claims (1)

A prime mover (9), a traveling machine body (1) that travels with the power from the prime mover (9), a working device (7) that can be moved up and down on the rear side of the traveling machine body (1), and a traveling machine body (1 ) And a powder storage tank (41) provided on the front side of the working device (7), a powder supply part (42) provided in the lower part of the storage tank (41), and the powder An air chamber (48) for temporarily storing the pressure air for transferring the granular material fed by the granule feeding part (42), and a blower (47) for supplying the pressure air to the air chamber (48) And a transfer pipe (43) connected to the air chamber (48) for transferring the powder fed by the powder feed unit (42) from the air chamber (48) to the powder discharge unit (44). Provided,
The air chamber (48) is arranged over both ends in the width direction orthogonal to the traveling direction of the traveling machine body (1), and a plurality of transfer pipes (43) are connected to the air chambers (48) on both sides. A work vehicle characterized in that a cross-sectional area of the intermediate portion in the lateral width direction of the air chamber (48) to which the transfer pipe (43) is not connected is made smaller than both end portions.

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