JP4627223B2 - Liquid spraying device - Google Patents

Description

  The present invention relates to a liquid spraying device for mounting a liquid sprayer on the rear part of a tractor via a three-point link mechanism and spraying a liquid such as a liquid herbicide on a farm field while traveling.

Conventionally, as a liquid spreader for spraying liquid on a farm field, a tank for storing liquid, a spray nozzle for spraying liquid in the tank to the field, and a pump for feeding the liquid in the tank to the spray nozzle, There is a backpack type liquid spreader (see Patent Document 1).
Japanese Patent Laid-Open No. 9-220501

In the case of a backpack-type liquid spreader, an operator carries a liquid spreader equipped with a tank, a pump, etc., and walks and spreads one by one. Therefore, there is a problem that the spraying work is heavy labor.
Therefore, it is considered to reduce the spraying work by mounting the liquid spreader on the rear part of the tractor via a three-point link mechanism.
When this liquid spreader is mounted on the rear part of the tractor, the tank and pump of the liquid spreader are relatively heavy, so that there is a problem that the weight balance becomes unbalanced unless they are mounted as close to the tractor as possible.

  In view of the above problems, the present invention provides a liquid spreader including a tank for storing liquid and a pump for sending the liquid in the tank to a spray nozzle via a three-point link mechanism at the rear of the tractor. It is an object of the present invention to provide a liquid spraying device that can be mounted with a tank and a pump close to a tractor.

The technical means taken by the present invention to solve the technical problem includes a mounting frame mounted on the rear part of the tractor via a three-point link mechanism, a tank for storing the liquid, and the liquid in the tank. A pump for feeding to the spray nozzle, and the mounting frame includes a main frame arranged along the front-rear direction and a mast erected on the front end side of the main frame, and a tank is provided on the main frame. The top link of the three-point link mechanism passes through the top link and the work machine side connection part of the top link and is downward from the work machine side connection part. A front-rear direction straight line that passes through the top link and the tractor side connection part of the top link and extends rearward from the work machine side connection part with respect to an angle formed by the extending vertical line. The working machine side connecting part is connected to the mast with the angle of the rear being larger, and the work machine side mounting part of the lower link of the three-point link mechanism is located below the middle part of the main frame in the front-rear direction Connected to the lower link attachment part ,
The spray nozzle is arranged behind the lower part of the rear wheel of the tractor and in front of the lower link mounting part .

Also includes a stand to support said mounting frame upon removal of the instrumentation wearing frame from three-point link mechanism, it is preferable to detachably this stand relative to the mounting frame.
In addition, a switching lever for switching between a state in which the liquid sent by the pump is sent to the spray nozzle and a state in which the liquid is returned to the tank may be provided at a position where the mast can be operated from the driver seat of the tractor.

  According to the present invention, when a liquid spreader including a tank for storing liquid and a pump for sending the liquid in the tank to the spray nozzle is mounted to the rear portion of the tractor via the three-point link mechanism, the tank and the pump Can be mounted close to the tractor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 5, reference numeral 1 denotes a herbicide spreader 1 exemplified as a liquid spreader, which includes a mounting frame 4 mounted on the rear part of a tractor body via a three-point link mechanism 3, and a liquid herbicide. The storage tank 5, the spray nozzle 6 for spraying the herbicide in the tank 5 to the field, the pump 7 for pumping the herbicide in the tank 5 to the spray nozzle 6, and the mounting frame 4 are detachably attached. And a stand 8 that supports the mounting frame 4 and the like when the mounting frame 4 is detached from the three-point link mechanism 3.

As the tractor to which the herbicide spreader 1 is attached, for example, a two-shaft, four-wheel high clearance tractor is employed.
The three-point link mechanism 3 includes a top link 9 with an adjustable length at the upper part and a pair of lower left and right lower links 10. A tractor side connecting part (front end side connecting part) 9 a of the top link 9 is A tractor side mounting portion (front end side mounting portion) 10a of the lower link 10 is pivotally connected to a top link mounting base 12 mounted at the center in the left and right direction of the upper rear portion of the transmission case 11 constituting the rear portion of the tractor body. The transmission case 11 is pivotally connected to a mounting portion 52 provided on the side portion of the rear end side lower portion.

In the present embodiment, the top link mounting base 12 protrudes relatively rearward, so that the top link 9 of the standard three-point link mechanism 3 and the top link of the special three-point link mechanism can be attached. In the illustrated example, a standard three-point link mechanism 3 is employed.
At the upper part of the transmission case 11, there is provided a hydraulic device 13 for raising and lowering the working machine attached to the rear portion of the tractor via the three-point link mechanism 3, and this hydraulic device 13 rotates about the axis in the left-right direction. A pair of left and right lift arms 14 are provided, and the distal ends of the left and right lift arms 14 are connected to the middle portion of the lower link 10 on the same side in the left and right direction via a lift rod 15 to swing the lift arms 14 up and down. Thus, the herbicide spreader 1 is configured to move up and down.

A PTO shaft 16 that is rotationally driven by the power from the engine of the tractor is provided in a rearward projecting manner on the lower side of the top link mount 12 on the rear surface of the mission case 11.
The mounting frame 4 is mainly configured by connecting frame materials such as a rectangular tube shape, an L-shaped cross section, and a U-shaped cross section, and the mounting frame 4 is a main frame 17 disposed along the front-rear direction. And a mast 18 erected on the front end side of the main frame 17, a lower frame 19 disposed below the main frame 17 at an interval, and a longitudinal longitudinal direction connecting the main frame 17 and the lower frame 19. Mainly composed of frames 20 and 21.

The main frame 17 includes a pair of left and right main frame members 22 arranged along the front-rear direction and spaced in the left-right direction, and the other main frame member 22 from the upper surface on the front end side of the one main frame member 22. A front connection frame member 23 that is arranged in the left-right direction across the upper surface on the front end side and connects the left and right main frame members 22, and a left-right main frame member 22 that is arranged in the middle in the front-rear direction between the left and right main frame members 22. And an intermediate connecting frame member 24 to be connected.
The mast 18 is disposed on the center side in the left-right direction of the front connection frame member 23 of the main frame 17, and a pair of left and right vertical frame members 25 disposed along the vertical direction, and the upper ends of the left and right vertical frame members 25. And a connecting plate 26 for connecting the two.

The lower frame 19 is disposed between the left and right side frame members 27 and a pair of left and right side frame members 27 that are disposed along the front-rear direction and spaced apart from the left and right main frame members 22 of the main frame 17. It has an intermediate connection frame member 28 that is disposed in the middle part in the front-rear direction and connects the left and right side frame members 27 together.
The front part of the left and right main frame member 22 of the main frame 17 protrudes forward from the left and right side frame members 27 of the lower frame 19, and the front vertical frame 20 is a midway part in the front-rear direction of the main frame member 22 of the main frame 17. The rear frame 21 connects the main frame member 22 of the main frame 17 and the rear part of the side frame member 27 of the lower frame 19 to each other.

The tank 5 is placed on the main frame 17 (on the left and right main frame member 22) of the mounting frame 4, and the tank 5 is fixed to the main frame 17 by a pair of left and right bands (not shown).
The band is provided so as to extend from the front surface side of the tank 5 to the back surface side through the upper surface side, one end is locked to the left and right end portions of the front connection frame member 23 of the main frame 17, and the other end side is the main frame 17. The main frame member 22 is locked by a locking piece 29 provided at the rear end portion.
The pump 7 is disposed on the lower side of the main frame 17 and the tank 5 and is fixedly attached to the intermediate connecting frame member 28 of the lower frame 19. The input shaft 7 a of the pump 7 is provided to project forward. The PTO shaft 16 is interlocked and connected via a universal joint, and the pump 7 is driven by the rotational power from the PTO shaft 16.

  The top link 9 and the top link 9 are more than an angle X formed by the top link 9 and a straight line A in the vertical direction passing through the work machine side connecting portion (rear end side connecting portion) 9b of the top link 9. The angle Y formed by the straight line B in the front-rear direction passing through the tractor-side connecting portion 9a is set to a rearward inclined posture (inclination that moves upward as it goes rearward). The work implement side connecting portion 9b is inserted into the upper part between the left and right vertical frame members 25 of the mast 18, and the work implement side connecting portion 9b is pivotally connected to the left and right vertical frame members 25 by a pivot 30 in the left and right direction. Yes.

A mounting plate 31 is fixed to the left and right outer surfaces of the front end side of the left and right side frame members 27 of the lower frame 19 so as to protrude upward and downward from the side frame members 27. On the side, a lower link mounting portion 32 made of a pin or the like fixed as a protruding shape outward in the left-right direction is provided.
A work machine side mounting portion (rear end side mounting portion) 10 b of the lower link 10 is connected to the lower link mounting portion 32.
The top link 9 is inclined rearward with a relatively large angle Y with respect to the straight line B in the front-rear direction passing through the tractor side connecting portion 9a and connected to the mast 18 of the mounting frame 4, and the lower link 10 is connected to the main frame 17 Since the tank 5 is mounted on the main frame 17 and the pump 7 is disposed on the lower side of the main frame 17, the tank 5 is connected. And the pump 7 can be mounted close to the tractor.

By mounting the herbicide spreader 1 close to the tractor, the load applied to the front wheel of the tractor can be made appropriate even with the herbicide spreader 1 equipped with a 200-liter tank (front wheel weight). Balance can be secured properly) and stable work can be done.
A bracket 33 is attached and fixed to a middle part in the front-rear direction of the left side frame member 27 of the lower frame 19, and a filter 34 is attached and fixed to the bracket 33, and the suction side of the pump 7 is connected to the filter 34 with a connection hose. The filter 34 is connected to the bottom side of the tank 5 via a suction hose, and the herbicide in the tank 5 is sucked into the pump 7 via the filter 34 by driving the pump 7. Has been.

The discharge side of the pump 7 is connected to a liquid flow passage formed in a connection block 35 provided on the upper end side of the mast 18 via a delivery hose, and the discharge side of the pump 7 includes the pump 7 An air chamber 36 is provided for alleviating fluctuations in the hydraulic pressure of the herbicide that is discharged from and sent to the connection block 35.
A pressure gauge 37 is connected to the connection block 35 on the front side, a pressure regulating valve 38 is connected to the upper surface side, and a cock 39 is connected to the right side surface, and each is connected to a liquid flow passage formed inside the connection block 35. ing.

The cock 39 is connected to the spray nozzle 6 via a liquid supply hose, and the cock 39 is opened and closed by a swinging operation of the switching lever 40, and is pumped from the pump 7 by operating the switching lever 40. The state can be switched between a state in which the herbicide is fed to the spray nozzle 6 and a state in which the pressure-feeding of the herbicide to the spray nozzle 6 is interrupted.
When the cock 39 is closed and the feeding of the herbicide to the spray nozzle 6 is interrupted, the hydraulic pressure in the liquid flow passage in the connection block 35 rises, the pressure regulating valve 38 opens, and the herbicide sent from the pump 7 is returned to the return hose. Is returned to the tank 5 via.

The switching lever 40 of the cock 39 is provided on the front side of the cock 39 and is in a position where it can be operated from the driver's seat of the tractor. By installing the herbicide spreader 1 close to the tractor, the driver's seat of the tractor Can easily access the switching lever 40.
The spray nozzle 6 is disposed in the vicinity of the rear of the lower part of each of the left and right rear wheels 41 of the tractor and in front of the lower link mounting portion 32 with the mounting frame 4 mounted on the tractor. It is attached to the attached support 42.
The support body 42 is mounted on the upper part of the left and right mounting plates 31 so as to protrude outward in the left-right direction, and is fitted and fixed to the outer end side of the support arm 43 in the left-right direction so that the left-right position can be adjusted. A mounting plate 44, a support plate 45 attached to the mounting tube 44, and a mounting plate 46 attached to the support plate 45.

The support plate 45 has an upper wall 47 and a front wall 48 extending downward from the front end of the upper wall 47, and the upper wall 47 is adjustable in the front-rear position on the lower surface side of the mounting cylinder 44. The attachment plate 46 is attached to the front wall 48 so that the vertical position can be adjusted.
An attachment piece 49 formed by bending the attachment plate 46 rearward is provided on the lower end side of the attachment plate 46, and a joint member 50 is attached and fixed to the attachment piece 49. Is connected to the outlet side of the cock 39 via a liquid supply hose.
A liquid feed pipe 51 provided so as to protrude leftward and rightward is provided at the lower part of the joint member 50, and the discharge port of each of the left and right liquid feed pipes 51 faces downward. Thus, the spray nozzle 6 is connected, and the spray nozzle 6 sprays the herbicide into the groove between the front wheels and the rear wheels 41 of the tractor.

The position of the spray nozzle 6 can be adjusted left and right, front and rear, and up and down by adjusting the horizontal position of the mounting cylinder 44, adjusting the front and rear positions of the support plate 45, and adjusting the vertical position of the mounting plate 46.
As shown in phantom lines in FIG. 1, the spray nozzle 6 has a small starting angle D <b> 1 when it is disposed at a position behind the rear wheel 41 and away from the rear wheel 41. By arranging in the vicinity of the rear of the vehicle, a large starting angle D2 can be taken, and when the tractor gets over the step, the step can be easily overcome.
The stand 8 is provided in a pair of left and right sides, and is formed in a U-shape that is formed by bending a square tube member and opening frontward in a side view, and an upper portion is a side frame member 27 of the lower frame 19 formed from the square tube member. The insertion portion 8a is inserted from the rear into the side frame member 27 and fixed to the side frame member 27, and the lower portion is formed with a length extending from the front end side to the rear end side of the main frame member 22 of the main frame 17 and the spray nozzle. 6 is a grounding portion 8b located on the lower side.

The stand 8 is configured to be removed and lightened during work.
In the state where the herbicide spreader 1 is mounted on the tractor and the stand 8 is mounted at the position where the spraying operation is performed, the bottom surface of the grounding portion 8b of the stand 8 is slightly separated from the ground, and the herbicide spreader 1 is lowered. As a result, the grounding portion 8b of the stand 8 is grounded, and the stand 8 supports the mounting frame 4 and the like, so that the herbicide sprayer 1 can stand on its own.
In the above-described embodiment, the liquid spreader is not limited to the herbicide spreader 1, but liquid such as liquid insect repellent (chemical solution) or liquid fertilizer is stored in the tank 5, and the liquid is used for crops, straws, etc. It is also possible to use a spreader that spreads the material.

It is a side view which shows the state which mounted | wore the tractor with the liquid spreader. It is a side view which shows the state which mounted | wore the liquid spreader with the stand. It is a front view which shows the state which mounted | wore the liquid spreader with the stand. It is a top view which shows the state which mounted | wore the liquid spreader with the stand. It is a perspective view which shows the state which mounted | wore the liquid spreader with the stand.

Explanation of symbols

Reference Signs List 3 Three-point link mechanism 4 Mounting frame 5 Tank 6 Spray nozzle 7 Pump 8 Stand 9 Top link 9a Tractor side connecting part 9b Work machine side connecting part 10 Lower link 10b Work machine side attaching part 17 Main frame 18 Mast 32 Lower link attaching part 40 Switching lever 41 Rear wheel A Vertical straight line B Front / rear straight line X Angle between top link and vertical straight line Y Angle between top link and front / rear straight line

Claims (3)

A mounting frame (4) mounted on the rear part of the tractor via a three-point link mechanism (3), a tank (5) for storing liquid, and the liquid in the tank (5) are sent to the spray nozzle (6). A main frame (17) arranged along the front-rear direction, and a mast (18) erected on the front end side of the main frame (17). The tank (5) is placed on the main frame (17) and the pump (7) is disposed below the main frame (17), and the top link (3) of the three-point link mechanism (3) ( 9) is a vertical line (A) extending vertically through the top link (9) and the work machine side connection portion (9b) of the top link (9) and extending downward from the work machine side connection portion (9b). The top link (9) than the angle (X) formed by Back-tilt posture in which the angle (Y) formed by the front-rear straight line (B) passing through the tractor-side connecting portion (9a) of the top link and extending rearward from the work implement-side connecting portion (9b) is larger. The work machine side connecting part (9b) is connected to the mast (18), and the work machine side mounting part (10b) of the lower link (10) of the three-point link mechanism (3) is arranged before and after the main frame (17). It is connected to the lower link mounting part (32) arranged on the lower side in the middle of the direction ,
The liquid spraying device, wherein the spraying nozzle (6) is disposed at a lower rear side of the rear wheel (41) of the tractor and in front of the lower link attaching part (32) . A stand (8) for supporting the mounting frame (4) when the mounting frame (4) is detached from the three-point link mechanism (3) is provided, and the stand (8) is detachable from the mounting frame (4). The liquid spraying apparatus according to claim 1, wherein A switch lever for switching the state where the liquid sent by the pump (7) is sent to the spray nozzle (6) and the state where it is returned to the tank (5) at a position where the mast (18) can be operated from the driver seat of the tractor. 40) The liquid spraying apparatus according to claim 1 or 2 , wherein the liquid spraying apparatus is provided.

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