JPH08238005A - Attaching and detaching device for working machine in paddy field working vehicle - Google Patents

Abstract

PURPOSE: To provide an attaching and detaching device for a working machine in a paddy-field working vehicle easy in the linkage of a hitch, capable of properly performing seedling-planting, and disinfection and blight-controlling of crops grown between ridges, and enabling the large improvement of usability of a paddy-field working vehicle by placing a chemical tank in a blight- controlling machine close to the main machine body. CONSTITUTION: This attaching and detaching device in a paddy-field working vehicle has the following structure. A working machine is attached on the rear part of a four-wheeled main machine 1 having front wheels 2 and rear wheels 3 through a parallel link 7 consisting of a top link 5 and a lower link 6 in a vertically movable manner. A planting member and a blight-controlling machine S provided with a chemical tank 20 are alternatively attached on a hitch H placed on the rear end of the parallel link 7 in an attaching and detaching manner. The chemical tank 20 of the blight-controlling machine S is placed close to the main machine 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selectively attaches a planting part and a control machine to the main body of a paddy field work vehicle such as a riding rice transplanter or a submerged direct soil seeder, and detachably mounts the seedlings appropriately. The present invention relates to a work machine attachment / detachment device for a paddy field vehicle, which is capable of performing attachment work and disinfection / control of ridge crops.

[0002]

2. Description of the Related Art A tractor-pulling type control machine and a dedicated control machine are known as self-propelled control machines, but a control system using this machine of a paddy field work vehicle such as a riding rice transplanter or a submerged direct soil seeder. Is not provided.

[0003]

In a conventional paddy field vehicle such as a passenger rice transplanter, a planting part and the like are detachably and vertically mounted on a traveling machine body (this machine) through parallel links. Since it is a paddy field dedicated machine such as rice planting, it is an expensive machine but the operating period of the year is very short only at the rice planting (seeding) time, This is one of the reasons why it is difficult to reduce the production cost. However, there is a problem in terms of the field force and strength of the parallel links when the crop control work is performed by connecting a control machine having a heavy chemical tank to the main body of a paddy field work vehicle such as a passenger rice transplanter.

[0004]

Therefore, the present invention has solved the above problems by being configured as follows. That is, in a paddy work vehicle in which a working machine is vertically mounted via a parallel link to the rear part of a four-wheel type machine having front wheels and rear wheels, a hitch part provided at the rear end of the parallel link is planted. This is a working machine attaching / detaching device in a paddy work vehicle in which a control machine having a section and a chemical tank is selectively removably mounted, and the chemical tank of the control machine is arranged close to the machine side.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a four-wheel type paddy field vehicle (a rice transplanter in the illustrated example) having front wheels 2 and rear wheels 3 and an engine 4 mounted at the front portion, and from the top link 5 and the lower link 6 at the rear portion thereof. The planting part M (see FIG. 3) is detachably attached through the parallel link 7 which is kept horizontal by the rotation of the hydraulic lift arm (not shown) connected to the lower link 6. It can move up and down in the state of. R is a hydraulic operation lever, and one lever R can simultaneously control both the hydraulic valve and the PTO clutch. Reference numeral 8 denotes a machine-side hitch provided on the free end side of the parallel link 7 (planting portion M connection side), and a work-machine side hitch 9 is detachably connected to the machine-side hitch 8. The structures of the main unit side hitch 8 and the working unit side hitch 9 are illustrated in FIGS. 4 and 5. That is, the hitch 8 on the machine side is the connecting pin 10,1 penetrating the upper and lower pin insertion holes 8a, 8b.
It is connected to the free end side of the top link 5 and the lower link 6 via 1, and has a U-shape in a plan view. On the rear side, there is a gutter-shaped pin seat 8C located at the upper corner. It is integrally fixed and a lateral pin fitting groove 8d is formed at a midpoint in the longitudinal direction.

Further, a pin insertion groove 8d is provided in the hitch 8 on the machine side.
Is provided in the vicinity of the pivot pin 12 for pivoting up and down, and a hook 13 for locking is provided.
It can be operated from the driver's seat via 14 at hand. On the other hand, the work machine side hitch 9 is wider than the machine side hitch 8 and has a U-shape that is open on the front side like the machine side hitch 8 and the pins 15 and 16 are laid vertically. The hitch portion H can be attached and detached by one-touch operation. Further, the control machine S is integrally connected to the work machine side hitch 9. That is, on the back side of the working machine side hitch 9, a power sprayer 17 which is linked to the main body side PTO shaft through a drive shaft 17a is fixed in the machine frame 18, and above the power sprayer 17 is located above the power sprayer 17. The frame body 19 is integrally fixed to the work machine side hitch 9 and the machine frame 18 with the front half of the frame body facing the parallel link 7,
A medicine tank 20 with an agitator 20a is arranged in the frame body 19 so as to be close to the machine side, and is detachably fixed by a tightening band 21. 22 is an auxiliary step foldably attached to the front end portion of the frame body 19, 23 is a suction pipe, 24 is a discharge pipe, and the discharge pipe 24 is connected to a jet pipe 26 described later through the agitator 20a and the pipe 25. There is.

Incidentally, although not shown in the figure, the agitator 20a has a built-in impeller and a flow-dividing valve that rotate by the discharge pressure of the drug, and the rotation of the impeller forcibly rotates the stirring impeller shaft penetrated into the tank 20. , The chemical in the tank is agitated. For this reason, the discharge pressure (discharge amount) of the power sprayer 17 is set to a high value in advance, and the surplus drug is circulated into the tank 20 via the return pipe 27. Reference numeral 28 denotes a boss fixed to the rear portion of the frame body 19. A round rod-shaped stay 29 with a predetermined interval is provided on the boss 28 so that the stay 29 is rotatable and both wings are foldably inserted. The lever 29 provided on one side of the driver's seat a is operated to connect the stay 29 via the wire 31.
The arm 29a, which is integral with, is pulled to rotate the injection pipe 26 upward. If the jet pipe 26 hits an obstacle, etc.
To prevent deformation, the base end side is configured to be bendable via a flexible tube 26a such as a rubber hose, and the outside is a coil spring.
The winding injection pipe 26 is held in a straight tube shape by 26b. 32 is a hose and 33 is a nozzle.

The front wheels 2 and the rear wheels 3 are provided with stays 34a and 35a.
The weed guides 34 and 35 are provided via a to prevent the crops from being caught by the wheels. 7 and 8, a V-shaped guide plate 37 in a plan view is provided in front of the front wheel 2 via a stay 36.

The one shown in FIGS. 9 and 10 is a medicine tank 20.
Is configured to be switchable between a position covering the upper side of the hitch portion H and a position retracted from the vicinity of the hitch portion H. That is, FIG. 9 shows a structure in which the tank 20 is slid forward and backward and a pair of left and right rails are provided on the working machine side hitch 9 and the machine frame 18 in the longitudinal direction.
38 is fixed, and the frame 19 'and the tank 20 are mounted on the rail 38 so as to be slidable in the front-rear direction. When the control machine is attached to or detached from the main body 1, the tank 20 is rearward along the rail 38 as shown by phantom lines. When the pest control work is performed, the tank 20 is returned to the position shown by the solid line near the machine 1 at the time of pest control work, and the frame body 19 'is railed by the stopper 39.
It is fixed on 38. In the figure, 18 'is a stand fixed to the machine frame 18.

Further, FIG. 10 shows a structure in which the tank 20 is rotatable, and the tank 20 is pivoted to the machine frame 18 with a support shaft 40 at the rear end of the frame body 19'a. It is designed so that it can be laid down. Although not shown in the drawing, a locking device including a pin or a hook is attached to hold the set position shown by the solid line.

In the above construction, when planting seedlings, as shown in FIG. 3, the normal planting work is carried out with the planting section M attached to the main unit 1 side of the riding rice planter. be able to. When disinfecting / controlling the crop b, the planting section M is removed from the main unit 1 side of the riding rice transplanter, and the control unit S is connected. At this time, with the parallel link 7 lowered, the main body 1 is in contact with the extermination machine S (the injection pipe 26 is raised).
The upper pin 15 of the work machine side hitch 9 on the pin seat 8c of the machine side hitch 8 and press the hydraulic pressure / PT in that state.
When the O-clutch lever R is operated to raise the parallel link 7, the working machine side hitch 9 pivots downwards about the upper pin 9 due to the weight of the pest control machine S, and the lower pin 16 of the working machine side hitch 9 is rotated. Will be inserted into the pin insertion groove 8d of the machine side hitch 8, so that the hook 13 is manually operated to lock the machine side hitch 8 and the working machine side hitch 9. Then, the pest control machine S is fixed to the required spray height by a lever operation (hydraulic fixation), the chemical to be sprayed is put in the tank 20, and then the injection pipe 26 is rotated and set according to the ridge of the crop b. If the PTO clutch is inserted and the machine 1 is run, the medicine in the tank 20 is sprayed through the suction pipe 23, the power sprayer 17, the discharge pipe 24, the stirrer 20a, and the pipe 25 in order.
It is sprayed on the crop b from 26 nozzles 33. The circulation at the end of the line is carried out by rotating the injection pipe 26 in the horizontal state shown by the phantom line in FIG.

By the way, the pest control device of the present invention uses the main unit 1 such as a riding rice transplanter having a relatively small weight as a traveling body, a high height from the ground contact surface, and a narrow wheel (tire) width. Therefore, even when working with narrow ridges that are difficult to enter with a tractor, etc., it is possible to carry on and control the ridges and vegetables lightly without ruining. Moreover, since the chemical tank 20 of the extermination machine S is arranged close to the machine 1 side, the center of gravity of the tank is close to the machine 1 side, and the front-rear balance of the machine body during work is improved and stable pest control work is performed. Can be done. In addition, the tank capacity can be set large while solving the problems such as the strength of the parallel link 7 and the lack of field force, and the number of times of supplying the medicine to the tank 20 can be reduced correspondingly and the workability can be improved.

When the medicine tank 20 is configured to be switchable between a position that covers the upper side of the hitch portion H and a position that is retracted from the vicinity of the hitch portion H, the tank 20 is hitch when the disinfecting machine S is attached to or detached from the machine 1. By retracting from the vicinity of the portion H, the hitch portion H can be easily visually recognized from the position of the driver's seat a, so that the attachment / detachment work can be performed quickly and accurately.

[0014]

As described above, the present invention provides a paddy work vehicle in which a working machine is detachably attached to a rear portion of a four-wheel type machine having front wheels and rear wheels via parallel links. The hitch provided at the rear end of the plant is equipped with a pest control unit and a chemical control tank, which is selectively removable, and the chemical control tank of the control device is placed close to the machine. It is possible to significantly increase the utilization rate of paddy field work vehicles without making any special improvements to the existing paddy field work vehicle machines, and to effectively utilize the functions and characteristics of paddy field work vehicles for the production of ridge crops. Since disinfection and control can be performed, the work can be easily performed even in a field such as a vegetable field where ridges are narrow and tractors cannot enter. Moreover, since the chemical tank of the pest control machine is placed close to the machine side, the center of gravity of the tank is close to the machine side, and the tank capacity is set large while solving the problems of parallel link strength and field force. Therefore, the number of times of supplying the medicine to the tank can be reduced, the working efficiency can be improved, and the front-rear balance of the machine body can be well maintained. Further, when the medicine tank is configured to be switchable between a position that covers the upper portion of the hitch portion and a position that is retracted from the vicinity of the hitch portion, the work of connecting the hitch portion can be easily performed.

[Brief description of drawings]

FIG. 1 is an overall side view of a riding rice transplanter in which a pest control machine is connected to the main machine.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of a riding rice transplanter.

FIG. 4 is a perspective view showing structures of a main unit side hitch and a working unit side hitch.

FIG. 5 is a cross-sectional view showing a connected state of a main unit side hitch and a working unit side hitch.

FIG. 6 is a plan view of the machine.

FIG. 7 is a side view showing a state in which a pest controller is connected to the main body provided with a weed plate.

FIG. 8 is a plan view of the same unit as the above.

FIG. 9 is a side view of an example in which the medicine tank is configured to slide forward and backward and can be switched between a position that covers the upper portion of the hitch portion and a position that is retracted from the vicinity of the hitch portion.

FIG. 10 is a side view in which the medicine tank is configured to be rotatable so as to be switchable between a position that covers the upper portion of the hitch portion and a position that is retracted from the vicinity of the hitch portion.

[Explanation of symbols]

 1 Paddy field vehicle main machine 7 Parallel link 8 Machine side hitch 9 Working machine side hitch 17 Power sprayer 20 Chemical tank H Hitch part M Planting part S Control

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[Procedure amendment]

[Submission date] March 11, 1996

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

Claims (1)

[Claims] 1. A paddy work vehicle comprising a four-wheel type rear body having a front wheel and a rear wheel, the work machine being vertically movable via a parallel link, and a hitch portion provided at a rear end of the parallel link. A pest control machine having a planting section and a chemical tank is selectively attached detachably, and the chemical tank of the pest control machine is arranged close to the machine side. apparatus.