JP2540465Y2 - Liquid sprayer for rice transplanter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device provided in a rice transplanter for spraying a liquid onto a paddy field, and more particularly to a liquid spraying device for a rice transplanter capable of accurately adjusting the flow rate of the liquid. It is.

[0002]

2. Description of the Related Art Since a rice transplanter is expensive, it is desired to use the rice transplanter besides rice transplantation to increase the utilization efficiency. Also, spraying liquid fertilizer or herbicide at the same time as rice planting increases work efficiency.

Therefore, the microfilm disclosed in Japanese Utility Model Application No. 2-97234 and the drawings (Japanese Utility Model Application Laid-Open No. 4-55211) is equipped with a liquid sprayer on a rice transplanter, and the liquid transplanter is used by the rice transplanter in parallel with the rice transplanting operation. It discloses performing a spraying operation.
According to the embodiment of the liquid sprayer for a rice transplanter, the displacement is transmitted to the reciprocating member of the reciprocating pump via the link mechanism, and the swing arm and the link member in the displacement transmission path of the link mechanism. Is changed by changing the position of the thumb screw in the long hole of the swing arm, thereby changing the ratio of the displacement amount of the swing arm to the displacement amount of the link member. Of the reciprocating member changes the discharge flow rate of the reciprocating pump, that is, the flow rate of spraying the liquid agent from the nozzle.

[0004]

[Problem to be Solved by the Invention] Loosening the thumbscrew while connected to the link member and moving the thumbscrew to the desired position in the elongated hole requires a large operating force, and the hand becomes unstable.
Thumbscrews easily swing, reducing efficiency and accuracy.

An object of the present invention is to provide a liquid spraying apparatus for a rice transplanter which can efficiently and accurately adjust the flow rate of spraying the liquid.

[0006]

The present invention will be described with reference to the drawings corresponding to the embodiments. The rice transplanter (10), which is a premise of the present invention, has a planting claw (34) that is rotationally driven to plant a seedling in a paddy field (32). The liquid medicine spraying device (38) for rice transplanters of the present invention includes (a) a reciprocating pump (60) that sucks and discharges a liquid material (47) by increasing or decreasing the pump chamber volume due to the reciprocating motion of the reciprocating member (120); b) A nozzle (6) for spraying the liquid agent (47) pumped from the reciprocating pump (60) to the paddy field (32).
8) and (c) a link mechanism that converts the rotational motion of the planting claw (34) into a substantially linear reciprocating motion and transmits the reciprocating member (120).
(103). The link mechanism (103) comprises (c1) a reciprocating swing arm (78) and (c2) a swing arm.
The link (86) is connected to the link member (86) via the connecting device (82). The coupling device (82) includes (a) a rack (104) provided along the side surface of the swing arm (78),
(B) A pinion (112) that meshes with this rack (104),
(C) A swing arm (78) that supports the pinion (112) and is movably movable by rolling of the pinion (112) in the rack (104).
Fitting body (108) fitted to and connected to the link member (86)
And (d) a restraining member (115) that restrains the rotation of the pinion (112) so as to be releasable.

[0007]

When the restraining member (115) restrains the rotation of the pinion (112), the pinion (112) of the coupling device (82) controls the rolling of the swing arm (78) in the rack (104). Being stopped,
The position on the rack (104) is fixed. Coupling device
The fitting body (108) of (82) reciprocates with the reciprocating swing of the swing arm (78) with a swing stroke corresponding to the fixed position of the pinion (112). The link member (86) is connected to the fitting (108) at the end, and reciprocates in the longitudinal direction at a stroke corresponding to the swing stroke of the fitting (108). In this way, the link mechanism (103) includes the ratio between the swing stroke of the swing arm (78) and the displacement stroke of the link member (86) as an element of the overall link ratio, and the reciprocating motion of the reciprocating pump (60). The member (120) is driven, and the reciprocating member (120) is
The liquid material (47) is reciprocated at a stroke corresponding to the link ratio of (103), and discharges an amount of the liquid agent (47) corresponding to the stroke in the discharge cycle.

In order to change the flow rate of the liquid agent (47) from the nozzle (68), the rotation of the pinion (112) by the restraining member (115) is released, and the pinion (112) is moved by the swing arm (78). To the desired position on the rack (104). Then, the pinion (11
The rotation of 2) is restrained again to fix the position of the pinion (112) on the rack (104). This allows the swing arm (7
The position of the fitting (108) in (8) changes, and the swing arm (7
The swing stroke of the fitting (108) during the reciprocating swing of (8) changes, and the swing stroke of the swing arm (78) and the link member (8).
6) The ratio to the displacement stroke changes. As a result, the stroke when the reciprocating member (120) of the reciprocating pump (60) is driven by the transmission displacement from the link mechanism (103) changes, and the liquid discharged from the reciprocating pump (60) in the discharge cycle is changed.
The amount of the liquid (4) from the nozzle (68) also changed.
7) The spray flow rate changes.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 8 is a schematic side view of the rice transplanter 10 and the liquid spraying device 38 mounted thereon. The rice transplanter 10 includes a trolley 12 that travels in a paddy field 32, and a planting device 14 that is detachably and vertically movable attached to the rear of the trolley 12 via a link. In the carriage 12, the driver's seat 16 is
And a seat 20 facing the steering wheel 18, and a driver's seat
The driving power of the engine 168 (FIG. 9) is transmitted to the traveling clutch 172 (FIG. 9) and the transmission 2
The vehicle 12 is transmitted to the front wheels 24 and the rear wheels 26 via 2 to cause the truck 12 to travel. In the planting apparatus 14, the seedlings (not shown) are placed in a plurality of rows in the left and right direction on a seedling mounting table 28 which is inclined forward and upward, and the float 30 floats on the water surface of the paddy field 32, The planting device 14 is maintained at a height corresponding to the water surface of the paddy field 32. The planting claw 34 receives power from the transmission 22 of the bogie 12 via the PTO shaft 36, and transmits the seedling from the seedling mounting 28 in synchronization with the rotation of the engine 168, and thus the rotation of the front wheel 24 and the rear wheel 26. Grabbing the seedling and paddy rice field 32
We plant in. The solution spraying device 38 includes a frame 40 extending in the left-right horizontal direction and detachably attached to the rear of the planting device 14.
have.

FIGS. 1, 2 and 3 are a rear view, a right side view and a left side view of the liquid spraying device 38, respectively. Base plate 42
Is fixed to the upper surface of the frame 40 at the front end, the tank mounting base 44 is a box-shaped opening in the front-rear direction of the rice transplanter 10, and is fixed to the base plate 42 at the lower ends of the left and right side walls. The liquid material 47 is charged into the tank 46 through an upper input port opened and closed by a lid 48, and stores the liquid material 47. The liquid agent tank 46 is mounted on the upper surface of the tank mount 44, and includes a plate-shaped portion 50 that extends in the left-right direction of the rice transplanter 10 at the lower part of the left and right side walls. The L-shaped stay 52 is fixed to the upper surface of the tank mount 44 and is in contact with the plate-shaped portion 50. The bolt 54 is inserted through the plate-shaped portion 50 and the stay 52, is fitted with a spring washer 56, and is finally screwed with a nut 58, thereby fixing the plate-shaped portion 50 to the stay 52. The piston pump 60
It is placed on the base plate 42 and fixed to the base plate 42 via stays 62 at the lower front and rear ends. The suction line 64 connects the lower part of the liquid agent tank 46 to the suction port 146 of the piston pump 60, and the discharge line 66
Is connected to the discharge port 148 of the piston pump 60,
And a nozzle 68 is mounted at the front end.

The double arm lever 70 is rotatably supported by a stay 72 fixed to the frame 40 via a pin 74, and an arm portion 76 projecting horizontally from the pin 74 and projecting upward from the pin 74. And an arm portion 78. The grip 80
It is fitted and fixed to the upper end of the arm portion 78 and is gripped by an operator. The coupling device 82 is attached to the arm portion 78 of the double arm lever 70, and the vertical link 84 is rotatably connected to the arm portion 76 of the double arm lever 70 at the upper end via a universal joint 85. The horizontal link 86 extends substantially horizontally in the left-right direction, and is rotatably connected to upper ends of the connecting device 82 and the pump lever 92 via pins 88 and 90, respectively.

FIG. 4 shows a connection structure between the planting claw 34 and the vertical link 84. 1 and 4, the auxiliary crank
94 is rotatable around a rotation center 95. Each planted nail 34
Are disposed at both ends of the auxiliary crank 94, and bolts 96 are
The spring washer 98 and the end of the auxiliary crank 94 are sequentially inserted, and then screwed to the planting claw 34. The axial projection at the lower end of the vertical link 84 is inserted into a portion of the auxiliary crank 94 that is separated from the rotation center 95, then inserted into the spring washer 100, and further, a nut 102 is screwed into the auxiliary crank 94. It is rotatably connected.

In FIG. 1, a link mechanism 103 converts the rotational displacement of the auxiliary crank 94 into a reciprocating displacement and transmits the reciprocal displacement to the pump lever 92 of the piston pump 60.
It is constituted by each element of the displacement transmission path from 84 to the horizontal link 86.

FIGS. 5 and 6 are a perspective view and a sectional view of the connecting device 82. FIG. The rack 104 is formed along the side of the arm portion 78 opposite the horizontal link 86, and the scale 106
Are engraved or marked on the side surface of the rack 104 to indicate the position of each part of the rack 104. The fitting body 108 is rotatably coupled to the end of the horizontal link 86 via a pin 88 on the horizontal link 86 side, and the fitting groove 10 is formed on the side opposite to the horizontal link 86.
9 is fitted in the arm portion 78 by fitting the arm portion 78 into the fitting groove 109. The shaft 110 extends through a pair of side walls of the fitting body 108 that defines the fitting groove 109 therebetween. The pinion 112 is fitted on the shaft 110, and the gripping knob 114
Is fitted to the end of the pinion 112, and the spring pin 111 is
The end of the shaft 110 is diametrically inserted through the grip knob 114, the pinion 112, and the shaft 110, and the grip knob 114, the pinion 112, and the shaft 110 are integrally rotated. The screw portion 113 is formed at the end of the shaft 110 on the side opposite to the gripping knob 114, protrudes toward the outer surface of one of the side walls of the fitting body 108, and is screwed with a knob nut 115. The arm portion 78 has a pinion 112 so that the rack 104 engages the pinion 112.
And the space 109 defined by the fitting groove 109.

FIG. 7 is a structural view of the piston pump 60.
The cylinder 116 is joined to the discharge port member 118 on the tip side, and the piston rod 120 slides on the seal 122,
It protrudes into the cylinder 116 on the tip side from the seal 122.
The pump lever 92 is pivotally supported around a fulcrum 124 and is rotatably connected to the horizontal link 86 and the piston rod 120 via pins 90 and 126 at upper and lower ends. The valve element 128 and the stopper 130 with the through hole are fixed to the distal end portion of the piston rod 120 at intervals so that the stopper 130 with the through hole is on the distal end side of the valve element 128. The valve seat 132 is
The piston packing 120 is loosely fitted to the piston rod 120 between the valve body 128 and the stopper 130 with the through hole, and the piston packing 134 is fitted to the outer periphery of the valve seat 132 to slidably contact the inner periphery of the cylinder 116. The valve element 128 and the valve seat 132 constitute a suction valve 136, and the pump chamber 137
Is formed in the cylinder 116 on the tip side of the piston rod 120. The discharge valve 138 includes a valve seat 140 whose peripheral edge is sandwiched at a joint between the cylinder 116 and the discharge port member 118, a valve body 142 seated on the valve seat 140 from a side opposite to the pump chamber 137, and a valve body. 142 valve seat 1
And a compression coil spring 144 that presses the compression coil spring 144 against the compression coil spring. The suction port 146 is formed in the cylinder 116 so as to face into the cylinder 116 on the base end side of the suction valve 136, and the discharge port 148 is formed in the discharge port member 118.

When the pump lever 92 reciprocates around the fulcrum 124, the piston rod 120 reciprocates, and accordingly,
The volume of the pump chamber 137 increases and decreases. In the suction stroke in which the piston rod 120 retreats toward the base end, the valve seat 132 contacts the stopper 130 with the through-hole, the suction valve 136 is opened, and the discharge valve 138 is opened.
Is closed. The liquid agent 47 flows into the pump chamber 137 through the suction valve 136 and the through hole of the stopper 130 with a hole. On the other hand, in the discharge stroke in which the piston rod 120 is directed toward the pump chamber 137,
The valve seat 132 contacts the valve element 128, the suction valve 136 is closed,
The discharge valve 138 is opened. Accordingly, the liquid material 47 in the pump chamber 137 is discharged to the discharge port 148 via the discharge valve 138.

FIG. 9 is a configuration diagram of a power transmission system in the rice transplanter 10. The rotational power of the engine 168 is the clutch lever 1
The transmission is transmitted to the transmission 22 via the traveling clutch 172 which is disengaged by the manual operation of the transmission 70, further transmitted from the transmission 22 to the front differential 174, and further transmitted to the rear differential 178 via the propeller shaft 176, It is distributed to the left and right front wheels 24 and rear wheels 26 via a front differential device 174 and a rear differential device 178. The output of the transmission 22 is also transmitted to the PTO shaft 36 via the planting clutch 179.

FIG. 10 is a configuration diagram of a power transmission system in the liquid material spraying device 38. The distribution shaft 180 extends horizontally in the left-right direction, and receives rotational power via the rear end of the PTO shaft 36. The plurality of planting rotary cranks 182 are arranged at equal intervals in the left-right direction, the planting claws 34 are attached to the periphery, and rotate by the rotating power distributed from the distribution shaft 180. Auxiliary crank 94
Is attached to the leftmost planting rotating crank 182 and rotates integrally with the planting rotating crank 182. The vertical link 84 displaces the upper end substantially in the vertical direction with the rotation of the auxiliary crank 94, and reciprocates the double arm lever 70 around the pin 74. The reciprocating swing of the double arm lever 70 is transmitted to the pump lever 92 of the piston pump 60 via the connecting device 82 and the horizontal link 86, and reciprocates the pump lever 92 to drive the piston pump 60.

The operation of the embodiment will be described. Normally,
The knob nut 115 is screwed deeply into the threaded portion 113 of the shaft 110,
The pinion 112 is engaged with the side surface of the fitting body 108, and the rotation of the pinion 112 is restricted. As a result, the pinion 112 is
, And the position in the rack 104 is fixed. The fitting body 108 of the connecting device 82 includes a pinion 112
Reciprocatingly swings together with the arm portion 78 at a swing stroke corresponding to the fixed position of. The horizontal link 86 is connected to the fitting 108 via a pin 88 at an end, and reciprocates in the longitudinal direction at a stroke corresponding to the swing stroke of the fitting 108. Thus, the link mechanism 103 includes the ratio between the swing stroke of the arm portion 78 and the displacement stroke of the horizontal link 86 as an element of the overall link ratio, and the pump lever of the piston pump 60
The 92 is reciprocated around the fulcrum 124. Piston rod 120
Is reciprocated at a stroke corresponding to the link ratio of the link mechanism 103, and the pump chamber 137 is moved by an amount corresponding to the stroke.
Is increased or decreased, and the liquid material 47 is discharged. Thus, the liquid material 47 in the liquid material tank 46 is sucked by the piston pump 60,
It is discharged and is intermittently injected from the nozzle 68 according to the discharge cycle of the piston pump 60.

To change the flow rate of the liquid material 47 sprayed from the nozzle 68, the knob nut 115 is loosened to disengage the knob nut 115 from the side surface of the fitting 108, and the pinion 112, the grip knob 114 and the knob nut 115 is rotatable with respect to the fitting body 108. The operator rotates the gripping knob 114 while gripping it, whereby the pinion 112 rolls on the rack 104 and moves along the rack 104. When the rack 104 reaches the desired position, the knob nut 115 is tightened again to engage the side surface of the fitting body 108, restraining the rotation of the pinion 112, and fixing the position of the pinion 112 in the rack 104. Thereby, the position of the fitting body 108 in the arm portion 78 is changed, and the swing stroke of the fitting body 108 and the displacement stroke of the vertical link 84 at the time of the reciprocating swing of the arm portion 78 are changed. The ratio between the swing stroke and the displacement stroke of the horizontal link 86 changes. As a result, the swing stroke of the pump lever 92 of the piston pump 60 transmitted and driven by the link mechanism 103 changes, and the piston rod 120
Of the liquid pump 47 in each discharge cycle of the piston pump 60, that is, the spray flow rate of the liquid pump 47 from the nozzle 68 changes.

[0021]

According to the present invention, in a liquid sprayer for a rice transplanter, a link mechanism transmits a rotational displacement of a planting claw to reciprocate a reciprocating member of a reciprocating pump, and a connecting device in the link mechanism. Is connected to the swing arm and the link member, and the adjustment of the spraying flow rate of the liquid agent from the nozzle is performed by using a connecting device, in which a pinion that is restrained so that the rotation by the restraining member can be released is provided on the swing arm. It is performed by rolling on the rack and changing the position of the pinion on the rack. Since the movement of the pinion in the rack is reliable and stable, it is possible to improve the efficiency and accuracy of adjusting the flow rate of spraying the liquid.

[Brief description of the drawings]

FIG. 1 is a rear view of a liquid spraying device.

FIG. 2 is a right side view of the liquid spraying device.

FIG. 3 is a left side view of the liquid spraying device.

FIG. 4 is a diagram showing a connection structure between a planting claw and a vertical link.

FIG. 5 is a perspective view of a connecting device.

FIG. 6 is a sectional view of the coupling device.

FIG. 7 is a structural view of a piston pump 60.

FIG. 8 is a schematic side view of a rice transplanter and a liquid spraying device mounted on the rice transplanter.

FIG. 9 is a configuration diagram of a power transmission system in the rice transplanter.

FIG. 10 is a configuration diagram of a power transmission system in the liquid spraying device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rice transplanter 32 Paddy field 34 Planting claw 38 Liquid agent spraying device 47 Liquid agent 60 Piston pump (reciprocating pump) 68 Nozzle 78 Arm part (swinging arm) 82 Connecting device 86 Horizontal link (link member) 103 Link mechanism 104 Rack 108 Fitting Body 112 Pinion 115 Knob nut (restraint member) 120 Piston rod (reciprocating member)

Claims (1)

(57) [Scope of request for utility model registration] In a rice transplanter (10) having a planting claw (34) that is rotationally driven to plant seedlings in a paddy field (32), a pump chamber volume is increased or decreased by reciprocating motion of a reciprocating member (120). A reciprocating pump (60) for sucking and discharging the liquid agent (47), a nozzle (68) for spraying the liquid agent (47) pumped from the reciprocating pump (60) to a paddy field (32), and A link mechanism (103) for converting the rotary motion of the pawl (34) into a substantially linear reciprocating motion and transmitting the reciprocating member (120) to the link mechanism (103).
3) is a swing arm (78) that swings back and forth, and this swing arm
(78) a link member (86) connected via a connection device (82) to the displacement transmission path, and the connection device (82) is provided along a side surface of the swing arm (78). Rack (104),
A pinion (112) that meshes with the rack (104); and a pinion (112) that supports the pinion (112) and is movably fitted to the swing arm (78) by rolling of the pinion (112) in the rack (104). And a fitting (10) connected to the link member (86).
8) and a restricting member (115) for releasably restricting the rotation of the pinion (112).