JPH0646484U - Chemical sprayer - Google Patents

Abstract

(57) [Abstract] [Purpose] A nozzle pipe 90a for spraying a chemical solution in a chemical spray vehicle 10 comprising a field management machine 12 having driving wheels 14 for traveling and a chemical spray device 36 with wheels. ， B
The uniform spraying is performed regardless of the number of nozzles and the traveling speed of the chemical spraying vehicle 10, and the proportional constant between the spray flow rate of the nozzle 92 and the traveling speed of the chemical spraying vehicle 10 can be appropriately adjusted. [Structure] The discharge ports 66a and b of the piston pumps 62a and 62b are not connected to each other, and are connected to the nozzle pipes 90a and 90b individually while the connection is controlled by the opening / closing cocks 96a and 96b. The swing arm 50 swings at a swing frequency that is proportional to the rotation speed of the drive wheels 14 for traveling of the field management machine 12, and
The piston rods 68 of the piston pumps 62a and 62b are reciprocally moved by reciprocally displacing 52 in the rotational direction. The stroke of the piston rod 68 is adjusted by changing the connecting position of the link mechanism 60 in the long hole 54 of the swing arm 50.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drug spraying vehicle for spraying a drug solution while traveling in a field, in which a drive vehicle and a drug solution spraying device with wheels are interconnected, and more specifically, to uniformly spray the drug solution to the field regardless of the traveling speed. The present invention relates to a drug spraying vehicle that can do the above.

[0002]

[Prior art]

 The field management machine has a drive wheel for traveling, and various agricultural working machines with wheels can be connected to it.While traveling by driving the drive wheel for traveling, the operator holds the handle part, It comes to accompany. Then, when the wheeled chemical spraying device is connected to the field management machine, the entire field management machine and the wheeled chemical spraying device become a chemical spraying vehicle, and while running in the field, spraying the chemical solution. The pump of the chemical solution spraying device with spraying has the discharge pressure adjusted by a pressure regulating valve connected to the discharge side, and pumps the chemical solution to the nozzle. In addition, a stirring nozzle is installed in the chemical tank of the chemical spray device with wheels, and the chemical that is discharged as residual liquid is ejected from the stirring nozzle in the chemical tank without being sent to the nozzle from the pressure regulating valve. Then, the chemical solution in the chemical solution tank is stirred.

Further, in such a conventional chemical spraying vehicle, a plurality of nozzle pipes are arranged on the left and right sides, a plurality of pumps of the multiple pump device have a common discharge port, and each nozzle pipe is In addition to being connected to the common discharge port of the multiple pump device, an on-off valve is provided for each nozzle pipe so that operation of the on-off valve can switch between left-side spraying only, right-side spraying, and both-side spraying. Has become.

[0004]

[Problems to be solved by the device]

 Although the traveling speed of the chemical spray vehicle changes depending on the field conditions and the driver's preference, in the conventional chemical spray vehicle, the discharge pressure of the pump is adjusted by the pressure regulating valve, and as a result, the travel speed of the chemical spray vehicle is increased. It becomes constant regardless of the speed, and the spray density of the chemical liquid decreases as the traveling speed increases, and changes in relation to the traveling speed. In order to avoid this, it is necessary to adjust the pressure regulation value, which is complicated.

Further, when the discharge pressure of the multiple pump device is made to be proportional to the traveling speed of the chemical liquid spraying vehicle by using the multiple pump device, each of the multiple pump devices is conventionally required. When the pump discharge port is common and the chemical liquid is pressure-fed to each nozzle pipe from the common discharge port, the spray pressure of the nozzle increases as the number of nozzle pipes spraying the chemical liquid decreases. Therefore, the spray flow rate from the nozzle increases, so when spraying chemicals only from the nozzles of a specific nozzle pipe instead of from all nozzle pipes, such as in pile and fraction spraying, the spray density Becomes uneven. Even if the number of nozzle pipes for spraying the chemical liquid is changed to avoid this, in order to prevent the spray pressure of the nozzles from changing, the operator may change the speed of the speed reducer to make multiple changes. Since it is necessary to adjust the drive speed of the pump device one by one, the operation becomes complicated.

Therefore, in the specification and drawings of Japanese Patent Application No. 4-63874, the rotational speed of the drive shaft of the multiple pump device is made proportional to the rotational speed of the drive wheels for traveling, and each of the multiple pump devices is arranged. The discharge sides of the pumps are not in communication with each other, and each nozzle pipe is individually connected to the discharge side of each pump, and the spraying of the chemical liquid is performed while enabling or stopping the spraying of the chemical liquid for each nozzle pipe. Even when the number of nozzle pipes is changed, the spray pressure of the nozzle during spraying of the chemical solution is kept unchanged. However, although the specification and drawings of Japanese Utility Model Application No. 4-63874 disclose a structure in which the spray pressure of the nozzle is proportional to the traveling speed, the structure in which the proportional constant is appropriately and finely adjusted is described. Not in.

Further, since the stirring nozzle in the chemical liquid tank of the conventional chemical liquid spraying device with wheels jets the chemical liquid sent as spillage from the pressure regulating valve, the jet flow rate from the stirring nozzle is during the chemical liquid spraying. The number of nozzle pipes increases and decreases, and the agitation becomes insufficient, or the capacity becomes excessive, which causes bubbling in the chemical tank.

An object of the invention of claim 1 is to provide a chemical liquid spraying vehicle configured by connecting a wheeled chemical liquid spraying device to a drive vehicle to which various work machines with wheels can be connected. Even if the number of nozzle groups is changed during chemical spraying, it is possible to avoid changing the spray flow rate from the nozzle, and the proportional constant of the spray flow rate of the nozzle to the traveling speed can be finely adjusted as appropriate. Is to An object of the invention of claim 2 is to provide a chemical liquid spraying vehicle capable of appropriately maintaining the jetting flow rate at the stirring nozzle in the chemical liquid tank regardless of switching of the spraying flow rate of the entire nozzle.

[0009]

[Means for Solving the Problems]

 The invention will be described using the reference numerals of the drawings corresponding to the embodiments. The chemical spraying vehicle (10) according to claim 1 is a drive vehicle (12) to which various work machines with wheels are freely connectable, and a chemical spraying device (36) with wheels that is detachably connected to the drive vehicle (12). It has and. The drive vehicle (12) has the following components (a) to (c). (A) Driving drive wheel (14) (b) Output shaft (28) rotating at a rotation speed proportional to the rotation speed of the driving drive wheel (14) (c) Grasp by an accompanying worker during traveling The handle portion (18) The wheel-equipped chemical liquid spraying device (36) has the following components (d) to (j). (D) A transmission shaft (38) that is detachably connected to the output shaft (28) (e) A plurality of reciprocating pumps (62a, b) whose discharge ports (66a, b) are not in communication with each other A multiple reciprocating pump device (44) (f) in which the reciprocating pumps (62a, b) are driven by a common crankshaft (52) and the chemical solution (86) is sucked and discharged by the reciprocating movement of the forward / backward movement member (68). Swing arm (50) that swings and reciprocally displaces the crank shaft (52) in the rotational direction (g) Transmits the crank shaft (52) by connecting the swing shaft to the swing arm (50) in an adjustable radial direction. The link means (60) (h), which is driven by the shaft (38) and swings the swing arm (50) at a swing frequency proportional to the rotation speed of the transmission shaft (38), has a plurality of nozzles ( 92) is connected individually to the discharge ports (66a, b) of the reciprocating pumps (62a, b) of the multiple reciprocating pump device (44) and the chemical solution (86) is not adjusted from the discharge ports (66a, b). Multiple nozzle groups (90a, b) guided under pressure (i) Open / close valves (96a, b) (j) that individually control the connection between the nozzles (62a, b) and each nozzle group (90a, b). Relief valve (100a, b) that releases the chemical liquid (86) from the discharge port (66a, b) of the reciprocating pump (62a, b)

In the chemical spraying vehicle (10) of the second aspect, the multiple reciprocating pump device (44) includes a reciprocating pump (62c) different from the reciprocating pumps (62a, b). This other reciprocating pump (62c) has each discharge port (66a, b) of the reciprocating pump (62a, b) and another discharge port (66c) that is not in communication, and the suction side is the reciprocating pump (62a). , b) is connected to the common chemical liquid tank (84) and is driven by the crankshaft (52). Another discharge port (66c) of another reciprocating pump (62c) is connected to the stirring nozzle (104) in the chemical liquid tank (84).

[0011]

[Action]

 In the chemical spray vehicle (10) of claim 1, the transmission shaft (38) is connected to the output shaft (28) of the drive vehicle (12), and the drive wheel (14) for traveling of the drive vehicle (12) is connected. The link means (60) is driven by rotating at a rotation speed, that is, a rotation speed proportional to the traveling speed of the chemical spraying vehicle (10). The oscillating arm (50) oscillates at an oscillating frequency proportional to the rotation speed of the drive wheels (14) for driving by the driving of the link means (60), and the crankshaft (of the multiple reciprocating pump device (44) ( 52) Move back and forth in the direction of rotation. The reciprocating member (68) of the reciprocating pumps (62a, b) reciprocates along with the reciprocating displacement of the crankshaft (52) in the rotational direction, and each reciprocating pump (62a, b) is driven by the drive wheels for traveling ( The chemical liquid (86) is discharged to each discharge port (66a, b) at a flow rate proportional to the rotation speed of the liquid chemical spray vehicle (14), and thus the traveling speed of the chemical liquid spraying vehicle (10).

When changing the ratio constant of the spray flow rate of the chemical liquid (86) from the nozzle (92) to the traveling speed of the chemical liquid spraying vehicle (10), the link means (60) of the swing arm (50) can be changed. Change the connection position. As a result, the swing stroke of the swing arm (50) changes, and the amount of reciprocal displacement of the crankshaft (52) in the rotational direction, and hence the stroke of the reciprocating member (68) of the reciprocating pumps (62a, b). Changes, the discharge flow rate of the chemical liquid (86) to the discharge port (66a, b) of the reciprocating pump (62a, b) changes.

The liquid medicine (86) from the discharge port (66a, b) of the reciprocating pump (62a, b) in which the open / close valve (96a, b) is open is not regulated by the pressure regulating valve, It is sent to the corresponding nozzle group (90a, b) in a non-pressure adjusted state, and ejected from each nozzle (92) of the nozzle group (90a, b). The relief valve (100a, b) is kept closed when the discharge port (66a, b) of the reciprocating pump (62a, b) is at the spray pressure of the nozzle (92). Thus, the spray flow rate of the nozzle (92) is not related to the number of the nozzle groups (90a, b) that are spraying the chemical liquid (86), and the traveling speed of the chemical spray vehicle (10) is increased. The more it increases.

The discharge port (66a, b) of the reciprocating pump (62a, b) whose on-off valve (96a, b) is closed is connected to the nozzle (92) of the corresponding nozzle group (90a, b). Since the injection of the chemical liquid (86) is blocked, the pressure becomes high. As a result, the relief valve (100a, b) is opened, and the chemical liquid (86) at the discharge port (66a, b) of the reciprocating pump (62a, b) escapes.

In the chemical liquid spraying vehicle (10) of claim 2, another reciprocating pump (62c) of the multiple reciprocating pump device (44) is common with the other reciprocating pumps (62a, b) in the common crankshaft (52). ), Discharges the chemical liquid (86) from another dedicated discharge port (66c) and sends it to the stirring nozzle (104). The chemical liquid (86) in the chemical liquid tank (84) is stirred as the chemical liquid (86) is ejected from the stirring nozzle (104).

[0016]

【Example】

 The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 4 is a perspective view of the entire chemical spray vehicle 10. The chemical liquid spraying vehicle 10 includes a field management machine 12 and a wheeled chemical liquid spraying device 36 which are connected to each other. The field management machine 12 includes left and right driving wheels 14 for driving, an engine 16 for driving the driving wheels 14, and a handle portion 18 that is gripped by an operator and is operated when the chemical spraying vehicle 10 turns. In addition to the wheeled chemical liquid spraying device 36, various agricultural work machines with wheels can be connected to the front part. A wheel-equipped chemical liquid spraying device 36, which is one type of wheeled agricultural working machine, has a frame 20 that extends horizontally in the front-rear direction at an intermediate portion and stands up at front and rear ends, and is freely rotatable on a horizontal portion of the frame 20. Left and right wheels 22 to be mounted, a base 24 fixed to the horizontal part of the frame 20 on which the triple piston pump device 44 and the like are mounted, and a central vertically adjustable position on the front standing part of the frame 20. And a bar 26 that is attached in a horizontal direction and extends horizontally in the left-right direction.

FIG. 1 is a diagram showing a power transmission system of the chemical liquid spraying vehicle 10 and a flow system of the chemical liquid 86. In the field management machine 12, the rotational power of the engine 16 is sent to the PTO shaft 28 via a manually operated traveling clutch 27. The gear transmission 29 is manually operated by the gear shift lever 30 to change the rotation speed of the PTO shaft 28 and transmit the rotation speed to the axle shaft 31. The drive wheels 14 for traveling are attached to both ends of the axle shaft 31 and rotate integrally with the axle shaft 31. The V pulleys 32 and 33 are integrally and rotatably attached to the ends of the PTO shaft 28 and the transmission shaft 38 of the chemical liquid spraying device 36 with wheels, respectively, and are hooked with the V belt 34, and the V pulley 34 and the V pulley 34 are connected via the V belt 34. Rotational power is transmitted to each other. The front end of the field management machine 12 and the rear end of the wheel-equipped chemical liquid spraying device 36 are connected to each other by a plurality of pins 39 that can be inserted and removed.

FIG. 2 is a side view of the triple piston pump device 44 including the power transmission system from the axle shaft 31 of the field management device 12 to the triple piston pump device 44 of the wheeled chemical liquid spraying device 36. . In the wheeled chemical liquid spraying device 36, the transmission shaft 38 extends in the left-right horizontal direction and is rotated by the rotational power from the axle shaft 31 received via the V pulley 33. The rotating arm 40 is integrally and rotatably fixed to the rear end of the transmission shaft 38 at the base end, and rotates the front end side at a predetermined radius as the transmission shaft 38 rotates. The link rod 42 has one end rotatably coupled to the tip of the rotary arm 40, and reciprocates in the left-right direction as the rotary arm 40 rotates. The triple piston pump device 44 includes a crankcase portion 46 and a pump portion 48, and the swing arm 50 is integrally rotatable with the exposed end portion of the crankshaft 52 of the crankcase portion 46 at the base end portion. It has a long hole 54 which is connected and extends in the longitudinal direction at the tip portion. The end portion of the link rod 42 on the swing arm 50 side is bent at a right angle to fit the bush 56, and then inserted into the long hole 54 together with the bush 56 so as to be displaceable in the longitudinal direction of the long hole 54. ing. The thumbscrew 58 is screwed to the outer peripheral side of the bush 56 to rotatably hold the bent end of the link rod 42 via the bush 56, while allowing the bush 56 to move freely in the longitudinal direction of the slot 54. It is fixed to the swing arm 50 at the position. The link mechanism 60 is composed of a rotary arm 40 and a link rod 42, and swings the swing arm 50 at a swing frequency that is proportional to the rotation speed of the transmission shaft 38.

FIG. 3 is a detailed horizontal sectional view of the triple piston pump device 44. The triple piston pump device 44 includes three piston pumps 62a-c driven by a common crankshaft 52. The piston pumps 62a-c have a common suction port 64 and a discharge port 66 that are not in communication with each other. have ac. The piston pumps 62a-c have the same structure, and the phases are arranged at crank angle intervals of 120 ° in the embodiment, but the phases may be the same. In each piston pump 62a-c, the piston rod 68 is connected to the crankshaft 52 at the base end side and reciprocates as the crankshaft 52 rotates. The valve body 70 and the stopper 72 with a through hole are separated from each other in the axial direction of the piston rod 68 so that the stopper 72 with a through hole is on the tip side of the valve body 70, and the stopper 72 with the through hole is axially positioned at the tip portion of the piston rod 68. Is fixed and attached. The valve seat 74 is loosely fitted to the piston rod 68 between the valve body 70 and the stopper 72 with a through hole, and cooperates with the valve body 70 to form an intake valve 78. The piston packing 76 is fitted on the outer peripheral side of the valve seat 74 and slidably contacts the cylindrical wall surface of the pump chamber 80 on the outer peripheral side to seal the pump chamber 80.

Returning to FIG. 1, the chemical liquid tank 84 stores the chemical liquid 86, and the suction pipe line 88 connects the bottom portion of the chemical liquid tank 84 to the suction port 64 of the triple piston pump device 44. The nozzle pipes 90a and 90b are arranged on the left and right sides of the wheel-equipped chemical liquid spraying device 36, respectively, and extend horizontally in the left-right direction, and are provided with a plurality of nozzles 92 facing downward in the longitudinal direction at equal intervals. The discharge pipes 94a, b connect the discharge ports 66a, b of the piston pumps 62a, b to the nozzle pipes 90a, b, respectively, and the opening / closing cocks 96a, b close the nozzle pipes 90a, b with the discharge pipes 94a, b. And discharge lines 94a and 94b are opened and closed. The return pipes 98a and 98b branch from the opening / closing cocks 96a and 96b on the upstream end side of the discharge pipes 94a and 94b on the triple piston pump device 44 side, and join at the downstream end side to form a chemical tank. Go to the top of 84. The relief valves 100a and 100b are respectively arranged in the return conduits 98a and 98b and open the discharge conduits 94a and 94b when a pressure larger than the spray pressure in the nozzle 92 is received from the discharge conduits 94a and 94b. Another discharge pipe 102 connects the discharge port 66c of the piston pump 62c of the triple piston pump device 44 to the lower stirring nozzle 104 in the chemical liquid tank 84.

The operation of the embodiment will be described. When the traveling clutch 27 is brought into the contact state and the gear transmission 29 is brought into the non-neutral state, the PTO shaft 28 and the axle shaft 31 are rotationally driven by the rotational power from the engine 16, and the chemical spray vehicle 10 travels. At the same time, the transmission shaft 38 of the wheeled chemical liquid spraying device 36 is rotated. While the chemical spraying vehicle 10 is running, the worker holds the handle portion 18 of the field management machine 12 and accompanies the chemical spraying vehicle 10 from behind the field management machine 12. Since the rotational speed of the engine 16 and the rotational speed of the drive wheels 14 for traveling are proportional to the rotational speed of the engine 16 and the rotational speed of the transmission shaft 38, the rotational speed of the drive wheels 14 for traveling, that is, The traveling speed of the chemical spraying vehicle 10 and the rotation speed of the transmission shaft 38 are in a proportional relationship with each other. The rotating arm 40 rotates integrally with the transmission shaft 38 to reciprocally displace the link rod 42 of the link mechanism 60 at a repetition frequency proportional to the rotation speed of the transmission shaft 38, and at the same repetition frequency. The swing arm 50 is swung via 60. The crank shaft 52 of the triple piston pump device 44 is reciprocally displaced in the rotational direction within a range of a rotation angle of 180 ° or less along with the swing of the swing arm 50. As a result, the triple piston pump device 44 The piston rod 68 of each piston pump 62a-c reciprocates to increase or decrease the volume of the pump chamber 80. The reciprocating frequency of the reciprocating movement of the piston rod 68 is proportional to the reciprocating frequency of the reciprocating displacement of the crankshaft 52 in the rotating direction, and accordingly, is proportional to the rotational speed of the drive wheel 14 for traveling, and as a result, each piston pump 62a The chemical liquid 86 is discharged to each of the discharge ports 66a-c of c at a flow rate proportional to the rotation speed of the drive wheels 14 for traveling.

The chemical liquid 86 from the discharge port 66c of the piston pump 62c is pressure-fed to the stirring nozzle 104 in the chemical liquid tank 84 through another discharge pipe 102, ejects from the stirring nozzle 104, and is discharged into the chemical liquid tank 84. The chemical solution 86 is stirred. The flow rate of the chemical liquid 86 ejected from the stirring nozzle 104 is proportional to the traveling speed of the chemical liquid spraying vehicle 10 regardless of the number of nozzle pipes 90a and 90b which spray the chemical liquid 86.

The chemical liquid 86 from the discharge ports 66a, b of the piston pumps 62a, b whose opening / closing cocks 96a, b are open is not regulated by the pressure regulating valve, and the corresponding nozzle remains in the non-regulated state. It is sent to the pipes 90a, 90b and jetted from each nozzle 92 of the nozzle pipes 90a, 90b. The relief valves 100a and 100b are kept closed when the discharge ports 66a and 66b of the piston pumps 62a and 62b are at the spray pressure of the nozzle 92. Thus, the spray flow rate of the nozzle 92 is proportional to the rotation speed of the drive wheel 14 for traveling, and increases as the traveling speed of the chemical spraying vehicle 10 increases.

To change the proportional constant of the spray flow rate of the chemical liquid 86 from the nozzle 92 with respect to the traveling speed of the chemical spraying vehicle 10, loosen the thumbscrew 58 and move the bush 56 along the long hole 54 to move the bush 56. To the desired position and then retighten the thumbscrew 58 to secure the bush 56. As a result, the swing stroke of the swing arm 50 changes, the amount of reciprocal displacement in the rotational direction of the crankshaft 52, and thus the stroke of the piston rod 68 of the piston pump 62a-c, changes, and the piston pump 62a- The discharge flow rate of the chemical liquid 86 to each discharge port 66a-c of c changes.

The chemical liquid 86 from the discharge ports 66a, b of the piston pumps 62a, b with the opening / closing cocks 96a, b closed is prevented from being jetted from the nozzle 92, and thus has a high pressure. As a result, the relief valves 100a, 100b are opened, and the chemical liquid 86 in the discharge pipe lines 94a, 94b is returned to the chemical liquid tank 84.

[0026]

【effect】

 According to the invention of claim 1, in the chemical liquid spraying vehicle constituted by connecting the wheeled chemical liquid spraying device to the drive vehicle to which various work machines with wheels can be connected, the linking means of the drive wheels for traveling of the drive vehicle. By swinging the swing arm at a repetition frequency proportional to the rotation speed, the multiple forward and backward pumping device has a plurality of reciprocating pumps whose discharge ports are not in communication with each other. The reciprocating member is moved back and forth by the reciprocating displacement of the crankshaft in the rotating direction to pump the chemical solution from each discharge port to the nozzle group, and each on-off valve is individually operated to open and close to discharge each reciprocating pump. The connection between the outlet and each nozzle group is controlled individually. Therefore, it is possible to maintain the spray flow rate of the chemical solution from the nozzle constant regardless of the number of nozzle groups that are spraying, while making it proportional to the traveling speed of the driving vehicle, that is, the traveling speed of the chemical solution spraying vehicle. it can.

According to the first aspect of the present invention, the stroke of the reciprocating member of the reciprocating pump is changed by adjusting the connecting position of the link means to the swing arm in the radial direction of the crankshaft. The proportional constant of the spray flow rate of the chemical liquid in the nozzle to the traveling speed of the spray truck can be finely adjusted as appropriate.

According to the second aspect of the present invention, the multiple reciprocating pump device of the type in which a plurality of reciprocating pumps are driven by a common crankshaft includes a reciprocating pump different from the reciprocating pump that sends the chemical liquid to the nozzles of each nozzle group. This separate reciprocating pump is designed to send the chemical liquid exclusively to the stirring nozzle in the chemical liquid tank, so the chemical liquid of a predetermined flow rate is jetted from the stirring nozzle regardless of the switching of the spraying flow rate of the entire nozzle. Therefore, proper agitation can be achieved in the chemical tank.

[Brief description of drawings]

FIG. 1 is a diagram showing a power transmission system and a chemical liquid flow system of a chemical spray vehicle.

FIG. 2 is a side view of the triple piston pump device including the power transmission system from the axle shaft of the field management machine to the triple piston pump device of the chemical spraying device with wheels.

FIG. 3 is a detailed horizontal sectional view of a triple piston pump device.

FIG. 4 is a perspective view of the entire chemical spraying vehicle.

[Explanation of symbols]

10 Chemical spraying vehicle 12 Field management machine (driving vehicle) 14 Driving drive wheel 18 Handle portion 28 PTO shaft (output shaft) 36 Chemical spraying device with wheels 38 Transmission shaft 44 Triple piston pump device (multiple reciprocating pump device) 50 swing arm 52 crankshaft 60 link mechanism (link means) 62a, b piston pump (reciprocating pump) 62c piston pump (another reciprocating pump) 66a, b discharge port 66c discharge port (another discharge port) 68 piston rod ( Reciprocating member) 84 chemical liquid tank 86 chemical liquid 90a, b nozzle pipe (nozzle group) 92 nozzle 96a, b open / close cock (open / close valve) 100a, b relief valve 104 agitation nozzle

Claims (2)

[Scope of utility model registration request] 1. A drive vehicle (12) capable of connecting various working machines with wheels and a wheel-equipped chemical liquid spraying device (36) detachably connected to the drive vehicle (12), the drive vehicle (12) comprising: 12) is gripped by a traveling drive wheel (14), an output shaft (28) rotating at a rotational speed proportional to the rotational speed of the traveling drive wheel (14), and an operator accompanying the vehicle during traveling. Has a handle portion (18),
The wheeled chemical liquid spraying device (36) includes a transmission shaft (38) that is detachably connected to the output shaft (28) and a plurality of reciprocating discharge ports (66a, b) that are not in communication with each other. Each reciprocating pump (62a, b) is equipped with a pump (62a, b) driven by a common crankshaft (52), and the reciprocating member (68) reciprocates to move the chemical liquid.
A multiple reciprocating pump device (44) for sucking and discharging (86), a swing arm (50) for swinging and reciprocally displacing the crankshaft (52) in a rotational direction, and a radial direction of the crankshaft (52). The transmission shaft (38) is connected to the swing arm (50) so that the connecting position can be adjusted.
Is driven by the link means (6) for swinging the swing arm (50) at a swing frequency proportional to the rotation speed of the transmission shaft (38).
0) and each of the reciprocating pumps (62a, b) of the multiple reciprocating pump device (44) having a plurality of nozzles (92).
(66a, b) individually connected to the discharge port (66a, b) a plurality of nozzle groups (90) to guide the chemical liquid (86) in a non-regulated state (90
a, b), the reciprocating pumps (62a, b) and the nozzle groups (90
a, b) an on-off valve (96a, b) for individually controlling connection with each of the reciprocating pumps (62a, b), which is opened by a hydraulic pressure higher than the spray pressure of the nozzle (92). The chemical solution (86) at the outlet (66a, b)
And a relief valve (100a, b) for releasing the chemical liquid spray vehicle. 2. The multiple reciprocating pump device (44) includes a reciprocating pump (62c) different from the reciprocating pumps (62a, b), and the different reciprocating pump (62c) is the reciprocating pump (62c). 62a, b) has a separate discharge port (66c) that is not in communication with each discharge port (66a, b), and the suction side is connected to the chemical tank (84) common to the reciprocating pump (62a, b). Further, driven by the crankshaft (52), the another discharge port (66c) of the another reciprocating pump (62c) is connected to the stirring nozzle (104) in the chemical liquid tank (84). The chemical spraying vehicle according to claim 1, which is characterized in that.