JP3339318B2 - Liquid injection car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injecting vehicle for injecting a chemical solution or the like into the ground while traveling, and more particularly to a liquid injecting vehicle capable of efficiently injecting an injection liquid to a sufficient depth in the ground. It is.

[0002]

2. Description of the Related Art In a liquid injection vehicle disclosed in Japanese Patent Application Laid-Open No. 8-56546, a liquid is injected from a nozzle at a high pressure while a nozzle is relatively moved in a counter running direction with respect to the liquid injection vehicle, and the injection liquid is injected into the ground. Injecting. The nozzle is almost stopped with respect to the ground despite the running of the liquid injection vehicle due to the relative movement in the anti-running direction with respect to the liquid injection vehicle. As a result, the jet liquid from the nozzle is efficiently injected into the ground sufficiently deep.

In a liquid injection vehicle disclosed as an embodiment of Japanese Patent Application Laid-Open No. 8-56546, a reciprocating movement of a nozzle in a front-rear direction is performed by an electric actuator (FIG. 1) or a crank plate (FIG. 1) which rotates integrally with a pump rotating shaft. FIG. 3). The opening and closing of the nozzle is performed by a control signal from a computer.

[0004]

When the reciprocating movement of the nozzle in the front-rear direction is performed by an electric actuator, a power supply or the like is required, and the apparatus becomes complicated. Further, when the nozzle is reciprocated by a crank plate that rotates integrally with the pump rotation shaft, there is a restriction that the nozzle must be disposed near the pump.

When the nozzle is opened and closed by a control signal from a computer, the computer must be mounted, and the apparatus becomes complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid injection vehicle which injects an injection liquid from a nozzle while relatively moving the nozzle in a counter running direction, omitting an electric actuator which causes the apparatus to be complicated, and disposing a nozzle near a pump. Is to eliminate the constraint of Another object of the present invention is to provide a liquid injection vehicle that injects an injection liquid from a nozzle while relatively moving the nozzle in a counter-running direction. Is to be able to do it.

[0007]

According to the present invention, there is provided a liquid injection vehicle (2).
6) has the following elements (a) to (c). (A) a nozzle (36) for injecting a liquid toward the ground (16); (b) a nozzle drive member (62) for reciprocating the nozzle (36) in a running direction and a counter running direction by the rotational force of a wheel (30). (C) nozzle opening / closing means (38, 40) for opening the nozzle (36) in accordance with the movement period of the nozzle (36) in the opposite running direction

[0008] In the present specification, the rotational force of the wheel (30) means the rotational force transmitted from the driving motor for driving the wheel (30) when the wheel (30) is a driving wheel, and Wheel
If (30) is simply a driven wheel rolling on the ground (16),
It includes at least the rolling power of the wheels (30) transmitted from the ground (16) to the wheels (30).

The nozzle driving member (62) reciprocates the nozzle (36) in the running direction and the counter running direction by the rotational force of the wheel (30). The nozzle (36) is set to the open position by the nozzle opening / closing means (38, 40) in accordance with the movement period in the counter running direction, and ejects the liquid to the ground (16) during the movement period in the counter running direction. The nozzle (3) in the traveling direction due to the traveling of the liquid injection vehicle (26)
6), during the movement period of the nozzle (36) in the anti-running direction, the relative speed to the ground (16) is appropriately reduced by the moving speed of the nozzle driving member (62) in the anti-running direction,
The nozzle (36) approaches the stopped state with respect to the ground (16). As a result, the liquid ejected from the nozzle (36) is
In the traveling direction of 6), the fuel is jetted in a concentrated manner on a limited area of the ground (16), and efficiently reaches a sufficient depth in the ground even if the pressure is not so high. In this liquid injecting wheel (26), since the rotational force of the wheel (30) is used as the reciprocating motion force in the running direction and the counter running direction of the nozzle (36), a complicated electric actuator is omitted, and the vicinity of the pump is reduced The restriction of the arrangement of the nozzle (36) can be eliminated. In addition, the nozzle (36) is reciprocated by the rotational force of the wheel (30), whereby the nozzle (36)
The reciprocating speed of the liquid is related to the traveling speed of the liquid injection vehicle (26).
Despite the increase / decrease of the traveling speed of (26), it can be kept constant.

Another liquid injection wheel (26) of the present invention has the following elements (a) to (c) . (A) A nozzle (3) having an operation unit (72) for opening and closing and injecting liquid toward the ground (16) in the open position.
6) (b) a nozzle drive member (62) for reciprocating the nozzle (36) in the running direction and the counter running direction; and (c) an operating section (7) disposed on the movement path of the nozzle (36).
The operation unit (72) is moved by contact with the nozzle (2), and the nozzle (3) is moved in accordance with the movement period of the nozzle (36) in the counter running direction.
6) abutment member (38, 40) for opening position

The nozzle (36) is reciprocated in the running direction and the counter running direction by the nozzle driving member (62). Nozzle (36)
Along with the movement, the operation section (72) is brought into contact with the contact members (38, 40) to be opened and closed, and the opening period is controlled in accordance with the movement in the opposite running direction. The nozzle (36) is moving in the traveling direction along with the traveling of the liquid injection vehicle (26).
The moving speed in the running direction due to the running of (26) is, while the nozzle (36) is moving in the opposite running direction by the nozzle driving member (62),
This is appropriately offset by the moving speed of the nozzle driving member (62) in the counter running direction, and the relative speed of the nozzle (36) to the ground (16) is sufficiently reduced. In this way, the jet liquid from the nozzle (36) is intensively jetted on the ground (16) in a narrow range in the traveling direction, and efficiently reaches a sufficient depth in the ground even if the pressure is not so high. In this liquid injection vehicle (26), the nozzle (3
Since the electric control means such as a computer can be omitted in the opening / closing control of 6), the structure of the liquid injection vehicle (26) can be simplified.

Another liquid injection wheel (26) of the present invention has the following elements (a) to (c). (A) a nozzle (36) having an operation unit (72) for opening and closing and injecting liquid toward the ground (16); (b) a nozzle ( The nozzle drive member (62) for reciprocating the nozzle drive member (62) (c) The nozzle drive member (62) which is disposed on the movement path of the nozzle (36) and moves the operation portion (72) by contact with the operation portion (72). )
Abutment members (38, 40) for opening the nozzle (36) in accordance with the movement period of the nozzle (36) in the counter running direction due to

The nozzle driving member (62) reciprocates the nozzle (36) in the running direction and the anti-running direction by the rotational force of the wheel (30). The nozzle (36) moves the operation part (72) as the contact member moves.
(38, 40), the opening / closing operation is performed, and the opening period is controlled in accordance with the movement in the opposite running direction. Nozzle (36)
The nozzle is moving in the traveling direction along with the traveling of the liquid injection vehicle (26), but the nozzle is moved in the opposite traveling direction by the nozzle driving member (62).
During the movement of (36), the nozzle in the running direction with respect to the ground (16)
The moving speed of (36) is appropriately reduced. Thus, the nozzle
The liquid ejected from (36) has a small area in the running direction on the ground (16)
, And efficiently reach a sufficient depth in the ground even if the pressure is not so high. In the liquid injecting wheel (26), since the electric actuator is not used to reciprocate the nozzle (36) in the traveling direction and the opposite traveling direction, the structure of the liquid injecting wheel (26) can be simplified. Further, since the crank plate of the pump rotation shaft is not used, the restriction that the nozzle (36) must be disposed near the pump can be eliminated. Further, since the electric control means such as a computer can be omitted for controlling the opening and closing of the nozzle (36), the structure of the liquid injection wheel (26) can be simplified.

According to another liquid injection vehicle (26) of the present invention,
The nozzle driving member (62) circulates in the front-back direction and the nozzle (36)
And a revolving member (62) entraining in the front-rear direction.

The orbiting member (62) orbits by the rotational force of the wheel (30). The nozzle (36) reciprocates in the front-rear direction with the orbiting of the orbiting member (62) in the fore-and-aft direction, moves in the traveling direction in one half of the orbiting of the orbiting member (62), and moves the orbiting member (62). In the other half-turn, it moves in the opposite running direction.

According to another liquid injection vehicle (26) of the present invention,
The orbiting speed of the orbiting member (62) is set substantially at the running speed.

As a result of the orbiting speed of the orbiting member (62) being substantially equal to the running speed, during the period in which the nozzle (36) is moving in the anti-running direction by the orbiting member (62), the counter-movement by the nozzle driving member (62) is performed. The moving speed of the orbiting member (62) in the direction and the liquid injection wheel (26)
The traveling speed of the orbiting member (62) in the traveling direction due to traveling of the vehicle becomes substantially equal. Thereby, during a period in which the nozzle (36) is moving in the counter running direction by the nozzle driving member (62), the relative speed of the nozzle (36) with respect to the ground (16) becomes substantially zero,
The jet liquid from the nozzle (36) is concentrated and injected substantially at one point on the ground (16), and can be efficiently injected to a desired depth in the ground.

According to another liquid injection vehicle (26) of the present invention,
The turning force of the wheel (30) is the rolling power of the wheel (30) on the ground (16).

The wheels (30) roll on the ground (16),
Receive rolling power from This rolling power is used as reciprocating power of the nozzle (36). Thus, the nozzle (36) can be reciprocated without any motor such as an engine.

According to another liquid injection vehicle (26) of the present invention,
The positions of the contact members (38, 40) are adjustable.

By adjusting the position of the contact members (38, 40), the timing at which the operating portion (72) of the nozzle (36) is moved by contacting the contact members (38, 40) changes. The switching period and the opening period of (36) change. Thus, the injection start or end timing, and the injection time of the liquid from the nozzle (36),
Therefore, the injection amount can be appropriately adjusted.

According to another liquid injection vehicle (26) of the present invention,
The vehicle is connected to the self-propelled vehicle (10) so that it can be released.

The liquid injection vehicle (26) is connected to the self-propelled vehicle (10) and travels. Accordingly, the liquid injection vehicle (26) does not require a driving power source, and the use efficiency of the self-propelled vehicle (10) can be improved. .

According to another liquid injection vehicle (26) of the present invention,
The self-propelled vehicle (10) is a pump (18) that pumps liquid to the nozzle (36).
Equipped with

The liquid injecting vehicle (26) is connected to a self-propelled vehicle (10) equipped with a pump (18), and injects a liquid pumped from the pump (18) through a nozzle (36). Perform injection work. Since the liquid injection vehicle (26) itself is not provided with the pump (18), the structure of the liquid injection vehicle (26) is simplified, and the self-propelled vehicle (10) has a work machine to be connected. It can be replaced as appropriate other than the liquid injection vehicle (26) and can be used for various spraying operations (eg, spraying a chemical solution on crops), and the usage efficiency increases.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 6 is a schematic side view of the towed liquid injection vehicle 26 connected to the self-propelled pump vehicle 10. Self-propelled pump truck
10 has a total of four tires 14 at the front, rear, left and right of the lower part, of which at least two tires 14 on the front side or the rear side are driving wheels, and the tires 14 as driving wheels automatically drive on the ground 16. It is free to run. The tank 12 is a self-propelled pump car 10
It is disposed at the rear of the tank and stores liquids such as a liquid for extermination, a liquid for fertilizer, and water according to work. The pressure pump 18 is provided in the self-propelled pump car 10 and sucks and discharges the liquid in the tank 12.

The towed liquid injecting vehicle 26 can be driven by one tire 30. The chain case 28 is disposed on only one side or both sides of the tire 30, and is connected to a rear portion of the self-propelled pump vehicle 10 via a connection frame 32 at a front end, and is held horizontally by this connection. Pumping hose
Numerals 34 are connected at both ends to the discharge port of the pressure pump 18 and the hose joint 78, respectively, and guide the pumped liquid from the pressure pump 18 to the hose joint 78. Nozzle 36 is a chain case
It is located on the side of 28 and faces downward. Front projection 38
The rear projection 40 is disposed on the movement path of the nozzle 36 in the front-rear direction.

FIG. 1 is a schematic perspective view of a main part of a towed liquid injection vehicle 26. The sprocket shaft 46 extends horizontally in the left-right direction, and is rotatably supported at both ends by the chain case 28 and the like. The tire side sprocket 48 is
And rotates integrally with the tire 30. The shaft-side sprocket 50 is rotatably fitted to the sprocket shaft 46, and the clutch 52 is controlled in connection and disconnection via a clutch wire 54, and connects the shaft-side sprocket 50 to the sprocket shaft 46 at the time of contact. The chain 56 is hung on the tire-side sprocket 48 and the shaft-side sprocket 50 to transmit rotational power. The rear sprocket 58 is connected to the sprocket shaft 46.
And rotates integrally with the sprocket shaft 46. The front sprocket 60 has the same diameter as the rear sprocket 58, and is disposed in front of the rear sprocket 58 and at the same height as the rear sprocket 58. The distance 2L, which is twice the distance L between the rear sprocket 58 and the front sprocket 60, is equal to the injection pitch interval on the ground 16 in the traveling direction of the towed liquid injection vehicle 26. The chain 62 is hung around the rear sprocket 58 and the front sprocket 60, and goes around between the rear sprocket 58 and the front sprocket 60. The number of teeth of the tire-side sprocket 48, the shaft-side sprocket 50, and the rear-side sprocket 58 are set such that the circumferential speed of the chain 62 is equal to the circumferential speed of the tire 30, that is, the running speed of the towed liquid injection vehicle 26. You. In order to make the revolving speed of the chain 62 equal to the traveling speed of the towed liquid injection vehicle 26, the rear sprocket 58
A gear-type transmission may be disposed in the rotational force transmission path up to the transmission. The guide plate 64 has a long guide hole 66 that is long in the vertical direction. The guide pin 67 is fixed to a predetermined portion of the chain 62, and is inserted into the elongated guide hole 66. Guide pin 67
It moves around the chain 62 integrally with the chain 62 and moves in the front-rear direction and the up-down direction of the towed liquid injection vehicle 26. Since the guide slot 66 absorbs the vertical movement of the guide pin 67, the guide plate 64
While maintaining the height, the guide pin 67 is used to drive the towed liquid injection vehicle 26 in the front-rear direction, and
Reciprocates in the front-rear direction. The nozzle 36 is located at the lower end of the nozzle
68, a ball valve 70 above the ball valve 70, and a ball valve 70 which is disposed outside the ball valve 70 and whose upper end is swung.
And an operation lever portion 72 for changing the rotational position of the ball as a valve element in the inside. The connection hose 74 is provided with a hose joint 78 at one end, and is connected to the pressure feeding hose 34 (FIG. 6) via the hose joint 78. The connection hose 74 is also connected to the nozzle 36 at the other end, and guides the pumped liquid from the pumping pump 18 (FIG. 6) to the nozzle 36. The bracket 76 is fixed to the lower end of the guide plate 64, protrudes laterally, and the nozzle 36 is attached.

FIG. 2 is a side view showing the chain case 28 partially cut away, FIG. 3 is a sectional view taken along the line D1-D2-D3-D4 in FIG. 2, and FIG. 4 is a sectional view taken along the line E4-E4 in FIG. FIG. In FIG. 2, A indicates the traveling direction of the towed liquid injection vehicle 26. The pair of guide rods 80 are vertically separated from each other by a predetermined distance, fixed at both ends near the front and rear side plates of the chain case 28, and extend horizontally in the front-rear direction of the towed liquid injection vehicle 26.

In FIGS. 3 and 4, the guide plate 64 is provided with an overhang 98 at the upper and lower ends to project toward the guide rod 80. The rod 80 guides the towed liquid injection vehicle 26 in the front-rear direction. The chain case 28 is a towed liquid injection vehicle
It has a case body 84 that opens to the side of 26, and a cover 86 that closes the opening side of the case body 84. The cylindrical portion 88 is
The sprocket shaft 46 is provided on the side wall of the case body 84 facing the cover 86, and penetrates the cylindrical portion 88 at the end, and is inserted into the chain case 28. The C-shaped retaining rings 92 and 93 are respectively fitted to the periphery of the sprocket shaft 46 and the inner periphery of the cylindrical portion 88 at substantially the same position in the axial direction of the sprocket shaft 46, and the two ball bearings 90 are connected in series to the sprocket. The sprocket shaft is pushed into the cylindrical portion 88 until the ball bearing 90 on the inner side in the left and right direction hits the C-shaped retaining rings 92 and 93 respectively.
46 is rotatably supported on the cylindrical portion 88. The rear sprocket 58 is fitted on the sprocket shaft 46 further outward in the left-right direction of the ball bearing 90, and the C-shaped retaining ring 94 is fitted on the sprocket shaft 46, and the rear sprocket 58 and the ball bearing 90 are cylindrically mounted. Pressing toward 88.
The oil seal 96 is fitted to the sprocket shaft 46 on the inner side in the left-right direction from the C-shaped retaining ring 92, inserted into the cylindrical portion 88, and prevents leakage of lubricating oil in the chain case 28.

In FIG. 2 to FIG.
Are attached to the case body 84 via the brackets 101 at the front and rear ends, and extend horizontally in the front-rear direction over the entire range between the front and rear side walls of the chain case 28.
The hose joint 78 is attached to the lower portion of the front side wall of the chain case 28, and the connecting hose 74 extends spirally around the hose guide rod 100. With the reciprocation of the nozzle 36 in the front-back direction of the towed liquid injection vehicle 26, the distance between the hose joint 78 and the nozzle 36 changes.At this time, the spiral connection hose 74 increases or decreases the spiral pitch. And hose guide rod 100
In the axial direction, thereby preventing entanglement with other parts. In FIG. 4, the shaft 102 is fixed to the side wall of the case body 84 facing the cover 86, and projects outward in the left-right direction. The front sprocket 60 has two ball bearings 10
The shaft 102 is rotatably supported by the tip of the shaft 102. The front projection 38 and the rear projection 40 are fixed to the outer surface of the cover 86, and come into contact with the operation lever 72 as the nozzle 36 reciprocates. Front protrusion 38 on the outer surface of cover 86
Can be appropriately adjusted in the front-rear direction of the towed liquid injection vehicle 26. The rear projection 40 is fixed to the vertical diameter position of the rear sprocket 58 substantially in the front-rear direction of the towed liquid injection vehicle 26, but like the front projection 38, the towed liquid injection vehicle 26
It may be adjustable in the front-back direction of 26. As described later, the positions of the front projection 38 and the rear projection 40 determine the opening timing and the closing timing of the nozzle 36, respectively.

FIG. 5 is a front view for explaining the operation of the nozzle 36. As shown in FIG. The structure of the nozzle 36 shown in FIG. 5 is already known, for example, in Japanese Utility Model Publication No. 61-25895. The operation lever portion 72 includes protrusions 106 and 108 that protrude upward and downward, respectively. Information window 110 is 2
It has a shape in which a plurality of sectors are arranged point-symmetrically. The ball shaft 114 is connected to a ball (not shown) in the ball valve 70 of the nozzle 36, and rotates integrally with the ball. The handle 112 has a horizontal rod shape with respect to the ball axis 114, and the ball axis
It is fixed to the exposed end of 114, is located in the guide window 110, and rotates integrally with the ball in the ball valve 70. Torsion coil spring
The coil 116 is fitted on the boss portion of the ball valve 70 with its both ends locked to the projecting portion 108 of the operation lever 72. The opposite ends of the torsion coil spring 116 urge the protruding portions 108 in opposite directions, respectively, and prevent the stopper 108 (not shown) from being displaced beyond the position shown in FIG. The operation lever 72
In the period when no external force is applied, the torsion coil spring
It is held in the upright position shown in FIG.
5, A indicates the traveling direction of the towed liquid injecting vehicle 26, similarly to A of FIG. 2, and B indicates the current moving direction of the nozzle 36 with respect to the chain case 28.

(A) In the state of FIG. 5, the nozzle 36 is in the open position with the handle 112 in the vertical position,
The towed liquid injection vehicle 26 is relatively moved with respect to the chain case 28 in the direction B, which is a direction opposite to the traveling direction. Projection 106
Abuts on the rear projection 40 in the direction B, the operating lever 72
5, the guide window 110 does not entrain the handle 112 in the counterclockwise direction, and the handle 112 is held in the upright position.
Holds the open position.

(B) After the protruding portion 106 tilts and gets over the rear protrusion 40 in the direction B, the operating lever portion 72 returns from the tilting position to the upright position by the urging force of the torsion coil spring 116, and The moving direction of the nozzle 36 with respect to the chain case 28 reverses from the direction B to the direction A. Projection 106
This time, it comes into contact with the rear protrusion 40 in the direction A and tilts in the direction B. At this time, the operation lever unit 72 rotates clockwise in FIG. 5, and the guide window 110 causes the handle 112 to be entrained clockwise to rotate the handle 112 from the upright position to the horizontal position. Accordingly, the ball in the ball valve 70 rotates, and the nozzle 36 is switched from the open position to the closed position.
Thereafter, the operating lever 72 returns to the upright position according to the biasing force of the torsion coil spring 116.

(C) Next, when the protrusion 106 abuts on the front protrusion 38 in the direction A, the protrusion 106 tilts in the direction B, and the operating lever 72 rotates clockwise, the handle 112 is turned. Due to the horizontal position, the guide window 110 is
Without entraining 12, nozzle 36 holds the closed position. And
The protrusion 106 returns to the upright position according to the biasing force of the torsion coil spring 116.

(D) Nozzle beyond front projection 38 in direction A
36 then reverses the direction of movement from direction A to direction B. Then, the protruding portion 106 comes into contact with the front protrusion 38 in the direction B, and the operation lever portion 72 rotates counterclockwise. At this time, since the handle 112 is in the horizontal position before the rotation of the operation lever 72 in the counterclockwise direction, the handle 112 is rotated counterclockwise by the guide window 110, and is rotated from the horizontal position to the upright position. The nozzle 36 is switched from the closed position to the open position.

Since the rear projection 40 is substantially at the vertical diameter position of the rear sprocket 58 (FIG. 1) in the front-rear direction, the nozzle 36 abuts the rear projection 40 in the A direction and cuts from the open position to the closed position. The switching time is when the nozzle 36 is projected backward in the B direction.
It is almost equal to the time of contact with 40. Therefore, nozzle 36
The opening period is from the time when the towed liquid injection vehicle 26 exceeds the front protrusion 38 in the opposite running direction to the time when the movement of the chain case 28 in the B direction is almost completed, and during this period, the nozzle 36 Liquid is sprayed onto the ground 16.
By changing the position of the front protrusion 38 in the front-rear direction of the towed liquid injection vehicle 26, the timing at which the nozzle 36 switches from the closed position to the open position is adjusted, and the opening time of the nozzle 36 is also adjusted. .

The overall operation of the towed liquid injection vehicle 26 will be described. The towed liquid injection vehicle 26 is connected to the connecting frame 32
, And is connected to the rear part of the self-propelled pump car 10. The rear end of the pressure feeding hose 34 is connected to the hose joint of the towed liquid injection vehicle 26.
78, the pump 18 of the self-propelled pump 10 sucks the liquid in the tank 12, and the pump hose 34 and the connection hose
The pressure is fed to the nozzle portion 68 of the nozzle 36 via 74. The driver gets on the self-propelled pump car 10 and runs the self-propelled pump car 10. The towed liquid injection vehicle 26 is towed by the self-propelled pump vehicle 10 and the tires 30 roll on the ground 16. Tire 30
Is supplied with rolling power from the ground 16 with the rolling on the ground 16. The tire-side sprocket 48 rotates integrally with the tire 30, and the rolling power of the tire 30 is transmitted to the shaft-side sprocket 50 via the chain 56. The driver of the self-propelled pump car 10
When the operation of injecting the liquid into the ground 16 is performed, the clutch 52 is brought into the contact position via the clutch wire 54. This allows
The sprocket shaft 46 receives the rolling power of the tire 30,
Rotating, the chain 62 is driven by the rear sprocket 58 and the rear sprocket 58 and the front sprocket
Orbit around 60. Further, the circumferential speed of the chain 62 is substantially equal to the circumferential speed of the tire 30, that is, the running speed of the towed liquid injection vehicle 26 by setting the number of teeth of the tire side sprocket 48, the shaft side sprocket 50, and the rear side sprocket 58. Become equal.

The guide plate 64 is entrained by a guide pin 67 that circulates integrally with the chain 62, and is driven by the towed liquid injection vehicle 26.
As a result, the nozzle 36 also reciprocates with respect to the chain case 28 in the front-rear direction of the towed liquid injection vehicle 26. As the nozzle 36 reciprocates in the front-rear direction with respect to the chain case 28, the operation lever 72 is brought into contact with the front projection 38 and the rear projection 40, and the operation lever 72 is rotated to switch between opening and closing. In this manner, the nozzle 36 is held at the open position during a period from when the nozzle 36 has passed the front protrusion 38 in the direction opposite to the traveling direction to the chain case 28 to when the movement in the direction opposite to the traveling direction is almost completed. The liquid is sprayed on the ground 16. Since the moving speed of the nozzle 36 with respect to the chain case 28 in the opposite running direction is substantially equal to the running speed of the towed liquid injection vehicle 26, the movement of the nozzle 36 with respect to the chain case 28 in the opposite running direction The moving speed of the nozzle 36 is almost 0, and the nozzle 36 is almost stopped with respect to the ground 16. Therefore, the nozzle 36 is substantially stopped with respect to the ground 16 and ejects the liquid, so that the ejected liquid reaches a sufficient depth in the ground without much pressure.

Since the rotational speed of the tire 30 and the circling speed of the chain 62 are in a proportional relationship, the circulating speed of the chain 62 is proportional to the running speed of the towed liquid injecting vehicle 26. Regardless of the traveling speed of the nozzle 26, the nozzle 36 moves in the opposite
Stop almost against.

By changing the position of the front projection 38 in the front-rear direction of the towed liquid injection vehicle 26, the timing at which the nozzle 36 switches from closed to open is changed, and as a result, the opening period of the nozzle 36, and thus the ground level The injection volume per injection to 16 is adjusted. Further, as the difference between the rotation speed of the chain 62 and the traveling speed of the towed liquid injection vehicle 26 increases, the nozzle 36
The relative speed of the nozzle 36 with respect to the ground 16 during the injection of liquid from the nozzle increases, and the length of the injection line of the liquid jet on the ground 16 increases. When there is a difference between the circling speed of the chain 62 and the traveling speed of the towed liquid injection vehicle 26, the front projection
By changing the position of 38, the length of the injection line is arbitrarily changed.

The distance between the rear sprocket 58 and the front sprocket 60 corresponds to the pitch of the injected liquid on the ground 16 in the running direction. Therefore, the interval between the rear sprocket 58 and the front sprocket 60 is set in accordance with the pitch interval.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part of a towed liquid injection vehicle.

FIG. 2 is a side view showing a partially broken chain case.

FIG. 3 is a sectional view taken along line D1-D2-D3-D4 of FIG. 2;

FIG. 4 is a sectional view taken on line E4-E4 of FIG. 2;

FIG. 5 is a front view for explaining the operation of the nozzle.

FIG. 6 is a schematic side view of the towed liquid injection vehicle connected to a self-propelled pump vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Self-propelled pump car (self-propelled car) 16 Ground (pump) 18 Pumping pump 26 Traction type liquid injection car 30 Tire (wheel) 36 Nozzle 38 Front projection (nozzle opening / closing means, contact member) 40 Rear projection (nozzle) Opening / closing means, abutting member) 62 Chain (nozzle driving member) 72 Operation lever section (operation section)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01M 17/00 A01C 23/02

Claims (7)

(57) [Claims] 1. An operation unit (72) operated to open and close.
A nozzle (36) for ejecting liquid toward the ground (16) in the open position; (b) a nozzle drive member (62) for reciprocating the nozzle (36) in a running direction and a counter running direction; ) The operation unit (7) disposed on the movement path of the nozzle (36).
The contact member (38, 4) that moves the operation unit (72) by contact with the nozzle (2) to open the nozzle (36) in accordance with the movement period of the nozzle (36) in the counter running direction.
0), wherein the position of the contact member (38, 40) is adjustable. (A) an operation unit (72) operated to open and close;
(B) a nozzle driving member (62) for ejecting a liquid toward the ground (16), and (b) a nozzle driving member (62) for reciprocating the nozzle (36) in a running direction and a counter running direction by the rotational force of a wheel (30). And (c) the operating portion (72) is moved along the moving path of the nozzle (36) by contact with the operating portion (72) to move in a direction opposite to the traveling direction of the nozzle driving member (62). A contact member (38, 40) for opening the nozzle (36) in accordance with the movement period of the nozzle (36), and the contact member (38, 40) can be adjusted in position. A liquid injection vehicle characterized by the following. 3. The liquid injection device according to claim 2, wherein the nozzle driving member includes a circulating member that circulates in the front-rear direction and entrains the nozzle in the front-rear direction. car. 4. The liquid injection vehicle according to claim 3, wherein the orbiting speed of the orbiting member is set substantially at a running speed. 5. The rotating force of the wheel (30) is applied to the ground (1).
The liquid injection vehicle according to any one of claims 2 to 4 , wherein the driving force is the rolling power of the wheel (30) in (6). 6. The liquid injection vehicle according to claim 1 , wherein the vehicle runs while being releasably connected to a self-propelled vehicle (10). 7. The self-propelled vehicle (10) is provided with the nozzle (3)
7. The liquid injection vehicle according to claim 6, further comprising a pump for pumping the liquid to the liquid supply.