JP2935090B2 - High pressure liquid injection vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure liquid injection vehicle for injecting high-pressure liquid from a nozzle into the ground while traveling on the ground such as turf, and more particularly to a safety function for injection of high-pressure liquid from a nozzle. The present invention relates to a high-pressure liquid injection vehicle to be equipped.

[0002]

2. Description of the Related Art A high-pressure liquid injection vehicle that performs high-pressure liquid injection from a nozzle toward the ground intermittently while running on a lawn or the like to form a through hole in the ground and perform an air rate, fertilization, and the like has been known. ing.

[0003] The conventional high-pressure liquid injection vehicle does not have a special safety function with respect to the injection of the high-pressure liquid from the nozzle.

[0004]

The injection of the high-pressure liquid from the nozzle involves danger, so that safety measures must be taken against erroneous operations by the operator. Safety considerations include the following: (A) The nozzle device is lowered at the pouring work place so that the high-pressure liquid is sufficiently close to the ground so as to inject the high-pressure liquid to a predetermined depth in the ground. When the vehicle travels on a general road with a place, the vehicle is raised at a proper distance from the ground, but the high-pressure liquid is not injected from the nozzles except at the lower position of the nozzle device. (B) The high-pressure liquid injection vehicle is driven at a low speed during the injection operation and at a high speed during driving on a general road or the like, but the injection of the high-pressure liquid from the nozzle is performed during the operation other than the injection operation. Not to be disturbed. (C) The operation of the pump is stopped when the liquid tank is empty to prevent the pump from running idle.

An object of claim 1 is to provide a high-pressure liquid injection vehicle capable of achieving (a) and (b). Claims 2 and 3
It is an object of the present invention to provide a high-pressure liquid injection vehicle capable of achieving (b) and (c). A third object of the present invention is to provide a high-pressure liquid injection vehicle that safely emptyes the liquid tank when the injection operation is completed. It is an object of the invention of claim 4 to provide a high-pressure liquid injection vehicle for safely emptying the liquid tank when the injection operation is completed.

[0006]

The present invention will be described with reference to the drawings corresponding to the embodiments. The high pressure liquid injection vehicle (10) according to the first aspect has the following components (a) to (e). (A) A nozzle device (70) in which a plurality of nozzles (72) for injecting a high-pressure liquid toward the ground (114) are arranged in the left-right direction. (B) The nozzle device (72) is communicated with the liquid tank (20). )
A pump (64) for pumping high-pressure liquid to a high-pressure liquid injection vehicle having (c) a vertically moving means (52) for vertically moving a nozzle device (70); Travel range switching means (42) for switching between the travel range for time and the travel range for travel for high-speed travel during travel (e) The pump (64) when the travel range switching means (42) is in the travel range for travel. Pump stop means (128) for stopping the operation

A high-pressure liquid injection vehicle (10) according to a second aspect has the following components (a) to (e). (A) A nozzle device (70) in which a plurality of nozzles (72) for injecting a high-pressure liquid toward the ground (114) are arranged in the left-right direction. (B) The nozzle device (72) is communicated with the liquid tank (20). )
A pump (64) for pumping high-pressure liquid to the pump, and (c) a low-pressure liquid injection vehicle equipped with a vertical movement means (52) for vertically moving the nozzle device (20). Travel range switching means (42) for switching between the travel range for time and the travel range for travel for high-speed travel during travel (e) When the travel range switching means (42) is in the travel range for travel or the liquid pump When the remaining amount of (64) becomes equal to or less than a predetermined value larger than zero, the pump stopping means (12)
8)

A high-pressure liquid injection vehicle (10) according to a third aspect has the following components (a) to (e). (A) A nozzle device (70) in which a plurality of nozzles (72) for injecting a high-pressure liquid toward the ground (114) are arranged in the left-right direction. (B) The nozzle device (72) is communicated with the liquid tank (20). )
(C) a vertical movement means (52) for vertically moving the nozzle device (70) (d) a low-speed traveling range during the injection operation and a high speed during the movement. Traveling range switching means (42) for switching between the traveling range for traveling and the traveling range (e) The pump stopping means (128) is operated in response to an instruction from an operator, and is operated by the vertical movement means (52). 70) is set to the lower position, the pump (64) is forcibly operated, the liquid tank (20) is emptied by the liquid jet from the nozzle (72), and then the pump (64) is turned on.
A controller (128) for stopping the operation of the nozzle device and returning the nozzle device (70) to the upper position by the vertical movement means (52)

According to a fourth aspect of the present invention, there is provided a high-pressure liquid injection vehicle (10) according to any one of the first to third aspects, which displays whether or not the pump (64) is operating. Machine (132).

[0010]

According to the first aspect of the present invention, when the nozzle device (70) is set at a position other than the lower position by the vertical movement means (52), or the travel range switching means (42). Is set as the traveling range for high-speed traveling, the pump stopping means (128) stops the pump (64). Thus, the injection of the high-pressure liquid from the nozzle device (70) is not performed.

In the high-pressure liquid injection vehicle (10) according to the second aspect, when the liquid in the liquid tank (20) approaches empty, the pump stopping means (128) stops the pump (64). Thus, the injection of the high-pressure liquid from the nozzle device (70) is stopped.

According to a third aspect of the present invention, when the controller (128) is operated in response to an instruction from an operator, the vertical movement means (52) moves the nozzle device (70) to the lower position. Down to Next, the pump stop means (128) is operated, and the liquid in the liquid tank (20) is ejected from the nozzle (72). When the liquid tank (20) becomes empty, the pump (64) stops, and then the nozzle device (7)
0) is returned to the upper position by the vertical movement means (52).

[0013] In the high-pressure liquid injection vehicle (10) according to the fourth aspect, the display (132) informs the operator whether or not the pump (64) is operating.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 8 is a side view of the high-pressure liquid injection vehicle 10. One front wheel 12 and right and left rear wheels 14 are
Are provided at the center in the left-right direction of the front part and at the left and right sides of the rear part, and support the frame 16. In the upper part of the frame 16, a driver's seat 18, a liquid tank 20 for storing a fertilizer solution, a chemical solution, water, or the like, and an injector 24 are arranged in this order from the front. The rear bumper 26 extends rearward from the frame 16 so as to surround the injector 24 from the left and right sides and the rear of the injector 24 at substantially the same height as the frame 16.

FIG. 9 is a configuration diagram of a power system and the like of the high-pressure liquid injection vehicle 10. The driver's seat 18 includes a seat 2 on which the driver sits.
8, and a steering wheel 30 that is rotated to steer the high-pressure liquid injection vehicle 10 is provided, and the front wheels 12 are steered in conjunction with the rotation of the steering wheel 30. Hydraulic drive (HST) 34
Includes a hydraulic pump and a hydraulic motor,
2, the rotational power of the hydraulic drive unit 34 is transmitted to the left and right rear wheels 14 via the gear type transmission 36 and the differential unit 38. The main transmission lever 40 and the sub transmission lever 42 are disposed in the driver's seat 18, the main transmission lever 40 controls the output rotation speed and forward / backward movement of the hydraulic driving device 34, and the sub transmission lever 42 is connected to the gear type transmission 36. , The gear ratio of the gear type transmission 36 is controlled. Hydraulic drive 34 and oil tank 4
4 are connected to each other by a hydraulic circuit.
Is cooled by an oil cooler 48, foreign matter is filtered by a filter 46, and then returns to the oil tank 44. The switching valve 50 is connected to a hydraulic cylinder 52 of the injector 24 via an oil passage 51, and controls a hydraulic pressure sent from the hydraulic driving device 34 to the hydraulic cylinder 52. The rotational power of the work machine engine 60 is transmitted to the intermittent injection pump 64 via the electromagnetic clutch 62,
Sucks the liquid in the liquid tank 20 through the strainer 66. The high-pressure liquid discharged from the intermittent injection pump 64 passes through the high-pressure hose 68 to the nozzle pipe 7 of the injector 24.
It is led to 0.

The intermittent jet pump 64 is a reciprocating pump, and intermittently jets the liquid to the high pressure hose 68 by alternately repeating suction and discharge. In order to increase the discharge pressure, a non-circular gear meshing with the driving unit is provided in the drive unit, as in the reciprocating pump described in Japanese Patent Application No. 6-260462 and the drawings, so that the time of the discharge stroke is reduced by the suction stroke. It is advantageous to adopt a structure that shortens the time. When such an intermittent injection pump 64 is employed, an intermittent valve and an accumulator having a problem in abrasion resistance and chemical resistance in order to realize intermittent injection of a high-pressure liquid from a nozzle 72 (FIG. 2 and the like) described later. Can be abolished, so that a liquid containing fine particles, such as a fertilizer liquid or a control liquid, can be injected in addition to water to perform fertilization and control together with the air rate.

FIGS. 2, 3 and 4 each show an injector 24.
3 is a side view, a view of the injector 24 viewed from the rear, and a plan view. The nozzle pipe 70 extends linearly in the left-right direction, and the plurality of nozzles 72 face downward.
0 are attached at regular intervals in a line in the longitudinal direction. The left and right connection brackets 74 have the left and right ends of the nozzle pipe 70 attached to the front end, respectively. Packer roller 7
Numeral 8 extends in parallel with the nozzle pipe 70, and is supported at the left and right ends substantially at the center in the front-rear direction of the roller bracket 76 so as to be rotatable and not fall off.
The roller bracket 76 is fixed to the rear end of the connection bracket 74.

FIG. 6 is a perspective view showing a structure for attaching the protective plate 80 to the pressure reducing roller 78. 2 and 6, the protection plate 80 is provided with vertically extending long holes 82 at the left and right ends, and a bolt 84 is inserted into the long holes 82 and then screwed to the front end of the roller bracket 76. Then, the protection plate 80 is fixed to the roller bracket 76. By changing the position of the bolt 84 in the long hole 82, the protection plate 8
The height of 0 is appropriately adjusted. The protection plate 80 includes the nozzle 72
, And slides the turf 114 in front of the nozzle 72 while the high-pressure liquid injection vehicle 10 is running,
The nozzle 72 is protected from the lawn 114 or the like. Protective plate 80
Has a through hole at a portion facing the injection port of each nozzle 72,
The high-pressure liquid from each nozzle 72 passes through each through hole of the protection plate 80 and is sprayed onto the lawn 114.

In FIGS. 2 to 4, the scraper 86 is
At the rear side of the pressure reducing roller 78, it extends in the left-right direction along the pressure reducing roller 78, and is fixed to the rear end of the roller bracket 76 so that the height can be adjusted by an adjusting screw 87, and the leading end contacts the pressure reducing roller 78. The brush 88 extends parallel to the pressure reducing roller 78 further behind the scraper 86 and is fixed to the rear end of the roller bracket 76 at the left and right ends by adjusting screws 89 so that the height can be adjusted.
It is in contact with the lawn 114. The structure of adjusting the height of the scraper 86 and the brush 88 by the adjusting screws 87 and 89 is the same as that of the protective plate 80 by the bolt 84 in FIG.

The gate-shaped fixed frame 90 is fixed to the rear end of the frame 16 in an upright state. The vertical moving frame 92 has vertical sides 94 on the left and right. Is supported by the fixed frame 90 so as to be movable up and down.
The hydraulic cylinder 52 extends in the vertical direction, and is coupled to a fixed frame 90 and a vertical moving frame 92 at upper and lower ends, respectively, and moves the vertical moving frame 92 up and down with respect to the fixed frame 90 by expansion and contraction. The left and right vertical posts 96 are disposed in parallel with the left and right vertical sides 94, and the upper and lower link rods 98 are connected to the vertical sides 94 and the vertical posts 96 via ball joints 108 described later.
And can be three-dimensionally displaced independently of each other and within a predetermined range with respect to the vertical movement frame 92. Upper and lower link rods 98
Together with the vertical side portion 94 and the vertical post 96 constitute a four-point parallel link device 100. Tension spring 1 as urging means
02, both ends are respectively locked to the intermediate portions of the vertical movement frame 92 and the upper link rod 98 to urge the vertical post 96 downward, and when the pressure-reducing roller 78 is floated from the ground 114, the left and right The nozzle pipe 70 and the pressure reduction roller 78 are automatically returned to the posture along the horizontal line in the horizontal direction by the balanced right and left urging force of the tension spring 102. The vertical post 96 is fixed to the connection bracket 74 at the lower end so as to be located at the position of the pressure reducing roller 78 in the front-rear direction.

In the illustrated embodiment, the tension spring 102 as the urging means is hung on the middle of the upper link rod 98 at the upper end, but may be hung on the upper end of the vertical post 96. , The vertical post 96 is urged downward with a predetermined urging force, and the nozzle pipe 7 is brought into a posture along a horizontal horizontal line when the pressure-reducing roller 78 is lifted off the ground 114.
Zero and automatic retraction of the compression roller 78 can be achieved.

The pulley 104 is rotatably attached to each of the right and left vertical sides 94 of the vertical moving frame 92, and has a wire 106.
Are locked at the lower ends of the right and left vertical sides of the fixed frame 90 and the connecting portion of the lower link rod 98 to the vertical post 96, and are raised at the center to pulley 10
Multiplied by four. Accordingly, the vertical post 96 generates a large displacement with respect to a small upward displacement of the vertical moving frame 92, and the pressing and releasing roller 78 and the like can be quickly contacted and separated.

FIG. 5 shows a structure of connecting both ends of the link rod 98 to the vertical side portion 94 and the vertical post 96 in the parallel link device 100. The link rod 98 is connected to the vertical side portion 94 and the vertical post 96 via ball joints 108 at front and rear ends, respectively. FIG. 5 shows only the connecting structure of the front and rear ends of the link bar 98 at the upper left end, but the front and rear ends of the other three link bars 98 also
5 is connected to the vertical side portion 94 and the vertical post 96 by a ball joint 108. Thus, the left and right vertical posts 96 can be three-dimensionally displaced independently of each other and within a predetermined range with respect to the vertical side portion 94. An elastic member (not shown) such as a coil spring is disposed between the vertical post 96 and the vertical member 94 so as to urge the vertical post 96 downward.

FIG. 7 is a view showing the inclined state of the pressure reducing roller 78 as viewed from the rear. With the parallel link device 100 having the ball joint 108 at the node, the left and right vertical posts 96 are relatively vertically movable and tilt with respect to the vertical line.
As a result, when the bulge 116 exists on the lawn 114 and the pressure-reducing roller 78 rides on the bulge 116 at one end in the left-right direction, the height of the left and right vertical posts 96 and the inclination angle with respect to the vertical line are reduced. As a result, the nozzle 72 and the pressure reduction roller 78 are inclined at an appropriate angle with respect to the horizontal line in the left-right direction regardless of the unevenness existing on the left and right.

The high-pressure liquid injection operation by the high-pressure liquid injection vehicle 10 will be described. In the operation of intermittently injecting the liquid into the lawn 114, the hydraulic cylinder 52 is extended by switching the hydraulic pressure at the switching valve 50. As a result, the vertical moving frame 92 moves down with respect to the fixed frame 90, and the pressure reduction roller 78 comes into contact with the lawn 114. Next, as the high-pressure liquid injection vehicle 10 travels forward, liquid such as fertilizer liquid is intermittently pumped from the intermittent injection pump 64 to each nozzle 72 via the high-pressure hose 68, and the high-pressure liquid is supplied from the nozzle 72 toward the ground. Is injected.
The guard plate 80 covers the front and the bottom of the row of the nozzles 72 during running, and prevents a protrusion such as a stone on the lawn 114 from colliding with the nozzles 72 and damaging the nozzles 72. The protection plate 80 has at least a portion corresponding to the nozzle of the nozzle 72 as a through-hole, and the high-pressure liquid intermittently injected from the nozzle 72 penetrates through the horizontal surface of the protection plate 80 and the lawn 114.
Into the turf 114 and into the turf 1
Make a vertical aeration hole to 14. Packer roller 78
The turf 114 is pressed against the turf 114 by its own weight and the urging force of the tension spring 102 via the vertical post 96, and rolls the turf 114, and rises with the injection of the high-pressure liquid into the turf 114. At the rear of the nozzle 72. The scraper 86 rubs the tip against the pressure reduction roller 78 to remove mud and the like adhering to the pressure reduction roller 78.
Peeled off. The brush 88 brushes the lawn 114 after the pressure reduction by the pressure reduction roller 78.

The lawn 114 usually has a height difference in the running direction of the high-pressure liquid injection vehicle 10, and the distance between the rear wheel 14, the nozzle 72, and the pressure-reducing roller 78 in the vertical direction is successive during the operation of the high-pressure liquid injection vehicle 10. Change. The left and right vertical posts 96
The vertical side 9 of the vertical moving frame 92 by the parallel link device 100
The vertical side 9 of the vertical moving frame 92 is independently left and right by being connected to
4, the pressure-reducing roller 78 is displaced in the vertical direction relative to
Regardless of the distance between the rear wheel 14 and the nozzle 72 and the pressure reduction roller 78 in the vertical direction, the ground contact state with the lawn 114 is maintained with an appropriate weight due to its own weight and the urging force of the tension spring 102.

As shown in FIG. 7, when there is a difference in height between the right and left due to the protrusion 116, the vertical post 96 on the riding side is raised by the pushing force from the protrusion 116 to the pressure reduction roller 78. The pressure reducing roller 78 receives a tilting force with respect to the directional horizontal line. This tilting force is transmitted to the left and right and up and down link bars 98 via the left and right vertical posts 96,
Rotation occurs at the ball joints 108 at the front and rear ends of the link rods 98, and the left and right vertical posts 96 are inclined with respect to the horizontal line in the left and right direction integrally with the pressure reduction roller 78. The crushing roller 78 has a raised portion 11.
Tilt the end on the 6 side so that it is higher than the non-raised side.

High pressure liquid injection vehicle 1 except during high pressure liquid injection
When the vehicle travels 0, the hydraulic cylinder 52 is reduced by switching the hydraulic pressure at the switching valve 50. As a result, the vertical movement frame 92 rises, and the roller bracket 76 rises. Further, as the vertical moving frame 92 rises, the wire 106 is displaced toward the fixed frame 90 through the pulley 104, and the link rod 9
8 swings the vertical post 96 side upward with respect to the vertical side portion 94 side. As the pressure reduction roller 78 floats from the ground 114, the pressure reduction roller 78
The tilting power to the left and right vertical posts 96 are
Since the left and right tension springs 102 are not only biased downward but also evenly biased to the center in the left and right direction, equal forces act on the ball joint 108 from the left and right vertical posts 96, The vertical posts 96 have the same height as each other, and the nozzle pipe 70 and the pressure reduction roller 78 return to the posture along the horizontal horizontal line. At the final upper position of the vertical movement frame 92, all of the nozzle 72 and the pressure-reducing roller 78, which are assembled below the connection bracket 74, are formed by a straight line connecting the left-right horizontal portion of the rear bumper 26 and the rear wheel 14. It is on the upper side. As a result, while the high-pressure liquid injection vehicle 10 is traveling, the nozzle 72, the pressure reduction roller 78, the protection plate 80, and the like are surrounded by the rear bumper 26 from the outside, so that collision with obstacles on the road surface is avoided, and A direct collision with the road surface is avoided at the start of climbing and at the end of descending slopes.

FIG. 1 is a configuration diagram of a control device for the hydraulic cylinder 52 and the intermittent injection pump 64. Lower position detecting means 1
A vertical moving frame 92 is attached to the fixed frame 90 and moves up and down with respect to the fixed frame 90 by the expansion and contraction of the hydraulic cylinder 52.
Is detected by contact with the vertical movement frame 92 as to whether or not is in the lower position. The low speed position detecting means 122 is provided with
2 low speed position and high speed position. In the injection work,
Since the high-pressure liquid injection vehicle 10 needs to be run at a sufficiently low speed, the auxiliary transmission lever 42 is switched to a low-speed position as a travel range for injection work. In addition, when traveling on a general road to move between the spraying location and the storage location of the high-pressure liquid injection vehicle 10, it is necessary to drive the high-pressure liquid injection vehicle 10 at a sufficiently high speed. It is switched to a high-speed position as a traveling range for movement. The liquid level switch 124 detects whether or not the liquid in the liquid tank 20 has dropped below a liquid level that is greater than zero and very close to zero. The residual liquid discharge switch 126 is manually operated by the driver of the high-pressure liquid injection vehicle 10 when the liquid is completely drained from the liquid tank 20. The controller 128 controls the lower position detecting means 12.
0, receives inputs from the low-speed position detecting means 122, the liquid level switch 124, and the residual liquid discharging switch 126, and controls the electromagnetic clutch 62, the actuator 130, and the display, that is, the pump operation display lamp 132. The actuator 130 controls expansion and contraction of the hydraulic cylinder 52 through switching of the switching valve 50. The pump operation indicator lamp 132 is disposed in the driver's seat 18 and illuminates that the electromagnetic clutch 62 is on, that is, that the intermittent injection pump 64 is operating.

In the operation of injecting the high-pressure liquid into the ground 114,
(A) In order to make the high-pressure liquid injection vehicle 10 run at a low speed, the sub-transmission lever 42 is switched to the low-speed position. It is lowered by the operation of the hydraulic cylinder 52 due to the extension, so that the hydraulic cylinder 52 is at the lower position. (C) In order to prevent the intermittent injection pump 64 from running idle, the liquid to be injected from the nozzle 72 must be present in the liquid tank 20, and the liquid level in the liquid tank 20 must be equal to or higher than a predetermined value.
The controller 128 determines the conditions (a) to (c) from the inputs from the lower position detecting means 120, the low speed position detecting means 122, and the liquid level switch 124, respectively, and (a) to (c).
If any one of the above conditions is not satisfied, the electromagnetic clutch 62 is turned off, that is, the electromagnetic clutch 62 is turned off. As a result, the electromagnetic clutch 62 is disconnected, and the intermittent injection pump 6
No. 4 does not transmit the rotational power from the working machine engine 60, is stopped, and the high-pressure liquid is not injected from the nozzle 72.

If the liquid level in the liquid tank 20 drops during the injection operation in which the high-pressure liquid is ejected from the nozzle 72 and the condition (c) described above is no longer satisfied, the controller 12
8 not only shuts off the electromagnetic clutch 62 and stops the injection of the high-pressure liquid from the nozzle 72, but also switches the position of the switching valve 50 via the actuator 130 after the electromagnetic clutch 62 is turned off. To reduce
The vertical movement frame 92 is changed to the upper position.

Thereafter, when the driver of the high-pressure liquid injection vehicle 10 turns on the residual liquid discharging switch 126 to empty the liquid tank 20, the controller 128 controls the switching valve via the actuator 130. The position of 50 is switched, the hydraulic cylinder 52 is extended, and the vertical movement frame 92 is set to the lower position. When the lower position detecting means 120 detects that the lower position of the vertical movement frame 92 has been reached, the controller 128 activates a built-in timer, measures a predetermined time, and sets the liquid level switch 1.
The electromagnetic clutch 62 is energized for the predetermined time regardless of the input from the power supply 24. As a result, the intermittent injection pump 64 is driven for a predetermined time, and the liquid in the liquid tank 20 is discharged from the nozzle 72.
And the liquid tank 20 becomes completely empty. After that, the controller 128 switches the position of the switching valve 50 again via the actuator 130, the hydraulic cylinder 52 contracts, and the vertical movement frame 92 returns to the upper position.

[0033]

According to the first and second aspects of the present invention, when the travel range switching means is in the travel range for movement, the injection of the high-pressure liquid from the nozzle is not performed, so that the safety is improved. improves. Further, when the inside of the liquid tank approaches empty, the pump is automatically stopped, so that the pump can be prevented from running idle.

According to the third aspect of the present invention, in response to an instruction from the operator to empty the liquid tank, the nozzle device is automatically set to the lower position, and the liquid tank is emptied by ejecting the liquid from the nozzle. As a result, the liquid tank can be emptied safely at the end of the injection operation or the like.

According to the fourth aspect of the present invention, it is possible to know from the display whether or not the pump is operating irrespective of the surrounding mechanical noise, so that it is not necessary to directly look at the state of injection from the nozzle.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control device for a hydraulic cylinder and an intermittent injection pump.

FIG. 2 is a side view of the injector.

FIG. 3 is a rear view of the injector.

FIG. 4 is a plan view of the injector.

FIG. 5 is a diagram showing a connection structure at both ends of a link rod to a vertical side portion and a vertical post in the parallel link device.

FIG. 6 is a perspective view showing an attachment structure of a protection plate to a pressure reduction roller.

FIG. 7 is a view of the tilting state of the pressure reduction roller as viewed from the rear.

FIG. 8 is a side view of the high-pressure liquid injection vehicle.

FIG. 9 is a configuration diagram of a power system and the like of a high-pressure liquid injection vehicle.

[Explanation of symbols]

Reference Signs List 10 high-pressure liquid injection vehicle 16 frame (vehicle body) 20 liquid tank 42 auxiliary speed change lever (running range switching means) 52 hydraulic cylinder (vertical movement means) 64 intermittent injection pump (pump) 70 nozzle pipe (nozzle device) 72 nozzle 114 ground 128 Controller (first pump stopping means, second pump stopping means, pump stopping means) 132 Pump operation display lamp (display)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-209602 (JP, A) JP-A-6-165608 (JP, A) JP-A-7-155005 (JP, A) 34405 (JP, U) Actually open 57-125279 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01B 35/00 A01B 45/00 A01M 17/00

Claims (4)

(57) [Claims] (A) A plurality of nozzles (72) for injecting a high-pressure liquid toward the ground (114) are arranged in the left-right direction.
Is a nozzle device comprising a (70), (b) communicates with the liquid tank (20) said nozzle (7
A pump (64) for pumping the high-pressure liquid to 2) ; and (c) a vertically moving hand for vertically moving the nozzle device (70).
In high-pressure injection vehicle and a stage (52), (d) driving range switching means for switching the injection operation for driving range for low speed in the injection operation and the moving time of traveling range for high-speed running of the moving ( 42) and ( e ) a high-pressure liquid having stop means (128) for stopping the pump (64) when the travel range switching means (42) is in the travel range for movement. Injection car. 2. A nozzle device (70) in which a plurality of nozzles (72) for injecting a high-pressure liquid toward the ground (114) are arranged in a horizontal direction, and (b) a liquid tank (20). And the nozzle (7
(C) a high-pressure liquid injection vehicle having a pump (64) for pumping high-pressure liquid to (2); and (c) a vertically moving means (52) for vertically moving the nozzle device (70). A traveling range switching means (42) for switching between a traveling range for injecting work for traveling and a traveling range for traveling for traveling at high speed ; and (e) traveling range switching means (42) for traveling during traveling. When in range or remaining in the liquid tank (20)
And a pump stopping means (128) for stopping the pump (64) when the pressure becomes equal to or less than a predetermined value larger than zero . 3. High pressure liquid toward the ground (114)
A plurality of nozzles (72) for injecting
Is a nozzle device (70) comprising, in communication with the (b) a liquid tank (20), said nozzle (7
A pump (64) for pumping the high-pressure liquid to 2) ; and (c) a vertically moving hand for vertically moving the nozzle device (70).
In high-pressure injection vehicle and a stage (52), (d) injection operation during traveling Ren for low speed in the injection operation
Switch between the driving range and the traveling range for high-speed traveling while moving
Travel range switching means (42) and has a to obtain the by (e) pumping stop means (128) operates in response to an instruction from the operator, the vertical motion means (52) Bruno
With the squeezing device (70) in the lower position, the pump (6)
4) forcibly actuate the liquid from the nozzle (72).
Emptying the liquid tank (20) by body injection,
The pump (64) stops moving,
The nozzle device (70) is moved to the upper position by the moving means (52).
3. The high-pressure liquid according to claim 1 or 2, wherein the high-pressure liquid includes returning to the position.
Injection car. 4. A pump (64) is a high pressure injection according to any one of claims 1 to 3, characterized in that it has a display (132) for displaying whether or not it is in operation car.