JP3510369B2 - Injection device and spraying self-propelled 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 spraying device and a spraying self-propelled vehicle used, for example, for lawn management.

[0002]

2. Description of the Related Art For managing lawns such as golf courses and ball games,
In order to exterminate pests and insects, there is a work of spraying a control liquid on a lawn by spraying, and a work of injecting water or a fertilizer liquid into soil at high pressure for aeration and growing grass. The former is suitable for continuous injection, while the latter is for intermittent injection.

In order to perform such two types of work, conventionally, an injection device and a spraying vehicle have been required for each injection type.

[0004]

It is disadvantageous in terms of cost, management, etc. to prepare an injector and a spraying vehicle for each type of injection.

It is an object of the inventions of claims 1 and 3 to provide an injection device and a spraying self-propelled vehicle capable of realizing both continuous injection and intermittent injection by a common reciprocating pump device. It is an object of the invention of claim 2 to further provide an injection device in which continuous injection from a continuous injection nozzle is improved.

[0006]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. In the injection device according to claim 1, the reciprocating pump device (20) comprises a plurality of reciprocating members (126) reciprocating by driving a common crankshaft (102) at different phases, and each reciprocating member (126). It is provided with a pump chamber (124) that is provided correspondingly and whose volume is increased or decreased by the reciprocating motion of each reciprocating member (126), and a discharge port (120) provided corresponding to each pump chamber (124). Each outlet (120) is a switching valve (56)
Thus, it is possible to switch to each intermittent injection nozzle (46) or common continuous injection nozzle (54, 76).

According to a second aspect of the present invention, in addition to the first aspect, the accumulator (66) further comprises a switching valve.
It is connected to the confluence (60) between the nozzle (56) and the continuous jet nozzle (54, 76).

A spraying self-propelled vehicle (10) according to claim 3 is equipped with the injection device according to claim 1 or 2. The intermittent injection nozzle (46) is for injecting the liquid (30) into the ground (50), and the continuous injection nozzle (54,
76) are respectively arranged for spraying the liquid (30) on the ground (48).

[0009]

In the injection device of claim 1, the reciprocating pump device (20)
The respective reciprocating members (126) reciprocate in different phases with the rotation of the crankshaft (102) to increase or decrease the volume of each pump chamber (124). In this way, the liquid (30) is ejected to each ejection port (120) in different phases. At the discharge port (120) connected to the intermittent injection nozzle (46) by the switching valve (56), the liquid (30) discharged intermittently to the discharge port (120) remains as it is, that is, the fluid pressure is smoothed. It is transmitted to the intermittent injection nozzle (46) without being converted, whereby intermittent injection is performed from the intermittent injection nozzle (46). On the other hand, all or 2
When more than one discharge port (120) is connected to the common continuous injection nozzle (54, 76) by the corresponding switching valve (56), the liquid discharged intermittently from each discharge port (120). (30)
Are merged and the hydraulic pressures are combined, whereby the continuous injection nozzles (54, 76) are constantly supplied with the liquid (30) having a predetermined pressure and continuously eject the liquid (30).

In the injection device of claim 2, the accumulator
(66) smoothes the liquid pressure in the confluence portion (60), whereby the liquid pressure of the liquid (30) reaching the continuous injection nozzles (54, 76) is further smoothed, and the liquid (30) is Further, the continuity is enhanced, and the liquid is ejected from the continuous ejection nozzles (54, 76).

The spraying self-propelled vehicle (10) according to claim 3 performs the injection work while traveling in the work area. The liquid (30) from the intermittent jet nozzle (46) is injected into the ground (50). Nozzle for continuous injection
Liquid (30) from (54,76) is sprayed onto the ground (48).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a main part of a self-propelled vehicle 10 for lawn management. The lawn management self-propelled vehicle 10 is designed to be self-propelled by driving an unillustrated HST (hydraulic drive device) by the engine 12 and driving the rear wheels by the HST. The engine 12 is operated by supplying electric power from a battery 14 to an ignition device (cell motor) 18 via an engine switch 16 on the driver's seat. The triple plunger device 20 has its crankshaft
Rotational power from the engine 12 is transmitted to the engine 102 via the V-belt 22 and the electromagnetic clutch 24, and the switch 26 is arranged in the driver's seat and connects and disconnects the electromagnetic clutch 24 by energization control.

The tank 28 is mounted on the lawn management vehicle 10 and stores a spray liquid 30 such as water, a control liquid, or a fertilizer liquid. The operation of the stirrer 32 is controlled by the switch 34 on the driver's seat and stirs the spray liquid 30 in the tank 28. The suction pipe line 36 connects the bottom of the tank 28 to the suction port 118 of the triple plunger device 20.
Connect to. The strainer 40 is interposed in the suction pipe line 36, and the spray liquid 30 is sent from the tank 28 to the triple plunger device 20.
Is filtered. The drain cock 42 branches off from the suction pipe 36 on the tank 28 side of the strainer 40 and is opened when the spray liquid 30 in the tank 28 is discharged.

The number of intermittent injection nozzle pipes 44 is equal to the number of the discharge ports 120 of the triple plunger device 20, that is, three, and the nozzle pipes 44 are arranged in a row in the left-right direction of the lawn management vehicle 10. It On each of the intermittent injection nozzle pipes 44, a plurality of intermittent injection nozzles 46 are attached in a row at equal intervals with the direction facing down. Nozzle pipe for intermittent injection 44
Is vertically movable by an up-and-down moving mechanism (not shown), and when the spray liquid 30 is jetted from the intermittent jet nozzle 46, the intermittent jet nozzle 46 is sufficiently lowered so as to come close enough to the lawn 48. To be taken care of. The spray liquid 30 sprayed from the intermittent spray nozzle 46 penetrates the lawn 48 and is injected into the soil 50 below the lawn 48, while forming a through hole having a predetermined depth in the soil 50.

The three continuous injection nozzle pipes 52 are connected to each other in a row parallel to the row of the intermittent injection nozzle pipes 44 at a position different from the row of the intermittent injection nozzle pipes 44 in the front-rear direction. Has been done. A plurality of continuous jet nozzles 54 are attached to each of the continuous jet nozzle pipes 52 in a row at equal intervals with the direction facing downward. The continuous jet nozzle pipe 52 has a height appropriately separated from the lawn 48 so that the sprayed spray liquid 30 from the continuous jet nozzle 54 is uniformly sprayed to the lawn 48.

The switching valve 56 is provided corresponding to each discharge port 120 of the triple plunger device 20, and each switching valve 56 has its inlet port connected to the corresponding discharge port 120 and one outlet port It is connected to each intermittent injection nozzle pipe 44 via an individual high pressure hose 58, and the other outlet side port is an individual spray hose.
It is connected via 59 to a liquid collection pipe 60 common to each switching valve 56.
The continuous injection pipe line 62 is connected to the liquid collection pipe 60 and the opening / closing cock 64 on the upstream side and the downstream side, respectively, and the accumulator 66 and the pressure regulating valve 68 are connected to the continuous injection pipe line 62 in the upstream side and the downstream side, respectively. It is provided in. The accumulator 66 smoothes the hydraulic pressure in the continuous injection conduit 62, the pressure regulating valve 68 adjusts the hydraulic pressure in the continuous injection conduit 62 to a constant value, and the excess spray liquid 30 is passed through the residual liquid hose 70. Return to tank 28. The opening / closing cock 72 is
The connection between the location of the continuous injection pipe line 62 on the downstream side of the pressure regulating valve 68 and the spray hose 74 is controlled. The spray liquid 30 sent via the spray is sprayed on the lawn 48. The common spray hose 78 connects the opening / closing cock 64 and the distribution pipe 80,
Is configured to distribute the spray liquid 30 sent through the common spray hose 78 to each continuous injection nozzle pipe 52, and each opening / closing cock 82 is distributed from the distribution pipe 80 to each continuous injection nozzle pipe 52. The supply of the spray liquid 30 of is controlled.

2 and 3 are a vertical sectional view and a plan view of the triple plunger device 20, respectively. The crankshaft 102 is rotatably supported, with both ends protruding from both side walls of the crankcase body 105 of the crankcase 104. The cap 106 is provided on the upper surface of the crankcase body 105, and opens and closes the oil supply port for supplying oil to the crankcase 104. The cover plate 108 closes the opening on the base end side of the crankcase body 105, and is fixed to the crankcase body 105 by a plurality of bolts 110. Oil gauge 112 is lid plate 108
The drain plug 114 is provided in the center of the cover plate 108 and opens and closes the drain hole in the lower part of the cover plate 108.

The pump manifold 116 is joined to the front end side of the crankcase body 105 by a plurality of tightening bolts 117, and has one suction port 118 on the lower surface and three discharge ports 120 on the upper end surface. Are provided in a row in the horizontal direction, and three pump chambers 124 are defined inside. The communication hole 122 is formed in the pump manifold 116 in parallel with the crankshaft 102 and connects the suction port 118 to each pump chamber 124.
Communicate with. The three plungers 126 guide the crankcase body 105 at the proximal crosshead 128.
And is guided in the axial direction. 3 connecting rods 13
2 is fitted to each eccentric circular portion of the crankshaft 102 on the base end side and is rotatably connected to the crosshead 128 of the corresponding plunger 126 on the tip end side, and the rotation of the crankshaft 102 is reciprocated to the plunger 126. Convert. The center of each eccentric circular portion of the crankshaft 102 is 1 around the centerline of the crankshaft 102.
The intervals are 20 °, which results in the plunger 126
Are sequentially reciprocated with a phase difference of 120 °.

The oil seal 134 is fitted into the step portion in the guide 130, and is pressed and fixed by the oil seal retainer 136.
The inner peripheral side is in sliding contact with the peripheral part of the plunger 126 to prevent oil from leaking from the crankcase 104. In addition,
A through hole (not shown) is formed in the cross head 128, and the space between the cross head 128 and the oil seal 134 communicates with the connecting rod 132. Seal packing 140
Is pressed by the V packing presser 144 and the seal packing presser 138 from the front end side and the base end side in the axial direction, and is slidably contacted with the peripheral portion of the plunger 126 on the inner peripheral side to prevent the spray liquid 30 from leaking from the front end side. . The V-packing 142 is axially pressed by the V-packing retainer 144 and slidably contacts the peripheral portion of the tip end portion of the plunger 126 on the inner peripheral side to prevent the spray liquid 30 from leaking from the pump chamber 124. The suction valve 146 is provided on the suction side of each pump chamber 124 and extends from the communication hole 122 to the pump chamber 12.
Allow the unidirectional flow of spray liquid 30 to 4. Discharge valve 148
Is provided on the discharge side of each pump chamber 124 and allows the unidirectional flow of the spray liquid 30 from the pump chamber 124 to the discharge port 120.
The intake valve 146 and the discharge valve 148 are fitted and inserted into the pump manifold 116, and are prevented from coming off by the plugs 150 and 152.

The operation of the lawn management vehicle 10 will be described. The self-propelled vehicle 10 for lawn management, while traveling on a lawn 48 such as a fairway of a golf course, performs an operation of injecting the spray liquid 30 onto the soil 50 and spraying the spray liquid 30 onto the lawn 48. The spray liquid 30 put into the tank 28 is selected according to the work, such as water, a control liquid, and a fertilizer liquid. When using the swivel gun 76, the worker stops the lawn management vehicle 10 and sets the lawn management vehicle 10.
From there, the spray hose 74 is extended, and the spray gun 30 is carried while walking, and the spray liquid 30 is sprayed to a predetermined spray area.

In the triple-type plunger device 20, the three plungers 126 are sequentially moved by 1 as the crankshaft 102 rotates.
Reciprocates with a phase difference of 20 °, and each pump chamber 12
Increase or decrease the volume of 4. In this way, the spray liquid 30 is sequentially discharged from each pump chamber 124 to each discharge port 120 with a phase difference of 120 °. FIG. 4 shows the rotation angle of the crankshaft 102 and each discharge port 1
The relationship with the hydraulic pressure of 20 is shown.

When injecting the spray liquid 30 such as water or fertilizer liquid into the soil 50 as in the case of injecting the air rate or the fertilizer liquid, the discharge ports 120 of all the switching valves 56 are individually connected to the high pressure hose. Connect to 58. The spray liquid 30 intermittently discharged from the triple-type plunger device 20 to each discharge port 120 passes through each individual high pressure hose 58 and reaches each intermittent injection nozzle 46 of each intermittent injection nozzle pipe 44. Spray liquid 30 from each outlet 120
The pulsation is not changed on the way, and the intermittent injection nozzle 46 of each intermittent injection nozzle pipe 44 remains in the state of FIG.
And the high pressure is injected from the intermittent injection nozzle 46 to the lawn 48. The sprayed spray liquid 30 penetrates the lawn 48 and is injected into the soil 50 to form a hole having a predetermined depth, which contributes to the air rate of the lawn 48.

When spraying the spraying liquid 30 such as the spraying liquid on the surface of the lawn 48, as in the case of spraying the spraying liquid, the discharge ports 120 of all the switching valves 56 are connected to the individual spray hoses 59.
Connect to. From the triple plunger device 20 to each outlet 120
The spray liquid 30 which is intermittently discharged to each individual spray hose 59
Is sent to a common liquid collection pipe 60, merges in the liquid collection pipe 60, and is guided to the continuous injection conduit 62. FIG. 5 shows the hydraulic pressure in the continuous injection conduit 62 when the accumulator 66 is not connected to the continuous injection conduit 62. Three hydraulic pressure waveforms (dashed lines), which are sequentially provided with a phase difference of 120 °, are synthesized so that the minimum value has an appropriate magnitude, and the hydraulic pressure has a small waviness, that is, an appropriately smoothed hydraulic pressure. (Solid line). Further, since the accumulator 66 is connected to the continuous injection conduit 62, the hydraulic pressure in the continuous injection conduit 62 is further smoothed as compared with the waveform in FIG. When the opening / closing cocks 64, 72 are opened and closed, respectively, the smoothed liquid pressure spray liquid 30 in the continuous injection pipe line 62 is sent to the distribution pipe 80 via the common spray hose 78, and further, Through the open / close cock 82, the nozzle pipe 52 for continuous injection is reached. The continuous jet nozzle 54 of each continuous jet nozzle pipe 52 is held at a height appropriately separated from the lawn 48, and the spray liquid 30 continuously supplied through the continuous jet nozzle pipe 52. Is sprayed downward, and the sprayed spray liquid 30 is deposited on the lawn 48. The spray width and the horizontal spray area of the spray liquid 30 from the continuous jet nozzle 54 can be adjusted by individually opening and closing the open / close cock 82. Further, when the opening / closing cocks 64, 72 are closed and open, respectively, the sprayed liquid of the smoothed hydraulic pressure in the continuous injection line 62 is sprayed.
30 reaches the flexible gun 76 carried by the operator through the spray hose 74, and is sprayed from the injection hole at the tip of the flexible gun 76,
It is sprayed on the lawn 48.

The switching positions of all the switching valves 56 are not the same, but in a predetermined switching valve 56, the discharge port 120 is connected to the individual high pressure hose 5.
8 to connect the discharge port 120 to the liquid collecting pipe 60 in the remaining switching valve 56, so that intermittent injection from the intermittent injection nozzle 46 and continuous injection from the continuous injection nozzle 54 are performed in parallel, It is also possible to do so. In this case, the intermittent injection is stopped at the intermittent injection nozzle 46 which is not connected to the discharge port 120. Further, in the continuous injection pipe line 62, since the spray liquid 30 is not supplied from some of the discharge ports 120, the change in hydraulic pressure increases, but this change in hydraulic pressure is absorbed by the accumulator 66. The triple plunger device 20 is triple, but in the case of a multiple reciprocating pump device having many pump chambers, even if some of the discharge ports 120 are connected to the individual high pressure hose 58 side, they are connected to the liquid collection pipe 60. The combined pressure of the liquid pressures from the discharge ports 120 is smoothed, and the influence on the continuity of the spray of the spray liquid 30 from the continuous spray nozzle 54 is reduced. The positions of the row of the intermittent injection nozzle pipes 44 and the row of the continuous injection nozzle pipes 52 are different from each other in the front-back direction, and each intermittent injection nozzle pipe 44 and each continuous injection nozzle pipe 52.
And the same position in the left-right direction, if the spray liquid 30 is continuously jetted from the continuous jet nozzle pipe 52 corresponding to the intermittent jet nozzle pipe 44 that intermittently jets the spray liquid 30, continuous jetting and intermittent jetting in the same region. It is also possible to carry out the injection simultaneously.

In the embodiment, the triple plunger device 20 is adopted as the reciprocating pump device, but as the reciprocating pump device, not less than four plunger devices can be adopted and the piston pump device can also be adopted. Is. The embodiment is the lawn management self-propelled vehicle 10, the injection device of the present invention, the intermittent injection is for the removal of local stubborn dirt,
Further, the continuous spray can be applied to a cleaning device used to wash off general dirt.

[0026]

According to the first and third aspects of the present invention, the discharge port provided for each pump chamber of the reciprocating pump device is connected to each intermittent injection nozzle and common continuous injection nozzle by a switching valve. As a result, it can be used for both intermittent injection and continuous injection, and it is possible to prevent the complexity of preparing an injector and a spray-propelled vehicle for each type of injection as in the conventional case.

According to the invention of claim 2, the accumulator comprises:
Since the continuous jet nozzle is connected to the merging portion that sends the liquid to the continuous jet nozzle, the continuous jet nozzle can be supplied with a liquid having a further smoothed predetermined pressure to improve the continuous jet from the continuous jet nozzle.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a lawn management vehicle.

FIG. 2 is a vertical sectional view of a triple plunger device.

FIG. 3 is a plan view of a triple plunger device.

FIG. 4 shows the relationship between the rotation angle of the crankshaft and the hydraulic pressure of each discharge port.

FIG. 5 is a hydraulic pressure of the continuous injection pipe when the accumulator is not connected to the continuous injection pipe.

[Explanation of symbols]

10 Lawn management self-propelled vehicle (scattering self-propelled vehicle) 20 Triple plunger device (reciprocating pump device) 30 Spray liquid (liquid) 46 Intermittent injection nozzle 48 Lawn (ground) 50 soil (underground) 54 Continuous injection nozzle 56 switching valve 60 Liquid collection tube (merging section) 66 Accumulator 76 Universal Gun (Nozzle for Continuous Injection) 102 crankshaft 120 outlets 124 pump room 126 Plunger (reciprocating member)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-181612 (JP, A) JP-A-6-181613 (JP, A) JP-A-6-209625 (JP, A) JP-A-6- 70604 (JP, A) JP-A-6-46484 (JP, A) JP-A-6-45474 (JP, A) JP-A-6-21768 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 41/00 A01B 45/02 A01M 7/00 B05B 1/20 101 B05B 17/00 101

Claims (3)

(57) [Claims] 1. A reciprocating pump device (20) corresponding to a plurality of reciprocating members (126) reciprocating by driving a common crankshaft (102) in different phases, and each reciprocating member (126). Each of the discharge ports (120) is provided with a pump chamber (124) whose volume is increased or decreased by the reciprocating motion of each reciprocating member (126) and a discharge port (120) provided corresponding to each pump chamber (124). ) Is the smoothing means
Nozzles for intermittent injection separated from each other without going through
Is separately connected to (46), and each outlet (120) each
Each switching valve (56) provided between the nozzle (46) for intermittent injection
Through the merging portion (60) , through a common continuous injection nozzle (54,
76) , and the connection destination by the switching valve (56) is each intermittent injection nozzle (46) or common continuous injection nozzle (5
An injection device characterized by being switchable between 4,76). Wherein the accumulator (66) is, before Kigo flow section (60)
The injection device according to claim 1, wherein the injection device is connected to the injection device. 3. The liquid ejecting apparatus according to claim 1 or 2, wherein the intermittent injecting nozzle (46) is a liquid (30) into the ground (50).
The continuous injection nozzles (54, 76) are attached to the ground (48) for the injection of
Dispersing self-propelled vehicles, characterized in that they are arranged respectively for spraying liquid (30) on them.