JP5070645B2 - Ambulatory sprayer - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a walking sprayer that travels between furrows and sprays a liquid such as a chemical solution on a farm field.

  As a conventional walking sprayer, a chemical spray vehicle described in Patent Document 1 is exemplified. As shown in FIG. 8, the chemical spray vehicle 50 includes a vehicle body 52, a front wheel 53, a rear wheel (not shown), a handle 55 attached to the rear part of the vehicle body 52, and a chemical spray nozzle unit device attached to the front part of the vehicle body 52. 56, a chemical supply hose 57 is provided. A chemical tank 58 is formed at the center of the vehicle body 52, and a pump (not shown) for sucking and discharging the chemical liquid in the chemical tank 58 and a motor for driving the pump (not shown) are mounted at the rear of the vehicle body 52. is doing.

JP 2002-34423 A

  However, when the conventional chemical solution spray wheel 50 is changed over at a narrow end, the operator lifts the front wheel side or the rear wheel side so that only one of the rear wheel or the front wheel 53 is grounded. It is necessary to move the entire machine by a plurality of workers, and there is a problem that the burden on the worker is very large.

In order to solve the above problems, the walking sprayer according to the first invention is:
An airframe, a main wheel provided at a front portion of the airframe and traveling between the furrows, and one or more auxiliary wheels supported by the airframe and traveling in another furrow different from the furrow where the main wheel travels. A walking sprayer comprising a handle protruding rearward from the aircraft and a spray device mounted on the aircraft;
All the auxiliary wheels are movable between a use position at which they can contact the ground and a retreat position retracted to a position relatively higher than the use position, and at each of the use position and the retreat position. It is configured to be position-fixable,
The position of the center of gravity when all the auxiliary wheels are moved to the retracted position is positioned relatively forward and relatively to the main wheel side with respect to the position of the center of gravity when all the auxiliary wheels are moved to the use position. Is configured to do.

  According to this configuration, the center-of-gravity position in a state where all the auxiliary wheels have moved to the retracted position and can travel only with the main wheel is the center-of-gravity position in a state in which all the auxiliary wheels have moved to the use position. Since it is configured to be relatively forward and relatively located on the main wheel side, the burden on the operator having the handle is reduced in a state where the vehicle can run only with the main wheel, thereby Improved maneuverability. Therefore, it is possible to reduce the burden of work when the vehicle is allowed to travel only with the main wheel in order to turn the aircraft in a narrow place.

As the walking sprayer of the second invention, in the first invention,
At least some of the auxiliary wheels are supported by the airframe via a rotation member that is pivotally supported so as to be rotatable substantially forward and backward with respect to the airframe.
The rotation member has a position in which the auxiliary wheel is positioned substantially below the rotation axis of the rotation member in a side view, and the auxiliary wheel is substantially forward with respect to the rotation axis. The aspect comprised so that it may rotate between the said retracted positions by being located in is illustrated.

  Here, “at least a part of the auxiliary wheels” means one auxiliary wheel when the walking sprayer includes only one auxiliary wheel.

  According to this configuration, the walking sprayer of the first invention can be realized with a simple configuration.

As the walking sprayer of the third invention, in the first or second invention,
An example in which the rotating member is provided with a spray nozzle portion for spraying the gap between the auxiliary wheels is illustrated.

  According to this configuration, the amount of forward movement of the center of gravity of the machine can be further increased.

  According to the walking sprayer according to the present invention, there is an excellent effect that it is possible to reduce the burden of the turning operation of the airframe in a narrow place.

  FIGS. 1-7 has shown the chemical | medical solution sprayer 1 as a walking type sprayer of one Embodiment which actualized this invention. This chemical spraying machine 1 is provided with a body 2, a main wheel 3 that is provided at the front of the body 2, and travels through the gap W, and a pair that is provided at the rear of the body 2 and travels through the same gap W as the main wheel 3 Auxiliary wheels 4, 4, and supporting wheels 5, 5 that run on both adjacent gaps W as other gaps W that are supported by the body 2 and that are different from the gaps W on which the main wheel 3 travels, and rear from the body 2 And a spray device 7 mounted on the airframe 2, and an engine 8 as a prime mover for driving the spray device 7 and the main wheel 3. In each figure, the arrow F indicates the front side of the aircraft.

  The auxiliary wheel 4 at the rear part of the machine body 2 is supported by the machine body 2 via a rotating member 10, and is in a position relative to the use position P1 (see FIGS. 1 to 3) that can contact the ground and the use position P1. In particular, it is configured to be movable between a retracted position P2 (see FIGS. 5 and 6) retracted to a high position, and to be fixed at each of the use position P1 and the retracted position P2. The rotating member 10 supports the auxiliary wheel 4 so as to be rotatable between a use position P1 and a retracted position P2 around a shaft 10a provided at a higher position than the auxiliary wheel 4 in a side view. It is configured as follows. In this example, when the operator grips the grip lever 6a provided on the handle 6, the position of the rotating member 10 is released, and when the grip lever 6a is released, the position of the rotating member 10 is fixed. It has become.

  The left and right auxiliary wheels 5 are supported on the body 2 via a rotating member 13 constituted by a lateral arm 11 extending in the left-right direction of the body 2 and a longitudinal arm 12 provided on each side of the lateral arm 11. Between the use position P1 (see FIGS. 1 to 3) that can be grounded to the ground and the retreat position P2 (see FIGS. 5 and 6) retreated to a position relatively higher than the use position P1. And can be fixed at each of the use position P1 and the retracted position P2. The rotation shaft 13 a of the rotation member 13 is provided at a position higher than the auxiliary wheel 5 in a side view, and the vertical arm 12 of the rotation member 13 supports a rotation of the auxiliary wheel 5 at the rear of the machine body 2. The moving member 10 is longer than the moving member 10 and is configured to rotate about a rotation shaft 13a and to support the auxiliary wheel 5 so as to be rotatable between a use position P1 and a retracted position P2. ing. In this example, the position at which the rotation member 13 rotates forward and the front end side extends substantially forward is set as the retracted position P2, and thereby the retracted position P2 is relatively less than the use position P1. It is configured to be in front of. In this example, the link 15 includes a middle portion in the length direction of a turning lever 16 provided on the right side of the body 2 so as to be able to turn back and forth, and a turning piece 11 a protruding in the radial direction of the lateral arm 11. When the pivot lever 16 is tilted forward, the auxiliary wheel 5 is in the use position P1, and when the pivot lever 16 is tilted backward, the auxiliary wheel 5 is retracted P2. It is configured to be. The rotation lever 16 is configured to be locked at a position where it is tilted forward and a position where it is tilted backward by a lock mechanism (not shown). The fixing position of the vertical arm 12 in the axial length direction of the horizontal arm 11 is configured to be adjustable according to the width of the flange U.

  The spraying device 7 includes a chemical liquid tank 21, a chemical liquid pump 22 for sucking and discharging the chemical liquid in the chemical liquid tank 21, and a spray nozzle portion 24 connected to the chemical liquid pump 22 via a chemical liquid hose 23. The chemical pump 22 is driven by the engine 8. The medicinal solution spraying machine 1 of this example is for spraying medicinal solution to the intercostal space W, and a spray nozzle part 24 is provided on the rotating member 13 that supports the rear part of the machine body 2 and the left and right auxiliary wheels 5. In addition, a hand-held spray nozzle portion 25 is provided on the handle 6. Each spray nozzle portion 24 is equipped with a cover 24a and is disposed in the vicinity of the surface of the intercostal space W in order to prevent the spray from spreading to places other than the intercostal space W that is a target to be sprayed with a chemical solution. The spray nozzle portion 24 at the rear of the machine body 2 is retracted upward and forward from the use position P1 (see FIGS. 1 to 3) for spraying the chemical liquid to the intercostal space W via the rotating member 10. It is supported by the machine body 2 so as to be movable between the retracted position P2 (see FIGS. 5 and 6). In this example, the rotation lever 16 and the rotation member 10 are connected by a known link mechanism 26 so that the spray nozzle portion 24 moves according to the operation of the rotation lever 16. Specifically, when the pivoting lever 16 is tilted forward, the spray nozzle portion 24 is in the use position P1, and when the pivoting lever 16 is tilted backward, the spray nozzle portion 24 is moved to the retreat position P2. The spray nozzle portion 24 provided on the rotating member 13 is disposed behind the auxiliary wheel 5 and rotates together with the auxiliary wheel 5 according to the rotation of the rotating member 13. The hand-held spray nozzle unit 25 is for an operator to perform hand-spraying in a place where the spray nozzle unit 24 cannot spray or difficult to spray.

  A check valve 27 is provided in the vicinity of the spray nozzle portion 24 in the chemical solution supply path to the spray nozzle portion 24. The check valve 27 is configured to open the valve when the pressure in the chemical solution supply path rises above a predetermined level, and prevents the chemical solution from leaking from the spray nozzle portion 24 when spraying is stopped. . In addition, a valve (not shown) for opening and closing the supply path is provided in the middle of the supply path. When the rotating members 10 and 13 are moved to the use position P1, the valve is interlocked with the movement. When the valve is opened and moved to the retracted position P2, the valve is closed in conjunction with the movement. With this configuration, leakage of the chemical solution from the spray nozzle portion 24 is more reliably prevented.

  In the chemical sprayer 1 of this example, the auxiliary wheel 4 is arranged by placing the chemical tank 21 that is the heaviest among the components of the machine when the chemical solution is filled, almost directly above the main wheel 3. , 5 and the spray nozzle 24 in the use position P1, the center of gravity of the machine is close to the main wheel 3 between the axle of the main wheel 3 and the axle of the auxiliary wheel 4 at the rear of the machine body 2 in plan view. Configured to be located. When the auxiliary wheels 4 and 5 and the spray nozzle portion 24 are moved to the retracted position P2, the auxiliary wheel 4 at the rear of the machine body 2 moves to the rear of the machine body 2, but the auxiliary wheels 5 and spray nozzles on both sides of the machine body 2 are moved. The part 24 and the spray nozzle part 24 at the rear of the machine body 2 move to the front of the machine body 2. For this reason, the center of gravity of the machine moves closer to the axle of the main wheel 3 than in the state where the auxiliary wheels 4 and 5 and the spray nozzle portion 24 are in the use position P1. Even in the state where the auxiliary wheels 4 and 5 and the spray nozzle portion 24 are in the retracted position P2, the center of gravity of the machine is still behind the axle of the main wheel 3 in order to prevent the chemical sprayer 1 from tilting forward. I have to.

Next, replacement work by the chemical sprayer 1 of the present invention will be described mainly with reference to FIG.
(1) The chemical solution is sprayed onto the intercostal space W (see the state indicated by A in FIG. 7 and FIGS. 1 to 3), and when the sprayer 1 reaches the heel end, the sprayer 1 travels and sprays. Stop. Then, the rotation lever 16 is tilted backward and locked, and the auxiliary wheels 5 and 5 and the spray nozzle part 24 on both sides of the machine body 2 and the spray nozzle part 24 on the rear part of the machine body 2 are moved to the retracted position P2 (FIG. 4). reference). Next, the grip lever 6 a of the handle 6 is gripped, the lock of the auxiliary wheel 4 at the rear of the machine body 2 is released, and the handle 6 is lowered to tilt the machine body 2 rearward, so that the auxiliary wheel 4 at the rear of the machine body 2 is tilted. And the handle 6 are relatively close to each other (see the state indicated by the two-dot chain line in FIG. 5). In this state, the grip lever 6a of the handle 6 is released, and the auxiliary wheel 4 at the rear of the machine body 2 is locked. When the handle 6 is lifted upward, the auxiliary wheel 4 at the rear of the machine body 2 is lifted up to the retracted position P2. As a result, the airframe 2 is supported only by the main wheel 3 (see the state indicated by B in FIG. 7 and the state indicated by the solid line in FIG. 5).
(2) The main body 3 is driven only by the main wheel 3, and is moved to the next W to be sprayed.
(3) When the grip lever 6a of the handle 6 is grasped and the lock of the rear part 4 of the machine body 2 is released, the auxiliary wheel 4 moves to the use position P1 due to the weight of the auxiliary wheel 4 and the rotating member 10. The grip lever 6a of the handle 6 is released, and the auxiliary wheel 4 at the rear of the machine body 2 is locked at the use position P1 (see FIG. 4). Next, when the rotation lever 16 is tilted forward and locked, and the auxiliary wheel 5 and the spray nozzle part 24 on both sides of the machine body 2 and the spray nozzle part 24 on the rear part of the machine body 2 are moved to the use position P1, the replacement work is performed. Is completed (see the state indicated by C in FIG. 7 and FIGS. 1 to 3).

  According to the chemical sprayer 1 of the present example configured as described above, the position of the center of gravity in the state where all the auxiliary wheels 4 and 5 are moved to the retracted position P2 and can be traveled only by the main wheel 3 is all auxiliary. Since the wheels 4 and 5 are configured to be positioned relatively forward and relatively to the main wheel 3 side with respect to the center of gravity position in a state where the wheels 4 and 5 are moved to the use position P1, the vehicle can travel only by the main wheel 3. In the state, the burden on the worker who has the handle 6 is reduced, thereby improving the maneuverability of the machine. Therefore, it is possible to reduce the burden of work when the vehicle body 2 is turned in a narrow place so that the main body 3 can run only.

  The auxiliary wheel 5 is supported by the machine body 2 via a rotation member 13 that is pivotally supported by the machine body 2 so as to be able to rotate substantially forward and backward. The rotation member 13 is rotated in the side view. A use position P1 when the auxiliary wheel 5 is positioned substantially below the rotating shaft 13a of the moving member 13, and a retracted position P2 when the auxiliary wheel 5 is positioned substantially forward with respect to the rotating shaft 13a. Since it is comprised so that it may rotate between, the chemical | medical solution sprayer 1 which can move the gravity center of a machine with simple structure is realizable.

  Moreover, since the rotation member 13 is provided with the spray nozzle part 24 for spraying to the intercostal space W in the vicinity of the auxiliary wheel 5, the amount of forward movement of the center of gravity of the machine can be further increased. .

In addition, this invention is not limited to embodiment, For example, as follows, it can change suitably in the range which does not deviate from the meaning of invention, and can also be embodied.
(1) The auxiliary wheel is configured to travel in a space other than the space between the main wheel 3 and the adjacent space between the spaces.
(2) The auxiliary wheel 4 at the rear part of the machine body 2 is configured to be retracted forward similarly to the auxiliary wheel 5.
(3) Change the switching mode (switching mechanism, switching method, etc.) between the use position P1 and the retracted position P2 in the auxiliary wheel 4 at the rear of the machine body 2 as appropriate.
(4) Change the number of auxiliary wheels as appropriate. For example, the number of auxiliary wheels is only one, or the auxiliary wheel 4 at the rear of the machine body 2 is omitted.
(5) Change the arrangement position of the spray nozzle portion 24 as appropriate.
(6) The spray nozzle portion 24 is configured to spray to a place other than the intercostal space W (for example, on the ridge).

It is a side view of the chemical sprayer concerning one embodiment which materialized the present invention. It is a front view of the sprayer. It is a perspective view which shows schematic structure of the sprayer. It is a side view of the sprayer which shows the state in the middle of making it the state which can drive | work only with a main wheel. It is a side view of the sprayer which shows the state which can drive only with a main wheel. It is a back side perspective view showing the schematic structure of the sprayer which shows the state where it can run only with the main wheel. It is a top view which shows the change work by the sprayer. It is a front view which shows the conventional sprayer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chemical sprayer 2 Airframe 3 Main wheel 4 Auxiliary wheel 5 Auxiliary wheel 6 Handle 6a Grip lever 7 Spraying device 8 Engine 10 Turning member 10a Axis 11 Horizontal arm 11a Turning piece 12 Vertical arm 13 Turning member 13a Turning shaft 15 Link 16 Rotating lever 21 Chemical liquid tank 22 Chemical liquid pump 23 Chemical liquid hose 24 Spray nozzle part 24a Cover 25 Hand-held spray nozzle part 26 Link mechanism 27 Check valve P1 Usage position P2 Retraction position U 畝 W 畝

Claims (3)

An airframe, a main wheel provided at a front portion of the airframe and traveling between the furrows, and one or more auxiliary wheels supported by the airframe and traveling in another furrow different from the furrow where the main wheel travels. A walking sprayer comprising a handle protruding rearward from the aircraft and a spray device mounted on the aircraft;
All the auxiliary wheels are movable between a use position at which they can contact the ground and a retreat position retracted to a position relatively higher than the use position, and at each of the use position and the retreat position. It is configured to be position-fixable,
The position of the center of gravity when all the auxiliary wheels are moved to the retracted position is positioned relatively forward and relatively to the main wheel side with respect to the position of the center of gravity when all the auxiliary wheels are moved to the use position. A walking sprayer that is configured to do. At least some of the auxiliary wheels are supported by the airframe via a rotation member that is pivotally supported so as to be rotatable substantially forward and backward with respect to the airframe.
The rotation member has a position in which the auxiliary wheel is positioned substantially below the rotation axis of the rotation member in a side view, and the auxiliary wheel is substantially forward with respect to the rotation axis. The walking sprayer according to claim 1, wherein the walking sprayer is configured to rotate between the retracted position and the retracted position.   The walking sprayer according to claim 1 or 2, wherein the rotating member is provided with a spray nozzle portion for spraying the gap between the auxiliary wheels.

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