JPH0532214Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a backpack-type power sprayer equipped with a pressure regulating valve, and more specifically relates to a backpack-type power sprayer that improves the operability of the handle of the pressure regulating valve. It is something.

[Conventional technology]

Figures 15 and 16 are front views of the lower part of a backpack-type power sprayer 10 with a conventional mounting structure for a pressure regulating valve (views from the side opposite to the side on the operator's back).
and a side view. The backpack frame 11 of the backpack-type power sprayer 10 includes a chemical solution tank 12 for storing a chemical solution,
An engine 14 and a pump 1 driven by power transmitted from the engine 14 via a gear case 16
8 is assembled. The carburetor 20 is connected to the engine 14
is installed in the intake passage of the engine, and supplies atomized fuel into the intake passage. The pressure regulating valve 22 is attached to a housing that forms a discharge port of the pump 18, and is attached to a handle 2.
4, the pressure adjustment value is adjusted, and the discharge pressure of the pump 18 is adjusted. Since the axial direction of the pump 18 is in the left-right direction of the backpack-type power sprayer 10, the rotational axis of the handle 24 is in the left-right direction of the backpack-type power sprayer 10. The throttle lever 26 is disposed at the lower front end of the side portion of the backpack-type power sprayer 10, and adjusts the throttle opening of the carburetor 20 via a throttle wire 28.

FIG. 17 is a flowchart of a chemical solution in a conventional backpack-type power sprayer 10. The pump 18 is driven by the engine 14, sucks in the chemical liquid in the chemical liquid tank 12 through the suction hose 70, and inhales the chemical liquid in the chemical liquid tank 12 through the suction hose 70.
The chemical solution is force-fed to the spray nozzle 74 through the spray nozzle 74. The pressure regulating valve 22 is attached to the housing of the pump 18 and adjusts the discharge pressure of the pump 18, and the remaining liquid is sent from the pressure regulating valve 22 to the chemical tank 12 via a return hose 76.
be returned to.

[Problem that the invention attempts to solve]

The problems of the conventional backpack-type power sprayer 10 are listed below.

(1) The operator cannot see the position of the handle 24 of the pressure regulating valve 22 while carrying the backpack-type power sprayer 10 on his or her back, that is, during spraying.

(2) Since the pressure regulating valve 22 faces to the side of the backpack-type power sprayer 10, it is cumbersome to operate the handle 24 while carrying the backpack-type power sprayer 10 on the back, and it is difficult to operate the handle 24 due to the size of the worker. Actually handle 2
4 is difficult to operate.

(3) Since the handle 24 is located relatively close to the engine 14, the handle 24 becomes hot, which is not desirable from a safety standpoint.

(4) Since the handle 24 protrudes laterally, depending on the height of the crop, the crop may get wrapped around the handle 24 during operation and be damaged.

(5) When repairing the pressure regulating valve 22, since the pressure regulating valve 22 is integrally fixed to the pump 18, the repair work efficiency is poor.

The object of this invention is to provide a backpack type power sprayer which overcomes these problems.

[Means for solving problems]

The configuration of this invention will be explained using reference numerals in the drawings corresponding to the embodiments. In the backpack-type power sprayer 10, a chemical liquid tank 12 that stores a chemical liquid, a pump 18 that pumps the chemical liquid in this chemical liquid tank 12,
The engine 14 that drives this pump 18 and the pump 1 whose pressure regulation value is adjusted by operating the handle 24
A pressure regulating valve 22 that adjusts the discharge pressure of 8 is connected to the shoulder frame 1.
It is assembled into 1. The shaft-shaped guide portion 34 is disposed on the side of the backpack frame 11 so as to extend in the front-rear direction. The mounting stay 38 is guided in the front-rear direction by the shaft-shaped guide part 34 and the shaft-shaped guide part 3
It is supported by the shaft-shaped guide part 34 so as to be rotatable around the axis line of FIG. The pressure regulating valve 22 is attached to the mounting stay 38 so that its handle 24 is in front of the main body of the pressure regulating valve 22, and is connected to the discharge port of the pump 18 via a flexible conduit 46.

[Effect]

The shaft-shaped guide portion 34 is disposed on the side of the backpack frame 11 and guides the attachment stay 38 in the front-rear direction of the backpack frame 11. The pressure regulating valve 22 is attached to the mounting stay 38 such that the handle 24 is located in front of the main body of the pressure regulating valve 22, and the position of the backpack frame 11 in the front-rear direction is adjusted by relative movement of the mounting stay 38 in the shaft-shaped guide portion 34. be adjusted. The operator operates the handle 24 on the side of the backpack frame 11 in the same manner as the throttle lever 26 or the like to adjust the pressure regulation value of the pressure regulation valve 22. If you do not operate the handle 24,
The mounting stay 38 is rotated around the axis of the shaft-like guide portion 34 to a position where the pressure regulating valve 22 and its handle 24 are retracted inward. Flexible conduit 46
is bent in response to a change in the relative position between the pump 18 and the pressure regulating valve 22, and the discharge port of the pump 18 and the pressure regulating valve 22 are bent.
Maintain communication with 2.

〔Example〕

This invention will be described below with reference to embodiments shown in FIGS. 1 to 14 of the drawings.

1 and 2 are a front view (a view seen from the side opposite to the side on which the back of the operator rests) and a side view of the lower part of the backpack-type power sprayer 10. Fixed stay 30
is fixed to the front end of the side of the backpack frame 11 on the throttle lever 26 side, and the shaft-shaped guide part 3 is fixed at the upper end.
It has 4. The shaft-shaped guide portion 34 extends substantially horizontally in the front-rear direction of the backpack frame 11.

FIG. 3 is a side view of the fixed stay 30, and FIG. 4 is a sectional view taken along the - line in FIG. Fixed stay 30
is fixed to the backpack frame 11 with screws 32, and the outer circumferential outline of the cross section of the shaft-shaped guide part 34 is circular. The elongated hole 36 extends parallel to the shaft-like guide section 34 along the lower edge of the shaft-like guide section 34 .

FIG. 5 is a sectional view of the joint between the fixed stay 30 and the attachment stay 38. The mounting stay 38 is
The shaft-like guide section 3 is rotatable around the axis of the shaft-like guide section 34 and movable in the axial direction of the shaft-like guide section 34.
It has a hinge joint part 40 that fits on the outer periphery of the 4. The stopper 42 is formed integrally with the hinge joint portion 40 and can come into contact with the side surface of the fixed stay 30, and limits the range of rotation around the shaft-shaped guide portion 34. The vertical plate portion 44 is connected to the hinge joint portion 40
is fixed at the end of the

1 and 2, the pressure regulating valve 22 is separated from the housing of the pump 18. That is, the main body of the pressure regulating valve 22 is fixed to the vertical plate portion 44 of the mounting stay 38 such that the handle 24 thereof is on the front side of the main body in the front-rear direction of the backpack frame 11.

FIG. 14 is a flowchart of the chemical solution in the backpack-type power sprayer 10. The pressure regulating valve 22 is located apart from the pump 18 and the flexible connecting hose 46 is connected to the pump 1
8 and the pressure regulating port of the pressure regulating valve 22 are connected, and the flexible residual fluid hose 48 connects the residual fluid port of the pressure regulating valve 22 and the suction port of the pump 18. pump 18
is driven by the engine 14 and the suction hose 7
The medical liquid in the chemical liquid tank 12 is inhaled through the medical liquid tank 12.
The pressure regulating valve 22 adjusts the discharge pressure of the pump 18 and returns the remaining liquid to the suction port of the pump 18 when the discharge pressure exceeds a predetermined value. The chemical liquid whose pressure has been regulated in this way is sent to the spray nozzle 74 via the discharge hose 72.

The operation of the embodiment shown in FIGS. 1 to 5 will be described. The handle 24 is a conventional throttle lever 2.
6, it is placed on the front end side of the side of the backpack frame 11, so that the operator can check the rotational position of the handle 24, that is, the pressure regulation value of the pressure regulation valve 22, even while carrying the backpack-type power sprayer 10 on his/her back. be able to. Furthermore, when a force is applied to the pressure regulating valve 22 in the front-rear direction of the backpack frame 11, the hinge joint 40 slides on the shaft-shaped guide portion 34, and the handle 24 is displaced in the front-rear direction of the backpack frame 11. Therefore, the handle 24 of the pressure regulating valve 22 can be adjusted to an appropriate position with respect to the front and back direction of the backpack frame 11 according to the physique of the worker, and the worker can carry the backpack-type power sprayer 10 on his/her back. in,
The handle 24 can be easily operated. The stopper 42 contacts the side surface of the fixed stay 30,
The pressure regulating valve 22 is prevented from falling outward in the left-right direction of the backpack-type power sprayer 10. After the handle 24 is operated, the hinge joint 40 of the mounting stay 38
is rotated around the axis of the shaft-shaped guide portion 34, and the pressure regulating valve 22 is tilted inward in the left-right direction of the backpack-type power sprayer 10. As a result, the pressure regulating valve 22 and the handle 24
is in the inwardly pulled position, and the handle 24
This can prevent damage to crops.

FIGS. 6 and 7 are a side view and a cross-sectional view showing the structure of the mounting stay 38 having the operation function of the button type stop switch 50. FIG. The button-type stop switch 50 controls stopping of the engine 14 and is provided on the outer surface of the fixed stay 30 near the rear end of the shaft-shaped guide portion 34.
It is designed to be pushed in by the tip of 4.

FIGS. 8 and 9 are cross-sectional views showing the button-type stop switch 50 in a released state and a pressed state, respectively. A gap 52 is formed in the fixed stay 30, and the leaf spring 54 is fixed to the back side of the fixed stay 30 at its proximal end, and the button type stop switch 50 on the front side of the fixed stay 30 is pushed through the gap 52 at its distal end. It's becoming possible.
As the mounting stay 38 moves rearward, the stopper 42 fixes the curved portion of the leaf spring 54 against the fixing stay 30.
As a result, the leaf spring 54 is elastically deformed and pushes the button-type stop switch 50 at its tip (FIG. 9).

10 and 11 are a side view and a cross-sectional view showing another example of the structure of the mounting stay 38 having the operation function of the button type stop switch 50. In this example, the mounting stay 38 is attached to the hinge joint 4
0 and the stopper 42 are separate from the vertical plate portion 44, which is the distal end portion. The bolt 58 rotatably connects the upper end of the base portion 56 and the lower end of the vertical plate 44 , and the tension spring 60 allows the vertical plate 44 to rotate around the axis of the bolt 58 to rotate the backpack power sprayer 10 . The vertical plate portion 44 is urged against the base portion 56 so as to rotate inward in the left-right direction. The button-type stop switch 50 is fixed to the base portion 56 at a position such that it can be pushed in by the lower edge of the vertical plate portion 44. In this way, without moving the pressure regulating valve 22 to the rear end position, the hinge joint 40 is rotated against the tension spring 60, the button type stop switch 50 is pushed in by the lower edge of the vertical plate 44, and the engine 14 is started. make it stop.

FIG. 12 is a side view showing yet another example of the structure of the mounting stay 38 that has the operation function of the button-type stop switch 50, and FIG.
FIG. In this structure, a through hole 62 is formed at the rear end of the elongated hole 36, and the button-type stop switch 50 is disposed below the through hole 62.
At the position of the through hole 62, the stopper 42 does not come into contact with the side surface of the fixed stay 30, and the stopper 42 does not come into contact with the side surface of the fixed stay 30.
As a result, the vertical plate portion 4
The side edge of 4 directly pushes the button type stop switch 50.

[Effect of idea]

Thus, in the backpack type power sprayer of this invention, the pressure regulating valve is movable in the front and rear directions of the backpack frame by an axial guide member disposed on the side of the backpack frame, and is also rotatable about the axis of the axial guide member. Also, the handle for adjusting the pressure regulation value of the pressure regulating valve is disposed forward of the main body of the pressure regulating valve,
The pressure regulating valve is attached to the mounting stay. This allows the operator to check the position of the pressure regulating valve while carrying the backpack power sprayer on his back, and the handle can be moved forward according to the operator's physique, making it easier to operate the handle. In addition, the pressure regulating valve can be rotated around the axis of the axial guide to retract the pressure regulating valve and its handle inward, preventing damage to crops by the handle and allowing for compact packaging during shipping. Furthermore, the pressure regulating valve can be attached separately from the pump, which simplifies repair work for the pressure regulating valve. In addition, the leaf spring covers the surface of the stop switch, which prevents the engine from stopping unexpectedly due to the material being sprayed coming into contact with the stop switch.

[Brief explanation of the drawing]

Figures 1 to 14 relate to embodiments of this invention.
Figures 1 and 2 are a front view (view from the side opposite to the side on which the operator's back rests) and side view of the lower part of the backpack-type power sprayer, and Figure 3 is a side view of the fixed stay, and Figure 3 is a side view of the fixed stay. Figure 4 is a cross-sectional view taken along the line - in Figure 3, Figure 5 is a cross-sectional view of the joint between the fixed stay and the mounting stay,
Figures 6 and 7 are side views and cross-sectional views showing the structure of the mounting stay that has the operating function of the button-type stop switch, and Figures 8 and 9 are cross-sectional views showing the button-type stop switch in its released state and pushed-in state, respectively. 10 and 11 are side views and cross-sectional views showing another example of the structure of a mounting stay that has a button-type stop switch operation function, and FIG. 12 shows a mounting stay that has a button-type stop switch operation function. A side view showing yet another example of the structure, FIG. 13 is a sectional view taken along the line of FIG. 12,
Figure 14 is a flow diagram of the chemical solution in a backpack-type power sprayer, and Figures 15 to 17 are related to the prior art.
Figures 5 and 16 are a front view (view from the side opposite to the side on which the worker's back rests) and side view of the lower part of the backpack-type power sprayer, and Figure 17 is a diagram of the chemical liquid in the backpack-type power sprayer. This is a flowchart. 10...Backpack type power sprayer, 11...Backpack frame,
12... Chemical tank, 14... Engine, 18...
...Pump, 22...Pressure regulating valve, 24...Handle,
34...Shaft-shaped guide part, 38...Mounting stay, 4
6, 48...Flexible connection hose (flexible conduit).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A chemical liquid tank 12 that stores a chemical liquid, a pump 18 that pumps the chemical liquid in this chemical liquid tank 12,
A backpack-type power sprayer in which an engine 14 that drives this pump 18 and a pressure regulating valve 22 that adjusts a pressure regulation value by operating a handle 24 and adjusts the discharge pressure of the pump 18 are assembled to a backpack frame 11. 10, a shaft-shaped guide part 34 is disposed on the side of the backpack frame 11 so as to extend in the front-rear direction, and an attachment stay 38 is attached to the shaft-shaped guide part 3.
4, the pressure regulating valve 22 is supported by the shaft-like guide portion 34 so as to be guided in the front-back direction by
is attached to the mounting stay 38 so that the handle 24 is in front of the main body of the pressure regulating valve 22, and is connected to the discharge port of the pump 18 via a flexible conduit 46. Features a backpack-type power sprayer. (2) Practical use characterized in that the engine stop switch 50 is disposed near the rear end of the shaft-shaped guide portion 34 and is operated by the mounting stay 38 at the rear end position of the mounting stay 38. A backpack-type power sprayer according to claim 1 of the patent registration claim. (3) The backpack according to claim 2 of the utility model registration, characterized in that the mounting stay 38 operates the engine stop switch 50 by moving backward to the rear end position or rotating at the rear end position. Power sprayer. (4) The mounting stay 38 is attached to the shaft-shaped guide portion 3.
4, and a distal end portion 44 which is rotatably coupled to the base portion 56 and to which the pressure regulating valve 22 is fixed. 56
A backpack-type power sprayer according to claim 1, which is attached to a backpack and is operated by rotating the tip end portion 44.