JPS6225245Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a backpack-type sprayer. In conventional backpack-type sprayer pumps, the cylinder that sucks in and pumps the medicinal solution is made up of a long and narrow pipe, so the stroke of the piston is long, and it is moved up and down by a handle that protrudes above the shoulder. This resulted in a lot of worker fatigue, and the drug solution container bounced around on their backs, making it difficult to use. The present invention relates to an improvement in this point, and will be described below based on an embodiment of the drawings.

The backpack-type sprayer according to the present invention includes a drug solution container 3 having a backpack strap 2, and a drug solution pump 5 that is detachably fixed to the top plate 4 of the drug solution container 3 with bolts, nuts, etc. teeth,
A suction valve (check valve) 7 is provided near the suction port 6 that opens at the lower part of the inner surface of the chemical liquid container 3, and a water suction valve that connects this suction valve with a large diameter cylinder 8 provided above the suction valve. Outside the pipe 9, there is a cylindrical pressurizing chamber 10 concentric with the water suction pipe, and the water suction pipe and the pressurizing chamber are connected via a discharge valve (check valve) 11 that discharges the chemical solution to the pressurizing chamber side. In the pressurized chamber, there is a spray nozzle 12 for spraying the chemical solution.
One end of the pressure feed pipe 13 for pressure feeding is open. On the other hand, in the large diameter cylinder 8 adjacent to the upper part of the pressurizing chamber,
The piston 14 is fitted and the piston rod 15
One end of an L-shaped connecting rod 16 is rotatably connected, and the other end of the connecting rod is connected to a lever handle 18 having a fulcrum 17 at the bottom of the drug solution container.

The sprayer of the present application having the above configuration has a large diameter cylinder with a short stroke and a lever handle that can be positioned low by adopting an L-shaped connecting rod. By slightly moving the handle up and down, you can easily spray the chemical solution. In addition, when operating the handle, the drug solution container is in close contact with your back and does not move, so operability is significantly improved. Unlike conventional methods, you do not have to move your hands awkwardly and large, so there is less fatigue and it is easier to handle. Even inferior women and children can easily use it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a partial sectional view taken along the line A-A. 19... Cylinder cap, 20... O-ring, 21... Chemical solution inlet cap.

Claims (1)

[Scope of utility model registration request] Consisting of a drug solution having a shoulder strap and a drug pump detachably fixed to the drug solution,
The chemical liquid pump has a suction valve near the water inlet opening at the inner lower part of the chemical liquid container, and a water suction pipe connecting the suction valve and a short stroke cylinder located above the suction valve is connected to the surrounding area. There is a pressurization chamber that communicates with the water suction pipe via a discharge valve, and one end of the pressure feed pipe that communicates with the spray nozzle is open in the pressurization chamber, and a piston that fits into the cylinder is provided in the pressurization chamber. One end of an L-shaped connecting rod is connected to the rod, the other end of the connecting rod has a fulcrum at the bottom of the chemical solution container, and
A backpack-type sprayer characterized in that it is connected to a lever handle that protrudes in front of the user when the drug solution container is carried on the user's back.