JPH0454843Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a backpack-type chemical sprayer that eliminates static electricity generated during spraying work so as not to cause discomfort to the worker who is carrying the sprayer on his or her back. This relates to a backpack-type chemical sprayer that takes into consideration the following.

[Conventional technology]

Conventionally, as described in Japanese Utility Model Application Publication No. 1983-83469 and the outline of which is shown in FIG. A worker who works while carrying a sprayer including the blower c on his/her back by molding the spray pipe d from a conductive synthetic resin material and causing the static electricity generated in the blower c to flow to the ground via the ground chain a. Proposals have been made to prevent electrostatic shock from being applied to e.

[The problem that the idea attempts to solve]

By the way, in actual use, the ground chain a is connected to the worker e.
or become entangled in crops.
Problems arose because there was a risk of breaking the chain or causing the worker to fall. In addition, the ground chain a has the effect of removing static electricity only from the conductive part to which it is attached, but current power spreaders are made of mostly non-conductive materials in order to reduce the weight of their construction. It is made of synthetic resin (polyethylene, polypropylene, etc.). For this reason, in a power sprayer that has a structure in which the chemical is mixed into the pressurized air flow generated by the chemical tank f and the blower c, the chemical, the blower, the chemical passage in the fan case, and the inside of the fan case are Static electricity generated by contact with the plastic parts is stored in the synthetic resin parts and is discharged from the part with the lowest resistance, but this is not limited to the bent tube b, but can also be discharged from the metal fittings of the backpack g, etc. , and give a shock to the worker, so it must be said that the above-mentioned measures against static electricity are insufficient.

[Means to solve the problem]

Here, this invention includes a backpack frame 1 on which a back support part 6 is disposed and can be carried on the back, a fan case 2 placed on the backpack frame 1, and a fan case 2 that rotates and drives the fan in the fan case 2. A prime mover 4 installed on the side edge of the case 2, a chemical tank 5 placed above the fan case 2, and a dispersion pipe 9 connected to the discharge port of the fan case 2 via a bent pipe 7 and a flexible pipe 8. In a backpack-type chemical sprayer, at least one of which is made of a conductive material,
The part of the back support part 6 that comes into contact with the worker is made conductive, and this part is connected to the fan case 2, the bent pipe 7,
A backpack-type chemical sprayer is proposed in which a flexible pipe 8 and a spraying pipe 9 made of a conductive material are electrically connected to each other via a conductive wire 10.

[Effect]

In the backpack-type chemical sprayer of this invention with the above configuration, the backrest that comes into contact with the worker is connected to the sprayer component made of conductive material via a conductive wire, so that static electricity is generated and the worker is This eliminates the potential difference between the two and prevents the worker from being shocked by static electricity.

〔Example〕

This invention will be explained in detail below with reference to FIGS. 1 and 2.

A blower 3 having a fan case 2 containing a built-in fan is attached to a backpack frame 1 of the backpack-type chemical sprayer shown in the figure. A drug tank 5 accommodating the
A back rest part 6 is formed in the seat. In addition, a flexible pipe 8 is provided in the bent pipe 7 formed at the discharge port of the fan case 2.
A dispersion pipe 9 is connected via the. Here, the fan case 2 is made of metal or conductive wire synthetic resin, and the supporting connection part with the backpack frame 1 is made of a material such as natural rubber, which is conductive from an electrostatic point of view, and the backpack frame 1 itself is also conductive. (see FIG. 2). in this case,
Naturally, the outer skin of the backrest 6 is made of conductive material (conductive synthetic resin or printed conductive band in the case of natural fibers or synthetic resin) and conductive means, and is made to be conductive by the worker. This connects the static electricity generation site to the electrostatically conductive worker (human body). in this way,
According to this invention, since the worker carrying the backpack-type power spreader and the static electricity generation site are always in contact with each other, there is no potential difference, and therefore the worker is not affected by static electricity. In the figure, 11 is a vibration-proof rubber.

In addition to the above configuration, if the bent pipe 7, flexible pipe 8, and spraying pipe 9 are made of conductive material, such as conductive synthetic resin, the sprayer 9 can be held by hand, making it possible to use the backpack-type chemical sprayer of this invention. Electrical connection with the human body (worker) becomes more reliable.

[Effect of idea]

According to the above-described structure of this invention, the worker and the backpack-type chemical sprayer are electrically connected, and therefore the conventional ground chain is not required. It is possible to safely release a worker from a shock of static electricity without causing troubles such as the worker falling down due to the ground chain getting entangled in the ground chain, or the ground chain damaging the crops.

[Brief explanation of drawings]

Figure 1 is a perspective view of a backpack-type power spreader based on this invention, and Figure 2 is an enlarged view of section A in Figure 1.
FIG. 3 is a perspective view showing a conventional structure. In the figure, 1... Back frame, 2... Fan case, 3... Blower, 4... Engine (prime mover), 5... Drug tank, 6... Back rest, 7...
Bent pipe, 8...Stork pipe, 9...Spreading pipe, 10...Conducting wire.

Claims (1)

[Scope of utility model registration request] A backpack frame 1 that is equipped with a back support part 6 and can be carried on the back;
A fan case 2 mounted on this backpack frame 1, a motor 4 installed on the side edge of the fan case 2 to rotationally drive the fan inside this fan case 2,
At least one of the drug tank 5 placed above the fan case 2 and the dispensing pipe 9 connected to the discharge port of the fan case 2 via a bent pipe 7 and a flexible pipe 8 is formed of a conductive material. In the backpack-type chemical sprayer, the part of the back support part 6 that comes into contact with the operator is made conductive, and this part is made of a conductive material among the fan case 2, bent pipe 7, snake pipe 8, and spray pipe 9. This backpack-type chemical sprayer is electrically connected via a conductive wire 10.