JPH0337729Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chemical sprayer that mixes a chemical in a chemical tank into the pressure air generated by a fan and disperses the mixture.

Conventionally, this type of chemical sprayer is carried by the worker on his or her back and the spray hose is held in the hand to spray the chemical, but due to the structure, the intake port of the fan is directed toward the back of the worker in front. Since the opening is open to the front, the intake sound of the fan is directly transmitted to the ears of the workers who are located in the upper front position, causing discomfort and making it difficult for workers to communicate with each other, which hinders their work.

The present invention has been developed by installing a plurality of sound insulating plates that are inclined forward and downward at the intake port of the fan, vertically and vertically arranged at appropriate intervals in order to block the intake noise that is directed in the front and upward direction. The purpose is to prevent intake noise from directly propagating to the worker's ears, eliminate worker discomfort, and improve work efficiency, without complicating the intake passage, thus reducing intake resistance. It is an object of the present invention to provide a chemical sprayer that does not reduce the air blowing performance of the fan.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

In the figure, 1 is a fan that is fixed to the crankshaft 5 of the engine 3 and rotates, 7 is a case that covers the fan 1, 9 is a drug tank that is fixed to the upper part of the case 7, and 11 is a fan provided in front of the case 7. 7
This is the air intake port. Pressurized air generated by the fan 1 driven by the engine 3 is sent to the air passage 13.
It is configured such that the medicine in the medicine tank 9 is mixed with the pressure air and sprayed on the way through a discharge port (not shown). 15, 15, . . . are a plurality of sound insulating plates tilted forward and downward at the intake port 11,
They are arranged vertically in parallel at appropriate intervals, and are intended to block intake noise directed in the forward and upward direction. 17
21 is a support frame to which the case 7 is fixed via brackets 19, 19, and 21 is a back plate which is fixed to the support frame 17. A band (not shown) is fixed to the support frame 17 when the operator places it on his/her back. This is something that is carried by the government.

In the above configuration, when the engine 3 is rotated, the fan 1 fixed to the crankshaft 5 rotates, and the air sucked from the intake port 11 becomes pressurized air and flows from the ventilation passage 13 to the discharge port (not shown). sent to. During this process, the medicine in the medicine tank 9 is mixed with the pressure air, and is sprayed from a discharge port (not shown) through a discharge hose (not shown). The operator places the back plate 21 on his back, puts the band (not shown) fixed to the support frame 17 over his shoulder, carries the machine on his back, and carries out the spraying work by holding the discharge hose (not shown). be. Although the worker's ears are located above and in front of the intake port 11, the sound insulating plate 15 blocks out the intake sound, significantly reducing the sound propagating to the worker's ears.Moreover, the intake passage is wide. It does not bend and does not increase air intake resistance.

As described above, the present invention provides a chemical sprayer that mixes and sprays a chemical in a chemical tank into the pressurized air generated by a fan. This chemical sprayer is equipped with a plurality of sound insulating plates that slope forward and downward at the intake port, arranged vertically at appropriate intervals in order to block intake noise that is directed forward and upward. By reducing the suction noise of the fan that propagates to the air, it eliminates the discomfort of the workers, and by reducing the noise, it becomes easier for workers to communicate with each other, and work efficiency can be improved. There is no need to complicate the air passage, therefore there is little air intake resistance, and the air blowing performance of the fan does not deteriorate.

Note that the present invention is not limited to the above-mentioned embodiments, and the present invention can be implemented in modes other than the above-mentioned embodiments.

[Brief explanation of the drawing]

FIG. 1 is a side sectional explanatory view of one embodiment of the present invention. Explanation of symbols representing main parts of the drawing: 1...Fan, 9...Medical tank, 11...Intake port, 5...Sound insulating plate.

Claims (1)

[Scope of utility model registration request] In a backpack-type chemical sprayer that mixes and sprays a chemical in a chemical tank 9 into the pressurized air generated by a fan 1, the fan 1 has an intake port 11 opened in the front direction, and the air intake Mouth 1
1, a plurality of sound insulating plates 15, 15 tilting forward and downward;
A chemical sprayer characterized in that... are arranged vertically in parallel at appropriate intervals to block intake noise directed in the forward and upward direction.