JPH0451889Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a power spreader, and more specifically, to a power spreader suitable for spreading powder and granular chemicals.

[Conventional technology]

As a conventionally well-known power spreader, as shown in Japanese Utility Model Application No. 58-112464,
An impeller is installed in a shell-shaped casing, a spiral air passage is provided around the impeller, and a discharge passage is formed continuously downstream of this air passage. A mounting seat is provided directly above the casing, and a drug tank is mounted on this mounting seat via a shutter mechanism. Furthermore, a drug supply passage from the mounting seat portion to the end of the discharge passage is partitioned into an inner discharge passage and an outer medicine supply passage by a partition wall integrally provided in both the casings. , is formed along the discharge flow path.

[Problem that the invention attempts to solve]

Such a power spreader has a structure in which two halves of the casing are butted together, and the periphery of the casing is fastened together with screws to form a butt-like drug supply passage when the blower unit is assembled. Therefore, if the screw pitch is rough, the chemicals mixed in the conveying air will flow through the shutter mechanism and through the drug supply passage, and will be ejected together with the conveying air from the abutment joint surface around the casing, especially If the casing is made of plastic, there is a risk of thermal deformation, which will increase the gap between the butt joint surfaces and increase the degree of leakage, which will be dispersed to the surrounding area and cause the chemical to fall on the sprayer. In the past, there was a risk of harm to health. To prevent such problems, in the case of plastic casings, it is necessary to make the pitch of the tightening screws that connect the casings finer, or to make the casings made of aluminum and to improve the machining accuracy of the mating surfaces. If the number of screws is increased, the screw tightening work during disassembly and assembly will be complicated, and if the precision of the abutment surfaces is improved by making the device made of aluminum, the weight will increase and the cost will increase significantly.

[Means to solve the problem]

Therefore, in order to solve the above-mentioned problems, this invention was developed to form a drug supply passage from the metering chamber under the drug tank unit to the conveying air passage.
A drug supply pipe provided integrally with the metering tray in the metering chamber extends through the inside of the casing, beyond the joint with the conveyance tube, and into the conveyance tube, with its end open. It is something.

【Example】

Embodiments of this invention will be described below with reference to the attached drawings. In these figures, reference numeral 10 is an engine unit mounted on the backpack frame 11, and the output of this engine unit 10 also increases the output of the backpack frame 11.
It is designed to drive a blower unit 20 mounted on the. A drug tank unit 30 is mounted on top of the blower unit 20, and a drug supply pipe is connected from the metering chamber under the drug tank unit 30 to a transport pipe which is a transport air path connected to the blower unit 20. The distal end of the conveyance tube is connected to a tip tube (not shown). Next, each unit will be explained in detail. First, the blower unit 20 is mounted so that the impeller 24 can rotate in a space formed by abutting two shell-shaped casings 21 and 22, and the casings 21 and 22 are fitted with flanges 21A and 21A around them.
22A, a spiral passage 25 is formed in the space inside the casing at the outer periphery of the impeller 24, and a part of the conveying flow generated by the impeller 24 flows from the spiral passage 25 to the drug tank. It is adapted to be supplied to a metering chamber below the unit 30. A mounting seat 26 for a drug tank unit 30 is formed in the casing 22 constituting the blower unit 20, and a metering chamber 27 located in the lower space of the drug tank unit 30 attached to this mounting seat 26 is formed. It communicates with the spiral passage 25 via a communication port 28. The drug tank unit 30 has a funnel portion 32 with a narrowed cross-sectional area at the bottom of the tank body 31, and a supply port 33 for supplying the drug is bored in the funnel portion 32. The unit 30 is airtightly attached to the mounting seat 26 by means of a fastener 34 that surrounds the outer periphery of the funnel portion 32 thereof. A mounting member 35 is attached to the supply port 33 in close contact with the inner circumferential surface of the supply port 33.
Four support members 36 are formed from 5 to straddle the space above the supply port 33, and the top end of the support member 36 is located at a higher position than the lower end, and a support rod 37 of a bolt with a long shaft is located at the center of the support member 36. has been erected.
A cylindrical spacer 38 is fitted into the support rod 37, and a bowl-shaped dust umbrella 39 is provided at the top end of the support rod 37.
is tightened by nut 37A. The dust umbrella 39 temporarily bears the weight of the drug, and forms a stirring chamber 40 that acts on the drug falling into the supply port 33 with a conveying air to agitate the drug and give it fluidity. A metering valve 41 is disposed in the supply port 33, and the metering valve 41 is supported by a support 43 with respect to a rotating shaft 42 passing through the fastener 34. The opening area of the supply port 33 by the metering valve 41 can be adjusted by rotating it by the operator via the link 44. Furthermore, a box-shaped metering tray 45 with an open top surface is accommodated in the metering chamber 27, and a peripheral edge 45A of this metering tray 45 is fixed near the mounting seat 26 via a packing 26A. has been done.
This metering tray 45 has an air intake hole 45B that communicates with the communication port 28 and takes in a part of the conveyed air by the impeller 24 of the blower unit 20, and the medicine supplied from the stirring chamber 40 and the conveyed air. The mixture is continuously stirred in the metering space 45X. Furthermore, this metering tray 45 has air intake holes 4.
5B has a delivery hole 45Y, and a drug supply pipe 46 extends from the delivery hole 45Y by inserting it into the discharge channel 21X from the middle.
The end of 6 is connected to the casing 2 of the blower unit 20.
A connecting portion 47 between the discharge passage 21X and the conveyance pipe 47 extends into the conveyance pipe 47 which is connected to the discharge passage 21X formed by the discharge passage 21X formed by the discharge passage 21X.
It has an open configuration in the conveying pipe 47 beyond the X. A part of the conveyed air from the blower unit 20 passes through a communication pipe 48 communicating with the metering chamber 27, and is extended to the upper space inside the tank body 31 via a rubber pipe 49, and is sent to a breather to be described later. It is connected. A holder 5 is attached to the top end of the support rod 37.
0 is overlaid. The top of the tank body 31 is provided with an input port 51 for loading repellents, insecticides, fertilizers, etc., and a breather 53 that communicates with the inside of the tank is provided in a cap 52 attached to this port. The rubber tube 49 is connected to this breather 53. Next, the case of using the power spreader of this invention will be explained. The entire weight of the medicine (powder) loaded into the tank body 31 is once borne by the dust umbrella 39, and the medicine falls from between the periphery of the dust umbrella 39 and the inner circumference of the tank body 31, and is then delivered. Hole 4
The drug is supplied from 5Y to a transport pipe 47 through a drug supply pipe 46. At this time, the medicine in the tank body 31 is
Instead of falling directly into the dust umbrella 39, the weight is borne by the dust umbrella 39 located away from the supply port 33, and the dust falls from the surrounding space into the stirring chamber 40, where the conveyed air A part of the stirring air is introduced by opening the metering valve, is mixed with the drug, and is supplied to the supply port 33 in a mixed gas state. Therefore, clogging, the so-called tapping phenomenon, which occurs when using powder with small particles, does not occur. The stirring air guided into the metering tray 45 passes through the delivery hole 45Y, the drug supply pipe 46, and merges into the space inside the casing of the blower unit 20.
Furthermore, a connecting portion 47 between the casing and the conveying pipe 47
It extends along the conveying pipe 47 beyond the X. Therefore, the stirring air merges with the main flow of the conveying pipe 47 at the portion where it passes through the inside of the casing of the blower unit 20, thereby preventing leakage from the casing abutting surfaces.

[Effect of the idea]

As is clear from the above explanation, the power spreader of this invention has the following effects. (a) A drug supply pipe that is integrated with the metering tray attached to the metering chamber is extended into the casing of the blower unit, and extends into the conveyor pipe beyond the connection between the casing and the conveyor tube. Since the end is open, the agitated air containing the medicine will not leak from the casing of the blower unit. (b) There is no need to mold the casing from aluminum; the casing can also be made of plastic to prevent leakage, and the weight can be reduced.

[Brief explanation of the drawing]

Figure 1 is a front view of the power spreader of this invention, Figure 2
The figure is an enlarged cross-sectional view of main parts, Figure 3 is a cross-sectional view taken along the line of Figure 2, Figure 4 is a cross-sectional view taken along the line of Figure 2, Figure 5 is a cross-sectional view taken along the line of Figure 2, and Figure 6 is a cross-sectional view taken along the line of Figure 2. FIG. 7 is a plan view of the holder. 10... Engine unit, 20... Blower unit, 21, 22... Casing, 23... Bolt nut, 24... Impeller, 25... Spiral passage, 26... Mounting seat, 27... Metering chamber, 28 ……
Communication port, 30...Drug tank unit, 31...
Tank body, 32... Funnel part, 33... Supply port, 34... Fastener, 35... Mounting member, 36...
... Support member, 37 ... Support rod, 38 ... Spacer, 39 ... Dust umbrella, 40 ... Stirring chamber, 41 ...
Metering valve, 42... Rotating shaft, 44... Link, 45
...Measuring tray, 45B...Air intake hole, 45Y...
Delivery hole, 45X... metering space, 46... medicine supply pipe, 47... conveyance pipe, 48... communication pipe.

Claims (1)

[Scope of utility model registration request] In a power sprayer that is configured to introduce part of the conveying air generated by the blower into a chemical tank to draw out the chemical, and to distribute the chemical by combining it with the conveying air, there is a control unit installed in the metering chamber. A dosing tray and a drug supply pipe integrally formed with the dosing tray, the drug supply pipe being introduced into the casing of the blower unit and having its end disposed in a conveying pipe connected to the casing. A power spreader characterized by having an open configuration.