JPS63359Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a backpack-type power spreader, and more specifically, a part of the fan case and a backpack frame are integrally formed,
This invention relates to a backpack-type power spreader in which an air intake port is provided on the side of the backpack frame.

In conventional power spreaders, when air is taken into the fan through the intake port of the fan case, a back support frame, etc., which is completely separate from the fan case, is attached to the intake port side. A space is provided between the head and the intake port to facilitate air intake. (For example, as an example,
(Refer to Publication No. 23971) However, in order to unnecessarily expand the space in this form, equipment such as the engine, fan, air purifier, etc. is set at a position away from the backrest side. The center of gravity of the entire spreader is farther away from the backrest, and the operator is constantly being pulled backwards by the power tool itself during spreading work, so they feel physical resistance and are forced to move at high speeds. Direct exposure to the wind noise from rotating fans can lead to early mental and physical fatigue, and workers may accidentally blow the fan when adjusting a crest valve or correcting the position of a bent pipe. If your hand or part of your clothing is sucked into the inlet of the case,
There is also a risk of unexpected injury. Therefore, in order to improve the above-mentioned drawbacks, a backpack-type power spreader of the type shown in FIG. 5, for example, has been proposed.
That is, it communicates with the air intake 12 opened downwardly of the fan case 11 via the air guide chamber 13, and a communication passage 14 is formed perpendicularly to the air intake 12, so that the air intake 12 is connected to the fan case. The air flowing into 11 flows in the direction of the arrow, and as the fan 15 rotates, part of it flows through the window hole 16 to the engine 17 side, while forming pressurized air that blows out the spraying agent in the chemical tank 18. are doing. With this type, the center of gravity of the entire power spreader moves to the front, allowing work to be carried out more easily, and the noise caused by the rotation of the fan 15 can be greatly attenuated compared to conventional power spreaders. It has the following advantages. However, in this type of fan, since the air guide chamber 13 interposed between the air intake port 12 and the communication passage 14 is provided with a partition wall 19, it is difficult to inspect, adjust, clean, etc. the fan 15. , it is difficult for the worker to directly put his/her hand in through the air intake port 12, and in order to be able to put his or her hand in, it is necessary to widen the air guide chamber 13; As the engine 17 separates from the backpack frame 20, the power spreader as a whole is forced to increase in size.On the other hand, since the backpack frame 20 and the fan case 11 are formed completely separately, parts for assembly are required. In other words, the number of points increases, it takes time to assemble and disassemble, there is a risk of losing fasteners such as screws and rivets, and the air intake port 12
is set below the fan case 11, so when the engine 17 starts, air is sucked into the fan case 11 by the rotation of the fan 15, and the air floats near the ground surface or rises above the ground surface. There are problems such as dust, dirt, pebbles, etc. being sucked into the fan case 11 along with the air, which may impede the rotation of the fan 15.

This idea was created by focusing on the above-mentioned problems, and includes a fan case in which the chemical tank is placed above and the engine that drives the fan is placed on the side.
It consists of a backpack frame on which this fan case is placed,
In a backpack-type power spreader having an air intake for air taken into the fan case, and a communicating passage perpendicularly to the center of the fan that communicates with the air intake, the side edge of the fan opposite to the engine; A part of the fan case that covers the backpack frame is formed integrally with the backpack frame, and a plurality of air intake ports are provided vertically on the sides of the backpack frame, and an intake port of the fan case is provided perpendicularly to the air intake ports. It is made up of the following.

Hereinafter, referring to FIGS. 1 to 4, one embodiment of this invention will be described. A part of the backpack frame 3 with the drug tank 1 set and fixed above is inserted into a part of the fan case 2.
The backpack frame 3 is formed into a single airtight casing, and an appropriate number (in this case, three) of elongated rectangular air intakes a are installed vertically on each of the sides d and d of the backpack frame 3. A suction port S is perforated in a part P of the fan case 2 so as to be perpendicular to these air intake ports a, and the air flowing in from the air a is fed into the fan case 2 through the suction port S. inhale,
Pressurized air generated by rotation of the fan F can be sent from an outlet e of the fan case 2 to a desired dispersion pipe (not shown).

The back frame 3 has a back rest 4 on the side opposite to the engine E.
The side edge 5 of the fan F opposite to the engine E is provided with a small space, and a part P of the fan case 2 is attached so that it can come into contact with the back of a worker (not shown). In addition, the partition wall W provided below the drug tank 1 is coated near the inlet S.
This prevents chemicals or fertilizers in the chemical tank 1 from falling unnecessarily into the fan case 2, and a ventilation path for the fan F is formed below the tank 1. Backpack strap attachment fittings 6 and 7 are attached to appropriate positions, respectively, and a backband strap (not shown) is hung over both of these fittings.

In the figure, 21 is a backrest, 22 is an ignition coil, 23 is an air cleaner cover, 24 is a crankshaft, 2
5 is a fuel tank, and 26 is a wind outlet.

Since this device has the above-mentioned configuration, the air flowing into the backpack frame 3 from the air intake port a enters the fan case 2 through the intake port S, and the air flows into the fan case 2 through the air intake port S.
Pressurized air is generated by fan F rotated by
from which it is discharged into the desired dispersion pipe.

According to this invention, a part P of the fan case 2 that covers the side edge of the fan opposite to the engine
Since it is integrally formed as part of the backpack frame 3, the backpack frame and the fan case are formed separately, which necessitates an increase in the number of parts to attach both. Compared to a spreader, the number of parts that need to be used can be reduced, so it is possible to reduce the labor involved in assembling and disassembling, and it is also possible to reduce the price. Since the side edge 5 of the fan F is covered with a part P on the side of the fan case 2 of the backpack frame 3, which has an empty space between The noise can be attenuated by the silencer effect in the space between it and the opening a, and since the air intake opening a is provided on the side d of the backpack frame 3, it is possible to dissipate the noise in a direction away from the worker's ears. By inducing air flow to the side of the worker, comfortable spraying work is possible in the summer.Furthermore, when this sprayer is installed on the ground surface and engine E is started, the soil and sand on the ground surface can be easily removed. This has the advantage that there is no danger that pebbles or dust floating above them will be sucked into the fan case 2 by the rotation of the fan F.

In addition, since the center of gravity of the entire power spreader is located on the worker side, early fatigue of the worker is not caused, and the air intake port a and the suction port S are provided perpendicularly to each other with a space in between. Therefore, it has the advantage of being able to prevent accidents such as a hand or a part of clothing being sucked into the inlet S.Also, although this invention was explained for a backpack-type power spreader, It is also applicable to type engine blowers.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of the proposed product, Figure 2 is a view taken along the - line in Figure 1, Figure 3 is a view taken along the - line in Figure 1, and Figure 4 is a view taken along the - line in Figure 1. FIG. 5 is a partially cutaway longitudinal sectional view of the conventional type. 1...Medical tank, 2...Fan case, 3...Back frame, 4...Back support, 5...Side edge of fan, E...
Engine, F... fan, a... air intake,
d... Side, P... Part of fan case 2, S...
...Intake port.

Claims (1)

[Scope of utility model registration request] It consists of a fan case in which a chemical tank is placed above and an engine that drives the fan is placed in the side, and a back frame on which this fan case is placed, and an air intake port for sucking air into the fan case, and this air intake port. In a backpack-type power spreader in which a communication path is set perpendicularly to the center of the fan that communicates with the fan, a part P of the fan case 2 covering the side edge 5 of the fan F on the side opposite to the engine E, and a backpack frame 3 are provided. A backpack-type power spreader which is integrally formed with a plurality of air intake ports a extending in the vertical direction of the side surface d, and an inlet port S of the fan case 2 provided perpendicularly to the air intake ports a. .