WO2013065390A1

WO2013065390A1 - Backpack blower work apparatus

Info

Publication number: WO2013065390A1
Application number: PCT/JP2012/071771
Authority: WO
Inventors: 政彦三浦; 良一下岡
Original assignee: 株式会社マキタ
Priority date: 2011-10-31
Filing date: 2012-08-29
Publication date: 2013-05-10
Also published as: JP2013094108A

Abstract

The air intake performance of the blower in a backpack blower work apparatus is maintained. A backpack blower work apparatus (1) for generating an airflow using a blower (3), wherein the blower (3) has an air intake port (41) facing a backpack frame (10) with an interval interposed therebetween, the air intake port (41) is covered with an air intake port cover (61), the air intake port cover (61) or the ventilator (3) is equipped with a partition member (64), and the partition member (64) projects toward the backpack frame (10) from the blower (3) side in the space between the backpack frame (10) and the blower (3).

Description

Back-loading blower

[Technical Field] The present invention relates to a backpack-type air blower that can be used while being carried by an operator and that can perform various operations by blowing air. For example, the back-loading blower is a blower, a medicine spreader, a medicine duster, or the like.

In Patent Document 1, the air inlet of the blower faces the back-to-back portion of the back frame (FIG. 2).
Moreover, in patent document 1, the conical dust-proof member is provided in the inlet port of the air blower. By making the dustproof member conical, the effective intake area of the dustproof member can be increased. The suction load of the blower can be maintained even when some dead leaves or the like adhere to the dustproof member.

Japanese Patent Laid-Open No. 2002-257097

However, in such a backpack-type blower working machine having an intake structure, for example, dead leaves and dust are sucked between the backpack frame and the blower. The sucked dead leaves and dust adhere to the surface of the dustproof member protruding in a conical shape. If dead leaves and dust adhere to the surface of the dust-proof member, even if the dust-proof member is conical, the air inlet of the blower is blocked and sufficient intake capacity cannot be obtained.

As with this power working machine, a back-fitted blower that generates an air flow with a blower provided in a backpack frame requires dust-proofing at the intake port in order to maintain the intake capacity of the blower.

A backpack type fan working machine according to the present invention is a backpack type fan working machine that generates an air flow with a blower provided in a backpack frame, and the blower has an air inlet that is opposed to the backpack frame at an interval, The mouth is covered with an air inlet cover, and the air inlet cover or the blower is provided with a partition member, and the partition member projects from the fan side toward the back frame between the back frame and the blower.

Preferably, the inlet cover is formed in a dome shape protruding from the blower toward the back frame, and the partition member is provided below the tip of the dome of the inlet cover.

Preferably, the partition member is formed in a plate shape that covers the entire width of the air inlet cover and partitions the air inlet of the blower up and down.

Preferably, the backpack-type blower working machine is a backpack-type medicine spreader that mixes and sprays the tank medicine and the airflow of the blower, and the tank includes a lower tank portion that forms a back-to-back portion of the backpack frame. And an upper tank portion formed integrally with the lower tank portion and positioned on the lower tank portion, and the upper side of the intake port is preferably covered with the upper tank portion.

Preferably, a concave portion is formed in the facing portion of the back frame facing the air inlet cover, and the concave portion has a shape recessed at least along the outer shape of the air inlet cover.

In the present invention, a partition member that protrudes from the blower side toward the backpack frame is provided between the backpack frame and the blower.
Therefore, dead leaves and dust sucked between the back frame and the blower are stopped by the partition member and do not completely block the intake port of the blower.
The air intake capacity of the blower can be maintained.

FIG. 1 is a perspective view of an air blowing type chemical spreader according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the main functions of the blower type chemical liquid spreader of FIG. FIG. 3 is a view showing a state in which a dustproof cover is removed from the apparatus main body of the blower type chemical sprayer of FIG. 4 is a cross-sectional view of the apparatus main body of the blower type chemical liquid spreader of FIG. FIG. 5 is a view showing the dome-shaped inlet cover of FIG.

FIG. 1 is a perspective view of a blower type chemical sprayer 1 according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining the main functions of the blower type chemical liquid spreader 1 of FIG.
1 has an engine 2, a blower 3, a blower pipe 4, a pressurization pipe 5, a tank 6, a supply pipe 7, and a mixing unit 8.
The blower type chemical liquid spreader 1 is a kind of a backpack type blower working machine, mixes the chemical liquid in the tank 6 and the air flow of the blower 3, and spreads it from the tip of the blower pipe 4.
The operator carries the blower-type chemical solution spreader 1 and uses the blower pipe 4.
The chemical solution stored in the tank 6 is, for example, a liquid chemical or a pesticide, mixed with the air flow in the blower tube 4 to be atomized, blown out from the blower tube 4 together with the air flow, and sprayed on farmland or the like.

The tank 6, the blower 3, and the engine 2 are fixed to the frame 9 of the blower type chemical sprayer 1. Thereby, the apparatus main body 10 as a backpack frame used on the back is constituted.
The frame 9 has a shape in which metal tubes are assembled into a rectangular frame shape, and the upper and lower portions of the rectangle are bent in the same direction (back side). A side part is formed between the upper part and the lower part.
The apparatus main body 10 can be placed on the ground by the lower part of the frame 9.
The apparatus main body 10 can be lifted by holding the upper part of the frame 9 by hand.

The tank 6 is a chemical solution container made of, for example, a plastic material.
FIG. 3 is a diagram illustrating a state in which the dust cover 11 having a large number of ventilation holes is removed from the apparatus main body 10 of the blower type chemical liquid spreader 1 of FIG.
4 is a cross-sectional view of the apparatus main body 10 of the blower type chemical liquid spreader 1 of FIG.
The tank 6 shown in FIG. 3 or FIG. 4 includes a box-shaped upper tank portion 21 and a lower tank portion 22 integrally formed in a thin plate shape below the upper tank portion 21. The upper tank portion 21 and the lower tank portion 22 communicate with each other to constitute one storage container. By adopting such a tank structure, a large capacity tank 6 can be obtained. Further, the center of gravity of the tank 6 can be lowered.
The side surface on the front side of the upper tank portion 21 and the side surface on the front side of the lower tank portion 22 are formed flush with each other and form a back-to-back surface 23 of the tank 6. Thereby, the tank 6 functions as a backpack frame together with the frame 9. A back support member 31 and two shoulder belts 32 are disposed on the back-to-back surface 23. An operator puts his arm on the shoulder belt 32 and carries the blower-type chemical sprayer 1 on the back in a state where the backrest member 31 on the back-to-back surface 23 hits the back.
The thin plate-shaped lower tank portion 22 is formed so as to extend downward from the bottom surface of the box-shaped upper tank portion 21.
A pair of rib portions 24 projecting in the left-right direction are provided upright at the center of both side surfaces of the lower tank portion 22. The rib portion 24 extends in the vertical direction on both side surfaces of the lower tank portion 22.
The side portion of the frame 9 is fixed to the tank 6 by a pair of rib portions 24. In this state, a part of the lower tank part 22 and a part of the upper tank part 21 project to the inside of the frame 9 bent into a Japanese katakana U-shape or an English U-shape.

As shown in FIG. 4, a hole 28 is formed in the center of the lower tank portion 22. The hole 28 has a vertically long oval shape that allows a hand to enter, and penetrates the central portion of the lower tank portion 22 in the front-rear direction.
A recess 29 centered on the hole 28 is formed on the back surface of the lower tank portion 22. The concave portion 29 is formed in a concave shape that extends to the front side with respect to the back surface of the lower tank portion 22. The concave portion 29 is formed in a concave shape substantially the same as the outer shape of a dome-shaped inlet cover 61 described later.
Further, as shown in FIG. 3, the back surface of the lower tank portion 22 is recessed over the entire width of the back surface of the lower tank portion 22. Thereby, in the side view of the blower type chemical spreader 1, the front shape of the blower 3 side by the blower 3 and the intake port cover 61 and the rear shape of the lower tank portion 22 as a backpack frame are substantially matched. Since the opposite side can be seen from the side as described above, it is possible to easily check the clogging condition such as dead leaves between the air inlet cover 61 and the lower tank portion 22. The operation of putting a hand through the hole 28 can be visually confirmed from the side of the blower type chemical liquid spreader 1. Workability is improved.
A tank cap 26 is detachably attached to the upper surface of the upper tank portion 21 with respect to the chemical solution inlet 25. The tank cap 26 is opened, and the chemical solution is poured from the inlet 25 of the tank 6. The tank cap 26 is closed and the tank 6 is sealed. The sealed tank 6 can be pressurized by the air flow of the blower 3.

The blower 3 and the engine 2 generate an air flow. A motor may be used instead of the engine 2. The engine 2 drives the blower 3 to rotate. The driven blower 3 sucks outside air from the intake port 41 with a built-in fan, and generates an air flow.
The blower 3 and the engine 2 are disposed below the frame 9. The blower 3 and the engine 2 are accommodated between the upper part and the lower part of the frame 9.
For example, the blower 3 is fixed to the lower part of the frame 9 by a spring suspension 51. The engine 2 is fixed behind the blower 3.
By adopting such a support structure, the vibration of the engine 2 is hardly transmitted to the frame 9 through the blower 3 while the blower 3 and the engine 2 are firmly fixed to the frame 9 and the tank 6. The gap between the dust-proof cover 11 attached to the tank 6 and the blower 3 can be minimized as long as no abnormal noise is generated.
The blower 3 is fixed to the lower portion of the frame 9 in such a direction that the intake port 41 is on the tank 6 side (front side). The air inlet 41 on the front surface of the blower 3 can be positioned at a position facing the lower tank portion 22 constituting the back-to-back portion of the backpack frame. The blower 3 sucks air from the gap between the tank 6 and the blower 3.
The upper tank portion 21 covers the space between the lower tank portion 22 and the blower 3 that constitute the back-to-back portion of the backpack frame. Thereby, dead leaves and dust are not sucked into the gap from above.

A dome-shaped inlet cover 61 is attached to the inlet 41 of the blower 3.
FIG. 5 is a view showing the dome-shaped inlet cover 61 of FIG.
FIG. 5A is a front view of the air inlet cover 61. FIG. 5B is a side view of the air inlet cover 61.
The dome-shaped inlet cover 61 includes a cover main body 62 having a convex spherical shape and a large number of slits 63 formed in the cover main body 62. The slit 63 is horizontally long when attached. Further, the slit 63 is formed in a width that does not allow a finger to enter.
The cover main body 62 is attached to the blower 3 so as to cover the entire intake port 41, and protrudes from the blower 3 to the tank 6 side (front side). Since the recess 29 is formed on the back surface of the lower tank portion 22 of the tank 6, a gap can be secured between the dome-shaped cover body 62 protruding from the blower 3 and the tank 6 as shown in FIG. 4.
Moreover, since the recessed part 29 of the lower tank part 22 is formed horizontally long over the full width of the back surface of the lower tank part 22, in the state which attached the air blower 3 to the backpack frame, as shown in FIG. From the lateral direction, the air inlet cover 61 can be seen through between the lower tank portion 22 and the blower 3.
Further, the hole 28 of the lower tank portion 22 corresponds to the tip of the dome of the intake port cover 61.
The dome-shaped inlet cover 61 includes a partition plate 64. The partition plate 64 extends over the entire width from the right end to the left end of the dome-shaped intake port cover 61. The partition plate 64 is formed integrally with the air inlet cover 61 at a position below the center of the dome-shaped air inlet cover 61. The partition plate 64 is provided at a position 1/3 from the bottom of the height of the dome-shaped intake port cover 61. The height position of the partition plate 64 is lower than the tip of the dome.
As shown in FIG. 3, the partition plate 64 partitions the intake port 41 into an upper 2/3 central portion and upper portion and a lower 1/3 lower portion. Dead leaves, dust, etc. sucked from the lower side between the lower tank portion 22 and the blower 3 are difficult to reach above the central portion. Even if the lower third of the dome-shaped inlet cover 61 is blocked, the blower 3 can maintain a sufficient intake capacity.
In addition, you may provide the partition plate 64 below the inlet 41 about the air blower 3. As shown in FIG.

The blower tube 4 discharges an air flow. The blower pipe 4 is connected to the blower 3. The air flow of the blower 3 is discharged from the tip of the blower pipe 4 to the outside.
The blower tube 4 has a bellows tube portion 71 and a handle 72.
The blower tube 4 can be bent by the bellows tube portion 71. The operator can adjust the direction of the blower tube 4 by operating the handle 72 and bending the bellows tube portion 71 in a state where the blower type chemical liquid spreader 1 is carried.
In place of the bellows tube portion 71, for example, a flexible vinyl tube may be used.

The pressure tube 5 is connected between the blower 3 and the tank 6. A part of the air flow of the blower 3 is introduced into the tank 6 through the pressure pipe 5. The tank 6 is pressurized by this air flow.
The tip of the pressurizing pipe 5 extends into the tank 6 and is connected to a jet part 81 having a built-in check valve. Air is discharged into the tank 6 from the ejection part 81. The chemical solution in the tank 6 is agitated by the released air bubbles.

The supply pipe 7 supplies the chemical solution in the tank 6 to the blower pipe 4. The supply pipe 7 is connected between the tank 6 and the mixing unit 8.
The supply pipe 7 is connected to a supply port 27 formed at the bottom of the tank 6. A strainer (not shown) integrated with the supply pipe 7 projects into the supply port 27 of the tank 6 into the tank 6.
An opening / closing valve 91 is provided in the middle of the supply pipe 7. The on-off valve 91 is fixed to the side of the handle 72.

The mixing unit 8 mixes the chemical solution with the air flow of the blower tube 4. The mixing unit 8 is disposed at the tip portion of the blower tube 4.
As shown in FIG. 2, the mixing unit 8 includes a throttle unit 101. The throttle unit 101 exhibits a venturi effect with respect to the supplied air flow. The tip of the nozzle 102 connected to the other end of the supply pipe 7 is disposed on the upstream side of the throttle unit 101.
The chemical solution supplied from the pressurized tank 6 is discharged from the nozzle 102 and becomes a mist at the throttle unit 101. The atomized chemical liquid is discharged from the tip of the blower tube 4 by the airflow of the blower tube 4.

At the time of use, the operator holds the blower type chemical solution spreader 1 in which the chemical solution is put in the tank 6 and holds the handle 72. The operator opens the cock of the on-off valve 91 and operates the operation lever of the handle 72 to operate the engine 2 and the blower 3. Thereby, the mist-ized chemical liquid is blown out from the tip of the blower tube 4. The operator can adjust the direction of the blower pipe 4 to spray the chemical liquid on a desired land.
At the time of storage, the operator places the blown chemical solution spreader 1 on the floor. Further, the cock of the on-off valve 91 is closed. Thereby, the chemical | medical solution of the tank 6 does not leak out. As shown in FIG. 1, the chemical solution in the tank 6 does not leak from the nozzle 102 even when the blower pipe 4 is placed on the floor.
Note that the air duct 4 may be bent during storage or transportation, and the handle 72 may be hung on an annular strap 111 fixed to the upper part of the frame 9, for example. Thereby, the air pipe 4 can be stood up and the nozzle 102 of the mixing part 8 can be located above the tank 6. FIG. Even if the cock of the on-off valve 91 is forgotten to close, the chemical liquid in the tank 6 does not leak.

As mentioned above, in this embodiment, the air blower 3 is arrange | positioned at the back side of the lower tank part 22 which comprises a backpack frame. The intake port 41 faces the back surface of the lower tank portion 22. And in this embodiment, the space | interval of the air blower 3 and a backpack frame is covered with the upper tank part 21, an upper side is covered with the dustproof cover 11, and the lower side is partitioned off with the partition plate 64. FIG.
Therefore, in this embodiment, for example, dead leaves and dust can be hardly sucked into the air inlet 41 of the blower 3 while ensuring high air permeability.
In particular, the partition plate 64 is formed over the entire width of the air inlet cover 61 on the lower side (the height position of the third position from the bottom) of the dome of the air inlet cover 61 that covers the air inlet 41 of the blower 3, The intake port 41 is separated vertically.
Thereby, for example, even if a situation occurs in which dead leaves or the like are sucked into the gap from the lower side, a situation in which the entire air inlet cover 61 is blocked by the dead leaves or the like is less likely to occur, and the blower 3 cannot be sucked. It is possible to effectively prevent the situation from occurring.
Moreover, a concave portion 29 is formed on the back surface of the lower tank portion 22 constituting the back-to-back frame, so that the intervals from the air inlet cover 61 projecting from the blower 3 to the dome shape are substantially equal. .
For this reason, in this embodiment, it is difficult for dead leaves or the like to be sandwiched between the inlet cover 61 and the partition plate 64 and the back surface of the lower tank portion 22. It is also possible to avoid a situation where more than half of the intake port cover 61 is blocked.
Even if the lower portion of the air inlet cover 61 is covered with dead leaves, the dead leaves covering the air inlet cover 61 can be easily removed by putting a hand through the hole 28 formed in the center of the lower tank portion 22.
Therefore, the performance of the blower 3 is unlikely to deteriorate.
As described above, in this embodiment, while ensuring the upper, lower, left and right intake passages of the blower 3, dead leaves, dust adhesion and accumulation on the intake port 41 and the intake port cover 61 of the blower 3 are prevented, and the performance of the blower 3. Can be maintained.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications or changes can be made without departing from the scope of the invention.
For example, in the above embodiment, the back frame frame 9 is fixed to both side surfaces of the tank 6, and the back support member 31 and the back belt 32 are attached to the front surface of the tank 6. In addition, for example, the back support member 31 and the back belt 32 of the back frame may be attached to the frame 9 of the back frame.
The said embodiment is an example which applied this invention to the ventilation type chemical | medical solution spreader 1. FIG. In addition to this, for example, there are a blower duster for spraying dust and granular fertilizer, and a blower that generates and discharges an air flow with the blower. The present invention can be applied to these blowers.
In the said embodiment, the plate-shaped partition plate 64 covering the full width is provided in the inlet cover 61 which covers the inlet 41 of the air blower 3. As shown in FIG. In addition to this, for example, the partition member may have a comb-teeth shape or a cubic shape with a thickness. Even with these shapes, infiltration of dead leaves and the like can be suppressed while ensuring air permeability.
Moreover, you may provide partition members, such as the partition plate 64, in the air blower 3 itself. In this case, the partition member may be formed on at least one of the lower side, the upper side, the left side, and the right side of the air inlet 41 of the blower 3. However, in consideration of placing the blowing chemical solution spreader 1 on the ground during work, the partition member may be formed at least below the air inlet 41 of the blower 3.

1 ... Blasting chemical spraying machine (back carrying type blower working machine)
3 ... Blower 6 ... Tank 10 ... System unit (backpack frame)
21 ... Upper tank portion 22 ... Lower tank portion 28 ... Hole 29 ... Recess 41 ... Intake port 61 ... Intake port cover 64 ... Partition plate (partition member)

Claims

A backpack type blower working machine that generates an air flow with a blower provided in a backpack frame,
The blower has an intake port facing the backpack frame with a gap, and the intake port is covered by an intake port cover,
The air inlet cover or the blower is provided with a partition member, and the partition member projects from the blower side toward the backpack frame between the backpack frame and the blower.
The air inlet cover is formed in a dome shape protruding from the blower toward the backpack frame,
The backpack type blower working machine according to claim 1, wherein the partition member is provided below a tip of a dome of the air inlet cover.
The backpack type blower working machine according to claim 2, wherein the partition member is formed in a plate shape extending over the entire width of the intake port cover and partitions the intake port of the blower up and down.
The backpack-type blower working machine is a backpack-type medicine spreader that mixes and sprays the tank medicine and the airflow of the blower,
The tank includes a lower tank portion constituting a back-to-back portion of the backpack frame, and an upper tank portion formed integrally with the lower tank portion and positioned on the lower tank portion,
The backpack type blower working machine according to claim 1, wherein an upper side of the intake port is covered with the upper tank portion.
The backside-type air blowing operation according to claim 1, wherein a concave portion is formed in a facing portion of the backside frame facing the air inlet cover, and the concave portion has a shape recessed at least along an outer shape of the air inlet cover. Machine.