JP2000037644A - Power sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the joint of a motor and a pump from breaking and to smoothen spray work by fitting the motor on a base, supporting the pump by the motor, and separating the high temperature part of the motor from the operation part of the pump as far as possible. SOLUTION: Four foot bodies 10 and a holding frame 12 for transportation are fitted on a base 2 comprising a rectangular plate. In a motor 3, the engine 16 is fitted to the upper part on the rear side of the base 2 and the cylinder case 18 is fitted diagonally above the right side from the rear part on the left side. The casing of a pump 4 is fitted on the side wall of the cylinder case 18 of the motor 3. Since pump 4 is vibrated with the motor 3, external force applied to a joint is reduced. The operation part 74 of the pump 4 such as a control handle 67 is concentrated in the front left side part of the base 2. Besides, the high temperature part 75 of the motor 3 is concentrated in the rear right side part of the base 2 and separated from the operation part 74 as far as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power atomizer.

[0002]

2. Description of the Related Art As a conventional power sprayer, a prime mover and a pump are mounted on an upper portion of a base, and a pump is connected to the prime mover, and a chemical liquid tank is connected to a suction port of the pump. There is known one in which a spray hose is connected to a discharge port.

[0003] By driving the prime mover,
By operating the pump, the chemical solution inside the chemical solution tank is sprayed from the spray hose.

[0004]

However, in the conventional power atomizer described above, since the prime mover and the pump are mounted on the base, there is a possibility that the connection between the prime mover and the pump may be damaged.

That is, the prime mover generates vibration mainly when the cylinder moves up and down and exhausts, while the pump generates vibration mainly during suction and discharge, so that the prime mover and the pump are independently vibrated. Therefore, depending on the vibration, a great deal of force acts on the connection between the prime mover and the pump, which may cause damage.

[0006] In the above conventional power atomizer,
In order to reduce the size, the prime mover and the pump are arranged close to each other, and the operating part of the pump, which is often operated by the operator with bare hands, is close to the high temperature parts such as the cylinder case and muffler of the prime mover. However, when operating the pump, the operator may be burned, which hinders a smooth spraying operation.

[0007]

Therefore, in the present invention, a pump is interlocked to a prime mover, and a chemical tank is connected to a suction port of the pump, and a spray hose is connected to a discharge port of the pump. In the power atomizer, a prime mover was mounted on the base, and the prime mover supported the pump.

The operating part of the pump is arranged as far as possible from the high temperature part of the prime mover.

The operating part of the pump is arranged as far as possible from the exhaust part of the prime mover.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A power sprayer according to the present invention has a pump connected to a prime mover and a chemical liquid tank connected to a suction port of the pump, and a spray hose connected to a discharge port of the pump. In addition, a prime mover is mounted on the base, and the pump is supported by the prime mover.

Therefore, there is no need to mount the pump on the base, and the pump can be assembled simply by directly attaching the pump to the prime mover. On the other hand, the maintenance of the pump can be performed simply by removing the pump from the prime mover. And maintainability can be improved.

Moreover, by directly attaching the pump to the prime mover, the pump vibrates together with the prime mover along with the vibration of the prime mover, so that an external force acting on the connection between the prime mover and the pump can be reduced, and the connection part can be reduced. Damage can be prevented.

Further, by arranging the operating section of the pump as far as possible from the high-temperature section of the prime mover, when the operator operates the operating section of the pump, the operator's body is placed in the high-temperature section of the prime mover. It is possible to prevent accidental contact beforehand and improve the safety of the power sprayer.

In addition, by disposing the operating part of the pump as far as possible from the exhaust part of the prime mover, the exhaust of the prime mover does not come into contact with the worker's body during the operation of the pump, which makes the operator uncomfortable. , The usability of the power sprayer can be improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a power sprayer 1 according to the present invention.
In the power sprayer 1, a motor 3 is mounted on the upper rear side of the base 2, a pump 4 is connected to the motor 3, and a chemical solution tank 6 is connected to a suction port 5 of the pump 4. On the other hand, the base end of the spray hose 8 is connected to the discharge port 7 of the pump 4 and the spray nozzle 9 is connected to the tip of the spray hose 8.

Then, by driving the motor 3 and operating the pump 4, the chemical 64 in the chemical tank 6 is sprayed from the spray nozzle 9 to spray the chemical 64 such as agricultural chemicals.

Hereinafter, the structure of each part of the power sprayer 1 will be specifically described.

The base 2 is made of a flat plate having a rectangular shape in plan view. The front and rear edges are bent downward to increase rigidity. The gripping frame 12 for carrying the power sprayer 1 is mounted so as to be adjustable.

The gripping frame 12 is formed by bending a cylindrical pipe, and a pair of left and right bases attached along the periphery of the base 2 from the lower rear end to the lower left and right ends of the base 2. A pair of right and left standing members, which are connected to the end members 13 and 13 'and the front ends of the base member members 13 and 13', respectively, and rise from the left and right sides of the front end of the base 2 toward the rear upper side. It is composed of upper components 14, 14 'and a grip component 15 extending between upper ends of the compatible upper components 14, 14'.

The base end components 13, 13 'are attached to the periphery of the base 2 to increase the rigidity of the base 2.

The upright members 14, 14 'are located around the pump 4, and function as a protective frame for the pump 4.

The gripper component 15 is disposed immediately above the center of gravity of the power sprayer 1, and can carry the power sprayer 1 while maintaining a good weight balance of the power sprayer 1. Like that.

The prime mover 3 has an engine on the rear upper portion of the base 2.
A cylinder case 18 for accommodating a cylinder 17 of the engine 16 is mounted in a state where the cylinder case 18 is inclined upward from the rear left side of the base 2 to the upper right side.
An exhaust unit 21 consisting of an exhaust pipe 19 and an exhaust pipe 20 is attached.
The fuel tank 22 is disposed at a position on the left side of.

The pump 4 is, as shown in FIG.
A support plate 23 is mounted on the side wall of the cylinder case 18, and a casing 24 of the pump 4 is mounted on the support plate 23.

As described above, the prime mover 3 is attached to the base 2,
Since the pump 4 is supported by the prime mover 3, the pump 4 does not need to be mounted on the base 2 and can be assembled simply by directly attaching the pump 4 to the prime mover 3. On the other hand, the pump 4 can be simply removed from the prime mover 3 4 can be performed, and assemblability and maintainability of the power sprayer 1 can be improved.

In addition, damage to the connection between the motor 3 and the pump 4 can be prevented. That is, the prime mover 3
Vibrates mainly when the cylinder 17 is moved up and down and when the gas is exhausted from the exhaust pipe 20. On the other hand, the pump 4 generates vibration mainly when the chemical liquid 64 is sucked and discharged. When the motor 3 and the pump 4 are independently mounted on the base 2, depending on the vibration, a large external force acts on the connection between the motor 3 and the pump 4, Although the connecting portion may be damaged, by directly attaching the pump 4 to the prime mover 3 without attaching it to the base 2, the pump 4 vibrates together with the prime mover 3 with the vibration of the prime mover 3. The external force acting on the connection with the pump 4 can be reduced, and the connection can be prevented from being damaged.

As shown in FIG. 4, the pump 4 includes a pump main body 25 for operating the pump and a discharge pressure adjusting valve 26 for adjusting the discharge pressure of the pump 4.

The pump body 25 includes a pump driving unit 27 for performing a pump operation, and a pair of left and right pump operating units 28 and 2 for performing a pump operation in conjunction with the pump driving unit 27.
8 '.

As shown in FIGS. 4 and 5, the pump drive section 27 has an eccentric cam body 30 attached to an output shaft 29 of the prime mover 3, and a base end of a pair of left and right actuators 31, 31 'attached to the eccentric cam body 30. The departments are linked.

Then, by driving the prime mover 3 and rotating the output shaft 29, the left and right actuators 31, 31 'are moved forward and backward in the left and right directions, and the left and right actuators 31, 3 are moved.
The pump is operated at the tip of 1 '.

The left and right actuators 31, 31 'are integrally formed on both left and right sides of a cylindrical cylinder body 40,
A cam receiving recess 41 for receiving the eccentric cam 30 is provided in the middle of the cylinder 40 in a substantially U-shaped notch in plan view.
Is formed.

As shown in FIG. 12, the cylinder body 40 of the pump 4 is interlocked with the cylinder 17 of the prime mover 3 so as to advance and retreat in substantially the opposite direction.

That is, when the cylinder 17 of the prime mover 3 moves rightward and upward, the cylinder body 40 of the pump 4
Moves to the left, and when the cylinder 17 of the prime mover 3 is located at the top dead center, the cylinder body 40 of the pump 4 is located at the left end, while the cylinder 17 of the prime mover 3 moves downward and to the left. In this case, when the cylinder body 40 of the pump 4 moves rightward and the cylinder 17 of the prime mover 3 is located at the bottom dead center, the cylinder body 40 of the pump 4 is located at the right end.

As described above, since the cylinder 17 of the prime mover 3 and the cylinder body 40 of the pump 4 are moved in substantially the opposite directions, the vibration caused by the forward / backward movement of the cylinder 17 of the prime mover 3 The vibration caused by the forward and backward movement of the cylinder body 40 is offset, so that the vibration of the whole power sprayer 1 can be reduced, and the failure of the power sprayer 1 can be prevented. Generation can be prevented.

The eccentric cam body 30 is formed by connecting a columnar rotating column 33 to the rear of the disk-shaped cam 32 so as to extend rearward, and the cam 32 is eccentric from the center position of the outer circumferential circle of the cam 32. And rotating prop
A shaft connection hole 34 penetrating through the shaft 33 is formed.

Then, the output shaft 29 is inserted into the shaft connection hole 34, and the output shaft 29 and the eccentric cam body 30 are removably interlocked with the key 35, and the shaft connection located at the tip end side of the output shaft 29. An oil cap 47 covers the opening of the hole 34.

As described above, the shaft connecting hole 34 is formed in the eccentric cam body 30, the output shaft 29 of the motor 3 is detachably inserted into the coaxial connecting hole 34, and the pump 4 is connected to the motor 3 in an interlocking manner. Therefore, the assembling and disassembly of the motor 3 and the pump 4 are facilitated, so that the assembling and maintenance of the power sprayer 1 can be improved.

Moreover, since the oil cap 47 is provided to cover the opening of the shaft communication hole 34 formed at the tip end of the output shaft 29, when the motor 3 and the pump 4 are disassembled, the casing 24 of the pump 4 The internal lubricating oil flows from the shaft communication hole 34 to the casing 24
Can be prevented from leaking outside.

A bearing 36 is mounted on the outer peripheral portion of the cam 32 of the eccentric cam body 30, and a ring-shaped protective wheel 38 is mounted on an outer peripheral portion of an outer ring 37 of the bearing 36.

The protection wheel 38 is formed in an arc shape in which the substantially central portion of the outer circumference is bulged outward, and the outer circumference of the protection wheel 38 is formed at the base end of the left and right actuators 31, 31 '. Part.

As described above, the protection ring 38 is interposed between the outer ring 37 of the bearing 36 attached to the outer peripheral portion of the eccentric cam body 30 and the actuators 31, 31 '.
And the actuators 31 and 31 'are not directly in contact with each other, the reaction force from the actuators 31 and 31' when the pump is driven can be buffered by the protection wheel 38, and the outer ring 37 of the bearing 36 It is possible to prevent the bearing 36 from being damaged such as coming off the inner ring 39.

Further, the outer peripheral portion of the protective wheel 38 is formed in an arc shape toward the axial direction of the output shaft 29, and the outer peripheral portion of the protective wheel 38 is brought into contact with the left and right actuators 31, 31 '. Therefore, even if the axial direction of the bearing 36 is not orthogonal to the reciprocating directions of the actuators 31, 31 'due to an assembly error,
The base ends of the actuators 31, 31 'and the outer periphery of the protection wheel 38 come into smooth contact with each other, so that the friction between the protection wheel 38 and the actuators 31, 31' can be reduced, and the actuators 31, 31 ' Can prevent wear,
Loss during power transmission can be reduced.

The eccentric cam 30 is rotatably supported by the casing 24 of the pump 4, as shown in FIGS. That is, a cam body support boss 42 for supporting the eccentric cam body 30 is formed on the casing 24 of the pump 4,
The rotary support 33 of the eccentric cam 30 is inserted into the cam support boss 42, and an oil seal 43 is interposed between the rotary support 33 of the eccentric cam 30 and the cam support boss 42. On the inner peripheral surface of the support boss 42, four oil grooves 44 communicating from the inside of the casing 24 to the oil seal 43 are engraved along the axis of the rotating support 33, and the oil groove 44 and the oil seal 43 are formed. In between, the inner periphery of the cam body support boss 42 is cut out and
Is formed. In the figure, 46 is a stopper.

Then, the lubricating oil inside the casing 24 of the pump 4 is filled in the oil groove 44 and the oil sump 45 and also penetrates into the oil seal 43.

As described above, since the oil groove 44 communicating with the oil seal 43 from the inside of the casing 24 of the pump 4 is formed in the cam body supporting boss 42 and the oil groove 44 is filled with lubricating oil,
The friction between the rotating support 33 of the eccentric cam body 30 and the cam body support boss 42 can be reduced, and the durability of the power sprayer 1 can be improved.

Further, the eccentric cam body 30 can be smoothly rotated without using a separate bearing for supporting the eccentric cam body 30, and the support structure of the eccentric cam body 30 can be simplified. Thus, the size and weight of the power sprayer 1 can be reduced, and the manufacturing cost can be reduced.

Further, since the oil sump 45 is formed between the oil groove 44 and the oil seal 43, the oil seal 43 can also be lubricated with the lubricating oil filled in the oil sump 45, This also allows the eccentric cam body 30 to be smoothly rotated, so that the durability of the power sprayer 1 can be improved.

As shown in FIGS. 4 and 5, the pair of left and right pump operating portions 28, 28 'are formed at the distal ends of the left and right actuators 31, 31', respectively. Since the left and right pump operating portions 28, 28 'have substantially the same structure, here,
The structure of the left pump operating section 28 will be described.

The pump operating part 28 is a casing of the pump 4.
Inside the cylinder 24, a cylinder 48 that accommodates the actuator 31 movably forward and backward in the left-right direction is formed.
The suction port 49 is formed at a position directly below the actuator 31, and a first check valve 50 for circulating the chemical 64 from the base end side of the actuator 31 toward the tip end side of the actuator 31 is provided at the distal end of the actuator 31. A communication passage 51 communicating from the middle part of the cylinder to the first check valve 50 is formed.
48 are connected. In the figure, 48 'is the right cylinder,
49 'is a right suction port, 50' is a right first check valve, and 51 'is a right communication passage.

The pump operating portion 28 is formed at the left end of the casing 24 of the pump 4 with a connecting passage 52 connected to the first check valve 50 in a vertical direction. A second check valve for communicating and connecting a discharge port 53 formed on the upper left portion of the casing 24 and flowing a chemical solution 64 from the connection path 52 to the discharge port 53 between the connection path 52 and the discharge port 53. 54 are arranged. In the figure, 52 'is a right connecting passage, 53' is a right outlet, and 54 'is a right second check valve.

When the prime mover 3 is driven to move the actuators 31 and 31 'back and forth in the left and right directions,
64 flows from the suction ports 49, 49 'to the discharge ports 53, 53'.

That is, when the left actuator 31 is moved rightward, the left pump operating section 28 causes the chemical liquid 64 to flow from the suction port 49 to the cylinder 48, and the first non-return from the cylinder 48. When the liquid flows to the connection path 52 through the valve 50 and moves the left actuator 31 toward the left side, the chemical liquid 64 flows from the connection path 52 to the discharge port 53 through the second check valve 54. Like that. It should be noted that the right pump operating section 28 'operates alternately with the left pump operating section 28.

The left and right pump operating portions 28, 28 'are provided with suction ports 49, 4
9 ′ is connected to the chemical tank 6 and the outlets 53, 5
3 'is connected to the spray hose 8 in communication. That is, the base end of the suction hose 55 is disposed inside the chemical solution tank 6, the suction port 5 of the pump 4 is connected to the tip of the suction hose 55, and the suction port 5 is connected to the left and right suction ports 49, 49 '. Are connected to each other. On the other hand, the discharge port 7 of the pump 4 is
And a spray hose 8 is connected to the discharge port 7. Further, the base end of the circulation hose 56 is connected to the left and right discharge ports 53 and 53 ′ via the discharge pressure control valve 26, and the tip of the circulation hose 56 is disposed inside the chemical solution tank 6. In the figure, 57 and 58 are communication pipes.

The suction hose 55 is detachably attached to a three-way valve 62 described later. 4 and 13 and FIG.
As shown in FIG. 14, a male screw 85 formed at the base end of the joint 84 is screwed to the three-way valve 62, a cap 86 is attached to the distal end of the joint 84, and a nipple 87 attached to the distal end of the suction hose 55. It is detachably mounted while sandwiched.

A pair of locking pieces 88 are projected from the outer periphery of the distal end of the joint 84, while a pair of engagement grooves 89 are formed in the inner periphery of the cap 86. , Cap 86
The taper 90 is formed to be inclined from the base end side to the distal end side, and the locking claw 91 is formed to be inclined from the distal end of the taper 90 to the base end side of the cap 86. In the drawing, reference numeral 92 denotes a rotation knob, and 93 denotes an insertion groove.

When the cap 86 is rotated clockwise by approximately 90 degrees, the locking piece 88 of the joint 84 engages with the engaging groove of the cap 86.
89, the nipple 87 of the suction hose 55 is tightened by the joint 84 and the cap 86, and the cap 86 is further rotated slightly. The cap 86 is locked to the joint 84 so that the suction hose 55 can be attached to the joint 84.

On the other hand, when the cap 86 is slightly rotated counterclockwise, the locking piece 88 of the joint 84 is
89, the lock between the joint 84 and the cap 86 is released, and when the cap 86 is further rotated, the cap 86 can be removed from the joint 84. The suction hose 55 can be removed from the apparatus.

Thus, the pump 4 and the suction hose 55
And easy removal. The connection between the discharge port 7 of the pump 4 and the spray hose 8 and the discharge pressure control valve 26
The connection section between the and the circulation hose 56 has the same configuration.

A substantially U-shaped bypass pipe 59 is interposed between the suction port 5 and the discharge port 7 of the pump 4 to form a bypass flow path 60 communicating the suction port 5 and the discharge port 7. At the same time, an on-off valve 61 is interposed between the suction port 5 and the bypass pipe 59, while the bypass pipe 59, the suction port 5 and the suction hose 55 are provided.
A three-way valve 62 is interposed between the two valves, and the opening / closing valve 61 and the three-way valve 62 constitute a flow path switching unit 63.

The passage switching means 63 is a chemical spray passage 65 which is connected from the chemical tank 6 to the spray hose 8 via the pump 4.
And the chemical liquid recovery flow path 66 communicating from the spray hose 8 to the bypass flow path 60 and from the bypass flow path 60 to the chemical liquid tank 6 via the pump 4.

That is, as shown in FIG.
By opening 61, the pump 4 and the spray hose 8 are connected and connected, and the three-way valve 62 is used to connect the chemical solution tank 6 and the pump 4 so that the suction hose 55 → the three-way valve 62 → The suction port 5 of the pump 4 → the left and right pump operating sections 28 and 28 ′ → the discharge port 7 of the pump 4 → the open / close valve 61 → the spray hose 8 → the spray nozzle 9, and the pump 4 is connected to the inside of the chemical solution tank 6. Chemical spray path for performing chemical spray operation for spraying chemical 64 from spray hose 8
Form 65.

On the other hand, as shown in FIG. 11, the on-off valve 61 is closed to connect and connect the spray hose 8 and the bypass pipe 59, and the pump 4 and the chemical liquid tank 6 are connected to the discharge pressure regulating valve.
26, and the bypass pipe 59 and the pump 4 are connected and connected by the three-way valve 62, so that the spray nozzle 8 → the spray hose 8 → the bypass pipe 59 → the suction port 5 of the pump 4 → the left and right pump operating section. 28,28 '→ Discharge port 7 of pump 4
→ Discharge pressure control valve 26 → Circulation hose 56 → Communicate to chemical solution tank 6 to cause pump 4 to perform a chemical solution collection operation to collect chemical solution 64 remaining in spray hose 8 from spray hose 8 to chemical solution tank 6. Is formed.

When performing a normal spraying operation,
The chemical liquid 64 is sprayed from the spray nozzle 9 by switching to the chemical spray flow path 65 by the flow path switching means 63, and after the spraying operation is completed, the chemical liquid recovery flow path 66 is switched by the flow path switching means 63, whereby the spray nozzle The chemical 64 remaining in the spray hose 9 and the spray hose 8 is collected in the chemical tank 6.

As described above, since the pump 4 performs the chemical solution recovery operation, the weight of the spray hose 8 can be reduced during the spraying operation or when the spray hose 8 is transported after the end of the operation. Work effort can be reduced.

Further, since the chemical solution 64 does not remain inside the spray nozzle 9 and the spray hose 8, corrosion of the spray nozzle 9 and the spray hose 8 by the chemical solution 64 can be prevented, and the durability of the power sprayer 1 can be improved. Can be improved.

Also, when performing the spraying operation using different chemicals 64, the chemicals 64 do not mix with each other, the chemicals 64 can exhibit their original medicinal effect, and the chemical reactions between the chemicals 64 can be prevented. Thus, the safety of the spraying operation can be improved.

In addition, the conventional power atomizer has a bypass passage.
Since the pump 4 is configured to perform the chemical liquid collecting operation only by providing the channel switching means 63 and the channel switching means 63, the above-described effect can be obtained with a simple configuration.

The discharge pressure control valve 26 is provided with
As disclosed in Japanese Unexamined Patent Publication No. 5 (1993) -5, the discharge port 7 of the pump 4
Between the discharge port 7 and the chemical liquid tank 6, the discharge pressure of the chemical liquid 64 discharged from the discharge port 7 is adjusted, and the chemical liquid 64 is discharged at a constant discharge pressure.
Is discharged from the discharge port 7 and the remaining chemical solution 6 is returned to the chemical solution tank 6. In the figure, 67 is a pressure adjustment knob, 68 is a valve body, 69 is a biasing spring, 70 is an opening / closing valve, and 71 is a valve lever.

As shown in FIG. 1, the pump 4 has a discharge pressure control valve 26 disposed at the upper left end of the casing 24,
An opening / closing lever 72 of an opening / closing valve 61 is provided at the front left end of the casing 24.
And the three-way lever 73 of the three-way valve 62 are arranged at an interval vertically.

That is, the pump 4 includes a pressure adjusting knob 67, a valve lever 71, and an opening / closing lever on the front left side of the base 2.
An operation unit 74 including a 72 and a three-way lever 73 is centrally disposed.

On the other hand, as described above, the prime mover 3 has an exhaust portion 21 composed of a muffler case 19 and an exhaust pipe 20 on the rear right side of the base 2, and the prime mover 3 including the cylinder case 18 in the exhaust portion 21. The high-temperature section 75 is centrally disposed, and the high-temperature section 75 and the exhaust section 21 of the motor 3 are arranged as far as possible from the operation section 74 of the pump 4.

As described above, since the operating section 74 of the pump 4 is arranged as far as possible from the high-temperature section 75 of the prime mover 3, when the operator operates the operating section 74 of the pump 4, It is possible to prevent a person's body from accidentally coming into contact with the high-temperature portion 75 of the prime mover 3 and improve the safety of the power sprayer 1.

Further, since the operating section 74 of the pump 4 is arranged as far as possible from the exhaust section 21 of the prime mover 3, the exhaust of the prime mover 3 may come into contact with the worker's body during the operation of the pump. Therefore, the usability of the power sprayer 1 can be improved without giving the operator any discomfort.

As shown in FIGS. 7 to 9, the casing 24 of the pump 4 is provided with a cam body accommodating case 76 for accommodating the eccentric cam body 30, and is provided at both left and right ends of the cam body accommodating case 76. A pair of left and right cylinder cases 77, 77 'that respectively house the left and right actuators 31, 31' to form a cylinder 48.
And a pair of left and right cylinder heads 78, 78 'connected to the ends of the cylinder cases 77, 77', respectively.

The left and right cylinder cases 77 and 77 'and the cylinder heads 78 and 78' are made of synthetic resin having the same shape.

Cylinder cases 77, 77 'are attached to the left and right ends of the cam body housing case 76 in a watertight manner with six bolts 79. The bolts 79 are connected to the cylinder cases 77, 77' and the cylinder heads 78, 78. The female screw 82 formed in the cam body housing case 76 is inserted into the bolt insertion holes 80 and 81
Screwed on.

Further, the cylinder heads 78, 78 'at the left and right ends are provided.
Are connected by being tightened with two bolts as tightening members 83.

As described above, the left and right cylinder heads 7
8, 78 'are tightened and connected by the tightening member 83, so that the cam body accommodating case 76 and the left and right cylinder cases 77, 77' are connected by the tightening force of the tightening member 83. 78 '
The left and right cylinder cases 77, 77 'are firmly pressed by the cam body housing case 76, and the cylinder heads 78, 78' are firmly pressed by the cylinder cases 77, 77 '. Bolt 79 due to vibration of operating parts 28, 28 '
Can be prevented, and the watertight state of the pump 4 can be ensured well.

Further, since the left and right cylinder cases 77, 77 'and the cylinder heads 78, 78' have the same shape, the left and right cylinder cases 77, 77 'and the left and right cylinder heads 78, 78' are formed using the same molding die. 78 'can be molded, pump 4
The manufacturing cost can be reduced.

Further, by making the cylinder cases 77, 77 'and the cylinder heads 78, 78' made of synthetic resin, the power sprayer 1 can be reduced in weight and the power sprayer 1 can be easily carried. As a result, the usability of the power sprayer 1 can be improved.

[0082]

The present invention is embodied in the form described above and has the following effects.

(1) According to the first aspect of the present invention, a pump is connected to the prime mover, and a chemical tank is connected to a suction port of the pump, and a spray hose is connected to a discharge port of the pump. In the power atomizer, the prime mover is mounted on the base, and the pump is supported by the prime mover.Therefore, there is no need to mount the pump on the base, and the pump can be assembled simply by directly attaching the pump to the prime mover. The maintenance of the pump can be performed simply by removing the pump, and the assemblability and maintainability of the power sprayer can be improved.

Further, by directly attaching the pump to the prime mover, the pump vibrates together with the prime mover along with the vibration of the prime mover, so that the external force acting on the connecting part between the prime mover and the pump can be reduced, and the connecting part can be reduced. Damage can be prevented.

(2) According to the second aspect of the present invention, since the operating part of the pump is arranged as far as possible from the high temperature part of the prime mover, when the operator operates the operating part of the pump, Further, it is possible to prevent the worker's body from accidentally coming into contact with the high-temperature portion of the prime mover, thereby improving the safety of the power sprayer.

(3) According to the third aspect of the present invention, since the operating part of the pump is arranged as far as possible from the exhaust part of the prime mover, the exhaust of the prime mover is discharged to the operator's body during the operation of the pump. No contact, no discomfort to workers,
The usability of the power sprayer can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a power sprayer according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 is a front sectional view showing a pump.

FIG. 5 is a sectional plan view of the same.

FIG. 6 is a sectional view taken along line II of the support structure of the eccentric cam body.

FIG. 7 is a front sectional view showing a casing of the pump.

FIG. 8 is a sectional plan view of the same.

FIG. 9 is a right side view of the same.

FIG. 10 is an explanatory view showing a chemical spraying operation of the power sprayer.

FIG. 11 is an explanatory view showing a chemical liquid collecting operation of the power sprayer.

FIG. 12 is an explanatory diagram showing a moving direction of a cylinder of a prime mover and an actuator of a pump.

FIG. 13 is a right side view showing a joint and a cap.

FIG. 14 is a rear view showing the cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power atomizer 2 Base 3 Motor 4 Pump 5 Inlet 6 Chemical tank 7 Discharge port 8 Spray hose 9 Spray nozzle 16 Engine 17 Cylinder 18 Cylinder case 19 Muffler case 20 Exhaust pipe 21 Exhaust part 22 Fuel tank 24 Casing 25 Pump body 26 Discharge pressure control valve 27 Pump drive unit 28,28 'Pump operation unit 29 Output shaft 30 Eccentric cam body 31,31' Actuator 59 Bypass pipe 60 Bypass flow path 61 Open / close valve 62 Three-way valve 63 Flow path switching means 64 Chemical liquid 65 Chemical liquid Spray channel 66 Chemical recovery channel 67 Pressure control knob 71 Valve lever 72 Open / close lever 73 Three-way lever 74 Operating section 75 High temperature section

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuyasu Osumi 1-32 Chayamachi, Kita-ku, Osaka-shi, Osaka F-term in Yanmar Agricultural Machinery Co., Ltd. (Reference) 2B121 CB02 CB24 CB42 CB47 CB51 CB53 CB61 CB66 FA05 FA07 FA15 4F033 RD01 RE01 RE06 RE08 RE11 RE19

Claims (3)

[Claims] A motor (3) is connected with a pump (4) in an interlocking manner.
In a power atomizer, a chemical tank (6) is connected to the suction port (5) of the pump (4), and a spray hose (8) is connected to the discharge port (7) of the pump (4). Attach the motor (3) to the base (2) and use the same motor (3) to pump
A power sprayer characterized by supporting (4). The operating part (74) of the pump (4) is a motor (3)
2. The power sprayer according to claim 1, wherein the power sprayer is arranged as far as possible from the high temperature section (75). The operating part (74) of the pump (4) is provided with a motor (3).
The power sprayer according to claim 1, wherein the power sprayer is disposed as far as possible from the exhaust part (21).