JP2000245325A - Sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a usual sprayer constituted by installing a shutter device between a chemical tank and a blower case is difficult to carry out a uniform and stable spraying, as a large amount of a chemical falls on the shutter device to cause bad conditions such as clogging or the like and the chemical in the chemical tank is biasedly consumed to cause the dispersion in a sprayed amount. SOLUTION: In this sprayer, a powder feed-stabilizing plate 21 covering above shutter devices 47, 48 is installed in the under portion of a chemical tank 1, the area of the powder feed-stabilizing plate 21 is made larger than that of the shutter devices 47, 48 in the planar view, a rectification protrusion 21b protruding toward outward is formed on a part of the periphery of the powder feed-stabilizing plate 21 and a rectification guide 21c protruding toward below the lower surface of the powder feed-stabilizing plate 21 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprayer such as a backpack type power sprayer, and more particularly to a sprayer capable of stably spraying with a uniform amount of spraying.

[0002]

2. Description of the Related Art Conventionally, a backpack type power spreader in which a shutter device is interposed between a medicine tank and a blower case so that the amount of medicine dropped from the medicine tank into the blower case can be adjusted by the shutter device. Sprayers such as are known. The shutter device is constituted by, for example, a damper shutter capable of spraying a large amount and a rotary shutter for spraying a small amount. Then, the medicine dropped from the medicine tank and passed through the shutter device enters the blower case, and is sprayed through the injection pipe by blowing air from a blowing fan provided in the blower case.

[0003]

However, in the above-mentioned spreader, since the opening area of the lower end of the medicine tank is large,
A large amount of medicine will fall on the shutter device at one time. When a large amount of medicine falls on the shutter device at one time as described above, if the medicine has good fluidity, it quickly passes through the shutter device and flows into the blower case. -If a drug such as a drug containing impurities has poor fluidity, it may accumulate on the shutter device and cause problems such as clogging. Also, due to the distribution of the flow of air from the blower fan in the blower case and the shape of the medicine tank, the amount of medicine falling differs depending on the location in the medicine tank. When the spraying of the medicine is continuously performed, the spraying amount sometimes varies. Further, the medicine flowing through the shutter device and flowing into the blower case is guided to the injection tube by the air from the blower fan, but the flow of the air is disturbed in the blower case, and the medicine flows smoothly to the injection tube. In some cases, the guide was not guided, or flowed backward above the shutter device. Then, in this invention, the said problem is solved and the spraying machine which can perform a uniform and stable spraying is provided.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, according to the first aspect, in a sprayer in which a shutter device is interposed between a medicine tank and a blower case, a dusting stabilizing plate that covers an upper part of the shutter device is provided in a lower part of the medicine tank, and is viewed in plan. , The area of the powder stabilizing plate was larger than the area of the shutter device.

According to a second aspect of the present invention, a rectifying projection is formed on a part of the outer periphery of the dust stabilizing plate so as to project outward, and a rectifying guide is formed on the lower surface of the dust stabilizing plate so as to project downward.

According to a third aspect of the present invention, in a sprayer having a shutter device interposed between a medicine tank and a blower case, a medicine guide guide tube for guiding a medicine passing through the shutter device to a jet tube is provided in the blower case. An air guide plate is provided in the medicine guide tube for guiding the air blown from the blower fan introduced into the medicine guide tube toward the distal end of the medicine guide tube.

[0007]

Next, an embodiment of the present invention will be described. 1 is a front view of a backpack type power spreader, FIG. 2 is a side view thereof, FIG. 3 is a perspective view showing a lever guide portion, FIG. 4 is a cross-sectional view showing a fixed rotation position of an accelerator lever, and FIG. FIG. 6 is a front sectional view showing the storage section and its peripheral portion.
7 is a plan view showing the shutter housing portion, FIG. 7 is a side sectional view showing the shutter housing portion and its peripheral portion, FIG. 8 is a front sectional view showing a state where the rotary shutter is opened, and FIG. 9 is a state where the damper shutter is opened. FIG. 1 is a front sectional view showing
0 is a plan view showing a medicine guide guide cylinder, FIG. 11 is a plan view showing a powder discharge stabilizing plate inside a medicine tank, FIG. 12 is a side view showing a tank stopper, and FIG. 13 is a case where a tank unit is attached and fixed to a blower case. FIG. 14 is a view showing the operation state of the tank stopper when the tank unit is removed from the blower case, FIG. 15 is a rear view showing the opening and closing mechanism of the rotary shutter and the damper shutter, and FIG. FIG. 17 is a diagram showing the rod fixing bracket when the rod fixing bracket is attached to the operation pin. FIG. 17 is a view showing the rod fixing bracket attached to the operation pin.

First, the overall configuration of the sprayer according to the present invention will be described. The spreader shown in FIGS. 1 and 2 is, for example,
It is configured as a backpack type power spreader, in which a medicine tank 1 is arranged at an upper part and a blower case 2 is arranged at a lower part. The chemical tank 1 and the blower case 2 are integrally formed by blow molding a resin. still,
The medicine tank 1 and the blower case 2 are formed separately from each other.

An engine 26 is arranged on the front side (right side in FIG. 2) of the blower case 2, and a blower fan (not shown) is arranged in the blower case 2. The blower fan is fixed to an output shaft of the engine 26, and is configured to rotate integrally with the output shaft to blow air. The medicine tank 1, the blower case 2, the engine 26 and the like are placed on a backpack frame 3 formed in a substantially "L" shape in side view. The engine 26 is provided with a fuel tank 7 and an air cleaner 8. The fuel tank 7 is the engine 2
6 is provided below the fuel tank 7, a pulse pump 9 is provided above the fuel tank 7 in order to forcibly send fuel to the engine 26 above.

A shutter housing 25 is interposed between the medicine tank 1 and the blower case 2, and a rotary shutter device 47 is provided in the shutter housing 25.
And a damper shutter device 48, and a jet port 2 provided at one side (the right end in FIG. 1) of the blower case 2.
The injection pipe 5 is connected to a. A lever guide 4 is provided on the other side of the blower case 2, and an accelerator lever 34 is rotatably attached to the lever guide 4, and a medicine metering lever 33 is connected to the rear of the lever guide 4 (FIG. 2). To the left).

By rotating the metering lever 33, the metering rod 35 connected to the metering lever 33 moves up and down, thereby changing the opening of the rotary shutter device 47 or the damper shutter device 48. To adjust the amount of medicine to be sprayed. Further, by rotating the accelerator lever 34, the number of revolutions of the engine 26 can be changed, and the amount of air blown from the blower fan in the blower case 2 driven by the engine 26 can be adjusted.

As shown in FIGS. 3 and 4, the lever guide 4
A plurality of projections 4a for positioning the accelerator lever 34 are formed on the rotation trajectory of the accelerator lever 34, and the projection 4a and the fitting recess 34a formed on the accelerator lever 34 can be fitted. It is configured. Thus, when the accelerator lever 34 is rotated, the accelerator lever 34 can be fixed at the position where the projection 4a is formed, and the rotation speed of the engine 26 adjusted by the accelerator lever 34 and the airflow from the blower fan are adjusted. It is possible to stably spray a certain amount of medicine while maintaining the air volume. Further, the accelerator lever 34 can be easily rotated to the same rotation position repeatedly, and the accelerator lever 34 can be easily rotated.
Can be easily rotated. Since the accelerator lever 34 is formed of a flexible member such as a resin, as shown in FIG. 4, the fitting state between the protrusion 4a and the fitting recess 34a is easily released during the rotation operation. be able to.

In the blower case 2, the medicine guide guide tube 2 extends from below the rotary shutter device 47 and the damper shutter device 48 to the vicinity of the jet port 2a.
7 are provided, and the medicine guide tube 27
The medicine that has fallen from the medicine tank 1 and has passed through the shutter devices 47 and 48 and has entered the blower case 2 is guided to the injection pipe 5.

While the sprayer constructed as above is carried in a field, the blower fan in the blower case 2 is driven by the driving of the engine 26, and the rotation speed of the accelerator lever 34 is used to change the engine speed so that the blowing amount is increased. While adjusting the spray amount of the medicine by changing the opening degree of the rotary shutter device 47 or the damper shutter device 48 by rotating the metering lever 33,
The medicine is sprayed through the jet tube 5.

Next, the configuration of the shutter housing portion 25 and its peripheral portion will be described. As shown in FIGS. 5 to 7, a shutter frame 11 is disposed in a shutter storage section 25 between the medicine tank 1 and the blower case 2.
The shutter frame 11 is integrally formed with a shutter upper plate 15 that is inclined downward from the outer peripheral side toward the center. A rotary shutter upper plate 15a is formed on one of the left and right sides of the shutter upper plate 15 to open a small opening 57 having a small opening area, and a large opening having a large opening area is formed on the other left and right sides. A damper shutter upper plate 15b that opens the portion 56 is formed. And
A rotary shutter device 47 is formed at a portion where the rotary shutter upper plate 15a is formed, and a damper shutter device 48 is formed at a portion where the damper shutter upper plate 15b is formed. And the composite shutter device 46.

The rotary shutter device 47 comprises a rotary shutter upper plate 15a, a small opening 57, and a rotary shutter 49. The rotary shutter 49 is supported by a rotary shutter shaft 51. The rotary shutter shaft 51 is rotatably supported by bearings 11 a and 11 b formed on the shutter frame 11. By rotating the rotary shutter shaft 51, the rotary shutter 49 is integrally rotated up and down. It is configured to work. The shape and area of the rotary shutter 49 are reduced by the small opening 57.
Are formed in accordance with the opening shape and the opening area, and the arrangement position is determined according to the opening position of the small opening 57. When the rotary shutter 49 is rotated downward, the small opening 57 is completely closed by the rotary shutter 49. From this state, the rotary shutter shaft 51 is rotated to operate the rotary shutter 49. When rotated upward, the small opening 57 opens, and the opening area of the small opening 57 changes according to the amount of rotation of the rotary shutter 49.

On the other hand, the damper shutter device 48 includes a damper shutter upper plate 15b and a damper shutter 52, and the damper shutter 52 is supported by a damper shutter shaft 53. The damper shutter 52 is rotatably supported by bearings 11 c and 11 d formed on the shutter frame 11. By rotating the damper shutter shaft 51, the damper shutter 52 is integrally rotated up and down. It is configured to be. The shape and area of the damper shutter 52 are determined according to the shape and area of the large opening 56 and the position of the damper shutter 52 is determined according to the position of the large opening 56. When the damper shutter 52 is rotated upward, the large opening 56 is completely closed by the damper shutter 52. From this state, the damper shutter shaft 53 is rotated to operate the damper shutter 52. When rotated downward, the large opening 56 opens, and the opening area of the large opening 56 changes according to the amount of rotation of the damper shutter 52.

In the present sprayer, one of the rotary shutter device 47 and the damper shutter device 48 configured as described above is opened for spraying according to the amount of spraying. For example, when a small amount of medicine is sprayed, as shown in FIG. 8, the rotary shutter shaft 51 is rotated to rotate the rotary shutter 49 upward to open the small opening 57. As a result, a small amount of medicine falling from the medicine tank 1 enters the blower case 2 through the small opening 57 having a small opening area, and is sprayed from the injection pipe 5. When a large amount of medicine is to be sprayed, as shown in FIG. 9, the damper shutter shaft 53 is rotated to rotate the damper shutter 52 downward to open the large opening 56. As a result, a large amount of medicine similarly enters the blower case 2 through the large opening 56 having a large opening area, and is sprayed from the injection tube 5.

The medicine guiding guide tube 27 for guiding the medicine which has passed through the rotary shutter device 47 or the damper shutter device 48 and has entered the blower case 2 to the injection tube 5 has an air vent 27a. Ventilation from a ventilation fan in the blower case 2 is introduced into the medicine guide guide cylinder 27. The blast introduced into the medicine guide guide tube 27 is
The medicine flows toward the tip of the nozzle and is discharged from the ejection tube 5 to the outside. The medicine passing through each of the shutter devices 47 and 48 is guided to the ejection tube 5 on this air flow.

As shown in FIG. 5, FIG. 10, etc., a baffle plate 28 is disposed in the medicine guide guide tube 27, and the baffle plate 28 is inclined from above the ventilation opening 27a to the bottom surface. 27
b. By providing the air guide plate 28 in this manner, the air introduced into the medicine guide guide tube 27 from the ventilation opening 27a flows through the medicine guide guide tube 27 along the inclined bottom surface 27b while being guided by the air guide plate 28. It will flow toward the tip. Therefore, the air introduced from the ventilation port 27a is supplied to each shutter device 47 in the shutter frame 11.
・ It can be prevented from flowing back to the 48 side,
It is possible to perform uniform and stable spraying while suppressing variation in the amount of sprayed medicine due to turbulence in air blowing.

Further, on both sides of the upper surface of the damper shutter 52 disposed at the large opening 56, a medicine guide 52a projecting upward is formed, and the damper shutter device 48 is formed by the medicine guide 52a. The medicine that falls into the blower case 2 when rotated downward is configured not to spill from both sides of the damper shutter 52. Also, by forming the medicine guide 52a, turbulence generated near the damper shutter device 48 can be prevented, and the medicine is smoothly guided to the medicine guide guide cylinder 27.

As shown in FIGS. 5, 7 and 11,
Above the composite shutter device 46, an anti-dusting plate 21 is provided at a lower portion in the medicine tank 1, and the anti-dusting stabilizing plate 21 has its legs 21a on a fixed base 11f formed on the shutter frame 11. Installed and fixed. The powder stabilizing plate 21 is formed of a plate-like member, and is formed in a substantially elliptical shape or a substantially elliptical shape according to the shape of the medicine tank 1 in a plan view, and has a substantially central portion in the front-rear direction. The shape is raised from the end. Further, in plan view, the dust discharge stabilizing plate 21 has an area larger than the area obtained by adding the opening area of the small opening 57 of the rotary shutter device 47 and the opening area of the large opening 56 of the damper shutter device 48. The opening area of the opening 1a at the lower end of the medicine tank 1 is larger than the opening area. The dust discharge stabilizing plate 21 covers the upper part of the composite shutter device 46 including the rotary shutter device 47 and the damper shutter device 48 and the upper portion of the opening 1a at the lower end of the medicine tank 1.

As described above, the powder stabilizer 2 is provided in the medicine tank 1.
1 and the upper part of the composite shutter device 46 and the upper part of the opening 1a at the lower end of the medicine tank 1
The medicine stored in the medicine tank 1 is temporarily deposited on the dust stabilizing plate 21, and then gradually falls down from the peripheral edge of the dust stabilizing plate 21, and the medicine stabilizing plate 21 The powder is gradually supplied to the lower side of the powder stabilizing plate 21 through the gap between the powder tank and the wall surface of the medicine tank 1. Accordingly, a large amount of the drug does not drop and accumulate on the composite shutter device 46 at one time, and thus the clogging of the drug can be prevented.

In the case where the medicine in the medicine tank 1 is sprayed through the shutter devices 47 and 48, in the conventional spraying machine, the distribution of the air flow from the blower fan and the shape of the medicine tank 1 affect the spraying. However, the amount of the medicine dropped according to the location in the medicine tank 1 was different, and the medicine in a specific location in the medicine tank 1 was to be consumed unevenly. However, the present sprayer is configured as follows. The medicine is uniformly consumed in each part in the medicine tank 1.

That is, as shown in FIG.
Rectifying protruding portion 21b which protrudes outward in a part of the outer periphery of 1
Is formed, and the rectifying protrusion 21b is arranged at a place where a large amount of medicine falls. Thereby, as shown in FIG. 7, the gap between the powder discharge stabilizing plate 21 in the portion where the rectifying projection 21b is formed and the wall surface of the medicine tank 1 becomes narrower than the gap in the other portion.
The portion where the rectifying projection 21b is formed makes it difficult for the medicine to fall. Further, a plurality of rectifying guides 21c protruding downward are formed on the lower surface of the powder discharge stabilizing plate 21. Rectifying guide 2
By forming 1c, the medicine falling from the outer peripheral portion of the dust stabilizing plate 21 is prevented from dropping intensively at a specific location in the shutter frame 11, and thus drops uniformly. In this way, by forming the rectifying projection 21b and the rectifying guide 21c on the powder discharge stabilizing plate 21, the medicine in the medicine tank 1 is uniformly consumed in each part, and the medicine is evenly distributed in each part in the shutter frame 11. , It is possible to spray the medicine uniformly and stably.

As shown in FIG. 5, a lower end portion of the medicine tank 1 is fitted on the outer peripheral portion of the shutter frame 11 from above, and a mounting stay 31 divided into two front and rear portions is provided.
31 are fitted respectively from the front and rear directions. The mounting stays 31 are integrally fastened by bolts or the like, whereby the shutter frame 11, the chemical tank 1,
And the mounting stays 31 are integrally assembled to form the tank unit 101.

At the left and right ends of the mounting stays 31,
A tank stopper 61 is attached, and the tank unit 101 integrally mounted is detachably attached to and fixed to the blower case 2 by the tank stopper 61. The tank stopper 61 includes a stopper operation lever 62 rotatably supported by the mounting stays 31 by a support shaft 62a, a stopper arm 63 rotatably mounted on the stopper operation lever 62 by a rotation shaft 63a, and Stopper arm 6
3 is constituted by a stopper 64 that is screwed into the stopper 3.
A locking projection 63b is formed on the stopper arm 63, and a locking portion 64a is formed at the lower end of the stopper 64. Then, the stopper operating lever 62 is rotated to lock the locking portion 64a of the stopper 64 to the receiving metal fitting 65 fixed to the blower case 2 like the left tank stopper 61 shown in FIG. By doing
The tank unit 101 is attached and fixed to the blower case 2.

Next, a procedure for mounting and fixing the tank unit 101 to the blower case 2 and a procedure for releasing the fixing will be described. First, the tank unit 101 is connected to the blower case 2
When the tank unit 101 is mounted on the blower case 2, the tank stopper 61 shown on the right side of FIG. 5 and the tank stopper 61 shown in FIG.
, The stopper operation lever 62 is rotated downward,
The stopper 64 a of the stopper 64 is positioned below the fitting 65. From this state, as shown in FIG. 13, the stopper operation lever 62 is rotated upward until the engaging portion 64a of the stopper 64 is engaged with the receiving fitting 65 on the blower case 2 side.

When the stopper operating lever 62 is further rotated upward after the locking portion 64a of the stopper 64 is locked to the receiving metal member 65, the receiving metal member 65 constituted by a leaf spring-like member having elasticity is used. 64a lifts it upward. In this state, the stopper 64 and the stopper arm 63 are urged downward by the urging force of the receiving bracket 65, and the stopper operation lever 62 connected to the stopper arm 63 and the rotation shaft 63a is also moved in the downward rotation direction. Be inspired. When the stopper operation lever 62 is rotated upward to the position shown by the imaginary line in FIG. 13, the rotation shaft 63a exceeds the dead point, and the stopper operation lever 6
2, the tank unit 101 is fixed to the blower case 2 while being rotated upward.

Conversely, to release the fixed state of the tank unit 101 to the blower case 2, the stopper operating lever 62 in the upwardly rotated state is rotated downward as shown in FIG. The locked state between the locking portion 64a and the receiving fitting 65 is released. Thereafter, when the stopper operation lever 62 is rotated upward, that is, in the mounting and fixing direction, as shown by the imaginary line in FIG. The stopper arm 63 rotates upward together with the stopper operation lever 62. Stopper arm 63
When is rotated upward, the locking portion 64a of the stopper 64 moves from the lower position to the outer position of the receiving bracket 65.

After releasing the locking state between the locking portion 64a of the stopper 64 and the receiving bracket 65, the tank unit 10
1 is lifted upward, as shown in FIG.
a is located below the receiving fitting 65, the locking portion 6
4a is hooked on the receiving bracket 65, and the tank unit 1
01 cannot be removed from the blower case 2 smoothly, but as described above, the locking portion 64a is positioned outside the metal fitting 65 so that when the tank unit 101 is lifted upward, it is received with the locking portion 64a. The tank unit 101 can be smoothly removed from the blower case 2 by preventing the metal fitting 65 from being caught. As described above, the locking projection 63 is attached to the stopper arm 63.
When the tank unit 101 is detached, the stopper operation lever 62 is rotated in the mounting and fixing direction so that the locking portion 64a of the stopper 64 is moved to the outside of the fitting 65 so that the stopper 64 is moved. It can be prevented from locking to the blower case 2 side.
Thereby, the tank unit 101 is connected to the blower case 2
Can be removed smoothly, and the workability of the removal work can be improved.

When the tank unit 101 is fixedly mounted on the blower case 2, the locking portion 64a of the stopper 64 is received so that the stopper arm 63 does not rotate upward together with the stopper operating lever 62 which rotates upward. The stopper operation lever 62 is rotated while being pressed so as to be located below the metal fitting 65. Stopper arm 6
Since the locking projection 63b formed on the front end 3 has a substantially spherical tip, when the stopper operation lever 62 is rotated upward while pressing the stopper 64 so as not to move, the stopper operation lever 62 is engaged. The stopper protrusion 63b is expanded outward, and the locking protrusion 63b is no longer locked to the stopper operation lever 62, so that only the stopper operation lever 62 rotates upward.

Next, the opening and closing mechanism of the rotary shutter device 47 and the damper shutter device 48 will be described. As shown in FIGS. 6 and 15, one end of the rotary shutter shaft 51 and one end of the damper shutter shaft 53 protrude to the outside, and one end of the rotary shutter shaft 51 has a rotary that rotates integrally with the rotary shutter shaft 51. A shutter shaft lever 71 is fixedly provided, and one end of the damper shutter shaft 53 is provided at one end of the damper shutter shaft 53.
A damper shutter shaft lever 72 that rotates integrally with the damper shutter shaft 72 is fixedly provided. A link shaft 58 is rotatably supported by a bearing 11e of the shutter frame 11 between the rotary shutter shaft 51 and the damper shutter shaft 53. One end of the link shaft 58 protruding to the outside is A link lever 73 that rotates integrally with the link shaft 58 is fixedly provided.

A link pin 72a is formed at one end of the damper shutter shaft lever 72.
Is a link pin 73c formed on the link lever 73.
And a link arm 74. And
When the link lever 73 is turned up and down, the damper shutter shaft lever 72 is turned via the link arm 74, whereby the damper shutter shaft 53 is turned and the damper shutter 52 is opened and closed.

The link lever 73 is provided with a first operation pin 73a and a second operation pin 73b arranged at a position different from the first operation pin 73a from the damper shutter shaft 53. The first operation pin 73a
Alternatively, a rod fixing bracket 36 fixed to the upper end of the metering rod 35 is detachably attached to the second operation pin 73b, and the damper shutter 52 is opened and closed. That is, the rod fixing bracket 36 is used for the measuring rod 3.
5 and is fixed to the metering lever 33. When the metering lever 33 is rotated, the metering rod 35 moves up and down, thereby being connected to the metering rod 35 by the rod fixing bracket 36. The link lever 73 is turned up and down, and the damper shutter 52 opens and closes as described above.

On the other hand, the rotary shutter 49 is configured to open and close by rotating the rotary shutter shaft lever 51 up and down to rotate the rotary shutter shaft 51. An operation pin 71a is formed on the rotary shutter shaft lever 71, and the rod fixing bracket 36 is detachably attached to the operation pin 71a, and the rotary shutter 49 is opened and closed in the same manner as the damper shutter 52 described above. It is configured to perform an operation.

The rod fixing bracket 36 includes a link lever 73
Alternatively, it can be attached to either one of the rotary shutter shaft levers 71 and the damper shutter 52 or the rotary shutter 4
9 can be opened and closed. When the damper shutter 52 is opened and closed, the rod fixing bracket 3 is used.
The opening / closing amount of the damper shutter 52 with respect to the rotation amount of the metering lever 33 can be changed by attaching the 6 to the first operation pin 73a or the second operation pin 73b. That is, since the first operation pin 73a is disposed closer to the link shaft 58 that is the center of rotation of the link lever 73 than the second operation pin 73b, the first operation pin 73a and the second operation pin 73b When the first operation pin 73a is moved up and down by the same dimension, the rotation angle of the link lever 73 becomes larger and the damper shutter 52 can be opened and closed greatly.

Therefore, when it is desired to increase the maximum spray amount of the medicine, the rod fixing bracket 36 is attached to the first operation pin 73a so that the opening / closing amount of the damper shutter 52 with respect to the rotation operation amount of the metering lever 33 is increased. When it is desired to reduce the maximum amount of the medicine to be sprayed, the rod fixing bracket 36 is connected to the second operation pin 73b so that the opening / closing amount of the damper shutter 52 with respect to the rotation operation amount of the metering lever 33 becomes small.
It should be attached to. When a small amount of spray is to be performed with a smaller spray amount than when the rod fixing bracket 36 is attached to the second operation pin 73b, the rod fixing bracket 36 is connected to the operating pin 7 of the rotary shutter shaft lever 71.
What is necessary is just to attach to 1a and open / close the rotary shutter 49.

One end 75a of the link lever 73 or the rotary shutter shaft lever 71 not attached to the rod fixing bracket 36 has the other end 75a of the link stopper 75 rotatably mounted on the mounting stay 31. Of the damper shutter 52 or the rotary shutter 49, which is not operated to be opened and closed, is kept closed. For example, as shown in FIG. 15, when the rod fixing bracket 36 is attached to the first operation pin 73a of the link lever 73 so that the damper shutter 52 can be opened and closed, the engagement hole 75b of the link stopper 75 is connected to the rotary shutter. The rotary shutter 49 is kept closed by engaging with the operation pin 71a of the shaft lever 71.

Next, each operating pin 7 of the rod fixing member 36
The structure for attaching to and detaching from 1a, 73a and 73b will be described with reference to FIGS. Although FIGS. 16 and 17 show an example in which the rod fixing member 36 is attached to the operation pin 71a, the case of the first and second operation pins 73a and 73b is similarly configured. A fitting hole 36a for fitting to the operation pin 71a is formed in the rod fixing member 36 shown in FIGS.
It is attached so as to be rotatable around. A leaf spring 38 is interposed between the stopper 37 and the rod fixing bracket 36,
The upper portion 37b of the stopper 37 is urged toward the rod fixing bracket 36 by the leaf spring 38. The stopper 3
An engagement portion 37d is formed on an upper portion 37b of the seventh.

The outer peripheral surface of the distal end portion 71b of the operation pin 71a is formed in a substantially spherical shape, and the base portion 7b of the operation pin 71a is formed.
1c is formed smaller in diameter than the tip portion 71b. The operation pin 71a is opposite to the operation pin 71a of the fitting hole 36a.
Of the fitting hole 36
a of the operating pin 71a is the tip 71 of the operating pin 71a.
The fitting hole 36a is formed so as to fit to the maximum outer diameter of the front end portion 71b so that the fitting hole 36a can be fitted to and removed from the front end portion 71b.

Then, the rod fixing bracket 36 is connected to the operation pin 7.
In the case of attaching to the rod 1a, as shown in FIG. 16, the lower part 37c of the stopper 37 is pressed against the rod fixing bracket 36 against the urging force of the leaf spring 38, and the upper part 3 of the stopper 37 is
The engaging portion 37d formed on the 7b is positioned outside the outer periphery of the fitting hole 36a, and in this state, the fitting hole 36a is fitted to the operation pin 71a. Insert the fitting hole 36a into the operation pin 71a.
17, after the lower part 37c of the stopper 37 is released from being pressed, the upper part 37b of the stopper 37 is urged toward the rod fixing bracket 36 and the engaging part 3 is engaged.
7d enters inside the outer periphery of the fitting hole 36a, engages with the base 71c of the operation pin 71a, and the rod fixing bracket 36 is attached and fixed to the operation pin 71a.

When the rod fixing member 36 is attached to the operation pin 71a in this manner, the engagement portion 37d of the stopper 37 is located at the base 71c of the operation pin 71a inside the outer periphery of the fitting hole 36a, that is, when the operation is performed. Since the pin 71a is located inside the tip portion 71b, the engagement portion 37
d is engaged with the distal end portion 71b of the operation pin 71a, thereby preventing the rod fixing fitting 36 fitted to the operation pin 71a from coming off. When removing the rod fixing bracket 36 fixed to the operation pin 71a, the stopper 3
7 can be easily removed by pressing the lower portion 37c toward the rod fixing bracket 36 to release the engagement of the engaging portion 37d with the distal end portion 71b. Also, the rod fixing bracket 36
The shape of the fitting hole 36a is the tip 71b of the operation pin 71a.
The fitting hole 36a
The fitting position can be easily adjusted when fitting to the operation pin 71a, and the mounting work of the rod fixing bracket 36 can be facilitated.

As described above, the rod fixing member 36 can be easily attached to and detached from the operation pin 71a, and the engaging portion 37d of the stopper 37 can be used to prevent the rod fixing member 36 from coming off. The work of replacing the fixing bracket 36 with each of the operation pins 71a, 73a, 73b is facilitated, and the rod fixing bracket 36 can be securely attached and fixed to each of the operation pins 71a, 73a, 73b.

[0045]

As described above, the present invention has the following advantages. That is, as set forth in claim 1, a dust stabilizer provided to cover the upper part of the shutter device in the lower part of the medicine tank, and the area of the dust stabilizer in a plan view is configured to be larger than the area of the shutter device. The medicine stored in the medicine tank is temporarily deposited on the dust stabilizer, and then gradually falls downward from the peripheral edge of the dust stabilizer, and the medicine between the dust stabilizer and the wall surface of the medicine tank is dropped. It is supplied gradually below the dust stabilizing plate through the gap. This prevents a large amount of medicine from dropping and accumulating on the composite shutter device at one time, and prevents clogging of the medicine.

According to a second aspect of the present invention, a rectifying projection is formed on a part of the outer periphery of the dust stabilizing plate, and a rectifying guide is formed on a lower surface of the dust stabilizing plate. Therefore, the portion where the rectifying protrusion is formed makes it difficult for the medicine to fall, and the medicine that falls downward from the outer peripheral portion of the dust stabilizing plate by the rectifying guide concentrates and drops at a specific location in the shutter frame. Is prevented, and it falls evenly. Therefore, the rectifying projection is formed at a position where the medicine is easily dropped, and by forming the rectifying guide, the medicine in the medicine tank is uniformly consumed in each part, and the medicine is uniformly distributed to each part in the shutter frame. , It is possible to spray the medicine uniformly and stably.

According to a third aspect of the present invention, a medicine guide guide tube for guiding the medicine passing through the shutter device to the jet tube is provided in the blower case, and the blowing fan is introduced into the medicine guide guide tube. The air guide plate that guides the blast from the medicine guide guide tube toward the tip direction is provided, so that the air introduced into the medicine guide guide tube moves in the medicine guide guide tube in the tip direction while being guided by the air guide plate. It will flow. Therefore, it is possible to prevent the air introduced from the ventilation opening from flowing back to each shutter device side in the shutter frame, and to suppress a variation in the amount of the medicine sprayed due to the turbulence of the air blow, thereby achieving a uniform and stable spray. It is possible to do.

[Brief description of the drawings]

FIG. 1 is a front view of a backpack type power spreader.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing a lever guide portion.

FIG. 4 is a cross-sectional view showing a fixed state of a rotation position of an accelerator lever.

FIG. 5 is a front sectional view showing a shutter housing portion and a peripheral portion thereof.

FIG. 6 is a plan view showing a shutter storage unit.

FIG. 7 is a side sectional view showing a shutter housing portion and a peripheral portion thereof.

FIG. 8 is a front sectional view showing a state where a rotary shutter is opened.

FIG. 9 is a front sectional view showing a state where a damper shutter is opened.

FIG. 10 is a plan view showing a medicine guide tube.

FIG. 11 is a plan view showing a powder stabilizer in the medicine tank.

FIG. 12 is a side view showing a tank stopper.

FIG. 13 is a diagram showing a tank stopper operating state when the tank unit is attached and fixed to the blower case.

FIG. 14 is a view showing a tank stopper operating state when the tank unit is removed from the blower case.

FIG. 15 is a rear view showing an opening and closing mechanism of a rotary shutter and a damper shutter.

FIG. 16 is a view showing a rod fixing bracket when attaching to a control pin.

FIG. 17 is a view showing a rod fixing bracket attached to an operation pin.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 medicine tank 2 blower case 11 shutter frame 21 powder discharge stabilizing plate 21 b rectifying protrusion 21 c rectifying guide 25 shutter housing 27 medicine guide guide tube 28 air guide plate 46 composite shutter device 47 rotary shutter device 48 damper shutter device 49 rotary shutter 52 Damper shutter

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuhiro Muto 767 Umena, Mishima-shi, Shizuoka F-term in New Delta Industrial Co., Ltd. (reference) 2B121 CB09 CB23 CB28 CB45 CB49 CB53 CB61 FA06 FA11 4F033 QA05 QB02Y QB08X QB12Y QB17 QD03 QD11 QE02 QE19 QE24 QF01X QF08Y

Claims (3)

[Claims] 1. A spraying machine having a shutter device interposed between a medicine tank and a blower case, wherein a dust stabilizer for covering an upper part of the shutter device is provided in a lower portion of the medicine tank, and the sprayer in a plan view is provided. A sprayer characterized in that the area of the powder stabilizer is larger than the area of the shutter device. 2. A rectifying projection protruding outward in a part of an outer periphery of the dust stabilizing plate, and a rectifying guide projecting downward on a lower surface of the dust stabilizing plate. A sprayer according to claim 1, 3. A sprayer having a shutter device interposed between a medicine tank and a blower case, wherein a medicine guide guide tube for guiding a medicine passing through the shutter device to a jet tube is provided in the blower case, and the medicine guide is provided. A sprayer characterized in that an air guide plate is provided in a guide tube for guiding air blown from a blower fan introduced into the medicine guide guide tube toward the tip of the medicine guide guide tube.