JPH0632840Y2 - Residual amount of spraying agent detection device for backpack power spreaders - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a device for detecting a remaining amount of a spraying agent in a backpack-powered spreader which carries a solid or liquid spraying agent on the back of an operator. The present invention relates to a spraying agent residual amount detecting device for a backpack power spraying machine which detects the amount of the spraying agent remaining from the pressure of the pressure medium.

[Conventional technology]

Japanese Utility Model Publication No. 61-45900 discloses that a spreader main body is supported on a horizontal portion of a lower end portion of a backpack frame through an elastic member, and a pressure chamber is provided between a lower surface of the spreader main body and an upper surface of the elastic member. The residual amount of the spraying agent in the spraying agent tank is detected from the pressure of the pressure medium in the pressure chamber.

[Problems to be solved by the device]

In Japanese Utility Model Publication No. 61-45900, since the elastic member and the pressure chamber are provided separately, the number of parts as a whole is increased, and the spreader body is raised by the size of the pressure chamber.
The backpack power spreader is getting larger.

An object of the invention of claim 1 is to provide a spraying agent residual amount detecting device for a backpack power spreader capable of reducing the number of parts and reducing the size of the lower surface of the spreader body and the horizontal portion of the backpack frame. is there.

The object of the invention of claims 2 and 3 is to provide an advantageous construction of the support device according to claim 1.

[Means for Solving the Problems]

The invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The back spread power spreader (10), which is a prerequisite for the spread agent remaining amount detecting device according to claim 1, has a back cover frame (12) having a horizontal portion (18) projecting rearward at a lower end portion, and a spread agent tank (10). 30) including the spreader body (20) and the lower and horizontal parts of the spreader body (20).
The weight of the spreader main body (20) is placed between the horizontal part (18) and
And a supporting device (32, 80) for supporting. And
In this backpack power spreader (10), in the spreader residual amount detection device, the support device (32, 80) is an elastic member (48) that receives the weight of the spreader main body (20), and this elastic member (48). A pressure chamber (56) formed therein and filled with a pressure medium (62). In addition, the indicator (44) is arranged in front of the operator, and the pressure chamber (5
Display the remaining amount of spraying agent corresponding to the pressure of the pressure medium (62) in 6).

In the spraying agent remaining amount detecting device of the backpack power spreader (10) according to claim 2, the pipe line (42) and the pressure chamber (56) of the supporting device (32) and the supporting device.
It communicates with the external pressure detector (40) of (32). Indicator (4
4) displays the corresponding value of the detection value of the pressure detection unit (40).

In the device for detecting a remaining amount of the spraying agent of the backpack power spreader (10) according to claim 3, the support device (80) includes a diaphragm (84) partitioning the pressure chamber (56), and a strain attached to the diaphragm (84). It has a gauge (86). The display (44) displays the corresponding value of the detected value of the strain gauge (86).

[Action]

In the invention of claim 1, the elastic member (48) is a spreader main body.
Receives the weight of (20), is compressed in the vertical direction, and elastically deforms due to engine vibration from the spreader body (20),
The transmission of engine vibration from the spreader body (20) to the horizontal portion (18) is suppressed. The pressure chamber (56) receives a compressive force in the vertical direction together with the elastic member (48) due to the weight of the spreader body (20),
The pressure medium (62) in the (56) has a pressure corresponding to the remaining amount of the spraying agent in the spraying agent tank (30). The indicator (44) is arranged at a position visible to the operator, and the pressure medium (62) in the pressure chamber (56) is located.
Displays the corresponding pressure value.

In the invention of claim 2, the pressure of the pressure medium (62) in the pressure chamber (56) is transmitted to the pressure detection unit (40) outside the support device (32) through the pipe line (42), and the pressure is transmitted. The corresponding value of the detection value in the detection unit (40) is displayed on the display unit (44) as the amount of the spraying agent remaining in the spraying agent tank (30).

In the invention of claim 3, the diaphragm (84) is the pressure chamber (56).
Distorted according to the pressure of the pressure medium (62) in the strain gauge
(86) detects the distortion of the diaphragm (84). Strain gauge (86)
The detected value of is sent to the display (44), and the corresponding value is displayed (4
In 4), it is displayed as the remaining amount of spraying agent in the spraying agent tank (30).

〔Example〕

 The present invention will be described below with reference to the embodiments shown in the drawings.

4 and 5 are views of the backpack power spreader 10 as viewed from the rear and side. The backpack frame 12 has a backrest 14 on the worker side.
A vertical portion 16 fixed to the vertical portion 16 and extending in the vertical direction.
And a horizontal portion 18 protruding from the lower end portion of the horizontal portion in the horizontal direction substantially at right angles to the vertical portion 16. The spreader main body 20 includes a blower 22 that generates a carrier air, an engine 24 that drives the blower 22, and a fuel tank that stores the fuel of the engine 24.
26, and the inside of the blower 22 mounted on the blower 22, for example, fertilizer,
And a spray tank 30 for containing sprays 28 such as medicines and seeds. The spreader main body 20 is mounted on the horizontal portion 18 via two supporting devices 32 on the left and right sides at the lower portion, and is coupled to the upper end portion of the vertical portion 16 of the backpack frame 12 via the rubber 34 on the side portions. The operating portion 36 is disposed laterally of the lower end portion of the spreader main body 20, and has a throttle opening degree of the engine 24 and the scattered material tank 30.
A lever is provided to control the amount of the scattered material 28 that is discharged from the. The bent pipe 38 is connected to the outlet of the blower 22 so that the direction in the substantially horizontal direction can be adjusted, and various jet nozzles are connected thereto. Pressure detector
40 is fixed to the lower end on the vertical portion 16 side of the spreader main body 20,
It is connected to the supporting device 32 via a connecting pipe 42. display
44 is a position that is connected to the pressure detection unit 40 via a signal line 46, and is visible by an operator carrying the backpack power spreader 10,
For example, it is attached to the base end portion of the jet nozzle.

FIG. 1 is a vertical sectional view showing a detailed structure of the supporting device 32. The rubber 48 is formed into a cylindrical shape, and has a rigid top plate 50 and bottom plate.
52 are fixed to the upper surface and the lower surface of the rubber 48, respectively.
The screw 54 has an upper end fixed to the bottom plate 52, and is a horizontal part of the backpack frame 12.
It is inserted into 18 predetermined insertion holes. The oil chamber 56 is formed in the rubber 48 so as to open on the upper side, and the lid 58 is screwed into the central hole of the top plate 50 to close the upper end opening of the oil chamber 56. Screw hole 60
Is formed in the center of the upper surface side of the lid 58, and a bolt for fixing the top plate 50 to the lower surface of the spreader main body 20 is screwed. The oil 62 is filled in the oil chamber 56, the connection port 64 is formed in the peripheral portion of the rubber 48, communicates with the oil chamber 56, and is connected to one end of the connecting pipe 42 (FIGS. 4 and 5). It

FIG. 2 is a detailed view of the area including the supporting device 32. nut
66 is screwed into the screw 54 (FIG. 1) of the supporting device 32, and the bottom plate 52
Is fixed to the horizontal portion 18 of the backpack frame 12.

FIG. 3 is a cross-sectional view showing the detailed structure of the pressure detection unit 40. The case 68 is fixed to the lower end portion of the spreader main body 20 on the vertical portion 16 side, and the diaphragm 70 partitions the inside of the case 68 and defines an oil chamber 72 on one side. The connection port 74 is provided outside the case 68, communicates with the oil chamber 72, and is connected to the other end of the connection pipe 42 (FIGS. 4 and 5). This allows
The oil chamber 72 communicates with the oil chamber 56 of the support device 32 via the connecting pipe 42, and the oil 62 is sealed in the space of the oil chamber 56 and the oil chamber 72. The strain gauge 76 is attached to the surface of the diaphragm 70 on the side opposite to the oil chamber 72 and detects the strain of the diaphragm 70. The signal converter 78 performs processing such as amplification,
The detection value of the strain gauge 76 is sent to the display 44 via the traffic light 46.

The operation of the spraying agent remaining amount detecting device of FIGS. 1 to 5 will be described. In the support device 32, the rubber 48 receives the weight of the spreader main body 20, is compressed in the vertical direction, and is elastically deformed in accordance with the engine vibration from the spreader main body 20 to spread from the spreader main body 20 to the horizontal portion 18. Suppresses engine vibration transmission. The oil chamber 56 receives a compressive force in the vertical direction together with the rubber 48 due to the weight of the spreader main body 20, and the oil 62 in the oil chamber 56 becomes a pressure corresponding to the remaining amount of the scattered matter 28 in the scattered matter tank 30. .
The pressure of the oil 62 in the oil chamber 56 is transmitted to the oil chamber 72 of the pressure detection unit 40 via the connecting pipe 42 and distorts the diaphragm 70,
The strain gauge 76 detects the oil chamber 72 from the strain of the diaphragm 70. The detected value of the strain gauge 76 is an indicator arranged at a position where it can be visually recognized by a worker who carries the backpack power spreader 10 on his / her back.
44 via the signal converter 78 and the signal line 46, the display
Reference numeral 44 indicates the remaining amount of the scattered material 28 in the scattered material tank 30.

FIG. 6 is a sectional view showing the structure of another supporting device 80. The same parts as those of the supporting device 32 described above are designated by the same reference numerals and the description thereof will be omitted. The lid 82 is screwed into a screw hole at the center of the top plate 50, and the diaphragm 84 is fixed at its peripheral edge to the edge of the hole in the central recess of the lid 82. The diaphragm 84 is the top plate 50
Since it is at a proper lower position, contact with the lower surface of the spreader main body 20 is avoided. The strain gauge 86 is attached to the upper surface of the diaphragm 84 and connected to the display unit 44 via the signal line 46.
The oil chamber 56 receives a compressive force in the vertical direction together with the rubber 48 due to the weight of the spreader main body 20, and the oil 62 in the oil chamber 56 becomes a pressure corresponding to the remaining amount of the scattered matter 28 in the scattered matter tank 30. . The diaphragm 84 is distorted according to the pressure of the oil 62 in the oil chamber 56, and the strain gauge 86 detects the strain of the diaphragm 84. The detection value of the strain gauge 86 is sent to the display unit 44 via the signal line 46,
The corresponding value is displayed on the display 44 for the scattered material in the scattered material tank 30.
Displayed as 28 remaining.

In the illustrated embodiment, the spraying agent is a solid spraying agent 28, but the backpack power sprayer to which the spraying agent remaining amount detecting device of the present invention is applied stores a liquid such as a chemical solution in a spraying agent tank. It may be one that does.

[Effect of device]

According to the first aspect of the present invention, the pressure chamber is formed in the elastic member that absorbs engine vibration from the spreader main body to the horizontal portion of the backpack frame, is filled with the pressure medium, and has a pressure corresponding to the weight of the spreader main body. To the pressure medium. Therefore, it is not necessary to prepare a case body that forms the pressure chamber separately from the elastic member, and the total number of parts can be significantly reduced. Further, since the elastic member and the pressure chamber overlap each other in the vertical direction, it is possible to prevent the height dimension of the elastic member and the pressure chamber as a whole from being reduced, and to prevent the upper end of the spreader main body from becoming higher.

According to the second aspect of the present invention, the pipe is extended from the supporting device, and the pressure of the pressure medium in the pressure chamber is detected by the pressure detecting portion outside the supporting device, so that the structure of the supporting device can be simplified.

In the invention of claim 3, since the pressure of the pressure medium in the pressure chamber is detected via the diaphragm and the strain gauge arranged in the supporting device, it is not necessary to provide a pressure detecting portion separately from the supporting device. The number of parts is reduced as compared with the invention of claim 2.

[Brief description of drawings]

1 is a vertical sectional view showing a detailed structure of a supporting device, FIG. 2 is a detailed view of a range including the supporting device, and FIG. 3 is a detailed structure of a pressure detecting portion. 4 and 5 are sectional views showing the backpack power spreader as viewed from the rear and side, and FIG. 6 is a sectional view showing the structure of another supporting device. 10 …… backpack power spreader, 12 …… backpack frame, 18 …… horizontal section,
20 …… Sprayer main body, 30 …… Spray material tank (spray agent tank), 32,80 …… Supporting device, 40 …… Pressure detector, 42 ……
Connection pipe (pipe), 44 …… Indicator, 48 …… Rubber (elastic member), 56 …… Oil chamber (pressure chamber), 62 …… Oil (pressure medium), 84 …… Diaphragm, 86 …… Strain gauge.

Claims (3)

[Scope of utility model registration request] 1. A spreader main body (2) including a backpack frame (12) having a horizontal portion (18) projecting rearward at a lower end portion, and a spray agent tank (30).
0) and the lower surface of the spreader main body (20) and the horizontal portion (18) are interposed to reduce the weight of the spreader main body (20) to the horizontal portion (18).
In a backpack power spreader (10) having a supporting device (32, 80) supporting the elastic member (48), the supporting device (32, 80) receives the weight of the spreader main body (20). ) And a pressure chamber (5) formed in the elastic member (48) and filled with the pressure medium (62).
6), and the indicator (44) is arranged in front of the operator,
A spraying agent residual amount detecting device for a backpack power spraying machine, which displays a spraying agent residual amount corresponding to the pressure of the pressure medium (62) in the pressure chamber (56). 2. A conduit (42) is provided for the pressure chamber (5) of the support device (32).
The pressure detector (40) outside the support device (32) is communicated with 6), and the display (44) displays a corresponding value of the detected value of the pressure detector (40). The device for detecting the remaining amount of the spraying agent of the backpack power spreader according to claim 1. 3. The support device (80) has a diaphragm (84) for partitioning the pressure chamber (56) and a strain gauge (86) attached to the diaphragm (84), and the display ( 44. The spraying agent remaining amount detecting device for a backpack power spreader according to claim 1, wherein 44) displays a corresponding value of the detected value of the strain gauge 86.