JPH02284661A - Detection of residual amount in backpack power applicator and detector thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tank remaining amount detection device for detecting the remaining amount of spray material in a spray material tank in a power spreader.

[Conventional technology]

In conventional power spreaders used for spreading materials such as chemicals, fertilizers, and seeds, the blower is mounted on a backpack frame, and the material tank is fixed above the blower via a metering section. There is.

The following is a list of conventional tank remaining amount detection devices for such power spreaders.

(a) A plurality of sensors capable of sensing the presence of the spray material are arranged vertically at appropriate intervals in the spray material tank, and the remaining amount of the spray material is detected based on the output of the sensor.

(Example: Publication of Utility Model Publication No. 16203-1983 and Publication of Utility Model Publication No. 1988-16203)
1.760 Publication) (b) A weight sensor is interposed between the mounting part of the backpack frame and the lower surface of the blower, and the remaining amount of the spray material is detected from the weight. (Example: Utility Model Publication No. 61-45900 and Utility Model Application Publication No. 63-14
(No. 1663) (c) A spring is interposed between the upper spray material tank and the lower blower, and the spray material tank is moved downward by 2" depending on the remaining amount of spray material in the spray material tank, and the spraying is performed. The remaining amount of spray material in the spray material tank is detected from the amount of movement of the material tank. (Example: Japanese Unexamined Patent Publication No. 61-50666) (d) A relatively sliding screw cylinder and cylinder are disposed at the lower part of the blower, and the cylinder chamber and the pressure gauge are communicated via a pipe, A pressure medium is sealed in the cylinder chamber and the pipe line, and the remaining amount of the spray material in the spray material tank is detected from the pressure of the pressure medium. (Example: Japanese Utility Model Publication No. 61-45900) [Problems to be Solved by the Invention] The tank remaining amount detection device of (a) above requires a large number of sensors, which complicates manufacturing and requires continuous residual amount detection. It is difficult to display the amount.

The tank remaining amount detection device described in (b) above can continuously display the remaining amount of spray material, but since the single weight sensor is installed at the bottom of the blower, the engine fuel tank other than the spray material tank, etc. Since the weight is detected including the weight of the fuel, the remaining amount display is affected by the amount of fuel in the fuel tank, making it difficult to accurately display the remaining amount.

The tank remaining amount detection device described in (e) above detects the remaining amount of spray material from non-vibratory displacement, but the mechanism for continuously detecting non-vibratory displacement is complicated.

It is difficult for the tank remaining amount detection device described in (d) above to accurately display the remaining amount for the same reason as in the case (1)).

The object of the invention as claimed in claim 1 is to be able to detect continuous changes in the residual amount of sprayed substances without using a large number of detection parts or complicated detection parts, and to detect the weight of fuel in a fuel tank, etc. To provide a method for detecting the remaining amount of a backpack-powered spreader, which can accurately display the remaining amount of a spray material without being influenced by the above.

An object of the invention as claimed in claim 2 is to provide a remaining amount detection device for a backpack power spreader which is advantageous for implementing the remaining amount detection method of claim 1.

It is an object of the invention as claimed in claim 3 to provide a remaining amount detection device for a backpack power spreader, which is advantageous in providing a detection mechanism.

[Means to solve the problem]

The invention will be described using reference numerals in the drawings that correspond to the embodiments.

According to the method for detecting the remaining amount of a backpack power spreader (10) according to claim 1, the spray material tank (24) stores the spray material (26).
A vibration member (54) is disposed at the lower part of the inside, and the vibration member (54) is supported by the engine vibration transmission section (50) via an elastic support (52), and the inertial body (58) is attached to the vibration member (54). 54) so as to be freely displaceable. Then, the relative vibration between the vibrating member (54) and the inertial body (58) according to the remaining amount of the spray material (26) in the spray material tank (24) causes the spread material (26) in the spray material tank (24) to be reduced. A remaining amount detection device for a backpack power spreader (io) according to a second aspect of the present invention, which is characterized by the remaining amount of water, comprises the following components (a) to e).

(a) Spray material tank (24) for storing spray material (2G)
(b) A vibrating member (54) disposed at the lower part of this spray tank (24) and supported by the engine vibration transmission section (50) via an elastic support (52) (c) This vibrating member (54) ) (d) A detection coil (68) that detects the relative vibration between the vibrating member (54) and the inertial body (58) with a magnet, which is displaceably disposed within (c) this detection. An indicator (46) that displays a value related to the output of the coil (68).In the remaining amount detection device for the backpack power spreader (10) according to claim 3, the shutter (28) is further configured to connect the spray material tank (24).
The centering amount of the spray material (26) from the lower part of the spray material tank (24) can be freely controlled. Vibration member (54
) is a shutter cover (
54).

[Effect]

In the invention of claim 1, engine vibrations are transmitted to the engine vibration transmission section (50), and further, the vibration of the engine is transmitted to the elastic support (50).
52) to the vibrating member (54), and relative vibration is generated between the vibrating member (54) and the inertial body (58).

The vibrating member (54) rotates the spray material (
26) When the remaining amount of the sprayed material (26) is small, it is partially or completely exposed from the sprayed material (26) and receives resistance from the surrounding sprayed materials (26). Vibrates due to engine vibration. Spray tank (24
) The larger the remaining amount of the spread material (26) in the vibrating member (54
) receives a large resistance from the material to be spread (26) as it vibrates, so the relative vibration speed between the vibrating member (54) and the inertial body (58) is the same as the material to be spread (26) in the material tank (24).
) is related to the remaining amount.

In the invention of claim 2, the inertial body with magnet (58) and the vibration member (54) are moved relative to each other due to the engine vibration transmitted from the engine via the engine vibration transmission section (50) and the elastic support (52). This relative vibration is related to the amount of spray material (26) remaining in the spray tank (24). Electromagnetic induction occurs in the detection coil (68) due to the relative vibration of the magnetized inertial body (58) and the vibration member (54),
A voltage related to the speed of relative vibration is developed in the sensing coil (68). The display (46) displays a value related to the voltage of the detection coil (68) for the spray material (2) in the spray material tank (24).
6) is displayed as the remaining amount.

In the third aspect of the invention, engine vibrations are transmitted to the shutter cover (54) from the engine vibration transmitting section (50) via the elastic support (52), and thereby the shutter cover (54) and the inertial body with a magnet ( 58).

〔Example〕

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

FIG. 3 is an overall view of the backpack power spreader 10 equipped with a remaining amount display device.
The blower 12 includes a resin fan case 14, a fan 16 disposed inside the fan case 14 and driven by an engine (not shown), and a scroll-shaped fan 16 formed on the outer circumferential side of the fan 16. It has a ventilation passage 18. The bent pipe 20 is rotatably coupled to the fan case 14 so as to communicate with the downstream end of the ventilation passage 18, and has a discharge port 22.

The spray tank 24 is placed on the top of the fan case 14,
It is fixed and contains powder and granular materials 26 such as medicines, fertilizers and seeds. The shutter 28 is manually operated and swingably disposed in the opening at the bottom of the spray material tank 24, and adjusts the falling amount of the spray material 26 at the opening. The pressurizing passage 30 is formed within the fan case 14 and branches from the middle of the ventilation passage 18 .

The opening 1 at the bottom of the spray tank 24 is reached. The discharge pipe 34 is disposed within the fan case 14, communicates with the opening at the bottom of the spray material tongue 24 at its upper end, opens near the bent pipe 20 at its lower end, and guides the spray material 26 toward the bent pipe 20. . On the downstream side of the bent pipe 20, a flexible pipe 36,
A spout 42 to which the vertical jet head 38 and the sinking multi-hole jet head 40 are connected is formed at the tip of the sinking multi-port jet head 40 so as to open in the axial direction of the sinking multi-port jet head 40;
They are formed in a line at appropriate intervals on the lower surface side of the vertical jet head 38 and the multi-port jet head 40. The collision plate 44 made of a rigid material has longitudinal strips at each of the nozzles 42 except for the two nozzles 42 at the tips of the sinking multi-nosed nozzle 40 so as to protrude inward from the nozzle head 38 and the multiple nozzle nozzle 40. Fountain head 38 and multi-mouthed jet head 4
It is attached from the outer surface side of 0 and directs the spray material 26 toward the nozzle 42 by collision with the spray material 26.

Pressurized air is formed in the air passage 18 by the rotation of the fan 16 of the blower 12, and the spray material 26 in the spray material tank 24 is sent along with the pressurized air to the longitudinal jet [1 jet head 38 and the sinking multi-hole jet head 40]. . In the vertical striped jet head 38 and the sinking multi-port jet 40, the sprayed matter 26 is sent to a range close to the lower surface side of the vertical jet jet 38 and the sinking multi-port jet 40.

It collides with the collision plate 44, is deflected by the collision plate 44 toward the nozzle 42, and is ejected from the nozzle 42 to the outside of the vertical nozzle 38 and the multiple nozzle 40.

The indicator 46 is placed in a position where it can be seen by the operator when the operator is carrying the power spreader 10 on his back and spreading the material to be sprayed, for example, at the joint between the flexible pipe 36 and the vertical nozzle head 38. It is fixed by a band 49. Electrical wire 48 is connected at one end to indicator 46 and inserted into spray tank 24 at the other end.

FIG. 2 is a detailed structural diagram of the lower part of the spray tank 24. The shutter 28 is connected to the fan case 14 and the spray tank 2.
A plurality of elastic rods, for example two elastic rods 52, are fixed to the shutter case 50 at their lower ends and extend vertically upward. It has appropriate rigidity in the direction and sufficient elasticity in the transverse direction.

The shutter cover 54 is fixed at both ends to the upper end of each elastic rod 52, covers the upper part of the shutter 28, and receives the spray material 26 in the spray material tank 24 on the upper surface side.

The material 26 above the shutter cover 54 is attached to the shutter 28.
Prevent it from falling directly onto the surface. A vibration sensor 56 is attached to the shutter cover 54 to detect the vibration speed of the shutter cover 54 in the horizontal direction, and the output of the vibration sensor 56 is sent to the display 46 via an electric wire 48.

FIG. 1 is a detailed structural diagram of the vibration sensor 56.

The inertial body 58 with a magnet is a cylindrical inertial part 60 with a large diameter.
and bar magnets 62 that protrude horizontally from both ends of the inertial part 60. The case 64 is fixed to the shutter cover 54, and the inertial part 60 of the magnetized inertial body 58 is fixed to the shutter cover 54.
is housed inside so that it can be guided horizontally.

The two compression coil springs 66 are compressed on the tip side of each bar magnet 62 and hold the magnetized inertial body 58 in a neutral position in the horizontal direction. The detection coils 68 are fixed to the inner periphery of the case 64 so as to surround each bar magnet 62 from the outside in the radial direction, and are connected to each other in series and to the electric wire 48 .

The operation of the embodiment will be explained.

The operator carries the power spreader 10 on his back and spreads the material 26 from the nozzles 42 of the vertical nozzle 38 and the multiple nozzle 40. At that time, the engine vibration.

The vibration is transmitted to the shutter case 50 and further transmitted to the shutter cover 54 via the elastic rod 52, causing the shutter cover 54 to relatively vibrate in the horizontal direction. On the other hand, the magnetized inertial body 58 of the vibration sensor 56 maintains its horizontal position due to inertial force, and as the compression coil spring 66 expands and contracts in the axial direction, the magnetized inertial body 58 of the vibration sensor 56 maintains its horizontal position. A relative vibration in the horizontal direction occurs. The shutter cover 54 is buried in the spray material 26 of the spray material tank 24 or is exposed from the spray material 26 when the remaining amount of the spray material 26 is small, and receives resistance from the surrounding material 26 while resisting engine vibrations. vibrates due to Spray tank 2
The more the remaining amount of material 26 in the shutter cover 54
receives a large resistance from the spray material 2G along with its vibration, so the relative vibration speed between the shutter cover 54 and the case 64 and the magnetized inertial body 58 is related to the remaining amount of the spray material 26 in the spray material tank 24. . The relative vibration of the magnetized inertial body 58 with respect to the case 64 and the detection coil 68 changes the magnetic flux density of the detection coil 68, and as a result, the detection coil 68 has the following effects: A voltage is generated that is related to the relative vibration velocity. This voltage is sent to the display 46 via wire 48,
In the display 46, the spray material 26 in the spray material tank 24 is displayed.
A value is displayed according to the remaining amount.

〔Effect of the invention〕

In the invention of claims 1 and 2, a vibration member is disposed at the lower part of the spray material tank, and the engine vibration is transmitted from the engine vibration transmission part through the first elastic support, and the vibration member is connected to the spray material in the spray material tank. is vibrated while receiving resistance related to the remaining amount of the spray material, thereby causing relative vibration at a speed related to the Pit of the spray material in the spray material tank between the vibrating member and the inertial body or the inertia body with a magnet. Therefore, it is possible to eliminate the need for arranging a large number of sensors in the vertical direction, and it is also possible to avoid complicating the detection section as in the case of directly detecting non-vibration displacement.

In the inventions of claims 1 and 2, the vibrating member vibrates in response to resistance corresponding to the remaining amount of the sprayed material from the sprayed material in the sprayed material tank, and the vibration member and the inertial body or the inertial body with a magnet vibrate. Since the relative vibration speed is detected, the weight of the fuel tank, etc. whose heavy electricity changes depending on the amount of fuel (11:, etc.) is excluded from the detected value, so the accurate remaining amount of spray material in the spray material tank can be displayed. be able to.

&Y In the invention of claim 3, the shutter cover is supported to the engine vibration transmission part such as the shutter case via the elastic support member 7, and the inertial body with the magnet is attached using the shutter cover, so the inertial body with the magnet is attached. There is no need to add a new vibration member for this purpose, and the structure and manufacturing can be done inside the cylinder.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a detailed structural diagram of a vibration sensor, Fig. 2 is a detailed structural diagram of the lower part of a spray tank, and Fig. 3 is a backpack power sprayer equipped with a remaining amount display device. This is an overall view of the machine. 1o...back power spreader, 24...spray tank,
26... Scattered matter, 28... Shutter, 46... Display device, 50... Shutter case (engine vibration transmission part), 52... Elastic rod (elastic support), 54... Shutter Cover (vibrating member), 58... Inertial body with magnet (
inertial body), 68...detection coil. 68: Detection coil

Claims (3)

[Claims] (1) Spray material tank (24) for storing spray material (26)
A vibrating member (54) is disposed at the lower part of the inside, and the vibrating member (54) is supported by the engine vibration transmission section (50) via an elastic support (52), and the inertial body (58) is connected to the vibrating member. (54), and from relative vibration between the vibrating member (54) and the inertial body (58) according to the remaining amount of the spray material (26) in the spray material tank (24). A method for detecting a remaining amount of a spray material (26) in a backpack power spreader, comprising detecting a remaining amount of a spray material (26) in the spray material tank (24). (2) A spray tank (24) that stores the spray material (26)
, a vibration member (54) disposed at the lower part of this spray tank (24) and supported by the engine vibration transmission section (50) via an elastic support (52), and this vibration member (54).
), the vibrating member (54) and the inertial body (58) with a magnet, which are displaceably disposed within the vibration member (54);
A backpack power spreader comprising: a detection coil (68) for detecting relative vibration with the main body; and a display (46) for displaying a value related to the output of the detection coil (68). Remaining amount detection device. (3) The shutter (28) is connected to the spray tank (24).
The vibrating member (54) is arranged at the lower part of the spray material tank (24) so as to be able to freely control the amount of the spray material (26) drawn out from the lower part of the shutter cover (54). 54) The method for detecting the remaining amount of a backpack power spreader according to claim 1.