JPS6171859A - Chemical agent sprinkler - Google Patents

Abstract

PURPOSE:To prevent the direct scattering of a chemical agent to crops, by providing two detectors for detecting the distance relation of a sprinkler and crops and altering a max. sprinkling distance corresponding to respective detection positions. CONSTITUTION:When the sprinkler 1 mounted to a machine body approaches crops such as a fruit tree up to a predetermined distance with the advance of the machine body, a first detector 4 is operated to allow the sprinkler 1 to sprinkle a chemical agent. The max. sprinkling distance of the chemical agent in this case is changed over to 'large' among variously settable distances and the chemical agent is sprinkled to the peripheries of the crops 3. When the sprinkler 1 further advances to reach just beside the crops, a second detector 5 is operated and the max. sprinkling distance is change over to 'small' to avoid the direct sprinkling of the chemical agent to the crops. When the sprinkler 1 is still present in the operation range of the first detector 4 even if shifted from the part just beside the crops, the max. sprinkling distance is again changed over to 'large' to succeed the sprinkling of the chemical agent and the sprinkling is stopped outside the detection range of the first detector 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to a chemical sprayer for spraying a chemical such as a herbicide near the root of a stationary object such as a fruit tree.

[Prior art]

It is undesirable to spray chemicals directly onto the trunks of fruit trees, and the only way to spray the roots is with a hand-held sprayer.

[Problem that the invention seeks to solve]

Due to the above reasons, the work efficiency is poor and it is inconvenient to carry out spraying work over a wide area. [Means to solve the problem] This invention provides a new chemical spraying machine that eliminates the above-mentioned drawbacks. Technical measures were taken.

In other words, in the case of a chemical sprayer that sprays chemicals around crops such as fruit trees (3) by running the entire spraying device (1) on the machine that is fully loaded (2) and around crops such as fruit trees (3), the maximum spraying distance of this spraying device (1) should be greatly reduced. The first pressure detection device (4) detects that the spraying device (1) is located within a predetermined distance from the crop (3), and the spraying device (1) (3) and a second detection device (5) that detects whether the spray device is located directly beside the spray device (3), and determines the maximum chemical spraying distance of the spray device (1) based on the operation of only the first detection device (4). The chemical dispersion machine is configured to switch the distance to a dog (a) and switch the distance to a short distance (b) based on the operation of the second detection device (5).

[Effect]

Spraying work is performed while moving the aircraft (2), but when the spraying device (1) mounted on the aircraft (2) approaches a crop (3) such as a fruit tree to a predetermined distance, the first detection device (4)
is activated. This operation causes the spraying device (1) to operate and spray the medicine. In this case, the maximum chemical spraying distance is set to a large value among those that can be set as large or small, and the chemical is sprayed around one crop (3).

Further, when the spraying device (1) reaches the horizontal force of the crop (3) and the spraying device (1) remains at its maximum spraying distance, the chemical is sprayed directly onto the first crop (3), killing weeds. If the spraying device (2) reaches the right side of the crop (3), the second detection device (5) will be activated and the maximum spraying distance will be reduced. to avoid direct spraying on crops.

If the spraying device (1) is removed from the right side of the crop (3) but is still within the operating range of the first detection device (4), the chemical spraying is continued by changing the maximum spraying distance to a large one again and proceeding further. When the device is out of the operating range of the first detection device (4), the spraying device (
The operation of 2) is stopped.

〔Example〕

An embodiment of this invention will be described based on the drawings.

(2) is a tractor body that is equipped entirely at the rear of the spraying device (1). The spraying device (1) consists of a chemical tank (6), a pump (7), etc., and the side of the pump (7) has a pulp (
8) (9) 'e via drug ejection nozzle α0 (11)
are provided in two rows.

The above-mentioned pulps (8) and (9) are provided in series, and among them, the pulp (8) communicates and blocks the passage by sliding the spool (8a), and the other pulp (9) communicates and blocks the passage by sliding the spool (9a). The branch passage leading to the passage of pulp (8) is selectively communicated or blocked by the passage of the pulp (8). The nozzle α0 (11) is connected to each end of this branch path. One nozzle α
The ejection port of the O nozzle is set upward, and the ejection port of the other nozzle α° C. is set downward. For this reason, the spool (9a
) The chemical ejection nozzle is determined by the sliding switch, and the maximum spraying distance is changed.

The first and second detection devices (4) are installed on the side of the drug tank (6).
) (5) All roles.

The first detection device (4) includes a contact rod (4a) protruding from a crop (3) such as a fruit tree and capable of swinging around a vertical axis, and a switch (4b) disposed at the base of the contact rod (4a). ) to “ON”
J rOFFJ. This contact rod (4a)
is resiliently supported in an inclined position with the tip side facing forward.

(4c) is a buffer spring. Furthermore, this switch (4b)
By turning “ON”, the spool of pulp (8) (
8a) A circuit is configured to excite the sliding solenoid (8b).

The second detection device @ (5) uses ultrasonic waves to confirm the presence or absence of the crop (3), and is directly connected to each of these nozzles 000D in order to transmit ultrasonic waves in the direction in which the medicine is ejected by the nozzles 000D. The transmitting element (5a) located at the top and the crop (
3) and a receiving element (5b) that receives reflected waves from the sea nozzle Cl0 (1°C, i.e. when the spraying device (2)
It can be confirmed that it rubs directly horizontally. The signals from each of the above transmitting and receiving elements are processed in the detection unit 7) (5c), and the pulp (9) spool (9a) sliding solenoid (9b)'! Configured to excite Th, and +
12 is a marker provided at the front end of the fuselage (2) and fixedly supported in an overhanging manner on one side, and α3αJ is a mounting pin that is to be fully connected to a support rod α4) that projects rearward from the fuselage (2).

The action of the upper side will be explained.

Fill the chemical tank (6) with, for example, a weeding chemical and drive the tractor body (2) in the orchard while driving the pump (7).
) to move forward.

When the contact rod (4a) of the first detection device (4) is in a non-contact state, the switch (4b) is rOFFJ, so the spool (8a) maintains the passage of the pulp (8) in the state of blocking the nozzle. Drug supply to αO to αD is cut off.

When the contact rod (4a) contacts the fruit tree, the switch (4a)
b) is turned "ON" and slides the spool (8a). Therefore, the passage is opened and the medicine is pumped to the pulp (9) section. There is a branch path in the pulp (9) and the spool (9a)
is alternatively passage f! : It is shut off and the solenoid (9b
) is in the demagnetized state, the passage on the nozzle aO side is opened, and the spraying operation is performed in the state (a) where the spraying distance is large.

When the contact rod (4a) maintains contact with the fruit tree and the aircraft (2) advances for a while, the ultrasonic wave from the transmitting element (5a) of the second detection device (5) hits the fruit tree and is reflected, and the ultrasonic wave is reflected by the receiving element (5b). ) is received. That is, it is detected that the spray nozzle αIQ1) portion of the spraying device (1) has reached the right side of the fruit tree. This excites the solenoid (9b), switches the branch path, and opens the nozzle αυ side passage.

The chemicals ejected from the nozzle αD are sprayed in a state where the spraying distance is small (medium) and cannot reach the fruit trees.

Even if the spraying device (1) passes directly beside the fruit trees.

While the contact rod (4a) of the first detection device (4) is in contact with the fruit tree, the medicine is ejected from the nozzle 00.

Further, when the contact rod (4a) comes out of contact with the fruit tree and returns to its original state, the switch (4b) turns rOFFJ and the ejection of the medicine from the nozzle α0 (11) is stopped.

〔Effect of the invention〕

According to this invention, only the first detection device is activated, that is, when the spraying device approaches an object within a predetermined distance, the spraying operation is started, but when the spraying device reaches the transverse force of the crop, the second detection device is activated. The detection device is activated to reduce the maximum spraying distance, prevent direct spraying onto the crop, and enable highly accurate spraying around the crop.

In this embodiment, a first detection device (4) and a second detection device (5) are used.
) The pulp is responsively controlled by the nozzle α0α
Alternatively, the medicine may be ejected from B. Furthermore, in changing the maximum spraying distance of the spraying device (2), it may be possible to spray the chemical on one side and stop spraying on the other.

Furthermore, there is a dual-purpose detection device (4) and (5) capable of detecting the distance between the spraying device (1) and the crop (3).
For example, the spraying distance may be changed by using an ultrasonic transmitter/receiver (ultrasonic transmitter/receiver type) and changing the entire ejection angle of the nozzle or changing the amount of medicine pumped depending on the detection distance.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a detection control circuit diagram, Fig. 2 is a side view of the main parts, Fig. 3 is a rear view thereof, and Fig. 4 is an overall plan view - Fig. 5 The figure is an explanatory diagram of the action. In the figure, (1) is the spraying device, (2) is the aircraft, (3) is the crop (fruit tree), (4) is the first detection device, (5) is the second detection device, (6) is the chemical tank, (7) is the pump - (8) (9
) indicates pulp -〇OαD indicates nozzle.

Claims (1)

[Claims] In a chemical sprayer that sprays chemicals around crops such as fruit trees by driving a machine equipped with a spraying device, the maximum spraying distance of this spraying device can be changed to a large or small one, and the spraying device is configured to allow the spraying device to travel within a predetermined distance from the crop. A first detection device that detects that the spraying device is located within a distance, and a second detection device that detects that the spraying device is located directly beside the crop are provided, and the spraying device detects that the spraying device is located directly beside the crop based on the operation of only the first detection device. A chemical spraying machine configured to increase the maximum chemical spraying distance of the device and to decrease the distance based on the operation of a second detection device.