JP2011152065A - Method for injecting liquid into plant and liquid injection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for injecting a liquid to a plant, which prevents clogging of contents of a plant in an injection hole when a plant is injected with an injection needle and improves certainty of an injection operation of a liquid into a plant and a liquid injection apparatus. <P>SOLUTION: In the liquid injection apparatus equipped with an injection needle for injecting a liquid into the inside of a plant, the injection needle 24 includes a receiving port 28 for receiving a liquid pressurized and supplied from a liquid supply source, an inside channel 29 for leading the liquid received by the receiving port to the direction of the tip of the injection needle and the injection hole 31 passing through the inside channel and the outer peripheral surface 30 of the injection needle. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a liquid injection method and a liquid injection device for injecting a liquid such as a herbicide into a plant.

  Conventionally, herbicides have been sprayed to remove plants to be weeded, such as weeds, but there are concerns about environmental pollution when sprayed with herbicides. It is known (see, for example, Patent Document 1).

JP-A-11-113474

However, in the above prior art, since the injection hole is provided at the tip of the injection needle (injection tube), when the injection needle is stabbed into the plant, the contents of the plant are clogged in the injection hole, and the plant comes from the injection hole. There was a problem that liquids such as herbicides could not be injected inside.
The present invention has been made in view of the above problems, and can prevent the contents of the plant from being clogged in the injection hole when the injection needle is inserted into the plant, thereby ensuring the liquid injection operation into the plant. Provided are a liquid injection method and a liquid injection device for a plant capable of improving the nature.

The liquid injection method for a plant according to the present invention is a liquid injection method for injecting a liquid into a plant via an internal flow path formed inside the injection needle by piercing the injection needle into the plant, and injecting into the injection needle An injection hole that penetrates the outer peripheral surface of the needle and the internal flow path is provided, and liquid is injected into the plant from the outer peripheral surface of the injection needle through the injection hole. Can be prevented from clogging the injection hole, and the reliability of the liquid injection operation into the plant can be improved.
A liquid injection device for a plant according to the present invention is a liquid injection device including an injection needle for injecting a liquid into a plant, and the injection needle receives a liquid supplied under pressure from a liquid supply source. Since it has a receiving port, an internal channel that guides the liquid received at the receiving port toward the tip of the injection needle, and an injection hole that penetrates the internal channel and the outer peripheral surface of the injection needle, the injection needle is attached to the plant. When stabbed, the contents of the plant can be prevented from clogging the injection hole, and the reliability of the liquid injection operation into the plant can be improved.
The injection needle includes a shaft portion having a constant diameter and a tip portion that is provided at one end of the shaft portion and is sharply formed to pierce the plant, and the receiving port, the internal channel, and the injection hole are the shaft portion. Therefore, when the injection needle is pierced into the stem of the plant, the content of the plant moves on the outer peripheral surface of the shaft portion, so that the content of the plant becomes difficult to enter the injection hole. Therefore, the certainty of the liquid injection | pouring operation | work into a plant improves more.
Since it has a liquid supply path connecting the liquid supply source and the receiving port, an opening / closing device having an opening / closing body for opening / closing the liquid supply path, and an operation lever for operating opening / closing of the liquid supply path by the opening / closing body, By operating the operation lever, the liquid injection operation and the injection stop operation into the plant can be easily performed.
An attracting member that attracts the plant to the tip of the injection needle is provided, and the attracting member and the operation lever are coupled so as to interlock with each other, and the operation lever operates to bring the attraction member closer to the tip of the injection needle. Since the opening / closing body is operated so as to open the liquid supply path, by operating the operation lever, the plant can be brought close to the tip of the injection needle with the attracting member, and the injection needle can be inserted into the plant and the liquid can be supplied from the injection hole. Since the liquid can be injected into the plant by spraying, the liquid injection operation into the plant can be easily performed.
Since the attracting member is provided symmetrically about the central axis of the injection needle, the left and right attracting members are operated by operating the operation lever after the plant stem is positioned between the left and right attracting members. The plant stem can be brought close to the tip of the injection needle from the left and right. That is, since the certainty of the operation of bringing the plant stem close to the tip of the injection needle is increased, the liquid injection operation can be performed efficiently.
Since the guide that guides the plant attracted to the tip of the injection needle by the drawing member to the tip of the injection needle is provided, the reliability of the operation of bringing the plant stem close to the tip of the injection needle is further improved, and the injection work is performed. It will be more efficient.
The pulling member gives the plant the force to bend the plant by pressing the plant against the guide, so that liquid can be injected into the bent part of the stem, and the reliability of the liquid injection operation into the plant is increased. By bending the stem of the plant, the bodily fluid of the plant leaches out from the bent part of the stem, and the plant fluid and liquid mix and move to the root of the plant, so the effect of the liquid injected into the plant Will appear sooner. Also, after the liquid injection into the plant, the bent shape of the plant stem remains, so it can be easily determined whether the liquid has been injected by checking whether the plant stem is bent or not. Efficiency.

(A) is a perspective view of the liquid supply device, (b) is a cross-sectional view of the injection needle (= a cross-section along the central axis of the injection needle) (Embodiment 1), (c) is a cross-sectional view of the injection needle (Embodiment) 7). Sectional drawing of a liquid supply apparatus (Embodiment 1). FIG. 3 is an exploded perspective view of the attracting portion (first embodiment). (A) is a disassembled perspective view of an injection part and a guide, (b) is a perspective view (Embodiment 1) which shows the front-end | tip part of the liquid supply apparatus with which the injection part; The figure which looked at the liquid supply apparatus from the front end side (embodiment 1). The top view which shows the front-end | tip part of a liquid supply apparatus (Embodiment 1). Sectional drawing which shows operation | movement of a herbicide pressurization apparatus (embodiment 1). Sectional drawing which shows operation | movement of a switchgear (Embodiment 1). Operation | movement explanatory drawing of an operation lever (Embodiment 1). FIG. 6 is a plan view showing the operation of the liquid supply device (Embodiment 1). Sectional drawing which shows operation | movement of a liquid supply apparatus (Embodiment 1). Sectional drawing which shows operation | movement of a switchgear (embodiment 2). Sectional drawing of a liquid supply apparatus (Embodiment 3). The top view which shows the front-end | tip part of a liquid supply apparatus (Embodiment 4). FIG. 9 is a plan view showing a tip portion of a liquid supply apparatus (Embodiment 5). The top view which shows the front-end | tip part of a liquid supply apparatus (Embodiment 6).

Embodiment 1. FIG.
As shown in FIG. 1, a herbicidal apparatus 1 according to Embodiment 1 includes a herbicide pressurizing apparatus 2 as a liquid supply source and a liquid pressurizing apparatus, a herbicide injecting apparatus 3 as a liquid supply apparatus to a plant, and a weeding A pressurizing device side supply path 4 for supplying the herbicide as a liquid from the herbicide pressurizing device 2 to the herbicide injecting device 3 is provided. Although the formation material of the herbicide injection apparatus 3 is not specifically limited, For example, it forms with a synthetic resin, a metal, etc.

The herbicide pressurizing device 2 is formed by a pressure sprayer.
The herbicide injection device 3 includes an exterior body 5, an opening / closing device 6 that opens and closes the herbicide supply path, an injection device side supply path 7, an injection unit 8, a drawing unit 9, a guide 10, and an operation lever 11. With.

The exterior body 5 includes a base body 12 and an extension body 13.
One end side of the base body 12 is formed in a grip (handshake) portion 14, and an extension body 13 is attached to the other end. The base body 12 has, for example, an inner space 15 covered on three sides.
An operation lever 11 is attached to an intermediate portion of the base 12. The operation lever 11 has a configuration like a trigger of a gun attached to the base 12 so as to be rotatable in a direction A approaching the grip portion 14 and a direction B away from the grip portion 14 via the rotation center shaft 16. Yes, it can be operated with one hand.
The extension body 13 is formed of a cylindrical body (for example, a cylinder) that extends linearly from the other end (tip) of the base body 12 like a barrel of a gun.
The operation lever 11 and the base 12 are made of, for example, a synthetic resin.

The opening / closing device 6 is fixed to the grip portion 14 while being housed in the inner space 15 of the grip portion 14. The opening / closing device 6 includes an opening / closing supply passage 17 that allows the pressurization device side supply passage 4 and the injection device side supply passage 7 to communicate with each other, and an opening / closing body 18 that opens and closes the opening / closing supply passage 17.
As shown in FIG. 8A, when the opening / closing body 18 is not pressed by the operating lever 11, the opening / closing port 17b of the opening / closing supply path 17 is closed by the spring force of the return spring 17a. As shown in FIG. 8B, when the operation lever 11 is pressed, the opening / closing port 17b of the opening / closing supply path 17 is opened against the spring force of the return spring 17a.

The pressurization apparatus side supply path 4 and the injection apparatus side supply path 7 are formed by, for example, a cylindrical flexible tube. Then, one end opening of the pressurizer side supply path 4 and the herbicide outlet 19 of the herbicide pressurizer 2 are connected so as to be able to communicate, and the other end opening of the pressurizer side supply path 4 and the weeding of the open / close supply path 17 are connected. The medicine receiving port 20 is connected to be able to communicate, and one end opening of the injection apparatus side supply path 7 and the herbicide outlet 21 of the opening / closing supply path 17 are connected to be able to communicate with each other, and the other end opening of the injection apparatus side supply path 7 is connected. A receiving port 28 of an injection needle 24 to be described later is connected to be able to communicate.
That is, in order to supply the pressurized herbicide from the herbicide pressurizing device 2 to the injection unit 8 of the liquid injecting device 3 by the pressurizing device side supply path 4, the open / close supply path 17 and the injection apparatus side supply path 7. The liquid supply path 23 is formed, and the liquid supply path 23 is opened and closed by the opening / closing body 18.

The injection unit 8 is provided at the other end (tip) 32 of the extension body 13.
The injection unit 8 includes an injection needle 24 and an injection needle fixing unit 25.
The injection needle 24 includes a shaft portion 26 having a constant diameter and a tip portion 27 provided at one end of the shaft portion 26 and formed sharply to pierce a plant. The shaft portion 26 includes a receiving port 28 that receives the liquid supplied from the herbicide pressurizing device 2, an internal channel 29 that guides the herbicide received at the receiving port 28 toward the distal end of the injection needle 24, and the internal channel. 29 and an injection hole 31 penetrating the outer peripheral surface 30 of the shaft portion 26.
The number of injection holes 31 is one or more. The diameter of the injection hole 31 is, for example, about 0.3 mm. The injection hole 31 is formed so that the central axis of the injection hole 31 is orthogonal to the central axis of the shaft portion 26.
The distal end 27 of the injection needle 24 has, for example, a configuration in which one end of the shaft is formed in a conical surface shape such as a conical surface and the tip is sharpened, or one end of the shaft is cut obliquely to sharpen the tip. Formed by configuration.

The injection needle 24 is installed so that the central axis of the shaft portion 26 and the central axis of the cylinder of the extension body 13 coincide. Thus, the injection needle 24 can be easily pierced into the plant stem P by crossing the extension direction of the tube of the extension body 13 and the extension direction of the plant stem P and pressing the tip of the extension body 13 against the plant. Will be able to.
The injection needle 24 includes a shaft portion 26 having a constant diameter, penetrates through the internal flow path 29 of the shaft portion 26 and the outer peripheral surface 30 of the shaft portion 26, and the central axis is orthogonal to the central axis of the shaft portion 26. Since the injection hole 31 is provided, the advancing direction of the injection needle 24 in the plant of the injection needle 24 in the direction along the central axis of the shaft portion 26 and the central axis of the injection hole 31 are always orthogonal to each other. For this reason, when the injection needle 24 is stabbed into the plant stem P, the contents of the plant move on the outer peripheral surface 30 of the shaft portion 26, so that the contents of the plant are difficult to enter the injection hole 31. It will not clog. Therefore, the herbicide can be reliably injected into the plant through the injection hole 31.
In addition, in the case of a plant with a thin stem P, if there is an injection hole at the tip of the injection needle as in the prior art, there is a problem that the tip of the injection needle penetrates the stem P and the herbicide cannot be injected into the plant. In the first embodiment, even if the tip of the injection needle 24 penetrates the stem P, there is a high possibility that the injection hole 31 stays in the plant. The herbicide can be efficiently injected into the inside.

The drawing portion 9 is provided at the other end 32 of the extension body 13. The drawing portion 9 includes a drawing member 33 that draws plants to the tip of the injection needle 24 and a support member 34 that is attached to the other end 32 of the extension body 13 and rotatably supports the drawing member 33.
The pulling member 33 and the operation lever 11 are connected by the tension body 35 so that the pulling member 33 and the operation lever 11 are interlocked.

  Accordingly, when the operator operates the operation lever 11 to rotate in the direction A approaching the grip portion 14, the attracting member 33 is moved closer to the tip of the injection needle 24 by the tension body 35 pulled by the operation lever 11. While operating so as to rotate, the operation lever 11 presses the opening / closing body 18 so that the opening / closing body 18 opens the opening / closing supply path 17.

As shown in FIG. 3, the support member 34 of the attracting portion 9 is configured by a plate material (plate) formed in a Y shape in plan view. The support member 34 is inserted into the cylinder of the extension body 13 through the opening 39 of the other end 32 of the extension body 13 and is fixed to the other end portion of the extension body 13. And a member mounting portion 41 corresponding to a Y-shaped upper bifurcated portion protruding from the other end 32 of the extension body 13. That is, the support member 34 is divided into two left and right extending at the upper part of the Y shape of the member mounting portion 41 when the fixing portion 40 corresponding to the lower portion of the Y shape is fixed to the other end portion of the extension body 13. The wing portions 42; 42 extend forward to the left and right around the central axis a of the extension body 13 (see FIG. 4A).
The fixing structure of the fixing part 40 and the other end 32 of the extension body 13 is passed through the other end 32 of the extension body 13 and the bolt through holes 43; 44 formed in the fixing part 40, and these bolt through holes 43; 44. And a nut 46a fastened to the tip of the bolt 45 passed through the bolt through holes 43; 44 (see FIG. 3).
When the side on which the operation lever 11 is provided in the herbicide injection device 3 is the lower side, two support members 34 are provided symmetrically about the central axis a of the extension 13.
The attracting members 33; 33 are rotatably attached to the distal end sides of the left and right wing portions 42; 42 of the pair of upper and lower support members 34; 34, respectively.

As shown in FIG. 3, the attracting member 33 includes a rotating body 46 and an arm 47.
The rotating body 46 is formed in a cylindrical shape, for example, and is provided so that the rotation support shafts 48 protrude from the centers of the circles on both end faces of the cylinder. The arm 47 is provided in two upper and lower stages so as to protrude from the circumferential surface of the rotating body 46. The arm 47 includes a linear contact portion 49 that contacts the plant stem P and draws the stem P toward the distal end side of the injection needle 24.
Rotation support shafts 48 projecting from both end surfaces of the rotating body 46 of the attracting member 33 are mounted in bearing holes 50 formed at the distal ends of the left and right wing portions 42; 42 of the pair of upper and lower support members 34; Thus, the pair of left and right attracting members 33; 33 are rotatably attached to the support member 34.

The tension body 35 includes a distal-end bifurcated extension wire portion 51, an operation lever-side wire portion 52, and a connecting portion 53 that connects one end of the distal-end-side bifurcated extension wire portion 51 and the other end of the operation lever-side wire portion 52. Composed. The left and right end portions 54; 54 of the distal-end bifurcated extension wire portion 51 are connected to the rotating bodies 46; 46 of the left and right attracting members 33; 33, respectively. For example, the rotator 46 is formed with a through hole 55 that penetrates the circumferential surface of the rotator 46 that is 180 degrees away from each other so as to cross the center of the rotator 46. A screw hole 56 penetrating the hole 55 and the circumferential surface of the rotating body 46 is formed.
The left and right end portions 54; 54 of the distal-end bifurcated extension wire portion 51 are respectively passed through the through holes 55; 55 of the left and right rotating bodies 46; 46, and the wire portions passed through the through holes 55 are screw holes 56. The left and right end portions 54; 54 of the front end side bifurcated extension wire portion 51 are fixed to the rotating bodies 46; The left and right end portions 54; 54 of the distal-end bifurcated extension wire portion 51 are wound around the circumferential surface of the rotating body 46 after being fixed with a set screw 58 in the through hole 55. And while the intermediate part of the front end side bifurcated extension wire part 51 is connected to the connection part 53, the other end part of the operation lever side wire part 52 is connected to the connection part 53, and as shown in FIG. One end of 52 is connected to the wire connecting portion 11 a of the operation lever 11.

  The connecting portion 53 is, for example, the other stop hole formed in the intermediate portion between the one hole 60 communicating with the one stop hole portion 59 formed in the other end portion of the operation lever side wire portion 52 and the tip side bifurcated extension wire portion 51. A two-hole washer 63; 63 provided with the other hole 62 communicating with the portion 61, one bolt 64 inserted into the one hole 60 and one retaining hole 59 of the two-hole washer 63, and the tip of the one bolt 64 And the other bolt 66 inserted into the other hole 62 of the two-hole washer 63 and the other retaining hole 61, and the other nut 67 fastened to the tip of the other bolt 66. The

  The pair of upper and lower support members 34; 34 is passed through a bolt through hole 71 provided in an intermediate portion 70 located between the left wing portion 42 and the right wing portion 42, and an upper and lower bolt through hole 71; 71. The connecting bolt 69 is connected by a connecting portion 73A including a nut 72 fastened to the tip of the connecting bolt 69 passed through the upper and lower bolt through holes 71;

  Reference numeral 36 denotes a return spring. A locking annular portion 68 formed at one end of the return spring 36 is locked by a connecting bolt 69 that connects the pair of upper and lower support members 34; 34, and is connected to the other end of the return spring 36. The formed locking annular portion 74 is locked to the wire portion wound around the rotating body 46, whereby the tension body 35 and the rotating body 46 are connected to the support member 34 by the return spring 36. That is, the locking annular portion 74 of the return spring 36 is inserted between the wire portion wound around the rotating body 46 and the outer peripheral surface of the rotating body 46 and locked to the wire portion. The

The support member 34 and the attracting member 33 are provided with engaging portions 37; 38 that are engaged with each other. The engaging portions 37; 38 are engaged with each other, so that the attracting member 33 stops at the initial position. It is configured as follows.
The locking portion 37 provided on the support member 34 is formed by, for example, a bolt shaft that penetrates the member mounting portion 41 and protrudes toward the circumferential surface of the rotating body 46. The locking portion 38 provided on the attracting member 33 is formed by a locking piece provided so as to protrude from the circumferential surface of the rotating body 46, for example.

  As shown in FIG. 4A, the injection needle fixing portion 25 and the guide 10 of the injection portion 8 are fixed to the intermediate portion 70 located between the left wing portion 42 and the right wing portion 42 in the support member 34. Is done. Each of the intermediate portion 70, the injection needle fixing portion 25 and the guide 10 formed in a boomerang shape is formed with bolt through holes 74;

  The upper guide 10 is disposed above the intermediate portion 70 of the upper support member 34, and the lower guide 10 is disposed below the intermediate portion 70 of the lower support member 34. An upper cylinder 77 for separating the guide 10 and the intermediate portion 70 is provided between the bolt passage hole 76 of the upper guide 10 and the bolt passage hole 74 of the upper intermediate portion 70. A lower cylinder 78 is provided between the bolt through hole 76 and the bolt through hole 74 of the lower intermediate portion 70 to isolate the guide 10 and the intermediate portion 70 from each other.

  The injection needle fixing portion 25 is disposed between the upper intermediate portion 70 and the lower intermediate portion 70. An upper cylinder 79 is provided between the upper opening of the bolt through hole 75 of the injection needle fixing portion 25 and the upper intermediate portion 70 to isolate the injection needle fixing portion 25 and the intermediate portion 70 from each other. A lower cylinder 80 is provided between the lower opening of the bolt through hole 75 of the portion 25 and the lower intermediate portion 70 to isolate the injection needle fixing portion 25 and the intermediate portion 70.

  In the above configuration, the fixing bolt 73 includes the bolt passage hole 76 of the upper guide 10, the cylinder hole of the upper cylinder 77, the bolt passage hole 74 of the upper intermediate section 70, the cylinder hole of the upper cylinder 79, and the injection needle fixing. These holes are passed through the bolt holes 75 of the portion 25, the cylinder holes of the lower cylinder 80, the bolt holes 74 of the lower intermediate section 70, the cylinder holes of the lower cylinder 78, and the bolt holes 76 of the lower guide 10. When the nut 81 is fastened to the tip of the fixing bolt 73 passed through the injection bolt 8, the injection needle fixing portion 25 and the guide 10 of the injection portion 8 are fixed to the intermediate portion 70 of the support member 34.

  As shown in FIG. 4B, the guide 10 includes left and right wing portions 82; 82 that extend forward in the left and right directions about the central axis a of the extension body 13 in a state of being fixed to the intermediate portion 70. It becomes composition. The angle formed by the front inclined straight portions 83; 83 of the left and right wing portions 82; 82 is smaller than the angle formed by the front inclined straight portions 83; 83 of the left and right wing portions 42;

The injection needle fixing portion 25 includes a through hole 87 that penetrates the front end surface 85 and the rear end surface 86 in a state where the injection needle fixing portion 25 is fixed to the intermediate portion 70. In a state of being fixed to the intermediate portion 70, the center axis of the through hole 87 and the center axis a (see FIG. 3) of the extension body 13 coincide.
The injection needle 24 is fixed to the injection needle fixing portion 25 via the connecting member 88. The connecting member 88 is formed of a columnar body having a communication path communicating with the internal flow path 29 of the injection needle 24 inside, and is integrated with the rear end portion of the injection needle 24. The connecting member 88 is fitted into the through hole 87 from the front end face 85 side of the injection needle fixing portion 25 and fixed with a set screw or the like (not shown), whereby the injection needle 24 is fixed to the injection needle fixing portion 25. Thus, the injection needle 24 is fixed to the intermediate portion 70 of the support member 34 so that the central axis of the injection needle 24 and the central axis a of the extension 13 coincide with each other and the injection hole 31 is positioned on the lower side. (See FIG. 5).
Thus, since the injection needle 24 is fixed so that the opening 31t (see FIG. 1B) of the injection hole 31 serving as the injection port faces downward, the injection needle is grasped by the grip portion 14 and the operation lever 11. When 24 is inserted into a plant, the opening 31t of the injection hole 31 faces downward, so that when the injection needle 24 is inserted into the plant stem P, the contents of the plant are difficult to enter through the injection hole 31, and the injection hole 31 is prevented from being clogged. As the effect increases, the herbicidal agent can be sprayed toward the root of the plant, so the herbicidal effect is enhanced.

  Further, the other end opening of the injection device side supply path 7 is fixed to the injection needle fixing portion 25 via the connecting member 89 (see FIG. 3). The connecting member 89 is formed of a columnar body having a communication path communicating with the through hole 87 inside. The other end opening of the injection device side supply path 7 is connected so as to communicate with one end of the communication path of the connection member 89, and the other end side of the communication path of the connection member 89 penetrates from the rear end face 86 side of the injection needle fixing portion 25. By fitting in the hole 87 and fixing the connecting member 89 with a set screw or the like (not shown), the other end opening of the injection device side supply path 7 and the receiving port 28 of the injection needle 24 are connected to the injection needle fixing portion 25. The herbicide under pressure is connected via the through hole 87 so that the pressurized herbicide is injected through the liquid supply path 23, the through hole 87 of the injection needle fixing portion 25, and the internal flow path 29 of the injection needle 24. Injection is possible from the opening 31t of the hole 31.

The injection needle 24 is installed such that the tip protrudes forward from the boundary portion between the front inclined straight line portions 83; 83 of the left and right wing portions 82; 82 of the guide 10.
Since the injection needle 24 is thus installed, as shown in FIGS. 10 and 11, the plant stem P is inserted between the left arm 47 and the right arm 47, and the operator grips the operation lever 11. When the arm 47 of the attracting member 33 is rotated in the direction approaching the distal end of the injection needle 24 by operating to rotate in the direction A approaching the portion 14, the plant attracted to the distal end side of the injection needle 24 by the arm 47 The stem P is guided by the front inclined linear portion 83 of the wing portion 82 of the guide 10 and moves toward the distal end side of the injection needle 24, while the linear contact portion 49 of the arm 47 and the front inclined linear portion of the wing portion 82 of the guide 10. 83, the needle 24 is bent and the injection needle 24 is inserted into the bent portion.
Therefore, since the plant stem P is bent and the herbicide can be injected into the bent portion of the stem P through the injection hole 31, the herbicide can be reliably injected into the plant.
When the stem P of the plant is bent, the bodily fluid of the plant is leached from the bent portion of the stem P, and the bodily fluid of the plant and the herbicide are mixed and moved to the root of the plant. Since the effect of can be quickly observed, the plant can be effectively withered and the herbicidal effect can be improved.
Further, since the bent shape of the plant stem P remains after the injection of the herbicide into the inside of the plant, it can be easily determined whether or not the herbicide has been injected by checking whether or not the plant stem P is bent. As a result, work efficiency can be improved.

  As described above, the support member 34 attached to the distal end of the extension 13 and the injection unit 8 fixed to the support member 34; the attracting member 33; the guide 10; the return spring 36, etc. The tip is configured. The tip of the herbicide injection device 3 and the extension 13 are made of, for example, metal.

  As shown in FIG. 9, the operation lever 11 is provided with a rotatable stopper 90, and the base 12 is provided with a locking portion 91 for locking the stopper. That is, the operating lever 11 is operated to rotate in the direction A approaching the grip portion 14, and the operating lever 11 presses the opening / closing body 18 to open the opening / closing port 17b of the opening / closing supply path 17 (FIG. 8B). )), The operation state can be maintained by locking the stopper 90 to the locking portion 91, so that it is not necessary to continue to hold the operation lever 11 when performing the injection work for a long time. Work burden is reduced. Further, by locking the stopper 90 to the locking portion 91, as shown in FIG. 10C, the attracting member 33; 33 is close to the injection needle 24, that is, the attracting member 33; 33 is Since it is maintained in the closed state, the total length is shortened to facilitate storage, and it is possible to prevent the hand from touching the tip of the attracting members 33; 33 and the injection needle 24.

As shown in FIG. 7, the herbicide pressurizing device 2 includes a container 100 and a pressurizing means 110.
The container 100 is formed in an upper open type having an internal space 101 for storing a herbicide supplied to a plant.
The pressurizing means 110 is used to pressurize the internal space 101 in the container 100 and supply the herbicide from the container 100 to the pressurization apparatus side supply path 4. Unit 103.
The air pressure unit 103 in the container slides in the air storage chamber 104 formed in a cylindrical shape, and an air pressing unit 105 and a check valve that send the air in the air storage chamber 104 to the internal space 101 of the container 100. 106. As shown in FIG. 7A, the check valve 106 has an air inlet 108 formed in the lower portion of the air accommodating chamber 104 by the spring force of the spring 107 when the air pressing portion 105 is not pressed. As shown in FIG. 7B, when the air pressing portion 105 is pressed, the air inlet 108 is opened against the spring force of the spring 107, as shown in FIG. 7B.
Since air is sent from the air inlet 108 to the internal space 101 of the container 100 to pressurize the internal space 101 of the container 100, the through-hole 103 a of the lid 102 that penetrates the inside and outside of the container 100, the container-side hose 111, The herbicide is supplied to the pressurizer side supply path 4 via. The through hole 103a functions as a herbicide communication passage, and the opening on the outer surface side of the through hole 103a functions as a herbicide outlet 19. One end opening of the pressure device side supply path 4 and the herbicide outlet 19 of the through-hole 103a are connected to each other via a connector (not shown). One end of the container-side hose 111 is installed at the bottom of the internal space 101 of the container 100, and the other end is installed inside the through hole 103a.

  Reference numeral 200 denotes an arm support mechanism that supports the arm in a state where the grip portion 14 of the herbicide injection device 3 is gripped. The arm support mechanism 200 includes a connecting portion 201 that is fixed to the grip portion 14 and protrudes rearward from the grip portion 14, an arm support portion 202, and a hinge 203. The arm support portion 202 is rotatably supported by the connecting portion 201 by a hinge 203 attached to the connecting portion 201.

  When the operator uses the herbicide injection device 3 in the upright state of the arm support mechanism 200 in which the arm support unit 202 is rotated, the herbicide injection device 3 is used at two points of the arm support unit 202 and the grip unit 14. Supported. Thereby, since the load of the herbicide injection apparatus 3 which an operator bears in the grip part 14 can be reduced, the operator can make the operation of the herbicide injection apparatus 3 easy.

  As the herbicide, an agent that kills plants or suppresses germination of plant seeds, agricultural chemicals, and the like are used. For example, the product name “Round Up Max Road” (registered trademark) manufactured by Nissan Chemical Industries, Ltd., the product name “Turnout” (registered trademark) manufactured by Sumika Takeda Horticultural Co., Ltd., and the like are used.

  As a plant to be weeded, for example, a plant in which a dike slope of a river is barely covered. For example, it is a group of perennial plants such as Japanese knotweed, bracken, Japanese cypress, and sorrel, exotic plants such as black-spotted woodpecker and pine primrose, vines such as kuzu, canamgrass and kusafuji, and woody plants such as false acacia and willows.

According to the herbicide injection device 3 of the first embodiment, in a state where the operator does not operate the operation lever 11, the arm 47 moves away from the injection needle 24 by the spring force of the return spring 36 on the rotating body 46. And the linear contact portions 49 of the left and right arms 47 extend substantially in parallel along the central axis a of the extension body 13 by the locking of the locking portions 37 and 38. It is located at such an initial position. That is, the attracting member 33 is pulled back to the initial position away from the tip of the injection needle 24 by the spring force of the return spring 36.
When the operator operates the operation lever 11 to rotate in the direction A approaching the grip portion 14, the tension body 35 is pulled toward the grip portion 14, the return spring 36 extends, and the rotation body 46 becomes the tension body 35. By being pulled and rotated in one direction, the arm 47 rotates in a direction approaching the tip of the injection needle 24 from the initial position, and the linear contact portions 49 of the left and right arms 47 intersect vertically, The linear contact portion 49 is in a state substantially orthogonal to the central axis a of the extension body 13 (see FIG. 6). That is, the right arm 47; 47 is provided in a relationship like an inner blade and an outer blade of scissors (鋏). Moreover, when the operator operates the operating lever 11 to rotate in the direction A approaching the grip portion 14 and the opening / closing body 18 is pressed by the operating lever 11, the opening / closing port 17b of the opening / closing supply path 17 is opened. The herbicide pressurized by the herbicide pressurizing device 2 is supplied to the injection needle 24 and injected from the injection hole 31.
Therefore, if the operator operates the operation lever 11 to rotate in the direction A approaching the grip portion 14 with the plant stem P positioned between the left and right arms 47; 47, the plant stem P is moved to the arm 47. Then, the injection needle 24 is pulled toward the distal end side of the injection needle 24 and bent between the linear contact portion 49 of the arm 47 and the front inclined linear portion 83 of the wing portion 82 of the guide 10, and the injection needle 24 is bent at the bent portion. Since it is pierced, the injection hole 31 is easily located in the plant, and the herbicide is injected from the injection hole 31 in a state where the injection hole 31 is located in the plant, so that the herbicide can be reliably injected into the plant. It becomes like this.
Further, when the operator releases the operation lever 11 from the state in which the operation lever 11 is gripped, the tension body 35 is pulled by the spring force of the return spring 36, and accordingly, the rotating body 46 is also one side. It rotates in the direction opposite to the direction, and the attracting member 33 is pulled back to the initial position away from the tip of the injection needle 24.

That is, the herbicide pressurizing device 2, the liquid supply path 23, the ejection unit 8, the opening / closing body 18, and the operation lever 11 constitute a liquid ejection mechanism.
Further, the pulling portion 9, the tension body 35, the return spring 36, the locking portions 37; 38 and the operation lever 11 constitute a pulling operation mechanism.

According to the herbicide injecting device 3 of the first embodiment, the receiving port 28 that receives the liquid pressurized and supplied from the herbicide pressurizing device 2 and the liquid received by the receiving port 28 in the distal direction of the injection needle 24. Since the internal flow path 29 to be guided and the injection hole 31 penetrating the internal flow path 29 and the outer peripheral surface 30 of the injection needle 24 are provided, the contents of the plant are injected into the injection hole 31 when the injection needle 24 is stabbed into a plant. Can be prevented, and the reliability of the herbicide injection into the plant can be improved.
According to the herbicide injection device 3 of the first embodiment, the shaft portion 26 having a constant diameter and the tip portion 27 provided at one end of the shaft portion 26 and sharply formed to pierce the plant are provided. Since the mouth 28, the internal channel 29, and the injection hole 31 are provided with the injection needle 24 formed in the shaft portion 26, when the injection needle 24 is pierced into the plant stem P, the contents of the plant are Since it moves on the outer peripheral surface 30, it becomes difficult for the contents of the plant to enter the injection hole 31. Therefore, when the injection needle 24 is stabbed into a plant, it becomes possible to more reliably prevent the plant contents from being clogged in the injection hole 31 and further improve the reliability of the herbicide injection work into the plant. it can.
According to the herbicide injection device 3 of the first embodiment, the liquid supply path 23 connecting the herbicide pressurization apparatus 2 and the receiving port 28, and the opening / closing apparatus 6 having the opening / closing body 18 that opens and closes the liquid supply path 23, Since the operation lever 11 for operating the opening and closing body 18 to open and close the liquid supply path 23 is provided, the operation of the operation lever 11 makes it possible to easily perform the herbicide injection operation and the injection stop operation.
According to the herbicide injecting apparatus 3 of the first embodiment, the attracting member 33 that attracts the plant to the tip of the injecting needle 24 is provided, and the attracting member 33 and the operation lever 11 are connected to each other by the tension body 35. The operation lever 11 operates the pulling member 33 so as to be close to the tip of the injection needle 24 and also operates the opening / closing body 18 so as to open the liquid supply path 23. Therefore, by operating the operation lever 11, the operation lever 11 is operated. By bringing the plant close to the tip of the injection needle 24 with the shifting member 33, the injection needle 24 can be inserted into the plant, and the herbicide can be injected into the plant by spraying the herbicide from the injection hole 31.
According to the herbicide injection device 3 of the first embodiment, the attracting member 33 is provided symmetrically about the central axis of the injection needle 24, so that the plant stem P is placed between the left and right attracting members 33. By operating the operation lever 11 after being positioned, the plant stem P can be brought close to the tip of the injection needle 24 from the left and right by the left and right attracting members 33, so that the plant stem P is brought close to the tip of the injection needle 24. Since the certainty of the approaching operation increases, the injection work can be performed efficiently.
According to the herbicide injection device 3 of the first embodiment, since the guide 10 that guides the plant attracted to the distal end side of the injection needle 24 by the attracting member 33 to the distal end of the injection needle 24 is provided, the plant stem P is provided. Since the reliability of the operation of approaching the tip of the injection needle 24 is further improved, the injection operation can be performed more efficiently.
According to the herbicide injection device 3 of the first embodiment, the attracting member 33 applies a force to bend the plant to the plant by pressing the plant against the guide 10, so that the injection hole 31 is formed in the bent portion of the stem P. Herbicide can be injected through the plant, and the herbicide can be reliably injected into the inside of the plant. Also, by bending the plant stem P, the bodily fluid of the plant exudes from the bent portion of the stem P, and the plant bodily fluid and the herbicide mix and move to the root of the plant. The effect of the herbicide appears quickly. Therefore, a plant can be withered effectively and the herbicidal effect can be improved. Moreover, since the bent shape of the plant stem P remains after the injection of the herbicide into the inside of the plant, it can be easily determined whether the herbicide has been injected by checking whether the plant stem P is bent. , Work efficiency can be improved.
According to the herbicide injection device 3 of the first embodiment, since the operation lever 11 that can be operated with one hand is provided, the operation can be performed with one hand, and the other hand is freed. With one hand, it becomes possible to scrape off plants that are in the way of work, and for example, work on a levee slope can be performed safely.
According to the herbicide injection device 3 of the first embodiment, the base 12 is provided with the grip portion 14 and the operation lever 11 is attached, and the extension 13 is extended forward from the tip of the base 12. Since the tip of the herbicide injection device 3 is provided, the herbicide can be sprayed at a place away from the hand operating the operation lever 11, and the operation can be performed safely.

That is, the herbicide injection device 3 as the liquid supply device of the first embodiment is fixed to the exterior body 5 and one end side of the exterior body 5 via the support member 34 and is pressurized and supplied from the liquid supply source. Receiving port 28 for receiving the liquid to be injected, an internal channel 29 for guiding the liquid received at the receiving port 28 toward the distal end of the injection needle 24, and an injection penetrating through the internal channel 29 and the outer peripheral surface 30 of the injection needle 24 The injection needle 24 provided with the hole 31 and the herbicide pressurizing apparatus 2 as a liquid supply source and the injection needle 24 are connected so as to communicate with each other, and the herbicide pressurized from the herbicide pressurizing apparatus 2 is injected into the injection needle 24. A liquid supply path 23 for supplying liquid to the liquid supply path, an opening / closing body 18 provided in the middle of the liquid supply path 23 to open and close the liquid supply path 23, and one end (tip 32) side of the exterior body 5. An attracting member 33 for attracting the plant to the tip of the injection needle 24, and an exterior An operation lever 11 rotatably provided on the other end side of 5, and a pulling body 35 that connects the pulling member 33 and the operation lever 11 so that the pulling member 33 and the operation lever 11 are interlocked, By operating the operating lever 11, the attracting member 33 moves so as to approach the tip of the injecting needle 24 by the tension body 35 pulled by the operating lever 11, and the injecting needle 24 is attracted by the attracting member 33. When the opening / closing body 18 is operated to open the liquid supply path 23 by the operation lever 11 in the state of being stabbed inside, the liquid is supplied from the injection needle 24 into the plant.
According to the herbicide injection device 3 of Embodiment 1 configured as described above, the injection needle 24 having the injection hole 31 having the above-described configuration is provided. Therefore, when the injection needle 24 is stabbed into a plant, the contents of the plant are Since the injection hole 31 can be prevented from being clogged and the attracting member 33 is provided, the reliability of the operation of bringing the plant stem P close to the tip of the injection needle 24 is increased, so that the injection operation can be performed efficiently. Moreover, since the stem P of the plant can be bent, the plant can be effectively killed and the herbicidal effect can be improved.

Embodiment 2. FIG.
In the first embodiment, when the opening / closing body 18 is pressed by the operation lever 11, the opening / closing port 17 b of the opening / closing supply path 17 is opened. However, according to the pressing amount of the operation lever 11 pressing the opening / closing body 18. The opening / closing port 17b of the opening / closing supply path 17 may be opened / closed. That is, as shown in FIG. 12, an opening / closing body 18A including a channel opening part 210 that communicates the opening / closing port 17b and the opening / closing supply path 17, and a channel blocking part 211 that blocks the opening / closing port 17b and the opening / closing supply path 17; did. Accordingly, as shown in FIG. 12A, when the operation lever 11 is not pressed, the opening / closing port 17b of the opening / closing supply path 17 is closed by the flow path closing portion 211 by the spring force of the return spring 17a. As shown in FIG. 12B, the opening / closing opening 17b of the opening / closing supply passage 17 and the opening portion 210 of the opening / closing supply passage 17 are opened and closed with a pressing amount so that they partially coincide or coincide with each other. When the body 18A is pressed, the opening / closing opening 17b of the opening / closing supply path 17 and the flow path opening portion 210 communicate with each other by the spring force of the return spring 17a to open the opening / closing supply path 17. When the operation lever 11 is further operated until the opening / closing port 17b of the opening / closing supply path 17 and the flow path opening part 210 of the opening / closing body 18A do not coincide with each other, the flow path closing part 211 becomes the spring of the return spring 17a. Due to the force, the opening / closing port 17b of the opening / closing supply path is closed. According to this, since the open / close supply path 17 is opened only when the opening / closing port 17b and the flow path opening portion 210 partially match or coincide with each other, the herbicide is not sprayed wastefully.

Embodiment 3. FIG.
As shown in FIG. 13, the operation lever 11 is rotatably provided on the outer peripheral surface of the extension body 13. According to the third embodiment, since the base 12 can be omitted, the apparatus can be reduced in size and cost.

Embodiment 4 FIG.
As shown in FIG. 14, the front-side inclined straight portion 83 of the wing portion 82 of the guide 10 may be a front-side inclined portion 83 </ b> A formed by a curve. The front inclined portion 83A includes a gentle inclined portion 83a that extends from the distal end of the wing portion 82 in a direction toward the central axis a of the injection needle 24, and a steep inclined portion that extends in a direction from the gentle inclined portion 83a toward the distal end of the injection needle 24. 83b. In other words, the angle formed between the gently inclined portion 83a and the central axis a is larger than the angle formed between the steeply inclined portion 83b and the central axis a. Further, in the steeply inclined portion 83b, an angle formed between the gentle inclined portion 83a side and the central axis a is smaller than an angle formed between the injection needle 24 side and the central axis a. According to the fourth embodiment, the plant stem P is smoothly guided to the distal end side of the injection needle 24 by the front inclined portion 83 </ b> A of the guide 10. That is, when the plant stem P comes into contact with the gently inclined portion 83a in the first stage of the closing operation of the attracting member 33, the inclination angle of the gently inclined portion 83a is loose, so as the closing operation of the attracting member 33 proceeds, After the plant stem P moves smoothly in the direction toward the central axis a of the injection needle 24, the lateral deviation is restricted by the steeply inclined portion 83b, and the plant stem P moves reliably to the tip of the injection needle 24.

Embodiment 5. FIG.
As shown in FIG. 15, only one of the left and right attracting members 33 may be provided. Even in this configuration, the plant stem P can be brought close to the tip of the injection needle 24.

Embodiment 6. FIG.
As shown in FIG. 16, a structure may be provided in which a pulling member 33 </ b> A that performs a rectilinear movement in a direction approaching the tip of the injection needle 24 and a direction away from the tip of the injection needle 24 is provided. Even in this configuration, the plant stem P can be brought close to the tip of the injection needle 24.

Embodiment 7. FIG.
As shown in FIG. 1C, the opening 31 t of the injection hole 31 serving as the injection port may be an injection needle 24 that opens on the outer surface of the tip portion 27 having a conical shape. That is, an injection needle 24 having an injection hole 31 penetrating the internal flow path 29 and the outer peripheral surface of the distal end portion 27 may be used.
Even when the injection needle 24 is pierced into the plant stem P, the contents of the plant move on the conical surface of the tip 27, so that the contents of the plant are difficult to enter the injection hole 31, and the contents of the plant Is less likely to clog the injection hole 31.

Embodiment 8. FIG.
In the through hole 87 of the injection needle fixing portion 25, the liquid flow path by the through hole 87 is closed when the liquid pressure of a predetermined value or more is not applied, and the liquid by the through hole 87 is applied when the liquid pressure of the predetermined value or more is applied. An open / close valve that opens the flow path is provided. When such an opening / closing valve is provided, it is possible to prevent the herbicide from leaking from the injection hole 31 when the herbicide remains in the injection device side supply path 7.

It is good also as a structure provided with the supporting member 34 which also has the function of the guide 10, without providing the guide 10 separately.
It is good also as a structure which is not provided with the drawing member 33 and the guide 10. FIG. That is, the structure may be such that the plant stem P is held with one hand and the injection needle 24 is pierced into the stem P, and then the operating lever 11 is operated to spray the herbicide from the injection hole 31.
In the above description, the herbicide injection device 3 as a liquid supply device to a plant has been described. However, the liquid supply device to a plant of the present invention is also used as a liquid supply device for supplying a liquid for replenishing nutrients to a plant. Is possible. In this case, the structure for bending the plant stem P is unnecessary.

1 herbicidal device, 2 herbicide pressurizing device, 3 herbicide injection device (liquid supply device),
6 opening and closing device, 11 operation lever, 12 base, 13 extension body, 18 opening and closing body,
23 liquid supply path, 24 injection needle, 26 shaft portion, 27 tip portion, 28 receiving port,
29 inner flow path, 30 outer peripheral surface of injection needle, 31 injection hole, 33 attracting member,
35 Tensile body.

Claims (8)

  A liquid injection method in which an injection needle is inserted into a plant and liquid is injected into the plant via an internal flow path formed inside the injection needle, and the injection needle penetrates the outer peripheral surface of the injection needle and the internal flow path. A method for injecting liquid into a plant, comprising providing an injection hole and injecting the liquid into the plant from the outer peripheral surface of the injection needle through the injection hole.   In a liquid injection apparatus having an injection needle for injecting liquid into a plant, the injection needle injects liquid received by being pressurized from a liquid supply source and liquid received at the reception opening. An apparatus for injecting a liquid into a plant, comprising: an internal flow path leading in the direction of the tip of the needle; and an injection hole penetrating the internal flow path and the outer peripheral surface of the injection needle.   The injection needle includes a shaft portion having a constant diameter and a tip portion that is provided at one end of the shaft portion and is sharply formed to pierce the plant, and the receiving port, the internal channel, and the injection hole are the shaft portion. The device for injecting a liquid into a plant according to claim 2, wherein the device is formed as described above.   A liquid supply path connecting the liquid supply source and the receiving port, an opening / closing device having an opening / closing body for opening / closing the liquid supply path, and an operating lever for operating the opening / closing of the liquid supply path by the opening / closing body. The liquid injection device for a plant according to claim 2 or 3, wherein the liquid injection device is a plant.   An attracting member that attracts the plant to the tip of the injection needle is provided, and the attracting member and the operation lever are coupled so as to interlock with each other, and the operation lever operates to bring the attraction member closer to the tip of the injection needle. The apparatus for injecting a liquid into a plant according to claim 4, wherein the opening / closing body is operated so as to open the liquid supply path.   6. The apparatus for injecting a liquid into a plant according to claim 5, wherein the attracting member is provided symmetrically about the central axis of the injection needle.   The apparatus for injecting a liquid into a plant according to claim 5 or 6, further comprising a guide for guiding the plant attracted to the distal end side of the injection needle by the attracting member to the distal end of the injection needle.   The apparatus for injecting a liquid into a plant according to claim 7, wherein the attracting member applies a force for bending the plant to the plant by pressing the plant against the guide.

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