JP2005218443A - Chemical feed machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a load of work for supplying a chemical to soil covered with a mulch film. <P>SOLUTION: A chemical feed machine is equipped with chemical supply channels 37, 38 joined to a chemical container 36, a nozzle 25 attached to an end of the chemical supply channel 38 and having a discharge opening 25a, a pump 30 interposed between the chemical supply channels 37, 38 and conducting suction/discharge by reciprocating motion, a stop plate 24 positioned above the discharge opening 25a of the nozzle 25 and connected to the pump 30, and spindle parts 21, 22 which are fastened to the stop plate 24 and between which an expanding and contracting part 33 is interposed. When the stop plate 24 is pressed on the mulch film F positioned on a surface of the soil D, the spindle parts 21, 22 are contracted by means of the expanding and contracting part 33, and simultaneously the stop plate 24 is upward thrust, so that the pump 30 operates to discharge the chemical in the soil through the discharge opening 25a of the nozzle 25. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chemical solution injector, and more particularly, to a device for injecting chemical solutions such as agricultural chemicals and chemical fertilizers into soil.

When the crop surface is cultivated by covering the soil surface with a multi-film, simply spraying the chemical solution cannot infiltrate the chemical solution into the soil because the soil is covered with the multi-film. Therefore, various devices for injecting chemicals into soil through a multi-film have been provided.
For example, a chemical liquid injector 1 shown in FIG. 15 has a tube 3 for sucking a chemical liquid Y in a chemical liquid tank T, and a ball valve V1 urged in a closed state by a valve spring S1 between the tube 3 and the chemical liquid flow path 6. A cylinder 4 communicated with the chemical liquid flow path 6, a piston 5 that slides inside the cylinder 4 and is urged downward by a spring S3, a lever 2 that moves the piston 5 up and down, and a nozzle 7a at the lower end of the discharge hole 7b. Are fixed to the upper side of the nozzle 7a of the chemical liquid supply pipe 7 and the ball valve V2 urged in a closed state by the valve spring S2 between the chemical liquid flow path 6 and the chemical liquid supply pipe 7. A stop plate 8 is provided.

  In the chemical solution injector 1, the piston 5 is lifted by the operator pulling up the lever 2 while the stopper plate 8 is in contact with the multi-film while the nozzle 7 a is pierced from the multi-film covering the soil. The chemical liquid Y in the cylinder 4 flows out into the chemical liquid flow path 6, the ball valve V <b> 2 is opened by the outflow pressure, and the chemical liquid Y is injected into the soil from the discharge hole 7 b. When the lever 2 is lowered and the piston 5 is lowered, the negative pressure causes the ball valve V1 to be opened and the ball valve V2 to be closed, so that the chemical Y in the chemical tank T is sucked through the tube 3. The cylinder 4 is replenished.

  However, in the chemical solution injector 1 shown in FIG. 15, the operator needs to operate the lever 2 for each injection, and for example, about 2000 operations of the lever 2 are required per 10 a (R). . In normal work, work in the range of 70a to 100a per day is performed, and therefore, the work of injecting the chemical Y accompanied by the lever operation has a problem that is a very heavy burden on the operator.

FIG. 16 shows a soil disinfecting machine 9 disclosed in Japanese Patent Application Laid-Open No. 2002-253106, a mounting hitch 10 for connecting to a management machine (not shown), a chemical tank 11 for storing chemicals, A tube 14 connected to the chemical solution tank 11, a pump 13 provided in the tube 14, a chemical solution injection blade 15 provided at the distal end side of the tube 14 and having a discharge port 17, and a pump 13 through a chain 16. And a ground ring 12 connected thereto.
This soil disinfecting machine 9 is driven by a management machine while the chemical injection sword 15 is pierced into the soil, so that the pump 13 is operated according to the number of rotations of the ground ring 12 and a predetermined amount is discharged from the discharge port 17 into the soil. Is injected.

However, in the soil disinfecting machine 9 shown in FIG. 16, there is a problem of breaking the straw when used for work in the upright field, and the multi-film is broken when used for work in the field covered with the multi-film. Problem occurs.
JP 2002-253106 A

  This invention is made | formed in view of the said problem, and makes it a subject to provide the chemical | medical solution injection | pouring machine which can supply the chemical | medical solution to soil with a small work burden.

In order to solve the above problems, the present invention is a chemical solution injector for injecting a chemical solution into soil,
A chemical solution supply path connected to the chemical solution container storing the chemical solution,
A nozzle attached to the tip of the chemical solution supply path and having a discharge port;
A pump interposed in the chemical solution supply path and performing suction / discharge by reciprocating motion;
A stop plate provided above the discharge port of the nozzle and connected to the pump;
A support shaft fixed to the stop plate and provided with an expansion / contraction means,
By penetrating the nozzle into the soil, moving the support shaft portion downward and pressing the stop plate against the soil surface, the support shaft portion contracts and the stop plate is pushed upward by the expansion and contraction means. Thus, there is provided a chemical liquid injector characterized in that the pump is operated and the chemical liquid is discharged into the soil from the discharge port of the nozzle.
Moreover, this invention is applicable to inject | pouring a chemical | medical solution in soil irrespective of the presence or absence of a multi film.

  If it is set as the said structure, an operator can inject | pour a chemical | medical solution easily in soil only by carrying out the insertion / extraction of the said nozzle to soil, and can make special operation, such as lever operation, unnecessary. In particular, it is possible to drastically reduce the burden on the operator in the injection work in a wide field. Specifically, the nozzle is pierced into the soil and the stopper plate is pressed against the soil surface, so that the stopper plate moves upward due to the contraction of the expansion and contraction means, and the pump is operated along with the movement of the stopper plate. Can be automatically discharged from the nozzle.

  Note that it is preferable that the stopper plate be biased downward by a spring because the stopper plate surely returns downward when the nozzle is extracted from the soil. Further, as a means for linking the stop plate to the pump, for example, a connecting piece fixed to a support shaft at a position lower than the expansion / contraction means may be linked to the pump.

  The support shaft is provided with a stopper for limiting the expansion / contraction distance of the expansion / contraction means.

  With the above configuration, even when the operator pierces the nozzle strongly into the soil, the movement of the stopper plate is limited to a predetermined distance by the stopper, so that it is possible to prevent a large amount of chemical from being discharged from the pump. Further, by adjusting the stopper to adjust the expansion / contraction distance of the expansion / contraction means, the discharge amount can be set to a desired value.

Specifically, the support shaft portion is fitted in the tubular first support shaft portion so that the upper side of the second support shaft portion is slidable from below,
The stopper is configured to position and fix an annular piece slidably fitted to the second support shaft portion with an adjusting screw, and when the second support shaft portion contracts while being slid and accommodated upward inside the first support shaft portion. The upper end edge of the annular piece abuts on the lower end edge of the first support shaft portion and contracts and stops.

  With the above configuration, the second support shaft portion is slid into the first support shaft portion by thrusting the nozzle into the soil and pushing the stopper plate upward, thereby performing the contraction operation of the support shaft portion. In addition, it is possible to easily form the role of a stopper by the structure in which the annular piece and the first support shaft part interfere with each other.

  The second support shaft portion is provided with a positioning hole, and the annular piece is provided with a plurality of screw holes displaced in the axial direction, and the positioning is performed from among the plurality of screw holes. It is preferable that the amount of the chemical discharged from the discharge port of the nozzle can be finely adjusted by selecting and changing the screw hole through which the adjustment screw is passed and fixed so as to match the hole.

  With the above configuration, the distance between the upper end edge of the annular piece and the lower end edge of the first support shaft portion, that is, the support shaft portion is changed by selectively changing the screw hole for attaching the adjusting screw from the plurality of screw holes of the annular piece. The expansion / contraction distance of the pump can be finely adjusted, and the chemical solution discharge amount of the interlocking pump can be finely adjusted. Therefore, it is possible to improve accuracy by correcting a minute difference in the discharge amount between each product due to a manufacturing error.

The support shaft portion includes a first support shaft portion and a second support shaft portion slidably attached to the first support shaft portion.
The stopper includes a stop piece fixed to protrude sideways from the second support shaft portion, and a stopper screw screwed to a screw mounting portion protruding sideways from the first support shaft portion,
The stopper screw is attached in a state in which a gap is opened with the tip directed toward the stop piece, and the stopper shaft is moved when the first support shaft portion and the second support shaft portion are relatively slid and contracted. It is also preferable to adopt a configuration in which the tip of the screw for use comes into contact with the stop piece and stops contracting.

  With the above configuration, the contraction distance of the support shaft can be continuously adjusted by changing the separation distance between the stopper screw and the stop piece, so that the discharge amount of the pump can also be adjusted continuously. The amount of the chemical discharged from the nozzle outlet can be finely adjusted with high accuracy.

  The nozzle is integral with the stop plate.

  By integrating the nozzle with the stopper plate in this way, the distance from the stopper plate to the nozzle outlet is always constant, and the depth of insertion of the nozzle into the soil is constant without the operator being particularly conscious. The discharge depth of the chemical solution in the soil can be kept constant.

  Alternatively, the nozzle is separated from the stop plate, and the nozzle is connected and fixed to a support shaft portion located above the expansion / contraction means so that the nozzle does not follow the movement of the stop plate.

With the above configuration, when the nozzle is pierced into the soil, even if the soil is hard and resistance is generated and the nozzle is pushed back, the stopper plate separate from the nozzle is not loaded and the expansion and contraction means do not expand and contract. Can be prevented from malfunctioning.
When the nozzle can be stabbed into the soil, the stopper plate abuts against the soil surface and is pushed back, so that the stopper plate moves upward by the expansion and contraction means to operate the pump, while the nozzle follows the stopper plate. It is possible to enter the soil as it is without discharging and discharge the chemical.

As is clear from the above description, according to the present invention, the operator simply stabs the nozzle into the soil and presses the stopper plate against the soil surface, and the stopper plate moves upward by contraction of the expansion and contraction means. Can be automatically discharged from the nozzle.
Therefore, a special operation such as a lever operation is unnecessary, and the burden on the operator can be drastically reduced.

A first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a chemical solution injector 20 for multi-film cultivation, and a small-diameter tubular second support portion 22 is provided at the lower end of a large-diameter tubular first support portion 21 having a gripping portion 40 at a substantially L-shaped upper end. The upper end side of the second support shaft 22 is slidably fitted into the telescopic means 23, and a stopper plate 24 is fixed to the lower end of the second support shaft portion 22. Further, the nozzle 25 having a taper shape from the lower surface of the stopper plate 24 and having the discharge port 25a is fixed in a state of protruding downward, and the nozzle 25 and the stopper plate 24 are integrated.

  A horizontal piece 26 is fixed to the first support shaft portion 21, and a vertical piece 27 is provided continuously at the end of the horizontal piece 26, and a diaphragm pump 30 is fixed to the horizontal piece 26. Has been. As shown in FIG. 2, a rotary shaft 28 is rotatably fitted in the bearing portion 27a at the lower end of the vertical piece 27, and the other end of the connecting piece 29 having one end fixed to the rotary shaft 28 is connected to the second piece. It is fixed to the support shaft part 22 by a fixing part 39.

  The diaphragm pump 30 includes a membrane-shaped diaphragm 43 sandwiched between an upper housing 41 and a lower housing 42 and fixed with screws 44, and a movable shaft 34 projecting downward is connected to the diaphragm 43 to form a tubular shape of the lower housing 42. The protrusion 42a is extended through. The lower end of the movable shaft 34 is fixed to the connecting piece 29 through a fixed shaft 35, and a spring B is fitted around the movable shaft 34 at a position between the lower end of the protruding portion 42a and the fixed shaft 35. The lower housing 42 is fixed to the horizontal piece 26 with a nut 52.

  The upper housing 41 projects a tubular suction part 45 and a discharge part 46 from the upper surface. Inside the suction part 45, a spherical valve 48 and a spring 47 are fitted and arranged in this order from the top. On the contrary, the spring 50 and the ball valve 49 are fitted in the order from the top. A space formed by the upper housing 41 and the diaphragm 43 is a chemical solution space 51.

  The suction part 45 of the diaphragm pump 30 is connected to an end of a suction tube (chemical liquid supply path) 37 connected to a chemical liquid container 36 storing a chemical liquid, while a discharge tube (chemical liquid) is connected to the discharge part 46. A supply path) 38 and an end portion of the discharge tube 38 is connected to and communicated with the upper end of the nozzle 25.

  As shown in FIGS. 1 and 2, a scale M indicating the discharge amount of the chemical liquid is attached to the outer surface of the second support shaft portion 22 above the fixed portion 39 and a stopper 33 is attached. The stopper 33 externally fits the annular piece 31 having the through hole 31a to the second support shaft portion 22, and tightens the shaft portion 32b of the adjusting screw 32 protruding from the knob portion 32a through the shaft portion 32b through the through hole 31a. Thus, the annular piece 31 is fixed at a predetermined scale M position.

Next, the operation principle of the chemical solution injector 10 will be described with reference to FIG.
Hold the gripping part 40 in a state where an operator hangs a shoulder bag (not shown) containing the chemical solution container 12 on the shoulder, and the nozzle 25 is placed on the soil D covered with the multifilm F at an arbitrary position. And the bottom surface of the stopper plate 24 is brought into contact with the surface of the multi-film F. By pressing further downward from that state, the drag applied to the stop plate 24 is transmitted to the second support shaft portion 22, and the second support shaft portion 22 is moved into the first support shaft portion 21 by the expansion / contraction means 23. As the slide enters, the second support shaft portion 22 is pushed upward relative to the first support shaft portion 21.

  Along with the relative displacement of the second support shaft portion 22, the connecting piece 29 fixed by the fixing portion 39 tilts upward with the rotating shaft 28 as a fulcrum, and is fixed to the connecting piece 29 via the fixed shaft 35. The movable shaft 34 of the pump 30 is pushed upward against the spring B. Thereby, the diaphragm 43 is pushed up, the chemical solution space 51 is compressed, the spring 50 of the discharge part 46 is contracted, the ball valve 49 is opened, the chemical solution is transferred to the discharge tube 38, and the chemical solution is discharged from the discharge port 25 a of the nozzle 25. Is discharged into the soil D. At this time, since the nozzle 25 is integrated with the stop plate 24, the distance from the stop plate 24 to the discharge port 25a is always constant, and the discharge of the chemical solution in the soil D is not required by the operator. The depth can be kept constant.

  When the second support shaft portion 22 slides and rises to some extent with respect to the first support shaft portion 21, the annular piece 31 of the stopper 33 comes into contact with the lower end edge of the first support shaft portion 21 and stops, and does not slide any further. Thus, it is possible to make the discharge amount of the chemical liquid discharged from the diaphragm pump 30 constant.

  When the operator pulls out the chemical injector 10 from the soil D while holding the grip 40, the second spindle 22, the stop plate 24, the nozzle 25, the connecting piece 29 and the movable piece 29 are movable by their own weight and the biasing force of the spring B. The shaft 34 returns downward. As a result, the diaphragm 43 is pushed down, the chemical liquid space 51 is expanded and negative pressure is generated, the spring 47 of the suction part 45 of the diaphragm pump 30 is contracted, the ball valve 48 is opened, and the chemical liquid container is opened via the suction tube 37. The chemical solution is supplied from 36 to the chemical solution space 51.

  That is, the operator simply holds the gripping portion 40 of the chemical solution injector 10 and inserts and presses the nozzle 25 into the soil D from the top of the multi-film F without performing a special operation such as lever operation. Thus, a predetermined amount of the chemical solution Y can be automatically injected, and the workability of the chemical solution injection operation can be greatly improved. In addition, the connecting piece 29 fixed to the second support shaft portion 22 is not only fixed to the fixed shaft 35 but also fixed to the rotating shaft 28 serving as a tilting fulcrum. There is an advantage that a force required to lift the fixed shaft 35 connected to the member 34 is small.

4 and 5 show a second embodiment.
The difference from the first embodiment is that the nozzle 63 is separated from the stop plate 62 so that the nozzle 63 a does not follow the movement of the stop plate 62.

  The liquid injector 60 of the present embodiment fixes the long nozzle 63 to the horizontal piece 65 fixed to the first support shaft portion 21 in the vertical direction and is fixed to the lower end of the second support shaft portion 61. An insertion hole 62a is formed in the plate 62, and the nozzle 63 is slidably passed through the insertion hole 62a. A discharge port 63b is provided at the tapered tip portion 63a of the nozzle 63, and the distance between the stopper plate 62 and the discharge port 63a can be relatively displaced by the nozzle 63 sliding inside the insertion hole 62a. Further, an end portion of a discharge tube 64 connected to the discharge portion 46 of the diaphragm pump 30 is connected to the upper end portion 63 c of the nozzle 63. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

Next, the operation principle of the chemical solution injector 60 will be described with reference to FIG.
An operator holds the gripping part 40 in his / her hand, inserts the tip 63a of the nozzle 63 into an arbitrary position from above the soil D covered with the multifilm F, and abuts the bottom surface of the stopper plate 62 against the surface of the multifilm F. Let By further pressing downward from this state, the drag force applied to the stop plate 62 is transmitted to the second support shaft portion 61, and the second support shaft portion 61 is moved into the first support shaft portion 21 by the expansion / contraction means 33. As the slide enters, the second support shaft portion 61 is pushed upward relative to the first support shaft portion 21. At this time, the nozzle 63 enters the soil as it is without following the movement of the stop plate 62.

  Next, on the same principle as in the first embodiment, with the relative displacement of the second support shaft portion 61, the connecting piece 29 fixed by the fixing portion 39 tilts upward with the rotation shaft 28 as a fulcrum, and the fixed shaft The movable shaft 34 of the diaphragm pump 30 fixed to the connecting piece 29 via 35 is pushed upward against the spring B, and the chemical solution is transferred from the diaphragm pump 30 to the discharge tube 64, so that the nozzle 63 The chemical solution is discharged to the soil D from the discharge port 63b. Then, the annular piece 31 of the stopper 33 comes into contact with the lower end edge of the first support shaft portion 21 and stops so that the contraction distance of the expansion / contraction means 23 is limited so that the discharge amount of the chemical liquid becomes constant.

  Further, when the soil D is hard, it is conceivable that resistance is generated when the tip 63a of the nozzle 63 is pierced into the soil D covered with the multi-film F, and the nozzle 63 is pushed back. In the machine 60, since the nozzle 63 and the stop plate 62 are separate, the load on the nozzle 63 is not transmitted to the stop plate 62 and the expansion / contraction means 33 does not expand / contract, thus preventing the diaphragm pump 30 from malfunctioning. There is an advantage that you can.

FIG. 6 shows a third embodiment.
The difference from the second embodiment is that a substantially T-shaped grip 72 is provided at the upper end of the first support shaft 71. Since other configurations are the same as those of the second embodiment, the same reference numerals are given and description thereof is omitted.
According to the chemical solution injector 70 of this embodiment, even when the soil is hard and force is required to pierce the nozzle 63, the operator can hold the grip portion 72 with both hands and push it down strongly.
Needless to say, the T-shaped gripping portion 72 of the present embodiment is applicable to all embodiments of the present invention.

FIG. 7 shows a fourth embodiment.
The difference from the first embodiment is that a large annular plate 76 having a larger diameter than the stopper plate 24 is attached to the stopper plate 24 as an attachment, and the area of the stopper plate 24 is increased.

  A plurality of mounting holes 24a are formed in the stop plate 24 in the circumferential direction. The large annular plate 76 is provided with an opening 76a at the center, and a plurality of mounting holes 76b are formed at positions corresponding to the mounting holes 24a of the stopper plate 24. Then, with the nozzle 25 inserted through the opening 76a, the large annular plate 76 is overlaid on the lower surface of the stop plate 24, and bolts 75 are passed through and fastened to the connecting mounting holes 24a and 76b. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

With the above configuration, when the nozzle 25 is pierced into the soil, the large annular plate 76 comes into contact with the soil surface, and the ground contact area becomes larger than when only the stop plate 24 is used. 24 subsidence can be prevented.
In addition, it cannot be overemphasized that the means which uses the macrocyclic board 76 of this embodiment as an attachment is applicable to all embodiment of this invention.

8 and 9 show a fifth embodiment.
The difference from the second embodiment is that a cylinder type pump 81 is used instead of the diaphragm type pump.

In the chemical injector 80 of the present embodiment, the lower end portion 82 a of the cylinder portion 82 of the cylinder pump 81 is fixed to the horizontal piece 26 fixed to the first support shaft portion 21.
As shown in FIG. 9, the cylinder type pump 81 includes a cylinder part 82 and a branch part 84,
One end of a branching portion 84 is connected to an end of a suction tube (chemical solution supply path) 37 connected to the chemical solution container 36, while a discharge tube (chemical solution supply passage) 90 is connected to the other side and discharged. The end of the tube 90 is connected to the upper end 63 c of the nozzle 63.

  A spherical valve 86 and a spring 87 are provided in this order from the upstream side on the suction tube 37 side of the flow path 85 in the branch portion 84, while a spring 89 and a spherical valve 88 are provided in the order from the downstream side on the discharge tube 90 side. The piston 83 is fitted inside the cylinder portion 82.

  The piston 83 includes a head portion 83 a that is in sliding contact with the inner surface of the cylinder portion 82, and a shaft portion 83 b that extends from the tubular lower end portion 82 a of the cylinder portion 82. The lower end of the shaft portion 83b is fixed to the connecting piece 29 via the fixed shaft 35, and a spring B is fitted on the shaft portion 83b between the lower end of the lower end portion 82a and the fixed shaft 35.

Next, the operation principle of the chemical solution injector 80 will be described.
The tip 63a of the nozzle 63 is inserted from above the soil D covered with the multi-film F, and the bottom surface of the stop plate 62 is brought into contact with the surface of the multi-film F and pressed downward. The drag force is transmitted to the second support shaft portion 61, the second support shaft portion 61 slides into the first support shaft portion 21 by the expansion / contraction means 33, and the second support shaft portion 61 is moved into the first support shaft portion 21. Is pushed upward relatively.

Accordingly, the connecting piece 29 tilts upward with the rotary shaft 28 as a fulcrum, and the shaft portion 83b of the cylinder type pump 81 fixed to the connecting piece 29 via the fixed shaft 35 moves upward against the spring B. When pushed up, the head portion 83 a of the piston 83 rises in the cylinder portion 82. Thereby, the chemical solution in the cylinder part 82 is compressed, the spring 89 on the discharge tube 90 side contracts, the ball valve 88 is opened, the chemical solution is transferred to the discharge tube 90, and the chemical solution is discharged from the discharge port 63 b of the nozzle 63. It is discharged into the soil D.
Since other configurations are the same as those of the second embodiment, the same reference numerals are given and description thereof is omitted.

10 to 12 show a sixth embodiment.
The chemical solution injector 100 of the present embodiment allows the distance from the stop plate 62 to the tip portion 107a of the nozzle 107 to be variable and allows fine adjustment of the fixing position of the annular piece 102 serving as a stopper.

  The second support shaft portion 101 slidably fitted to the lower end of the first support shaft portion 21 having the grip portion 40 at the upper end is provided with a plurality of positioning holes 101a penetrating the adjustment screw 103 at a required interval. Yes. An annular piece 102 is slidably fitted on the second spindle 101, and a plurality of screw holes 102a to 102c that are displaced in the axial direction are formed in the annular piece 102 as shown in FIG. The adjusting screw 103 is fixed by screwing one of the screw holes 102a to 102c with the positioning hole 101a. That is, the discharge amount is determined depending on which positioning hole 101a the adjustment screw 103 is fixed to via the annular piece 102.

A tubular third support shaft 104 is slidably fitted below the second support shaft 101, and a disc-shaped stop plate 62 is fixed to the lower end of the third support shaft 104. .
The third spindle 104 is provided with a plurality of positioning screw holes 104a to 104c at required intervals, and a corresponding positioning hole (see FIG. 5) is formed on the lower end side of the second spindle 101 inserted therein. (Not shown) is perforated.
In the shipped state, the lowermost screw hole 104a of the third spindle 104 is aligned with the positioning hole (not shown) of the second spindle 101 and fixed with the adjusting screw 105, The distance L1 between the nozzle tip portion 107a is set.

  A vertical bar 106 is suspended downward from a horizontal piece 65 fixed to the first support shaft 21, and a long nozzle 107 is fixed by protruding from the lower end of the vertical bar 106. The nozzle 107 slidably passes through the insertion hole 62a of the stopper plate 62, and a discharge port 107b is provided at the tapered tip portion 107a.

The chemical injector 100 moves the stopper plate 62 upward at the time of inspection before shipment to measure the discharge amount of the chemical solution from the discharge port 107b by the diaphragm pump 30, and the plurality of screw holes 102a of the annular piece 102 are measured. By selecting a screw hole to which the adjustment screw 103 is attached from ˜102c, the difference in the discharge amount between products due to manufacturing errors is finely adjusted.
That is, as shown in FIG. 11A, when the adjustment screw 103 is fixed by screwing the screw hole 102b at the center in the axial direction of the annular piece 102 with the positioning hole 101a of the second support shaft part 101. In comparison, as shown in (B), when the upper screw hole 102a is aligned with the positioning hole 101a and screwed with the adjusting screw 103, the lower end of the first support shaft 21 and the upper end of the annular piece 102 are compared. The product error of the amount of chemical liquid discharged is finely adjusted by taking advantage of the longer distance between

Further, when the user wants to adjust the distance between the stop plate 62 and the nozzle tip portion 107a after shipment, as shown in FIGS. 12 (A) and 12 (B), the screw at the center of the third support shaft portion 104 is used. By aligning the hole 104b or the uppermost screw hole 104c with a positioning hole (not shown) of the second spindle 101 and fixing with the adjusting screw 105, the distance between the stop plate 62 and the nozzle tip 107a is set to L2. Alternatively, it can be adjusted to L3. (L1>L2> L3)
Since other configurations are the same as those of the second embodiment, the same reference numerals are given and description thereof is omitted.

13 and 14 show a seventh embodiment.
The chemical injector 110 according to the present embodiment uses the stopper screw 114 and the stop piece 113a as stoppers, so that the discharge amount of the diaphragm pump 30 can be continuously finely adjusted.

  A plurality of gripping portion mounting holes 111a to 111c are formed at intervals in the tubular first support shaft portion 111, and a shaft portion (not shown) of the gripping member 117 made of a separate body is located at an optimal position. It penetrates through the holding part mounting hole 111a and is fastened and fixed by a nut 118. The horizontal piece 112 fixed below the first support shaft portion 111 is provided with a screw mounting portion 112a protruding sideways, and a seal sticking portion 112b protruding downward from a side surface in the vicinity of the screw mounting portion 112a. Provided. A stopper screw 114 is screwed downward in a screw hole (not shown) of the screw mounting portion 112a. The stopper screw 114 has a shaft portion 114b whose outer peripheral surface is engraved with a thread protruding from a large-diameter head portion 114a, and a tip portion of the shaft portion 114b having a larger diameter than the shaft portion 114b. 114c is fixed. In addition, a slip prevention nut 115 is externally screwed onto the stopper screw 114 at the upper surface position of the screw mounting portion 112a.

  A second support shaft portion 113 is slidably fitted in the lower end of the first support shaft portion 111, and a stop piece 113a is welded to a required position of the second support shaft portion 113 in a state of protruding laterally in the horizontal direction. It is fixed, and a gap is provided between the stop piece 113a and the contact portion 114c of the stopper screw 114. In addition, a scale seal 116 is attached to the seal pasting portion 112b for displaying the amount of the chemical discharged from the diaphragm pump 30 at a time and injected into the soil from the discharge port 119b of the tip 119a of the nozzle 119. . In addition, since the other structure is the same as that of other embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

Next, the operation principle of the chemical solution injector 110 will be described.
When the operator holds the grip portion 117 in his / her hand, inserts the nozzle 119 into the soil covered with the multi-film, and presses the bottom surface of the stop plate 62 further downward from the multi-film surface, the second support The shaft 113 is slid into the first support 111 and the second support 113 is pushed upward relative to the first support 11.

In accordance with the relative displacement of the second support shaft 113, the diaphragm pump 30 operates to inject the chemical solution from the discharge port 119b of the nozzle 119 into the soil D, and the second support shaft 113 becomes the first support shaft 11. When the slide rises to some extent, the abutting portion 114c at the lower end of the stopper screw 114 comes into contact with the upper surface of the stop piece 113a and stops, and no further sliding contraction occurs. Therefore, it is possible to make the discharge amount of the chemical liquid discharged from the diaphragm pump 30 constant. Further, since the stopper screw 114 can continuously adjust the separation distance from the stop piece 113a, the discharge amount of the pump 30 can also be continuously adjusted, and the discharge amount of the chemical liquid can be finely adjusted with high accuracy. It becomes possible.
In the above-described chemical solution injector 110, during the inspection before shipment, the stopper plate 62 is moved upward to measure the amount of the chemical solution discharged from the discharge port 119b by the diaphragm pump 30, and the seal sticking portion of the scale seal 116 By adjusting the attachment position to 112b, it is possible to finely adjust the difference in discharge amount between products due to manufacturing errors.

It is a side view of the chemical solution injector of the first embodiment of the present invention. It is sectional drawing of the diaphragm type pump vicinity. It is a side view of a chemical injection device at the time of chemical discharge. It is a side view of the chemical solution injector of the second embodiment. It is a side view of a chemical injection device at the time of chemical discharge. It is a side view of the chemical injection machine of 3rd Embodiment. It is a principal part perspective view of 4th Embodiment. It is a side view of the chemical solution injector of the fifth embodiment. It is sectional drawing of a cylinder type pump vicinity. It is a perspective view of the chemical solution injector of the sixth embodiment. It is drawing explaining the fine adjustment of the fixed position of an annular piece. (A) and (B) are the principal part perspective views explaining position adjustment of a stop plate. It is a perspective view of the chemical injection device of 7th Embodiment. It is a principal part enlarged view of the chemical injection device of 7th Embodiment. It is sectional drawing of the chemical | medical solution injection machine of a prior art example. It is a side view of another conventional soil disinfector.

Explanation of symbols

20 Chemical solution injector 21 First support shaft portion 22 Second support shaft portion 23 Extending / contracting means 24 Stop plate 25 Nozzle 25a Discharge port 29 Connecting piece 30 Diaphragm pumps 31, 102 Annular pieces 32, 103 Adjustment screw 33 Stopper 34 Movable shaft 36 Chemical liquid container 37 Suction tube (chemical liquid supply path)
38 Discharge tube (chemical solution supply path)
76 Large annular plate 81 Cylinder pump 101a Positioning holes 102a to 102c Screw hole B Spring D Soil F Multifilm M Scale Y Chemical liquid

Claims (7)

A chemical solution injector for injecting chemical solution into the soil,
A chemical solution supply path connected to the chemical solution container storing the chemical solution,
A nozzle attached to the tip of the chemical solution supply path and having a discharge port;
A pump interposed in the chemical solution supply path and performing suction / discharge by reciprocating motion;
A stop plate provided above the discharge port of the nozzle and connected to the pump;
A support shaft portion fixed to the stop plate and provided with an expansion / contraction means,
By penetrating the nozzle into the soil, moving the support shaft portion downward and pressing the stop plate against the soil surface, the support shaft portion contracts and the stop plate is pushed upward by the expansion and contraction means. The chemical liquid injector is configured such that the pump is operated and the chemical liquid is discharged to the soil from the discharge port of the nozzle.   The chemical injection device according to claim 1, wherein a stopper that limits an expansion / contraction distance of the expansion / contraction means is provided on the support shaft portion. The support shaft part is fitted in the tubular first support shaft part so that the upper side of the second support shaft part is slidable from below,
The stopper is configured to position and fix an annular piece slidably fitted to the second support shaft portion with an adjusting screw, and when the second support shaft portion contracts while being slid and accommodated upward inside the first support shaft portion. The chemical injection device according to claim 2, wherein the upper end edge of the annular piece abuts on the lower end edge of the first support shaft portion to stop the contraction.   The second support shaft portion is provided with a positioning hole, and the annular piece is provided with a plurality of screw holes displaced in the axial direction, and the positioning is performed from among the plurality of screw holes. 4. The chemical solution injector according to claim 3, wherein the amount of the chemical solution discharged from the discharge port of the nozzle can be finely adjusted by selecting and changing a screw hole through which the adjusting screw is fixed and fitted to the hole. The support shaft portion includes a first support shaft portion and a second support shaft portion slidably attached to the first support shaft portion,
The stopper includes a stop piece fixed to protrude sideways from the second support shaft portion, and a stopper screw screwed to a screw mounting portion protruding sideways from the first support shaft portion,
The stopper screw is attached in a state in which a gap is opened with the tip directed toward the stop piece, and the stopper shaft is moved when the first support shaft portion and the second support shaft portion are relatively slid and contracted. The drug solution injector according to claim 2, wherein the distal end of the screw for use is brought into contact with the stop piece to stop contracting.   The chemical solution injector according to any one of claims 1 to 5, wherein the nozzle is integrated with the stopper plate.   2. The nozzle according to claim 1, wherein the nozzle is separated from the stopper plate, and the nozzle is connected and fixed to a support shaft at a position above the expansion means so that the nozzle does not follow the movement of the stopper plate. 6. The chemical solution injector according to any one of 5 above.

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