Liquid spraying device

Abstract

Provided is a herbicide spraying device capable of easily changing the width of herbicide spraying. The herbicide spraying device (1) comprises a pair of upper shafts (2) facing each other at a specific interval in the front-rear direction, a pair of side frames (3) arranged on the left and right sides of the two upper shafts (2), a pair of operating handles (4) connected to the side frames (3), a nozzle (5) mounted on the upper shaft (2), a wheel (6) mounted on the side frames (3), and a covering sheet (7) covering the frame body composed of the pair of upper shafts (2) and the side frames (3) except for the bottom surface. The side frames (3) and the operating handles (4) are rotatably connected to the upper shaft (2), and when the pair of operating handles (4) are operated in the approach / separation direction with the rotation fulcrum of the upper shaft (2) as the center, the opening and closing angle θ between the left and right side frames (3) can be variably adjusted.

Description

Technical Field

[0001] The present invention relates to a liquid spraying device for spraying liquids such as herbicides on soil, and in particular to a liquid spraying device suitable for weeding operations between crops. Background Art

[0002] In a field where crops are cultivated, weeds tend to grow between crops. If weeds grow tall between crops, there is a risk that the crops will not grow well or become a habitat for pests and diseases. In order to prevent this, weeding operations are performed so that weeds do not grow between crops. In this weeding operation, a well-known method is to spray herbicides filled in a liquid tank of a power sprayer or a manual sprayer carried by an operator from a nozzle.

[0003] For example, Patent Document 1 proposes a liquid spraying device, which includes a gate-shaped splash plate formed by an upper frame and a pair of left and right side walls, an arm-shaped handle for moving the splash plate on the soil, and a nozzle installed on the upper frame, and sprays the herbicide sprayed from the nozzle downward from the space sandwiched between the left and right side walls. Here, the upper frame is a skeleton structure formed by combining a pair of left and right vertical ribs and a pair of front and rear transverse ribs, the side walls are plate-shaped structures with cover sheets installed on the side frames, and the upper part of the side frames is a pair of arms. These arms are inserted into the transverse ribs corresponding to the upper frame and fastened with fixing screws, and the opposing spacing of the two side walls can be adjusted by loosening the fixing screws and sliding the arms inserted into the transverse ribs.

[0004] When spraying herbicides between crops with the liquid spraying device constructed in this way, the operator makes the opposing distance between the two side walls consistent with the width between the crops, and then carries a power sprayer or a manual sprayer on his back to spray the herbicides in the liquid tank from the nozzle, while holding the handle and moving the splash plate between the crops. At this time, since the crops are protected by the two side walls of the splash plate, the herbicides sprayed from the nozzle will only be sprinkled on the weeds growing between the crops, and the crops can be prevented from being sprayed with the herbicides.

[0005] [Prior Technical Literature]

[0006] [Patent Document]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2009-142168 Summary of the invention

[0008] [Problems to be solved by the invention]

[0009] In the liquid spraying device disclosed in Patent Document 1, the splash plate has a pair of left and right side walls. Since the spacing between the two side walls can be adjusted by fixing screws, the herbicide can be sprayed on the entire area in the width direction between the crops as long as the spacing between the two side walls is preliminarily consistent with the maximum width between the crops. However, since the width between the crops for the splash plate to move often varies according to each row of crops, it is not easy to accurately spray the herbicide to the vicinity of the roots of the crops between all the crops. In addition, the crops do not all extend in a straight line with a certain width, because there are also crops whose width changes along the moving direction. Therefore, there may be a situation where the width between the crops suddenly narrows during the movement, making the splash plate unable to move forward; or conversely, the width between the crops expands, narrowing the spraying width of the herbicide, and the herbicide cannot be sprayed near the roots of the crops.

[0010] In addition, although it is also possible to temporarily stop moving the splash guard when the width between crops changes, loosen the fixing bolts and then readjust the spacing between the two side walls, in this case, as long as the width between crops changes, the weeding operation must be interrupted each time, that is, the splash guard must be stopped and the fixing bolts must be adjusted in this state, which makes the weeding operation precise near the roots of the crops complicated and time-consuming.

[0011] In addition, in the liquid spraying device disclosed in Patent Document 1, the paired left and right side walls formed on the splash guard can serve as a shield to prevent the herbicide from scattering. However, when the weeding operation is in progress and the wind blows, the herbicide sprayed from the nozzle will flow with the wind, causing the herbicide to overflow from the front and back of the splash guard, and there is a risk of the herbicide adhering to the surrounding crops and the operator.

[0012] The present invention is completed in view of the actual situation of the prior art as mentioned above, and its purpose is to provide a liquid spraying device that can easily change the spraying width of the liquid.

[0013] [Technical means to solve the problem]

[0014] In order to achieve the above-mentioned purpose, the liquid spraying device of the present invention includes: a pair of upper shafts, which are spaced apart by a specific interval in the front-to-back direction and extend in the left-to-right direction; a pair of side frames, which are arranged on the left and right sides of the two upper shafts; a pair of operating handles, which are used to move the two side frames; a nozzle, which is installed on the aforementioned upper shaft and sprays liquid in the space surrounded by the aforementioned two side frames; and a covering sheet, which at least covers the pair of aforementioned side frames, the aforementioned side frames are integrally connected to the aforementioned operating handles, and the aforementioned side frames and the aforementioned operating handles are rotatably supported by the aforementioned upper shafts, and the opening and closing angles between the pair of aforementioned side frames can be variably adjusted by operating the pair of aforementioned operating handles in the approach / separation direction with the rotation fulcrum of the aforementioned upper shaft as the center.

[0015] In the liquid spraying device thus constructed, the operator can hold the pair of operating handles, spray the liquid from the nozzles, and move the pair of left and right side frames between the crops near the roots of the crops, thereby protecting the crops from the liquid sprayed from the nozzles and spraying the liquid only on the portion sandwiched by the side frames. At this time, when the width between the crops located in front of the moving direction changes, the operator only needs to operate the two operating handles in the approaching / separating direction, and the operating handles and the side frames will rotate in conjunction with the connection portion with the upper shaft as the center, so that the opening and closing angles between the side frames can be easily adjusted according to the width between the crops.

[0016] In addition, in the above structure, a covering piece covering the front area surrounded by the upper shaft and the side frame on the front side and a covering piece covering the rear area surrounded by the upper shaft and the side frame on the rear side are further included, and the liquid spraying device is covered by the covering piece not only on the left and right sides but also in the front and rear directions. As a result, since the liquid is suppressed from flowing from the front and rear of the liquid spraying device due to wind, for example, it is possible to reliably prevent the liquid from overflowing from the front and rear of the liquid spraying device due to wind and adhering to crops or operators.

[0017] Furthermore, in the above structure, the covering sheet further covers between the paired upper shafts, so that even in a windy working environment, the liquid affected by the wind can be suppressed from flying around from above, thereby more reliably preventing the liquid from adhering to the surrounding crops or operators.

[0018] In the above structure, an angle fixing device capable of fixing the opening and closing angle between the paired side frames at a specific angle is further included, so that the angle fixing device can be used to reliably prevent the two side frames from falling due to being too tightly closed inwards, or the two side frames from being too open outwards to damage the crops. In addition, by releasing the opening and closing angle between the paired side frames fixed by the angle fixing device, the opening and closing angle of the paired side frames can be freely changed, such as matching the width between the crops.

[0019] In this case, the angle fixing device further includes: a bracket fixed on the upper shaft; a guide hole formed in the bracket and extending in an arc shape with the rotation fulcrum as the center; and a fixing screw passing through the guide hole and fixing the operating handle to the bracket, which is preferred because it can easily control the opening and closing angles between the two side frames.

[0020] In addition, if the guide hole is a continuous arc-shaped slit, not only can the fixing screws be tightened to keep the opening and closing angle between the two side frames fixed while moving forward, but if the fixing screws are loosened while moving forward, the relative positions of the fixing screws and the guide hole will change as the two operating handles are turned, thereby making it easy to adjust the opening and closing angle between the two side frames when the liquid spraying device is moving.

[0021] In addition, in the above structure, the side frame has: a rotating shaft, which is rotatably connected to the upper shaft; a pair of longitudinal shafts, which extend downward from the two ends of the rotating shaft; and a connecting member, which connects the lower end sides of the two longitudinal shafts, and the connecting member is equipped with multiple wheels. This is preferred because the two side frames can be moved smoothly by utilizing multiple wheels.

[0022] In this case, the connecting member of the side frame has a protrusion that protrudes further in the front-rear direction than the rotation axis, and each protrusion is equipped with a wheel, so that the wheel that protrudes further in the front-rear direction than the rotation axis can be more easily visually observed during operation. Therefore, since the wheel can be used as a positioning mark during operation, for example, it is possible to check whether the opening and closing angle of the side frame is consistent with the width between the crop rows while operating.

[0023] Furthermore, in the above structure, auxiliary covering plates are installed on both side frames, and the auxiliary covering plates cover the gap between the surface sprayed with liquid and the connecting member, thereby improving the shielding effect of the two side frames on the liquid.

[0024] In addition, in the above structure, the covering sheet is an agricultural plastic film, and the agricultural plastic film is fixed at any position on the upper shaft and the side frame using multiple fasteners. The agricultural plastic film generally used in agricultural plastic greenhouses can be utilized to install the covering sheet on the upper shaft and the two side frames.

[0025] In addition, the upper axis and the two side frames are constructed to be consistent with the pillars of the agricultural plastic greenhouse, so the pipe clamps of agricultural materials used to fix agricultural plastic film to the pillars can be used as fasteners, and the covering sheet can be easily posted and re-posted with readily available materials.

[0026] [Effects of the invention]

[0027] With the liquid spraying device of the present invention, the spraying width of the liquid can be easily changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] [ Figure 1 ] A three-dimensional appearance diagram of a herbicide spraying device according to an embodiment of the present invention.

[0029] [ Figure 2 ]Front view of the herbicide spraying device.

[0030] [ Figure 3 ]Top view of the herbicide spraying device.

[0031] [ Figure 4 ]Side view of the herbicide spraying device.

[0032] [ Figure 5 ] represents a side view of the nozzle installation structure.

[0033] [ Figure 6 ] represents a top view of the installation structure of the cover sheet.

[0034] [ Figure 7 ] represents a side view of the installation structure of the cover sheet.

[0035] [ Figure 8 ] is an explanatory diagram showing the usage of the herbicide spraying device.

[0036] [ Fig. 9 ] is an explanatory diagram showing another usage form of the herbicide spraying device.

[0037] [ Fig.10 ]An overhead view of a herbicide spraying device according to another embodiment of the present invention.

[0038] [ Fig.11 ]An overhead view of a herbicide spraying device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0039] Embodiments of the invention will be described with reference to the drawings. Figure 1 is a perspective view of the appearance of a herbicide spraying device in an embodiment of the present invention, Figure 2 is a front view of the herbicide spraying device, Figure 3 This is a top view of the herbicide spraying device. Figure 4 is a side view of the herbicide spraying device.

[0040] like Figures 1 to 4 As shown, the herbicide spraying device 1 of this embodiment includes a pair of upper shafts 2 arranged in parallel at a specific interval, a pair of side frames 3 arranged on both sides of the upper shaft 2, a pair of operating handles 4 of the side frames 3 moving on the soil, a pair of nozzles 5 installed on the upper shaft 2, four wheels 6 installed on the side frames 3, a covering sheet 7 covering the frame body composed of the pair of upper shafts 2 and the side frames 3 except the bottom surface, and a covering auxiliary plate 10 blocking the gap between the part of the covering sheet 7 covering each side frame 3 and the soil. However, in Figure 3 and Figure 4 The nozzle 5 and the cover sheet 7 are omitted.

[0041] The upper shaft 2 is a rod-shaped body formed by inserting a large diameter tube 2b made of an aluminum or stainless steel round tube at both ends of a small diameter round rod 2a made of aluminum, and the small diameter round rod 2a and the large diameter tube 2b are fixed by tightening the fixing screws 8. Therefore, by loosening the fixing screws 8 and sliding the small diameter round rod 2a and the large diameter tube 2b, the overall length (length in the left-right direction) of the upper shaft 2 can be adjusted (see Figure 3 In the following description, the front, rear, left, and right directions are defined based on the direction in which the herbicide spraying device 1 is viewed from one side of the operating handle 4.

[0042] The side frame 3 is composed of a rotating shaft 3a extending in the front-to-back direction, a longitudinal shaft 3b fixed to the front end of the rotating shaft 3a and extending in the right angle downward, a longitudinal shaft 3c fixed to the rear end of the rotating shaft 3a and extending in the right angle downward, a connecting member 3d fixed to the lower ends of the two longitudinal shafts 3b and 3c and extending in the front-to-back direction, and an operating shaft 3e integrally connected to the upper end side of the longitudinal shaft 3c. The rotating shaft 3a is made of an aluminum round bar, and the longitudinal shafts 3b and 3c are made of aluminum round tubes. Threaded holes are provided at the centers of both ends of the rotating shaft 3a, and bolts 9 are passed through the upper shaft 2 and tightened in the threaded holes so that the upper shaft 2 is rotatably connected thereto. In this way, an upper frame is formed by the paired upper shafts 2 and the paired rotating shafts 3a to form a rectangular upper frame in a plan view, and this upper frame is a skeleton structure with a constant shape.

[0043] The connecting member 3d is made of an aluminum plate, and its two ends are protrusions that protrude further in the front-rear direction than the rotating shaft 3a. The protrusions of the connecting member 3d are respectively installed with wheels 6 for traveling, and the herbicide spraying device 1 includes four wheels 6 in the front, back, left and right. Then, the front end of each protrusion of the paired connecting members 3d is bent into an arc shape of about 90 degrees toward the side where the other connecting member 3d is located, that is, toward the inside to form a protective part 3f. For example, when the herbicide spraying device 1 is moved forward, each protective part 3f has the function of preventing crops from entering between the paired connecting members 3d, that is, the herbicide spraying area, and preventing crops from being rolled into the wheels 6.

[0044] In addition, the connecting member 3d is mounted with a cover auxiliary plate 10 using a fixing screw 11, and the gap between the connecting member 3d and the soil is blocked by the cover auxiliary plate 10. The cover auxiliary plate 10 is formed with a slit 10a extending in the vertical direction, and the fixing screw 11 is screwed onto the connecting member 3d through the slit 10a to adjust the mounting position of the cover auxiliary plate 10 in the vertical direction.

[0045] An operating shaft 3e is integrally welded and fixed to the upper end of the longitudinal axis 3c at the rear end of the side frame 3. The operating shaft 3e is a straight continuous shape along the axial direction of the longitudinal axis 3c. The operating shaft 3e is made of an aluminum round tube or square tube with the same diameter as the longitudinal axis 3c.

[0046] The operating handle 4 has an integrated L-shaped operating portion 4b inserted into the upper end side of the operating shaft 3e, and a grip portion 4c installed at the base end of the operating portion 4b. The operating portion 4b is made of an aluminum round bar or square bar with a diameter smaller than that of the operating shaft 3e. After the operating portion 4b is inserted into the operating shaft 3e, it is fixed with a fixing screw 12. By loosening the fixing screw 12 and sliding the operating portion 4b, the height position of the operating handle 4 can be adjusted (see Figure 4 ).

[0047] A fan-shaped bracket 13 is fixed to both ends of the upper shaft 2 on the rear side, and a guide hole 13a is formed in the bracket 13. The guide hole 13a is a circular arc continuous slit centered on the bolt 9 of the rotation fulcrum of the side frame 3 and the operating handle 4. The operating handle 4 is detachably fixed to the bracket 13 by tightening the fixing screw 14 inserted into the guide hole 13a on the operating shaft 3e.

[0048] Here, by turning the operating handle 4 while the fixing screw 14 is loosened and not removed from the operating shaft 3e, the opening and closing angle θ between the side frame 3 integrated with the operating handle 4 can be adjusted to a specific angle. Figure 2As shown by the two-dot chain line in , when the operator operates the operating parts 4b of the two operating handles 4 in the direction of approaching each other, the side frame 3 will rotate, and with this rotation, the fixing screw 14 installed on the operating shaft 3e will move inward in the guide hole 13a, and the opening and closing angle θ between the two side frames 3 will gradually increase. Then, when the fixing screw 14 contacts the inner end of the guide hole 13a, the operating part 4b can no longer be operated to rotate in the approaching direction, so this position is determined as the maximum expansion angle of the two side frames 3. Conversely, when the operator operates the operating parts 4b of the two operating handles 4 in the direction of separating from each other, the side frame 3 will rotate, and with this rotation, the fixing screw 14 installed on the operating shaft 3e will move outward in the guide hole 13a, and the opening and closing angle θ between the two side frames 3 will gradually decrease. Next, when the fixing screw 14 contacts the outer end of the guide hole 13 a , the operating portion 4 b cannot be rotated in the separation direction any further, and thus this position is defined as the minimum expansion angle of the two side frames 3 .

[0049] For example, two nozzles 5 are installed on the paired upper shafts 2 parallel to the ground, and hoses 15 are connected to each nozzle 5. These hoses 15 meet at the center of the upper shaft 2 on the rear side, and a liquid tank (not shown) containing herbicides is connected to the front end of the hose 15 led out from the upper shaft 2. In addition, the number of nozzles 5 installed can be adjusted as needed, for example, only one nozzle 5 can be installed.

[0050] like Figure 5 As shown, the nozzle 5 is mounted on the front end of the support cylinder 16 protruding forward or downward from the upper shaft 2 on the rear side. The rear end of the support cylinder 16 contacts the outer peripheral surface of the upper shaft 2 and is supported by the upper shaft 2 through the elastic force of the fine wire spring 17. By loosening the fine wire spring 17, the support cylinder 16 can be moved laterally along the upper shaft 2, and the support cylinder 16 can also be rotated around the axis of the upper shaft 2, and the support cylinder 16 can also be rotated around its own axis. The nozzle part of each nozzle 5 can also be rotated up and down, and the spray direction of the nozzle 5 mounted on the support cylinder 16 can be freely adjusted.

[0051] The cover sheet 7 is mounted on the upper shaft 2 and the side frame 3, and covers the five surfaces of the box-shaped frame body composed of the paired upper shaft 2 and the two side frames 3, except for the bottom surface. That is, the cover sheet 7 covers the left and right side areas where the paired side frames 3 are arranged, the front area surrounded by the upper shaft 2 on the front side and the paired longitudinal shafts 3b, the rear area surrounded by the upper shaft 2 on the rear side and the paired longitudinal shafts 3c, and the upper area surrounded by the paired upper shaft 2 and the paired rotating shafts 3a. Here, since the front area surrounded by the upper shaft 2 on the front side and the paired longitudinal shafts 3b and the rear area surrounded by the upper shaft 2 on the rear side and the paired longitudinal shafts 3c are areas whose areas change with the opening and closing actions of the two side frames 3, the size of the cover sheet 7 covering the front area and the rear area needs to have a space sufficient to absorb the area change.

[0052] The cover sheet 7 is obtained by cutting a transparent plastic sheet into a specific size, and is fixed at any position of the upper shaft 2 and the side frame 3 using a plurality of fasteners 18. Figure 6 and Figure 7 As shown, the fastener 18 is composed of a plastic cylindrical body 18a with an open side and a wire spring 18b mounted on the cylindrical body 18a, and can be attached and detached relative to the upper shaft 2 and the side frame 3 made of round pipes. Therefore, after covering the upper shaft 2 and the side frame 3 with the cover sheet 7, the fastener 18 can be simply and reliably fixed by inserting the upper shaft 2 and the side frame 3 from the outside. In addition, the cover sheet 7 and the fastener 18 are agricultural materials used in agricultural plastic greenhouses, the cover sheet 7 is an agricultural plastic film used to cover the agricultural plastic greenhouse, and the fastener 18 is a tool called a pipe clamp (packer) for fixing the agricultural plastic film to the pillars of the agricultural plastic greenhouse.

[0053] Next, regarding the method of using the herbicide spraying device 1 of this embodiment, refer to Figure 8 Provide explanation.

[0054] Figure 8 In the figure, symbol P represents crops (such as green onions, etc.) planted in the field, and the herbicide spraying device 1 of this embodiment example is used to spray herbicides on the soil surface between the crops P planted in rows, for example.

[0055] The herbicide spraying device 1 is a device in which the length of the upper shaft 2 is pre-adjusted to be narrower than the width dimension W between the crops P, and then the distance between the left and right wheels 6 is adjusted to be consistent with the width dimension W between the crops P, and then the device is placed on the soil between the crops P. At this time, the opening and closing angle θ between the side frames 3 is adjusted in accordance with the growth degree of the crops P. Specifically, when the crops P grow larger, the inclination angle of the side frames 3 relative to the soil surface increases, and the lower end of the covering auxiliary plate 10 is extended to the vicinity of the root of the crop P. Relatively speaking, when the crops P are small, the lower end of the covering auxiliary plate 10 can be extended to the vicinity of the root of the crop without increasing the inclination angle of the side frames 3 relative to the soil surface too much, so the inclination angle of the side frames 3 can be adjusted with priority given to the convenience of the weeding operation.

[0056] At this time, although the fixing screw 14 is tightened to fix the posture of the operating handle 4, in order to freely adjust the opening and closing angle θ between the two side frames 3 during the travel, the fixing screw 14 is loosened to allow the operating handle 4 to rotate freely. In addition, even if the posture of the operating handle 4 is fixed, the fixing state of the operating handle 4 can be released by loosening the fixing screw 14, so that the opening and closing angle θ between the side frames 3 can be easily adjusted even during the herbicide spraying operation.

[0057] Then, when the herbicide spraying operation starts, the liquid medicine tank containing the herbicide is connected to the front end of the hose 15, and the operator carries the power sprayer or the manual sprayer equipped with the liquid medicine tank on his back, and while operating the pump (not shown) to spray the herbicide from the nozzle 5, he holds the operating handle 4 and moves the herbicide spraying device 1 along the long side direction between the crops P. At this time, since the box-shaped frame body is provided with the covering sheets 7 on all five surfaces except the bottom surface in a manner of surrounding the nozzle 5, not only the covering sheets 7 of the two side frames 3 can prevent the herbicide sprayed on the crops P from scattering, but also the herbicide affected by the wind will not exceed the covering sheets 7 from the front, back and top of the frame body and scatter to the surroundings in a windy working environment, and the herbicide can be effectively prevented from adhering to the crops P or the operator.

[0058] Furthermore, a cover auxiliary plate 10 is installed on the connection member 3d of the two side frames 3. By adjusting the cover auxiliary plate 10 up and down, the gap between the connection member 3d and the soil can be blocked. Therefore, the herbicide can be sprayed on the soil near the root of each crop P. At the same time, the herbicide shielding effect on the crop P is further improved by the cover sheet 7 and the cover auxiliary plate 10 installed on the two side frames 3.

[0059] Here, the rows of crops P sprayed with herbicides do not all extend linearly with a certain width. In most cases, the width dimension W between the rows of crops P along the moving direction of the herbicide spraying device 1 will change. Therefore, when the fixing screws 14 are tightened to fix the opening and closing angle θ between the side frames 3, the fixing screws 14 are loosened, and the two operating handles 4 are operated to rotate in the approaching / separating direction, so that the distance between the left and right wheels 6 can be made consistent with the width dimension W between the crops P. In contrast, when the fixing screws 14 are not tightened and the opening and closing angle θ between the side frames 3 can be freely adjusted, each operating handle 4 can be operated without loosening the fixing screws 14, so that the distance between the left and right wheels 6 can be made consistent with the width dimension W between the crops P.

[0060] For example, when the width dimension W between the crops P increases, the operator operates the two operating handles 4 to rotate in the direction of approaching each other, and the two side frames 3 rotate outwardly with the bolt 9 as the center in conjunction with the two side frames 3, so that the opening and closing angle θ between the two side frames 3 increases in accordance with the width dimension W between the rows of the crops P. On the contrary, when the width dimension W between the crops P decreases, the operator operates the two operating handles 4 to rotate in the direction of separating from each other, and the two side frames 3 rotate inwardly with the bolt 9 as the center in conjunction with the two side frames 3, so that the opening and closing angle θ between the two side frames 3 decreases in accordance with the width dimension W between the crops P.

[0061] Then, as described above, the opening and closing angle adjustment between the two side frames 3 is performed. Even when the fixing screws 14 are tightened to fix the opening and closing angle θ between the side frames 3, the operator can stop on the spot during the herbicide spraying operation, loosen the fixing screws 14, operate the two operating handles 4 to make the spacing between the wheels 6 consistent with the width W between the crops P, and then tighten the fixing screws 14 again to continue the work of spraying herbicides with the herbicide spraying device 1. Furthermore, when the opening and closing angle θ between the side frames 3 can be freely adjusted without tightening the fixing screws 14, even if the movement of the herbicide spraying device 1 or the spraying of the herbicide is not specifically suspended, in short, the herbicide spraying operation, the operator can still hold the operating handles 4 to make the herbicide spraying device 1 move, and adjust the opening and closing angle θ between the side frames 3 while continuing the herbicide spraying operation.

[0062] In addition, when the operator holds the operating handle 4 to move the herbicide spraying device 1, because the wheel 6 is installed on the connecting member 3d of the two side frames 3 and protrudes forward more than the rotating shaft 3a, the operator can visually use the wheel 6 as a positioning mark to adjust the opening and closing angle θ between the two side frames 3 so that the spacing between the wheels 6 is consistent with the width dimension W between the crops P, while moving the herbicide spraying device 1.

[0063] In particular, when the crop P grows smaller, by shifting each nozzle 5 outward and directing the spraying direction of the nozzle 5 inward, the herbicide can be sprayed on the inclined surface M1 inside the trench M where the crop P is planted. In contrast, since the inclined surface M1 of the trench M collapses as the crop P grows and gradually becomes a gentle slope, when the crop P grows larger, the herbicide can be sprayed on the inclined surface M1 inside the trench M without directing the spraying direction of each nozzle 5 further outward.

[0064] In addition, the direction of travel of the herbicide spraying device 1 can also be opposite to the above, and the herbicide spraying device 1 can be turned away from the wheel 6 side and moved toward the wheel 6 side. Figure 1 In this case, since the nozzle 5 sprays the herbicide behind the operator's traveling direction, the operator has the advantage that the operation can be completed without walking on the soil sprayed with the herbicide.

[0065] As described above, with the herbicide spraying device 1 of the present embodiment, the operator holds the pair of operating handles 4 and sprays the herbicide from the nozzles 5 while moving the wheels 6 mounted on the left and right side frames 3 along the soil between the crops P, thereby protecting the crops P from the herbicide sprayed from the nozzles 5 and spraying the herbicide only between the soil portions surrounded by the side side frames 3. Then, if the width dimension W between the crops P on which the herbicide spraying device 1 moves changes, when the operator operates the two operating handles 4 in the approaching / separating directions, the side side frames 3 rotate in conjunction with the bolts 9 of the connection portions between the side side frames 3 and the upper shaft 2, so that the opening and closing angle θ between the side side frames 3 can be easily adjusted according to the width dimension W between the crops P. In addition, since not only the two side frames 3 but also the surroundings of the nozzle 5 are covered by the covering sheet 7, even in a windy working environment, the herbicide affected by the wind will no longer fly around from the front, back or top of the herbicide spraying device 1, and the herbicide can be effectively prevented from adhering to the crop P or the operator.

[0066] Furthermore, since the length of the paired upper shafts 2 is adjustable, even if the width dimension W between the crops P to be worked on changes depending on the type of crops P to be planted, the width dimension of the entire herbicide spraying device 1 can be easily changed. At this time, since a flexible agricultural plastic film is used as the cover sheet 7, as long as the cover sheet 7 with a certain size is installed on the upper shaft 2, the length of the upper shaft 2 can be adjusted without replacing the cover sheet 7.

[0067] Furthermore, a guide hole 13a extending in an arc shape with the bolt 9 serving as a rotation fulcrum of the operating handle 4 as the center is formed on the bracket 13 fixed to both ends of the upper shaft 2 on the rear side, and the operating handle 4 can be fixed to the bracket 13 by tightening the fixing screw 14 inserted into the guide hole 13a on the bracket 13. With such a structure, since the opening and closing angle θ of the paired side frames 3 is limited within a specific range, it is possible to reliably prevent the side frames 3 from falling down due to being too tightly closed inwardly, or from being too open outwardly to damage the crops P.

[0068] Furthermore, since the guide hole 13a is a continuous arc-shaped slit, the device 1 can move forward not only while the fixing screws 14 are tightened to fix the opening and closing angle θ between the two side frames 3, but also when the fixing screws 14 are loosened, the operator can easily adjust the opening and closing angle θ between the two side frames 3 while moving the herbicide spraying device 1.

[0069] Furthermore, even in the case where the growth degree of crop P is significant, the length of the upper shaft 2 can be shortened, and the inclination angle of the side frame 3 relative to the soil surface can be increased. By adjusting the lower end of the covering auxiliary plate 10 to contact the soil surface, the lower end side of the covering auxiliary plate 10 can be inserted to a position close to the root of the crop P without contacting the crop P (buffering), and the herbicide spraying device 1 can be used to spray the herbicide. Therefore, the herbicide spraying operation can be accurately performed according to the growth degree of crop P.

[0070] In addition, the side frame 3 is a skeleton structure composed of a rotating shaft 3a rotatably connected to the upper shaft 2, a longitudinal shaft 3b fixed to the front end of the rotating shaft 3a and extending at right angles to the downward direction, a longitudinal shaft 3c fixed to the rear end of the rotating shaft 3a and extending at right angles to the downward direction, a connecting member 3d fixed to the lower ends of these two longitudinal shafts 3b and 3c and extending in the front-to-back direction, and an operating shaft 3e integrated with the upper end side of the longitudinal shaft 3c. Since wheels 6 are respectively installed on the connecting members 3d of the left and right side frames 3, the two side frames 3 can be smoothly moved using each wheel 6.

[0071] Furthermore, the connecting member 3d of the side frame 3 has a protrusion that protrudes further in the front-rear direction than the rotation axis 3a, and since the wheels 6 are mounted on each protrusion, the operator can visually see the wheels 6 disposed further forward than the rotation axis 3a, and visually see the wheels 6 as a mark for positioning. Thus, the herbicide spraying device 1 can be easily moved along the crops P while adjusting the spacing between the wheels 6 to match the width dimension W between the crops P.

[0072] Furthermore, since the two side frames 3 are equipped with covering auxiliary plates 10 that cover the gap between the connecting member 3d and the soil, the herbicide shielding effect of the two side frames 3 on the crops is improved. In addition, since the installation height of the covering auxiliary plates 10 is adjustable, the installation height of the covering auxiliary plates 10 can be changed according to the inclination angle of the two side frames 3, so that the gap between the covering auxiliary plates 10 and the soil can be reduced or eliminated, and the herbicide can be accurately sprayed to a position close to the root of the crop P.

[0073] In addition, the rotating shaft 3a and the longitudinal shafts 3b, 3c of the two side frames 3 and the paired upper shafts 2 are all made of round bars or tubes whose outer diameters match the pillars of the agricultural plastic greenhouse and can be installed with fasteners 18, and an agricultural plastic film cut into a specific size is used as the covering sheet 7, so that the agricultural plastic film can be fixed at any position of the upper shaft 2 and the side frame 3 using multiple fasteners 18. Then, since the covering sheet (agricultural plastic film) 7 and the fasteners (pipe clamps) 18 are both agricultural materials generally used for agricultural plastic greenhouses, the fasteners 18 can be installed and removed without using tools.

[0074] In particular, since the operation of these covering sheets 7 and fasteners 18 is easy for farmers who often come into contact with such agricultural materials, the covering sheets 7 can be easily and simply repeated using readily available agricultural materials in the field (on-site) where herbicides are sprayed, the operation of posting, removing and re-posting the covering sheets 7 can be repeated.

[0075] In addition, the above-mentioned embodiment is an example for explaining the present invention, and various other modified examples can be adopted. For example, in the above-mentioned embodiment, although it is described as a device for spraying herbicides on the soil surface between crops P such as onions, it can also be used as a device for spraying liquid in the range of the length direction at a place where the width size is different in a certain width size.

[0076] Specifically, since the paired side frames 3 are each fixed to the upper shaft 2 at one point, the opening and closing angles of the paired side frames 3 can be different on the left and right sides, and the opening and closing angles can be set to be asymmetric on the left and right sides in accordance with the shape of the specific slope on which the herbicide is to be sprayed. Fig. 9 As shown, when spraying liquids such as herbicides or insect repellents on the surface of the ridge S dividing the paddy field U, the side frame on one side and the side frame on the other side can be opened and closed at different angles to spray the liquids such as herbicides or insect repellents on the ridge S until it is very close to the paddy field U. In addition, it can also be used to spray liquids such as herbicides between the ridges of the field, or spray liquids such as insect repellents and disinfectants on the passages of the cattle shed.

[0077] In addition, if Fig.10As shown, a lead-in piece 3g curved in an arc shape and having its front end protruding along the outer side surface of the connecting member 3d can be installed at the front end of each protective portion 3f of each connecting member 3d. The lead-in piece 3g can make, for example, the object to be sprayed with the herbicide (weeds, etc.) enter between the paired connecting members 3d, that is, within the area to be sprayed with the herbicide when the herbicide spraying device 1 moves forward. In short, the lead-in piece 3g has the function of effectively performing the weeding operation even when the weeds to be weeded grow to a certain extent.

[0078] Next, if Fig.11 As shown, by extending the base end side of each bringing-in piece 3g and bending it into a symmetrical arc shape, the weeds can be brought in between the paired connecting members 3d, that is, into the area where the herbicide is to be sprayed, more effectively, and the brought-in weeds can be prevented from being entangled on the wheel 6.

[0079] In addition, the structure of the covering sheet 7 can be a three-part structure in which the upper surface side area surrounded by the pair of upper shafts 2 and the pair of rotating shafts 3a, and the left and right side surface side areas where the pair of side frames 3 are arranged are covered with a single sheet, the front surface side area surrounded by the upper shaft 2 on the front side and the pair of longitudinal shafts 3b is covered with a single sheet, and the rear surface side area surrounded by the upper shaft 2 on the rear side and the pair of longitudinal shafts 3c is covered with a single sheet; or it can be a five-part structure in which the upper surface side area, left surface side area, right side area, front surface side area, and rear surface side area are each covered with a single sheet.

[0080] In addition, although the description has been made of the case where the rotating shaft 3a, the two longitudinal shafts 3b, 3c, the operating shaft 3e and the upper shaft 2 of the side frame 3 are made of aluminum round bars or round tubes, square tubes, stainless steel tubes other than aluminum tubes, iron tubes and resin tubes may be used instead of round tubes. In addition, the connecting member 3d may be made of square tubes or the like instead of plates.

[0081] In addition, although the covering sheet 7 is installed on the upper shaft 2 and the side frames 3 in order to cover the five surfaces except the bottom surface of the box-shaped frame body composed of the paired upper shafts 2 and the two side frames 3, the covering sheet 7 only needs to cover the two surfaces of the left and right side surface areas where the two side frames 3 are located. Although the shielding effect of the herbicide provided by the covering sheet 7 will be somewhat reduced, the covering sheet 7 can be omitted for the upper surface area surrounded by the paired upper shafts 2, and the front surface side area and the rear surface side area of ​​the frame body.

[0082] Furthermore, wheels 6 are installed at four positions of the front, rear, left and right sides of the two side frames 3. Although the four wheels 6 are used to move the herbicide spraying device 1, the number of wheels 6 is not limited to four, and one wheel 6 may be installed at the front or rear side of each side frame 3. Alternatively, the wheels 6 may be omitted, and the herbicide spraying device 1 may be moved in a manner that the two side frames 3 are in contact with the ground.

[0083] In addition, although protrusions are provided to allow the two ends of the connecting member 3d to protrude in the front-rear direction in order to enable visual observation of the wheel 6 and use it as a positioning mark, if the herbicide spraying device 1 is used for herbicide spraying operations in a small space such as an agricultural plastic greenhouse, the connecting member 3d can also be set to be slightly longer than the dimension between the longitudinal axes 3b and 3c, instead of having the two ends of the connecting member 3d protrude in the front-rear direction.

[0084] Description of Reference Numerals

[0085] 1Herbicide spraying device (liquid spraying device)

[0086] 2 Upper shaft

[0087] 2a Small diameter round rod

[0088] 2b Large diameter pipe

[0089] 3 side frame

[0090] 3a Rotation axis

[0091] 3b, 3c vertical axis

[0092] 3d connection components

[0093] 3e operating axis

[0094] 4 Operating handle

[0095] 4b Operation part

[0096] 4c grip

[0097] 5 Nozzles

[0098] 6 wheels

[0099] 7 Cover Sheets

[0100] 8 Fixing screws

[0101] 9 Bolts

[0102] 10 Cover auxiliary board

[0103] 10a Slit

[0104] 11 Fixing screws

[0105] 12 fixing screws

[0106] 13 Bracket

[0107] 13a Guide hole

[0108] 14 Fixing screws

[0109] 15 Hose

[0110] 16 Support tube

[0111] 17 wire fine spring

[0112] 18 Fasteners

[0113] 18a cylinder

[0114] 18b wire spring

Claims

1. A liquid spraying device, characterized in that: include: Pairs of upper shafts, spaced at specific intervals in the anterior-posterior direction and extending in the lateral direction; A pair of side frames, arranged on the left and right sides of the pair of upper shafts; a pair of operating handles for moving the pair of side frames; A nozzle is mounted on the upper shaft and sprays the liquid into the space surrounded by the two side frames; and a covering sheet, covering at least the pair of side frames, The side frame is integrally connected to the operating handle, and the side frame and the operating handle are rotatably supported on the upper shaft. By operating the paired operating handles in the approaching / separating direction with the rotation fulcrum of the upper shaft as the center, the opening / closing angle between the paired side frames can be variably adjusted.

2. The liquid spraying device according to claim 1, characterized in that: Further including: A cover sheet covers a front region surrounded by the upper shaft on the front side and the side frames, and a cover sheet covers a rear region surrounded by the upper shaft on the rear side and the side frames.

3. The liquid spraying device according to claim 2, characterized in that: The cover sheet further covers between the pair of upper shafts.

4. The liquid spraying device according to any one of claims 1 to 3, characterized in that: Further including: The angle fixing device can fix the opening and closing angle between the paired side frames at a specific angle.

5. The liquid spraying device according to claim 4, characterized in that: The angle fixing device comprises: A bracket is fixed to the upper shaft; a guide hole is formed in the bracket and extends in an arc shape with the rotation fulcrum as the center; and a fixing screw passes through the guide hole and fixes the operating handle to the bracket.

6. The liquid spraying device according to claim 5, characterized in that: The guide hole is a continuous arc-shaped slit.

7. The liquid spraying device according to claim 1, characterized in that: The side frame includes: a rotating shaft rotatably connected to the upper shaft; a pair of longitudinal shafts extending downward from both ends of the rotating shaft; and a connecting member connecting the lower ends of the pair of longitudinal shafts. The connecting member is mounted with a plurality of wheels.

8. The liquid spraying device according to claim 7, characterized in that: The connecting member has a protrusion that protrudes further in the front-rear direction than the rotating shaft. The wheel is mounted on the protruding portion.

9. The liquid spraying device according to claim 7, characterized in that: The paired side frames are provided with cover auxiliary plates that cover a gap generated between the surface on which the liquid is sprayed and the connection member.

10. The liquid spraying device according to claim 1, characterized in that: The covering sheet is an agricultural plastic film, The agricultural plastic film is fixed at any position on the upper shaft and the side frame using a plurality of fasteners.

Images