Liquid tank device

Abstract

To provide a liquid tank apparatus capable of suppressing a decrease in degree of freedom of design of a liquid tank.SOLUTION: A liquid tank apparatus comprises a liquid tank 2 which reserves a liquid injected from an injection port 22, a support 5 which is supported at the injection port 22, and arranged at least in part in an inside space S of the liquid tank 2, and a wave canceler 9 which is fitted to the support 5, and arranged in the inside space S, the support 5 and wave canceler 9 being formed as mutually different bodies, and fixed to each other by fixing means.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a liquid tank device. [Background technology]

[0002] The liquid tank device disclosed in Patent Document 1 includes a liquid tank that stores liquid, and a strainer attached to the inlet of the liquid tank. A plate-like body extending downward is provided below the strainer. The plate-like body is arranged so as to be immersed in the liquid stored in the liquid tank. Therefore, when waves occur in the liquid, the movement of the liquid can be restricted by the plate-like body (the so-called wave-dissipating effect). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-741 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the liquid tank device described above, when the water level in the liquid tank becomes lower than the lower end of the plate-like body, the plate-like body is no longer immersed in the liquid, and therefore the wave-damping effect of the plate-like body cannot be expected. On the other hand, if the lower end of the plate-like body in the strainer extends to a height position near the bottom of the liquid tank, the wave-damping effect of the plate-like body can be maintained even if the water level in the liquid tank drops. However, strainers are often used in common for different types of liquid tanks. Therefore, in order to bring the lower end of the plate-like body closer to the bottom of the liquid tank, it is necessary to design the liquid tank to match the strainer, which reduces the degree of freedom in designing the liquid tank.

[0005] An object of the present invention is to provide a liquid tank device that can suppress a decrease in the degree of freedom in designing the liquid tank. [Means for solving the problem]

[0006] The liquid tank device according to the present invention comprises a liquid tank (2) for storing liquid injected from an injection port (22), a support (5) supported by the injection port (22) and at least a portion of which is disposed in an inner space (S) of the liquid tank (2), and a wave-breaking body (9) attached to the support (5) and disposed in the inner space (S), the support (5) and the wave-breaking body (9) being formed as separate bodies from each other and fixed to each other by a fixing means (8).

[0007] According to such a liquid tank device (1), the wave-breaking body (9) attached to the support (5) can come into contact with the stored liquid in the inner space (S) of the liquid tank (2). Therefore, when waves are generated in the liquid due to the swaying of the liquid tank (2), the wave-breaking body (9) provides resistance to the flow of the liquid, suppressing the flow of the liquid. Since the support (5) and the wave-breaking body (9) are formed separately from each other, the wave-breaking body (9) designed according to the shape of the liquid tank (2) can be attached to the support (5). In other words, since the wave-breaking body (9) can be selected according to the shape of the liquid tank (2), a decrease in the degree of freedom in designing the liquid tank (2) can be suppressed.

[0008] The support (5) may be a strainer (5) having a filtering portion (7) for filtering the liquid injected from the injection port (22). In this configuration, the wave dissipating body (9) is supported by the strainer, so there is no need to provide a dedicated member for supporting the wave dissipating body (9).

[0009] The lower end of the wave dissipating body (9) has a shape that conforms to the bottom of the liquid tank (2), and the wave dissipating body (9) may be supported by the support body (5) so that the lower end conforms to the bottom. By arranging the lower end of the plate-shaped part so as to conform to the bottom of the liquid tank as in this configuration, the wave dissipating effect can be maintained for a long time.

[0010] The wave dissipating body (9) may be attached to the support body (5) by fitting the support body (5) and the wave dissipating body (9) to each other. In this configuration, no fastening members such as screws are required to fix the support body (5) and the wave dissipating body (9) to each other.

[0011] The fixing means (8) may be upwardly concave grooves (81, 83) formed in the support (5), and the wave dissipating body (9) may be attached to the support (5) by fitting into the grooves (81, 83). In this configuration, no fastening member such as a screw is required to fix the support (5) and the wave dissipating body (9) to each other. Effect of the Invention

[0012] According to the present invention, it is possible to provide a liquid tank device that can suppress the movement of liquid in the vertical direction. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view showing an example of a liquid tank device. [Diagram 2] FIG. 2 is a cross-sectional view showing the liquid tank device taken along the vertical direction. [Diagram 3] FIG. 2 is a perspective view showing a strainer and a wave dissipating body. [Figure 4] FIG. 4 is a bottom view showing the strainer and the wave dissipating body. [Diagram 5] FIG. 4 is a cross-sectional view showing a strainer and a wave dissipating body. [Figure 6] FIG. 2 is a cross-sectional view showing a partially enlarged view of the strainer and the wave dissipating body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience, substantially the same elements are designated by the same reference numerals, and the description thereof may be omitted.

[0015] FIG. 1 is a perspective view showing the liquid tank device 1. FIG. 2 is a cross-sectional view showing the liquid tank device 1. FIG. 2 shows the liquid tank device 1 cut along the YZ plane at a position shifted in the X direction from the injection port 22. In this embodiment, the liquid tank device 1 can be applied to a so-called backpack-type power sprayer for spraying liquid such as pesticides. For example, the liquid tank device 1 may be provided with a backpack strap for an operator to carry the liquid tank device 1 on his / her back. In the following, the liquid tank device 1 applied to a backpack-type power sprayer will be described, and the front-rear direction will be defined as the operator side (the side indicated by the Y-direction arrow in the drawing) when the operator carries the power sprayer on his / her back. As a result, the horizontal direction (X direction) that intersects (orthogonal) with the front-rear direction is defined as the left-right direction, and the direction that intersects (orthogonal) with the front-rear direction and the horizontal direction is defined as the up-down direction (Z direction).

[0016] The liquid tank device 1 includes a liquid tank 2, a strainer 5, and a wave breaker 9. The liquid tank 2 can store liquid such as a chemical solution in an inner space S. A recess 21 is formed in a lower portion (bottom) 25 of the liquid tank 2, which is shaped to rise toward the inside of the liquid tank 2. A pump and a motor constituting a power source can be arranged in this recess 21 so as to be fixed to the liquid tank 2. When the liquid tank 2 is applied to a backpack type power sprayer, the chemical solution is sucked from the liquid tank 2 by driving the pump and is pumped to a spray hose, and the chemical solution can be sprayed from a spray nozzle. Note that in the illustrated example, the pump, motor, spray hose, spray nozzle, etc. are not depicted.

[0017] The liquid tank 2 is formed, for example, from a translucent synthetic resin, and the amount of liquid stored in the internal space S can be visually confirmed from the outside. As an example, the liquid tank 2 can be formed by blow molding. An injection port 22 for injecting liquid into the internal space S of the liquid tank 2 is formed in the upper part of the liquid tank 2. A tank lid (not shown) can be detachably attached to the outer circumferential surface of a cylindrical portion 22a that forms the injection port 22, for example, by screws or the like.

[0018] A support portion 23 is formed at the center of the liquid tank 2 in the up-down direction. The support portion 23 is a portion on which a person wearing work clothes places his or her hand when supporting the liquid tank 2. The support portion 23 in the illustrated example is formed on the outer peripheral surface of the liquid tank 2. The support portion 23 has a shape that is recessed toward the inside of the liquid tank 2.

[0019] Fig. 3 is a perspective view showing the strainer 5 and the wave dissipating body 9. Fig. 4 is a bottom view showing the strainer 5 and the wave dissipating body 9. Fig. 5 is a cross-sectional view showing the strainer 5 and the wave dissipating body 9. Figs. 3 to 5 show a state in which the wave dissipating body 9 is attached to the strainer 5. The strainer 5 comprises a substantially cylindrical tubular part 6 inserted into the injection port 22, a filtering part 7 provided at the lower end of the tubular part 6, and a fixed part (fixing means) 8 provided at the lower end of the filtering part. The tubular part 6, the filtering part 7 and the fixed part 8 are integrally molded, for example, from a synthetic resin having a predetermined elasticity.

[0020] The cylindrical portion 6 is divided into three parts, an upper part 61, an intermediate part 63, and a lower part 65, from the upper side along its axial direction. The outer diameter of the upper part 61 is larger than that of the intermediate part 63, and the outer diameter of the lower part 65 is smaller than that of the intermediate part 63. In this embodiment, for example, an annular protrusion (not shown) protruding radially inward is provided on the inner circumference of the above-mentioned cylindrical part 22a, and the cylindrical portion 6 is supported by the protrusion. As an example, the outer diameter of the intermediate part 63 is smaller than the diameter of a circle defined by the inner edge of the protrusion formed on the injection port 22, and the outer diameter of the upper part 61 is smaller than the outer diameter of the open end of the injection port 22 and larger than the diameter of the circle. Therefore, when the cylindrical portion 6 is inserted into the injection port 22 from the lower part 65 side, the step 64 between the intermediate part 63 and the upper part 61 is placed on the protrusion, and the cylindrical portion 6 is held in the injection port 22. In this state, the upper end of the cylindrical portion 6 is open, so that liquid can be poured into the cylindrical portion 6 from there, and foreign matter contained in the liquid can be filtered out by the filtering portion 7.

[0021] The filtering portion 7 is a portion for removing and filtering foreign matter from the liquid that has passed through the cylindrical portion 6. The filtering portion 7 has a plurality of bone members 71 (six in the illustrated embodiment) that are provided so as to equally divide the lower end of the cylindrical portion 6 (i.e., the lower end opening of the lower portion 65) in the circumferential direction. The bone members 71 are connected to each other at the position of the center C of the filtering portion 7. Furthermore, each bone member 71 is connected to the inner circumference of the lower portion 65. That is, these bone members 71 extend radially from the center of the filtering portion 7 to the inner circumference of the lower portion 65. The filtering portion 7 is divided into a plurality of fan-shaped openings 73 by the bone members 71. The fan-shaped openings 73 are provided with a mesh (not shown) that captures foreign matter contained in the liquid poured into the liquid tank 2.

[0022] The fixing portion 8 functions as a fixing means for fixing the strainer 5 and the wave dissipating body 9 to each other. In this embodiment, the fixing portion 8 includes a pair of groove portions 81 and a pair of groove portions 83 each having an upward concave shape. In the illustrated example, the strainer 5 and the wave dissipating body 9 are fixed to each other by the groove portion 81, but the strainer 5 and the wave dissipating body 9 may also be fixed to each other by the groove portion 83. In one example, the extending direction of the groove portion 81 and the extending direction of the groove portion 83 intersect (are perpendicular to) each other when viewed from the top-bottom direction.

[0023] The pair of grooves 81 extend along the front-rear direction (Y direction) and are spaced apart from each other with the center C of the filtering portion 7 in between. As an example, the grooves 81 are provided linearly so as to connect the connection positions of the lower parts 65 of adjacent bone members 71. The pair of grooves 83 extend along the left-right direction (X direction) and are spaced apart from each other with the center C of the filtering portion 7 in between. As an example, the grooves 83 are provided linearly so as to connect the inner peripheries of the lower parts 65 that define adjacent sector-shaped openings 73 in between.

[0024] The wave-breaking body 9 provides resistance to the liquid stored in the liquid tank 2. The wave-breaking body 9 in this embodiment has a pair of plate-like bodies 91 attached to the strainer 5. The plate-like bodies 91 are, for example, substantially rectangular plates, and provide resistance to the liquid moving in a direction intersecting the plate surface while immersed in the liquid stored in the liquid tank 2. The plate-like bodies 91 are supported by the strainer 5 by fixing their upper ends 91c to the fixing parts 8. As shown in FIG. 2, in one example, a recess 21 is provided in the lower part 25 of the liquid tank 2, and the bottom surface of the liquid tank 2 is raised toward the inside by this recess 21. In this embodiment, the lower end 91b of the plate-like bodies 91 has a shape that follows the lower part (bottom) 25 of the liquid tank 2. That is, an inclined part 91a is formed in the lower end 91b of the plate-like bodies 91 so that the plate-like bodies 91 do not interfere with the bottom surface of the liquid tank 2. The inclined portion 91a in one example extends on the lower rear side of the plate-like body 91 along a direction intersecting the Y direction and the Z direction.

[0025] The width (dimension in the Y direction) of plate-like body 91 may be approximately the same length as a straight line (line segment) that passes through the position where groove portion 81 is formed and inscribes itself in the outer periphery of strainer 5 in a plan view. In this case, strainer 5 can be easily attached to inlet 22 of liquid tank 2 with plate-like body 91 fixed to groove portion 81.

[0026] The height (vertical dimension) of plate-like body 91 is such that at least a portion of plate-like body 91 can be immersed in a certain amount of liquid in liquid tank 2 when strainer 5 is attached to injection port 22. In the illustrated example, plate-like body 91 extends to the vicinity of lower portion 25 of liquid tank 2.

[0027] Next, the fixing portion between the strainer 5 and the wave dissipating body 9 will be further described. FIG. 6 is a cross-sectional view showing a part of the strainer 5 and the wave dissipating body 9 in an enlarged manner. FIG. 6 shows the strainer 5 and the plate-like body 91 in a separated state in an enlarged manner for the part indicated by the symbol A in FIG. 5. As shown in FIG. 6, the groove portion 81 in this embodiment has a pair of side wall portions 81a protruding downward. The pair of side wall portions 81a extend parallel to each other with a distance of width W1 between them. The pair of side wall portions 81a have inner edge portions 81b at the lower ends formed to be inclined. Therefore, in the groove formed by the pair of side wall portions 81a, the width of the opening side is formed wider than the width W1 of the back side.

[0028] In this embodiment, an upper end 91c of the plate-like body 91 is pressed (slidingly pressed) between a pair of side walls 81a of the groove 81, so that the plate-like body 91 is fitted (fixed) to the groove 81. That is, the upper end 91c of the plate-like body 91 is sandwiched in the groove 81 due to the elasticity of the resin forming the groove 81. In one example, the plate-like body 91 is aligned by contacting an edge portion of the upper end 91c of the plate-like body 91 with an edge portion 81b of the pair of side walls 81a, and in this state, the plate-like body 91 is pressed into the back side of the groove 81.

[0029] When using the liquid tank apparatus 1 described above, a predetermined amount of concentrated liquid medicine is poured into the inlet 22 before attaching the strainer 5. After the concentrated liquid medicine has been poured into the inlet 22 of the liquid tank 2, the strainer 5 is attached to the inlet 22 of the liquid tank 2. At this time, the pair of plate-like bodies 91 is attached to the strainer 5. Therefore, when the strainer 5 is attached to the inlet 22, the plate-like bodies 91 extend along the YZ plane within the inner space S of the liquid tank 2.

[0030] Once the strainer 5 is attached to the inlet 22 in this way, water for diluting the concentrated chemical solution to a predetermined concentration is poured from the open end of the strainer 5. The amount of water to be poured is confirmed by viewing the liquid level from the outside of the translucent liquid tank 2 and comparing it with the scale engraved on the liquid tank 2. For example, water is poured so that at least a part (lower side) of the plate-like body 91 is immersed in the water. In this embodiment, the lower end 91b of the plate-like body 91 extends to the vicinity of the bottom surface of the liquid tank, so that even if only a small amount of water is poured, a part of the plate-like body 91 is immersed in the water. Foreign matter contained in the water is captured by the filtering portion 7 of the strainer 5, and the intrusion of foreign matter into the liquid tank 2 is prevented. After pouring water into the liquid tank 2, a tank lid is attached to the inlet 22. This allows the operator to start work using, for example, a backpack-type power sprayer.

[0031] When performing such work, since the backpack power sprayer is used by being carried on the worker's back, the liquid tank 2 tends to swing irregularly as the worker walks, which tends to cause rippling in the liquid in the liquid tank 2. However, according to the liquid tank device 1, the plate-like body 91 is immersed in the liquid stored in the inner space S of the liquid tank 2. Therefore, the plate-like body 91 provides resistance to the horizontal flow of the liquid, suppressing the flow of the liquid.

[0032] In addition, in the liquid tank device 1, since the strainer 5 and the wave dissipating body 9 are formed separately from each other, the wave dissipating body 9 designed according to the shape of the liquid tank 2 can be attached to the strainer 5. In other words, since the wave dissipating body 9 can be selected according to the shape of the liquid tank 2, a decrease in the degree of freedom in designing the liquid tank 2 can be suppressed.

[0033] In addition, in this embodiment, since the wave dissipating body 9 is supported by the strainer 5, there is no need to provide a dedicated member for supporting the wave dissipating body 9. This reduces the number of parts of the liquid tank device 1, and also simplifies the manufacture of the liquid tank device 1.

[0034] Furthermore, the lower end 91b of the plate-like body 91 has a shape that conforms to the bottom of the liquid tank 2, and the plate-like body 91 is supported by the strainer 5 so that the lower end 91b conforms to the bottom. With this configuration, the lower end 91b of the plate-like body 91 is disposed so as to conform to the bottom of the liquid tank 2, thereby making it possible to maintain the wave-dissipating effect for a long period of time.

[0035] Furthermore, the plate-like body 91 is attached to the strainer 5 by fitting the strainer 5 and the plate-like body 91 together. In this configuration, no fastening members such as screws are required to fix the strainer 5 and the plate-like body 91 together. This reduces the number of parts of the liquid tank device 1, and also simplifies the manufacture of the liquid tank device 1.

[0036] In particular, the plate-like body 91 is attached to the strainer 5 by fitting into the groove portion 81. In this configuration, the upper end 91c of the plate-like body 91 is clamped by the groove portion 81 over a relatively wide range, so that the plate-like body 91 can be firmly fixed to the strainer 5.

[0037] Although one embodiment has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment.

[0038] For example, the grooves 81, 83 formed in the strainer 5 are exemplified as a fixing means for fixing the strainer 5 and the plate-like body 91, but the fixing means is not limited to this. For example, the plate-like body 91 may be fixed to the strainer 5 by a fastening means such as a screw. In addition, the strainer 5 and the plate-like body 91 may be fixed to each other by, for example, fitting a cylindrical recess formed on one of them into a cylindrical protrusion formed on the other.

[0039] In addition, in the above embodiment, an example is described in which the liquid tank device is applied to a backpack power sprayer, but the liquid tank device is applicable to all backpack type work machines that are equipped with a liquid tank, and can also be applied to towed types, crawler types, and vehicles that run on front and rear wheels and have a liquid tank.

[0040] In addition, a strainer has been exemplified as a support for supporting the plate-like body 91 in the inner space of the liquid tank 2, but the support does not necessarily have to be a strainer and may be a dedicated member for supporting the plate-like body 91. [Explanation of symbols]

[0041] 1...liquid tank device, 2...liquid tank, 5...strainer (support), 8...fixed part (fixing means), 9...wave breaker, 22...inlet, 81, 83...groove portion, S...inner space.

Claims

1. a liquid tank (2) for storing liquid injected through an inlet (22); a support (5) supported by the inlet (22) and at least a portion of which is disposed in the inner space (S) of the liquid tank (2); A wave dissipating body (9) attached to the support (5) and disposed in the inner space (S), The support body (5) and the wave-breaking body (9) are formed separately from each other, The support (5) has a cylindrical portion (6) supported by the injection port (22) and a fixing portion formed integrally with the cylindrical portion (6) and provided at a lower end of the cylindrical portion (6), The wave dissipating body (9) has a plate-shaped portion (91) having a plate shape, The fixing portions are provided in pairs at positions spaced apart from each other across the center of the support (5) in a plan view, The plate-shaped portion (91) is fitted into each of the pair of fixed portions, thereby fixing the support body (5) and the wave-breaking body (9) to each other.

2. 2. The liquid tank device according to claim 1, wherein the support (5) is a strainer (5) having a filtering portion (7) for filtering the liquid injected from the injection port (22).

3. The lower end of the wave breaker (9) has a shape that conforms to the bottom of the liquid tank (2), 3. The liquid tank device according to claim 1 or 2, wherein the wave breaker (9) is supported by the support (5) so that the lower end is along the bottom.

4. The fixed portion of the support (5) has an upwardly concave groove, The liquid tank device according to any one of claims 1 to 3, wherein the wave breaker (9) is attached to the support (5) by fitting into the groove portion.

5. A liquid tank device as described in any one of claims 1 to 4, wherein the support (5) further has a pair of other fixed portions extending in a direction intersecting the extension direction of the fixed portions, at positions spaced apart from each other on either side of the center of the support (5) in a planar view.

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