JP3790182B2 - Strainer for chemical tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chemical tank used in a working machine or the like for spraying or spraying chemicals such as agricultural chemicals, and more particularly to a strainer attached to an inlet of the chemical tank.
[0002]
[Prior art]
For example, in a backpack type power sprayer, a chemical tank in which a chemical solution such as agricultural chemicals to be sprayed is mounted is mounted on the backpack frame, and is used while being carried on the back of an operator. Since such a backpack type power sprayer is mainly used in farmland, water that dissolves agricultural chemicals is often drawn directly from the agricultural waterway, and foreign substances such as sand are easily mixed in the chemical tank.
[0003]
Therefore, conventionally, a detachable strainer (filter) is attached to the injection port of the chemical liquid tank so as to prevent foreign matters from entering the chemical liquid tank.
[0004]
Moreover, the chemical | medical solution stored in a chemical | medical solution tank dilutes a concentrated chemical | medical solution with a solvent, generally water so that it may become a desired dilution rate. Generally, this chemical solution is made by putting predetermined amounts of water and concentrated chemical solution into a chemical solution tank. The chemical tank is usually translucent or transparent, and the liquid level in the chemical tank can be visually observed. Therefore, the water level is determined by injecting until the liquid level reaches a specific position in the chemical tank. be able to. This injection of water is performed through a strainer to prevent foreign matter from entering. On the other hand, since the concentrated chemical solution is small, it is put into the chemical solution tank using a measuring cup.
[0005]
By the way, since the measuring cup is stored separately from the power sprayer, there is a problem that it is easily lost. In order to solve such a problem, conventionally, a strainer attached to an inlet of a chemical tank is provided with a measuring function.
[0006]
As shown in FIG. 6, the conventional strainer 1 with a weighing function has a cup-shaped portion 3 at the center of the end plate portion 2. When the strainer 1 is turned upside down, the cup-shaped portion 3 has an open end 4 facing upward so that a chemical solution can be poured. In addition, the cup-shaped portion 3 of the strainer 1 has an inner diameter that is gradually increased toward the open end 4 side along the axial direction so that measurement is possible. That is, a plurality of annular step surfaces 5, 6, 7 are formed on the inner peripheral surface of the cup-shaped portion 3. On each of the step surfaces 5, 6 and 7, a liquid amount display, for example, a dilution ratio of the concentrated chemical solution with respect to a predetermined amount of water is written. Accordingly, when it is desired to obtain a concentrated chemical solution in an amount that achieves a desired dilution ratio, the concentrated chemical liquid is applied to the cup-shaped portion 3 so that the liquid level coincides with the step surfaces 5, 6, and 7 on which the dilution ratio is indicated. Just put it in.
[0007]
[Problems to be solved by the invention]
However, in the conventional strainer 1 as described above, the measuring cup-shaped portion 3 has a structure in which cylinders having different diameters are coaxially arranged stepwise, so that a large amount of liquid (dilution ratio) can be obtained. If a large number of liquid level indications are to be entered to cope with this, it is necessary to form a large number of annular step surfaces 5.6 and 7. In such a case, if the width (the length in the radial direction) of the step surfaces 5, 6, 7 is kept relatively large, the diameter of the open end 4 of the cup-shaped portion 3 is increased and formed on the end plate portion 2 of the strainer 1. The opening 9 with the mesh 8 (only one is shown) becomes narrow. When the opening 9 becomes narrow, there arises a problem that it takes time to inject water or the like. Conversely, if the diameter of the open end 4 of the cup-shaped portion 3 is reduced in order to ensure a wide opening 9 of the threader 1, the width of the step surfaces 5, 6, 7 is reduced, and the liquid written therein The quantity display becomes smaller. Therefore, it is difficult to see the liquid amount display, and it becomes difficult to measure the concentrated chemical solution.
[0008]
In addition, when a large number of annular step surfaces 5, 6 and 7 are formed, the width becomes narrow and the height difference between the step surfaces becomes small, so that it is difficult to align the liquid level.
[0009]
Further, for example, if a common strainer 1 is used for a 10-liter tank and a 15-liter tank, the liquid amount display becomes complicated in the case of having stepped annular step surfaces 5, 6, and 7. It becomes difficult to use. Therefore, as a result, it is necessary to prepare a dedicated strainer 1 for each capacity chemical tank, and the number of strainers 1 increases, which is disadvantageous in terms of manufacturing and management.
[0010]
Therefore, an object of the present invention is to provide a strainer with a weighing function that can solve the conventional problems.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a strainer (26) removably attached to an inlet (22) of a chemical tank (12), comprising a cylindrical part (28) and a cylindrical part (28). ) And an end plate portion (30) in which an opening (32) having a filter member (34) is formed, and a cup-shaped portion (36) provided in the end plate portion (30). The inner peripheral surface of the cup-shaped portion (36) is divided into a plurality of regions (40a to 40f) in the circumferential direction, and each of the regions (40a to 40f) has a predetermined height for the region (40a to 40f). It is characterized by having step surfaces (42a to 42f) extending outward at the position, and liquid level indications are written on each of the step surfaces (42a to 42f).
[0012]
In this configuration, since the step surfaces (42a to 42f) serving as the weighing gauges are formed in the circumferential direction, the width can be maintained large even if a large number of them are formed. Therefore, the liquid level display such as the dilution rate can be greatly added to each step surface (42a to 42f). Further, even if the number of stepped surfaces (42a to 42f) increases, the diameter of the open end portion (38) of the cup-shaped portion (36) does not increase, so the end plate portion (30) of the strainer (26). A large opening (32) can be secured.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In this specification, terms such as up and down and height are used based on the state shown in the figure.
[0014]
FIG. 1 is an elevation view showing a back-type power sprayer to which a strainer with a weighing function according to the present invention can be applied. A backpack type power sprayer 10 shown in the figure drives a chemical liquid tank 12 that stores chemical liquid such as agricultural chemicals, a pump 14 that sucks the chemical liquid in the chemical liquid tank 12 and pumps it to a spray nozzle (not shown), and a pump 14. And an internal combustion engine 16 as a prime mover and a fuel tank 18 for storing the fuel of the internal combustion engine 16. These are arranged on the backpack frame 20, and the user carries out the work while carrying the backpack frame 20.
[0015]
The chemical liquid tank 12 of such a power sprayer 10 is made of a translucent synthetic resin, and the amount of the internal chemical liquid can be visually recognized from the outside. In the upper part of the chemical liquid tank 12, an injection port 22 for injecting the chemical liquid into the chemical liquid tank 12 is formed. The injection port 22 is a substantially cylindrical body projecting from the chemical liquid tank 12, and a threaded portion is formed on the outer peripheral surface thereof. A cap 24 for closing the injection port 22 is screwed into the screw portion.
[0016]
In addition, a strainer (filter) 26 with a metering function according to the present invention is detachably attached to the inlet 22 of the chemical liquid tank 12. 2 to 4, the strainer 26 has a substantially cylindrical tubular portion 28 inserted into the inlet 14 and one end of the tubular portion 28 (the upper end portion in the state of FIG. 2). The closed end plate portion 30 is integrally formed. A plurality of openings 32 are formed in the outer peripheral portion of the end plate portion 30, and each opening 32 serves as a filter member for capturing foreign substances contained in a liquid such as water replenished to the chemical liquid tank 12. The mesh 34 is stretched.
[0017]
A cup-shaped portion 36 for measuring the concentrated chemical solution is integrally formed at the center of the end plate portion 30. The cup-shaped portion 36 is coaxial with the cylindrical portion 28 of the strainer 26 and extends to the open end side of the cylindrical portion 28. Therefore, as shown in FIGS. 2 and 4, by turning the strainer 26 upside down, the open end 38 of the cup-shaped portion 36 faces upward, and the concentrated drug solution to be metered can be poured therefrom. .
[0018]
The inner peripheral surface of the cup-shaped portion 36 is equally divided into a plurality of (six in the illustrated embodiment) regions 40a to 40f in the circumferential direction. In each of the regions 40a to 40f, step surfaces 42a to 42f extending outward from the central axis of the cup-shaped portion 36 are formed at predetermined height positions. Here, the height position refers to a vertical position from the deepest point 44 of the cup-shaped portion 36 in a state where the central axis of the cup-shaped portion 36 is oriented vertically and the open end 38 of the cup-shaped portion 36 is directed upward. Let's say distance.
[0019]
The step surfaces 42 a to 42 f have the same area, and the outer edge thereof is an arc centered on the central axis of the cup-shaped portion 36. These outer end edges are connected to the inner peripheral edge of the end plate portion 30 that defines the open end portion 38 of the cup-shaped portion 36 via a substantially cylindrical surface. The step surface 42 a is flush with the outer surface of the end plate portion 30 of the strainer 26.
[0020]
The surface including the step surfaces 42 a to 42 f is orthogonal to the central axis of the cup-shaped portion 36. Therefore, when the end plate portion 30 of the strainer 26 is vertically upward, the step surfaces 42a to 42f are also vertically upward, and the user can see each step surface from above.
[0021]
The height positions at which these step surfaces 42a to 42f are formed are as shown in FIG. 5 which is a development view of the inner peripheral surface of the cup-shaped portion. In the present embodiment, the height of the stepped surface 42a is set to be 1000 times that of the liquid when the liquid is put in the cup-shaped portion 36 and the liquid level coincides with the stepped surface 42a with respect to the solvent of 15 liters. The amount is determined to be a dilution factor. Further, the height positions of the step surface 42b and the step surface 42c are 1500 times and 2000 times the amount of liquid with respect to 10 liters of solvent when the liquid level of the liquid in the cup-shaped portion 36 coincides with the step surface. It is determined to be an amount that will be a dilution ratio. Furthermore, similarly, the height positions of the step surfaces 42d to 42f are determined to be 1000, 1500, and 2000 times the dilution ratio for 10 liters of solvent, respectively.
[0022]
Moreover, the above-mentioned dilution rate is described on each level | step difference surface 42a-42f as a liquid quantity display. As apparent from FIGS. 2 and 55, the step surfaces 42a to 42c are continuous and are weighing gauges for 15 liters of solvent, and therefore, the outer portions of these step surfaces 42a to 42c (that is, the end plate portions 30). "15L" is attached to the inner peripheral portion 46a. Furthermore, “10L” is displayed on the outer portion 46b of the step surfaces 42d to 42f, which are measurement gauges for 10 liters of solvent.
[0023]
As described above, in the strainer 26 of the present embodiment, there are a large number of six types of dilution ratios including three types of dilution ratios for 15 liters of solvent and three types of dilution ratios for 10 liters of solvent. Is entered as a liquid level indicator. However, unlike the conventional configuration shown in FIG. 6, the step surfaces 42a to 42f are divided in the circumferential direction, and the radial width can be made relatively large. It becomes possible and it becomes easy to see.
[0024]
A method of making a chemical solution such as agricultural chemicals from water as a solvent and a concentrated chemical solution using the 10 liter chemical solution tank 12 having the strainer 26 having the above-described configuration will be described below.
[0025]
First, the cap 24 is removed from the inlet 22 of the chemical tank 12. When the cap 24 is removed, the strainer 26 remains attached to the inlet 22, and the end plate portion 30 faces downward. Next, when water is injected from the open end of the strainer 26, even if some foreign matter is mixed in the water, a part of the water is captured by the mesh 34 of the end plate portion 30, and only the filtered water is filtered. Introduced in. Since the chemical tank 12 is translucent, the position of the water surface can be confirmed from the outside, and when the water surface reaches a predetermined position, the injection of water is stopped. Thus, 10 liters of water is stored in the chemical tank 12.
[0026]
Thereafter, the strainer 26 is removed from the inlet 22 and turned upside down. Thereby, the open end 38 of the cup-shaped portion 36 of the strainer 26 faces upward, and the step surfaces 42a to 42f can be viewed from above. In this state, select the one showing the desired dilution factor from the step surfaces 42d to 42f displaying the dilution factor for 10 liters, and cup the concentrated chemical solution so that the step surface and the liquid surface coincide. Into the shaped portion 36. For example, when a chemical solution diluted 1500 times is made, the concentrated chemical solution is added until the liquid level coincides with the stepped surface 42e. Then, the concentrated chemical liquid obtained in this way as a desired liquid volume is poured into the chemical liquid tank 12 from the injection port 22, the strainer 26 and the cap 24 are attached to the injection port 22, and the chemical liquid tank 12 is shaken, thereby A chemical solution having a desired concentration is completed in the tank 12.
[0027]
In addition, the strainer 26 of this embodiment can be applied to the chemical liquid tank 12 having a capacity of 15 liters as it is. In that case, the step surfaces 42a to 42c for 15 liters are used.
[0028]
Although the preferred embodiments of the present invention have been described in detail above, it is needless to say that the present invention is not limited to the above embodiments.
[0029]
For example, in the above embodiment, the strainer is used for the chemical tank in the back-type power sprayer. However, the strainer of the present invention can also be applied to a chemical tank in other devices or a single chemical tank having no drive unit. it can.
[0030]
Further, the liquid amount display written on the stepped surface of the cup-shaped portion in the strainer is not limited to the dilution factor, and may be a volume display such as “cc”.
[0031]
Furthermore, the stepped surfaces need not be arranged stepwise from small to large in the circumferential direction, and can be arranged randomly. Therefore, in the case of a strainer using an annular step surface as in the prior art, if a large number of step surfaces are formed, the difference in height between adjacent step surfaces will necessarily be small, making it difficult to align the liquid level. According to the present invention, the height difference between the step surfaces can be increased.
[0032]
Furthermore, the shape of the cup-shaped portion is not limited to the circular cross section as in the above embodiment, and the number of step surfaces (segmented regions) is not limited to six.
[0033]
【The invention's effect】
As described above, the strainer of the present invention can obtain various liquid amounts at the cup-shaped portion which is the measuring portion. In order to obtain various liquid amounts in this way, it is necessary to display a large number of liquid amounts. However, according to the present invention, even if a large number of step surfaces, which are the entry points of the liquid amount display, are provided, the width is maintained wide. The liquid amount display can be greatly written. Accordingly, the weighing operation is easy to see.
[0034]
Further, the height difference between the step surfaces can be increased, and the liquid surface can be easily aligned.
[0035]
Furthermore, since the area of the open end of the cup-shaped part can be kept small even with a large number of liquid amount indications, the strainer's filter part can be enlarged, and it can pass through the liquid injected into the chemical liquid tank. The original performance of the strainer and filterable strainer is not impaired.
[0036]
In addition, since a large number of liquid amount indications can be attached, a common strainer can be used for chemical liquid tanks of different capacities, which is advantageous in terms of manufacturing and management.
[Brief description of the drawings]
FIG. 1 is an elevation view showing a power sprayer to which a strainer according to the present invention is applicable.
FIG. 2 is a perspective view showing a strainer according to the present invention.
FIG. 3 is a plan view showing the strainer of FIG. 2;
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a development view showing an inner peripheral surface of a cup-shaped member in the strainer of FIG. 2; FIG.
FIG. 6 is a perspective view showing a conventional strainer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Power sprayer, 12 ... Chemical tank, 22 ... Inlet, 24 ... Cap, 26 ... Strainer, 28 ... Cylindrical part, 30 ... End plate part, 32 ... Opening part, 34 ... Mesh (filter member), 36 ... Cup-shaped part, 38 ... Open end, 40a to 40f ... Region, 42a to 42f ... Step surface, 44 ... Deepest point.

Claims (1)

A strainer (26) removably attached to the inlet (22) of the chemical tank (12),
A tubular portion (28);
An end plate portion (30) in which an opening (32) having a filter member (34) is formed and one end of the cylindrical portion (28) is closed;
A cup-shaped portion (36) provided on the end plate portion (30),
The inner peripheral surface of the cup-shaped portion (36) is divided into a plurality of regions (40a to 40f) in the circumferential direction,
Each of the regions (40a to 40f) has a step surface (42a to 42f) extending outward at a predetermined height position with respect to the region (40a to 40f), and
A strainer for a chemical liquid tank, characterized in that a liquid amount display is written on each of the step surfaces (42a to 42f).

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