JP3493553B2 - Water storage tank - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents contamination of dust such as leaves and twigs and generation of water-bloom, aquatic plants, etc., and prevents deterioration of the material of the flexible sheet that is the canopy, The present invention relates to a water storage tank which prevents sticking of water due to freezing and thus enables vertical movement of a canopy sheet in the water storage tank.

[0002]

2. Description of the Related Art There are water storage tanks used for the following purposes, for example. An agricultural water tank whose main purpose is to supply water to agricultural products. Water tank for disaster prevention whose main purpose is to extinguish a fire. A life-supporting water tank to secure drinking water in case of an emergency such as an earthquake.

By the way, the water tank with a canopy that has been generally used in the past has a dome-shaped canopy a installed on the side wall b of the water tank, as shown in FIG.
As shown in FIG. 7, a flat panel-shaped canopy a is cast on the outside of the side wall b of the water tank to form a pedestal d, and the pedestal d is
The main structure is to fix the canopy a to the pin c at the upper end of the.

However, in any of the above-mentioned conventional examples, since the method of fixing the canopy a to the side wall b of the water tank or the pedestal d is adopted, the total weight of the canopy a and / or Or, the snow load will be applied to the water tank body, so not only must the strength of the water tank body be endured, but there is also a problem in terms of construction cost. In the event of an earthquake, it was no wonder that the fixed parts such as the pin c stop were destroyed.

Therefore, for example, as shown in FIG. 8, a water storage which is floated above the water surface in the water tank body e and is also called a floating canopy a'which moves up and down in accordance with the fluctuation of the water level in the water tank body e. The tank is also being developed. Similarly, as shown in FIG. 9, even if a floating canopy a ′ that moves up and down in accordance with a change in the water level in the water tank e is adopted, the canopy a ′
A rubber plate g contacting the inner surface of the side wall of the water tank e on the outer peripheral edge of the
And a water storage layer formed so as to move up and down under the water surface of the water storage tank e as the water level changes.

[0006]

Since the one shown in FIG. 8 does not connect the canopy a'to the water tank body e, a load is applied to the water tank body as shown in FIG. 6 or 7. However, the problem that the structure of the water tank body e is adversely affected has been solved, but the water tank body e is moved so that the canopy a ′ can move up and down in the water tank body e.
A gap f was provided between the side wall of the canopy and the outer peripheral edge of the canopy a '. As a result, dust invades into the water tank body e through the gap f and the water in the water tank body e is exposed to the outside, which causes the generation of water-bloom and aquatic plants.

In this way, when sunlight shines into the water tank, water-bloom and water plants are generated, and when the water has a bad odor, it cannot be used as the life-supporting water tank, that is, drinking water. There was a problem in using it as an agricultural water storage tank, such as a bad odor in the water channel through which this water flows.

Further, the canopy a'is generally formed partly or wholly by using a rubber plate or a synthetic resin plate. In the conventional example shown in FIG. It is known that this canopy a'is exposed to direct sunlight and is affected by solar heat, ozone, and ultraviolet rays, leading to early deterioration of the material. Due to the contact, the water in the water tank freezes in the winter, and as a result, ice may form between the canopy and the side wall, which makes it unusable in cold regions.

On the other hand, in the conventional example shown in FIG. 9, since the rubber plate g is arranged on the outer peripheral edge of the canopy a'as described above, and the rubber plate g is slidably contacted with the inner surface of the side wall of the water tank. Due to the presence of the intake pipe, the spillway, the intake tower, the stairs, etc., which are formed in the water tank e, it is difficult for the canopy a'to move up and down smoothly, and the canopy a'is tilted. As a result, extra stress is applied to the canopy a ′, and the canopy a ′ itself may be damaged.

[0010]

In order to solve the above-mentioned problems, the water tank according to the present invention (claim 1) has a width from the upper end of the side wall of the water tank body to almost the bottom, and has a desired position. A water-impermeable flexible sheet with a weight on the
The end portion is attached to the upper end of the side wall of the water tank body, the float and the air vent are provided in the flexible sheet, and the water layer is provided on the flexible sheet.

In order to solve the above-mentioned problems, the water storage tank according to the present invention (claim 2) is characterized in that the water-impermeable flexible sheet is provided on a portion along the side wall of the water storage tank main body and a bottom portion in the empty state. The part along which it is formed is removable.

Further, the water storage tank according to the present invention (claim 3)
In order to solve the above problems, the water-impermeable flexible sheet is formed of a water-repellent material.

In order to solve the above-mentioned problems, in the water storage tank according to the present invention (claim 4), the air vent port is formed in a part of the float.

Further, the water tank according to the present invention (claim 5)
In order to solve the above-mentioned problems, in a water tank body, a spillage pipe that opens to a set water level on the lower surface of a flexible sheet in this water tank body and a spillway that opens to a set water level on a water layer on the upper surface of the flexible sheet A pipe is provided, and the water level of the lower surface of the flexible sheet is higher than the water level of the water layer on the upper surface of the flexible sheet.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a water storage tank according to the present invention will be described with reference to FIGS. 1 to 5. Reference numeral 1 is a water storage tank main body, and this water storage tank main body 1 itself has been conventional. Its shape and internal structure are the same as those generally used, and thus they are cylindrical or box-shaped.

Reference numeral 2 is a water-impermeable flexible sheet disposed in the water tank body 1, and this flexible sheet 2
Serves as the canopy described as the conventional example. Therefore, the flexible sheet 2 has a width from the upper end of the side wall 3 of the water tank body 1 to almost the bottom portion 4, and the end portion of the flexible sheet 2 is attached to the upper end of the side wall 3 of the water tank body 1. . When attaching the flexible sheet 2, a rope 12 can be attached to the upper edge of the flexible sheet 2, and the rope 12 can be hooked on a hook 13 fixed to the outer surface of the side wall 3 of the water tank body 1.

When the flexible sheet 2 is arranged on the water tank body 1 as described above, the flexible sheet 2 allows the inner surface of the side wall 3 and the bottom portion 4 of the water tank body 1 to be covered.
However, the water tank main body 1 has a portion along the side wall 3 and a bottom portion 4 of the water tank main body 1 in the empty state, that is, a portion along the bottom portion 4, that is, for the convenience of periodical cleaning. A corner formed by the side wall 3 and the bottom 4 or the vicinity thereof is detachably formed by, for example, a fastener 5. By releasing this fastener 5, the water tank body 1
The bottom 4 and the inner surface of the side wall 3 can be opened.

A float 6 and an air vent 7 are provided at the center of the flexible sheet 2. Of these, the air vent 7 may be formed in a part of the float 6 as shown in FIG. A hollow body made of synthetic resin can be used for the float 6, and the air vent 7 may be formed by forming a vertically penetrating hole at the center of the float 6. However, the float 6 and the air vent 7 do not prevent forming as different objects. A check valve 6'for exclusive use of exhaust may be arranged near the float 6.

The flexible sheet 2 may be made of any material as long as it is basically impermeable to water. For example, if a material having water repellency such as synthetic resin is used, As will be described later, even if water is present on the upper surface of the flexible sheet 2, the water does not freeze together with the flexible sheet 2.

Reference numeral 8 denotes a weight placed at a desired position of the flexible sheet 2, and this weight smoothly moves the flexible sheet 2 up and down, and
It is used to bring the flexible sheet 2 into close contact with the water level on the lower surface of the. Therefore, this weight 8 can use an iron rod or an iron piece.

Reference numeral 9 denotes a water conduit pipe which opens from the upper end of the side wall 3 of the water tank body 1 to the bottom 4 via the inner surface of the side wall 3.

Then, water is supplied from the water conduit 9 to the water tank body 1. Then, the water pressure causes the flexible sheet 2 to rise against the weight of the weight 8. On the other hand, when the flexible sheet 2 is properly raised and water is separately supplied to the upper surface of the flexible sheet 2 to form the water layer 10, the float 6 acts and the float 6 portion becomes the apex. To jump to the surface of the water layer 10. Further, when water is supplied from the water conduit 9 to the lower surface of the flexible sheet 2, the air that may be supplied together with the water is formed between the air vent port 7 and / or the side wall upper end of the water tank body 1 and the flexible sheet 2. It is released to the outside air through the gap at the joint. When water is supplied to the water tank body 1, the flexible sheet 2 is transformed into the state shown in FIG. 1, but the air may remain in the vicinity of the float 6, but the remaining air is reversed. It is released from the stop valve 6'to the outside air.

Therefore, the flexible sheet 2 also rises with the water level of the water supplied from the water conduit 9 and the discharge pipe 11
When the sheet is discharged from the flexible sheet 2, the flexible sheet 2 also descends. On the other hand, in the water storage state, the weight 8 causes the lower surface of the flexible sheet 2 to be in close contact with the deformed water surface in the water tank body 1 so as to conform thereto.

Reference numeral 14 is a spillage pipe vertically arranged inside the water tank body 1, and 14 'is a spillage pipe opened on the upper surface of the flexible sheet 2. Of these, the former, that is, the spillage pipe 14 disposed inside the water tank body 1 is opened to the set water level of the water reservoir body 1, and the latter, that is, the spillage pipe 14 ′ is the upper surface of the flexible sheet 2. The water layer 10 is arranged so as to open at the set water level. Therefore, the former spillage pipe 14 can be formed of a hard pipe, but the latter spillage pipe 14 ′ is a bellows pipe in order to follow the vertical movement of the flexible sheet 2. I am using. Since the water level in the water tank body 1 needs to be higher than the water level on the upper surface of the flexible sheet 2, the opening of the former spillage pipe 14 is larger than the opening of the latter spillage pipe 14 'when full. It is necessary to arrange so that it is also at a high position.

However, these spillage pipes 14, 14 '
Due to the presence of the above, the flexible sheet 2 assumes a stable posture symmetrically between the upper and lower water layers.

[0026]

As described above, according to the water storage tank (Claim 1) of the present invention, a water-impermeable flexible sheet having a width extending from the upper end of the side wall of the water storage tank main body to the bottom thereof is provided. Since the flexible sheet is attached to the upper end of the side wall of the water tank body, and the flexible sheet is provided with a float and an air vent, and a water layer is provided on the flexible sheet, impurities such as dust may enter the water in the water tank. As a result, it not only prevents dust and dirt from leaves and twigs, but also prevents the generation of water-blooms and aquatic plants, and also exists in the water tank when the flexible sheet acting as a canopy moves up and down. There is no obstacle due to various projections and it can be done smoothly, and the construction cost is greatly reduced compared to the water tank with the fixed canopy shown in the above-mentioned conventional example. It has a effect that can be achieved.

Further, according to the water storage tank of the present invention (claim 2), the water-impermeable flexible sheet is configured such that the portion along the side wall and the portion along the bottom of the water storage tank main body are detachable in the empty state. Since it is formed, it has an effect that the inner surface of the side wall of the water tank main body and the bottom portion which are covered with the flexible sheet at the time of use can be cleaned.

Further, the water storage tank according to the present invention (claim 3)
According to the above, since the water-impermeable flexible sheet is formed of a water-repellent material, the water layer on the upper surface of the flexible sheet does not freeze together with the flexible sheet, and therefore the flexible sheet can be formed even in winter. This has the effect that smooth vertical movement can be achieved.

Further, according to the water tank of the present invention (claim 4), since the air vent port is formed in a part of the float, water is supplied to the lower surface covered with the water impermeable flexible sheet. At this time, the air that may be mixed with water and supplied may be released to the outside air, and thus the lower surface of the flexible sheet has an effect of realizing a state in which air does not exist in normal times.

Further, the water storage tank according to the present invention (claim 5)
According to the above, in the water tank body, the spillage pipe that opens to the set water level on the lower surface of the flexible sheet and the spillage pipe that opens to the set water level of the water layer on the upper surface of the flexible sheet are provided in the water tank body. However, since the water level of the lower surface of the flexible sheet is higher than the water level of the water layer on the upper surface of the flexible sheet, the presence of these spill pipes allows the flexible sheet to exhibit a symmetrically stable posture between the upper and lower water layers. It has the effect that

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a water storage tank according to the present invention.

FIG. 2 is a cross-sectional view showing how a flexible sheet is attached to a water tank body.

FIG. 3 is a plan view showing an embodiment of a water tank according to the present invention.

FIG. 4 is a sectional view showing an embodiment of the water tank according to the present invention when empty.

FIG. 5 is a sectional view of the float.

FIG. 6 is a cross-sectional view showing a conventional example.

FIG. 7 is a cross-sectional view showing a conventional example.

FIG. 8 is a cross-sectional view showing a conventional example.

FIG. 9 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

1 water tank body 2 Flexible sheet 3 side walls 4 bottom 5 fasteners 6 floats 6'check valve 7 Air vent 8 weights 9 water conduit 10 water layers 11 discharge pipe 12 rope 13 hooks 14,14 'spillway

─────────────────────────────────────────────────── ─── Continuation of the front page (73) Patent holder 500309414 Bando Kogyo Co., Ltd. 7-1-18 Mizuki-dori, Hyogo-ku, Kobe-shi, Hyogo (73) Patent holder 000201504 Maeda Seikan Co., Ltd., Sakata City, Yamagata Prefecture Honmachi 6-7 (72) Inventor Isamu Nagatsuka 22-16 Midorigaoka, Tsukuba, Ibaraki (72) Inventor Naoya Fujimoto 2-8-123-303 Namiki, Tsukuba, Ibaraki (72) Tsuneo Naoe, Tsukuba, Ibaraki 3090 (72) Inventor Tetsuro Miyata 4-9-3 Matsugaya, Taito-ku, Tokyo (72) Inventor Fujio Muroi 1773 Kawashimadaira Kawashima, Tajima-cho, Minamiaizu-gun, Fukushima Prefecture Inventor Kuruji Kouji Toyosu, Koto-ku, Tokyo 5-2-1-1302 (72) Inventor Uzaburo Nakaura 3-25-2-106 Shioya-machi, Tarumi-ku, Kobe-shi, Hyogo (72) Inventor Katsuyasu Sato 3-34 Bizen-cho, Mito-shi, Ibaraki (56) Reference Sentence Contribution JP 2001-19087 (JP, A) JP 2002-12291 (JP, A) Actual development 55-41308 (JP, U) Actual development 55-126082 (JP, U) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B65D 88/34 A01G 25/06 E03B 11/00

Claims (5)

(57) [Claims] 1. A water-impermeable flexible sheet having a width from the upper end of the side wall of the water tank body to almost the bottom and having a weight at a desired position, the end portion of which is the upper end of the side wall of the water tank body. A water tank characterized in that the flexible sheet is provided with a float and an air vent, and a water layer is provided on the flexible sheet. 2. The water storage tank according to claim 1, wherein the water-impermeable flexible sheet has a portion along the side wall and a portion along the bottom of the water storage tank body which are detachable in a state of empty water. 3. The water storage tank according to claim 1, wherein the water-impermeable flexible sheet is made of a water-repellent material. 4. The water tank according to claim 1, wherein the air vent port is formed in a part of the float. 5. A water storage tank main body is provided with a spillage pipe that opens to a set water level on a lower surface of a flexible sheet and a spillage pipe that opens to a set water level of a water layer on an upper surface of the flexible sheet in the water storage tank main body. The water tank according to claim 1, claim 2, claim 3, or claim 4, wherein the water level of the lower surface of the flexible sheet is higher than the water level of the water layer on the upper surface of the flexible sheet.