JP2000270697A - Water supply device using pet bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide at a low cost a PET bottle water supply device which can automatically supply water to a plant in a flowerpot or a planter for about one to two weeks, even when a family is absent at a home due to a trip or the like. SOLUTION: This water supply device for supplying water to a plant effectively uses a PET bottle 2 which is a plastic bottle used for a drink, and has a mechanism for changing the inclination angle of the bottle to increase the water pressure in response to the decrease of the water in the bottle. The device further has a special stopper 10 or a lid for gradually pouring out the water. Thereby, the device can automatically supply the water to a crop for a certain period in a green house without needing an expensive water supply installation. In a dry area such as a desert, the device can automatically and gradually supply water to a crop for a certain period without needing an expensive installation and a power, thereby capable of raising the crop without consuming the water wastefully. The plastic bottle which is used for a drink, is discarded or recycled after used, and is called a PET bottle can thus effectively be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

(A) It is possible to provide an inexpensive apparatus for automatically supplying water to plants in plant pots and planters, which are often placed in ordinary households, even when no family member is present. Water is supplied so that the plants in the flowerpots and planters do not run out of water even if you leave your home for about two weeks on a trip. (B) Without requiring expensive water supply facilities for crops in the greenhouse,
Automatically supply water for a period. (C) In dry lands such as deserts, water can be supplied little by little automatically for a certain period of time without using expensive equipment or power, and crops can be grown without wasting water. (D) For a water container, a plastic container for drinks called a PET bottle, which is commercially available in large quantities and discarded or recycled after use, is effectively used.

[0002]

2. Description of the Related Art (A) As a household product, a device for guiding water with a hose using a tap as it is and supplying water using a timer and an electromagnetic valve is commercially available. Is high. Using a special container makes it even more expensive. (B) If a large amount of water is given to the planter at once and a rubber stopper is plugged into the hole at the bottom of the planter before going on a long-term trip, the water is not short for a long time, but the root of the plant is damaged. (C) In dry lands such as deserts, water supply pipes are used, and cultivation methods in which water is thoroughly conserved by using drip hoses and the like are used. (D) Water is often supplied by watering in a greenhouse, but requires dedicated piping, a watering device, and a control device using a timer at high places, which is too expensive for those who own small greenhouses.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive apparatus for supplying water stably to plants over a period of about one to two weeks.

[0004]

SUMMARY OF THE INVENTION The present invention makes effective use of plastic containers for drinks called PET bottles, which are generally commercially available and are discarded or recycled after use, and are useful for watering plants. It is to try. PET bottles are almost the same size and shape as long as they have the same capacity, and it is not necessary to prepare devices for holding PET bottles of various sizes. Means, form, and operation of the device of the present invention for solving the problem will be described below with reference to the drawings. In the following description, a plastic container for drinks called a PET bottle is simply described as a PET bottle which is generally called. (A) FIG. 1 is a perspective view showing a use state of the device of the present invention. The PET bottle 2 contains water, and 4 is the position of the water surface. The water may be nutrient water. The cap originally attached to the PET bottle is removed, and a special plug 10 attached to the cap is passed through a fibrous string 11 as described later. Water is supplied to the plant 1 through this string 11 inserted into the soil 19. The tube 3 is for preventing the inside of the plastic bottle from being negatively pressured even if the water is reduced by water supply. Water supply becomes almost impossible if the pressure inside the plastic bottle becomes negative. The tube 3 is passed through a hole formed in the main body of the special plug 10, one end of which extends outside the container, and the other end of which is located near the bottom in the container. External air flows into the portion near the bottom of the PET bottle container through the tube 3, and even if the water in the PET bottle is reduced by water supply, the inside of the PET bottle does not become a negative pressure. A front support 7 supports a portion of the PET bottle container near the neck. The front support 7 has a window-shaped support 8 located low. The window-shaped support portion 8 is elongated in the up-down direction, and the portion near the neck of the PET bottle container can move up and down slightly. The rear support 5 supports a portion closer to the bottom than the center of the PET bottle container. The rear support 5 has a window-shaped support 6 positioned high. The window-shaped support portion 6 is vertically elongated, and a portion closer to the bottom than the center of the PET bottle container can move up and down. An intermediate fulcrum member 9 is arranged between the front support 7 and the rear support 5. The upper part of the intermediate fulcrum material 9 contacts the plastic bottle and supports the weight of the plastic bottle to some extent. Rear support 5,
In FIG. 1, the front support 7 and the intermediate fulcrum material 9 are manufactured by processing a thick wire, and the lower portion is embedded in soil 19 and fixed. (B) FIG. 2 is a sectional view showing a special plug used in the apparatus of the present invention. The same applies to the special plug 10 of FIG. A hole is made in the body portion 12 of the plug, through which a fibrous string 13 passes. In order to pass the string 13 through the hole, the material of the string is made of a synthetic fiber such as nylon, and the tip of the string is heated and melted to make it thinner, then put in the hole, and then pulled. By doing so, a string having a larger diameter than the hole diameter is passed, the density of the string in the plug is increased, and an element having a high fluid resistance value is obtained. The higher the fluid resistance, the smaller the amount of water supply per unit time. By changing the diameter of the hole and the diameter of the cord, plugs with various water supply characteristics can be made. The same effect can be obtained by using a thin, slightly water-permeable substance instead of a string. A tube 91 is covered on the string that has come out to the thick side of the stopper. Tube 91
Prevents evaporation of moisture in the string. Another hole is drilled in the body portion 12 of the stopper, through which a tube 14 passes. There is no gap between the body portion 12 of the stopper and the tube 14 so that water does not leak. One end of the tube 14 is attached to the main body 1 of the stopper.
It comes out short on the thick side of 2, that is, the one that comes to the outside when attached to a plastic bottle. The other end of the tube 14 is on the narrow side of the body portion 12 of the stopper, that is, the side that comes into the container when attached to the plastic bottle, and is located near the bottom in the container. This makes the tube on this side longer. The hole for passing the string 13 and the hole for passing the tube 14 may be the same single hole. (C) FIGS. 3 and 4 are cross-sectional views illustrating the operation of the device of the present invention shown in FIG. (C-1) Description of FIG. 3 The PET bottle 2 is filled with water, and the first water surface position is the water surface position 15. PET bottle support 5
The front support 7 has a window-shaped support portion 6 which is positioned high and a window-shaped support portion 8 which is positioned low. Intermediate fulcrum material 9
The top of the bottle comes in contact with the bottle and supports the weight of the bottle to some extent. At this point, the position of the center of gravity of the plastic bottle including water is the position of the center of gravity 16. Center of gravity position 16
Is located on the bottom side of the plastic bottle rather than directly above the intermediate fulcrum material 9. For this reason, the PET bottle hits on the intermediate supporting member 9 and below the window-like supporting portion 6 of the rear support 5, or on the intermediate supporting member 9 and the window-like supporting portion 8 of the front supporting member 7. Supported by its weight. Window-shaped support 8 and window-shaped support 6
Has little lateral dimensional margin for PET bottles,
Prevents lateral displacement of plastic bottles. The water in the PET bottle oozes out of the string 11 passed through the special plug 10 as a minute flow due to gravity and capillary action, and is supplied to the soil 19. Air outside the container flows into the portion near the bottom inside the PET bottle through the tube 3, and the inside of the PET bottle does not become a negative pressure. The amount of water per unit time that oozes out of the string of the plastic bottle is greatly affected by the water pressure in the plastic bottle. If the water pressure is high, the amount of water supply per unit time is large, and if the water pressure is low, the amount of water supply per unit time is small. Water pressure is proportional to the height from the tap to the water surface. The height from the tip of the plug to the water surface at the first time is the height dimension X.
The water level is reduced by water supply. The water pressure decreases accordingly, and the amount of water supply per unit time decreases. When the position of the water surface is at the water surface position 17, the height from the tip of the plug to the water surface is the height dimension Y, which is considerably smaller than the height dimension X from the tip of the plug to the water surface at the first time. Water supply per hour is also reduced. At this time, the position of the center of gravity of the PET bottle is the position of the center of gravity 18, and the position of the center of gravity 18 is slightly closer to the neck of the PET bottle than directly above the intermediate fulcrum material 9. The PET bottle tries to rotate in a direction in which the inclination is further increased with the upper portion of the intermediate fulcrum material 9 as a fulcrum, as shown in FIG. (C-2) Other Descriptions of FIG. 4 The PET bottle 2 has a top part of the intermediate fulcrum material 9 as a fulcrum, and its neck part is greatly inclined downward. The portion of the PET bottle closer to the bottom than the center moves upward in the window-like support portion 6 of the rear support 5. The window-shaped support portion 6 is vertically long and does not hinder the movement of the plastic bottle. Further, the window-shaped support portion 8 of the front support 7 has a dimensional allowance that does not hinder the tilting of the portion near the neck of the plastic bottle. At this time, most of the weight of the PET bottle including water is supported by the front support 7 and the intermediate support 9. The position of the water surface is the water surface position 20, and the height from the tip of the plug to the water surface is the height dimension W. The height dimension W is greater than the height dimension Y in FIG.
The amount of water that exudes from the string 11 passed through the soil to the soil 19 also increases.
When the amount of water in the plastic bottle decreases, the inclination is automatically changed to increase the amount of water. When the water in the plastic bottle is further reduced and the remaining amount is about one-tenth of the initial level, the plastic bottle is removed by hand, the special plug 10 is removed, and water is sprayed on the root of the plant. Can be filled with water. For example, if water is supplied for 15 days using a plastic bottle having a volume of 2 liters, it is equivalent to 2.7 mm of rain per day on 500 square centimeters of land.
70 mm of rainfall. This is a lean water supply that allows crops to be grown in dry gardens such as deserts. FIG. 10 is a graph showing an example of the relationship between the water supply amount and the elapsed date. The reason for the large amount of water supply on the last day is that people spray water remaining in plastic bottles on plants. Although the amount of water supply varies considerably from day to day, it can be said that it is stable compared to natural rain. (D) FIG. 5 is a sectional view for explaining the operation of one example of the device of the present invention. The PET bottle 21 is held by a holder 22. A window-like supporting portion 27 located low on the retainer 22;
The PET bottle 21 is provided by the window-like supporting portion 25 positioned high.
Is almost stable. Water is contained in the PET bottle 21, and the first water surface position is at the water surface position 28. The retainer 22 is in contact with a high part of the base 24. The retainer 22 is attached to a base 24 by a shaft 23 and can rotate about the shaft 23. At this time, the position of the center of gravity of the holder 22 including the water and the plastic bottle is the center of gravity position 29. The center of gravity position 29 is the axis 23 attached to the base.
On the bottom side of the plastic bottle than directly above the center. Therefore, the PET bottle is stable in the state shown in FIG. The water in the PET bottle oozes out of the string 26 passed through the special stopper 32 as a small amount of flow due to gravity and capillary action.
3 is supplied. Air outside the container flows into the portion near the bottom inside the plastic bottle through the tube 59, and the inside of the plastic bottle does not become a negative pressure. When the position of the water surface becomes the water surface position 30, the position of the center of gravity of the retainer 22 including the water and the plastic bottle becomes the center of gravity position 31, and the position of the center of gravity 31 is slightly higher than the position just above the shaft 23. Come closer to the side. The retainer 22 rotates around the shaft 23 in a direction in which the inclination is further increased until the lower portion of the retainer 22 hits the base 24. In this case, the same result is obtained even if the mechanism is a fulcrum instead of the shaft 23. The increase in the water pressure and the amount of supplied water after the inclination is increased is the same as that described with reference to FIGS. (E) FIG. 6 is a sectional view for explaining an example of the device of the present invention. The PET bottle 34 is held on a support 35.
The plastic bottle 34 is placed almost stably by the window-like support portion 37 located low and the window-like support portion 36 located high on the support base 35. The window-shaped support portion 37 and the window-shaped support portion 36 may be U-shaped. The support 3 has a spring 3
8 is attached. The spring 38 pushes up a portion of the plastic bottle closer to the bottom than the neck. In FIG. 6, the PET bottle is sufficiently heavy with sufficient water, the spring is pressed, and the portion near the bottom of the PET bottle is in contact with the support base 35. The position of the water surface is at the water surface position 41. The water in the PET bottle oozes out of the string 72 passed through the special stopper 39 as a small amount of flow due to gravity and capillary action.
0 is supplied. Air outside the container flows into the portion near the bottom inside the PET bottle through the tube 60, and the inside of the PET bottle does not become a negative pressure. When the water in the plastic bottle is reduced by supplying water, the weight near the bottom of the plastic bottle is reduced. For this reason, the spring 38 which has been pressed is extended, and gradually lifts the portion near the bottom of the plastic bottle upward in the window-shaped support portion 36 which is vertically long.
This gradually increases the inclination of the PET bottle. These movements prevent the water pressure from decreasing and prevent the water supply from decreasing. FIG. 6 shows a mechanism using a compression spring, but a mechanism using a tension spring or a leaf spring can obtain the same effect. Similar results can be obtained by using elastic rubber instead of the tension spring. Rubber straps can be manufactured at a lower cost than springs. If a tension spring or a rubber string is used, the tension spring or the rubber string will be located at the top of the plastic bottle. (F) FIG. 7 is a sectional view for explaining an example of the device of the present invention. The PET bottle 42 is held on a support 43.
The PET bottle 42 is placed almost stably by the window-shaped support portion 45 positioned lower and the window-shaped support portion 44 positioned higher on the support base 43. Window-shaped support portion 44 of support base 43
A hole 48 is made in the upper part, through which the string 46 passes. A weight 50 is attached to an end of the string 46.
A horizontal bar 47 is attached to the other end of the string 46 and stops at a knot 49 of the string. The weight 50 pulls the string 46 through the hole 48 in an attempt to descend by gravity. This force becomes a force for lifting the horizontal bar 47 upward. Although FIG. 7 is a cross-sectional view, only the other side of the apparatus is drawn, but the weight 50, the hole 48, the string 46, the string knot 49
The horizontal bar 47 receives a force to be lifted upward by a string and a weight from both sides. The portion of the PET bottle closer to the bottom than the neck is pushed up by the horizontal bar 47. In FIG. 7, the plastic bottle is sufficiently filled with water and heavy, and the portion near the bottom of the plastic bottle is in contact with the support base 43. The position of the water surface is at a water surface position 51.
The water in the PET bottle oozes out of the string 73 passed through the special plug 52 as a minute flow due to gravity and capillary action and is supplied to the soil 53. Air outside the container flows into the portion near the bottom inside the PET bottle through the tube 61, and the inside of the PET bottle does not become a negative pressure. When the water in the plastic bottle is reduced by supplying water, the weight near the bottom of the plastic bottle is reduced. Because of this, the horizontal bar 47 that was
Gradually lifts the portion near the bottom of the PET bottle upward in the window-like support portion 44 that is long vertically opened. This gradually increases the inclination of the PET bottle. These movements prevent the water pressure from decreasing and prevent the water supply from decreasing. (G) FIG. 9 is a perspective view showing a use state of the water supply device using the special tap of FIG. The plastic bottle 62 is filled with water and passes through the string 69 of the special plug 74 to the soil 71,
Water is supplied to the plant 70. The air outside the container flows into the portion near the bottom inside the plastic bottle through the tube 63, and the inside of the plastic bottle does not become a negative pressure. A front support 67 supports a portion of the PET bottle container near the neck. The front support 67 has a lower window-like support 68.
The window-shaped support portion 68 is slightly longer in the vertical direction, and the portion near the neck of the PET bottle container can be slightly moved in the vertical direction. A rear support 64 supports a portion closer to the bottom than the center of the PET bottle container. The rear support 64 has a two-stage window-shaped support located high. Lower window-like support part 65
And the upper window-shaped support portion 66. In FIG. 9, the rear support 64 and the front support 67 are manufactured by processing a thick wire, and the lower portion is embedded in the soil 71 and fixed.
When the water in the plastic bottle is reduced by water supply, the person once removes the plastic bottle, and the portion closer to the bottom than the center of the plastic bottle container is moved from the lower window-like support portion 65 to the upper window-like support. By replacing with the part 66, the inclination can be increased. This increases water pressure and water supply.
It takes time, but the structure is simple. Water supply continues even if the lower window-shaped support 65 is not replaced with the upper window-shaped support 66. In that case, the amount of water supply per unit time will decrease significantly. As a countermeasure, a large number of this device is prepared, divided into several blocks, and used when the water supply start timing is shifted, so that the lower window-like support portion 65 can be moved from the lower window-like support portion 66 to the upper window-like support portion 66. Even if the replacement is not performed, the change in the increase and decrease in the total water supply amount per unit time is small. Then, the rear support 64 in FIG. 9 only needs to have one window-shaped support portion, and the trouble of replacement is eliminated. (H) FIG. 12 is a sectional view for explaining the operation of one example of the device of the present invention. The PET bottle 79 is filled with water, and the first water surface position is the water surface position 81. The portion near the neck of the PET bottle is a window-like support portion 88 of a front support 87.
It is set in. The upper part of the support base 90 that supports a portion closer to the bottom of the plastic bottle than the front support 87 contacts the plastic bottle and supports the weight of the plastic bottle. At this time, the position of the center of gravity of the plastic bottle including water is the position of the center of gravity 8.
2. The position of the center of gravity 82 is closer to the bottom of the plastic bottle than directly above the support base 90. For this reason, the PET bottle hits the upper part of the support base 90 and the window-shaped support part 88 of the front support 87, and its weight is supported and stable. Window-shaped support 8
Reference numeral 8 is long and slender, and has a sufficient margin in the downward direction with respect to the plastic bottle, but has a small dimensional margin in the left-right direction, thereby preventing lateral displacement of the plastic bottle. The water in the plastic bottle is a special stopper 86
And oozes out as a small flow due to gravity and capillary action and is supplied to the soil 85. Air outside the container flows into the portion near the bottom inside the plastic bottle through the tube 80, and the inside of the plastic bottle does not become a negative pressure. The height of the water surface is reduced by water supply, the water pressure is reduced accordingly, and the amount of water supply per unit time decreases. When the position of the water surface reaches the water surface position 83, the position of the center of gravity of the entire PET bottle becomes the position of the center of gravity 84, and the position of the center of gravity 84 is slightly closer to the neck of the PET bottle than directly above the support base 90. The PET bottle is supported by the upper part of the support base 90,
It rotates in the direction in which the inclination becomes larger. The window-shaped support portion 88 is long and thin and has room below, so that this operation is not hindered. As the inclination increases, the water pressure also increases, and the amount of water seeping from the string 89 to the soil 85 also increases, as described with reference to FIG. (I) FIG. 8 is a sectional view showing a special lid used in the device of the present invention. In the above description, a special stopper is attached to the mouth of the PET bottle. However, the same effect can be obtained by using a special lid having a structure as shown in FIG. 8 instead of the special stopper. A protruding portion 55 of the body portion 54 of the lid is provided with a hole through which a string 56 made of a fibrous substance and a tube 92 pass. A similar effect can be obtained by passing an elongated, slightly water-permeable substance into the hole instead of the string 56. Tube 92
Is equivalent to the tube 14 described in FIG.
However, in FIG. 8, the string 56 and the tube 9 are placed in the same hole.
2 passes. The gasket 58 is used to prevent leakage, and is attached to the plastic bottle with the screw portion 57. FIG. 11 is a sectional view showing a special plug used in the apparatus of the present invention. Figure 2 shows the basic structure in which a hole is made in the body of the stopper and a string passes through it.
Is the same as A metal pipe 76 is passed through a hole formed in the main body portion 75 of the stopper, and a string 7 is passed through the metal pipe 76.
7 passes through and the tube 78 covers. The function is the same as that of the stopper described with reference to FIG. 2, but the precision of the hole diameter of the metal pipe is higher than that of the hole made in the rubber stopper. Tube 93 is
This is equivalent to the tube 14 described in FIG.

[0005]

(A) Utilizing an easily available PET bottle, it has a structure for automatically increasing water pressure during water supply, and can supply water to plants even when a person is absent for a long period of time. (B) A structure that automatically increases the water pressure during water supply without a large facility in a desert or other dry land allows water to be automatically supplied for a certain period of time, and allows cultivation of water-saving agricultural crops. Easy to move and less burial by sandstorm. (C) The structure is simple and can be handled by children. (D) Efficient use of discarded or recycled PET bottles, and inexpensive equipment.

[0006]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of the device of the present invention.

FIG. 2 is a sectional view of a special plug used in the device of the present invention.

FIG. 3 is a sectional view for explaining the operation of the device of the present invention.

FIG. 4 is a sectional view for explaining the operation of the device of the present invention.

FIG. 5 is a sectional view illustrating an example of the device of the present invention.

FIG. 6 is a cross-sectional view illustrating an example of the device of the present invention.

FIG. 7 is a sectional view illustrating an example of the device of the present invention.

FIG. 8 is a sectional view of a special lid used in the device of the present invention.

FIG. 9 is a perspective view showing a use state of a water supply device using a special tap.

FIG. 10 is a graph illustrating the performance of the device of the present invention.

FIG. 11 is a sectional view of a special plug used in the device of the present invention.

FIG. 12 is a sectional view illustrating an example of the device of the present invention.

[Explanation of symbols]

 1: Plant 2: Pet pot 3: Tube 4: Water surface position 5: Rear support 6: Window support 7: Front support 8: Window support 9: Intermediate fulcrum material 10: Special plug 11: String 12 : Body part of stopper 13: String 14: Tube 15: Water surface position 16: Center of gravity position 17: Water surface position 18: Center of gravity position 19: Sat 20: Water surface position 21: PET bottle 22: Holder 23: Shaft 24: Base 25: Window-like support part 26: String 27: Window-like support part 28: Water surface position 29: Center of gravity position 30: Water surface position 31: Center of gravity position 32: Special plug 33: Soil 34: PET bottle 35: Support base 36: Window shape Of support 37: window-shaped support 38: spring 39: special plug 40: soil 41: water surface position 42: plastic bottle 43: support base 44: window-shaped support 45: window-shaped support 46: string 47 : Horizontal bar 48: Hole 49: Knot 50: Weight 51: Water surface position 52: Special plug 53: Soil 54: Lid body 55: Projection 56: String 57: Screw 58: Gasket 59: Tube 60: Tube 61: Tube 62: PET bottle 63: Tube 64: Rear support 65: Lower window-like support 66: Upper window-like support 67: Front support 68: Window-like support 69: String 70: Plant 71: Soil 72: String 73: String 74: Special plug 75: Main body of plug 76: Metal pipe 77: String 78: Tube 79: PET bottle 80: Tube 81: Water surface position 82: Center of gravity 83: Water surface position 84: Center of gravity 85: Sat 86: Special plug 87: Front support 88: Window-like support 89: String 90: Support base 91: Tube 92: Tube 93: Tube X: Height Y: Height W: Height

Claims (4)

[Claims] (A) A structure in which a fibrous string or a substance that allows water to pass through is passed through a hole formed in a main body of a stopper or a lid. (B) Pass the tube through the hole made in the body of the stopper or lid. One end of the tube extends out of the container and the other end is located in the container near the bottom. (C) It has a lower mechanism for supporting a portion near the neck of the plastic container, and a higher mechanism for supporting a portion closer to the bottom than the center of the plastic container. A mechanism is provided between the two to support the center of the plastic container and allow the plastic container to rotate about this point. The water supply device using the plastic container for drinks called PET bottles configured as described above. (2) A structure in which a fibrous string or a substance that allows water to pass through is passed through a hole formed in the main body of the stopper or lid. (B) Pass the tube through the hole made in the body of the stopper or lid. One end of the tube extends out of the container and the other end is located in the container near the bottom. (C) A mechanism (22) for holding the plastic container is provided. (22) can be rotated around (23) while holding the plastic container. The rotational force is characterized by being generated by a change in the amount of water in a plastic container. The water supply device using the plastic container for drinks called PET bottles configured as described above. (A) A structure in which a fibrous string or a water-permeable substance is passed through a hole formed in the main body of the stopper or lid. (B) Pass the tube through the hole made in the body of the stopper or lid. One end of the tube extends out of the container and the other end is located in the container near the bottom. (C) It has a lower mechanism for supporting a portion of the plastic container near the neck. It has a mechanism for lifting a portion of the plastic container closer to the bottom with a spring or rubber, or a mechanism for lifting a portion of the plastic container closer to the bottom with a weight using a weight. The water supply device using the plastic container for drinks called PET bottles configured as described above. (A) A structure in which a fibrous string or a substance that allows water to pass through is passed through a hole formed in the main body of the stopper or lid. (B) Pass the tube through the hole made in the body of the stopper or lid. One end of the tube extends out of the container and the other end is located in the container near the bottom. (C) A mechanism for supporting a portion near the neck of the plastic container, and a mechanism (90) for supporting a portion closer to the bottom of the plastic container than that position, and the plastic container can rotate around this point. . The water supply device using the plastic container for drinks called PET bottles configured as described above.