JP2008257869A - Oil storing container, float object, and oil float set equipped with them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil receiving container capable of improving the flexibility of design, and continuing stable combustion, and superior in the functionalities and safety, and to provide a float body, and an oil float set equipped with them. <P>SOLUTION: An opening part 2 is formed in the side of a hollow oil-receiving container, the upper part of the container is opened and has a receiving region for receiving oil, in the lower end region of the opening part. The float body 10 is floated in the hollow oil-receiving container. A combustion wick 11 is inserted in the float body, and the float body is floated inside the oil-receiving container 1 by a plurality of shapes of projecting parts and recessed parts provided around the combustion wick 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oil container, a float body, and an oil float set including these, which burn and heat liquid fuel to perform heating and heat insulation. The present invention also relates to an oil storage container, a float body, and an oil float set including these that can be used as an interior as a light using a flame generated by burning liquid fuel.

  2. Description of the Related Art Conventionally, methods for generating flames using candles, solid fuel, liquid fuel, and the like have been widely used as lights and decorations for restaurants and the like, or as simple cooking and heating methods on a table.

  These fuels have been invented and disclosed in various shapes and compositions for the purpose of obtaining a stable flame and extending the combustion time (see, for example, Patent Document 1 and Patent Document 2). .

  In addition, the use of vegetable oils in liquid fuels is becoming increasingly important from the viewpoint of environmental society, and the Agency for Natural Resources and Energy has already started research on biodiesel fuels with low flash points by methyl esterification. Therefore, the introduction of this fuel has been studied to be effective in combating global warming. Furthermore, the use of vegetable oil such as salad oil in most ordinary households as a fuel material is expected to have a great social contribution from the standpoint of ease of dissemination.

Registered Utility Model No. 3093463 See JP2003-213293A

  However, the above candle, solid fuel, liquid fuel, and the like have the following problems. That is, candles and solid fuels are solid and may not be used depending on the shape of the storage container. For this reason, in order to realize the required functions and designs, a dedicated candle and solid fuel are required, which increases the cost.

  Moreover, about liquid fuel, since alcohol and kerosene with a low flash point are mainly used, there existed a restriction | limiting in the shape of a storage container. In particular, highly volatile methyl alcohol and alcohol lamps that use ethyl alcohol must be stored in a sealed container to prevent ignition of vaporized fuel. There was a problem of requiring care in handling.

  Furthermore, in solid fuel and liquid fuel, soot and carbon monoxide are generated in an environment where the conditions for combustion such as the shape of the core, the composition of the fuel, the oxygen concentration, the temperature, etc. are not prepared, It was difficult to continue stable combustion.

  The present invention has been made in order to solve such problems, and can improve the design, and has excellent functionality, safety, and oil storage capable of continuing stable combustion. It aims at providing a container, a float body, and an oil float set provided with these.

  In order to solve the above problems, the present invention provides the following.

  (1) A hollow oil storage container having an open top, wherein an opening is formed in a side surface, and an oil storage container having a storage region in which oil is stored in a lower end region of the opening.

  According to the present invention, a hollow oil storage container having an open top, an opening is formed on a side surface, and a storage region in which oil is stored is provided in the lower end region of the opening. In addition, stable combustion can be maintained without generating carbon monoxide. That is, by forming an opening for ventilation on the side surface of the oil storage container, a sufficient amount of oxygen is supplied from the opening to replenish oxygen consumed by combustion. Since incomplete combustion does not occur, stable combustion can be maintained without generating soot and carbon monoxide.

  (2) The oil storage container according to (1), wherein a protrusion toward the top is provided on the peripheral surface of the storage region, and the storage region is divided.

  According to the present invention, the peripheral area of the accommodation area is provided with a protrusion toward the upper part, and the accommodation area is divided, so that by providing a heat source in each of the divided accommodation areas A plurality of heat sources can be burned simultaneously to increase the amount of heating.

  Moreover, since different oil can be accommodated in each of the divided accommodation regions, the heating amount can be varied.

  (3) The oil container according to (1) or (2), wherein a convex portion is formed on the outer peripheral surface side of the upper portion and a concave portion is formed on the inner peripheral surface side of the upper portion.

  According to the present invention, the convex portion is formed on the outer peripheral surface side of the upper portion, the concave portion is formed on the inner peripheral surface side of the upper portion, and the top plate is installed in the concave portion by having the concave and convex upper portion. Can do. By installing a top plate on the top of the oil storage container, it is possible to place a container with an object to be heated on the top plate, and the heat source (flame) in the storage container is combustible from the outside. The substance can be prevented from coming into contact.

  (4) The oil container according to any one of (1) to (3), wherein the outer peripheral surface and / or the inner peripheral surface is curved.

  According to the present invention, since the outer peripheral surface and / or the inner peripheral surface of the oil container are curved, air can be efficiently convected and stable combustion can be maintained.

  (5) A float having an insertion hole for inserting the combustion core and a plurality of protrusions provided around the insertion hole on the surface, and a recess provided on the back surface forming the protrusion. body.

  According to the present invention, the front surface has the insertion hole for inserting the combustion core and the plurality of projections provided around the insertion hole, while the recess for forming the projection is provided on the back surface. Stable combustion can be maintained by the produced float body. That is, the float body is stably floated on the liquid fuel by the protrusion provided on the surface of the float body and the buoyancy of the air in the recess provided on the back surface, and the combustion core is inserted into the insertion hole. Thus, the combustion core is stably held, and liquid combustion is supplied to the combustion core from between the protrusions on the surface of the float body, so that stable combustion can be maintained.

  (6) The float body according to (5), wherein a reference surface that divides the front surface and the back surface is formed in an uneven shape.

  According to the present invention, since the reference surface that divides the front surface and the back surface of the float body is formed in an uneven shape, the liquid fuel flows smoothly from the concave portion to the combustion core, thereby stabilizing Combustion can be maintained.

  (7) A float body in which a plurality of float bodies (5) or (6) are integrally formed.

  According to the present invention, a plurality of the float bodies are integrally formed to form a float body having a plurality of combustion cores, whereby the fuel supplied to the plurality of combustion cores can be burned simultaneously, and the heating amount Can be increased.

  (8) An oil float set comprising: the oil container according to any one of (1) to (4); and the float body according to any one of (5) to (7).

  According to the present invention, by using an oil float set including the oil storage container according to any one of (1) to (4) and the float body according to any one of (5) to (7), Stable combustion can be maintained without generating soot or carbon monoxide.

  As described above, according to the present invention, an oil storage container, a float body, which can improve design, is excellent in functionality and safety, and can continue stable combustion, and An oil float set provided with these can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an oil float set according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the configuration thereof.

  The oil float set shown in FIGS. 1 and 2 includes an oil storage container 1 and a float body 10. The upper part of the oil container 1 is opened, and an opening 2 is formed on the side surface. On the liquid level of the liquid fuel 3 stored in the oil storage container 1, the float body 10 with the combustion wick 11 inserted is supported in a floating state. 1 and 2 show a state in which the combustion core 11 is ignited for reference.

  As the liquid fuel 3, one having a low volatility and a low flash point can be used. For example, vegetable oils such as salad oils that are commonly used in general households can be used. Essential oils can also be used.

Here, as the oil storage container 1 having the opening 2 capable of supplying sufficient oxygen, a plurality of openings 2 having at least 9 cm ² , preferably 12 cm ² or more are provided. In addition, when the upper opening area of the oil storage container 1 is 30 cm ² or less, the position where the opening is provided is desirably provided at the lower end of the opening 2 about 40 mm from the lower surface of the oil storage container 1. That is, 40 mm is desirable as the height direction of the accommodation area in which the oil is accommodated. In this case, the distance from the upper part to the accommodation area surface is desirably 30 mm or more.

  Further, oil can be easily added from the opening 2. In this regard, according to the oil container 1 according to the embodiment of the present invention, compared to a conventional container such as an alcohol lamp that does not have a hole and cannot add fuel and continue combustion, Additional oil can be easily injected from the portion 2. That is, the opening 2 can function as an oxygen inlet and sometimes as a liquid fuel supply port.

[Float]
A float body according to an embodiment of the present invention will be described with reference to FIGS.

  Fig.3 (a) is a top view which shows the example of the float body 10 which concerns on embodiment of this invention. 3B is a cross-sectional view when FIG. 3A is cut along the plane X, and FIG. 3C is a cross-sectional view when FIG. 3A is cut along the plane Y. FIG. FIGS. 3B and 3C show a state where both float on the liquid surface.

  In FIG. 3, the float body 10 includes an insertion hole 12 for inserting the combustion core 11. The float body 10 has a plurality of protrusions 13 around the insertion hole 12, and a protrusion on the outer side. It has a convex portion 15 that protrudes lower than the portion 13.

  A recess 14 is provided on the back surface of the protrusion 13, and the float body 10 is stably floated by the buoyancy of air in the recess 14. The liquid fuel 3 flows in from between the protrusions 15, passes between the protrusions 13, and is continuously supplied to the combustion core 11 inserted into the insertion hole 12. The fuel supply to the combustion wick 11 is more stable when the combustion wick 11 is disposed through the float 10 and supplied at the upper surface side of the float 10 than when the liquid fuel 3 is supplied from below. To do. Furthermore, the liquid fuel 3 is supplied more stably by providing the float 10 with an inclination toward the combustion core 11.

  FIGS. 3D to 3F are enlarged views of the Z portion of FIGS. 3B and 3C. FIG. 3D is a cross-sectional view, and FIGS. 3E and 3F are upward views. It is an external view. The float body 10 is provided with an inclination toward the insertion hole 12 into which the combustion core 11 is inserted (FIG. 3 (d)). The inclination may be provided with one or a plurality of inclined grooves as shown in FIG. 3 (e), or may be provided with a funnel-like inclination as shown in FIG. 3 (f). Due to these inclinations, the liquid fuel 3 can easily flow into the combustion core 11, and more stable combustion can be maintained.

  A combustion core 11 having a diameter of 3 mm or less is used, and the length of the portion exposed from the liquid fuel surface is adjusted to be 30 mm or less. By adjusting the balance between the thickness and length of the lead, generation of soot and carbon monoxide due to incomplete combustion can be prevented.

  The float body 10 may have a shape including a plurality of combustion cores 11. A plurality of combustions can be obtained simultaneously by the plurality of combustion cores 11, and the amount of heating can be increased.

  FIG. 4 is a plan view illustrating an example of a float body including a plurality of combustion cores. 4A shows a 3-core type float body, and FIG. 4B shows a 4-core type float body.

  In FIG. 4, the three-core float body 16 includes three combustion cores 11 and the four-core float body 17 includes four combustion cores 11. The float bodies 16 and 17 each have a plurality of protrusions 13 around the insertion hole 12 into which the combustion core 11 is inserted, and a recess 14 on the back surface thereof. The interval between the adjacent combustion cores 11 is set to 20 mm or more. In the case where a plurality of combustion wicks are provided in the same float body, oxygen can be supplied smoothly by setting the interval between the combustion wicks to 20 mm or more.

  The shape of the float body 10 is not limited to the above-described form, and any material or shape can be used as long as it floats on the liquid fuel and can stably hold the fuel core and maintain combustion. Does not matter. For example, a shape as shown in FIGS. 10A to 10D can be used. Here, FIG. 10A is a substantially triangular shape, FIG. 10B is an elliptical shape having a longitudinally long axis, FIG. 10C is a substantially trapezoidal shape, and FIG. 10D is an elliptical shape having a laterally long axis. . In order to obtain stable combustion, it is better to have a simple shape and a structure in which liquid fuel smoothly flows into the combustion core.

[Oil storage container]
An oil container according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 is a side view and a cross-sectional view showing an example of the oil storage container 1 according to the embodiment of the present invention.

  In FIG. 5, the oil storage container 1 has a hollow shape with an open top, and has a shape in which an inner peripheral surface and an outer peripheral surface are curved, and an opening 2 is formed on a side surface. A convex portion 4 is formed on the outer peripheral surface side of the upper portion of the oil storage container 1, and a concave portion 5 is formed on the inner peripheral surface side of the upper portion, and a top plate can be installed in the concave portion.

  For the oil container 1, for example, a material such as metal or ceramics can be used. Further, according to the embodiment of the present invention, when the position of the flame can be set accurately, it is possible to use a resin container such as a polypropylene container or a heat-resistant PET container. That is, if the flame can be stabilized at a position sufficiently away from the wall of the container, the influence of heat received by the container can be minimized, and therefore a resin container having low heat resistance can be used. Further, when alcohol, kerosene, or the like is used as the liquid fuel, the resin may be melted or swelled, and thus the resin container cannot be used. However, according to the embodiment of the present invention, the liquid fuel Since vegetable oil can be used as the resin and the resin is not damaged, a resin container can be obtained.

  The opening 2 is formed as a vent that supplies sufficient oxygen to maintain stable combustion and prevent soot generation. The position and shape of the opening 2 are not limited to the form shown in FIG. 5, and may not be in contact with the upper end of the oil container 1, and may be any shape such as a circle, an ellipse, or a rectangle. However, as for the size, it is desirable that the ratio (opening ratio) A% of the area of the opening 2 to the side area is set to a predetermined ratio or more. In this embodiment, about 60% is secured, but it is desirable to secure at least 30% or more.

  The opening ratio A% is obtained by the following calculation formulas (1) to (3). Formula (1): St = (2 × π × r) × H (where, St: the side surface area of the oil container 1 above the highest liquid level W of the liquid fuel (the hatched portion in FIG. 5C)) Calculation formula (2): So = (area of one opening) × number of openings (where So: opening area of side surface), calculation formula (3): A = So / St × 100

  Further, by providing the oil container 1 with an inclination as shown in FIG. 11, more stable combustion becomes possible. The opening width Wo is represented by the following calculation formula (4): Wo = H · tan θ. When the diameter Dv of the oil container 1 is smaller than H, ideally θ = 30 ° or more is desirable, but it is desirable to ensure at least θ = 15 °.

  Furthermore, when the opening 2 is not provided, it is necessary to provide a large upper opening portion of the oil storage container 1 so that sufficient oxygen can be supplied.

  Next, a method of installing and using a top plate in the oil storage container will be described with reference to FIG.

  FIG. 6 is an explanatory diagram for explaining a method of installing and using a top plate in the oil storage container 1.

  In FIG. 6A, a top plate 20 is installed in the upper concave portion 5 of the oil storage container 1, and a container 21 containing an object to be heated is placed on the top plate 20. By installing the top plate 20, it is possible to heat a container or the like on the oil storage container 1 and to prevent the combustible substance from coming into contact with the flame in the oil storage container 1 from the outside. be able to.

  As long as the top plate 20 shown in FIG. 6A can withstand the heat generated by combustion, any material may be used in accordance with the purpose of use. For example, a top plate made of metal, earthenware, heat-resistant glass or the like can be used. Further, when the flame position can be accurately set according to the embodiment of the present invention, a resin top plate can be used.

  6B to 6C show examples of the shape of the top board 20. A top plate 20a shown in FIG. 6 (b) is a plate-like top plate having no opening. By not providing the opening portion, it is possible to prevent the burning flame from coming into contact with the container 21 on the top board. However, since the upper opening of the oil storage container 1 is completely blocked, it becomes difficult to perform exhaust after combustion from the upper part, and it becomes difficult to supply oxygen. In order to cope with this, it is necessary to provide a sufficiently large opening on the side surface of the oil container 1.

  The top plate 20b shown in FIG. 6 (c) is provided with a large number of openings so as to minimize heat loss due to heat conduction to the top plate and more effectively heat the container 21 on the top plate. be able to. That is, since the container 21 on the top plate is directly heated without receiving the high temperature generated from the flame by the top plate, the resin oil storage container 1 such as polypropylene or the resin top plate 20 can be used. The cooking container 21 such as a pan placed on the top can be heated. However, since there is nothing to block between the flame and the container 21, it is necessary to set the position and size of the flame accurately.

  The top plate 20c shown in FIG. 6 (d) is provided with an opening only around the top plate, thereby suppressing heat loss due to heat conduction to the top plate and avoiding direct heating from the flame. . Since the container 21 on the top plate is heated by heat conduction from the top plate, it is possible to use a polypropylene container or a resin container such as a heat-resistant PET container.

  If the container 21 used for heating is a metal or earthenware container usually used for heating, or a top plate having no opening at the center, such as the top plate 20a or the top plate 20c described above, it is made of resin. Containers can be used.

  Next, a method using a plurality of float bodies will be described with reference to FIG.

  FIG. 7 is a plan view and a cross-sectional view for explaining an oil storage container for using a plurality of float bodies.

  In FIG. 7, the oil storage container 30 is provided with a protruding portion 32 on the peripheral surface of the storage region 31 and directed upward, and the storage region 31 is divided with the central portion connected as shown in FIG. Each of them is provided with a float body 10. With the plurality of float bodies 10, a plurality of combustions can be obtained simultaneously, and the heating amount can be increased.

  In addition, the shape of the oil storage container 30 is not limited to the above-described form, provided that a divided storage region that can include a plurality of float bodies is provided and oxygen supply can be sufficiently performed. Any shape is acceptable.

  Next, a method using a large amount of liquid fuel will be described with reference to FIG.

  FIG. 8 is a cross-sectional view and a plan view for explaining a large-capacity oil storage container using a float guide.

  In FIG. 8A, the oil storage container 40 has a larger storage area than the standard oil storage container as described above, and can store a large amount of liquid fuel 3. By changing the upper opening and enlarging the volume without changing the depth of the storage area, it is possible to minimize the fluctuation of the liquid level due to the mass consumption of the liquid fuel 3.

  However, when the above-described large-capacity oil storage container 40 is used, the upper opening is widened, so that the floating range of the float body 10 is widened and stable combustion cannot be obtained. Therefore, it is necessary to provide the float guide 41 so that the float body 10 does not change its position.

  That is, an oil float provided with a fuel core has a property that the position of a flame generated by combustion becomes unstable due to its property when floating. Specifically, if the position of the flame becomes unstable as a result of horizontal position fluctuations due to convection, or vertical position fluctuations of the float floating liquid surface as the oil decreases, the position of the strong heating point also changes. It becomes unstable. Such destabilization of the flame position may cause soot or lead to incomplete combustion, and in some cases, the flame may disappear.

  Therefore, by restricting the horizontal position fluctuation by the float guide 41, oxygen supply from the side surface of the oil container 40 can be appropriately performed.

  8B shows an oil storage container 40 provided with a three-point support type, and FIG. 8C shows a four-point support type float guide. The float guide 41 is installed in the oil container 40, and the gap between the float body 10 and the float guide 41 is set to be small (usually 10 mm or less, 5 mm or less in the case of a three-point support type). It is possible to reduce the position variation to The number and shape of the float guides 41 are not limited to those illustrated in FIG. 8, and may be any as long as the position variation of the float body 10 can be reduced. Further, as shown in FIG. 8D, by designing the float guide 41 to be high, a container or the like may be placed on the top without using a top plate.

  The float guide 41 may be attached to the oil storage container 40 to be used when the range in which the float body 10 floats becomes wide, or may be incorporated at the stage of manufacturing the large-capacity oil storage container 40.

[how to use]
A method of using the oil float set according to the embodiment of the present invention will be described with reference to FIG.

  FIG. 9 is an explanatory diagram for explaining a method of using the oil float set according to the embodiment of the present invention. FIG. 9A shows a state immediately after the start of combustion, and FIG. 9B shows a state in which the combustion proceeds and most of the liquid fuel 3 is consumed.

  In FIG. 9, in order to use the oil float set according to the embodiment of the present invention, first, the liquid fuel 3 is injected into the oil container 1, and the float body in which the combustion core 11 is inserted into the liquid surface. 10 is levitated. At this time, water 6 may be injected before liquid fuel 3 is injected. When there is a protrusion due to the insertion hole for inserting the combustion core 11 on the back surface of the float body 10, when the liquid fuel 3 is consumed by combustion and the liquid level is lowered, the float body 10 is inclined by the protrusion. End up. If the water 6 is accommodated at such a depth that the float body 10 does not tilt under the liquid fuel 3, the float body 10 can be stably floated even if the liquid fuel 3 is consumed (FIG. 9 (b)), the liquid fuel 3 can be burned out safely. Here, the liquid stored under the liquid fuel 3 is not limited to the water 6, and any liquid that does not mix with the liquid fuel 3, has a higher specific gravity than the liquid fuel 3, and does not burn can be used. .

  Next, the combustion core 11 is ignited and combustion is started (FIG. 9A). As combustion progresses, the liquid fuel 3 is consumed and the liquid level decreases (FIG. 9B). Here, when it is desired to continue combustion, the liquid fuel 3 can be additionally injected from the opening 2 shown in FIG. In a conventional alcohol lamp or the like, the container for liquid fuel is sealed, and liquid fuel cannot be added while maintaining combustion, but according to the oil float set according to the embodiment of the present invention, The liquid fuel 3 can be easily supplied from the wide opening 2 provided in the oil storage container 1, and combustion can be continued.

[Liquid fuel]
In the oil container, the float body, and the oil float set including these according to the embodiment of the present invention, vegetable oil such as salad oil having low volatility and low flammability is used as the liquid fuel.

  The flash point of methyl alcohol and ethyl alcohol used in alcohol lamps is 32 ° C. or lower, while the flash point of vegetable oils including salad oil is as high as 240 ° C. or higher. Therefore, the risk of accidental ignition is very low and it can be handled safely.

  In order to use a vegetable oil or the like having a high flash point as a fuel, it is necessary to heat the fuel to the flash point temperature and ignite and burn it. According to the float body according to the embodiment of the present invention, liquid fuel is burned. By sucking up with the wick, fuel and oxygen are supplied in a well-balanced manner and can be ignited and burned. Further, in order to maintain stable combustion without generating soot and carbon monoxide after starting combustion, it is necessary to supply fuel stably and supply sufficient oxygen continuously. According to the oil float set according to the embodiment of the present invention, the fuel can be stably supplied by the float body, and sufficient oxygen can be continuously supplied by the oil storage container having the opening. Therefore, stable combustion can be maintained without generating soot or carbon monoxide.

  Therefore, according to the oil storage container, the float body, and the oil float set including these according to the embodiment of the present invention, it is possible to safely use vegetable oil such as salad oil having low volatility and low flammability. , Stable combustion can be obtained. In addition, since vegetable oil such as salad oil is used in every household, it is inexpensive, easy to handle and safe. Furthermore, by using vegetable oil that is liquid and highly safe, the shape of the oil container can be freely designed, and an oil float set or the like with high design can be provided.

  The oil storage container, the float body, and the oil float set provided with these according to the present invention can improve design, have excellent functionality and safety, and can continue stable combustion. The present invention is useful as an oil storage container, a float body, and an oil float set including these.

It is a perspective view which shows the oil float set which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the oil float set which concerns on embodiment of this invention. It is explanatory drawing which shows the example of the float body which concerns on embodiment of this invention. It is a top view which shows the example of the float body provided with a some combustion core. It is explanatory drawing which shows the example of the oil storage container which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the method of installing and using a top plate in an oil storage container. It is explanatory drawing for demonstrating the oil storage container for using a some float body. It is explanatory drawing for demonstrating the large capacity | capacitance type oil storage container using a float guide. It is explanatory drawing for demonstrating the usage method of the oil float set which concerns on embodiment of this invention. It is a top view which shows the other Example of a float body. It is explanatory drawing for demonstrating the shape of an oil storage container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil container 2 Opening part 3 Liquid fuel 4 Upper convex part 5 Upper recessed part 6 Water 10 Float body 11 Combustion core 12 Insertion hole 13 Projection part 14 Recessed part 15 Convex part 16 Three-core type float body 17 Four-core type float body 20 Top plate 20a, 20b, 20c Top plate (example of shape)
21 Containers to be heated 30 Oil storage containers (multiple types)
31 Storage Area 32 Projection 40 Oil Storage Container (Large Capacity Type)
41 Float guide

Claims (8)

A hollow oil storage container with an open top,
An oil storage container, characterized in that an opening is formed on a side surface and a storage area in which oil is stored in a lower end area of the opening.   The oil storage container according to claim 1, wherein a protruding portion directed upward is provided on the peripheral surface of the storage region, and the storage region is divided.   The oil storage container according to claim 1 or 2, wherein a convex portion is formed on the outer peripheral surface side of the upper portion and a concave portion is formed on the inner peripheral surface side of the upper portion.   The oil container according to any one of claims 1 to 3, wherein the outer peripheral surface and / or the inner peripheral surface is curved. While having on the surface an insertion hole for inserting the combustion core, and a plurality of protrusions provided around the insertion hole,
The float body in which the recessed part which forms the said projection part was provided in the back surface.   6. The float body according to claim 5, wherein a reference surface that divides the front surface and the back surface is formed in an uneven shape.   A float body in which a plurality of the float bodies according to claim 5 or 6 are integrally formed. An oil float set comprising: the oil storage container according to any one of claims 1 to 4; and the float body according to any one of claims 5 to 7.