JPH0238205Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a kerosene heater that can supply kerosene by combining a separate fuel tank with the stove body. When screwing the cap into the receiver, the operator can tell whether the screw is sufficiently screwed in or not.

(Prior art) The cap of the fuel tank of a kerosene heater is a lid that prevents kerosene from leaking inside the tank.
As shown in the figure, a female thread 4 is formed on the cap 1, and a male thread 5 is formed on the cap holder 3 of the fuel tank body 2.
It is common to have a structure in which the cap 1 is screwed into the cap holder 3 and attached. If the cap 1 is securely screwed into the cap holder 3 and tightened, the kerosene in the fuel tank body 2 will not leak out regardless of the attitude of the fuel tank body 2.

(Problems with the Prior Art) However, there is no guarantee that the cap will be securely screwed in. This is because it is possible that the cap may be screwed into the cap holder at an angle. This inconvenience was caused by the lack of a means to ensure that the screws of the cap and cap holder would advance straight in the axial direction when screwing the cap into the cap holder, and by the inexperience and carelessness of the operator.

Fires have also occurred due to kerosene leaking due to incorrect screw tightening.

(Means for Solving Problems) This invention aims to ensure that the cap that forms the lid is properly screwed into the cap holder of the fuel tank body, or that it is screwed in diagonally due to inexperience or carelessness on the part of the operator. This allows the handler to know at a glance how old the product is.

Specifically, the present invention is a kerosene stove that can supply kerosene by combining a separate fuel tank with the stove body, and the present invention is designed to accurately and completely attach the cap to the cap holder of the fuel tank. It is characterized by the provision of an indicator that disappears when screwed in.

With this indicator, when the cap has been screwed in accurately and completely, the operator can not only recognize the completion of screwing based on the positional relationship between the tip position on the outer periphery of the cap and the indicator, but also indicate when the screw is not fully screwed in. The operator can recognize this from the positional relationship between the tip position and the index. The indicator can be easily formed by applying a warning color such as red to the base receiver.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The illustrated embodiment provides a semi-forced guide which is not affected by the improper screwing operation of the operator.

In Figures 1 and 2, 10 is a base, 11
12 is a leakage prevention packing, 13 is a supply hole with a valve function for sending kerosene to the kerosene stove body, 14 is a guide tube of the base 10,
15 is the guide tube 14 to use up the kerosene to the end.
16 is the fuel tank body, 17 is the relief hole provided in the
is the cap holder, 18 is the male screw of the cap holder 17, 19
20 is a guide cylinder of the base holder 17, and 20 is an index provided on the base holder 17, which is formed by applying red paint, and indicates the position where the base 10 is accurately screwed into the base holder 17 and cannot be screwed in any further. When it is tightened to that point, it is covered by the outer circumference of the tip of the cap 10, but when it is not tightened that far, the cap 10 is covered.
It is provided at the base end of the base holder 17 so that it is not covered by the outer periphery of the tip. 21 is base 10
This is a filtration material attached to the guide tube 14 to provide a filtration function.

The guide tube 14 of the cap 10 is firmly attached to the cap 10, and the central axes of the female thread 11 and the guide tube 14 do not shift. That is, when the cap 10 is screwed into the male screw 18 of the cap holder 17, a concentric axis is ensured.
The guide cylinder 14 of the cap 10 is set longer than the female thread 11 thereof and the male thread 18 of the cap holder 17, and its tip has a tapered smaller diameter than the other cylindrical portions. The inner diameter of the guide tube 19 of the cap holder 17 is set to be slightly larger than the outer diameter of the guide tube 14 of the cap 10.

Next, in the above embodiment, the process of screwing the cap 10 into the cap holder 17 of the fuel tank main body 16 and completing tightening will be described.

First, when the operator screws the cap 10 into the cap holder 17 of the fuel tank body 16, the operator tries to engage the female thread 11 of the cap 10 with the male thread 18 of the cap holder 17, but at this time, The tapered portion at the tip of the guide tube 14 of the cap 10 comes into contact with the inside of the guide tube 19 of the cap holder 17 of the fuel tank body 16. During this contact, the narrow diameter portion at the tip of the guide tube 14 of the cap 10 slides into the inside of the guide tube 19 of the cap holder 17 with a slight gap. Guide tube 14 of the cap 10 that has slipped into it
The entire portion of the tip that protrudes longer than the female thread 11 is immediately guided and inserted into the guide tube 19 of the base holder 17. When this protruding portion is inserted, the center axes of the screws 11 and 18 of the cap 10 and the cap holder 17 will not deviate by more than the gap created by the difference in diameter between the guide tubes 14 and 19. Therefore, if the cap 10 is continued to be turned in the tightening direction, the female thread 11 of the cap 10 will easily and reliably engage with the male thread 18 of the cap holder 17 and be tightened. Tightening is complete, i.e.
The index position is set so that when the cap 10 is tightened to the point where it can no longer be screwed in, the indicator 20 is covered by the outer periphery of the tip of the cap 10 and becomes invisible. to inform you that the amount has reached . When the tightening is not sufficient, the indicator 20 is not covered by the outer periphery of the tip of the cap and is visible, thereby informing the operator that the tightening is insufficient.

Through the above process, the operator can easily and reliably tighten the cap 10 to the cap holder 17.

The present invention is applicable not only to the fuel tank as in the above embodiment, which is equipped with a semi-forced guide section that is not affected by the inappropriateness of the screwing operation by the operator, but also to fuel tanks that are not equipped with such a guide section, for example. , it goes without saying that this can be carried out with respect to the conventional fuel tank shown in FIG.

(Effects) As described above, according to the present invention, the operator can tell at a glance whether the cap is screwed into the cap holder correctly or whether it is screwed in diagonally due to the operator's inexperience or carelessness. can know,
This eliminates oblique screwing of the cap, and as a result, prevents fires caused by kerosene leakage.

Further, the structure of the present invention is simple and can be implemented without changing the structure of the conventional cap and cap holder, and has high added value in terms of manufacturing cost. Moreover, since the present invention has a simple structure, it has the advantage that there is almost no deterioration even after repeated use over a long period of time.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a partially cutaway front view of the fuel tank with the base removed, and Figure 2 is the state with the base attached. FIG. 3 is a partially cutaway front view of the fuel tank in FIG. FIG. 3 is a partially cutaway front view showing the structure of the cap and cap holder of a conventional fuel tank. 10...Cap, 16...Refueling tank body, 17
...Case holder, 20...Indicator.

Claims (1)

[Scope of utility model registration request] In kerosene heaters that can supply kerosene by combining a separate fuel tank with the stove body, there is an indicator on the base of the fuel tank that becomes invisible when the base is screwed in correctly and completely. A refueling tank for an kerosene stove, which is characterized by the following: