JP5391533B2 - Cartridge tank - Google Patents

Description

  The present invention relates to a structure of a fuel filler cap attached to a fuel filler of a cartridge tank that supplies fuel to a liquid fuel combustion apparatus.

  A cartridge tank type oil combustor has a bottomed cylindrical oil receiver that attaches a cartridge tank to the upper surface of an oil tank arranged in a frame body, while an oil supply port provided in the cartridge tank has an on-off valve. When the lid is attached, the cartridge tank is turned over, and the oil supply lid is attached to the oil receiver, the protrusion provided on the bottom of the oil receiver pushes the open valve on the oil supply cover open to supply the fuel from the cartridge tank to the oil tank. When the bottom end of the palate and the oil level in the oil receiver coincide, the outflow of kerosene stops. When the fuel is used by combustion and the oil level in the oil tank is lowered, air enters the cartridge tank from the on-off valve, the fuel in the cartridge tank flows out, and the oil tank is held at the constant oil level. .

When the cartridge tank is empty due to the consumption of fuel due to the use of the combustor, the cartridge tank is taken out of the frame and carried to a fuel storage location such as a plastic tank, and the fuel filler cap attached to the fuel filler of the cartridge tank The fuel is supplied to the oil tank by attaching the oil filler cap to the full cartridge tank and mounting it over again in the frame (see Patent Document 1).
JP-A-10-160156

  By the way, since the tip of the oil filler lid provided with the on-off valve is located near the oil level in the oil tank, fuel adheres to the valve seat of the on-off valve at the tip of the oil filler lid and its surroundings. If the cartridge tank is removed from the frame and the refueling port cover side is facing upward, the fuel adhering to the refueling port cover will also adhere to the outer surface of the refueling port cover along the side surface of the refueling port cover. When you put on and take off the palate, the fuel sticks to your hand and you feel uncomfortable.

  In addition, plastic tanks are often stored in places where the temperature is lower than rooms that use oil combustors such as the entrance and outdoors, and cartridge tanks that are replenished with fuel at such low temperatures are used. When brought into the room, the internal pressure of the cartridge tank increases, so that when the cartridge tank is attached to the oil tank and the on-off valve is pushed open, fuel may be ejected vigorously and scattered in the oil receiver. When the fuel scatters in the oil receiver, a large amount of fuel adheres to the outer surface of the fuel filler lid, and the top of the cartridge tank around the fuel filler lid may be soiled.

  If fuel is attached to the fuel filler lid as described above, the fuel filler lid will be tightened while being concerned about dirt on the hands, and the installation force of the fuel filler lid will be loosened due to insufficient force to screw the fuel filler lid. It may be forcibly screwed while the palate is tilted, and if the cartridge tank is overfitted with the refueling pawl tightened insufficiently, the cartridge tank will leak fuel, hit the combustor, and cause serious fires It may lead to an accident.

The present invention solves the above-mentioned problem. A fuel filler lid 2 is detachably attached to a fuel filler opening 1a of a cartridge tank 1 containing fuel by a detachable mechanism 3, and the cartridge tank 1 falls down to attach the fuel filler lid 2 to the oil tank. In the cartridge tank that is attached to the oil receiver 5 and the protrusion 5a of the oil receiver 5 pushes open the on-off valve 6 built in the oil filler lid 2 and supplies the fuel of the cartridge tank 1 to the oil tank 4, the oil filler lid 2 is A flange portion 2a that expands the outer diameter is formed at the end of the cartridge tank 1 on the oil filler port 1a side, and is attached to the outer peripheral edge of the flange portion 2a. 2 is provided so as to surround the outer peripheral surface of the operation portion 7, and a plurality of partition pieces 7a are formed from the inner peripheral surface of the operation portion 7 toward the center thereof. On the outer surface of A large number of spaces 8 are formed in the gap between the fuel filler cap 2 and the operating portion 7 while being in contact with each other and functioning as a reinforcing member, and the operating portion 7 has its height dimension set to the oil filler cap. 2 is set lower than the oil level of the oil receiver 5 and at a position lower than the end of the operation part 7 at a position higher than the oil level of the oil receiver 5, the inner diameter dimension on the bottom surface side is larger than the inner diameter dimension of the operation part 7. A step 5b to be thinned is formed, and when the oil filler cap 2 is mounted in the oil receiver 5, the end of the operation portion 7 is above the step 5b of the oil receiver 5 and the bottom surface of the oil receiver 5 The fuel adhering to the vicinity of the valve seat 6a of the on-off valve 6 of the fuel filler cap 2 is located outside the inner wall on the side , and goes into the space 8 and does not adhere to the operation portion 7.

  Further, the fuel filler cap 2 is provided with a step portion 2b in which the diameter in the vicinity of the valve seat 6a of the on-off valve 6 is made smaller than the diameter of the attaching / detaching mechanism 3 portion, and the operation portion 7 is provided between the flange portion 2a and the step portion 2b of the fuel filler cap 2. It is arranged so as to surround the outer surface of the fuel filler cap 2 between them, and the operating portion 7 is provided at a position away from the tip of the fuel filler cap 2 in contact with the oil surface while ensuring an easy-to-operate height dimension. At the same time, the contact area with the oil surface at the tip of the fuel filler cap 2 can be reduced, and the fuel can be prevented from adhering to the operation portion 7.

  Also, a plurality of fuel discharge holes 5 c are provided in the step 5 b of the oil receiver 5 positioned below the space 8 of the fuel filler lid 2, and the fuel adhering to the outer surface of the fuel filler 2 and the space 8 is provided in the step of the oil receiver 5. When dropped on the portion 5b, the fuel is discharged from the fuel discharge hole 5c to the oil tank 4, so that the fuel does not accumulate in the step portion 5b of the oil receiver 5.

  In the present invention, a flange portion 2a is provided with the end portion of the fuel filler cap 2 on the cartridge tank 1 side widened outward, and a cylindrical operation portion 7 surrounding the outer peripheral surface of the fuel filler cap 2 is provided on the outer peripheral edge portion of the flange portion 2a. Since the height of the operation unit 7 is set lower than the height of the oil filler lid 2, the end of the operation unit 7 is higher than the oil level when the oil filler lid 2 is attached to the oil receiver 5. The fuel is not attached to the operation portion 7. And many partition pieces 7a are provided toward the center from the inner surface of the operation part 7, and many partition pieces 7a contact | abuts the outer surface of the fuel supply lid 2, and many partitions between the fuel supply cover 2 and the operation part 7 are provided. Since the space 8 is formed, even when the fuel adhering to the vicinity of the on-off valve 6 at the tip of the fuel filler lid 2 spreads and propagates through the outer surface of the fuel filler lid 2 when refueling the cartridge tank 1, this fuel is still supplied to the fuel filler lid 2. Since it does not flow into the space 8 between the operating portion 7 and adhere to the outer surface of the operating portion 7, when attaching or detaching the fuel filler cap 2, the operating portion 7 is gripped and operated to contaminate the hand with fuel. That was gone.

  In addition, the partition 7a formed on the inner surface of the operation unit 7 is in contact with the outer surface of the fuel filler lid 2 to ensure the strength of the operation unit 7. When the operation unit 7 is gripped, the operation unit 7 is deformed. Therefore, when the fuel filler cap 2 is attached / detached, the operation portion 7 can be firmly held and operated reliably.

  Further, the fuel that has flowed into the space 8 adheres to the surface of the partition piece 7 a, the outer surface of the fuel filler lid 2, and the inner surface of the operation unit 7, and is held in the space 8 in a state of being stuck by surface tension. Therefore, the fuel does not easily flow out of the space 8, and the outer surface of the operation unit 7 is not contaminated with the fuel.

  Further, by providing a step 2b on the fuel filler lid 2 and making the diameter of the valve seat 6a in the vicinity of the valve seat 6a of the fuel filler lid 2 smaller than the diameter of the attaching / detaching mechanism 3 portion, the oil filler lid 2 has a smaller contact area with the oil surface, and the oil filler lid Since the amount of fuel adhering to the tip of the fuel tank 2 can be reduced, the amount of fuel that spreads from the tip of the fuel filler cap 2 toward the outer surface when the fuel tank lid 2 side of the cartridge tank 1 faces upward is reduced. The amount of inflowing fuel could be minimized.

  Further, by providing the stepped portion 2b on the fuel filler lid 2, the operation portion 7 can be secured from the tip of the fuel filler lid 2 that contacts the oil surface of the oil tank 4 while ensuring a height dimension that is easy to grip when the fuel filler lid 2 is attached or detached. Since it can be provided at a distant position, it is possible to reliably prevent the fuel from adhering to the operation portion 7 even if the oil level fluctuates due to the operation of the device or the continuation of combustion.

  Further, the oil receiver 5 to which the oil filler cap 2 of the cartridge tank 1 is attached is provided with a step portion 5b in which the inner diameter dimension on the bottom side is made smaller than the inner diameter dimension of the operation section 7, and the oil filler cap 2 is attached to the oil receiver 5. When the operation portion 7 is sometimes positioned above the step portion 5b of the oil receiver 5, when the fuel is ejected from the cartridge 1 and scattered in the oil receiver 5, A large amount of fuel adheres to the side surface or the step portion 2b, and a part of the fuel may reach the upper portion of the step portion 5b, but this fuel is directed into the space 8 and does not reach the outer surface of the operation portion 7. Therefore, even if the operation unit 7 is located in the oil receiver 5, the fuel does not adhere to the outer surface of the operation unit 7.

  Further, the fuel adhering to the step 2b of the fuel filler cap 2 or the space 8 falls on the step 5b of the oil receiver 5, but in the present invention, the fuel receiver 5 located below the space 8 of the fuel filler cap 2 is used. Since the plurality of fuel discharge holes 5c are provided in the step portion 5b, the fuel dropped on the step portion 5b can be returned to the oil tank 4 from the fuel discharge hole 5c. It does not accumulate on the top, and fuel does not adhere to the operation unit 7.

  The present invention will be described with reference to the embodiments shown in the drawings. Reference numeral 1 denotes a cartridge tank that is attached to an oil combustor to supply fuel, 1a is a fuel supply port that supplies and discharges fuel provided in the cartridge tank 1, and 2 is a fuel supply port. 1a is a detachable oiling cap, 3 is an attaching / detaching mechanism formed by a screw between the oiling cap 2 and the oiling port 1a, 6 is an opening / closing valve built in the oiling port lid 2, and 6a is a valve seat of the opening / closing valve 6. The on-off valve 6 has a valve shaft 6b that closes the valve seat 6a, and a valve spring 6c that presses the end of the valve shaft 6b against the valve seat 6a.

  4 is an oil tank for storing fuel supplied from the cartridge tank, 4a is an opening provided on the upper surface plate of the oil tank, 5 is a bottomed cylindrical oil receiver fitted to the opening 4a, and 5a is a bottom surface of the oil receiver 5. A protrusion 5d formed on the bottom surface of the oil receiver 5 is a fuel outlet provided around the protrusion 5a on the bottom surface of the oil receiver 5.

  When the cartridge tank 1 is mounted on the oil receiver 5 in the frame body with the fuel filler lid 2 facing downward, the protrusion 5a pushes open the on-off valve 6 so that air flows into the cartridge tank 1, and the fuel in the cartridge tank 1 is replaced instead. When the fuel is supplied to the oil tank 4 from the fuel outlet 5d of the oil receiver 5 and the oil level in the oil tank 4 reaches the tip of the on-off valve 6, air cannot flow into the cartridge tank 1, and the fuel The outflow stops. When the fuel is used by combustion and the oil level in the oil tank 4 decreases, air flows into the cartridge tank 1 from the on-off valve 6 and the fuel flows out instead, so that the oil tank 4 has a constant oil level. It is something to hold.

  When the cartridge tank 1 becomes empty due to the use of the oil combustor, the cartridge tank 1 is taken out from the frame body, transported to the place where the poly tank or the like is stored, and the oil filler lid 2 is removed to supply oil by a siphon pump or the like. However, the tip of the fuel filler cap 2 is in contact with the oil surface in the oil tank 4 and the fuel adheres. When the fuel filler cap 2 is turned upward, the fuel attached near the tip of the on-off valve 6 is refueled. Since it spreads to the side surface of the palate 2 and a hand touches the fuel when it is attached or detached, the refueling operation is very disliked.

  In addition, if fuel is attached to the fuel filler lid 2, the fuel filler lid 2 may not be tightened with a strong force due to dirt on the hand when the fuel filler lid 2 is attached, or the hand may slip due to the fuel. If the cartridge tank 1 is mounted in an overturned state with the refueling port cover 2 being incompletely attached, the refueling port cover 2 will come off from the refueling port 1a and the fuel will flow out, and will be applied to the combustor. There was a risk of a serious accident.

  The present invention solves the above-mentioned problems. 2a is a flange portion that expands the outer diameter formed at the end of the cartridge tank 1 of the fuel filler cap 2, and 7 is a cylindrical member attached to the outer peripheral edge of the flange portion 2a. The operation unit 7 is arranged so as to be larger than the outer diameter of the fuel filler lid 2 so as to surround the outer peripheral surface of the fuel filler lid 2. Can be attached and detached. 7b is an uneven surface formed on the entire outer peripheral surface of the operation unit 7, and prevents the finger from slipping by placing the finger on the uneven surface when the operation unit 7 is gripped, thereby facilitating the rotation operation. Yes.

  Further, the operation unit 7 is provided such that the height dimension thereof is lower than the height dimension of the oil filler lid 2, and when the oil filler lid 2 is mounted in the oil receiver 5, the end of the operation unit 7 is the oil filler lid 2. The fuel is not attached to the operation portion 7 at a position higher than the oil level in the vicinity of the open / close valve 6.

  Reference numeral 7 a denotes a number of partition pieces extending from the inner peripheral surface of the cylindrical operation portion 7 toward the center, and the tips of the partition pieces 7 a abut against the outer surface of the fuel filler lid 2 positioned inside the operation portion 7. The gap between the outer surface of the fuel filler cap 2 and the inner surface of the operation portion 7 is partitioned by a partition piece 7a. Reference numeral 8 denotes a space formed by two adjacent partition pieces 7 a, the outer surface of the fuel filler lid 2, and the inner peripheral surface of the operation portion 7, and there are many spaces 8 in the gap between the fuel filler lid 2 and the operation portion 7. Is formed.

  In this configuration, when the fuel filler cap 2 is turned upward to supply the fuel to the cartridge tank 1, the fuel adhering to the vicinity of the valve seat 6a at the tip of the fuel filler cap 2 spreads and flows to the outer surface of the fuel filler cap 2. The fuel is directed into the space 8 without reaching the outer peripheral surface of the operation portion 7 disposed outside the fuel filler lid 2, and the space 8 is formed by connecting the lower end of the operation portion 7 and the flange portion 2 a of the fuel filler lid 2. Since the closed bottom portion is configured, the fuel that has flowed into the space 8 can be received in the space 8, and the fuel does not adhere to the outer peripheral surface of the operation portion 7 located outside the space 8. Therefore, when attaching and detaching the fuel filler cap 2, the operation unit 7 is gripped and operated so that the hand is not contaminated with fuel.

  The fuel flowing on the outer surface of the fuel filler cap 2 adheres to the end of the partition piece 7a when going into the space 8, but the partition piece 7a has a height dimension shorter than the height dimension of the operation section 7, Since the end portion of the piece 7a is positioned lower than the end portion of the operation portion 7, the fuel attached to the end portion of the partition piece 7a can surely flow into the space 8 without getting over the operation portion 7, Fuel does not adhere to the outer surface of the operation unit 7.

  Further, when the fuel filler cap 2 is attached / detached, the operation portion 7 is strongly gripped and operated in order to securely tighten the fuel filler cap 2. Therefore, the cylindrical operation portion 7 may be crushed and deformed. Since the operation unit 7 can be prevented from being deformed by supporting the operation unit 7 by the partition piece 7a that contacts the outer surface of the operation unit 7, even if the operation unit 7 is gripped strongly, the operation unit 7 is not crushed and has a strong force. The fuel filler cap 2 can be securely attached to the fuel filler 1a.

  In addition, by securing the strength of the cylindrical operation unit 7 with the partition piece 7a, the operation unit 7 can be configured with a thin plate thickness, so that the outer diameter of the operation unit 7 does not become too large and is easy to grip. The operation unit 7 can be configured.

  Further, the fuel that has flowed into the space 8 adheres to the surface of the partition piece 7a, the inner peripheral surface of the operation portion 7, and the outer surface of the fuel filler lid 2, and the attached fuel becomes stuck to the surface 8 due to surface tension. Since the fuel that has flowed into the space 8 does not easily flow out, the fuel in the space 8 does not flow out and drop or adhere to the hand when the fuel filler cap 2 is attached or detached. It became a thing.

  By the way, when there is no fluctuation in the oil level in the oil tank 4, only the tip of the on-off valve 6 of the fuel filler cap 2 is in contact with the oil level. When the fuel flows out from the cartridge tank 1 due to a drop, the oil level near the on-off valve 6 undulates, and in the case of a core up-down type oil combustor, it is submerged in the oil when the core is lowered. The oil level rises by the volume of the lead. It is necessary to reduce the amount of fuel adhering to the fuel filler lid 2 as much as possible and prevent the fuel from adhering to the operation unit 7 against such oil level fluctuations.

  Reference numeral 2b denotes a stepped portion that makes the diameter of the fuel filler lid 2 near the on-off valve 6 smaller than the diameter of the attaching / detaching mechanism 3, and when the filler cap 2 is attached to the filler port 1a, the horizontal portion of the stepped portion 2b is the filler port 1a. The operation portion 7 is arranged so as to surround the outer surface of the detachable mechanism 3 portion between the flange portion 2a and the step portion 2b of the fuel filler lid 2.

  In this configuration, since the tip end portion of the on-off valve 6 that comes into contact with the oil surface when the cartridge tank 1 is mounted in the oil receiver 5 is narrowed by the step portion 2b, the contact area with the oil surface of the fuel filler cap 2 is small. The amount of fuel that decreases and adheres to the fuel filler cap 2 can be reduced. When the fuel filler cap 2 is turned upward to supply the cartridge tank 1, the fuel adhering to the vicinity of the on-off valve 6 diffuses while traveling along the outer surface of the small diameter portion at the tip and the step portion 2b. The amount of fuel that reaches the outer surface of the large-diameter portion provided with the attaching / detaching mechanism 3 is also reduced.

  On the other hand, since the operation unit 7 can be provided at a position away from the oil level in the oil tank 4, even if there is a change in the oil level in the oil tank 4, the operation unit 7 does not touch the oil level. It is possible to prevent the fuel from adhering to the operation unit 7. Moreover, since the operation part 7 can ensure the same height dimension as the attachment / detachment mechanism 3 part of the fuel filler cap 2, the operation part 7 can be easily gripped and reliably operated.

  By the way, plastic tanks for refueling are often stored at the entrance of the house or outdoors, but the temperature at the entrance and the outside is lower than that of the room where the oil combustor is used, and the fuel is also low. Therefore, when the cartridge tank 1 replenished with fuel is brought into a room having a high temperature, the inside of the cartridge tank 1 is warmed to expand the fuel, and the internal pressure of the cartridge tank 1 is increased. When the cartridge tank 1 is attached to the oil receiver 5 in this state, the fuel in the cartridge tank 1 is ejected vigorously when the on-off valve 6 is pushed open by the protrusion 5 a of the oil receiver 5, and the fuel is scattered in the oil receiver 5. If the operation unit 7 is located in the oil receiver 5, there is a concern that fuel may adhere to the operation unit 7, so that when the fuel scatters in the oil receiver 5, Measures to prevent the adhesion of fuel are necessary.

As a countermeasure, 5b is a step portion that makes the diameter of the bottom surface side of the oil receiver 5 smaller than the diameter of the upper opening portion, and the inner diameter dimension of the bottom portion narrowed by the step portion 5b is attached to the oil filler cap 2. It is set so as to be thinner than the inner diameter of the operation portion 7, and the operation portion 7 is positioned above the step portion 5 b of the oil receiver 5 when the cartridge tank 1 is attached to the oil receiver 5.
In the embodiment shown in FIG. 1, a step 2 b is provided on the fuel filler lid 2. In this embodiment, the step 2 b of the fuel filler lid 2 and the operation portion 7 are located above the step 5 b of the oil receiver 5. Only the tip end portion of the oil filler lid 2 that is narrowed by the step portion 2 b is positioned below the step portion 5 b of the oil receiver 5.

In this configuration, when the fuel in the cartridge tank 1 is ejected vigorously, most of the fuel scattered in the oil receiver 5 is weakened against the step 2b of the fuel filler cap 2 and the inner wall of the oil receiver 5, and the fuel filler cap 2 Part of the fuel that hits the stepped portion 2b goes upward through the gap between the fuel filler lid 2 and the oil receiver 5, but the fuel that has passed through the gap goes into the space 8 between the fuel filler lid 2 and the operating portion 7. Thus, it was possible to prevent the operation unit 7 from reaching the outer peripheral surface.
For this reason, even when the fuel splatters in the oil receiver 5, the fuel only adheres to the surface of the fuel filler cap 2, and even if the operation part 7 is located in the oil receiver 5, the fuel is supplied to the operation part 7. Adhesion can be reliably prevented.

  Further, as described above, when the fuel is ejected vigorously from the cartridge tank 1 and a large amount of fuel adheres to the surface of the filler cap 2 or the space 8, the fuel adhering to the filler cap 2 or the space 8 falls and the oil receiver 5. If the fuel remains on the step portion 5 b of the oil receiver 5, the fuel may adhere to the end portion of the operation portion 7.

As a countermeasure, 5c is a plurality of fuel discharge holes provided in the step portion 5b of the oil receiver 5, and the oil receiver 5 and the oil tank 4 are communicated with each other through the fuel discharge holes 5c. For this reason, the fuel that has fallen onto the step 5b of the oil receiver 5 from the outer surface of the fuel filler cap 2 or the space 8 can be discharged to the oil tank 4 from the fuel discharge hole 5c. It is possible to prevent the fuel from accumulating on the top, and there is no risk of fuel adhering to the operation unit 7.
The fuel that has fallen on the step 5b of the oil receiver 5 is likely to collect at the corner between the step 5b and the inner wall on the upper side, so that the fuel discharge hole 5c is arranged near the corner as in the embodiment. Then, it can discharge efficiently.

  In addition, since the present invention only slightly increases the outer diameter of the oil filler lid 2 by the operation portion 7, it can be dealt with only by changing the shape of the oil filler lid 2 for attaching the operation portion 7 and the oil receiver 5, and the cartridge tank It is not necessary to change the shape of the fuel tank 1 or the oil filler port 1a, the existing cartridge tank 1 can be used, and can be realized without making a significant design change.

It is principal part sectional drawing which shows the use condition of the cartridge tank which shows the Example of this invention. It is a top view of the fuel filler cap which shows the Example of this invention. It is a partially cutaway sectional view of a fuel filler cap showing an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cartridge tank 1a Oil supply port 2 Oil supply port lid 2a Eave part 2b Step part 3 Attachment / detachment mechanism 4 Oil tank 5 Oil receiver 5a Protrusion 5b Step part 5c Fuel discharge hole 6 On-off valve 6a Valve seat 7 Operation part 7a Partition piece 8 Space

Claims (3)

A fuel filler cap (2) is detachably attached to a fuel filler port (1a) of a cartridge tank (1) for storing fuel by a detachable mechanism (3),
The cartridge tank (1) is overturned so that the oil filler cap (2) is attached to the oil receiver (5) of the oil tank (4), and the protrusion (5a) of the oil receiver (5) is mounted on the oil filler cap (2). In the cartridge tank, which opens the valve (6) and supplies the fuel from the cartridge tank (1) to the oil tank (4),
The oil filler lid (2) forms a flange (2a) that widens the outer diameter at the end of the cartridge tank (1) on the oil filler (1a) side, and is attached to the outer peripheral edge of the flange (2a). A cylindrical operation part (7) arranged so as to surround the outer peripheral surface of the oil filler lid (2) between the tip of the oil filler lid (2),
A large number of partition pieces (7a) are formed from the inner peripheral surface of the operation portion (7) toward the center, and the partition pieces (7a) are in contact with the outer peripheral surface of the fuel filler cap (2) to contact the operation portion (7). 7) forming a large number of spaces (8) in the gap between the fuel filler cap (2) and the operation part (7) while functioning as a reinforcing member of 7)
And the said operation part (7) sets the height dimension lower than the height dimension of the said fuel filler cap (2),
At a position higher than the oil surface of the oil receiver (5) and lower than the end of the operation portion (7), a step portion that makes the inner diameter dimension on the bottom side smaller than the inner diameter dimension of the operation section (7). Forming (5b),
When the oil filler cap (2) is mounted in the oil receiver (5), the end of the operation part (7) is above the step (5b) of the oil receiver (5) , and the oil receiver (5 ) Is located outside the inner wall on the bottom side ,
The fuel tank adhering to the vicinity of the valve seat (6a) of the on-off valve (6) of the fuel filler cap (2) is directed into the space (8) and does not adhere to the operation portion (7). . The fuel filler cap (2) is provided with a step portion (2b) that makes the diameter in the vicinity of the valve seat (6a) of the on-off valve (6) thinner than the diameter of the attaching / detaching mechanism (3) portion,
The said operation part (7) has been arrange | positioned so that the outer surface of the fueling lid (2) between the collar part (2a) and step part (2b) of a fueling lid (2) may be enclosed. Cartridge tank.   3. A plurality of fuel discharge holes (5c) are provided in a step (5b) of an oil receiver (5) located below a space (8) of the fuel filler cap (2). The cartridge tank as described in.

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