JP2000337629A - Cartridge tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the tilted tightening of a filler cap and make it possible to confirm securely the tightening state of the filler cap. SOLUTION: A cartridge tank is provided with a fill opening arranged at a position of a tank main body, a screw part formed on the outer circumference of the fill opening, a filler cap 14 sealing the fill opening by screwing on the screw part, a first gear coupling 17 arranged covering the filler cap 14, a second gear coupling 18 which engages with the first gear coupling 17 by a predetermined spring force, a spring 19, and a filler cap rotating means 20 which holds an end of the spring 19 and rotates the filler cap 14. The mouth part of the inner surface of the filler cap 14 is formed with a tapered part and therefore, the screw part of the filler cap 14 cannot be screwed on the screw part of the fill opening when the filler cap 14 is tilted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge tank in which a cap having a valve on a tank body is detachable.

[0002]

2. Description of the Related Art Conventional cartridge tanks of this kind are:
As shown in FIGS. 9, 10, 11, and 12, a fuel supply port 2 for supplying fuel is provided at an appropriate position in the tank body 1, and a cap 4 having a valve mechanism 3 is attached to the fuel supply port 2. The end face 2a is sealed with a seal face 3c provided on the cap 4 so that the oil supply port 2 is kept open and closed via the valve mechanism 3. When the device 5 is set in the tank storage space 6, the oil supply port 2 is placed on the oil receiving tray 7 with the oil supply port 2 facing downward, and the valve body 3 b is set by the valve push-up pin 8 provided in the oil receiving tray 7.
Is pushed up, the valve mechanism 3 is forcibly opened, the fuel in the tank body 1 is supplied to the oil receiving tray 7, and when the oil level in the oil receiving tray 7 reaches the discharge port 9 of the valve mechanism 3, the fuel is discharged from the tank body 1. Supply of fuel stops. Then, when the fuel in the oil receiving tray 7 is consumed and the oil level decreases, the supply of the fuel from the tank body 1 is started again. By this repetition, the supply of fuel from the tank body 1 to the oil receiving tray 7 is performed.

Next, when the fuel in the tank body 1 is consumed and needs to be replenished, the tank body 1 is taken out of the equipment 5 so that the valve push-up pin 8 is separated from the valve mechanism 3 and the valve mechanism 3 is built in. The valve body 3b is brought into close contact with the discharge port 9 by the spring 3a to close the valve body 3b, thereby preventing the fuel from flowing out of the tank body 1. In this state, the tank body 1 is turned over, the cap 4 is turned upward, the cap 4 is loosened, and the cap 4 is removed from the fuel filler port 2. After the fuel is supplied from the filler port 2, the cap 4 is attached to the filler port 2, and the cap 5 is again mounted on the device 5 in reverse, so that the supply to the oil receiving tray 7 is started.

[0004]

However, in the conventional configuration, the fuel filler cap 4 and the fuel filler opening 2 are made of thin sheet metal, and the screw portion is formed of a round screw. Since the winding end is gradually narrowed down from the cylindrical shape, as shown in FIG. 12, the tip portion has a low screw thread, and the screw pitch is shifted by one pitch between the low screw portion and the next screw thread, so that it is easy to tighten diagonally. Further, it is possible to diagonally tighten the portion where the thread is low, the next thread and the next screw pitch by several pitches.

[0005] When the oil filler cap 4 is inclined and forcibly tightened at the oil filler opening 2, the oil supply cap 4 is incompletely tightened, which may cause the oil filler cap to come off or leak oil. If the oil supply cap 4 is not properly tightened, the oil supply cap 4 may come off when the tank body 1 is reversed and the oil supply cap 4 is turned downward, or the end surface 2a of the oil supply port 2 and the seal surface 3c of the oil supply cap 4 may be removed. And the fuel in the tank body 1 flows out at once due to the imperfect seal, and the fuel overflows from the oil pan 7 on the equipment 5 side. For example, oil stoves and the like are burned in a state where they are opened indoors. Therefore, if the above-mentioned phenomenon occurs, an extremely unsafe condition may occur. There is.

In order to prevent an unsafe state due to kerosene spill in a petroleum stove such as a petroleum stove that burns indoors, a method of automatically extinguishing the petroleum combustor when the cartridge tank is removed is described. Is generally adopted. However, the oil combustor immediately after the fire was extinguished is in an extremely hot state, and if kerosene is applied to the oil combustor after the fire is extinguished due to the problem of the oil filler cap being removed, it may reignite and start burning, The method of extinguishing the fire at the time of refueling was not a complete measure.

[0007] Furthermore, due to individual differences in the tightening state, there is a problem in attaching and removing the cap. In other words, if a strong person tightens strongly and then a weak person performs replenishment work, on the other hand, it will be difficult to remove the cap, which is extremely difficult to use. There were also problems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and prevents inclined tightening of a cap to a fuel filler so that the cap can be normally tightened even when replenishment is performed. It is an object of the present invention to minimize the adhesion of oil to the cap, to facilitate the attachment and detachment of the cap, and to make the tightening strength constant.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a tank body, an oil supply port provided at an appropriate position in the tank body, a screw portion formed on the outer periphery of the oil supply port, and a screw to this screw portion. A refueling cap that closes the refueling port by combination,
A first gear coupling provided to cover the oil supply cap,
A second gear joint provided to mesh with the first gear joint with a predetermined spring pressure, a spring pressing the second gear joint against the first gear joint, and a lubrication cap for holding one of the springs A refueling cap rotating means for rotating the refueling cap, and when the refueling cap is inclined and attached to the refilling port screw portion, the refueling cap screw portion of the refueling cap is screwed so as not to be screwed. The inner surface entrance has a tapered portion having a length substantially equal to or longer than the screw pitch and gently expanding substantially from the root diameter of the screw.

[0010] According to the above invention, the oiling cap is attached and detached via the ratchet mechanism composed of the first gear coupling, the second gear coupling, and the spring. When the predetermined tightening strength is applied, the first gear joint and the second gear joint idle and regulate the tightening of the oil supply cap, thereby maintaining the predetermined tightening strength. On the other hand, when loosening, the ratchet mechanism applies a force higher than the tightening strength, so that it is instantly loosened and easy to remove.

[0011] Further, since the tapered portion on the inner surface of the screw portion of the oil filler cap has a taper portion having a length substantially equal to or longer than the screw pitch and gently expanding from the root diameter of the screw, the screw portion of the oil filler port is formed. Even if you try to tighten the oil filler cap diagonally by one pitch, the tapered part at the inlet of the screw part inner surface of the oil filler cap will come into contact with the next thread, so that the tapered part slips and cannot be tightened diagonally. Further, even if the screw pitch is shifted by several pitches, the taper portion similarly slips and cannot be tightened diagonally.

Further, the tapered portion that gradually expands at the inner surface of the screw portion of the oil filler cap serves as a guide when the oil filler cap is fastened to the screw portion of the oil filler port.
It is easy to insert the oil filler cap straight into the screw part of the oil filler, it is easier to tighten, and it is possible to avoid the situation where the oil filler cap is obliquely attached to the oil filler, and ensure that the oil filler cap is tightened more than the closed position It can be secured and solves the problem of insufficient tightening of the refueling cap, prevents liquid leakage due to detachment of the refueling cap and incomplete sealing, causing troubles such as liquid flowing out of the tank body at one time and overflow on the oil pan side Trouble can be eliminated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cartridge tank according to a first aspect of the present invention has a tank body, an oil supply port provided at an appropriate position of the tank body, a screw portion formed on the outer periphery of the oil supply port, and a screw engagement with the screw portion. A refueling cap for closing the refueling port by
A first gear coupling provided to cover the oil supply cap,
A second gear joint provided to mesh with the first gear joint with a predetermined spring pressure, a spring pressing the second gear joint against the first gear joint, and a lubrication cap for holding one of the springs A refueling cap rotating means for rotating the refueling cap, and when the refueling cap is inclined and attached to the refilling port screw portion, the refueling cap screw portion of the refueling cap is screwed so as not to be screwed. The inner surface entrance has a tapered portion having a length substantially equal to or longer than the screw pitch and gently expanding substantially from the root diameter of the screw.

Since the oiling cap is attached and detached via a ratchet mechanism composed of the first gear coupling, the second gear coupling and the spring, at the time of tightening, a predetermined or more tightening is performed according to the set pressure of the spring. When the strength is increased, the first gear joint and the second gear joint idle and regulate the tightening of the oil supply cap, and maintain a predetermined tightening strength. On the other hand, when loosening, the ratchet mechanism applies a force higher than the tightening strength, so that it is instantly loosened and easy to remove.

[0015] Further, since the tapered portion on the inner surface of the screw portion of the oil filler cap has a taper portion having a length substantially equal to or longer than the screw pitch and gently expanding from the root diameter of the screw, the screw portion of the oil filler hole is formed. Even if you try to tighten the oil filler cap diagonally by one pitch, the tapered part at the inlet of the screw part inner surface of the oil filler cap will come into contact with the next thread, so that the tapered part slips and cannot be tightened diagonally. Further, even if the screw pitch is shifted by several pitches, the taper portion similarly slips and cannot be tightened diagonally.

Further, the tapered portion that gradually expands at the inlet of the screw portion inside surface of the oil filler cap serves as a guide when the oil filler cap is fastened to the screw portion of the oil filler port.
It is easy to insert the oil filler cap straight into the screw part of the oil filler, it is easier to tighten, and it is possible to avoid the situation where the oil filler cap is obliquely attached to the oil filler, and ensure that the oil filler cap is tightened more than the closed position It can be secured and solves the problem of insufficient tightening of the refueling cap, prevents liquid leakage due to detachment of the refueling cap and incomplete sealing, causing troubles such as liquid flowing out of the tank body at one time and overflow on the oil pan side Trouble can be eliminated.

Further, the cartridge tank according to claim 2 is
When the oil filler cap is attached to the screw part of the oil filler port with the oil filler cap inclined, the screw cap of the oil filler hole is located at the tip of the screw part of the oil filler hole so that the screw part of the oil filler port cannot be screwed. It is configured to have a straight portion having a diameter substantially equal to or longer than the screw pitch.

The same effect as the first aspect is obtained,
Since the straight portion at the tip of the screw portion of the filler port is provided, the straight portion serves as a guide, so that the filler cap is obliquely inclined to the screw portion of the filler port by one pitch and cannot be tightened. In addition, the straight portion at the tip of the screw portion of the filler hole serves as a guide when tightening the filler cap on the screw portion of the filler hole, and the filler cap is inserted straight into the screw portion of the filler hole as in claim 1. Easier,
It becomes easy to tighten, and it is possible to avoid the situation where the oil filler cap is forcibly attached diagonally to the oil filler port,
The oiled cap can be securely tightened beyond the closed position, preventing the oiling cap from being detached or leaking due to incomplete oiling cap tightening. The trouble of overflow on the side can be eliminated.

The cartridge tank according to claim 3 is
A space is provided between the refueling cap and the refueling cap rotating means, and the fuel that drops from the refueling cap when the refueling cap is raised is cut off.

Since a space is provided between the refueling cap and the refueling cap rotating means, the surface of the refueling cap close to the oil level of the fuel gets wet for some reason, and this is the cause of the refueling at the time of refueling. When the user removes or attaches the refueling cap with the cap up, the user tries to lean from the refueling cap and attach to the user's hand, but the refueling cap rotating means is cut off and Since it is held and turned, the portion of the hand touched by the user's hand also has a very small amount of oil attached thereto, and the state in which the hand slips due to oil when turning can be reduced, and workability is greatly improved.

Further, the cartridge tank according to claim 4 is
A space is provided between the refueling cap and the refueling cap rotating means, and a bypass passage is provided in a lower portion of the space, so that the fuel that is dripped from the refueling cap when the refueling cap is turned up can be used to rotate the refueling cap and the fueling cap. It is configured to pass between the moving means.

Further, in addition to the effect of the third aspect, even in a case where a large amount of fuel flows from the fueling cap and overflows from the space between the fueling cap and the fueling cap rotating means, the bypass passage provided at the lower portion of the space is provided. This is more effective because the fuel escapes through the tank, and even if the cartridge tank is stored with the filler port up, even if some dirt or liquid accumulates, the bypass provided in the lower part of the space It came out through the passage,
It will not accumulate much.

Further, the cartridge tank according to claim 5 is
The oil supply cap turning means has an outer diameter such that the oil supply cap turning means comes into contact with the tank body surface when the oil supply cap is attached in an inclined state.

Since the outer diameter of the refueling cap rotating means is large, the lower surface of the refueling cap rotating means comes into contact with the tank body when the refueling cap is attached to the fuel supply port at an angle. And the filler screw cannot be screwed together, and improper mounting can be more reliably prevented.

Further, the cartridge tank of claim 6 is
3. The cartridge tank according to claim 1, wherein the oil supply cap rotating unit has a convex portion on an outer periphery on a side facing the tank body surface. 4.

Further, since a convex portion is provided on the lower surface of the refueling cap rotating means, when the refueling cap is attached to the refueling port at an angle, the refueling cap and the refueling port screw portion come into contact with the lower surface convex portion. Can not be screwed, and improper mounting can be prevented.

[0027]

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a structural view of a cartridge tank according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a main part of an oil supply cap, FIG. FIG. 4 is a cross-sectional view of a main part showing a tightened state of an oil supply cap.

Numeral 11 denotes a tank body for storing fuel, 12
Is an oil meter for checking the amount of fuel in the tank body 1;
3 is a fuel supply port for supplying and discharging fuel to the tank body 1, 1
Reference numeral 3a denotes a screw portion formed on the outer peripheral portion of the filler port 13, 14
Is a refueling cap removably provided on the refueling port 13. A screw portion 14 a provided on the inner surface of the refueling cap 14 and a refueling port 13 are provided.
And a threaded portion 13a of the refueling cap 14 is provided with a tapered portion 14b at the entrance of the inner surface of the threaded portion 14a, which has a length approximately equal to or longer than the pitch of the screw and gradually spreads from the root diameter of the screw. Have.

Reference numeral 15 denotes a valve cylinder integrally provided in the oil supply cap 14 and having a plurality of through holes 15a, and a valve mechanism 16 is provided therein. 17 is a first gear joint provided integrally with the oil supply cap 14 by insert molding or the like so as to cover the oil supply cap 14, 18 is a second gear joint provided so as to mesh with the first gear joint 17 with a predetermined spring pressure, 19 is the second
A spring 20 for pressing and holding the gear joint 18 against the first gear joint 17, a lubrication cap rotating means 20 for holding one of the springs 19 and for revolving the lubrication cap 14 in a detachable manner. The two-gear joint 18, the spring 19, and the oil supply cap turning means 20 form oil supply cap turning means.

The first gear joint 17 and the second gear joint 18 have a ratchet mechanism that engages in a saw-tooth gear shape, and the first gear joint 17 and the second gear joint 18 are connected to a predetermined spring. By locking with the pressure spring 19, the friction mechanism is provided only in one direction of the tightening direction. In other words, when rotating in the tightening direction, if a turning force greater than the sliding resistance determined by the spring pressure is applied,
The first gear joint 17 and the second gear joint 18 rotate while the meshing state changes. The first gear coupling 17 and the second
The gear joint 18 and the spring 19 form an informing means for informing the tightening state of the oil supply cap 14.

Further, between the outside of the first gear joint 17 provided integrally with the oil supply cap 14 and the inside of the oil supply cap rotation means 20 of the oil supply cap rotation means, the oil supply cap 1 is provided.
There is provided a space 21 for cutting off fuel dripping from the refueling cap 14 when the upper side 4 is up.

The valve mechanism 16 housed in the fuel cap 14
Is composed of a valve body 22, a valve seat 23, and a spring 24, and opens and closes a discharge port 25 of the refueling cap 14. Reference numeral 26 denotes an oil pan for temporarily storing fuel to be supplied to the burner of the oil combustor, and 27 denotes a socket attached to an upper opening of the oil pan 26.
8 are protruded.

In the above configuration, the operation will be described. First, when the tank body 11 is mounted on the receiving port 27 of the oil receiving tray 26 with the oil supply cap 14 facing downward, the valve push-up pin 28 pushes the valve body 22 against the spring 24. Push up,
The closed state of the discharge port 25 of the refueling cap 14 by the valve seat 23 is released. As a result, the fuel in the tank body 11 is supplied into the oil receiving tray 26 via the receiving port 27, and is stored up to the oil level of the discharge port 25 of the refueling cap 14. When the oil is consumed by the burner and the oil level in the oil receiving tray 26 decreases, air enters the tank body 11 from the discharge port 25,
The fuel in the tank body 11 is supplied into the oil receiving tray 26 by the air replacement action. By repeating this, the oil pan 26
The oil level inside maintains a constant oil level. And the tank body 1
When the fuel inside 1 decreases to the end of the discharge port 22, the supply of the fuel is continued from the plurality of through holes 15a provided on the outer peripheral portion of the valve cylinder 15, and the fuel in the tank body 11 is almost used up. Will be.

Next, when the fuel in the tank body 11 becomes empty, the tank body 11 is removed from the receiving port 27. At this time, since the operation of pushing up the valve body 22 by the valve push-up pin 28 is released, the valve body 22 is
To return to the original state, and keeps the discharge port 25 closed via the valve seat 23. Then, the tank body 11 is carried to a refueling place, the refueling cap 14 is removed, and refueling is performed by a siphon pump or the like. However, since the tip of the refueling cap 14 is always located in the oil, the refueling cap
The hands are dirty when attaching and detaching, and are very disliked. For this reason, in the present invention, the oil supply cap turning means 20 which is an oil supply cap turning means for removal is provided, and this oil supply cap turning means 20 is formed far apart from the valve mechanism 17 of the oil supply cap 14 so that the oil can be removed. Even if the surface of the refueling cap 14 is diffused, it does not reach the refueling cap rotating means 20 to prevent the hands from being stained. Further, since the refueling cap rotating means 20 is connected to the refueling cap 14 via a ratchet mechanism composed of the first gear coupling 17 and the second gear coupling 18 integrated with the refueling cap 14, the refueling cap turning means 20 can be removed in the removing direction. Is the oil supply cap rotating means 2
The oil supply cap 14 is rotated in synchronization with the oil supply cap 14, and the oil supply cap 14 can be removed by turning the oil supply cap rotation means 20.

Next, when refueling of the tank body 11 is completed, a work of attaching a refueling cap 14 to the refueling port 13 is performed. Generally, a fuel storage place is often dark and cold, such as outdoors or on a veranda. There is a psychological effect that the refueling operation is completed in a short time as much as possible, so that the mounting operation of the refueling cap 14 is neglected, and a case where the tightening is incompletely completed may occur. There is a case in which the device is inclined and attached to the fuel supply port 13, and then is forcibly tightened and attached in an incompletely closed state. In addition, since a certain amount of force is required for the tightening operation, individual differences in tightening strength appear remarkably. That is, since a strong person such as an adult male tends to tighten relatively strongly, oil leakage due to insufficient tightening is unlikely to occur.
Also, when a relatively weak person, such as an elderly person or a woman, performs a tightening operation, it is difficult to grasp the sense of how far to tighten, and the tightening tends to be insufficient, leading to oil leakage. .

Therefore, in the present invention, a tapered portion 14b having a length substantially equal to or longer than the screw pitch and gently expanding from the substantially root diameter of the screw is provided at the inner surface entrance of the screw portion 14a of the oil supply cap 14. Therefore, even if the screw portion 14a of the oil supply cap 14 is shifted by one pitch to the screw portion 13a of the oil supply port 13 and is obliquely tightened, as shown in FIG.
As shown in (b) and (c), the tapered portion 14b on the inner surface entrance of the screw portion 14a of the oil supply cap 14 comes into contact with the next thread, so that the tapered portion 14b slips and cannot be tightened diagonally. Furthermore, even if the screw pitch is shifted by several pitches, the taper portion 14b slips and cannot be tightened diagonally.

The gently expanding tapered portion 14b at the inlet of the screw portion 14a of the oil filler cap 14
3 serves as a guide when tightening the screw portion 14a of the oil supply cap 14 to the screw portion 13a of the third oil supply port 13. It becomes easy to insert the oil supply cap 14 straight into the screw portion 13a of the oil supply port 13, and it becomes easy to tighten the oil supply cap 14. It is possible to avoid a situation in which the fuel supply port 13 is attached diagonally.

Further, the tightening state is notified by the notifying means, and when a predetermined tightening state is reached, the tightening of the refueling cap 14 is regulated, and only the refueling cap turning means 20 as the refueling cap turning means rotates. And

Thus, the refueling cap 14 can be attached to the refueling port 13 in an appropriate state and tightened until the notification operation is started, so that the closed state of the refueling cap 14 can be reliably ensured. Also, it is possible to reliably secure the tightening state of the oil supply cap 14 above the closed position, eliminate insufficient tightening of the oil supply cap 14, prevent oil leakage due to detachment of the oil supply cap 14 and incomplete sealing, and It is possible to eliminate a problem that fuel flows out of the main body 11 and a problem that overflow occurs on the oil receiving tray 26 side.

Further, since the space 21 is provided between the refueling cap 14 and the refueling cap rotating means, the surface of the refueling cap 14 located at a position close to the oil level of the fuel gets wet for some reason, and this is When the user removes or attaches the refueling cap 14 with the refueling port 13 facing upward, the user tries to lean from the refueling cap 14 and adhere to the user's hand, but the refueling cap rotating means is cut off. Since the user turns it while holding it, the part of the user's hand that touches the hand also has very little oil adhesion, and the hand slips due to the oil when turning it can be reduced, making workability extremely low. It will improve.

That is, after the refueling operation, when the refueling cap 14 is mounted on the refueling port 13, first, the tapered portion 14 b of the refueling cap 14 is inserted into the opening of the refueling port 13. The tapered portion 14 b guides the fuel filler cap 14 to the screw portion 13 a of the fuel filler 13 while being restricted by the opening of the fuel filler 13. As a result, the refueling cap 14 is attached to the refueling port 13 in an appropriate state without being inclined.

Next, the oil supply cap turning means 20 is turned in the tightening direction. At this time, the oil supply cap turning means 20 is cut off from the oil supply cap 14, and the user turns the oil supply cap by turning it. Therefore, the area where the user's hand touches is also very little oily,
The state in which the hand slips due to oil when turning can also be reduced. Also, when the oil supply cap rotating means 20 is rotated in the tightening direction, the tightening load is initially small,
Since the notifying means having a friction mechanism formed by the first gear joint 17, the second gear joint 18, and the spring 19 has a larger friction torque, the meshing of the gears does not change. The cap 14 rotates together.

When the rotation of the refueling cap 14 advances to the tightened closed state, the rotation of the refueling cap 14 is restricted. If the oil supply cap turning means 20 is further turned from this position in the tightening direction, the second gear joint 18 will obtain a turning torque greater than the friction torque,
The second gear joint 18 goes over the meshing with the first gear joint 17 and changes to meshing with the next gear. Since the first gear joint 17 and the second gear joint 18 have a saw-tooth gear shape, when the meshing changes, the second gear joint 18 gets over the gear so as to collide with the first gear joint 17. . The tightening and closing state of the oil supply cap 14 is confirmed by a sound or impact generated by a collision when the vehicle gets over the gear or a torque change generated in a process of getting over the sawtooth gear.

Since the above state is continued while the oil supply cap turning means 20 is turned in the tightening direction, the tightening state is not a vague sense of the conventional degree of tightening but a sound, impact and torque change. The present invention can always be confirmed by a sense of hearing and feel that can be reliably determined, and can fix the tightening torque of the oil supply cap 14, thereby solving the problem of overtightening or insufficient tightening.

(Embodiment 2) FIG. 5 is a cross-sectional view of a main part of a fuel filler according to a second embodiment of the present invention, and FIGS. 6 (a), (b) and (c) show main parts in a state where a fuel cap is tightened. It is sectional drawing. The same parts as those described in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

In FIG. 5, the oil supply port 31 has a screw portion 31 of the oil supply port 31 with the oil supply cap 32 inclined.
a, the screw cap 31 and the screw portion 31a of the oil supply port 31 cannot be screwed together, and the tip of the screw portion 31a of the oil supply port 31 has a substantially root diameter of the screw and a length substantially equal to or longer than the screw pitch. And a space 21 is provided between the refueling cap 32 and the refueling cap rotating means 20, and a bypass passage 33 is provided in a lower portion of the space to refuel when the refueling cap 32 is raised. The fuel flowing from the cap 32 is passed between the refueling cap 32 and the refueling cap rotating means 20.

Then, the same effect as in the first embodiment is obtained.
Straight portion 31 at the tip of screw portion 31a of refueling port 31
b, the straight portion 31b serves as a guide, and the screw cap 31
The screw portion 32a is inclined by one pitch while being shifted obliquely, and cannot be tightened. The straight portion 31b at the tip of the screw portion 31a of the filler port 31 is connected to the screw portion 31 of the filler port 31.
a serves as a guide when the screw portion 32a of the fuel supply cap 32 is tightened to the oil supply port 3a as in the first embodiment.
The lubrication cap 32 can be easily inserted straight into the first screw portion 31a, and can be easily tightened. This prevents the lubrication cap 32 from being obliquely attached to the lubrication port 31. It is possible to prevent the oil from leaking out of the tank body 11 at one time and to prevent the oil from overflowing on the oil receiving tray 22 side by preventing the detachment of the tank 32 and the liquid leakage.

Further, since the fuel that is dripping from the fuel cap 32 is large, the fuel cap 32 and the fuel cap rotating
Even if it overflows from the space 21 between
This is more effective because the fuel escapes through the bypass passage 33 provided in the lower part of the space 21, and even when the tank is stored with the fuel supply port 32 facing upward, some dust or liquid is collected. Even if an attempt is made to escape, it will pass through the bypass passage 33 provided below the space 21 and will not accumulate much.

(Embodiment 3) FIG. 7 is a view showing the construction of a cartridge tank according to Embodiment 3 of the present invention.

In the third embodiment, when the outer diameter of the refueling cap rotating means 20 is increased and the refueling cap 14 is attached to the refueling port 13 at an angle, the lower surface of the refueling cap rotating means 20 is at the A portion and the tank body is 11 and refueling cap 14
And the screw portion 13a of the fuel supply port 13 cannot be screwed together, and an improper refueling cap 14 is prevented from being mounted with an extremely simple configuration.

(Embodiment 4) FIG. 8 is a view showing the configuration of a cartridge tank according to Embodiment 4 of the present invention.

In the fourth embodiment, the convex portion 40 is provided on the outer peripheral portion of the lower surface of the refueling cap rotating means 20, and the refueling cap 14 is provided on the lower surface of the refueling cap rotating means 20 when the refueling cap 14 is attached to the refueling port 13 at an angle. The convex portion 40 contacts the tank body 11 at the portion B, and the refueling cap 14 and the screw portion 13 of the refueling port 13 are formed.
In this case, a is not screwable, and an inappropriate mounting of the refueling cap 14 is prevented with a very simple configuration.

In the above-described embodiment, the structure in which the tapered portion 14b is provided at the inlet of the screw portion 14a of the oil supply cap 14 and the structure in which a space is provided between the outside of the first gear joint and the oil supply cap rotating means are provided. Although described at the same time, this may be individual, and a space is provided between the outside of the first gear joint and the refueling cap rotating means, with a configuration having a straight portion 31b at the tip of the screw portion 31a of the refueling port 31. At the same time, the configuration in which the bypass passage is provided in the lower part of the space has been described.
The configuration in which the tapered portion 14b is provided at the inner surface entrance of the threaded portion 14a and the configuration in which the straight portion 31b is provided at the tip of the threaded portion 31a of the oil filler port 31 are described separately. The present invention is not limited to the configuration of the embodiment but may be any configuration as long as the objects and effects of the invention are achieved.

[0055]

As described above, according to the cartridge tank of the first aspect, since the oiling cap is attached and detached via the ratchet mechanism constituted by the first gear coupling, the second gear coupling and the spring, At the time of tightening, when a predetermined or higher tightening strength is applied according to the set pressure of the spring, the first gear joint and the second gear joint idle and regulate the tightening of the oil supply cap to maintain the predetermined tightening strength. On the other hand, when loosening, the ratchet mechanism applies a force higher than the tightening strength, so that it is instantly loosened and easy to remove.

Further, since the tapered portion on the inner surface of the screw portion of the oil filler cap has a taper portion having a length substantially equal to or longer than the screw pitch and gradually expanding from the root diameter of the screw, the screw portion of the oil filler port is formed. Even if you try to tighten the oil filler cap diagonally by one pitch, the tapered part at the inlet of the screw part inner surface of the oil filler cap will come into contact with the next thread, so that the tapered part slips and cannot be tightened diagonally. In addition, even if the screw pitch is shifted by several pitches, the taper portion similarly slips and cannot be tightened diagonally.

The gently expanding tapered portion on the inner surface of the screw portion of the oil filler cap serves as a guide when the oil filler cap is fastened to the screw portion of the oil filler port.
It is easy to insert the oil filler cap straight into the screw part of the oil filler, it is easier to tighten, and it is possible to avoid the situation where the oil filler cap is obliquely attached to the oil filler, and ensure that the oil filler cap is tightened more than the closed position It can be secured and solves the problem of insufficient tightening of the refueling cap, prevents liquid leakage due to detachment of the refueling cap and incomplete sealing, causing troubles such as liquid flowing out of the tank body at one time and overflow on the oil pan side Trouble can be eliminated.

According to the cartridge tank of the second aspect, since the straight portion at the tip of the screw portion of the fuel filler is provided, the straight portion serves as a guide, and the fuel filler cap is shifted by one pitch to the thread of the fuel filler. It can't be tightened because it's slanted. In addition, the straight portion at the tip of the screw portion of the filler hole serves as a guide when tightening the filler cap on the screw portion of the filler hole, and the filler cap is inserted straight into the screw portion of the filler hole as in claim 1. This makes it easier to tighten the lubrication cap, avoiding the situation where the refueling cap is obliquely attached to the lubrication port, ensuring that the lubrication cap is securely tightened above the closed position and incompletely refueling cap tightening. This prevents the oil supply cap from coming off and the liquid from leaking, thereby preventing the oil from flowing out of the tank body at one time and the oil tank from overflowing.

According to the cartridge tank of the third aspect, since a space is provided between the refueling cap and the refueling cap rotating means, the surface of the refueling cap located close to the fuel level of the fuel may have any problem. When the user removes or attaches the refueling cap with the refueling cap up when refueling, the user is likely to lean off the refueling cap and attach to the user's hand, but the refueling cap rotating means Is cut off and turned by the user, so that the part of the user's hand that touches the hand has very little oil adhesion, and the hand slips due to the oil when turning it. The property is greatly improved.

According to the cartridge tank of the fourth aspect, even in a case where a large amount of fuel drops from the refueling cap and overflows from the space between the refueling cap and the refueling cap rotating means, the bypass provided in the lower space is provided. It is more effective because the fuel escapes through the passage, and it is provided in the lower part of the space, even if the cartridge tank is stored with the filler port up, even if some garbage or liquid tends to accumulate. It comes out through the bypass passage that has been made, so that it does not accumulate much.

According to the cartridge tank of the fifth aspect, since the outer diameter of the oil supply cap rotating means is increased, when the oil supply cap is attached to the oil supply port at an angle,
The lower surface of the refueling cap rotating means contacts the tank body,
The oil filler cap and the oil filler screw cannot be screwed together, and improper mounting can be more reliably prevented.

According to the cartridge tank of the sixth aspect, since the projection is provided on the lower surface of the oil supply cap rotating means, when the oil supply cap is attached to the oil supply port at an angle, the lower surface comes into contact with the projection on the lower surface. As a result, the oil filler cap and the oil filler screw cannot be screwed together, thereby preventing improper mounting.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a cartridge tank according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of an oil supply cap of the cartridge tank.

FIG. 3 is a sectional view of an essential part showing a state where the cartridge tank is installed in a device.

FIG. 4A is a sectional view of a main part showing a tightened state of an oil supply cap of the cartridge tank. FIG. 4B is a sectional view of a main part showing a tightened state of an oil supply cap of the cartridge tank. Sectional view of main part showing tightened state of cap

FIG. 5 is a sectional view of a main part of an oil supply port of a cartridge tank according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a main part showing a tightened state of an oil supply cap of the cartridge tank.

FIG. 7 is a configuration diagram of a cartridge tank according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram of a cartridge tank according to a fourth embodiment of the present invention.

FIG. 9 is a view showing a conventional operation of removing an oil supply cap of a cartridge tank.

FIG. 10 is a view showing an operation of installing the cartridge tank in a device.

FIG. 11 is a sectional view of a main part showing a state where the cartridge tank is installed in a device.

FIG. 12 is a view showing an operation of removing an oiling cap of the cartridge tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Tank main body 13, 31 Refueling port 13a, 31a Refueling port screw part 31b Refueling port straight part 14, 32 Refueling cap 14a, 32a Refueling cap screw part 14b Refueling cap taper part 17 First gear coupling 18 Second gear Joint 19 Spring 20 Oil supply cap rotating means 21 Space 33 Bypass passage 40 Convex part

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takehiko Shigeoka 1006 Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Shigeru Murakami 1006 Kadoma Kadoma Kadoma, Osaka Pref. Terms (reference) 3E082 AA01 BB10 DD01 3K068 AA15 BB01 BB12 BB20 CB03 CB12 CB14 CB18 DA16 EA03 EA06

Claims (6)

[Claims] 1. A tank body, a filler port provided at an appropriate position on the tank body, a screw portion formed on the outer periphery of the filler port, a filler cap for closing the filler port by screwing into the screw part, and a fuel filler. A first gear coupling provided to cover the cap, a second gear coupling provided to mesh with the first gear coupling with a predetermined spring pressure, and the second gear coupling is pressed against and held by the first gear coupling. A spring and a refueling cap rotating means for holding one of the springs and rotating the refueling cap are provided, and when the refueling cap is attached to the screw portion of the refueling port in an inclined state, the refueling cap and the refueling port are provided. A cartridge tongue having a tapered portion at the inner surface entrance of the screw portion of the refueling cap and having a length substantially equal to or longer than the screw pitch and gradually expanding from the root diameter of the screw so that the screw portion cannot be screwed. . 2. An oil filler port is provided at the tip of the oil filler screw part so that when the oil filler cap is inclined and attached to the oil filler screw part, the oil filler cap and the oil filler screw part cannot be screwed together. A straight portion having a substantially root diameter of the screw and a length substantially equal to or longer than the pitch of the screw.
The described cartridge tank. 3. A cartridge according to claim 1, wherein a space is provided between the refueling cap and the refueling cap rotating means so as to cut off fuel dripping from the refueling cap when the refueling cap is raised. tank. 4. A space is provided between the refueling cap and the refueling cap rotating means, a bypass passage is provided at a lower portion of the space, and the fuel dripping from the refueling cap when the refueling cap is raised is connected to the refueling cap. 3. The cartridge tank according to claim 1, wherein the cartridge tank is configured to pass between the oil supply cap rotating means. 5. The oil supply cap rotating means has an outer diameter such that the oil supply cap rotating means contacts the tank body surface when the oil supply cap is mounted in an inclined state.
Or the cartridge tank according to 2. 6. The cartridge tank according to claim 1, wherein the oil supply cap rotating means has a convex portion on an outer periphery on a side facing the tank body surface.