JP2002372232A - Feed oil tank and liquid fuel burning device loading the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feed oil tank provided with an oil feed port closing means being high in safety and a liquid fuel burning device using the tank. SOLUTION: The liquid fuel burning device is provided with a cap member 203 rotatable along a guide member 202 situated at the periphery of the mouthpiece of a feed oil port 44. The cap member 203 consists of a cover base 204 engaged with the guide member 202; and a cap 206 rotatable for opening and closing the feed oil port 44 around the a shaft 205 based on the cap base. On the opposite surfaces of the cap 206 and the mouth piece 201, an engaging protrusion 208c is formed on the cap side, and a notch hole 201d allowing engagement of the engaging protrusion and a guide groove 201e continued thereto are formed on the mouthpiece 201 side. A spring 210 to energize the cap in an opening direction is provided between the cap 206 and the cap base 204. The cap 206 is opened and closed through the two-stage operation of rotation operation around a mouthpiece and opening closing rotation operation around the shaft 205, and the cap 206 is prevented from being opened carelessly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank mounted on a liquid fuel combustion device such as an oil fan heater.

[0002]

2. Description of the Related Art Conventionally, petroleum fan heaters have been widely used in ordinary households as heating equipment in winter. FIG.
Is a schematic partially omitted front sectional view showing an example of a conventional oil fan heater, and FIG. 23 is a side sectional view thereof. FIG.
4 is a cross-sectional view of a fueling cap and a receiving member of the fueling tank.

As shown in FIG. 22, an oil supply tank 202 for injecting and storing a liquid fuel 204 such as kerosene in advance is provided on the inner side of the oil fan heater body 201. A sufficient amount of liquid fuel 204 is supplied to a fuel tank 203 connected below the tank 202.

The liquid fuel 2 stored in the fuel tank 203
04 is guided to a vaporizer 207 via an oil feed pipe 206 by an electromagnetic pump 205 for fuel pressure feeding. Here, by a vaporizer heater (not shown) provided in the vaporizer 207,
The sent liquid fuel 204 is vaporized. A combustion chamber 209 has a burner 208 supported and fixed to the bottom thereof.

[0005] The fuel gas vaporized by the vaporizer 207 is vigorously injected from a nozzle, introduced into a burner 208 together with combustion air, burns at a flame opening 208a, and heats the air in a combustion chamber 209. Then, as indicated by the arrow in FIG. 23, the air in the room sucked in through the filter 212 by the blower fan 211 attached to the fan motor 210 such as a single-phase induction motor provided on the back of the main body 201 is supplied to the combustion chamber 209. The air is blown into the room from the outlet 213 as warm air together with the heated air and the combustion gas therein.

On the other hand, a frame sensor 214 provided slightly above the flame opening 208a detects a flame current due to a combustion flame. When a flame current of a predetermined value or more is detected, the fan motor 210 is energized, and Accompanying fan 211
Rotates, and the air sucked from the room is blown into the room from the outlet 213 as warm air.

At this time, the room temperature is detected by the room temperature thermistor 215, and a control device (not shown) controls the driving of the oil pump 205 for fuel pressure feeding based on the temperature difference between the room temperature and the set temperature. , Liquid fuel 204 vaporizer 20
7 and the heating power of the combustion flame in the burner 208 is adjusted.

For example, if the operation of the oil fan heater is started when the room temperature is low, the liquid fuel 204 to the vaporizer 207
Is increased to increase the room temperature rapidly to the set temperature, and thereafter, the supply amount of the liquid fuel 204 is adjusted to be kept constant near the set temperature.

Also, as shown in FIG.
02, the fuel tank 202 is taken out of the main body 201, the upside down direction is reversed, the fuel cap 216 having the valve portion of the fuel tank 202 is removed, fuel is injected from the base 217, and the fuel is supplied to the fuel tank 202. After confirming that the oil has been supplied, the lubrication cap 2
Then, the fuel supply cap 216 is turned upside down and inserted into the main body 201. Then, the receiver 2 is attached to the upper surface of the fuel tank 203.
18, the refueling cap part 216 is inserted into the refueling tank 2.
02 is placed on the fuel tank 203.

[0010]

By the way, in the conventional oil fan heater, it is necessary to take out from the main body to refuel the fuel tank and turn the fuel tank upside down so as to turn the fuel cap upward. It is necessary to turn the oil supply tank up and down again to close the oil supply cap and insert it into the main body, which is cumbersome to handle.

Furthermore, the fuel cap is fastened with a base and a screw. If the fuel cap is not sufficiently tightened, the fuel cap may come off when the fuel tank is turned over, or the fuel may flow out. there were. Particularly in an aged society, there has been a demand for an improvement in gripping force due to a decrease in gripping force and a decrease in screw tightening force.

When fuel is supplied to the fuel tank,
The oil level rises to the valve of the refueling locator, and the fuel in the refueling tank is supplied while maintaining the constant oil level by replacing the air.Therefore, the valve of the refueling port cap is always wet with fuel. When removing the refueling cap to refuel the tank, the fuel adheres to the hand and slips when tightening the screw. At the same time, the hand becomes difficult and dirty.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a liquid fuel combustion apparatus which does not turn over when fuel is supplied to a fuel tank and has no fuel attached to hands.

[0014]

In order to achieve the above object, a fuel tank according to the present invention is removably mounted in a main body of a liquid fuel combustion device, and a fuel supply port for supplying fuel is provided above the tank. A refueling port closing means is provided for closing and releasably closing the refueling port. The refueling port closing means is rotatable around a base of the refueling port, and is opened and closed about an axis with respect to the refueling port. A lid is provided so as to be freely opened and closed by a two-stage operation of a rotation operation around the base and an opening and closing rotation operation around an axis.

According to the above configuration, the lid is opened and closed by two operations, namely, a rotation operation around the base and an opening / closing rotation operation around an axis perpendicular to the rotation center axis. Can be prevented.

As a specific mode of the filler opening means, there is provided a lid member rotatable along a guide member provided around the filler base, and the lid member is rotatable around the base. A lid base engaged with the guide member, and a lid that can open and close a refueling opening around an axis perpendicular to a rotation center axis of the lid base, and an opposing surface between the lid and a base. A notch hole formed on one of the lid and the base, and a notch hole formed on the other of the lid and the base to allow the engagement of the engagement protrusion in a closed posture of the lid with respect to the lid base. And a guide groove formed along the direction of rotation around the base following the notch.

According to the above construction, when the lid is opened, the lid member is rotated around the base to move the engagement projection from the end side to the start end side of the guide groove, and the engagement projection and the notch hole between the lid and the base are opened. The lid cannot be opened and rotated around the axis unless it is aligned. In order to close the lid, the lid is closed and rotated to the closed position around the axis, and after the engagement projection and the notch hole of the lid and the base are aligned, the engagement projection is moved from the start end side to the end side of the guide groove. If the lid member is rotated to move, the lid can be switched to the closed position.

In this case, if a spring for urging the lid in the opening direction is provided between the lid and the lid base in order to pivotally open the lid around the axis, the lid is engaged by a rotation operation around the base of the lid. When the projection is located at the cutout position, the lid can be easily opened by the biasing force of the spring.

An arc-shaped guide groove formed on one of the guide member and the lid base, and a guide pin provided on the other so as to engage with the guide groove, the arc length of the guide groove being provided. If the engagement protrusion is set to a length that can be guided from the beginning to the end of the guide groove, the rotation range around the base of the lid is limited, and unnecessary rotation operation can be avoided.

The guide groove has a shape inclined downward from the start end to the end, and a locking portion for locking the engagement projection is provided at the end of the guide groove. If it is set so as to be pressed toward the inside of the tank, the engagement protrusion is locked by the locking portion at the guide groove end position of the protrusion, so that the opening of the lid can be restricted.

At this time, if the lid packing is provided at a position where the lid comes into contact with the upper end of the base, and if the lid packing is set to be elastically contacted with the upper end of the base in a state where the guide groove of the projection is locked, the sealing state of the oil filler port is obtained. Can be secured.

Further, if the materials of both members are selected so that at least the opposing portions of the lid and the base are covered with metal, it is possible to prevent the oil filler opening from being opened by the influence of heat. Furthermore, it is also possible to provide a non-slip means around the lid to easily perform the turning operation of the lid. Further, it is also possible to provide a receiving portion for receiving a filter for removing fuel dust and dust from the base of the fuel filler, and to position the filter.

Further, in a liquid fuel combustion apparatus equipped with a fuel tank having any one of the above-mentioned structures, if a means for restricting opening of a lid member of a tank fuel port is provided in a state where the apparatus body of the fuel tank is housed, Fuel cannot be replenished while attached to the main body, and concerns such as fuel leakage are eliminated.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of Main Body] FIG. 1 is a perspective view of a petroleum heating apparatus according to the present invention as viewed from the front, and FIG. As shown in FIGS. 1 and 2, in an oil heating apparatus, an exterior part of a main body 1 that houses a combustion unit and a fuel tank has a front plate 6 that covers a front surface, and a side back plate 7 that covers a side surface and a back surface.
And an upper plate 8 that covers the upper surface, and is formed in a box shape that is open downward, and the main body 1 is mounted on the mounting table 5.

An outlet 2 for blowing warm air into the room is formed below the front panel 6, and an operation section 3 containing switches for switching the operation state is arranged above the front panel 6. The upper plate 8 is formed with an outlet 4b for a fuel tank, and the outlet 4b is provided with a tank lid 4 which can be opened and closed.

As shown in FIG. 2, a convection fan 9 for sucking indoor air is disposed on the back side of the side back plate 7.
The convection fan 9 is reguarded by a net-like convection guard 10 so that dust can be prevented from being sucked.
A temperature sensor 11 for detecting the indoor temperature is provided on the back side of the side back plate 7.

FIG. 3 is a schematic diagram showing a liquid fuel combustion device and its fuel path in the oil heating apparatus of FIG. The liquid fuel combustion device has a fuel tank 12 which can be removed from the main body.
A first connecting means 13 and a second connecting means 17 for connecting the fuel tank 12 and the carburetor 15 of the combustion section 25 when the fuel tank 12 is mounted on the main body; An electromagnetic pump 14 serving as a pump, and a vaporizer 1 for heating fuel from the electromagnetic pump 14 to produce a vaporized gas
5, a burner 16 that ejects the vaporized gas from the vaporizer 15 from the nozzle and mixes with the combustion air to burn, and a shutoff valve that sends air to the oil supply path and shuts off fuel supply to the electromagnetic pump 14 side. An air valve 18 and an electromagnetic valve 501 as a shutoff valve that is disposed in a detour bypassing the electromagnetic pump 14 and that shuts off fuel passing through the detour are provided.

These members are connected by pipes 21, 22, 23 and 502, 503, and the fuel from the fuel tank 12 is fed from the electromagnetic pump 14 to the carburetor 15 through the first connection means 13. A path B and a return path C for returning the unburned gas from the vaporizer 15 to the oil supply tank 12 bypassing the electromagnetic pump 14 are formed. In the return route C, a mode in which piping is omitted by using a part of the oil feed route B is adopted. That is, a detour including pipes 502 and 503 that detour from the vaporizer 15 to the electromagnetic pump 14 and a branch that branches from the vicinity of the first connection means 13 to the fuel tank are provided. Two connecting means 17 are provided, and the other means uses the piping of the oil supply path B.

FIG. 4 is a partially cutaway view of the front plate side of the main body of FIG. 1, FIG. 5 is a side cross-sectional view of the main body combustion section, and FIG. 6 is a plan view of the fuel tank housing chamber. As shown in FIG.
As viewed from the front, a combustion section 25 is disposed on the left side, and a fuel tank 12 and an electromagnetic pump 14 are disposed on the right side. Body 1
The left side of the figure has a combustion section 25 incorporating the burner 16 and the carburetor 15, a combustion section frame 26 surrounding the combustion section 25, and a combustion section frame front 27 covering an upper front portion of the combustion section frame 26. ing.

The combustion section 25 includes a vaporizer 15 and a burner 16.
And a burner box 28 for storing the burner 16, a burner partition plate 29 for fixing the burner box 28, and a combustion chamber 30 surrounding the flame of the burner 16.

The vaporizer 15 vaporizes the liquid fuel supplied from the electromagnetic pump 14 by the vaporizing element and converts the liquid fuel into the solenoid valve 3.
The vaporized fuel can be spouted toward the burner 16 from the nozzle 31 whose opening and closing are controlled by the nozzle 3. Unburned gas remaining in the vaporizer 15 due to blockage of the nozzle of the vaporizer 15 is returned to the fuel tank 12 through the pipes 502 and 503.

The burner 16 mixes the combustion gas vaporized by the vaporizer 15 with the primary combustion air, and burns the mixed combustion gas at a flame port 16b. The burner box 28 has a box shape that is open at the top and can accommodate the burner 16. The mixing tube of the burner 16 is attached to the bottom surface side, and the ignition heater 35 and the frame sensor 36 are attached to the side surface. Has become. A burner cover 37 is attached to the lower surface of the burner box 28, and the sound absorbing and heat insulating material attached to the inside prevents absorption of combustion noise and a decrease in the temperature of the burner itself.

First connection means 13 and second connection means 17
Has a structure separated into a connection joint portion on the refueling tank side and a connection joint receiving portion on the combustion portion side, respectively.
Both joints 13a, 17a of the first and second connection means 13, 17 are integrated to form a joint 47, and the connection joint of the first and second connection means 13, 17 on the combustion section side. The receivers 13b and 17b are integrated to form the joint receiving portion 100, and have a compact structure. Since the joint portion 47 is a tank mounting member among the connecting means 13 and 17, the details of the connecting means 13 and 17 will be collectively described in the configuration column of the fuel tank.

As shown in FIG. 6, a substantially rectangular tank accommodating chamber 4a surrounded by a tank guide 41 is disposed on the right side of the main body, and a part thereof is cut and raised at the right corner of the tank guide 41 to form a rectangular parallelepiped. The tank guide fixing member 42 is attached, and the electromagnetic pump 14 and the electromagnetic valve 501 are mounted below the fixing member 42.

A water detecting means 68 for detecting water generated in the fuel tank and a fuel amount detecting means 69 for detecting the amount of fuel in the fuel tank 12 are provided on the bottom side of the tank housing chamber. The water detecting means 68 and the fuel amount detecting means 69
Since a part of the configuration is disposed on the bottom surface side of the fuel tank 12, it will be described in detail in the configuration section of the fuel tank.

[Configuration of Refueling Tank] FIG.
FIG. 2 is a perspective view of a rear view 2 of FIG. As shown in the figure, the refueling tank 12 has a substantially flat refueling tank left member 12a.
And a refueling tank right member 12b press-formed into a container shape having a U-shaped cross section and open on the left side, are joined by adrian processing to form a substantially rectangular parallelepiped, and have a substantially rectangular shape when viewed from the top side. The front and rear corners on the right side are rounded.

For this reason, when inserting the refueling tank 12 into the storage section 4a, even if an attempt is made to insert the refueling tank 12 into the tank storage chamber with the left and right turned upside down, R
The front and rear corners of the fuel tank left member 12a hit the shape corners, so that the tank 12 cannot be inserted.

On the side of the refueling tank right member 12b, a handle 43 composed of a metal ring 43b mounted on the upper surface of the tank so as to be rotatable and rotatable, and a resin grip 43a fixed to the center thereof, The fuel supply port 44 formed on the inclined surface 12c formed by connecting the three surfaces is provided, and the closing means 19 for closing the fuel supply port 44 is provided.

In the fuel tank 12, an oil meter for visually checking the fuel level in the oil tank 12 is provided on a side surface near the oil supply port closing means 19, and a side surface near the oil meter, that is, A concave portion 12d is formed in which a right front corner of the tank right member 12b is depressed inward.
A connection joint 47 (see FIGS. 16 to 20) on the fuel tank side is fixed to d. An air hole 51 is formed on the upper surface of the fuel tank 12 so that an air hole 51 is opened or closed depending on whether or not the air tank 51 is attached to the main body of the fuel tank. Means 52 (see FIGS. 14 and 15) are provided. further,
On the bottom side of the tank 12, a part of the structure of the water detecting means 68 and the fuel amount detecting means 69 is provided (see FIG. 21). Hereinafter, each means will be described in order.

FIG. 8 is a side view of the tank filler, FIG. 9 is a sectional view of the same, FIG. 10 is an exploded perspective view of the filler filler, and FIG. 11 is a filler side member. 12 is a plan view showing an overlapping state of the lid member with respect to the fuel filler member, FIG. 13A is a plan view showing an open posture of the lid member, and FIG. 13B is a closed state of the lid member. It is a top view.

As shown in FIGS. 8 to 10, the oil supply tank 12 has an inclined surface 12c having a slope of at least 30 degrees downward from the tank upper surface between the upper surface and two adjacent side surfaces. The oil inlet 44 is provided on the inclined surface 12c.
Is arranged. The refueling port 44 includes a cap base 201 protruding outward from the inclined surface 12 c, and the opening of the cap base 201 is closed by a rotatable lid member 203 so as to be openable and closable.

That is, the refueling port closing means 19 of the refueling port 44 of the refueling tank 12 is provided with a hole which is fitted to the cap cap 201 and the refueling port 44 and is spot-welded to the inclined surface 12c to be integrated with the guide. The vehicle includes a member 202 and a lid member 203 rotatable along a guide member 202 provided around a base of a fuel filler. Then, the lid member 20
Reference numeral 3 denotes a lid base 204 engaged with the guide member 202 so as to be rotatable around the base 201, and an opening / closing rotation of the fuel supply port 44 about an axis 205 orthogonal to a rotation center axis of the lid base 204. And a lid 206 that can be freely adjusted.

The cap base 201 is made of a double cylindrical metal, and has a ring-shaped flat contact with which the upper end of the outer cylinder 201a is folded inward and the lid packing 211 of the lid member 203 contacts. A contact surface 201b is formed, and an inner cylinder 201c continuous with the contact surface 201b extends downward with an interval from the outer cylinder 201a. In a part of the contact surface 201b, two notches 201d, through which an engagement protrusion 208c of the cover fitting 208 described later passes, are formed facing two places.

A guide groove 2 is formed in the inner cylinder 201c so as to be continuous with the notch hole 201d along the rotation direction around the base.
01e is formed. The guide groove 201e is inclined at a downward slope having a certain angle with respect to the notch hole 201d. A locking portion 201f for restricting the rotation of 208c is formed.

In this embodiment, the guide groove 201e is formed in a groove shape in which the lower end of the inner cylinder 201c is notched and the lower end is opened. However, not the lower end edge of the inner cylinder 201c but the middle position is cut out and the upper and lower ends are closed. The groove may be formed in a groove shape.

A receiving portion 20 for receiving a cylindrical filter 212 for removing fuel dust and dust is provided at the lower end of the inner cylinder 201c.
1h is bent inside. Also, the outer cylinder 201a
Flange 201g is bent outward at the lower end of
The flange 201 g is welded to the wall surface of the fuel tank 12 from the inside of the fuel port 44 of the fuel tank 12.

The guide member 202 is a press-formed product of a metal plate material having a length set from below the inclined surface 12 c to near the upper surface of the tank.
a cover base rotation guide portion 202a which is fitted to the outside of the cover base a, and a plate-shaped regulating portion 202b which is disposed on the upper surface side of the tank and regulates the left-right rotation range of the cover base 204.

The rotation guide 202a is provided with the cap base 2
01 of the outer ring 201a of the guide ring 202c
And a cylindrical portion 202d that rises from the inner end thereof and is also externally fitted to the outer cylinder 201a, and a claw 202e that is bent radially outward from four circumferential positions at the upper end of the cylindrical portion 202d.
A leg 202f is bent downward from three places around the guide ring 202c, and the leg 202f is welded to the tank inclined surface 12c.

An arc-shaped guide groove 202g centering on the center of the opening of the base 201 is formed in the regulating portion 202b.
The guide pin 2 of the lid base 204 is inserted into the guide groove 202g.
04c is detachably and slidably engaged. The arc length of the guide groove 202g is set to a length that can guide the engagement protrusion 208c from the start end to the end of the guide groove 201e. The restricting portion 202b is formed with a leg portion 202h bent downward, and the leg portion 202h is attached to the tank inclined surface 12c.
Is welded to.

The lid base 204 has a C-shaped rotating portion 204a which is rotatably guided by the rotating guide portion 202a of the guide member 202, and the bearing portions 20 connected to both ends thereof.
4b, and a stopper portion 204d, which is formed on the tank upper surface side of the bearing portion 204b and has a guide pin 204c protruding and formed below the bearing portion 204b, is integrally formed of a synthetic resin.

The guide member 20 is rotated while the rotating portion 204a is rotating.
In order to prevent slipping out of the second rotation guide portion 202a, four retaining claws 20 are provided on the inner periphery of the rotation portion 204a.
4c is formed. The tip of the retaining claw 204c is formed in an arc shape, and the rotation guide portion 20 is formed by the arc surface.
The cylindrical portion 202a of 2a is slidably guided.

The bearing portion 204b is provided with a C-shaped rotating portion 204.
a formed in a U-shape in a plan view that is continuous with both ends of the a. A bearing hole 204e is formed on both side walls to fit the shaft portion of the lid 206, and the bearing hole 204e is continuously rotated. Insertion groove 2 which is open at the side of the bearing and is narrower than the bearing hole 204e
04 g are formed. A locking pin 204f of a lid urging spring described later is provided on the inner surface of the left and right side walls of the bearing portion 204b.
Are formed to protrude.

The stopper portion 204d is a plate-like member that extends laterally below the central wall of the bearing portion 204b.
A movable piece 204h that is elastically movable in the vertical direction is formed by a notch groove 204g having a U-shape in plan view by the three-directional grooves, and engages with the guide groove 202g of the lid base 204 downward from the tip of the movable piece 204h. A cylindrical guide pin 204c extends.

The lid 206 includes a lid 208, a lid cover 209 for covering the lid, and a lid packing 211. The lid 208 includes a metal main body 208a and a metal plug 208b welded to the center of the lower surface thereof. The cover 208 is a portion facing the base 201 when the cover is closed, and the base 201 and the cover 2
08 are both made of a metal member, so that they are rarely damaged even if they are affected by heat, so that there is no fuel leakage and it is possible to use the fuel cell without worry.

The metal fitting body 208a is a disc-shaped one having an inverted concave shape. A plug metal fitting 208b is fixed by welding at the center thereof, and a lid packing 211 is mounted around the metal fitting. Further, lid covers 209 are attached and fixed to the three flange portions on the outer periphery of the fitting main body 208a by screws.

The stopper 208b is a cylindrical member with a canopy.
01. The stopper 208b has a canopy welded to the fitting body 208a, and a lid packing 211 is mounted on the outer peripheral side.

Then, on the peripheral surface of the stopper 208b,
At a position corresponding to the notch hole 201d of the cap base 201, an engagement protrusion 208c is formed to engage with the notch hole 201d so as to be insertable from above. The engagement protrusion 208c is
The lid 206 is inserted into the notch 201d in the closed position around the axis 205, and slides along the groove wall of the guide groove 201e of the base 201 by the clockwise rotation of the lid 206 when viewed from above, and at the terminal end thereof. Locked by locking portion 201f.

The lid cover 209 is made of a synthetic resin having a central portion protruding upward and having a circular appearance, and a plurality of projections 209 a as anti-slip means formed on an outer peripheral portion. When turning, the hand slips. As shown in FIG. 13B, the protrusion amount of the protrusion 209a is
When the fuel tank 12 is mounted on the main body, the cover member 204
In order to open the cover member 204, the outer end of the projection 209a contacts the tank guide 41 of the tank accommodating chamber so that the cover member 204 cannot be opened even if the cover member 204 is rotated leftward.
That is, a part of the wall surface of the tank guide 41 is positioned inside the rotation locus D of the tip of the projection 209a, and the projection 209a and the tank guide 41 regulate the opening of the lid member 203. Is composed.

The upper surface of the tank of the lid cover 209 is
Base 20 that can be fitted to bearing portion 204b of lid base 204
9b are formed, and lids 20 are provided on both left and right sides of the base 209b.
A shaft 205 for vertically moving the shaft 6 is formed so as to protrude.
05 engages with the bearing hole 204f of the lid base 204. A coil-shaped lid spring 210 is inserted into the shaft 205, one end of which is hooked on the lid cover 209, the other end of which is hooked on the engagement projection 204 f of the lid base 204, and the engagement projection 208 c of the plug 208 is fitted with the engagement projection 208 c. Notch 20 of base 201
When the user releases his / her hand from the lid 206 in the closed position 1d, the lid 206 opens in the opening direction. The inner surface of the lid cover 209 is formed with a recess on the inner side of one step, and the periphery thereof is fixed to the metal fitting body 208a with screws.

The lid packing 211 is elastically brought into contact with the contact surface 201b at the upper end of the opening wall of the base 201 in a state where the engaging projection 208c is locked at the end of the guide groove, and exerts a sealing function.

The procedure for assembling the closing means having the above-mentioned components is as follows.
First, a cap base 201 and a filter receiver are mounted on a fuel supply port 44, and further, a fuel tank 12 in which a guide member 202 is welded.
The claw 202e on the upper surface side of the guide member 202 and the claw 202
e, the claw 204c on the inner side of the lid base 204 is aligned with the claw 204c, and inserted downward from above, and slightly rotated so that the pin 204c of the stopper 204d of the lid base 204 is inserted into the guide groove 202g of the guide member 202. Insert

Further, the lid 20 with the lid packing 211 mounted thereon
6 shaft 205 into the bearing hole 20 of the lid base bearing portion 204b.
4e is inserted and assembled by applying a slight force from the notched insertion groove side. At this time, the bearing hole 2 of the bearing portion 204b
When the shaft 205 is settled in 04e, the state where the insertion groove is expanded returns to the original state, and the shaft 205 does not come off.

Oil filler closing means 19 assembled in this way
In, after fuel is supplied in the open state of the lid 206 of the refueling tank 12, when the lid 206 is pressed to the tank side at the position of the open state of the lid 206, the engaging projection 208c of the stopper 208 associated with the lid 206 causes It is inserted through the notch 201d of the base 201 of the fuel filler 44. FIG. 13A shows the lid closing posture in the open state of the lid 206.

When the cover member 203 is rotated clockwise from the state shown in FIG.
06, the engaging projection 208c of the stopper 208 is connected to the notched hole 201d of the base 201 by the inclined guide groove 201.
At the end point of the guide groove 201e, the engaging projection 208c is lowered and fixed to the locking portion 201f, so that the lid 206 cannot rotate in the opening direction. In this state, the upper end contact portion 201b of the base 201 and the lid packing 211 of the lid 206 are joined to each other to be in a sealed state.

Further, the cover member 20 is moved counterclockwise from the closed position.
3, the position where the guide pin 204c of the lid base 204 is at the leftmost position of the guide groove 202g of the guide member 202 is a position where the lid member 203 does not rotate any further. The projection 208c is located at the position of the notch 201d of the base 201, and the engaging projection 208c can move upward. When the lid member 203 is rotated to this position, the lid member 210 is
03 opens and rotates about the axis 205 in the opening direction, and the oil supply port 44 of the oil supply tank 12 is opened.

However, when the fuel tank 12 is mounted on the main body, the wall surface of the tank guide 41 is positioned inside the rotation locus D of the tip of the outer peripheral projection of the lid cover 206 of the lid member 203. Even if an attempt is made to move, the outer peripheral projection 209a of the lid cover 206 hits the tank guide 41 and restricts the opening rotation.

(Structure of Air Hole Closing Means) FIG. 14 is a side view showing the air hole closing means when the fuel tank is carried, and FIG.
FIG. 16 is a side view showing the air hole closing means when the fuel tank is mounted on the main body, and FIG. 16 is a view showing the relationship between the air hole closing means and the connection joint 47.

As shown in the figure, a small air hole 51 (having a diameter of about 1.5 mm) is formed on the upper surface side of the fuel tank 12 so that the inside of the fuel tank 12 is not in a negative pressure state. I have. This air hole 51 is provided to prevent fuel from being scattered outside the refueling tank for carrying.
Air hole closing means for preventing fuel in the tank from leaking out of the air hole 51 even when the refueling tank falls, and for opening / closing the fuel tank depending on whether or not the fuel tank is attached to the main body. 52 are provided.

The air hole opening / closing means 52 includes a valve 330 for opening and closing the air hole 51 of the oil supply tank 12, a tank valve lever 331 having the valve 330 mounted thereon, and a lever cover 332 for housing the tank valve lever 331. And a movable bar 333 for vertically moving the tank valve lever 331 and a lever spring 334 for urging the movable bar 333 downward.

One end of the tank valve lever 331 is supported by the slit 338 of the lever cover 332 so that a fulcrum 336 is provided.
The movable bar 333 is joined to the other end with some margin. The cushion cover 120 of the connection joint 47 is fixed to the open end side of the lever cover 332. The movable rod 333 is a tank valve lever 33
1 is moved up and down, and penetrates the central portion of the joint body 55 of the connection joint portion 47 and can be moved up and down. At the lower end of the movable rod 333, there is formed a contact seat 350 that comes into contact with the joint receiving portion 100 on the combustion section side. A lever spring 334 is interposed between the contact seat 350 and the lower surface of the connection joint body 55. I have.

The valve 330 is connected to the air hole 51 of the fuel tank 12.
The valve body 341 is provided with a pin-shaped valve body 341 whose top and bottom are moved up and down, and a seal packing 343 mounted on the root of the pin.

In the above configuration, the connection joint 47
In order to incorporate the air blocking means 52 into the joint, a movable rod 333 having a lever spring 334 fitted to the joint body 55 thereof is provided.
While the fulcrum 336 of the tank valve lever 331 is inserted into the slit 338 of the lever cover 332, and the other end of the tank valve lever 331 and the upper end of the movable rod 333 are connected and fixed by a speed nut to assemble.

When the fuel tank 12 is mounted on the main body 1,
As shown in FIG. 15, the lower end contact seat 35 of the movable rod 333 attached to the connection joint 47 of the refueling tank 12 is provided.
When 0 contacts the connection joint receiving portion 100 on the combustion side, the movable rod 333 is pushed upward by the receiving portion 100, and the tank valve lever 331 also swings upward following this, and the tank valve lever 331 is moved upward. Since the valve 330 attached to the 331 also rises at the same time, the air hole 51 is opened, air flows into the fuel tank 12 through the air hole 51, and the internal pressure of the fuel tank 12 is always at atmospheric pressure. Become.

When the fuel tank 12 is taken out of the main body, the movable rod 333 separates from the connection joint receiving portion 100 on the combustion side as shown in FIG.
Since it is forcibly moved downward by the urging force of the valve 34, the valve 330 mounted on the tank valve lever 331 is also lowered at the same time, and the air hole 51 is closed. Therefore, the fuel does not scatter from the air holes 51 when the fuel tank 12 is carried, and the fuel in the fuel tank 12 does not spill even if the fuel tank 12 falls down.

(Structure of the connection joint) FIG. 17 is a schematic view of the oil-feeding joint and the joint receiver when the tank is inserted into the main body, and FIG. 18 is the oil-feeding joint and the joint receiver when the tank is mounted on the main body. FIG. 19 is a schematic view of the return oil side joint and its joint receiver when the tank is inserted into the main body, and FIG. 20 is a schematic view of the return oil side joint and its joint receiver when the tank is mounted on the main body.

As shown in the figure, the connection joint 47 on the tank side is formed by integrating the connection joint 13a on the oil supply side and the connection joint 17a on the return oil side. Each of the connection joints 13a and 17a has a cylindrical joint body 55, a valve mechanism 56 incorporated therein, and a valve that also serves as a spring receiver for the valve mechanism 56 by closing the upper end opening of the cylindrical body of the joint body 55. A presser 57 is provided, and the proximal flanges 55d of the main bodies 55 are connected to each other and integrated. The connection joint part 47 is formed in a concave part 12 formed in a right front corner on a side surface of the fuel tank 12.
d, and the oil holding tank 12 is
Is fixed to the bottom surface of the concave portion 12d with a screw 54f.

The valve mechanism 56 includes a cylindrical joint body 55.
A substantially conical valve body 59 for opening and closing the lower end opening of the valve body, an O-ring 60 attached to the conical portion of the valve body 59 and elastically contacting the closing surface of the main body 55, and for biasing the valve body 55 in the valve closing direction And a valve body spring 61 interposed between the head of the valve body 55 and the valve presser 57.

The valve mechanism 56 is used when the tank 5 is mounted.
5 is pushed upward by contacting the joint receivers 13b and 17b, thereby opening the valve to bring the oil supply path B and the return path C of the oil supply tank 12 into a communicating state. The valve body 59 is seated on the closing surface of the joint main body 55 by the urging force of (2) to close the valve.

Each joint body 55 is provided with a passage communicating with the oil supply tank 12, and the inner ends of the suction pipe 20 and the return pipe 24 are connected to each passage. The suction pipe 20 is formed in an inverted L-shape, the upper horizontal portion thereof is connected to the oil supply joint 13 a, and the lower end of the vertical portion reaches near the bottom surface of the fuel tank 12 to suck the fuel in the fuel tank 12. It is connected to the suction port 66. Return pipe 24
Is bent in an L-shape in the refueling tank 12, and its pipe outlet faces upward. This is because even if the fuel in the refueling tank 12 abnormally rises due to the temperature difference,
This is for preventing the fuel from inadvertently leaking to the combustion section side, with the pipe outlet projecting above the fuel level in the fuel tank 12.

On the other hand, a joint receiving portion 100 on the combustion portion side facing the joint portion 47 has a receiving main body 98 fixed to the upper surface of the tank guide fixing member 42 with a screw and an oil feed side juxtaposed to the receiving main body. It has a joint receiver 13b, a joint receiver 17b on the return oil side, and an air valve 18 arranged on the receiver main body 98b.

As shown in FIGS. 17 and 18, the oil-feed-side joint receiver 13b is a rod-shaped valve receiver 98a projecting upward from the center of a concave portion formed on the upper surface of the receiver main body 98.
And a substantially cylindrical connection packing 102 mounted on the upper surface of the receiving body 98 to cover and seal the periphery of the valve receiver 98a when the oil feed joint 13a is connected. In order to improve the oil pressure and to fulfill the function of guiding the oil feed side joint 13a, the packing 10
And a substantially cylindrical packing presser 103 fixed to the upper surface of the main body 98 with a screw by receiving the lower end flange of the oil supply side joint 13a when the oil supply side joint 13a is connected.
The valve element 59a is pushed by the valve receiver 98a to open the valve.

An annular groove 98b is provided around the valve receiver 98a.
Is formed, and a horizontal passage 98c communicating from the groove 98b to the electromagnetic pump 14 side is formed. This passage 98c rises from the middle to become an inverted U-shaped rising passage 98d, and the end thereof is connected to a pipe 21 that goes to the electromagnetic pump 14. The inverted U-shaped rising passage 98 d is provided for preventing fuel in the fuel tank 12 from inadvertently flowing toward the electromagnetic pump 14, and is provided inside the cylindrical portion 98 h integrally formed on the upper surface of the receiving main body 98. Is formed. The air valve 18 is fixed to the upper surface of the cylindrical portion 98h with a screw, and the outlet of the air valve 18 is open to the upper end of the inverted U-shaped rising passage 98d.

As shown in FIG. 3, the air valve 18 takes in air from outside the oil supply path B from the oil supply tank 12 to the electromagnetic pump 14 to shut off the fuel supply in the oil supply path. The outlet is connected to the inverted U-shaped rising passage 98d, and the air hole for air intake is connected to the branch pipe 23, and the air is supplied from the inside of the refueling tank 12 via the return oil side joint receiver 17b. It is designed to take in. The opening and closing operation of the air valve 18 is performed by the opening and closing operation of a built-in electromagnetic valve 18a. The other end of the branch pipe 23 connected to the air valve 18 is connected to the passage 98f of the joint receiver 17b on the return oil side.

The joint receiver 17b on the return oil side is shown in FIG.
As shown in FIGS. 9 and 20, the valve mechanism 105 is housed in the lower valve chamber of the valve hole 98e formed on the upper surface of the receiving body 98, and a passage 98f is formed in the side surface of the valve chamber in the horizontal direction. The main body 98 includes a first connection joint receiver 13.
Similarly to b, the connection packing 102 and the packing presser 103 are fixed around the connection packing 102.

The valve mechanism 105 includes a receiving valve body 106 for opening and closing the valve hole 98e, a receiving valve body cap 108 for closing the lower part of the valve chamber, and the cap and the receiving valve body 106.
And a spring 107 for urging the receiving valve body 106 in the valve hole closing direction, and an O-ring 109 fitted to the closing surface of the receiving valve body.

In the above configuration, when the fuel tank is mounted, the valve body 59 of the connection joint 13a is pushed by the valve presser 98a of the connection joint receiver 13b, and the valve is opened.
When the electromagnetic pump 14 is driven in this state, the fuel tank 1
The fuel in the pipe 2 is sucked from the suction pipe 20, passes through the connection joint 13, passes through the passages 98c, 98d, and
1 is sent to the vaporizer 15 via the electromagnetic pump 14.

On the other hand, between the return oil side joint 17a and the joint receiver 17b, when the valve element 59 of the return oil side joint 17a pushes the receiving valve element 106 by mounting the oil supply tank 12, first, the receiving valve element 106 Is pushed downward to open the valve, and thereafter, after the receiving valve body 106 reaches the lowermost position, the receiving valve body 106 pushes it in the opposite direction to open the valve body 59.

As a result, when the electromagnetic pump 14 is stopped at the time of fire extinguishing or ignition and the electromagnetic valve 501 is opened, the combustion gas remaining inside the carburetor or in the path is removed from the pipe 21 through the bypass having the electromagnetic valve 501 interposed. , Once enters the rising passage 98d, passes through the inside of the air valve 18, passes through the second connection joint 17, and returns to the refueling tank through the return pipe 24. Thereby, the combustibility and odor at the time of extinguishing or igniting can be reduced.

(Configuration of Refueling Tank Bottom Side) FIG. 21 is a sectional view showing the bottom side of the refueling tank 12. As shown in the figure, on the bottom side of the refueling tank 12, a water detecting means 68 for detecting water generated in the refueling tank and a fuel amount detecting means 69 for detecting the amount of fuel in the refueling tank 12 are provided. ing. The water detecting means 68 includes a conductive water receiving tray 71 provided on a conductive tank bottom surface for storing water, an electrode 72 contacting the water receiving tray 71, and an electrode 73 contacting the bottom of the fuel tank 12. , Water tray 71 and refueling tank 12
Packing 74 as an insulator for electrically insulating
And water is detected based on a difference in electric resistance between the water stored in the water receiving tray 71 and the fuel.

The water receiving tray 71 is formed separately from the tank 12 using a stainless steel plate in order to prevent the generation of rust. The water receiving tray 71 has a dish-shaped concave upper surface.
A peripheral flange extending outward in the radial direction is attached to the tank bottom in a state of being sandwiched between packings 74 on the outer peripheral portion. The packing 74 is fixed to the tank mounting hole 1 by a ring-shaped pressing member 75 and a screw 76 arranged on the lower surface thereof.
2e.

The electrode 72 on the water receiving tray 71 and the electrode 73 on the tank side are both attached to the detection table 40 outside the refueling tank 12. The electrode 72 on the water receiving pan 71 side is
The protruding portion is a needle-like electrode or a line-shaped electrode that comes into contact with the outer surface of the water receiving tray 71 in a state where the tank 12 is placed, from the bottom wall of the water receiving tray housing concave portion 0.
The tank-side electrode 73 is a needle-shaped electrode that is exposed on the outer mounting surface of the detection table 40 and contacts the bottom surface of the tank 12 when the tank 12 is mounted.

By connecting the two electrodes 72 and 73 to a power source, the water source tray-side electrode 72, the water tray 71, the fuel or water on the inner surface thereof, the tank bottom surface, the tank-side electrode 73,
And an electric closed circuit leading to the power supply,
1 Due to the difference in electric resistance of the liquid (fuel or water) inside,
It can detect the presence of water.

As shown in FIG. 7, a tank leg 50 for guarding the water receiving tray 71 is welded to the bottom of the fuel tank 12 as shown in FIG. When the oil tank 12 is taken out of the main body 1 and the oil is supplied with the oil port 24 upward by the tank leg portion 50, foreign matter or the like may be present on the bottom surface of the oil tank 12 and the surface in contact with the water receiving tray 71 side. Even so, it protects against scratches and dents to prevent malfunctions in water detection.

As shown in FIG. 21, the fuel amount detecting means 69 is turned on in accordance with the approach / separation operation of the float 77 in which a magnet 78 which is disposed inside the tank 12 and functions as a part to be detected is built. A reed switch 79 installed on the detection table 40 side facing the float 77 so as to be turned off;
And

The float 77 is housed in a water-permeable tubular guide 80 with a canopy so as to be able to move up and down as the fuel level fluctuates, with the magnet disposed on the lower side. The lower end surface is integrally fixed to the inner surface side of the water receiving tray 71 of the water detecting means 68.

The reed switch 79 is fixed to the lower surface of the central recess of the detection table 40 so as to face the float 77. The guide 80 protects a commercially available refueling hose from coming into contact with the float 77 when the fuel in the refueling tank 12 is drained.

In such a configuration, the fuel tank 1
When the fuel inside the fuel tank 2 decreases and reaches a certain liquid level, the float 77 moves down and its magnet causes the reed switch 7 to move downward.
9 can perform a sensing operation to notify of running out of fuel or the like.

A detection lever for detecting whether or not the tank is mounted may be provided at a portion corresponding to the rear side of the main body.

[Other Embodiments] It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made within the scope of the present invention. For example, regarding the engagement structure between the lid member and the base, in the above embodiment, the notch 201d and the guide groove 201e are provided on the base side.
Are described, and the engagement projection 208c is arranged on the stopper 208 side, but the notch 201d and the guide groove 2
01e is arranged on the side of the fitting, and the engaging projection 208c is
The embodiment may be arranged on the 01 side. Similarly,
The arrangement of the guide groove 202g and the guide pin 204c is as follows.
Contrary to the above embodiment, a mode in which the guide groove is arranged on the lid base and the guide pin is arranged on the guide member may be adopted.

Further, in the above-described embodiment, the projections serving both as the slip preventing means of the lid cover and the opening regulating means of the lid member have been described. However, each of these may be configured to have a single function. For example, knurling may be applied to the outer peripheral surface of the lid cover to provide slip prevention means, and separately from this, a rotation preventing projection may be formed on the outer circumference of the lid cover to serve as opening restriction means for the lid member.

[0101]

As is apparent from the above description, according to the present invention, the opening and closing of the lid member is performed by a two-stage operation of a rotation operation around the oil supply port and a rotation operation around the axis. Prevents the mouth from being inadvertently opened.Also, since the contact surface of the lid member with the base is made of metal, it is rarely damaged even if it is affected by heat, and fuel leakage from the tank It can be used without worry.

[Brief description of the drawings]

FIG. 1 is a perspective view of a petroleum heating apparatus according to the present invention as viewed from the front of a main body.

FIG. 2 is a perspective view of the same oil heating device as viewed from the back of the main body.

FIG. 3 is a schematic diagram showing a liquid fuel combustion apparatus and a fuel path in the oil heating apparatus of FIG. 1;

FIG. 4 is a diagram showing a state in which the front plate side of the main body of FIG. 1 is partially cut;

FIG. 5 is a side sectional view of a main body combustion part.

FIG. 6 is a plan view of a fuel tank storage chamber.

FIG. 7 is a perspective view of the refueling tank viewed from the back side.

FIG. 8 is a side view of a tank filler port.

FIG. 9 is a sectional view of the same.

FIG. 10 is an exploded perspective view of the fuel supply port closing means.

FIG. 11 is a plan view of a fuel filler side member.

FIG. 12 is a plan view showing a state in which the lid member overlaps the fuel filler member.

13A is a plan view showing an open posture of a cover member, and FIG. 13B is a plan view showing a closed state of the cover member.

FIG. 14 is a side view showing the air hole closing means when the fuel tank is carried.

FIG. 15 is a side view showing the air hole closing means when the fuel tank is attached to the main body.

FIG. 16 is a schematic diagram showing a relationship between a connection joint on the fuel tank side and an air hole closing means.

FIG. 17 is a schematic view of an oil supply side joint and a joint receiver when the tank is inserted into the main body.

FIG. 18 is a schematic view of an oil supply side joint and a joint receiver when the tank body is mounted.

FIG. 19 is a schematic diagram of a return oil side joint and a joint receiver when the tank is inserted into the main body.

FIG. 20 is a schematic view of a return oil side joint and a joint receiver when the tank body is mounted.

FIG. 21 is a sectional view showing the bottom side of the fuel tank.

FIG. 22 is a schematic partially omitted front sectional view showing an example of a conventional oil fan heater;

FIG. 23 is a side sectional view of FIG. 22;

FIG. 24 is a cross-sectional view of a fueling cap and a receiver of a fueling tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Outlet 3 Operation part 4 Tank lid 5 Placement table 6 Front plate 7 Side back plate 8 Upper plate 9 Convection fan 10 Convection guard 11 Temperature sensor 12 Oil supply tank 13 First connection means 14 Oil pump (electromagnetic pump) Reference Signs List 15 carburetor 16 burner 17 second connection means 18 shutoff valve (air valve) 19 oil supply port closing means 21, 22 pipe 23 branch pipe 24 return pipe 25 combustion section 26 combustion section frame 28 burner box 30 combustion chamber 40 detection table 41 tank Guide 42 Tank guide fixing member 201 Cap 202 Guide member 203 Lid member 204 Lid base 205 Shaft 206 Lid

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E084 AA05 AA12 AA22 AB03 BA02 CA01 DA01 DB14 FA06 GA01 GA06 GB01 GB06 GB13 GB26 KA11 3K068 AA15 CB03 CB12 CC01 CC02 CC08 CC12

Claims (10)

[Claims] 1. A fuel supply port which is detachably mounted in a main body of a liquid fuel combustion device, a fuel supply port for supplying fuel is disposed above the tank, and a fuel supply port closing means for closing and opening the fuel supply port is provided. A refueling tank, wherein the refueling port closing means includes a lid rotatable around a base of the refueling port, and rotatable about an axis with respect to the refueling port. A refueling tank which is set to open and close by a two-stage operation of a rotation operation around the base and an opening and closing rotation operation around an axis. 2. The refueling port closing means includes a lid member rotatable along a guide member provided around a cap of the refueling port, and the lid member rotatably rotates around the cap. A lid base engaged with the member, and a lid capable of opening and closing a refueling opening around an axis orthogonal to a rotation center axis of the lid base; An engagement projection formed on one of the base and the base, a notch formed on the other of the lid and the base and allowing the engagement of the engagement projection in a closed posture with respect to a lid base of the lid, and 2. The refueling tank according to claim 1, further comprising a guide groove formed in the notch hole so as to extend in a rotation direction around the base. 3. The fuel tank according to claim 1, wherein a spring is provided between the lid and the lid base to bias the lid in an opening direction. 4. An arc-shaped guide groove formed on one of the guide member and the lid base, and a guide pin provided on the other to be engaged with the guide groove. 4. The refueling tank according to claim 1, wherein the length is set to a length capable of guiding the engaging projection from the start end to the end of the guide groove. 5. The guide groove has a groove shape which is inclined downward from a start end to a terminal end, and a locking portion for locking the engagement protrusion is provided at an end of the guide groove, and the guide of the engagement protrusion is provided. 5. The refueling tank according to claim 4, wherein the lid is set so as to be pressed toward the inside of the tank when the groove ends are locked. 6. A lid packing is provided at a portion of the lid which comes into contact with an upper end of a base, and the lid packing is set to be elastically contacted with an upper end of the base in a state where the guide groove end of the projection is locked. 5. The refueling tank according to any one of 5. 7. The refueling tank according to claim 1, wherein a portion facing the lid and the base is covered with metal. 8. The refueling tank according to claim 1, wherein a non-slip means is provided around the lid. 9. A receiving portion for receiving a filter for removing fuel dust and dust is provided on a base of the filler port.
The refueling tank according to any one of the above. 10. A liquid fuel combustion apparatus equipped with a fuel tank according to any one of claims 1 to 9, wherein opening of a lid member of a tank fuel port is restricted in a state where the fuel tank is housed in the apparatus body. A liquid fuel combustion device comprising means.