JPS6256402B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a liquid fuel combustion system in which a rotating shaft is rotated to raise a wick, and when the wick is raised, the rotating shaft is reversely rotated by a spring force stored in a wick lowering spring to lower the wick. This relates to the core up/down mechanism of the device.

In this type of liquid fuel combustion device, for example, in a kerosene stove, a pinion provided on a rotating shaft held in a fixed tank is engaged with a rack provided on a wick holder that holds the wick, and the rotating shaft is rotated. A structure that allows the wick to move up and down is adopted, and when the wick is raised and liquid fuel is being burned, if an external impact such as an earthquake is applied, the wick will immediately lower automatically and extinguish the fire. Usually, a mechanism is provided in which force is stored in a core lowering spring when the core is raised, and this core lowering spring is actuated by a vibration sensing device.

In kerosene stoves that use this kind of wick lowering spring, if you remove the wick holder when replacing the wick with the wick lowered, the rotating shaft can be rotated freely. As a result, when the kerosene stove is used again after replacing the wick, the amount of stored force in the wick lowering spring will not be appropriate, and the lowering of the wick by the wick lowering spring will be incomplete due to insufficient storage capacity, or In some cases, when raising the core, an excessive amount of force was stored, and the core lowering mechanism such as the core lowering spring was damaged.

The present invention has been developed in view of these points, and by regulating the rotation of the rotary shaft in the direction in which the core descends and setting the core to be replaced at the position where this rotation is restricted, a constant state is maintained at all times. This allows the rack and pinion to mesh with each other.

Next, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a fixed tank, and a core guide inner cylinder 2 is erected on the inner side of the fixed tank 1, and a core guide outer cylinder 3 is erected on the outer upper part of the fixed tank 1. A cylindrical core 4 is slidably inserted between the core guide inner cylinder 2 and the core guide outer cylinder 3, and is positioned above the core 4 so that the core guide inner cylinder 2
A double-tube type combustion cylinder 5 is placed over the upper part of the core guide outer cylinder 3 and the upper part of the core guide outer cylinder 3.

A cylindrical lead holder 6 is fitted onto the outer peripheral side of the lower part of the lead 4, and the lead 4 is held by the lead holder 6 via a number of projections (not shown) provided on the inner peripheral side of the lead holder 6. At the same time, an inclined rack 7 and a guide plate 8 are attached to the outer peripheral side of the core holder 6 in parallel.

Further, 11 is a rotating shaft, and this rotating shaft 11 is provided with a pinion 12 at its tip, and
A collar 13 having approximately the same outer diameter as the pinion 12 is fixed adjacent to this pinion 12 by a snap pin 14, and a bearing 15 as a fixed part is rotatably fitted to the rotating shaft 11 adjacent to this collar 13. , a mounting bracket 1 is attached to the other end of this bearing 15.
6 is attached via a gasket 17.

A cylindrical portion 18 having the same outer diameter as the collar 13 is protruded from one end of the bearing 15, and a ring body 19 is wound around the outer periphery of the opposing portion of the cylindrical portion 18 and the collar 13. A gap between the collar 13 and the cylindrical portion 18 is closed by the ring body 19. Note that the collar 13 and the cylindrical portion 1
The outer diameter of the portion of the ring body 8 around which the ring body 19 is wound is smaller than other portions by the thickness of the ring body 19, and the outer diameter of the ring body 19 is also smaller than that of the collar 13 and the cylindrical portion 18. It is formed to have the same outer diameter as the other parts.

Further, a coil spring 20 that is tightly wound and wound to the left is wound around the outer periphery of the collar 13, the ring body 19, and the cylindrical portion 18, and one end of this coil spring 20 is connected to the snap pin 14.
The other end is fixed to the bearing 15.
It is locked to a pin 21 implanted in the
The ring body 19 is located inside the center of the coil spring 20. The inner diameter of the coil spring 20 is formed to be slightly smaller than the outer diameter of the collar 13, the ring body 19, and the cylindrical portion 18, so that the collar 13,
When the coil spring 20 is wound around the ring body 19 and the cylindrical portion 18, the coil spring 20 comes into close contact with the collar 13, the ring body 19, and the cylindrical portion 18.

Then, the rotating shaft 11 is connected to the fixed tank 1.
The collar 13 is inserted into the fixed tank 1 through a mounting hole 22 provided on the outer circumferential side, and the pinion 12 at the tip is engaged with the rack 7.
is rotatably supported by a cylindrical support fitting 23 provided in the fixed tank 1, and the mounting fitting 16 is attached to the fixed tank 1 by a screw (not shown).
The bearing 15 is fitted into the mounting hole 22, and the mounting hole 22 is fitted into the packing 17.
It is sealed by.

The meshing relationship between the rack 7 and the pinion 12 is such that when the pinion 12 is rotated clockwise via the rotating shaft 11, the core holder 6 and the core 4 rise due to the inclination of the rack 7, and the pinion 12 is rotated counterclockwise. When the pinion 12 is rotated a predetermined amount counterclockwise, the engagement between the rack 7 and the pinion 12 is released. This allows the core 4 to be replaced. and,
At this time, since the coil spring 20 is wound to the left, when the rotating shaft 11 is rotated clockwise, that is, in the direction of raising the core, the winding diameter of the coil spring 20 increases, and when the rotating shaft 11 is rotated counterclockwise, that is, in the direction of raising the core. When the coil spring 20 rotates in the downward direction, the winding diameter of the coil spring 20 becomes smaller, and after the core 4 has completely descended, the rotating shaft 11 is rotated counterclockwise by a predetermined amount, and the engagement between the rack 7 and the pinion 12 is released. When the core 4 can be replaced, the coil spring 20 is tightly wound around the collar 13, ring body 19, and cylindrical part 18, and no further
The rotating shaft 11 cannot be rotated counterclockwise.

In addition, a spring cover 3 is attached to the outer surface of the mounting bracket 16.
1 is fixed, and a spring case 32 for this spring cover 31 is rotatably fitted to the rotating shaft 11, and an outer cylinder part 33 and an inner cylinder part 3 of this spring case 32 are connected to each other.
A left-handed coil-shaped core lowering spring 35 is housed between 4 and 4, and one end of this core lowering spring 35 is locked to a spring stopper 36 formed on the spring cover 31, and the other end is formed on the spring case 32. It is locked by a spring stopper 37.

As shown in FIG. 2, a ratchet plate 38 is integrally provided on the outer periphery of the spring case 32, and as shown in FIG. 3, a triangular recess is provided at the outer end of the spring case 32. 39 are provided,
A shaft pin 40 is screwed into and erected approximately in the center of the recess 39, and a substantially dog-shaped flexible pin 41 is provided in the recess 39 and is rotatable within a certain range in both directions using the shaft pin 40 as a fulcrum. , selectively engages with both end portions of the flexible pin 41, and connects the spring case 32 to the spring cover 3.
A drive pin 42 that locks against the rotary shaft 11 to prevent it from coming off is provided upright on the rotating shaft 11. Note that 43 is a cover that also serves to prevent the drive pin 42 from coming off, and is fixed by a snap washer 44.

An engagement pin 47 at the tip of an actuating lever 46 of the vibration sensing device is engaged with the serrated engagement portion 45 of the ratchet plate 38, and when the ratchet plate 38 rotates clockwise in this state, the The engagement pin 47 sequentially moves the engagement portion 45 of the ratchet plate 38 to prevent the spring case 32 from rotating counterclockwise, and gradually reduces the winding diameter of the core lowering spring 35 to accumulate reversal torque. It is becoming more powerful. Note that due to the relationship between the flexible pin 41 and the drive pin 42, which will be described later, when the amount of stored force of the core lowering spring 35 is "0", the coil spring 20 is in close contact with the collar 13, the ring body 19, and the cylindrical part 18. When the core 4 is wrapped, the rotary shaft 11 can no longer rotate counterclockwise, and the rack 7 and pinion 12 are disengaged, allowing the core 4 to be replaced.

Next, the effects of the above configuration will be explained mainly with reference to FIGS. 2 and 3.

2a and 3a show the relationship between the flexible pin 41 and the drive pin 42 when the core 4 is raised while accumulating reverse torque in the core lowering spring 35,
In this case, when the rotary shaft 11 is rotated clockwise via a dial knob (not shown), the drive pin 42 fixed to the rotary shaft 11 rotates in the direction of the arrow and is pushed against the outer end of the flexible pin 41 on one side. At the same time, the outer end of the other side of the flexible pin 41 contacts the wall surface of the recess 39 in the spring case 32, and in this state, the spring case 32 itself also rotates clockwise until the core 4 is completely raised. become.

Furthermore, FIGS. 2b and 3b show the relationship between the flexible pin 41 and the drive pin 42 when the wick 4 is lowered with the dial knob to extinguish the fire in a state where the reversing torque is stored in the wick lowering spring 35. showing the relationship,
In this case, when the rotating shaft 11 is rotated counterclockwise, that is, in the direction of the arrow, the drive pin 42
When it rotates once and enters the second rotation, as shown in the figure, it presses against the inner end of one side of the flexible pin 41 and reversely moves the flexible pin 41,
After disengaging from the flexible pin 41, approximately 1
As it rotates, the core 4 will come down completely.

Furthermore, FIGS. 2c and 3c show that in a state in which a reversing torque is stored in the core lowering spring 35,
The relationship between the flexible pin 41 and the drive pin 42 is shown when the core 4 is raised from the lowest position. In this case, when the rotating shaft 11 is rotated clockwise, that is, in the direction of the arrow,
After the drive pin 42 has rotated approximately one rotation, as shown in the figure, the drive pin 42 presses against the inner end on the other side of the adjustable pin 41, and
The flexible pin 41 is rotated, disengaged from the flexible pin 41, and rotated once, whereby the relationship between the drive pin 42 and the flexible pin 41 is again as shown in FIGS. 2a and 3a above. It will be in the state shown below.

In the above operation, when performing a series of movements other than those shown in FIGS. 2a and 3a, the spring case 32 is moved so that the engagement pin 47 of the actuating lever 46 of the vibration sensing device engages with the engagement portion of the ratchet plate 38. 4
5, it is kept in a fixed state.

On the other hand, when the seismic device is activated due to an earthquake or by operating a fire extinguishing lever (not shown), the operating lever 46 of the seismic device relative to the ratchet plate 38 is activated.
When the swivel pin is disengaged, the reversing force stored in the core lowering spring 35 causes the spring case 32 to rotate counterclockwise more rapidly than the state shown in FIGS. 41 is the drive pin 42
The core 4 is lowered via the rotating shaft 11 while pressing and rotating.

If the actuation lever 46 of the vibration sensing device is disengaged from the ratchet plate 38 in the state shown in FIGS. 2b and 3b, when the spring case 32 starts rotating counterclockwise and completes one rotation. , the drive pin 4 is connected to one side outer end of the flexible pin 41.
2 come into contact with each other, and the relationship between the adjustable pin 41 and the drive pin 42 becomes the same as that shown in FIGS. At this time, the rotary shaft 11 makes one more rotation, so in this case as well, the flexible pin 41 moves to the drive pin 4.
2 is pressed and rotated to completely lower the core 4.

Although any of the above-mentioned operations can be performed freely, it is important to rotate the rotating shaft 11 when the core 4 is raised and set the spring case 32 once the reversing force is stored in the core lowering spring 35. For example, the rotation of the rotating shaft 11 when raising and lowering the core 4 is performed in a state that is independent of the core lowering spring 35, and can therefore be performed with a small force.

Furthermore, when replacing the wick 4, after the wick 4 has been lowered, the rotating shaft 11 is further rotated a predetermined amount in the counterclockwise direction. In this case, the combustion cylinder 5 and the wick guide outer cylinder 3 are Even if the core 4 is removed together with the core holder 6, the coil spring 20 remains in the collar 1.
3. Since the ring body 19 and the cylindrical part 18 are tightly wound, the rotating shaft 11 cannot be rotated counterclockwise, and even if an attempt is made to rotate the rotating shaft 11 clockwise, the center lowering spring 35 tries to push it back, and as a result, pinion 1 of rotating shaft 11
When the lead 2 is rotated counterclockwise or clockwise and is not engaged with the rack 7 of the lead holder 6 after the lead 4 is replaced, when the lead 4 is used again after the lead 4 is replaced,
The reversing torque of the core lowering spring 35 does not become insufficient or excessive, and when the seismic device is activated, the fire can be reliably extinguished and the core lowering spring 35 is not damaged.

In addition, when replacing the core 4, there is a possibility that the pinion 12 of the rotating shaft 11 is forced to rotate clockwise and meshes with the rack 7 of the core holder 6 after the core 4 is replaced. The winding diameter of the core lowering spring 35 becomes smaller due to the rotation of the spring case 32 before the pinion 12 is engaged with the rack 7.
Before the core lowering spring 35 rises to a predetermined position, the core lowering spring 35 tightly wraps around the inner cylindrical part 34 of the spring case 32, making it impossible to rotate the rotary shaft 11 any further clockwise, and causing the user to malfunction. This makes it possible to prevent damage to the core up/down mechanism and the core drop spring 35 due to excessive force being applied to the core drop spring 35.

Also, the rotating shaft 11, collar 13, snap pin 14, bearing 15, mounting bracket 16, packing 1
7. Parts such as the ring body 19, coil spring 20, pin 21, spring cover 31, spring case 32, core lowering spring 35, shaft pin 40, swivel pin 41, drive pin 42, cover 43, and snap washer 44 are attached to the rotating shaft 11 can be constructed as one mechanical part, and can be easily assembled by attaching the mounting bracket 16 to the fixed tank 1 with screws. Since the assembly is performed in this condition, the user can easily replace the unit by hand by adjusting it in advance as a service unit.

In addition, since the central part of the coil spring 20 is located at a part facing the rotating collar 13 and the cylindrical part 18 of the fixed bearing 15, if the coil spring 20 is connected to the collar 13, the ring body 19, and the cylindrical part From the state in close contact with 18, rotate shaft 11
When the coil spring 20 is further rotated counterclockwise, both ends of the coil spring 20 wrap around the collar 13 and the cylindrical part 18, and the coil spring 20
A rotational frictional force is generated between the collar 13, the coil spring 20, and the cylindrical portion 18, and both ends of the coil spring 20 do not slip, so if you forcefully try to rotate the rotating shaft 11 counterclockwise,
The load acts as a tensile load on the central part of the coil spring 20, that is, the material of the coil spring 20 on the ring body 19, and no load is applied to the locking parts at both ends, so the coil spring 20 is attached to the snap pin 1.
4 or the pin 21, and the collar 13 and the cylindrical portion 18
Since the ring body 19 closes the gap between the coil springs 3 and 3, deformation of the coil spring 3 at this time can be prevented.Furthermore, since the coil spring 20 is tightly wound, when the rotating shaft 11 is rotated clockwise, The amount of deformation per turn of the coil spring 20 can be reduced.

Furthermore, since the inner diameter of the coil spring 20 is smaller than the outer diameter of the collar 13, the ring body 19, and the cylindrical portion 18, when the rotating shaft 11 is rotated counterclockwise, the coil spring 20 is Since the spring 20 is in close contact with the collar 13, the ring body 19, and the cylindrical part 18, and the outside diameters of the collar 13, the ring body 19, and the cylindrical part 18 are the same, the coil spring 20
As a result, a stable rotational friction force can be obtained in the coil spring 20.

According to the present invention, when replacing the core 4, when the core 4 is lowered and removed together with the core holder 6, the coil spring 20 is tightly wound around the collar 13 and the cylindrical portion 18. Since the rotation of the rotary shaft 11 in the core downward direction is restricted by the coil spring 20, the rotation of the rotary shaft 11 is restricted when the core 4 is replaced.
does not rotate in the core-lowering direction, and even if the rotating shaft 11 is attempted to rotate in the core-raising direction, the core-lowering spring 35 tries to push it back, causing the pinion 12 of the rotating shaft 11 to rotate counterclockwise or counterclockwise. When the core 4 is rotated clockwise, it does not engage with the rack 7 of the core holder 6 after the core 4 is replaced. Therefore, when the core 4 is replaced, the stored force of the core lowering spring 35 does not go out of order, and the core 4 When the core lowering spring 35 is used again after replacement, the reversing torque of the core lowering spring 35 does not become insufficient or excessive, and when a seismic device or the like is activated, the core 4 can be reliably lowered to extinguish the fire. , damage to the core lowering spring 35 due to overwinding can be prevented.

Further, the coil spring 20 is wound around the rotating shaft 11 via the collar 13 and the cylindrical part 18 of the bearing 15, and the center part of the coil spring 20 is connected to the rotating collar 13 and the fixed bearing 1.
Since the coil spring 20 is located in the opposite part to the cylindrical part 18 of the collar 13 and the cylindrical part 18, if the coil spring 20 is in close contact with the collar 13 and the cylindrical part 18,
If you try to rotate 1 further in the direction of core descent,
Both ends of the coil spring 20 are wound around the collar 13 and the cylindrical part 18, and the coil spring 2
0 and the collar 13, the coil spring 20 and the cylindrical part 18, and the both ends of the coil spring 20 do not slip. , the load acts as a tensile load on the material at the center of the coil spring 20, and no load is applied to the locking portions at both ends.
The locking parts at both ends of 0 will not come off, and furthermore,
By making the inner diameter of the coil spring 20 smaller than the outer diameters of the collar 13 and the cylindrical portion 18, when the rotating shaft 11 is rotated in the center-downward direction, the coil spring 20 is moved to the collar before a load is applied to the coil spring 20. 13 and the cylindrical portion 18, stable rotational frictional force can be obtained on the coil spring 20, and rotation of the rotating shaft 11 can be reliably regulated.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional side view with a part of the liquid fuel combustion device cut away, and Fig. 2 a, b, and c show the main parts due to the rotation of the respective rotating shafts. Front view showing the related state of FIG. 3a,
b and c are plan views showing the relationship between the respective drive pins and the flexible pins; DESCRIPTION OF SYMBOLS 1... Fixed tank, 4... Core, 6... Core holder, 7... Rack, 11... Rotating shaft, 12... Pinion, 13... Collar, 15... Bearing, 18...
... Cylindrical part, 19 ... Ring body, 20 ... Coil spring, 32 ... Spring case, 35 ... Core lowering spring, 38 ... Ratchet plate, 45 ... Engagement part, 46 ... Actuation lever, 47 ...Engagement pin.

Claims (1)

[Claims] 1. A wick 4 is provided in a fixed tank 1 so as to be able to be raised and lowered via a wick holder 6, and a rack 7 is attached to the wick holder 6.
A rotary shaft 11 is supported on the fixed tank 1 via a bearing 15, a pinion 12 meshed with the rack 7 is provided at the tip of the rotary shaft 11, a spring case 32 is attached to the rotary shaft 11, A coiled core lowering spring 35 is installed inside this spring case 32.
The core lowering spring 35 is connected to the rotating shaft 11.
One end is fixed to the fixed part on the fixed tank 1 side, and the other end is fixed to the spring case 32 so that the spring force for lowering the core is stored by rotation in the direction of raising the core. A ratchet plate 38 is provided, and a serrated engagement portion 45 of the ratchet plate 38 is provided.
The engagement pin 47 at the tip of the operating lever 46 is engaged with the collar 13 to fix the collar 13 to the rotating shaft 11, and a cylindrical portion 18 is provided protruding from the bearing 15 opposite to the collar 13. A coil spring 20 is wound around the outer periphery of the collar 13 and the cylindrical part 18, and the coil spring 20 has an inner diameter slightly smaller than the outer diameter of the collar 13 and the cylindrical part 18, and has a centering point around the rotating shaft 11. One end is fixed to the collar 13 so that the winding diameter decreases when rotating in the downward direction, and the other end is fixed to the bearing 15. When the amount of force stored in the core lowering spring 35 is minimum, the collar 13 and the cylindrical shape A wick up-and-down mechanism for a liquid fuel combustion device, characterized in that the wick is tightly wound around a part 18. 2. The center portion of the coil spring 20 is located at a portion facing the collar 13 and the cylindrical portion 18 of the bearing 15, and the collar 13 and the cylindrical portion 18 of the bearing 15 are located inside the center portion of the coil spring 20. 2. The wick up-and-down mechanism for a liquid fuel combustion device according to claim 1, further comprising a ring body 19 that closes a gap between the wick and the wick. 3. The wick up-and-down mechanism for a liquid fuel combustion device according to claim 2, wherein the outer diameters of the collar 13, the cylindrical portion 18 of the bearing 15, and the ring body 19 are formed to have the same dimensions.