JPS6056962B2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a liquid fuel combustion device.

A liquid fuel combustion apparatus previously proposed by the present inventors will be explained based on FIGS. 1 to 3.

Reference numeral 1 designates a fixed tank formed by joining an upper side plate 1a and a lower side plate 1b together by tightening, and an inner cylinder 2 for guiding the core is erected by welding on the inner side of the fixed tank 1. A cylindrical lamp wick 3 is fitted onto the outer circumferential side of the inner tube 2 so as to be slidable in the vertical direction while being held by a wick holder 4.
Further, a rack base 5 is fixed to the outer side of the core holder 4 by spot welding or the like.
A rack 6 for vertically moving the lamp wick is fixed to the lower part of the lamp.

Further, the outer end of a cylindrical mounting bracket 7 is integrally fixed to a predetermined position on one side of the fixed tank 1, and a bolt serving as a bearing body has a guide hole 8 in the mounting bracket 7 from the outside. 9 is screwed on. Reference numeral 10 denotes an operating shaft, the inner side of which is rotatably penetrated into the mounting bracket 7 through the guide hole 8 of the bolt 9, and the inner end of which is attached to the rack 6. A pinion 11 that meshes with the pinion is fixed.

A collar 1''2 is rotatably fitted on the inner side of the operating shaft 10 so as to be in contact with the upper part of the guide hole 5a of the rack base 5. The side portion is rotatably fitted into the inner side portion of the mounting fitting 7, thereby preventing the operating shaft 10 from swinging.

- Also, an O-ring 13 serving as an oil leakage prevention ring is fitted onto the operating shaft 10 so as to be positioned relative to the outer end of the collar 12, thereby preventing oil leakage. Further, on the outside of the fixed tank 1, a locking screw 16 is screwed orthogonally to the operating shaft 10 through a screw hole 17. A presser fitting 18 is integrally fitted to the operating shaft 10, and a torsion coil-shaped return spring 20 is housed in an annular groove 19 formed on the inner side of the presser fitting 1''. One end is locked to a locking hole 21 provided in the retainer 18, and the other end of the return spring 20 is locked to a locking plate 20 fixed to the fixed tank 1 side. There is.

Further, a circular protrusion 231 is protruded from the outer side of the holding fitting 18, and this circular protrusion 23. Against ratchet plate 2
4 is rotatably fitted to the ratchet plate 24 via an annular spring holder 25 spot-welded to the ratchet plate 24, and a square projection 23b is protruded from the outside of the circular projection 231. A cover body 26 is integrally fitted and locked to the portion 23 through the square hole 26, and a drive spring 27 is wound around the outer peripheral surface of the spring holder 25 by its own elasticity. At the same time, the tip end thereof is locked to a locking portion 28 formed on the cover body 26.

The cover body 26 is crimped and locked to the spring holder 25 by an elastic retaining ring 29, and in this state, the operation dial 30 is integrally fitted to the outer end of the operation shaft 10. It is worn. The rack teeth 6'' of the rack 6 have a horizontal portion 61, a curved portion 6, and an inclined portion 6.

Further, the upper part of the guide hole 51 of the rack base 5 is provided outwardly through the stepped part 5b so as to be parallel to the rack 6 in a state where it is located further outward than the rack 6. . Note that 31 is an outer cylinder for guiding the core, 32 is a combustion cylinder, 33 is a heat shield plate that prevents the heat of the combustion cylinder 32 from being radiated downward, 34 is kerosene as fuel, and 35 is its oil surface.

In such a configuration, when the operating shaft 10 is rotated clockwise through the operating dial 30 during combustion, the rack 6 meshed with the pinion 11 at the fixed position of the operating shaft 10 is rotated.
moves to the left, and at this time, the rack base 5, which moves to the left together with this rack 6, aligns with the guide hole 5. with respect to the collar 12 in the fixed position. The integrated lamp wick 3 rises while rotating via the rack base 5 and the wick holder 4.

The upper end of the lamp wick 3 is located in the upper part of the fire pan in FIG. The spring 20 is rotated while resisting the spring pressure and being prevented from reversing by the locking piece of the vibration sensing device, whereby the return spring 20 is gradually twisted and stored. At this time, the rotational force of the holding fitting 18 integrated with the operating shaft 10 is transmitted to the ratchet plate 24- through the cover body 26, the drive spring 27, and the spring holder 25 tightened by the drive spring 27. In addition, when the lamp wick 3 is in the raised state, the lamp wick 3 is ignited and used for combustion, but when it is necessary to extinguish the fire urgently due to an earthquake or an external impact, the locking piece (not shown) is engaged with the ratchet plate 24. The stop is released and the return spring 20
The torsional force accumulated in the lamp 1 gives a counterclockwise rotation to the operating shaft 10, and this counterclockwise rotation of the operating shaft 10 causes a movement opposite to the above-mentioned movement during combustion use, and the lamp wick 3 is lowered. .

Note that during normal fire extinguishing, not emergency fire extinguishing such as during an earthquake, when the operation dial 30 is rotated counterclockwise, the ratchet plate 24 is stopped by the locking piece of the vibration device, but the drive spring 27 is stopped by the spring. It rotates together with the operating shaft 10 while sliding on the holder 25.

Now, there is room for improvement in the liquid fuel combustion device proposed above in the following points.

That is, when the lamp wick 3 descends, the internal volume of the fixed tank 1 decreases by the amount that the lamp wick 3 and the wick holder 4 descend, and the oil level 35 fluctuates due to the lamp wick 3 and the like.

As a result, the inside of the tank 1 is temporarily pressurized, and the vaporized gas filling the tank 1 rises through the slight gap between the lamp wick 3 and the inner cylinder 2 and outer cylinder 31, and moves up into the combustion cylinder 32.
Squirt inside. If this ejected vaporized gas is a trace amount, it will be completely burned by preheating inside the combustion tube 32, but in normal cases, the vaporized gas that has not been completely combusted becomes a flame and is ejected from the upper part of the combustion tube 32. They emit bad odors and pose a danger due to standing flames. In addition, the amount of flame emitted is large, and if flames are emitted outside the kerosene stove, there is a risk of igniting surrounding items and causing a fire. Moreover, this unfavorable flame phenomenon is caused by dial 3.
It is larger when the wick 3 is lowered instantaneously for emergency extinguishing than when the wick 3 is lowered at 0. It is also possible to reduce the descending speed of the wick 3 by setting the torsion storage force of the return spring 20 to a small value when the wick 3 rises to the highest level. The accumulated force may become smaller than the downward resistance of the lamp wick 3, and the lamp wick 3 may stop in the middle of its lowering. In order to completely lower the lamp wick 3 in this way, it is necessary to set the return spring 20 to store a force that is sufficiently greater than the downward resistance of the lamp wick 3, and in this case, the lamp wick 3 will not be exposed to shock during an emergency fire extinguishment. There is a problem that there are many dangerous standing flames. The present invention has been made in view of these points, and is designed to allow the lamp wick to descend slowly and completely.

An embodiment of the present invention will be described based on FIGS. 4 to 6.

Note that the same parts as those in the apparatus shown in FIGS. 1 to 3 are designated by the same reference numerals, and the explanation thereof will be omitted. A friction ring 12'' is rotatably fitted onto the operating shaft 10, and a pinion 41 is integrally formed or fixed to the inner side of the friction ring 12''. Further, the pinion 41 is attached to the upper side of the inclined portion of the guide hole 51 of the rack base 5.
Forming rack teeth 42 that mesh with. Further, a press ring 43 is fitted to the operating shaft 10 so as to be positioned relative to the outer end of the O-ring 13 serving as the oil leak prevention ring, and a locking screw 44 is screwed onto the operating shaft 10. One end of this locking screw 44 protrudes from the operating shaft 10, and the protruding portion of this screw 44 is fitted into the cut groove 45 in the axial direction of the press ring 43.

The protruding portion of the screw 44 allows the pressing ring 43 to
The press ring 4 rotates together with the operating shaft 10.
3 so that it can be slightly slid in the axial direction of the operating shaft 10. A compression coil spring 46 is fitted to the outer side of the pressing ring 43, and the outer end of the spring 46 is received by a spring retaining washer 47, which is fitted into an E-shaped retaining ring 48 fitted to the operating shaft 10. to lock. Then, the pressing ring 4 is pressed by the spring 46.
3, press the side surface of the O-ring 13, and press this O-ring 1.
3 is pinched between the pressure ring 43 and the friction ring 12'', thereby expanding the O-ring 13 in the direction perpendicular to the axial direction by the amount of side pressure applied to the O-ring 13. The kerosene leak prevention effect of 13 is maintained stably for a long time.In addition, pinions 11, 41 and rack teeth 6''
, 42. In FIG. 6, when the lamp wick 3 is at the lowest position, the horizontal part 6
At A, the pinion 11 and the rack teeth 6'' are engaged, and when the pinion 11 is engaged with the rack teeth 6" at the curved part 6B, the wick 3 begins to gradually rise, and the pinion is engaged at the inclined part 6C. 11 and the rack teeth 6'' are engaged, the wick 3 has risen to the highest position.

Further, when the lamp wick 3 moves from the curved part 6B to the inclined part 6C, the pinion 41 and the rack teeth 42 are made to mesh with each other. The range in which the pinion 41 and the rack teeth 42 mesh is the range H shown in the figure. ■It is provided throughout. Next, the operation of this embodiment will be explained. When the lamp wick 3 is located at the uppermost position, the pinion 11 and the rack teeth 6'' mesh at the inclined portion 6C, and the pinion 41 and the rack teeth 42 mesh at the meshing portion h1.

In this state, the operating shaft 10 rotates to the left and the pinion 11
Considering the case where the rack base 5 and the lamp wick 3 are lowered due to the engagement between the O-ring 13 and the rack teeth 6'',
The friction ring 12'' that is in close contact with one side is connected to the rack tooth 4.
The press ring 43, which is in close contact with the other side of the O-ring 13, rotates counterclockwise together with the operating shaft 10. That is, the ring 12'' and the pressing ring 43 rotate in opposite directions via the O-ring 13. At this time, the spring 4
6, a pressing force is acting on the contact surfaces between the O-ring nog 13, the friction ring 12'', and the pressing ring 43, and a rotational frictional force is generated on the contacting surface.This rotational frictional force is a pressing force. It acts to suppress the rotation of the ring 43 and the counterclockwise rotation speed of the operating shaft 10. That is, the lamp wick 3
In the range where the return spring 20 has a large accumulated force until the pinion 41 descends a distance H from the top, the pinion 41
The ring 12'' and the pressing ring 43 are rotated in the opposite direction so that the ring 12'' and the rack teeth 42 are engaged with each other, and the descending speed of the lamp wick 3 is suppressed.Furthermore, after the lamp wick 3 has descended a distance H from the top, Since the engagement between the pinion 41 and the rack teeth 42 is eliminated, the braking action on the operating shaft 10 is removed, and the remaining force stored in the return spring 20 acts on the operating shaft 10 as it is, so that the lamp wick 3 is securely held. It descends to the lowest position.

In this way, the wick 3 descends at an appropriate speed that is not shocking over its entire stroke, making it possible to suppress a sudden rise in gas pressure inside the tank 1 and waves in the oil level 35 as much as possible, especially during an emergency fire extinguishment. It can effectively prevent the flaming phenomenon and extinguishing odor that tend to occur in

Further, in this embodiment, since the rotation of the operating shaft 10 by the return spring 20 is suppressed by using the frictional force of the rubber O-ring 13, the frictional force of the O-ring 13 is the compressive pressing force of the spring 46. It is proportional to and stable, and any desired frictional force can be easily obtained from the O-ring 13. In this way, according to the present invention, the oil leakage prevention ring 1
A friction ring 12'' is attached to the operating shaft 10 in close contact with one side of 3.
A pinion 41 is integrally provided on this friction ring 12'', and the pinion 41 connects the rack teeth 42 of the rack base 5, which moves up and down together with the lamp wick 3, to the operating shaft 10. The press ring 43 is fitted to the operating shaft 10 so as to be rotatable together with the operating shaft 10, with the press ring 43 meshing so as to rotate in the opposite direction and tightly contacting the other side surface of the oil leakage prevention ring 13. Since the pressure ring 43 is provided with a spring 46 that biases the pressure ring 43 against the oil leakage prevention ring 13, the friction ring 12'' and the pressure ring 43 are pressed against the oil leakage prevention ring 13 when the wick 3 descends. While rotating in the opposite direction, the press ring 43 receives rotational frictional force from the oil leakage prevention ring 13 and is suppressed from rotating.The rotation force by the return spring 20 of the operating shaft 10, which is integrated with the press ring 43, is also suppressed, and the lamp wick Sudden descent due to the return spring 20 of No. 3 can be prevented.

Furthermore, since the pin 1 onion 41 and the rack teeth 42 are meshed together to obtain the rotation suppressing effect of the oil leak prevention ring 13, the rotation suppressing effect can be canceled by releasing the mesh. As a result, the operating shaft 10 is returned and the stored force of the spring 20 is effectively applied, so that the lamp wick 3 can be reliably lowered. Since the lamp wick 3 can be lowered slowly and reliably in this way, it is possible to prevent the occurrence of standing flames and extinguishing odors. Additionally, since impactful movements can be prevented, wear of moving parts and operating noise can be kept low.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the liquid fuel combustion device proposed earlier, Figure 2
Figure 3 is a perspective view of the inner end of the operating shaft, Figure 3 is a front view of the rack base, Figure 4 is a sectional view showing one embodiment of the liquid fuel combustion apparatus of the present invention, and Figure 5 is its FIG. 6 is a perspective view of the inner end portion of the operating shaft, and FIG. 6 is a front view of the rack base portion thereof. 3... Lamp wick, 5... Rack base, 6... Rack for vertical movement of the lamp wick, 10... Operating shaft, 11... Pinion for vertical movement of the lamp wick, 12... Friction ring, 13...・
O-ring as oil leak prevention ring, 20...Return spring, 41...Zenion, 42...Rack tooth, 43
...pressure ring, 46...spring.

Claims (1)

[Claims] 1. Attach a rack base to the outside of the lamp wick, which is provided to be able to move up and down, and fix a rack for vertical movement of the lamp wick to this rack base.A pinion for vertical movement of the lamp wick, which is fixed to the operating shaft, is engaged with this rack, and the pinion for vertical movement of the lamp wick is engaged with this rack. In a liquid fuel combustion device in which the lamp wick is moved up and down via a pinion for vertical movement of the lamp wick and a rack for vertical movement of the lamp wick, which are fixed to the pinion and rotated in the same direction by rotation, energy is stored when the lamp wick rises on the operation shaft. an oil leakage prevention ring is fitted to the operating shaft, and a friction ring is rotatably fitted to the operating shaft in close contact with one side of the oil leakage prevention ring;
A pinion is integrally provided on this friction ring, and rack teeth formed on the rack base, which moves up and down together with the lamp wick, are engaged with the pinion so that the pinion rotates in the opposite direction to the operating shaft. A pressure ring is fitted onto the operating shaft so as to be able to rotate integrally with the operating shaft, in close contact with the other side of the oil leak prevention ring, and a spring is provided on the pressure ring to bias the pressure ring against the oil leak prevention ring. A liquid fuel combustion device characterized by: