JPH0222844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wick up/down mechanism for a liquid fuel combustion device such as an oil stove.

[Technical background of the invention]

The lamp wick installed between the inner tube and the outer tube for guiding the wick is moved up and down by the rotation of the operating shaft, and when the operating shaft is rotated in the direction of raising the wick, a ratchet plate with a plurality of teeth on the outer periphery is rotated. As the latch moves, the teeth of this ratchet plate are sequentially locked with the locking body to store force in the core lowering spring, and by removing the locking body from the teeth of the ratchet plate, the ratchet is activated by the biasing force of the core lowering spring. In kerosene stoves with a wick up and down type in which the operating shaft is rotated in the wick lowering direction via a plate, the upper limit of the wick can be easily determined by a rack or stopper provided on the holder of the wick. This can be set as the upper limit of the range of adjustment of firepower, but as for the lower limit of the range of adjustment of firepower, unless the range of vertical movement of the wick during use is regulated by some kind of regulating means, it will exceed the range of adjustment of appropriate firepower. Since there is a possibility that the wick may be lowered, various proposals have been made to prevent the wick from being used with the wick lowered too much.

One of them is disclosed in Japanese Utility Model Application Publication No. 175320/1983.

This has a pair of protrusions on the ratchet plate, and a drive pin protrudes from the operating shaft between the pair of protrusions.After the lamp wick is completely raised, the pair of protrusions etc. The wick can be lowered by the amount that the drive pin can move between the two, and cannot be lowered any further.

[Problems with background technology]

By the way, in the case of the device shown in the above-mentioned Japanese Utility Model Publication No. 58-175320, if the user lights the lamp with the wick fully raised, that is, with the wick raised to the normal ignition position, there will be no problem. No, but
If the user raises the wick incompletely, e.g.
If the wick has only risen to a position corresponding to the lower limit of the firepower adjustment range, the wick is within the firepower adjustment range, so ignition is possible, and if the wick is lit in this state, Since the wick could be lowered further from this state, there was a possibility that combustion would occur with the wick lowered beyond the range of appropriate firepower adjustment.

[Purpose of the invention]

The present invention has been developed in view of the above-mentioned points, and even if the wick is ignited in a state where the wick is not fully raised due to an erroneous operation by the user, it will always be within the normal flame power adjustment range. The purpose is to allow combustion to take place.

[Summary of the invention]

In the present invention, a lamp wick provided between an inner cylinder and an outer cylinder for guiding the wick is moved up and down by rotation of an operating shaft, and a plurality of teeth are provided on the outer periphery when the operating shaft is rotated in the direction in which the wick rises. As the ratchet plate is rotated, the teeth of the ratchet plate are sequentially locked by the locking body to store force in the core lowering spring, and by removing the locking body from the teeth of the ratchet plate, the biasing force of the core lowering spring is In a wick up-and-down mechanism for a liquid fuel combustion device in which an operating shaft is rotated in the wick lowering direction via a ratchet plate, the above-mentioned ratchet plate is rotatably provided on the above-mentioned operating shaft, and like this ratchet plate, the above-mentioned An adjustment plate having a plurality of teeth on its outer periphery that is engaged with the locking body is fixed to the operating shaft adjacent to the ratchet plate, a protrusion is provided on either one of the ratchet plate and the adjustment plate, and the ratchet A pair of engaging portions are provided on the other of the plate and the adjusting plate to hold the protrusion movably within a predetermined range, and a toothless portion that is not locked by the locking body is provided in a predetermined range on the outer periphery of the adjusting plate, and the above-mentioned When the operating shaft rotates in the center upward direction, the protrusion engages with one of the pair of engaging sections to rotate the ratchet plate together with the adjustment plate in the direction in which the center lowering spring is loaded. The locking body is characterized in that the rotation range of the operating shaft is restricted within a predetermined range in which it engages with the toothless portion of the adjustment plate, and the firepower is adjusted within this range.

[Embodiments of the invention]

An embodiment of the wick up-and-down mechanism for a liquid fuel combustion device according to the present invention will be described with reference to the drawings.

FIG. 1 shows a part of a kerosene stove, 1 is a fixed tank, and an inner cylinder 2 for guiding the wick is erected from the bottom of the fixed tank 1, and the inner cylinder 2 is connected from the top of the fixed tank 1. A cylindrical lamp wick 4 is fitted between the inner cylinder 2 and the outer cylinder 3 so as to be vertically movable. A dual-tube type combustion tube 7 is mounted on fire pans 5 and 6 formed inside the upper part of the inner cylinder 2 and outside the upper part of the outer cylinder 3.

Further, a cylindrical wick holder 10 is fitted to the lower outer periphery of the lamp wick 4, and the lamp wick 4 is held in the wick holder 10 through a number of projections (not shown) provided on the inner periphery of the wick holder 10. At the same time, a rack 11 is attached to the outer periphery of one side of the lead holder 10.

Further, an outer end portion of a cylindrical mounting bracket 14 is fixed to one side of the fixed tank 1, and this mounting bracket 14 is fixed to one side of the fixed tank 1.
An operating shaft 16 with a gear 15 attached to the tip that meshes with the rack 11 is inserted inside the operating shaft 16, and between this operating shaft 16 and the mounting bracket 14, a collar 17 for positioning, a gasket 18 for preventing oil leakage, A packing washer 19 and a packing spring 20 are fitted in sequence, and a positioning bolt 22 having a shaft through hole 21 is fitted and screwed onto the mounting fitting 14.

Note that FIG. 1 shows a state in which the lamp wick 4 has risen completely, that is, at the upper limit of the firepower adjustment range, and ignition and combustion are possible. In this state, the operation shaft 16 is rotated counterclockwise. Then, due to the meshing relationship between the rack 11 and the gear 15, the lamp wick 4 can be lowered through the wick holder 10.

Further, a spring case 25 is rotatably fitted to the operating shaft 16 at a position outside the positioning bolt 22, that is, outside the fixed tank 1. is located and stored on the outer periphery of the operating shaft 16, one end of this center lowering spring 26 is locked to a spring stopper 27 fitted to the positioning bolt 22, and the other end of this center lowering spring 26 The portion is engaged with a notch 28 formed in the spring case 25.

A disc-shaped ratchet plate 32 having a plurality of serrated teeth 31 on the outer periphery is integrally formed on the outer end of the spring case 25, and like this ratchet plate 32, the outer periphery is also serrated. A disc-shaped adjustment plate 34 provided with a plurality of teeth 33 is fixed adjacent to the outer surface of the ratchet plate 32 to the operating shaft 16 via a fixing pin 35.

A protrusion 38 is provided on the outer surface of the ratchet plate 32, as shown in FIG. A toothless portion 39 is formed with a notch, and both side edges 40, 41 of this toothless portion 39 function as a pair of engaging portions, and the pair of edges 40,
41, as shown in FIGS. 4 and 5, the protrusion 38 of the ratchet plate 32 is held movably within a predetermined range.

Further, reference numeral 44 denotes a locking pin as a locking body, and this locking pin 44 is provided at the tip of a lever 45 that is operated by a vibration sensor (not shown) or a fire extinguishing operation button. , the locking pin 44 is normally biased in the direction of locking the saw-shaped teeth 31 and 33 on the outer periphery of the ratchet plate 32 and the adjustment plate 34;
As a result, the ratchet plate 32 and the adjustment plate 34
When the ratchet plate 32 and the adjustment plate 34 rotate clockwise, the locking pin 44 is regulated by the locking pin 44.
1 and 33 are moved sequentially.

Note that the locking pin 44 is connected to the toothless portion 39 of the adjustment plate 34.
When engaged, the adjustment plate 34 can rotate within the range of the toothless portion 39.

Further, an operating knob 48 is fitted to the outer end of the operating shaft 16.

Next, the operation will be explained.

When raising the lamp wick 4, when the operating shaft 16 is rotated clockwise via the operating knob 48, the lamp wick 4 is raised due to the meshing relationship between the gear 15 and the rack 11 of the wick holder 10.

At the same time, the adjustment plate 34 fixed to the operating shaft 16 also rotates clockwise, and the protrusion 38 of the ratchet plate 32 is pushed with one edge 41 of the toothless part 39 to adjust the ratchet. The plate 32 is integrally rotated clockwise, thereby causing the spring case 2 to
5 also rotates clockwise while accumulating reversing force in the core lowering spring 26, and the locking pin of the lever 45 sequentially locks on each tooth 31 of the ratchet plate 32 and each tooth 33 of the adjustment plate 34. The counterclockwise rotation of the spring case 25 is prevented.

When the lamp wick 4 rises to within a predetermined firepower adjustment range, the lamp wick 4 lights up and the kerosene can be burned. 39, so that the firepower can be adjusted within an appropriate predetermined range.

That is, when the lamp wick 4 is raised to the upper limit position of the firepower adjustment range where the lamp wick 4 has completely risen and the operating shaft 16 can no longer be rotated clockwise, the position shown in FIG. state, and in this state, the other edge 40 of the toothless portion 39 of the adjustment plate 34
It becomes possible to adjust the firepower by rotating the operating shaft 16 counterclockwise, that is, in the wick lowering direction, within an appropriate range until the lamp contacts the protrusion 38 of the ratchet plate 32. 5, the locking pin 44 comes into contact with the other edge 40 of the toothless portion 39 of the adjustment plate 34. In this state, the operating shaft 16 cannot be rotated any further in the counterclockwise direction, that is, in the wick lowering direction, and therefore the wick 4 cannot be lowered beyond the lower limit position of the firepower adjustment range. It has become impossible to do so.

Note that in the state shown in FIG. 5, that is, in the state in which the lamp wick 4 has risen only to the lower limit of the firepower adjustment range, the lamp wick 4 is in the state shown in FIG.
The operating shaft 16 can be rotated clockwise until it reaches the upper limit position of the firepower adjustment range.

When extinguishing a fire by completely lowering the wick 4, when the lever 45 is moved in the opposite direction to the biased direction by operating a button for extinguishing (not shown), the locking pin 44 is Ratchet plate 3
The spring case 25 rapidly rotates counterclockwise due to the reversing force stored in the core lowering spring 26, and the protrusion 38 of the ratchet plate 32 pushes one edge 41 of the toothless portion 39 of the adjustment plate 34, rotates the operating shaft 16 counterclockwise, and the lamp wick 4 descends to the lowest position.

Note that even if a seismic sensor (not shown) is actuated while the lamp wick 4 is raised, the lever 45 is moved in the opposite direction to the biased direction, and the wick lowering spring 26 is activated in the same manner as described above. Thus, the lamp wick 4 descends to the lowest position.

This concludes the description of the embodiment, but the present invention is not limited to the embodiment described above. For example, in this embodiment, the adjustment plate 3
The edges 40 and 41 of the toothless portion 39 of No. 4 were used as a pair of engaging portions for the protrusion 38 of the ratchet plate 32, and the protrusion 38 was movably held between the edges 40 and 41. A pair of engaging portions that hold the portion 38 movably within a predetermined range may be provided separately from the toothless portion 39. Furthermore, the relationship between the protruding portion and the pair of engaging portions may be reversed, and the protruding portion may be attached to the adjustment plate. 34 and a pair of engaging portions may also be provided on the ratchet plate 32.

〔Effect of the invention〕

As described above, according to the present invention, an adjustment plate having a toothless portion provided in a predetermined range on the outer periphery is engaged with the ratchet plate so as to be rotatable within a predetermined range and is fixed to the operating shaft. The firepower adjustment range is set to the state where the locking body is engaged with the toothless part of the lamp, so even if the wick is not fully raised due to user error, it will always be within the appropriate range. The firepower is adjusted inside. Therefore, it is possible to reliably prevent carbon monoxide and odor caused by excessively weak combustion, as well as the risk of oil temperature rising due to temperature rise at the upper portions of the inner cylinder and outer cylinder.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a part of the kerosene stove, Fig. 2 is a front view of its ratchet plate, Fig. 3 is a front view of its adjustment plate, and Fig. 3 is a front view of its ratchet plate. 4 and 5 are respectively explanatory diagrams of the operation. 2... Inner tube, 3... Outer tube, 4... Light wick, 16...
...Operation shaft, 26... Core lowering spring, 31... Teeth, 3
2... Ratchet plate, 33... Teeth, 34... Adjustment plate, 38... Protrusion, 39... Missing tooth part, 40, 41
. . . Edge as an engaging portion, 44 . . . A locking pin as a locking body.

Claims (1)

[Scope of Claims] 1. A lamp wick provided between an inner tube and an outer tube for guiding the wick is moved up and down by the rotation of an operating shaft, and when the operating shaft is rotated in the direction in which the wick rises, a plurality of teeth are formed on the outer periphery. The teeth of this ratchet plate are sequentially locked with the locking body to store energy in the core lowering spring, and by removing the locking body from the teeth of the ratchet plate, the center lowering spring is released. In a wick up-and-down mechanism for a liquid fuel combustion device in which an operating shaft is rotated in a core lowering direction via a ratchet plate by the urging force of Similarly, an adjustment plate having a plurality of teeth on its outer periphery that is locked by the locking body is fixed to the operating shaft adjacent to the ratchet plate, and a protrusion is provided on either the ratchet plate or the adjustment plate. , a pair of engaging portions are provided on the other of the ratchet plate and the adjustment plate to hold the protrusion movably within a predetermined range, and a toothless portion that is not locked by the locking body is provided in a predetermined range on the outer periphery of the adjustment plate. and when the operating shaft rotates in the center upward direction, the protrusion engages with one of the pair of engaging parts to rotate the ratchet plate together with the adjustment plate in the direction of accumulating the center lowering spring. When in use, the rotation range of the operating shaft is restricted to a predetermined range in which the locking body engages with the toothless portion of the adjustment plate, and the firepower is adjusted within this range. Core up and down mechanism for fuel combustion equipment.