JPS649522B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a liquid fuel combustion device, and in particular,
A drive motor rotates the rotating shaft for raising and lowering the wick to raise the wick, and along with this, force is stored in a wick lowering spring, and the stored force in the wick lowering spring reversely rotates the rotating shaft to lower the wick. Regarding.

[Technical background of the invention]

Conventionally, this type of liquid fuel combustion device was developed by
The one described in Publication No. 57-49712 is known, but this one has a rotating shaft for raising and lowering the wick,
A clutch disk that fixes the clutch cam and is equipped with a clutch that engages and disengages from the clutch cam, and a clutch cover that is equipped with a clutch spring that engages and disengages the clutch of this clutch disk from the clutch cam are rotatably supported. By rotating the plate and clutch cover at a predetermined rotation ratio (for example, 2:1) by a drive motor,
After the wick has been raised, the clutch spring in the clutch cover operates the clutch in the clutch disc to release the clutch from the clutch cam.

[Problems with background technology]

In the conventional device described above, in order to operate the clutch of the clutch disk by the clutch spring of the clutch cover after the lamp wick has been raised, it is necessary to accurately align the clutch disk and the clutch cover in the rotating direction at the time of assembly. This is necessary, and if this is not done, the wick will not rise or fall completely, making it impossible to ignite or extinguish the lamp, or excessive force will be applied to the wick lowering spring. In addition, since the clutch disk and clutch cover must be rotated at different speeds, the power transmission mechanism from the drive motor becomes two systems, making the structure complicated and the assembly work difficult. It was more complicated, and the price was also higher because there were a lot of parts.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and it is possible to simplify the structure and eliminate the need for troublesome positioning in a liquid fuel combustion device in which the wick is raised and lowered by a drive motor and a wick lowering spring. The aim is to make assembly easier and lower product prices.

[Summary of the invention]

The present invention provides a liquid fuel combustion device in which a drive motor rotates a rotating shaft to raise the wick and stores power in a wick lowering spring, and the stored power of the wick lowering spring reversely rotates the rotating shaft to lower the wick. , a transmission disk rotatably supported on the rotation shaft and rotated by the drive motor; a rocking body pivotally supported on one side of the transmission disk; and a swinging body provided integrally with the rotation shaft. an engaging body that engages with the rocking body when one of the rocking bodies swings; a guide part that is provided on one side of the outer periphery of the transmission disk that swings the rocking body in one direction; and a release part that releases the rocking body. a disengagement body located at the rear end of the guide portion of the cam and biased against the outer circumferential surface of the transmission disk and the outer surface of the rocking body; A recess provided on the outer circumferential surface to allow movement of the disengagement body with respect to the rocking body so that the other rocking body can swing,
Since the cam and the disengagement body are fixed and only the transmission disk is rotated, there is no need for alignment, and the power transmission mechanism from the drive motor is only connected to the transmission disk, so the structure can be simplified. It is something.

[Embodiments of the invention]

Next, the liquid fuel combustion apparatus of the present invention will be specifically explained based on an embodiment shown in the drawings.

Figure 1 shows a part of the liquid fuel combustion device, 1
is a fuel tank fixed on a base 2. An inner cylinder 3 for guiding the core is formed upward from the center bottom of the tank 1, and an inner cylinder 3 for guiding the core is formed on the outside upper part of the tank 1. A burner basket 5 having an outer cylinder 4 for guiding the core inside is fitted,
A cylindrical lamp wick 6 is fitted between the inner cylinder 3 and the outer cylinder 4 so as to be able to move up and down.
It has become more common to appear.

A wick holder 8 is integrally fitted to the outer periphery of the lower part of the lamp wick 6, and a vertical or inclined rack 9 is attached to the outside of the wick holder 8. A gear 11 provided at one inner end of the shaft 10 is meshed with the gear 11.
When the rotating shaft 10 is rotated, the wick 6 is moved up and down via the wick holder 8 due to the meshing of the gear 11 and the rack 9.

The rotating shaft 10 is inserted into the tank 1 from the outside through a nut body 12 attached to the outside of the tank 1, and a collar 13 and a packing 14 are fitted between the nut body 12 and the rotating shaft 10. After fitting, a hollow bolt body 15 is screwed into the nut body 12, so that it is rotatably supported by the tank 1. The collar 13 not only positions the rotary shaft 10 in the axial direction, but also positions the rotary shaft 10 in the radial direction by coming into contact with a guide 16 attached to the lead holder 8 facing the rack 9. As a result, the engagement between the gear 11 and the rack 9 is maintained.

Further, an engaging body 20 is attached to the rotating shaft 10 with a screw 2.
It is fixed by 1. This engaging body 20 is
A cylindrical spring case portion 22, a large-diameter disk-like ratchet disk portion 23, an engaging portion 24, and a small-diameter boss portion 2.
5 is provided integrally with the spring case portion 2.
2, one end is connected to the tank 1 via the spring holding fitting 26.
A coil-shaped core lowering spring 27 is installed inside, and the other end is fixed to the spring case part 22, and at least one locking recess (not shown) is formed in the outer periphery of the ratchet disc part 23. At the same time, a stopper 28 is pressed against the engaging portion 24, and an engaging convex portion 24a is formed on the outer periphery of the engaging portion 24, as shown in FIGS. 2 to 4. The stopper 28 is connected to the ratchet disc portion 23 by a vibration sensor, manual extinguishing button, etc. (not shown).
Normally, it is in pressure contact with the ratchet disc part 23 and is in a state where it can be engaged with its locking recess, and when engaged, the ratchet disc part 23 rotates in the direction of lowering the lamp wick 6. It is designed to prevent only

Further, a power transmission body 30 is rotatably supported on the rotating shaft 10. The transmission body 30 is integrally provided with a transmission disk portion 31, a driven gear portion 32, and a boss portion 33, and is pivotally supported on the rotating shaft 10 via the boss portion 25 of the engagement body 20. As shown in FIGS. 2 to 4, an engaging convex portion of the engaging portion 24 is provided on the inner side surface of the transmission disc portion 31, and is located on the outer periphery of the engaging portion 24 of the engaging body 20. A rocking body 34 having a meshing part 34a on the inner peripheral side of one end that engages and disengages with the shaft 24a is swingably supported via a shaft 35.
A recess 31a is formed on the outer periphery of the transmission disc portion 31 at a position relative to the other end of the oscillating body 34.
is formed. The transmission body 30 has its outer periphery surrounded by a gear case 36 fixed to the tank 1 via a frame of a drive motor (not shown), and its front surface is surrounded by a switch mounting plate 37 attached to the gear case 36. Further, it is sandwiched between the switch mounting plate 37 and the outer end surface of the engaging portion 24 of the engaging body 20 for axial positioning.

An edge portion 40 serving as a substantially annular cam is formed on the inner side surface of the gear case 36 so as to be positioned on the inner side of the outer periphery of the transmission disk portion 31 of the transmission body 30 . As shown in FIGS. 2 to 4, this edge 40 includes a guide portion 40a that abuts one end of the rocking body 34 and rotates the rocking body 34 clockwise about the shaft 35, and a rocking body 34, and a release part 40b that releases the guide part 40a and allows it to swing freely, and an opening is provided without an edge 40 between the rear end of the guide part 40a and the release part 40b, that is, the upper part in the clockwise direction. A portion 41 is formed.

Further, a leaf spring 42 as a disengagement member is fixed to the upper inner surface of the gear case 36, and the tip of the leaf spring 42 is inserted through the opening 41 into the transmission disk portion 31 of the transmission body 30. It is biased against the outer peripheral surface and the outer surface of the rocking body 34.

Further, as shown in FIGS. 2 to 4, a drive gear 43 driven by a drive motor is meshed with the driven gear portion 32 of the transmission body 30.

Further, as shown in FIG. 5, a pin 51 is installed on the rotating shaft 10 at a position outside the switch mounting plate 37, and a switch cam 52 is rotatably supported. This switch cam 52 is pressed by a leaf spring 53 attached to the switch mounting plate 37 to provide rotational resistance, and a lock spring 54 attached to the inside thereof engages with and disengages from the pin 51. There is.

Also, a recess 5 is provided on the outer periphery of the switch cam 52.
2a and a convex piece 52b are provided, and the concave part 52a
A micro switch 55 operated by the switch mounting plate 37 is attached to the lower outer surface of the switch mounting plate 37, and a stopper 5 for locking the convex piece 52b is attached.
6 is provided on one side of the outer surface of the switch mounting plate 37. Note that the stopper 56 is connected to the convex piece 52.
It is made of rubber or the like to reduce the sound of contact with b.

Further, the outer end of the rotating shaft 10 projects outward from the main body case 57, and a forced core lowering knob 58 is fitted to the tip thereof.

Note that FIGS. 1, 2, and 5 show a state in which the lamp wick 6 is lowered.

Next, the operation will be explained.

When the drive motor is driven by closing an operation switch (not shown), the drive gear 43 rotates counterclockwise from the state shown in FIG.
The transmission body 30 including the driven gear portion 32 that meshes with the transmission body 30 is rotated clockwise in the drawing.

At the same time, the oscillating body 34 pivotally supported by the transmission disc portion 31 of the transmission body 30 is also rotated, and the edge 4
0 from the position relative to the release part 40b of the guide part 40
The engaging convex portion 24 moves to a position relative to a and swings clockwise around the shaft 35, and the engaging portion 34a on the inner peripheral side of one end thereof is provided on the engaging portion 24 of the engaging body 20.
It becomes possible to engage with a.

Then, when the transmission body 30 slightly rotates approximately 0.5 rotation from the start of driving, the engaging portion 34a of the rocking body 34 engages with the engaging convex portion 24a of the engaging body 20, and the engaging body 20 begins to rotate. The rotating shaft 10 rotates, a reversing force is stored in the wick lowering spring 27, and the wick 6 starts to rise due to the engagement between the gear 11 of the rotating shaft 10 and the rack 9 of the wick holder 8.

Then, when the transmission body 30 rotates approximately one rotation from the start of driving, as shown in FIG.
2, but the rocking body 3
The meshing portion 34a of No. 4 and the meshing convex portion 24a of the engaging body 20
are in meshing relationship (in this embodiment, the oscillator 3
4 is an acute angle between the center of swing and the engaging surface), the engaging portion 3 is moved by the reversing force of the core lowering spring 27
4a and the engaging convex portion 24a are pressed against each other, the rocking body 34 will not be rocked counterclockwise about the shaft 35 by the plate spring 42, and therefore,
The engaging body 20 continues to rotate together with the transmission body 30.

Then, when the transmission body 30 rotates one more rotation, that is, approximately two rotations from the start of driving, the rotating shaft 10 approximately rotates.
The lamp wick 6 rotates by a strong 1.5 rotations and rises above the fire pan 7, and as shown in FIG. It is in a state where it has moved to a position relative to the tip, but here as well, the rocking body 34 is moved in the same way as above.
Due to the meshing of the meshing portion 34a and the meshing convex portion 24a of the engaging body 20, the swinging body 34 passes through without being rocked counterclockwise by the plate spring 42.

Then, the transmission body 30 rotates slightly more than two revolutions from the start of driving, that is, from the state shown in FIG. 3, slightly clockwise. That is, in this state, the gear 11 provided at one end of the rotating shaft 10 of the lamp wick 6 can be easily rotated.
Since the lamp wick 6 has reached the terminal end, its rise is restricted and the rise is completed, but the drive motor remains in a conductive state due to a timer circuit etc. even after the lamp wick 6 completes its rise, and during this time there is a temporary lock state. When the drive is stopped, the reaction force accumulated when the drive motor is turned on, mainly due to the reversing force of the core lowering spring 27, is released at the engaging portion of each member. As a result, the engaging body 20 starts rotating in the opposite direction, and its engaging convex portion 24a
The transmission body 30 also starts to rotate in the opposite direction due to the engagement of the engaging portion 34a of the rocking body 34. Then, when the engaging body 20 rotates slightly in the opposite direction, a locking recess (not shown) of the ratchet disc portion 23 engages the stopper 28.
, the rotating shaft 10 is fixed in that state, the lamp wick 6 is held in the raised state, and the engaging body 20 is fixed by the stopper 28, so that the engaging protrusion 24a of the engaging body 20 and The pressure contact of the engaging portion 34a of the rocking body 34 is released, and in this state, the fourth
As shown in the figure, the tip of the leaf spring 42 is located in the recess 31a of the transmission disc portion 31 and pushes the other end of the oscillating body 34, causing the oscillating body 34 to swing counterclockwise. The meshing portion 34a separates from the meshing convex portion 24a, whereby the transmission body 20 and the engagement body 30 become unrelated.

In this state, the lamp wick 6 is lit and used.

In addition, in this state, the stopper 28 is connected to the engaging body 20 using a vibration sensor, manual extinguishing button, etc. (not shown).
When the engaging body 20 and the rotating shaft 10 are pulled away from the ratchet disk portion 23, the engaging body 20 and the rotating shaft 10 rapidly rotate approximately two rotations counterclockwise from the state shown in FIG. The lamp wick 6 descends and returns to the state shown in FIG. 2 again.

In addition to the above-mentioned operation, in this embodiment, a lock spring 54 is provided on the switch cam 52, so that when operation is started by closing the operation switch, the micro switch 55 is immediately activated.
is activated, and an operation indicator lamp (not shown) is lit. That is, when the lamp wick 6 is in the lowered state, as shown in FIGS. 1 and 5, the lock spring 54 and the pin 51 installed in the rotating shaft 10 are in the engaged state, By closing the operation switch from the state, the rotation axis 1
0 rotates, the switch cam 52 immediately rotates, and when its concave portion 52a passes the micro switch 55, the micro switch 55 is activated by the stepped portion 52c at the rear end of the concave portion 52a, and an operation indicator lamp (not shown) lights up. It is becoming more and more
Then, the convex piece 52 of the switch 52 rotates further.
When the pin 51 is engaged with the stopper 56, the pin 51 is removed from the lock spring 54. The pin 51 and the lock spring 54 engage again when the rotating shaft 10 rotates in the opposite direction and the lamp wick 6 descends.

In addition, in this embodiment, the switch cam 52 rotates in the opposite direction when the lamp wick 6 is lowered, and its convex piece 52b abuts against the stopper 56 when the lowering is completed.
Since the lamp 6 is made of rubber or the like, the sound of the lamp wick 6 falling is reduced.

Furthermore, in this embodiment, since a forced wick lowering knob 58 is provided on the rotating shaft 10, if tar or the like adheres to the wick 6 and the wick 6 cannot be completely lowered only by the stored force of the wick lowering spring 27, the forced wick lowering knob 58 can be used. 58 can be operated to completely lower the lamp wick 6.

Furthermore, in this embodiment, the engaging portion 3 of the oscillator 34
4a and the engaging convex portion 24a of the engaging body 20 are in a meshing relationship, and when they are pressed together, the leaf spring 42 is disabled, and when the lamp wick 6 completes rising, the driving force of the drive motor is cut off and the engaging body 20 is moved to its ratchet disk portion. 23 and the stopper 28, thereby releasing the pressure contact between the engaging portion 34a and the engaging convex portion 24a and allowing the plate spring 42 to act. The rotation speed can be set freely. In addition, when the number of rotations of the rotating shaft 10 during raising and lowering of the lamp wick 6 is set to one revolution or less, the meshing relationship as described above is not particularly required, and a simple engagement may be sufficient.

〔Effect of the invention〕

As described above, according to the present invention, the cam and the disengagement body are fixed and only the transmission disk is rotated, so there is no need for troublesome positioning and the lamp wick does not rise or fall incompletely. There is no need to worry about the ignition or extinguishing being impossible or excessive force being applied to the core lowering spring.Furthermore, there is only one power transmission system from the drive motor, so there are fewer parts and manufacturing is easy. , it can be done at low cost and serviceability such as repair can be improved.

[Brief explanation of drawings]

The figures show one embodiment of the liquid fuel combustion device of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the main parts thereof, and Figs. 2 to 4 are cross-sectional views taken along line A-A in Fig. 1, respectively, in different states. , and FIG. 5 is B in FIG.
-B is a sectional view. 6... Lamp wick, 10... Rotating shaft, 20... Engaging body, 27... Core lowering spring, 30... Transmission disk portion 3
1, 31a...concavity, 34...oscillating body pivotally supported by the transmission disc portion 31, 40...edge as a cam, 40a...guide portion, 40b...
Release portion, 42... A leaf spring serving as an engagement release body.

Claims (1)

[Scope of Claims] 1. A drive motor that rotates a rotating shaft to raise the wick and stores force in a wick lowering spring, and uses the accumulated force of the wick lowering spring to reversely rotate the rotating shaft and lower the wick. A transmission disk rotatably supported on the rotation shaft and rotated by the drive motor, a rocking body pivotally supported on one side of the transmission disk, and an oscillator integrally provided on the rotation shaft. an engaging body that engages with the rocking body when one of the rocking bodies swings; a guide part that is provided on one side of the outer periphery of the transmission disk that swings the rocking body in one direction; and a release part that releases the rocking body. a cam having a
a disengagement body located at the rear end of the guide portion of the cam and biased against the outer circumferential surface of the transmission disk and the outer surface of the rocking body; A liquid fuel combustion device comprising: a recess that allows the disengagement body to move relative to the rocking body and allows the other rocking body to swing.