JPS6127647B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a wick up-and-down mechanism that uses a drive motor to rotate a rotating shaft to raise the wick, and uses a spring force stored when the wick is raised to reverse the rotating shaft and lower the wick. The present invention relates to liquid fuel combustion devices, and in particular to improvements in the structure of the wick rising portion thereof.

The present inventors have designed a liquid fuel combustion device, such as a kerosene stove, to raise the wick by rotating a rotating shaft with a drive motor, and to stop the drive motor when the wick has finished rising.
On the other hand, when lowering the wick, first remove the interlocking relationship between the drive motor and the rotating shaft, and then use the spring force stored when the wick is raised to reverse the rotating shaft. However, in this type of device, the interlocking mechanism for transmitting the rotational force from the drive motor to the rotating shaft and for canceling the rotational force is complicated, and therefore it is not easy to assemble.

The present invention was made in view of the above points, and includes a clutch cam fixed to a rotating shaft, a clutch mounting plate to which a clutch is attached and disengaged from the clutch cam to transmit rotational force, and a clutch mounting plate integrally attached to the clutch mounting plate. A first driven gear that is attached to the clutch cam, a second driven gear that has a guide edge that engages and disengages the clutch from the clutch cam, etc. are integrated into a unit to form an interlocking mechanism and facilitate assembly to the rotating shaft. This also makes it possible to check the operation before assembly, and by providing a guide edge around the entire circumference, the clutch can be reliably engaged and disengaged from the clutch cam to ensure that the wick can be moved up and down. This is the purpose.

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

1 is a fixed tank, and this fixed tank 1 is provided on a stand 2 and has a burner basket 3 on its upper part.
A cylindrical wick guide 4 is formed vertically inside the wick guide 4, and a cylindrical wick 5 is attached to the outer periphery of the wick guide 4 so as to be movable up and down. Fire pan part 3
It is starting to appear in a.

A wick holder 6 is attached to the lower outer periphery of the lamp wick 5.
are integrally engaged with each other, and a rack 7 is attached to the outer surface of the core holder 6 by spot welding or the like, and a pinion 9 provided at one end of a rotating shaft 8 is engaged with the rack 7. By rotating the rotating shaft 8, the lamp wick 5 is raised and lowered.

A clutch cam 1 is also provided at the other end of the rotating shaft 8.
1 is installed. This clutch cam 11 has a cam portion 12 formed on one side near the pinion 9, and a boss portion 13 on the other side.
This boss portion 13 is fixed to the rotating shaft 8 by a pin 14 .

A clutch mounting plate 15 is rotatably supported on the boss portion 13 of the clutch cam 11 adjacent to the cam portion 12. This clutch mounting plate 15
is formed in a cam shape, and a clutch 16 is attached to a support shaft 17 on one side of the cam part 12 side on the outer peripheral side of the large diameter part.
It is rotatably mounted.

Furthermore, a first driven gear 18 is rotatably supported on the boss portion 13 of the clutch cam 11. The first driven gear 18 is fixedly integrated with the clutch mounting plate 15 at its boss portion 19, and is provided with a gear portion 20 spaced apart from the clutch mounting plate 15.

The boss portion 19 of the first driven gear 18 is
A second driven gear 21 is rotatably supported between the gear portion 20 and the clutch mounting plate 15. This second driven gear 21 has a guide edge 2 for the clutch 16 over the entire circumference of one side on the clutch mounting plate 15 side on its outer circumferential side.
A pressing portion 23 and a releasing portion 24 for engaging and disengaging the clutch 16 from the clutch cam 11 are formed on the inner circumferential side of the guide edge 22, and a releasing portion 24 is formed on the outer circumferential side of the guide edge 22.
A clutch spring 25 in the form of a leaf spring is fixed to the clutch spring 25 by a rivet 26, and the tip of the clutch spring 25 is biased in a direction protruding inward from the guide edge 22 at one end of the pressing portion 23. Note that the guide edge 22 pressing portion 23
is provided with a recess 27, and the rivet 26 is located in this recess 27, so that the head of the rivet 26 is connected to the clutch mounting plate 15 and the clutch 16.
It is designed so that it does not hinder rotation.

Also, the pinion 9 of the interlocking mechanism 28 is composed of the clutch cam 11, the clutch mounting plate 15, the first driven gear 18, the second driven gear 21, etc.
At the side, return the spring 31 to the rotating shaft 8.
The ratchet plate 32, which has a built-in lamp, is fixed with screws 33, and the rotary shaft 8 is rotated clockwise in FIGS. The force is stored in the return spring 31 while being locked with the locking pin extended from the seismic device.After the force is stored in the return spring 31, the force stored in the return spring is released by removing the locking pin of the vibration sensor. The lamp wick 5 is instantly lowered to instantly extinguish the fire.

Further, 41 is a gear motor as a drive motor. This gear motor 41 and a gear case 42 integrated therewith are fixed to the fixed tank 1 via a mounting base 43, and the output of this gear motor 41 is transmitted to the gear in the gear case 42. via the output shaft 44
It is now being transmitted to

A first output gear 4 is connected to the output shaft 44.
5 and a second output gear 46 are fixed, and the first output gear 45 and the second output gear 46 are meshed with the first driven gear 18 and the second driven gear 21, respectively. The outer tip of the rotating shaft 8 is supported by a support 47 fixed to the gear case 42.
7, each output gear 45, 46 and each driven gear 1
8, 21, positional relationship and each driven gear 18, 21
Also, the positional relationship between the clutch mounting plate 15 and the clutch cam 11 is maintained.

In such a configuration, when the gear motor 41 is rotated by turning on the main switch (not shown), the output shaft 44 is rotated via the gear in the gear case 42, and the first and second output gears 45, which are coaxial with the output shaft 44, are rotated. 46 rotates, the first and second driven gears 18 and 21 that are meshed with these gears also begin to rotate.

Along with this, the first and second driven gears 1
The clutch mounting plate 15 and the guide edge 22, which are integral with the clutch mounting plates 15 and 8, 21, respectively, rotate in the same way, but at this point, the clutch 16 is located at the release part 24 of the guide edge 22, and the clutch 16 on the clutch mounting plate 15 and the guide edge 22 are rotated. Clutch cam 11 fixed to rotating shaft 8
The clutch mounting plate 15 and the guide edge 22 are not engaged with the cam portion 12 of the clutch, and therefore the clutch mounting plate 15 and the guide edge 22 are in a state of idle rotation with respect to the rotating shaft 8.

In this case, the first output gear 45 and the first driven gear 18 are meshed with each other at a ratio of 1:1, and the second output gear 46 and the second driven gear 21 are meshed with each other at a ratio of 1:1. Therefore, when the clutch 16 on the clutch mounting plate 15, which is integrated with the first driven gear 18, rotates twice, the guide edge 22, which is integrated with the second driven gear 22, has a gear ratio of 1. The clutch 16 will rotate, and the clutch 16 will rotate.
When the rotation is started and rotated by a predetermined angle, for example, approximately 0.5 rotations, the guide edge 22 is rotated as shown in FIG.
It rotates about the support shaft 17 as a fulcrum while being guided by the end of the pressing part 23 in the clutch cam 11, and is forcibly engaged with the cam part 12 of the clutch cam 11, thereby causing the rotation shaft 8 to rotate. As the lamp wick 5 is started, the pinion 9 of the rotating shaft 8 and the rack 7 of the wick holder 6 engage with each other.
starts to rise, and the tip of the clutch spring 25 is pushed outward by the cam-shaped clutch mounting plate 15, as shown in FIG.

Further, in this case, the number of rotations of the rotating shaft 8 from the time when the lamp wick 5 starts to rise until the lamp wick 5 completes its rise, the position is detected by a micro switch (not shown), and the gear motor 41 stops is as follows. Approximately depending on the relationship between the pinion 9 and the rack 7 of the core holder 6.
The rotation speed is set at a little over 1.5 rotations, so that the cam portion 1 of the clutch cam 11 is rotated in the state shown in FIG.
The clutch 16 engaged with the clutch 2 rotates twice from the moment the main switch is turned on. Therefore, due to the above-mentioned tooth number ratio relationship, the guide edge 2
2 rotates once at this point, so it will stop at the same point where the main switch was turned on.

Further, at a point slightly before stopping at this location, the clutch 16, which rotates faster than the guide edge 22 due to the above-mentioned tooth ratio, passes the tip of the clutch spring 25 at the guide edge 22, as shown in FIG. When the clutch spring 25 is located at the release portion 24 of the guide edge 22 and the tip of the clutch spring 25 passes the position of the support shaft 17 that is the fulcrum of the clutch 16, the tip of the clutch spring 25 is located at the cam-shaped clutch mounting plate 15. Moving from the large diameter part to the small diameter part, the rear end of the clutch 16 is pushed up, the engagement of the clutch 16 with the cam part 12 of the clutch cam 11 is released, and a micro switch etc. detects the highest point of rise of the lamp wick 5, and the gear motor 41 stops, the clutch 16 and the cam part 12 of the clutch cam 11 are separated, and even if the cam part 12 rotates independently, it does not come into contact with the clutch 16, and the engagement is completely released, and the clutch 16 is moved away from the guide edge. It will be located at the release part 24 at 22.

Therefore, from this point on, the ratchet plate 32
By releasing the locking pin of the seismic sensor that locks the claw of the wick, the force of the return spring 31 accumulated when the lamp wick 5 is raised causes the rotating shaft 8 and the clutch cam 11 integrated therewith to be reversed. wick 5
In this case, since the cam portion 12 of the clutch cam 11 is separated from the clutch 16, it reverses with zero frictional resistance with the clutch 16 and returns to the on-center starting point,
Due to the relationship of the tooth number ratio, the clutch 16 and the guide edge 22 are also located at the same location as the point at which the main switch is turned on, resulting in the same positional relationship as in the original state.

When assembling the interlocking mechanism 28 to the rotating shaft 8, the second driven gear 21 to which the clutch spring 25 is attached is pivotally supported on the boss portion 19 of the first driven gear 18, and the clutch 16 is attached to the boss portion 19. By fixing the clutch mounting plate 15 which is pivotally supported, the second driven gear 21 is connected to the gear portion 20 of the first driven gear 18.
The clutch cam 11 can be easily assembled by being integrated in a state where it is held between the clutch mounting plates 15, that is, in a sander clutch state, and pivotally supported on the boss portion 13 of the clutch cam 11 attached to the rotating shaft 8.
Clutch mounting plate 15 and first driven gear 1 are integrated in a sandwiched state for operation check before assembly.
8 and the second driven gear 21 are pivotally supported on the boss portion 13 of the clutch cam 11 before being attached to the rotating shaft 8, the interlocking mechanism 28 is made into a unit, and the operation of the interlocking mechanism 28 can be checked by itself.
It is possible to prevent malfunctions after assembly and stabilize quality.

According to the present invention, since the interlocking mechanism can be integrated into a unit, it is easy to assemble to the rotating shaft, and it is also easy to check the operation before assembling.
In addition, since the guide edge for the clutch is provided around the entire circumference, when the drive motor is started, the clutch engages with the clutch cam reliably and smoothly, and the wick rises smoothly. Since it is provided on one side of the first driven gear, the interlocking mechanism is also simple and the number of parts can be reduced.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway plan view of a liquid fuel combustion device, Fig. 2 is a partially cutaway front view, and Fig. 3 is a partially cutaway plan view of the liquid fuel combustion device. A cross-sectional view taken along the line A--A in FIG. 1, and FIGS. 4 to 6 are cross-sectional views of essential parts at the start of the wick rise, during the wick rise, and at the end of the wick rise, respectively. 5... Light wick, 8... Rotating shaft, 11... Clutch cam, 12... Cam part, 15... Clutch mounting plate, 16... Clutch, 18... First driven gear, 20... Gear part, 21 ...second driven gear,
22... Guide edge, 23... Pressing part, 24... Release part, 41... Gear motor as a drive motor.

Claims (1)

[Claims] 1. A drive motor that rotates a rotating shaft to raise the wick and then reverses the rotating shaft using a spring force stored when the wick is raised to lower the wick, which is fixed to the rotating shaft and has a cam part on one side. a clutch cam having a clutch cam, a clutch mounting plate rotatably supported on the clutch cam adjacent to the cam portion, and a clutch mounting plate rotatably supported on one side on the outer peripheral side of the clutch mounting plate, the outer periphery of the cam portion of the clutch cam. The clutch has a clutch that is engaged and disengaged from the side, and a gear portion that is rotatably supported by the clutch cam, is attached to the clutch mounting plate, and is spaced apart from the clutch mounting plate, and is driven by the drive motor. a first driven gear, a second driven gear rotatably supported by the first driven gear between the gear portion and the clutch mounting plate and driven by the drive motor; The second driven gear has a pressing part and a releasing part on the inner peripheral side, which are provided over the entire circumference of one side on the outer peripheral side of the second driven gear, and are located on the outer peripheral side of the clutch to engage and disengage the clutch from the cam part of the clutch cam. A liquid fuel combustion device characterized by comprising a guide edge.