JPH0322534B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a wick lifting device for a liquid fuel combustor, such as a kerosene stove.

<Prior art and issues> Conventionally, in a wick lifting device for a liquid fuel combustor,
In addition to using an automatic open/return type switch on the core, the time from the start of power supply to the stop of power supply to the motor for the core was electrically set, so it was not possible to set this accurately. Further, there was a drawback that accurate movement on the core and accurate positioning of the position on the core could not be performed.

In the present invention, although the operation during core raising is a one-touch operation of closing the on-core switch, the time from the start of power supply to the motor until the power supply is stopped can be set extremely accurately, resulting in accurate operation and accurate positioning on the core. The purpose is to provide a core lifting device that allows for

<Means for solving the problem> The problem solving means described in claim 1 includes: an electric motor 16 with a reversing function that reverses when a mechanical load above a certain level is applied; and a rotating shaft of the electric motor 16. A rotating member 19 that is attached and rotates normally from the standby position to the on-center position when rotating normally, and reverses from the on-center position to the standby position when rotating in reverse.
and a core operating lever 10 whose core rotates from a below core position to an above core position in conjunction only with the normal rotation of the rotating member 19 from a standby position to an above core position; It consists of a locking means for locking, a stopper 28 that contacts the core operating lever 10 at a position above the core of the core operating lever 10 and applies a load above a certain level to the core operating lever 10, and a control electric circuit. The electric circuit includes an automatic open/return type on-core switch 33 that is closed when the core is on, and a first motor switch S1 and a second motor switch S2 that are connected in parallel to each other.
are connected in series to the electric motor 16, and the on-core switch 33 is connected to the on-core switch 3.
A self-holding switch 21 that closes when the switch 3 is closed is connected in parallel, and the first electric motor switch S1 is connected to the rotating member 19.
The second electric motor switch S2 is configured to be opened only when the core control lever 10 reaches the standby position, and the second electric motor switch S2 is configured to be opened only when the core operating lever 10 reaches the core above position. It is configured to reverse when a mechanical load is applied.

Further, the problem solving means described in claim 2 includes an electric motor 16, which is attached to a rotating shaft of the electric motor 16, and rotates in the normal direction from a standby position to an on-center position during normal rotation, and when reversed, Rotating member 19 that reverses from the center position to the standby position
and a core operating lever 10 that rotates on-center from a below-core position to an above-core position in conjunction only with the forward rotation of the rotating member 19 from a standby position to an above-core position; It consists of a locking means for locking at the core, and a control electric circuit, and the control electric circuit includes an automatic open/return type on-core switch 33 which is closed when the core is on, and a second switch connected in parallel with each other. One motor switch S1 and second motor switch S2
are connected in series to the electric motor 16 , and the on-core switch 33 is connected to the on-core switch 3 in series.
A self-holding switch 21 that closes when the rotation member 19 is closed is connected in parallel with the first electric motor switch S1.
The second motor switch S2 is configured to be opened only when the core operating lever 10 reaches the standby position, and the second motor switch S2 is configured to be opened only when the core operating lever 10 reaches the core position. It has a reversing function that allows switching between forward and reverse directions when the switch is opened.

<Function> In the problem solving means described in claim 1, when the on-core switch 33 is closed when the on-core switch 33 is on the core, the self-holding switch 2 connected in parallel with this is closed, and the core operating lever 10 is activated. Since the second motor switch S2, which is opened only when the on-center position is reached, is also closed, power supply to the motor 16 is started.

Therefore, power supply to the electric motor 16 can be started by one-touch operation of the on-core switch 33.

When power is supplied from the electric motor 16, the rotating member 19 attached to the rotating shaft rotates in the normal direction from the standby position to the above-core position, and in conjunction with this, the core operating lever 10
rotates on the core from the below-core position to the above-core position.

When the core operating lever 10 reaches the above-core position, it comes into contact with the stopper 28 and is subjected to a mechanical load above a certain level, so that the electric motor 16 is reversed. At this time, the core operating lever 10 is locked at the on-core position by the locking means, so that it maintains the on-core position.

Further, the second electric motor switch S2 is opened when the core operating lever 10 is at the core position, but since the self-holding switch 21 and the first electric motor switch S1 are closed, the rotating member 19 then reaches the standby position. Power continues to be supplied to the motor until

Then, when the rotating member 19 reaches the standby position,
The first motor switch S1 is opened. At this time, the core operation lever 10 is in the core position, and the second electric motor switch S2 is also opened, so that power supply to the electric motor 16 is stopped.

In this way, power is supplied to the electric motor 16 by the on-core switch 33, and the electric motor 16 is connected to the first and second electric motor switches S1 and S2, which are mechanically opened and closed by the rotating member 19 and the core operating lever 10. The time from the start of power supply to the power supply to the electric motor 16 until the power supply is stopped can be set extremely accurately, and accurate operation and accurate positioning on the core are possible.

In addition, in the problem solving means described in claim 2, if the electric motor 16 is provided with a reversing function capable of switching between forward and reverse directions when the second electric motor switch S2 is opened, the electric motor 16 can be moved in the above-center position of the core operating lever 10. The stopper 28 that comes into contact with the core operating lever 10 is no longer necessary, which makes it possible to reduce the number of parts, and, similarly to the above, the time from the start of power supply to the stop of power supply can be set extremely accurately, ensuring accurate operation and position on the core. Accurate positioning is possible.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

[First Embodiment] FIG. 1 is a plan view, and FIGS. 2 to 7 are diagrams showing each operating state of the core lifting device.

In the figure, 1 is a fuel tank, and 2 is a wick for sucking up the liquid fuel combustor in the tank. This core 2 is attached to a core metal fitting 3 that moves up and down along a guide tube 2a installed upright in the tank.A first pin 4 is fitted into the left and right elongated holes 3a of the metal fitting 3, and the first pin 4 is attached to the left end. The right end of the first arm 5 supported by the core lifting shaft 6
is fixed to the inner edge of the The core lifting shaft 6 is rotatably supported by the tank 1 via a bearing 7. The left end of a second arm 8 is fixed to the outer end of the core lifting shaft 6, and a second pin 9 is fixed to the right end of the second arm 8.
is installed protrudingly. In other words, the downward rotation (clockwise rotation) of the second arm 3 about the core lifting ring 6 causes the first arm 5 to rotate upward (clockwise rotation), so that the core 2 is in the above-center position, and conversely, the second arm As a result of the upward rotation (counterclockwise rotation) of 8, the first arm 5 rotates downward (counterclockwise rotation) and the core 2 is brought to the below-center position.

10 is a core control lever, and the left end of this is the board 11
It is rotatably supported by a main axis Y. Further, the second pin 9 protruding forward from the long hole of the base plate 11 is fitted into the left and right elongated holes 10a in the center of the core operating lever 10, thereby causing the core operating lever 10 and the second arm 8 to The vertical rotations are configured to coincide with each other.

Further, a tension-type under-core spring 1 is provided between the center portion of the core operating lever 10 and the upper left portion 11a of the base plate 11.
2 is stretched, and the core operating lever 10 is biased counterclockwise.

Further, the right part of the core operating lever 10 is formed to protrude upward, and an inverted L-shaped engagement hole 10b that is long vertically is formed in the right part.

Further, between the engagement hole 10b of the core operating lever 10 and the long hole 10a, an engagement member 14 that is vertically long and has an arc-shaped lower right edge 14a is rotatably connected by a transmission shaft 13. . Note that this engagement member 14
is urged counterclockwise around the transmission shaft 13 by its own weight, but this may be forced by a spring.

Further, a connecting plate 15 is interposed between the core operating lever 10 and the base plate 11, and the left end of the connecting plate 15 is rotatably supported by the base plate 11 about the main axis Y. The connecting plate 15 has a triangular left part 15a when viewed from the front, and is bent from the right end into an L-shape in a plan view through the vertical hole 11a of the board 11 to the back side of the board 11 and protrudes to the right side. and a right part 15b.
And, at the upper right end of the left part 15a of the connecting plate 15,
A pawl 15c is formed to releasably engage the fourth pin 23 at the upper end of the engaging member 14, and left and right long holes 15d are formed in the right part 15b, and the left part 15a
The second pin 9 passes through the upper and lower elongated holes 15e and the elongated hole 11b of the substrate 11.

Reference numeral 16 is a motor with a reversing function that reverses when a mechanical load above a certain level is applied during forward and reverse rotation (or forward and reverse switching is possible by automatic switch switching of the first motor switch S1 and the second motor switch S2),
It is supported by the tank 1 by a bracket 17. The center side of a rotating member 19 is fixed to the rotating shaft 18 of the electric motor 16, and a third pin 20 protruding from the tip side of the rotating member 19 is inserted into the elongated hole 15d of the connecting plate 15.
mated to.

Therefore, when electric power is supplied to the electric motor 16 and its rotating shaft 18 rotates normally (clockwise) in the direction of arrow A, the connecting plate 15 rotates downward (clockwise) around the main axis Y. Then, the right upper edge 15 of the connecting plate 15
g separates from the actuating piece R1 of the first motor switch S1, which is a microswitch, and closes it.
As the connecting plate 15 rotates downward, the claw 15c also engages with the fourth pin 23 at the imaginary line position on the upper part of the engaging member 14, so that the engaging member 14 is integrated with the connecting plate 15.
and the core operating lever 10 is at the lower core position 10B in FIG. 2a.
Then, rotate clockwise to bring the core operating lever 10 to the above-core position 10A as shown in FIG. 4a.

At this time, the fifth pin 25 protruding from the first projecting piece 24a of the inverted Y-shaped locking member 24 serving as the locking means is engaged with the engagement portion 10c of the engagement hole 10b of the core operating lever 10. As a result, the core operating lever 10 stops at the core position 10A.

Note that the center portion of the locking member 24 is rotatably supported by the base plate 11 by a support shaft 26. Further, the locking member 24 is urged counterclockwise by a tension spring 27.

Further, since the electric motor 16 has a reversing function, when the lower end of the core operating lever 10 comes into contact with the first stopper 28 protruding from the base plate 11, the operating piece R2 of the second electric motor switch S2 is pressed to open it. (FIG. 4b), since a mechanical load is applied, the rotating shaft 18 and rotating member 19 of the electric motor 16 start to reverse in the direction of arrow B, and the connecting plate 15 rotates upward via the third pin 20. (counterclockwise rotation), and the upper edge 15g of the right portion 15b comes into contact with the second stopper R1 formed by the operating piece R1 of the first motor switch S1, opening the first motor switch S1, and the motor 16 stop.

That is, as shown in FIG. 9a, the connecting plate 15 connects the first and second stoppers 28, R1 and the core operating lever 10.
Accordingly, the standby position 15B and the on-center position 15A
The rotation angle between the Therefore, the rotating member 19 that interlocks with the connecting plate 15, that is, the electric motor 1
The rotation angle θ of the rotation shaft 18 of No. 6 is set to 180° or less.

29 moves in one direction (upward) when power is supplied, and moves in the other direction (downward) when power supply is stopped, and locks the locking member 2.
This is a release device with a release member 31 for releasing the engagement state between the core control lever 10 and the core operation lever 10. This release device 29
includes a case 30, a solenoid L that is energized when power is supplied, a release member 31 made of an iron core that is attracted toward the case 30 by the excitation, and a ring 3 at the tip of the solenoid L to make the release member 31 protrude when power supply is stopped.
1a and a release spring 32 interposed between the case 30 and the case 30.

When the release member 31 protrudes from the position shown in FIG. 5a to the position shown in FIG. 6a, the second projecting piece 24b of the locking member 24
is pushed downward, so the fifth pin 25 on the first projecting piece 24a rotates slightly clockwise. Therefore,
Engagement portion 10c of engagement hole 10b of core operating lever 10
The core operating lever 10 and the engaging member 1 are disengaged from each other.
That is, in conjunction with the demagnetization of the solenoid L, the core 4 rotates counterclockwise by the force of the under-core spring 12 and moves to the under-core position 10B, and the core 2 becomes the under-core position.

Furthermore, the operating piece 22 of the motor circuit self-holding switch 21 is switched from the open state to the closed state by rotation of the second projecting piece 24b of the locking member 24 as a locking means in the direction of the arrow A.

Next, to explain the electric circuit with reference to FIGS. 2b to 6b, an automatic open/return type on-core switch 33 that is opened when the core is on and the self-holding switch 21 for the motor circuit are connected in parallel. a parallel connection body, an automatic close/return type under-core switch 34, a first motor switch S1 and a second motor switch S.
2 and the electric motor 16 are connected in series, and the solenoid L for the release device 29 is connected in parallel to the electric motor 16 and its switches S1 and S2. Note that D1 and D2 are rectifying diodes.

(Operation) Next, to explain the operation, in order to bring the core 2 to the upper core position when the core is at the lower core position in Figures 1 and 2 and the motor power supply is connected, first, as shown in the imaginary line in Figure 2b, , closes the on-core switch 33.

Then, the solenoid L for the release device 29 is energized, so the release member 31 is attracted into the case 30 as shown in FIG. The fifth pin 25 and the fourth pin 23 are rotated and moved to the standby position. In addition, self-holding switch 2
1 is closed by the second projecting piece 24b of the locking member 24.

Furthermore, since the second electric motor switch S2 is closed as shown in FIG. The third pin 20 rotates clockwise in the direction of the arrow A, the connecting plate 15 rotates clockwise around the main axis Y, and after the pawl 15c engages with the fourth pin 23 of the engaging member 14, the connecting plate 15 and It rotates clockwise in the direction of arrow A integrally with the core operating lever 10.

At this time, since the connecting plate 15 rotates clockwise around the main axis Y, it separates from the operating piece R1 of the first motor switch S1, and the motor 16 is in the state as shown in FIG. 3b.
Power is supplied to the

Note that while the core operating lever 10 is rotating clockwise, the self-holding switch 21 remains closed due to the rotation of the locking member 24, so even if the motor 16 core switch 33 is released, the motor 16 remains closed. The circuit is self-maintained, and the electric motor 16 can continue rotating.

Then, as shown in FIG. 4a, when the core operating lever 10 comes into contact with the first stopper 28, the fifth pin 25 engages the engaging portion 10c of the engaging hole 10b of the core operating lever 10.
, so the core operating lever 10 stops at this on-core position 10A. In addition, this core operation lever 1
0 clockwise rotation is the long hole 10 of the core operating lever 10.
a and the second pin 9, the second arm 8, the core lifting shaft 6, the first arm 5, and the metal fitting 3 via the first pin 4.
The core 2 rises to a position above the core.

At the same time as the lower end of the core operating lever 10 comes into contact with the first stopper 28, as shown in FIG. 4b, the operating piece R2 of the second motor switch S2 is pushed to open it. At this time, a mechanical load is applied to the electric motor 16, so that the rotating shaft 18 and rotating member 19 of the electric motor 16 with a reversing function begin to reverse in the direction of the arrow B. Therefore, the connecting plate 15 rotates upward (rotates counterclockwise) via the third pin 20.

And 15g of the upper edge of the right part 15b of the linking plate 15
However, as shown in FIG. 5a, when the first motor switch S1 comes into contact with the second stopper R1 formed by the operating piece R1 of the first motor switch S1, the first motor switch S1 also opens as shown in FIG. 5b, so that the motor 16 stops.
At this time, the switch S2 is in the open state as shown in FIG. 5b, so the on-center operation is completed. Then, the wick 2 is ignited by the ignition device to use the liquid fuel combustor.

Further, in order to switch the core 2 to the lower core position, the lower core switch 34 is opened as shown by the solid line in FIG. 6b. Then, the solenoid L of the release device 29 is demagnetized, and the release member 31 is projected as shown in FIG. 6a by the elastic force of the spring 32. Therefore, the second projecting piece 24b of the locking member 24 is released by the release member 31.
is pushed downward, and the fifth pin 2 on the first protruding piece 24a
5 rotates slightly clockwise to disengage the engagement portion 10c of the engagement hole 10b of the core operating lever 10.
Therefore, the core operating lever 10 and the engaging member 14 are operated in conjunction with the demagnetization of the solenoid L, so that the core spring 12
The wick 2 is rotated counterclockwise by the force of , and moved to the lower wick position 10b, the wick 2 is placed in the lower wick position, and the wick 2 is extinguished.

Therefore, an anti-seismic automatic fire extinguishing system can be constructed by connecting a switch in series with a solenoid, which opens only when a vibration is sensed.

(Operation during power outage) Next, with reference to FIG. 8, a case will be described in which the rotation of the electric motor 16 is stopped midway due to a power outage or the like during the core raising operation. Now, as shown in FIG. 8, when the electric motor 16 rotates in the normal direction, the connecting plate 15 rotates clockwise, and its pawl 15c engages with the fourth pin 23 of the engaging member 14 shown in phantom lines, and the core operating lever 10 is moved half way. Assume that it has been rotated clockwise. If a power outage occurs at this mid-rotation position, the solenoid L of the release device 29 is also demagnetized, so the force of the spring 32 pushes the second protrusion 24b of the locking member 24 downward in the direction of arrow C, and the third protrusion Piece 2
4c rotates around the support shaft 26 in the direction of arrow D to the left,
The right edge 14a of the engagement member 14 is placed around the transmission shaft 13
Push in the direction of the arrow. Therefore, as shown by the solid line, the fourth pin 23 is disengaged from the claw 15c of the connecting plate 15, and the engaging member 44 and the core operating lever 10 are rotated counterclockwise in the direction of arrow B by the force of the lower core spring 12, and the core is lowered. The core 2 is brought to the lower core position by the same action as when the core 2 is moved.

In addition, when the power is restored, the connecting plate 15 connects the motor 1.
6 rotates clockwise from the state before the power outage, and at the same time its lower edge hits the first stopper 28, the operating piece R2 of the second motor switch S2 is pushed to open it (see Figure 4b). ). At this time, when the connecting plate 15 comes into contact with the first stopper 28, a mechanical load is applied to the electric motor 16, and due to its reversing function, the electric motor 16 and the rotating shaft 1
8 and rotating member 19 begin to reverse in the direction of arrow B. Therefore, the connecting plate 15 rotates upward (counterclockwise) via the third pin 20, and the right portion 15b
The upper edge 15g of the motor 16 comes into contact with the second stopper R1 formed by the operating piece R1 of the first motor switch S1 to open the first motor switch 21, thereby stopping the motor 16.

In this way, even if the electric motor 16 becomes a load for the core lowering operation during a power outage, the core 2 remains in the core lower position.

In addition, since the electric motor 16 with a reversing function is used as the operating force for the centering operation of the core operating lever 10, and the first and second stoppers 28, R1 are used, the electric motor 16 and the rotating member 1 as shown in FIG.
The rotation angle θ between the standby position 19B and the on-center position 19A of 9 can be suppressed to 180° or less.

[Second Embodiment] FIG. 10 shows a second embodiment of the present invention, in which the self-holding switch 21 is constituted by a normally open contact of a relay RY.

Incidentally, the rotating member 19 and the core operating lever 10 are not limited to those in the embodiment, but include those having similar functions. Of course, the first and second motor switches can also be placed in other positions.

[Comparison with another proposed example] The present invention was also compared with a proposed example in which a delay circuit T consisting of a thermistor having a timer function as shown in FIG. 11 was provided instead of the first and second motor switches. In this example, there is a drawback that the core operating lever, the position on the core of the rotating member, and the standby position are not stable due to variations in the delay time, but the present invention does not have this drawback.

<Effects of the Invention> As is clear from the above explanation, according to the present invention, the on-core switch is of the automatic open/return type, so the operation when raising the core is an operation of closing the on-core switch, that is, a one-touch operation. All you need to do is operate.
In addition, since the first and second motor switches, which are mechanically opened and closed by a rotating member and a core control lever, are connected to the motor, the time from the start of power supply to the power supply to the motor can be set extremely accurately, resulting in accurate operation. This enables accurate positioning on the core.

Additionally, if the electric motor has a reversal function that allows it to switch between forward and reverse directions when the second motor switch is opened, there will be no need for a stopper that comes into contact with the core operating lever at the position above the core, and the number of parts can be reduced. In addition, similarly to the above, the time from the start of power supply to the stop of power supply can be set extremely accurately, allowing accurate operation and accurate positioning on the core.

[Brief explanation of drawings]

FIG. 1 is a plan view of the embodiment of the present invention in a state below the core;
Fig. 2a is a front view of the same, Fig. 2b is an electric circuit diagram of the same, Fig. 3a is a front view showing a state in the middle of core raising, Fig. 3b is an electric circuit diagram of the same,
Figure 4a is a front view showing the connecting plate in the on-core position, Figure 4b is the electrical circuit diagram, and Figure 5a is the same in the on-core state with the connecting plate in the standby position. FIG. 5b is a front view showing a certain state, FIG. 5b is the same electric circuit diagram, FIG. 6a is a front view showing the under-core state, FIG. 6b is the same electric circuit diagram, and FIG. 7 is the under-core state FIG. 8 is a front view for explaining the operation during a power outage, FIG. FIG. 11 is an electrical circuit diagram of a proposed example. 10: Core operation lever, 10A: Its position on the core,
10B: Lower core position, 12: Lower core spring, 1
4: Engagement member, 15: Connection plate, 16: Electric motor, 1
8: Rotating shaft, 19: Rotating member, 19A: On-center position, 19B: Also standby position, 21: Self-holding switch, 22: Second stopper, R1: First stopper, 29: Release device, 31: Release member , 33:
Core switch.

Claims (1)

[Scope of Claims] 1. An electric motor with a reversing function that reverses when a mechanical load of a certain level or more is applied; a rotating member that rotates in reverse from an upper position to a standby position; a core operating lever that rotates on the core from a below-core position to an above-core position in conjunction with only the forward rotation of the rotating member from the standby position to an above-core position; A locking means for locking the operating lever at a position above the core; a stopper that contacts the core operating lever at the above-core position of the core operating lever to apply a load above a certain level to the core operating lever; and a control electric circuit. The control electric circuit includes: an automatic open/return type on-core switch that is closed when the core is on; a first motor switch and a second motor switch connected in parallel with each other; A self-holding switch that closes when the on-core switch is closed is connected in parallel to the on-core switch, and the first motor switch is opened only when the rotating member reaches a standby position. Further, the second electric motor switch is configured to be opened only when the core operating lever reaches a position above the core, and the electric motor is configured to reverse when a mechanical load of a certain level or more is applied by the stopper. A wick lifting device for a liquid fuel combustor, characterized by: 2. An electric motor, a rotating member that is attached to the rotating shaft of the motor and rotates in the normal direction from a standby position to an on-center position when the motor rotates in the normal direction, and reverses from the on-center position to the standby position when the rotating member rotates in the reverse direction; A core operating lever that rotates on the core from a below core position to an above core position in conjunction only with forward rotation to the above core position, a locking means that locks the core operating lever at the above core position, and control electricity. The control electric circuit is composed of an automatic open/return type on-core switch that is closed when the core is on, and a first motor switch and a second motor switch connected in parallel to each other, which are connected to the motor. A self-holding switch is connected in series to the on-core switch and is connected in parallel to the on-core switch, and the self-holding switch is closed when the on-core switch is closed, and the first motor switch is opened only when the rotating member reaches a standby position. Further, the second electric motor switch is configured to be opened only when the core operating lever reaches a position above the core, and the electric motor has a reversing function capable of switching between forward and reverse directions when the second electric motor switch is opened. A wick lifting device for a liquid fuel combustor, characterized by: