JPH0222843B2 - - 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,
Some devices obtain the centering operation force from an electric motor, but in this case, the electric motor is a one-way type, so if you make it operate smoothly, you will be able to accurately position the centering lever on the centerline. There was a drawback that it could not be configured.

The purpose of the present invention is to adjust the position of the core operating lever on the core,
To provide a core lifting and lowering device that has a simple structure, can be set accurately, and can smoothly operate an electric motor.

<Means for Solving the Problems> The means for solving the problems according to the present invention includes an electric motor with a reversing function that is supplied with power when the core is raised, and a motor that is attached to the rotating shaft of the motor and rotates normally from a standby position to a position above the core when the motor rotates in the normal direction. Furthermore, a rotating member that rotates in reverse from an on-center position to a standby position when reversed, and a connecting plate connected to the rotating member so as to rotate in conjunction with the rotation of the rotating member.
A core operating lever rotates between a core above position and a core below position, and when the rotating member rotates normally from a standby position to a core above position, the core operating lever engages with a connecting plate and rotates from a core below position to a core above position. an engaging means that releases the engagement between the core operating lever and the connecting plate to allow the connecting plate to reverse rotation when the rotating member rotates on the core to a position on the core and reverses from the on-core position to the standby position; a lower core spring that urges downward; a holding means that holds the core operating lever at a position above the core against the biasing force of the lower core spring; a release device that releases the holding means; It is provided with a first stopper and a second stopper that set the rotation angle θ between the standby position and the on-center position to 180° or less.

<Operation> In the problem solving means described above, in order to bring the core to the above-core position when the core is in the below-core position and the power supply is connected, the electric motor is rotated in the normal direction, and the rotating member and the connecting plate are rotated. As the connecting plate rotates, the engaging means acts, and the connecting plate and the core operating lever rotate together.
The core rises.

When the core operating lever comes into contact with the first stopper, a mechanical load is applied to the electric motor, so the electric motor is reversed by its reversing function, and the rotating member and the connecting plate are reversed to the standby position. On the other hand, the core operating lever is held at the core position by the holding means.

By the way, when using a one-way electric motor, if the rotating member is on-center at a point other than its bottom dead center, it will be on-center before reaching the bottom dead center, and if you continue to supply power to the motor after that, it will be on-center. , a mechanical load is applied to the motor by a stopper etc. until it descends to the bottom dead center, making it impossible for the motor to operate smoothly.

Therefore, the rotary member must have its bottom dead center located above the center. However, when the bottom dead center of the rotating member is set at the on-center position, the on-center position of the connecting plate, that is, the core operating lever changes due to variations in mounting errors of the rotating member, stopper, etc.

In contrast, the present invention uses an electric motor with a reversing function to reduce the operating rotation angle to 180° or less.
By pushing down the connecting plate to the above-core position, and then reversing it to return to the original standby position after completing the setting, the above-core position of the core, that is, the position of the core operating lever by the first stopper, is reliably stabilized, and the motor operates smoothly. can.

<Example> Hereinafter, examples of the present invention will be described based on the drawings. Fig. 1 is a plan view, Fig. 2 is a front view in a state below the core, Fig. 3 is a front view with the front portion cut away,
FIG. 4 is a front view of the on-core state.

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, and a first pin 4 is fitted into the left and right elongated holes 3a of the metal fitting 3. The right end of the first arm 5, which supports the first arm 5 at its left end, is fixed to the inner end of the core lifting shaft 6.

The core lifting shaft 6 is rotatably supported by the tank 1 via a bearing 7. Further, 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 provided protruding from the right end of the second arm 8. That is, the downward rotation (clockwise rotation) of the second arm 8 about the core lifting shaft 6 causes the first arm 5 to rotate upward (clockwise rotation), and 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. Furthermore, the right part of the core operating lever 10 is formed to protrude upward, and a vertically long inverted L-shaped engagement hole 10b 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 a left part 15a that is bent from the right end of the left part 15a through the vertical hole 11a of the board 11, bent toward the back of the board 11 into an L-shape in a plan view, and protrudes to the right. It consists of a right part 15b.
A pawl 15c that removably engages the fourth pin 23 at the upper end of the engaging member 14 is formed at the upper right end of the left part 15a of the connecting plate 15, and left and right elongated holes 15d are formed in the right part 15b. Further, the second pin 9 is passed through the upper and lower elongated holes 15e of the left portion 15a and the elongated holes 11b of the substrate 11.

The core operating lever 10 is engaged with the connecting plate 15 from the pawl 15c of the connecting plate 15, the fourth pin 23, the engaging member 14, etc. when the rotating member 19 (described later) rotates forward from the standby position to the on-core position. A lock that rotates on the core from a position below the core to an above-core position, and releases the engagement between the core operating lever 10 and the connecting plate 15 when the rotating member 19 reverses from the above-core position to the standby position, allowing the connecting plate 15 to reverse rotation. A means of combining is configured.

Reference numeral 16 denotes an electric motor with a reversing function that reverses when a mechanical load above a certain level is applied during forward and reverse rotation (or can be switched between forward and reverse directions by switching an automatic switch), and is supported by the tank 1 by a bracket 17. The electric motor 1
The center side of a rotating member 19 is fixed to the rotating shaft 18 of No. 6, and a third pin 20 protruding from the tip side of the rotating member 19 is fitted into the elongated hole 15d of the connecting plate 15.

Therefore, when 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 operating piece 22 of the motor self-holding switch 21 consisting of 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 and the core operating lever are integrated with the connecting plate 15. 10 is rotated clockwise from the below-core position 10B in FIG. 2 to bring the core operating lever 10 to the above-core position 10A as shown in FIGS. 4 and 9.

At this time, the fifth pin 25 protruding from the first projecting piece 24a of the inverted Y-shaped locking member 24 engages with the engaging portion 10c of the engaging hole 10b of the core operating lever 10, so the core The operating lever 10 stops at the on-center 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. That is, the engaging portion 1 of the engaging hole 10b of the core operating lever 10
0c, the fifth pin 25 of the first projecting piece 24a of the locking member 24 and the tension spring 27 constitute a holding means for holding the core operating lever 10 at the above-core position against the biasing force of the under-core spring 12. Ru.

Furthermore, 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, a mechanical load is applied. The member 19 starts to reverse in the direction of arrow B. Therefore, the connecting plate 15 rotates upward (counterclockwise) via the third pin 20, and the upper edge 15g of the right part 15b
The second stopper 22 formed by the operating piece 22 of the self-holding switch 21 is brought into contact with the second stopper 22 to open the self-holding switch 21 and stop the electric motor 16.

That is, the connecting plate 15 connects the first and second stoppers 28, 22 and the core operating lever 10, as shown in FIG.
Therefore, the rotation angle between the standby position 15B and the on-center position 15A is regulated. Therefore, the rotating member 19, that is, the electric motor 16 that interlocks with the connecting plate 15
The rotation angle θ of the rotating shaft 18 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 is
Case 30 and solenoid L that is energized during power supply
(Fig. 7), a release member 31 made of an iron core that is attracted toward the case 30 by the excitation, and a ring 31a at the tip of the release member 31 that is interposed between the case 30 and the ring 31a at the tip of the release member 31 to project the release member 31 when the power supply is stopped. and a release spring 32.

When the release member 31 projects from the position shown in FIG. 4 to the position shown in FIG.
4b is pushed downward, and the fifth pin 25 on the first protruding piece 24a is slightly rotated clockwise to release the core operating lever 1.
The engagement hole 10b of No. 0 is disengaged from the engagement portion 10c. Therefore, the core operating lever 10 and the engaging member 14
is rotated counterclockwise by the force of the under-core spring 12 and moved to the under-core position 10B, and the core 2 is placed in the under-core position.

Next, the electric circuit will be explained using Figures 7 and 8.
The motor 16 is connected in series with a parallel connection body in which the start switch 33 for the motor 16 and the self-holding switch 21 for the motor circuit are connected in parallel, and the solenoid L for the release device 29 is connected in series.
and the switch 34 for the release device 29 are connected in series, and these two circuits are connected in parallel to each other.

Next, to explain the operation, in order to bring the wick 2 to the above-core position in the below-core position shown in FIGS. 1 to 3 and 7 and with the power connected, first close the switch 34 for the release device 29 ( (illustrated in phantom line). Then,
Since the solenoid L for the release device 29 is energized, the release member 31 is attracted into the case 30, and the locking member 24 and the engagement member 14 are slightly rotated counterclockwise by the action of the spring 27, and the fifth pin of each 2
5. The fourth pin 23 moves to the standby position at the imaginary line position.

Next, when the start switch 33 for the electric motor 16 is pressed and closed (as shown by the phantom line), the electric motor 16 starts in the normal rotation direction, and its rotating member 19, rotating shaft 18,
The third pin 20 rotates clockwise in the direction of arrow A.
Then, the connecting plate 15 connected to the third pin 20 of the rotating member 19 rotates clockwise around the main axis Y. This rotation of the connecting plate 15 causes the claw 15 to
c engages the fourth pin 23 of the engaging member 14, and thereafter the connecting plate 15 and the core operating lever 10 rotate clockwise in the direction of the arrow A as a unit.

This clockwise rotation of the core operating lever 10 is performed via the elongated hole 10a of the core operating lever 10 and the second pin 9.
The core 2 rises because it is transmitted to the elongated hole 3a of the metal fitting 3 via the second arm 8, the core lifting shaft 6, the first arm 5, and the first pin 4.

As shown in FIGS. 4 and 9, when the core operating lever 10 comes into contact with the first stopper 28, a mechanical load is applied to the electric motor 16, so its reversing function causes the rotating shaft 18 of the electric motor 16 and the rotating member 19 begins to reverse in the direction of arrow B. Therefore, the connecting plate 15 rotates upward (counterclockwise) via the third pin 20, and the upper edge 15g of the right part 15b is connected to the second stopper 22 formed by the actuating piece 22 of the self-holding switch 21. The electric motor 16 is stopped by contacting the electric motor 16 and opening the self-holding switch 21 (as shown by the phantom line in FIG. 8).

When the connecting plate 15 is rotated upward, the core operating lever 10
tries to rotate counterclockwise around the main shaft Y due to the biasing force of the sub-core spring 12, but since the locking member 24 is biased counterclockwise by the spring 27, the fifth pin 25 It engages with the engagement portion 10c of the engagement hole 10b of the operating lever 10, and the core operating lever 10 is stopped at this on-core position 10A, completing the on-core operation. Then, the wick 2 is ignited by the ignition device to use the liquid fuel combustor.

Note that while the core operating lever 10 is rotating clockwise, as shown in FIG. 8, when power is supplied to the electric motor 16 and its rotating shaft 18 rotates normally (clockwise) in the direction of the arrow A, the connecting plate 15 moves toward the main shaft Y. The upper edge 15g of the right side of the connecting plate 15 separates from the operating piece 22 of the self-holding switch 21 for the electric motor 16, which is a micro switch, and closes it. Even if the start switch 33 is released, the circuit of the motor 16 is self-maintained and the motor 16 can continue rotating.

Next, in order to switch the core 2 to the lower core position, turn the switch 34 for the release device 29 as shown by the solid line in FIG.
to open. Then, the solenoid L of the release device 29 is demagnetized, so the release member 31 is released from the spring 3.
Due to the elastic force of 2, it protrudes from the position shown in Fig. 4 to the position shown in Fig. 2. Then, the second projecting piece 24b of the locking member 24
is pushed downward, the fifth pin 25 on the first projecting piece 24a rotates slightly clockwise and disengages from 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 1
4 rotates counterclockwise by the force of the under-wick spring 12 and moves to the under-wick position 10B, and accordingly, the wick 2 moves to the under-wick position, and the wick 2 extinguishes the fire.

In this way, the wick can be extinguished by opening the release device switch 34, so when an anti-seismic automatic fire extinguishing device is installed, it can be configured by connecting a switch that opens only when a vibration is sensed in series with the solenoid L.

Next, with reference to FIG. 6, 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 centering operation. Now, as shown in FIG. 6, when the electric motor 16 rotates forward, the connecting plate 15 rotates clockwise, and the claw 1 of the connecting plate 15 rotates clockwise.
5c is the fourth pin 23 of the engaging member 14 shown in phantom line.
If a power outage occurs while the core control lever 10 is rotated approximately half clockwise, the solenoid L of the release device 29 will also be demagnetized, so the force of the spring 32 will release the second projecting piece of the locking member 24. 24b is pushed downward in the direction of arrow C, and the third projecting piece 24c rotates around the support shaft 26 in the direction of arrow D to the left, and the engagement member 14
Push the right edge 14a around the transmission shaft 13 in the direction of arrow D. Therefore, as shown by the solid line, the fourth pin 23 comes off the claw 15c of the connecting plate 15, so the engaging member 14
The core operating lever 10 is rotated counterclockwise in the direction of arrow B by the force of the lower core spring 12, and the core 2 is brought to the lower core position by the same action as when lowering the core.

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 its lower edge hits the first stopper 28.
Then, a mechanical load is applied to the electric motor 16,
Due to the reversing function, the rotating shaft 18 and rotating member 19 of the electric motor 16 begin to reverse in the direction of the arrow B.
Therefore, the connecting plate 15 rotates upward (counterclockwise) via the third pin 20, and the upper edge 15g of the right portion 15b is connected to the actuating piece 22 of the self-holding switch 21.
The electric motor 16 is stopped by opening the self-holding switch 21 by contacting the second stopper 22 formed by the second stopper 22 . At this time, since the upper edge 15h of the claw 15c of the connecting plate 15 is arc-shaped, the fourth pin 23 of the engaging member 14 when the connecting plate 15 rotates upward.
Avoids this and returns to the original standby position.

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, 22 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.

By the way, the unidirectional electric motor 1 shown in FIG. 5b
6 is used, the pin P of the rotating member 19 is brought into contact with the upper surface of the connecting plate 15, and the operating piece 22 of the self-holding switch 21 is closed and opened by the arcuate edge 19c of the rotating member 19. It can be configured as follows.

However, in the above case, if the rotating member 19 is set to the above-center position 19A at a position other than its bottom dead center, it will be at the above-center position before reaching the bottom dead center, and if the electric motor continues to be supplied with power thereafter, it will descend to the bottom dead center. Until stoppa 28
etc., which places a mechanical load on the motor, making it impossible for the motor to operate smoothly.

Therefore, the rotary member 19 must have its bottom dead center positioned above the center. However, rotating member 1
When the bottom dead center of 9 is set to the on-center position, the on-center position (set position) of the connecting plate 15, that is, the core operating lever, changes due to variations in installation errors of rotating members, stoppers, etc. (the on-center position of the core (also varies).

On the other hand, as shown in FIG. 5a, in the embodiment of the present invention, by using the electric motor 16 with a reversing function, the operating rotation angle θ is set to 180 degrees or less, and the connecting plate 15 is moved to the on-center position 15A (set position). By pushing down the lead 2 until the setting is completed, and then reversing it and returning it to the original standby position 15B, the lead 2 will be placed on the lead position (set position).
That is, the core operating lever 1 by the first stopper 28
The 0 position is definitely stable.

In addition, in FIG. 5b, if the electric motor 16 and the rotating member 19 are configured to be stopped at the above-center position (set position), the lock between the electric motor 16 and the connecting plate 15 is released when the set is released (when the core is lowered). Although a clutch mechanism or the like is required for this purpose, this is not necessary in the present invention.

Incidentally, it goes without saying that the first stopper and the second stopper can be arranged at other positions.

<Effects of the Invention> As is clear from the above description, the present invention provides an electric motor with a reversing function that is supplied with power when the core is raised, and a motor that is attached to the rotating shaft of the motor and rotates normally from a standby position to a position above the core when the motor rotates in the normal direction. In addition, a rotating member that reverses from the above-core position to a standby position when reversing, a connecting plate connected to the rotating member to rotate in conjunction with the rotation of the rotating member, and between the above-core position and the below-core position. When the rotating member rotates normally from the standby position to the on-core position, the core operating lever engages the connecting plate and rotates on the core from the on-core position to the on-core position, and the core of the rotating member is rotated from the on-core position to the on-core position. an engagement means that releases the engagement between the core operating lever and the connecting plate to allow the connecting plate to reverse when reversing from the upper position to the standby position; and a lower core spring that urges the core operating lever in the downward direction of the core. , a holding means for holding the core operating lever at the above-core position against the biasing force of the under-core spring, a release device for releasing the holding means, and a link between the standby position and the above-core position of the rotating member. It is equipped with a first stopper and a second stopper that set the rotation angle θ to 180° or less.

Therefore, according to the present invention, by using an electric motor with a reversing function, the operating rotation angle is set to 180 degrees or less, the connecting plate is pushed down to the above-center position, and after the setting is completed, it is reversed and returned to the original standby position. This has the excellent effect that the on-core position of the core, that is, the position of the core operating lever by the stopper, can be accurately set, and the motor can be operated smoothly.

[Brief explanation of drawings]

FIG. 1 is a plan view of the embodiment of the present invention in a state below the core;
Figure 2 is a front view, Figure 3 is a front view with a part of the front side cut away, Figure 4 is a front view with the core on top, and Figure 5a is a motor and connection plate for explaining the operation. Figure 5b is a front view of the motor and connecting plate in an example where a one-way motor is used as the motor, Figure 6 is a front view for explaining the operation during a power outage, and Figure 7 is the state below the core. Figure 8 is an electric circuit diagram when the motor is rotating, and the imaginary line shows the electric circuit when the motor is stopped in the on-center position. , FIG. 9 is a perspective view of the core lifting device in the position above the core. θ: Rotation angle, 10: Core operation lever, 10A: Above-center position, 10B: Below-core position, 12: Below-core spring, 14: Engagement member, 15: Connecting plate, 16:
Electric motor, 18: Rotating shaft, 19: Rotating member, 19
A: Position on the center, 19B: Also standby position, 2
2: Second stopper, 28: First stopper, 29:
Release device, 31: Release member.

Claims (1)

[Claims] 1. An electric motor with a reversing function that is supplied with power when the core rises,
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-core position when the motor rotates in the normal direction, and reversely rotates from the on-core position to the standby position when the motor rotates in the reverse direction; a connecting plate connected to the rotating member, a core operating lever that rotates between an on-core position and an on-core position, and a connecting plate that connects the core operating lever when the rotating member rotates normally from a standby position to an on-core position When the rotating member is reversed from the above-core position to the standby position, the engagement between the core operating lever and the connecting plate is released, allowing the connecting plate to rotate in reverse. an engaging means, an under-core spring that urges the core operating lever in a direction below the core, a holding means that holds the core operating lever at a position above the core against the biasing force of the under-core spring, and the holding means and a first stopper and a second stopper that set the rotation angle between the standby position and the on-core position of the rotating member to 180° or less. Core lifting device.