JP5595370B2 - Thermal power control device - Google Patents

Description

  The present invention relates to a thermal power control apparatus that is mainly built in a gas stove and operates a swingable operation lever to adjust a gas supply amount supplied to a gas burner of the gas stove.

  As a conventional thermal power control device of this type, an operating lever is provided so as to be able to swing, and the free end of the operating lever is swung in the left-right direction to increase or decrease the amount of gas supplied to the gas burner. What adjusted is known (for example, refer patent document 1).

  On the other hand, an opening is provided in the peripheral surface of a part called a truncated cone-shaped closing member, an opening is also provided in a peripheral wall of a portion for storing the closing member, and the closing member is rotated by rotating an operation knob. A thermal power control apparatus is known in which a gas is allowed to flow through a portion where the opening on the closing side and the opening of the storage portion coincide with each other (see, for example, Patent Document 2).

JP-A-63-58018 (5th page, FIG. 1, FIG. 4) Japanese Patent Laid-Open No. 9-159053 (FIG. 1)

  In the above-described Patent Document 1, a thermal power control valve for adjusting the flow rate of gas includes a valve body fixed to a valve shaft, and this valve shaft is interlocked with a swing angle of an operation lever. Is configured to reciprocate in the axial direction. When the valve shaft reciprocates, the valve body fixed to the valve shaft also reciprocates, so the distance from the valve port where the valve body sits and closes changes, and the gas flowing through the valve port due to the change in the distance The flow rate increases or decreases.

  Instead of such a thermal power control valve in which the valve element reciprocates, it is conceivable to use a thermal power control mechanism using a closing element as described in Patent Document 2. However, since the rotation angle of the closing lever is larger than the rotation angle of the operating lever, the rotation angle of the closing member is insufficient if the swinging shaft of the swinging operation lever is made to coincide with the rotation axis of the closing lever. The firepower cannot be adjusted.

  Accordingly, the closing lever is rotated in conjunction with the swinging of the operation lever, and the swinging operation lever and the closing member are connected to each other via a connecting mechanism that increases the rotation angle of the closing lever with respect to the swinging angle of the operation lever. Need to be connected.

  Referring to FIG. 5, as such a coupling mechanism, as shown in FIG. 5A, an operating lever L is provided so as to be swingable about a swing center LC, and a long hole W formed in the control lever L is provided. In addition, a configuration is conceivable in which the pin P offset from the rotating shaft C of the closing member is inserted, and the rotating shaft C is rotated via the pin P by swinging the operation lever L to the left and right.

  However, in such a configuration, the direction F of the rotational force applied to the pin P due to the swing of the operation lever L and the direction M in which the pin F tries to move do not match in most states. This is because the swing center LC of the swing operation lever L and the rotation axis C of the pin P do not match. Thus, if the direction F of the rotational force does not coincide with the moving direction M, the force in the swinging direction with respect to the swinging operation lever L is not efficiently transmitted to the pin P as a rotational force. There arises a problem that the operational feeling does not match depending on the operational angle and that the operational feeling becomes heavy at both ends of the swing range.

  Further, as shown in FIG. 5B, when the operating lever L is swung, the relative position of the pin P in the elongated hole W moves, so that a frictional force is generated between the pin P and the inner wall of the elongated hole W. Occurs, and the operational feeling of the control lever L becomes heavier.

  Accordingly, in view of the above problems, the present invention provides a thermal power control device that has a constant feeling of operation and can efficiently transmit rotational force from the operating lever to the closing member when the closing lever is rotated by the operating lever. The issue is to provide.

Combustion control system according to the present invention in order to solve the above problems, it comprises an operating lever tip is extended to the front, and a閉子to increase or decrease the flow rate of the gas by the rotation angle, this閉子the pivot axis The lock pin can be moved forward and backward, and the tip of the operation lever is pushed down in the fully closed position to push down the lock pin on the lower surface of the operation lever to release the locked state with respect to the operation lever. The gas burner is configured to ignite when it is swung in the direction and beyond the fully open position to the ignition position. When the operating lever is swung in the left-right direction, the closure is rotated in conjunction with the swiveling and the gas is rotated. In the thermal power control apparatus provided with a connecting mechanism for increasing or decreasing the flow rate of the operating lever, the swing center of the operating lever and the rotation center of the closing member are provided at a predetermined interval, and the connecting mechanism is provided with the operating lever. A main driving gear that is connected and teeth are arranged on a circumference centering on the swing center of the operation lever, and a driven gear that meshes with the main driving gear and is concentrically connected to the closing member; By rotating the operating lever, the driven gear is rotated by the main driving gear to rotate the closing member.

  The operating force for the operating lever is transmitted as a rotational force from the main driving gear to the closing member via the driven gear. Since the rotational force from the main drive gear to the driven gear always acts in the tangential direction of the driven gear, the rotational force transmitted by the swing angle of the operating lever does not change and is the most efficient for the driven gear. Rotational force is transmitted.

  As is clear from the above description, according to the present invention, when the closing lever is rotated by the operating lever, the feeling of operation is constant, and the rotational force can be efficiently transmitted from the operating lever to the closing member.

The perspective view of the thermal-power adjustment apparatus by one embodiment of this invention Plan view showing the swinging state of the control lever The figure which shows the up-and-down movement when the control lever swing Plan view showing another embodiment Diagram showing conventional configuration

  Referring to FIGS. 1 and 2, reference numeral 1 denotes a thermal power control apparatus according to the present invention. Reference numeral 2 denotes an operation lever for adjusting the thermal power, which is connected by a pin 23 to a bracket 22 that is swingably held around a swing shaft 21. A spring 24 described later is contracted between the bracket 22 and the operation lever 2.

  In the above configuration, the operation lever 2 can swing about the swing shaft 21 in the left-right direction, and can swing about the pin 23 in the up-down direction. The spring 24 acts to urge the tip of the operation lever 2 downward.

  The thermal power control apparatus 1 incorporates a closing member (not shown) conventionally known from Japanese Patent Application Laid-Open No. 9-159053 shown as Patent Document 2 above. The closing member has a truncated cone shape, and an opening serving as a gas passage is formed on the peripheral surface. An opening is also formed in the peripheral wall in which the closing element is accommodated. When the opening in the surrounding wall and the opening in the closing element coincide with each other, the gas is supplied to the downstream gas burner through the matching part. Then, by rotating the closure and increasing the area of the coincident part, the amount of gas supplied to the gas burner increases and the thermal power increases, and conversely, if the area of the coincident part decreases, it is supplied to the gas burner. The amount of gas generated decreases and the thermal power becomes smaller. When the area of the matching part is further reduced and the area of the matching part becomes zero (fully closed state), no gas is supplied to the gas burner, and the gas burner is extinguished.

  A main driving gear 31 centering on the swing shaft 21 is fixed to the bracket 22. Accordingly, when the operation lever 2 is swung left and right, the main driving gear 31 is rotated together with the bracket 22.

  The closing member is housed below the lock pin 4. A driven gear 32 that rotates about the lock pin 4 is connected to the closing element. Accordingly, when the driven gear 32 is rotated around the lock pin 4, the closing member housed below rotates at the same angle. The driven gear 32 is meshed with the main driving gear 31. However, the lock pin 4 locks the closing member so that the closing member does not rotate when the closing member is in a fully closed state. When the locking pin 4 is in the lock position shown in the drawing, the closing member 32 is not rotated. It cannot be rotated.

  The lock pin 4 is urged upward, and when the lock pin 4 is pushed down against the urging force, the position of the lock pin 4 becomes the lock release position and the locked state is released. In this state, the driven gear 32 can be rotated to rotate the closing member, but the rotation torque is continuously applied to the driven gear 32, that is, the closing member continues to rotate. Then, there is provided a mechanism in which the lock pin 4 does not return upward even if the force in the push-down direction with respect to the lock pin 4 is released. Since this mechanism is known from Japanese Patent Application Laid-Open No. 9-159053, which is the above-mentioned Patent Document 2, a detailed description thereof is omitted. However, if the closing pin is rotated while the lock pin 4 is pressed down, the mechanism is not described. The closing member can be rotated to an ignition position set at a position exceeding the fully open position. At the ignition position, the microswitch is turned on and an ignition device (not shown) is operated to spark discharge to the gas burner. Is started. In this state, the closing member is the same as in the fully open state, so that gas is ejected from the gas burner and ignited by the spark.

  When the rotational torque with respect to the driven gear 32 is released, the lock pin 4 returns upward by the urging force. However, when the lock pin 4 is returned to the heating power adjustment range in this state, the driven gear 32 can be rotated to the ignition position beyond the fully open position. Disappear. Even if the lock pin 4 returns upward, the lock function by the lock pin 4 does not operate until the closing member is returned to the fully closed position and the gas burner is extinguished. As a result, the closing member is in the fully closed state and the fully open position. The heating power can be freely rotated within a heating power adjustment range sandwiched between them, and the heating power of the gas burner is adjusted according to the rotation angle.

  In addition, 11 is a partition, and when liquid material, such as water, is applied from the front, it dams up so that the liquid material may not reach the part in which the closure is incorporated. At the same time, as will be described later, when the tip of the operation lever 2 is pushed down, the operation lever 2 is restricted from being pushed down more than necessary. Specifically, when the operation lever 2 is pushed down, a downward projecting portion 25 formed on the operation lever 2 comes into contact with the upper edge of the partition wall 11 to restrict the operation lever 2 from being pushed down further. Further, a convex portion 25 is formed in order to reduce the frictional force when the operation lever 2 is pushed down and swung left and right while being in contact with the upper edge of the partition wall 11. Furthermore, when a large force is instantaneously applied to the front end of the operation lever 2 in the left-right direction, that is, in the heating power adjustment direction, it is in contact with the safety walls 11a and 11b so that the force does not act on the closing member. The safety claw 26 is formed on the operation lever 2.

  The operation of the thermal power control apparatus 1 having the above configuration will be described with reference to FIGS. Since the main driving gear 31 is engaged with the driven gear 32, when the operating lever 2 swings from the fully closed position shown in the drawing toward the fully open position, the driven gear 32 rotates to rotate the closing member. . However, since the lock by the lock pin 4 is acting in the fully closed position, the operation lever 2 cannot be swung from the fully closed position unless the locked state is released.

  As described above, it is necessary to push down the lock pin 4 in order to release the locked state. Therefore, when the tip of the operation lever 2 is pushed down, the lower surface of the operation lever 2 comes into contact with the tip of the lock pin 4 and pushes down the lock pin 4. However, since the lock pin 4 is urged upward, in order to push down the tip of the operation lever 2, the tip of the operation lever 2 is pushed down against the urging force that urges the lock pin 4 upward. There is a need. Here, since the urging force of the spring 24 acts in the direction of lowering the tip of the operation lever 2, the force required to actually push down the tip of the operation lever 2 by the urging force of the spring 24 is reduced. Even when the operating lever 2 is not touched, the operating lever 2 is biased downward by the biasing force of the spring 24, so that the rattling of the operating lever 2 is prevented and the tip of the operating lever is held. The feeling during operation is improved.

  As described above, when the operation lever 2 is swung from the fully closed position toward the fully open position, first, the tip of the operation lever 2 is pushed down to bring the lock pin 4 to the unlocked position. In this state, the convex portion 25 of the operation lever 2 is in contact with the upper edge low portion 11L of the partition wall 11. If the operating lever is swung to the right in the state as it is, the convex portion 25 moves along the upper edge lower portion 11L, but the tip of the lock pin 4 rubs the lower surface of the operating lever 2. When the operation lever 2 is further swung, the convex portion 25 rides on the upper edge high portion 11H.

  In a state where the operation lever 2 continues to swing, the lock pin 4 keeps being kept lowered even if the pressing force on the lock pin 4 is released. Therefore, when the convex portion 25 rides on the upper edge high portion 11H, the operation lever 2 is separated from the tip of the lock pin 4, and the lock pin 4 does not rub against the lower surface of the operation lever 2.

  When the control lever 2 is further swung to the right, the control lever 2 is swung to the ignition position beyond the fully open position. Here, when ignition to the gas burner is confirmed, the operation lever 2 is released. Then, the operation lever 2 is pushed up by the lock pin 4 that returns upward and is returned to the fully open position. Since the gas burner is ignited in this state, the heating power of the gas burner can be adjusted by moving the operation lever 2 within the heating power adjustment range. When the operation lever 2 is finally returned to the fully closed position, the lock by the lock pin 4 is activated, and the operation lever 2 cannot be swung rightward unless the operation lever 2 is depressed again.

  In the above-described embodiment, the upper edge of the partition wall 11 is made up of the upper edge low portion 11L and the upper edge high portion 11H so that the lock pin 4 is attached to the lower surface of the operation lever 2 while the operation lever 2 is swinging. However, a recess may be formed on the lower surface of the operation lever 2 so that the recess can escape from the tip of the lock pin 4 during the swinging.

  In the above configuration, the operating force applied to the operating lever 2 can be efficiently converted into the rotational force of the closing lever by the coupling mechanism constituted by the main driving gear 31 and the driven gear 32, and the operating feeling of the operating lever 2 is the swing of the operating lever 2. It becomes light without changing with the angle. Further, by changing the gear ratio, the ratio between the swing angle of the operation lever 2 and the rotation angle of the closing member can be freely changed.

  Further, in the above configuration, the width of the tip of the operation lever 2 is made narrower than the width of other portions, and when an unnecessarily large force is applied to the tip, the tip portion is deformed to absorb the force. As shown in FIG. 4, a notch 2a may be provided, and the force may be absorbed by positively deforming at the notch 2a portion.

  Although the rotation direction of the closing element is opposite to that of the above embodiment, the rack 33 which is a part of the internal gear is fixed to the operation lever 2 as a main driving gear, and the rack 33 is connected to the driven gear 32. You may make it mesh.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Thermal power adjusting device 2 Operation lever 31 Main drive gear 32 Driven gear 4 Lock pin

Claims (1)

The control lever includes a control lever whose front end extends toward the front, and a closing member that increases or decreases the gas flow rate according to the rotation angle. The closing member has a lock pin that can be moved forward and backward on the rotation axis. By pushing down the tip of the lever at the fully closed position, the lock pin is pushed down on the lower surface of the operation lever to release the lock on the operation lever, and further, the operation lever is swung left and right to swing beyond the fully open position to the ignition position. Then, it is configured to ignite the gas burner, and when the operation lever is swung in the left-right direction, in the thermal power control apparatus provided with a coupling mechanism that rotates the closing member in conjunction with the swing to increase or decrease the gas flow rate, A swing center of the operation lever and a rotation center of the closing member are provided at a predetermined interval, and the coupling mechanism is connected to the operation lever and is a circle centered on the swing center of the operation lever. It consists of a main drive gear with teeth arranged on top and a driven gear meshed with the main drive gear and concentrically connected to the closure, and the driven gear is rotated by the main drive gear by swinging the operating lever. The thermal power control device characterized by rotating the closure.

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