JP5963799B2 - Thermal power control device - Google Patents

Description

  The present invention relates to a thermal power control apparatus that is incorporated in a gas stove and adjusts the thermal power of the gas burner by swinging an operation lever to increase or decrease the amount of gas supplied to the gas burner.

  As a thermal power control apparatus as described above, for example, a die-cast main body holds a needle valve so as to freely advance and retract from the front side to the back side, and the amount of gas supplied to the gas burner by the advancement and retraction of this needle valve Is known to increase or decrease (for example, see Patent Document 1).

  In this configuration, an engagement pin extending in a direction perpendicular to the advancing / retreating direction of the needle valve is provided at the front end portion of the needle valve. A cylindrical storage hole for storing the needle valve is opened to the outside, and a slit-shaped guide groove into which an engagement pin is fitted is formed in the open portion. With this configuration, when the needle valve advances and retreats, the engagement pin moves in the guide groove, and during the movement, the needle valve is prevented from rotating by the cooperation of the engagement pin and the guide groove.

  In addition, an operation lever is swingably held on the upper part of the main body, and a slit-like drive portion is formed on the operation lever so as to intersect the guide groove, and the engagement pin is inserted into the drive portion. .

  With this configuration, when the operating lever is swung, the overlapping position of the guide groove and the drive unit moves, so that the needle valve reciprocates in the front-rear direction via the engagement pin.

Japanese Patent Laying-Open No. 2010-203656 (FIG. 1)

  In the above-mentioned conventional thermal power control device, the slit-shaped guide groove is vertically removed, so even if liquid material such as simmered drops from above, most of it flows down further through the guide groove . However, since the left and right portions of the guide groove are in contact with the outer peripheral surface of the front end portion of the needle valve, there is a risk that the liquid material may enter the minute gap in the contact portion by capillary action. For this reason, even if the liquid material is formed so that the liquid material passes vertically in the guide groove, a certain amount of liquid material may enter the main body along the outer peripheral surface of the needle valve.

  Therefore, in view of the above problems, the present invention provides a thermal power control capable of preventing the liquid material from entering the main body as much as possible even when the liquid material is dropped on the front side end portion of the needle valve. It is an object to provide an apparatus.

In order to solve the above-mentioned problems, a thermal power control apparatus according to the present invention has a needle valve that is movably held by a main body, and is provided at a front end of the needle valve in a direction perpendicular to the advancing / retreating direction of the needle valve. A slit-like guide member is provided with an extending engagement pin, and slit-like guide means through which the engagement pin is inserted is provided on the main body side, and the engagement pin is inserted into an operation lever swingably held by the main body. The drive part is formed and the operation lever is swung to displace the part where the guide part and the drive part overlap, and the needle valve is advanced and retracted via the engagement pin inserted through this overlap part, In the thermal power adjusting device for adjusting, the front end of the needle valve protrudes from the main body so that the engagement pin is moved from the main body, and a plate-shaped guide plate is attached to the main body. Attached, there is formed a guide portion which functions as the guide means to the guide plate, the portion holding swingably the operating lever, to form a cylindrical positioning portion, the positioning in the guide plate In addition to forming a positioning hole through which the portion is inserted, a detent portion is formed on both the cylindrical surface of the positioning portion and the peripheral edge of the positioning hole to engage with each other to prevent the guide plate from rotating. .

  In the conventional thermal power control apparatus, the engagement pin provided on the needle valve is guided by the slit-shaped guide groove. However, in the above configuration, the front end where the engagement pin is provided is exposed from the main body. Therefore, even if a liquid material such as spilled liquid drops on the front end of the needle valve, it falls down without entering the main body. Since the slot-shaped guide groove was eliminated, a plate-shaped guide plate was separately provided, and a guide portion was formed on this guide plate.

  Note that when a small amount of liquid material enters the main body, friction between the needle valve and the main body may increase, or may stick and make it difficult to move the needle valve forward and backward. In such a case, the longitudinal direction of the guide portion may be formed so as to be inclined with respect to the reciprocating direction of the needle valve so that the needle valve rotates when the needle valve moves forward and backward.

By the way , it is necessary to position the guide plate with respect to the main body by separately forming the guide plate with respect to the main body. Therefore, a cylindrical positioning portion is formed in a portion that holds the operation lever in a swingable manner, and a positioning hole through which the positioning portion is inserted is formed in the guide plate, and the cylindrical surface of the positioning portion and the positioning hole are formed. Rotation stoppers that engage with each other to prevent rotation of the guide plate were formed on both of the peripheral edges of the guide plate.

  As is clear from the above description, the present invention exposes the front end portion of the needle valve provided with the engagement pin from the main body, so even if a liquid material drops on this front end portion, It is possible to prevent the liquid material from entering the main body as much as possible.

The figure which shows the structure of one embodiment of this invention An exploded perspective view showing the shapes of the operation lever and the guide plate Sectional view showing the structure of the needle valve Plan view showing details of guide holes

  With reference to FIG. 1, 1 is an example of a thermal power control apparatus according to the present invention. This thermal power control apparatus 1 has an operation lever 3 attached to an upper portion of a die-cast main body 2 so as to be swingable in a horizontal direction, and is supplied to a gas burner (not shown) by swinging the operation lever 3 in the left-right direction. The amount of gas produced increases or decreases, thereby adjusting the heating power of the gas burner. In addition, 11 is a point fire extinguisher button. When the point fire extinguishing button 11 is pushed, the gas burner is ignited. When the point fire extinguishing button 11 is pushed again, the supply of gas to the gas burner is stopped and the gas burner is extinguished.

  Referring to FIG. 2, reference numeral 5 denotes a needle valve, and the amount of gas supplied to the gas burner increases or decreases when the needle valve 5 advances and retreats and enters and exits the main body 2.

  An engagement pin 51 extending at a right angle to the reciprocating direction of the needle valve 5 is provided at the front end of the needle valve 5. The engagement pin 51 is inserted into the guide hole 41 of the plate-like guide plate 4 attached to the main body and also inserted into the drive hole 31 of the operation lever 3.

  A cylindrical positioning portion 23 is formed on the upper portion of the main body 2, and is formed so that the positioning portion 23 is fitted in a positioning hole 42 formed in the guide plate 4. In addition, a pair of anti-rotation protrusions 24 are formed on the positioning portion 23, and the anti-rotation protrusions 24 engage with a pair of anti-rotation recesses 43 formed in the positioning hole 42, whereby the guide plate 4 Is prevented. The guide plate 4 was prevented from coming off upward by screwing the guide plate 4 to the main body 2.

  3 and 4, the guide hole 41 has a linear slit shape, and the drive hole 31 has a curved long hole shape. Therefore, when the operation lever 3 is swung left and right, the intersection of the guide hole 41 and the drive hole 31 moves back and forth. Since the engagement pin 51 is located at this intersection, the engagement pin 51 moves back and forth along the guide hole 41 when the operation lever 3 is swung. As a result, the needle valve 5 moves back and forth together with the engagement pin 51 to adjust the heating power of the gas burner.

  As shown in FIG. 4, the longitudinal direction of the guide hole 41 is not formed parallel to the advance / retreat direction of the needle valve 5, but is inclined at an angle α with respect to the advance / retreat direction of the needle valve 5. Thus, by forming the guide hole 41 at an angle, the needle valve 5 is rotated when the needle valve 5 is advanced and retracted.

  In the above configuration, the front end portion of the needle valve 5 is completely exposed from the main body 2, so that even if a liquid material such as spilled from the upper side is dropped on the front end portion, the needle valve 5 enters the main body 2. Without falling, it falls further downward, but there is a risk that it will slightly enter the main body 2 along the peripheral surface of the needle valve 5. Even when the needle valve 5 is fixed to the main body 2 by the infiltrated liquid material, the sticking is eliminated by rotating the needle valve 5 when the needle valve 5 is advanced or retracted, and the heating power is adjusted smoothly. It can be performed.

  In addition, although a detergent etc. may be sprayed from the front surface of a gas appliance in the horizontal direction, it may be applied to the operation lever 3 so that a liquid material may not be applied to the needle valve 5 with respect to the penetration | invasion of the liquid material from such a front surface. Formed a protective wall 32, and formed a protective portion 44 on the guide plate 4.

  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 adjustment apparatus 2 Main body 3 Operation lever 4 Guide plate 5 Needle valve 11 Point fire extinguishing button 11 Point fire extinguishing button 31 Drive hole 41 Guide hole 51 Engagement pin

Claims (2)

The needle valve is held in the main body so as to be able to advance and retract. An engagement pin extending in a direction perpendicular to the advancing / retreating direction of the needle valve is provided at the front end of the needle valve, and the engagement pin is inserted therethrough. The slit-shaped guide means is provided on the main body side, and a slit-shaped drive portion through which the engagement pin is inserted is formed on the operation lever that is swingably held by the main body, and the operation lever is swung. In a thermal power adjustment apparatus that displaces a portion where the guide portion and the drive portion overlap and moves the needle valve forward and backward through an engagement pin inserted through the overlap portion to adjust the thermal power, the engagement pin is moved. The front end of the needle valve protrudes from the main body so as to be exposed from the main body, and a plate-shaped guide plate is attached to the main body, and the guide plate functions as the guide means. Be one obtained by forming the de section, the portion holding swingably the operating lever, to form a cylindrical positioning portion, to form a positioning hole positioning unit to the guide plate is inserted, A heating power adjusting device characterized in that a rotation preventing portion that engages with each other to prevent rotation of the guide plate is formed on both the cylindrical surface of the positioning portion and the peripheral edge of the positioning hole .   The thermal power control apparatus according to claim 1, wherein a longitudinal direction of the guide portion is inclined with respect to a reciprocating direction of the needle valve.

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